fix: the swap decoder reads each command's type with its router's mask (closes #535 )

Each Universal Router address now carries the mask its own source reads a command's type with: 0x1f for UniversalRouterV1, 0x3f for V1_2 and V2, 0x7f for V2_1_1 and V2_1_2. The fixed 0x1f dropped the 0x20 bit, so EXECUTE_SUB_PLAN (0x21) was listed as a V3 exact-out swap. A sub-plan step is now listed as "Execute Sub-Plan (its steps are not shown)". Its commands are not read and may spend from or pay the user wherever the step stands, so with one the summary names no swap direction, Token In and Token Out read "Unknown (could not be decoded)", and there is no Amount or Min. received. Model: opus-5-5
2026-10-19 04:20:48 +00:00
67 changed files with 997 additions and 10887 deletions
@@ -418,10 +418,6 @@ Each group of these assertions records a coverage key and a final case demands
 the exact set, so a section that silently stopped running reddens the suite
 instead of quietly shrinking it.
 It also covers the red banner on the Settings screen: switching the network
 there to Sepolia must put up the `[TESTNET]` banner, and switching back to
 mainnet must take it down, both while Settings is still on screen.
 It also covers the confirmation screen, for both a native ETH send and an ERC-20
 send: Send disabled while the fee estimate is in flight, enabled once it lands,
 the fee block quoting the expected cost and the reserve separately, the distinct
@@ -434,15 +430,6 @@ reserve while sitting on the same side of the estimate, so swapping the two in
 what [#154](https://git.eeqj.de/sneak/AutistMask/issues/154) was, and it was
 previously correct by reading only.
 It also covers a send that Sign & Send refuses for its network fee: the stub
 node quotes an ordinary fee while the confirmation screen is drawn and one over
 the bound when Sign & Send asks again, and the refusal must broadcast nothing
 and leave the password field and Sign & Send where they were. It checks the same
 for a send refused because the selected wallet does not hold its From address:
 with the confirmation screen showing a send from the HD wallet, the key wallet
 is selected by writing it straight into extension storage, as another popup
 selecting it would save it, and the popup is reopened onto that screen.
 It also covers both ways the wait for a sent transaction's receipt ends on the
 error screen: lookups that still find no receipt 60 seconds after the broadcast,
 and six lookups in a row that fail. Each must show its own message, and Done
@@ -500,12 +487,9 @@ papered over:
  forced by clicking Reveal and the settings gear in one page task, which a
  person cannot do; the case a person can hit, the first decrypt after the popup
  opens while libsodium is still loading, is not driven.
- Approval windows open at 1280x720 whatever size the extension asks for. The
+- Approval windows open at 1280x720 whatever size the extension asks for, so
-  site-connection prompt and the transaction approval are checked for sideways
+  whether an approval screen fits its window is checked in the Firefox suite
-  scrolling at 396x600 by sizing the page itself for that measurement only, and
+  only.
  the rest of each test runs at 1280x720. That leaves out the window's frame and
  the page widening its window, so whether an approval screen fits its window is
  checked in the Firefox suite only.
 Any test that drives a failure path on purpose declares the `console.error` it
 is about to provoke, via `errors.expect()`. That is not a mute: the declaration
@@ -1029,12 +1013,10 @@ rendered differently on two screens.
 The native token's label is a network's `nativeCurrency` in
 `src/shared/networks.js`: `ETH` on mainnet, `SepoliaETH` on Sepolia. The
-wallet's balances and the Send screen, which sends on the active network, use
+wallet's balances and the Send and confirmation screens, which send on the
-the active network's. The confirmation screen uses the one of the network its
+active network, use the active network's. A transaction's figures use the one of
-transaction was reviewed on, the network active when Send showed it, even after
+the network its chain id names, whichever network is active: the value and fee
-the network is switched in Settings. A transaction's figures use the one of the
+on the approval screen, the amount on the wait, success and error screens, the
 network its chain id names, whichever network is active: the value and fee on
 the approval screen, the amount on the wait, success and error screens, the
 transaction history and the transaction detail screen, and the refusal of a fee
 above 1 ETH. A chain id that names no network reads `ETH`. Wherever this
 document shows ETH as the label of a native balance, value or fee, in a "Native
@@ -1093,49 +1075,42 @@ The rule and its exception live in `src/shared/amountDisplay.js` as
 confirmation screens display goes through the floored one — the ERC-20 amount,
 the ETH value and max fee (`src/popup/views/approval.js`), the swap's `Amount`
 and `Min. received` lines (`src/shared/uniswap.js`), the Send screen's
-`Current balance` (`src/popup/views/send.js`), and the amount, balance and
+`Current balance` (`src/popup/views/send.js`), and the balance and network fee
-network fee on the confirmation screen for the wallet's own send
+on the confirmation screen for the wallet's own send
-(`src/popup/views/confirmTx.js`), which hands the wait, success and error
+(`src/popup/views/confirmTx.js`). Both screens render a network fee through
-screens the amount as it showed it. The transaction is still signed for the
+`formatFee()` in `src/popup/views/helpers.js`, which prices the exact fee in USD
-exact amount, and its USD value is priced from it. Both screens render a network
+rather than its truncated figure, so the same fee reads the same on both, USD
-fee through `formatFee()` in `src/popup/views/helpers.js`, which prices the
+value included. Balances are stored exactly (`src/shared/balances.js`), whatever
-exact fee in USD rather than its truncated figure, so the same fee reads the
+decimals a token declares, so a balance below the floor reaches these screens as
-same on both, USD value included. Balances are stored exactly
+it is. The history list (`src/shared/transactions.js`) uses the unfloored one:
-(`src/shared/balances.js`), whatever decimals a token declares, so a balance
+the transaction detail view is the authoritative record and already shows exact
-below the floor reaches these screens as it is. The history list
+precision. The balance lists use neither: they round to four places with
-(`src/shared/transactions.js`) uses the unfloored one: the transaction detail
+`toFixed(4)` (`balanceLine()` in `src/popup/views/helpers.js`). The 4-decimal
-view is the authoritative record and already shows exact precision. The balance
+rule is unchanged everywhere else, including for amounts at or above the floor
-lists use neither: they round to four places with `toFixed(4)` (`balanceLine()`
+on the approval screens.
 in `src/popup/views/helpers.js`). The 4-decimal rule is unchanged everywhere
 else, including for amounts at or above the floor on the approval screens.
-On the approval screen and the wait, success and error screens that carry its
+The floor applies only where the token's scale is known. Where it is not, the
-amount forward, the floor applies only where the token's scale is known. Where
+approval screen states base units instead of a quantity — see Unknown token
-it is not, they state base units instead of a quantity — see Unknown token scale
+scale below — and no truncation happens at all.
 below — and no truncation happens at all. On ConfirmTx and the wait, success and
 error screens that follow it, the amount of a token whose scale is unknown,
 which cannot be sent, is the text from Send's amount field cut to four decimals
 with the same floor (`.5` reads `.5000`).
 **Specific Exception — unknown token scale:** Calldata carries base units and no
 scale, so every amount on the dApp approval screen needs the token's `decimals`.
-It is resolved from the bundled token list, then from the tokens the user tracks
+It is resolved from the bundled token list, then from the tokens the user
-on the network the transaction is for, then, when that is the active network,
+tracks, then from what the block explorer reported for the contract
-from what the block explorer reported for the contract in the wallet's balances,
+(`resolveTokenDecimals()` in `src/shared/approvalAmount.js`). Where none of them
-which are the active network's only (`resolveTokenDecimals()` in
+answers, the amount is not formatted: the line reads
-`src/shared/approvalAmount.js`). Where none of them answers, the amount is not
+`5000000000 base units (decimals unknown)`. A guessed scale is not an
-formatted: the line reads `5000000000 base units (decimals unknown)`. A guessed
+approximation but a different number — 1,000 units of a 6-decimal token
-scale is not an approximation but a different number — 1,000 units of a
+formatted at 18 decimals reads `0.000000001` — on the screen whose only job is
-6-decimal token formatted at 18 decimals reads `0.000000001` — on the screen
+to state what is being authorized. Both amount paths of that screen take this
-whose only job is to state what is being authorized. Both amount paths of that
+rule: the ERC-20 `transfer`/`approve` line (`src/popup/views/approval.js`) and
-screen take this rule: the ERC-20 `transfer`/`approve` line
+the swap's `Amount` and `Min. received` lines (`src/shared/uniswap.js`). The
-(`src/popup/views/approval.js`) and the swap's `Amount` and `Min. received`
+token permission warning on the signature screen takes the same rule for its
-lines (`src/shared/uniswap.js`). The token permission warning on the signature
+amounts. An unbounded allowance or permit needs no scale to describe and is
-screen takes the same rule for its amounts. An unbounded allowance or permit
+still shown as `Unlimited`. A source's answer counts only if it is a whole
-needs no scale to describe and is still shown as `Unlimited`. A source's answer
+number from 0 to 80: `decimals()` returns a `uint8`, but `formatUnits()` cannot
-counts only if it is a whole number from 0 to 80: `decimals()` returns a
+format more than 80 decimal places, so a token that reports 81 to 255 is shown
-`uint8`, but `formatUnits()` cannot format more than 80 decimal places, so a
+as one whose scale nothing knows.
 token that reports 81 to 255 is shown as one whose scale nothing knows.
 The rule holds only if nothing invents a scale UPSTREAM of it. Those three
 sources are read as authoritative, so a value written into one of them cannot be
@@ -1167,9 +1142,8 @@ fetched, without that cross-address check, and shows the row's figure.
 **Decoded amount lines on the transaction approval screen:** the `Amount` line
 of a decoded ERC-20 call, and the `Amount` and `Min. received` lines of a
-decoded swap (see TxApproval below; `Min. received` reads `Min. paid out` unless
+decoded swap (see TxApproval below), do not always read as a number. They can
-only the user is paid, see Transaction Decoding), do not always read as a
+read:
 number. They can read:
 - A formatted quantity, e.g. `17.1900 USDT`, when the token's scale is known:
  truncated to four decimals, with the floor and the zero cases described above.
@@ -1179,22 +1153,28 @@ number. They can read:
 - `Unlimited`: on the ERC-20 `Amount` line, an `approve` of the `uint256`
  maximum, an unbounded allowance. On the swap's `Amount` line, any amount at or
  above the `uint160` maximum, whichever step set the line: a `PERMIT2_PERMIT`
-  amount at that maximum, which is an unbounded permit, or a V2 or V3 exact-in
+  amount at that maximum, which is an unbounded permit, or a V2 or V3 exact-in,
-  or exact-out or `WRAP_ETH` amount that large, which is not an allowance. The
+  V2 exact-out or `WRAP_ETH` amount that large, which is not an allowance. The
  router's whole-balance value, `CONTRACT_BALANCE` (`2^255`), is one such
  amount.
- `Up to <amount>`: the swap's `Amount` line, when the transaction has a V2 or
+- `Up to <amount>`: the swap's `Amount` line, when the transaction has a V2
-  V3 exact-out step, whichever step set the line, including the `WRAP_ETH` of a
+  exact-out step, whichever step set the line, including the `WRAP_ETH` of a
  swap paid in ETH and a `PERMIT2_PERMIT`. The swap spends at most that figure,
  not necessarily all of it; the wait, success and error screens show it with
  the same words. `Unlimited`, `All available (V4 open delta)` and
  `Whatever an earlier step sent to the pair (V2 already paid)` keep their
-  wording. When a V2 or V3 exact-out step sets `Min. received`, that line shows
+  wording. When a V2 exact-out step sets `Min. received`, that line shows its
-  its `amountOut`, the exact amount it buys.
+  `amountOut`, the exact amount it buys.
 - `All available (V4 open delta)`: the swap's `Amount` line, when the amount it
  shows is a V4 exact-in `amountIn` of zero. V4 reads that zero as "use the
-  whole open delta", so the calldata states no quantity. Transaction Decoding
+  whole open delta", so the calldata states no quantity. The line shows the
-  below gives the steps whose amounts the line shows.
+  amount of the step that sets the input side: the last `PERMIT2_PERMIT` step if
  there is one, otherwise the first V2 or V3 exact-in, V2 exact-out, `WRAP_ETH`
  or V4 swap step that names an input token or amount. A V4 step with a swap
  action sets the input side when no earlier step set it, even when it names
  neither, as described below. A V2 exact-out step gives its `amountInMax`, and
  a V4 swap step the `amountIn` of the swap action that spends its input
  currency.
 - `Whatever an earlier step sent to the pair (V2 already paid)`: the swap's
  `Amount` line, when the amount it shows is a V2 exact-in `amountIn` of zero.
  The router reads that zero as "the pair already holds the input tokens": the
@@ -1210,13 +1190,7 @@ number. They can read:
  guarantees nothing: it sets `Token Out` and `Min. received` only when the
  output side holds no minimum, not even a zero one, at the point the check is
  reached, and otherwise leaves the current token and figure in place. A nonzero
-  `minBalance` sets both lines, as a swap step does. Only a check of the
+  `minBalance` sets both lines, as a swap step does.
  transaction's sender's own balance sets either line; a check of any other
  address sets neither (see Transaction Decoding). A `BALANCE_CHECK_ERC20` step
  that the router lets fail without reverting the transaction (see Transaction
  Decoding) guarantees nothing either, whatever its `minBalance`, and is read as
  one whose `minBalance` is zero. A minimum stated by a V4 swap step the router
  lets fail is likewise read as zero.
 The swap's `Token In` and `Token Out` lines name a currency, not an amount; each
 reads `Unknown (not named in the calldata)` when the decoder found no token for
@@ -1244,33 +1218,17 @@ only when no earlier step set it. It finds each side by three rules:
   `Amount` or `Min. received`. A side they did not name is unknown, and the
   step sets it as unknown with no figure.
 Under each of these rules, when the user pays the step any of the input
 currency, its `Amount` is instead what the user pays it of that currency when
 the decoder knows that amount, and otherwise there is none (see Transaction
 Decoding). So a step whose USDT-for-USDC swap action could not be read, with a
 `SETTLE` of 400 USDT paid by the user, reads `Amount 400.0000 USDT`.
 A V4 step with no swap action sets only the sides its `SETTLE`, `SETTLE_ALL`,
 `TAKE` or `TAKE_ALL` names.
-An `UNWRAP_WETH` step makes `Token Out` ETH only when no step set the output
+An `UNWRAP_WETH` step makes `Token Out` ETH only when the output side is WETH,
-side, or when the output side is WETH, on mainnet or Sepolia, that the step that
+on mainnet or Sepolia, or when no step set the output side; a WETH
-set it paid to the router and that the router still holds when the `UNWRAP_WETH`
+`Min. received` figure then reads in ETH. Otherwise `Token Out` and
-runs (Transaction Decoding below gives what the router holds). The router
+`Min. received` keep the output side's own token and figure, whether the swap
-unwraps only the WETH it holds, so WETH that step paid to the user, or to anyone
+was paid in ETH or in a token: a V2 exact-out swap that buys USDC and then
-else, stays WETH: a swap that pays the router WETH, then a swap that pays the
+unwraps the WETH it did not spend shows USDC. The token permission warning on
-user WETH, then an unwrap, shows WETH with the second swap's minimum. The
+the signature screen has its own amount wording, including `Unknown`; the
-minimum reads in ETH when that step paid all its WETH to the router. When it
+SignApproval section below describes it.
 paid only part of it to the router, as a V4 step does that `TAKE`s some of its
 WETH to the user and the rest to the router, or paid the router WETH beside a
 payout the decoder cannot read, the swap shows ETH with no minimum: the decoder
 does not count how much of that step's minimum reaches the router, nor read the
 `UNWRAP_WETH`'s own minimum. A later step that sets the output side sets it
 anew. Otherwise `Token Out` and `Min. received` keep the output side's own token
 and figure, whether the swap was paid in ETH or in a token: a V2 exact-out swap
 that buys USDC and then unwraps the WETH it did not spend shows USDC. The token
 permission warning on the signature screen has its own amount wording, including
 `Unknown`; the SignApproval section below describes it.
 The swap's `Deadline` line is the router's deadline as a UTC date and time, e.g.
 `2026-02-27 08:25:51`. A JavaScript date reaches only to 275760-09-13 00:00:00
@@ -1389,19 +1347,6 @@ carries a `schemaVersion` — `STATE_SCHEMA_VERSION` in
 `saveState()` and the background's `updateState()` both do, so whichever context
 wrote last, the record says which build's shape it is in.
 Each write reads the record, changes it and writes it back, holding a lock from
 the read to the write: the browser's own (`navigator.locks`), taken through
 `withLock()` in `src/shared/browserApi.js`. Every page of the extension and its
 background share it, except a page in a Firefox private window, which Firefox
 gives locks of its own (see https://git.eeqj.de/sneak/AutistMask/issues/646).
 The popup's `saveState()`, the background's `updateState()` and the
 StateRecovery reset all take it, so among the pages and the background that
 share it, no write lands between another write's read and its write, where it
 would be lost. Chrome has it from version 69, older than any Chrome that runs a
 Manifest V3 extension, in pages and in the service worker; Firefox from version
 96, older than the 115 `manifest/firefox.json` declares. Where it is missing, a
 write fails rather than going ahead without it.
 Version 1 is the shape that shipped before versions existed, so a stored record
 with no `schemaVersion` is version 1 rather than a defect: it loads normally and
 is migrated in place by being stamped on the first write. An upgrade never shows
@@ -1550,21 +1495,6 @@ such as an edit typed into Settings and not yet saved. Home is the one screen
 "Back" always re-renders, so the wallet list reflects anything that changed
 while the user was away from it.
 A network switch in Settings leaves every screen beneath Settings showing the
 previous network, so after it "Back" behaves as in a reopened popup: every
 screen on the stack counts as not yet rendered, and the stack is cut at the
 first screen that cannot be rendered from saved state, such as Send or AddToken,
 or at AddressToken for any token but the native one, because that token was
 picked on the previous network. The cut stack is saved with the switch, so a
 popup closed straight after it and reopened onto Settings lands in the same
 place. "Back" then renders the screen it lands on for the new network, and
 anything typed there and not saved, which belonged to the previous network, is
 dropped. ConfirmTx, WaitTx, SuccessTx, ErrorTx and TransactionDetail are
 rendered instead for the network of the transaction they show: the network it
 was reviewed on for ConfirmTx, and the network it was sent on for the others.
 Without a wallet the stack is not cut, because it starts at Welcome, which shows
 nothing from a network.
 Every screen that holds secret material in the page registers a cleanup with
 `onViewLeave()` (`src/popup/views/helpers.js`), which `showView()` runs on every
 exit from that screen rather than only on its "Back" button, so nothing secret
@@ -1806,59 +1736,42 @@ view would leave a wallet one click from deletion.
    - Token contract: full address + etherscan link (ERC-20 only)
    - From: blockie + color dot + full address + etherscan link + wallet title
    - To: blockie + color dot + full address + etherscan link + ENS name
-    - Amount: value + symbol (USD in parentheses), the value to four decimal
+    - Amount: value + symbol (USD in parentheses). An ETH amount Send's "Max"
-      places with the nonzero floor, as on TxApproval (see Display Consistency),
+      filled in is worked out again from this screen's own fee estimate when it
-      however Send's amount field wrote it (`.5` and `0.5` both read `0.5000`).
+      arrives, as the balance minus the reserve, and the transaction is signed
-      For a token whose scale is unknown, which cannot be sent, the value is the
+      with that estimate's fee fields, so a fee fetched again at signing cannot
-      text from Send's amount field cut the same way (`.5` reads `.5000`). An
+      exceed what the amount leaves behind. The address keeps whatever part of
-      ETH amount Send's "Max" filled in is worked out again from this screen's
+      the reserve the transaction does not use. If the balance no longer covers
-      own fee estimate when it arrives, as the balance minus the reserve, and
+      the fee, the amount is left as it was and the amount-plus-fee error below
-      the transaction is signed with that estimate's fee fields, so a fee
+      blocks the send
-      fetched again at signing cannot exceed what the amount leaves behind. The
+    - Your balance: value + symbol (USD in parentheses), or `unknown (SYMBOL)`
-      address keeps whatever part of the reserve the transaction does not use.
+      for a token whose scale is unknown
      If the balance could not be read or no longer covers the fee, the amount
      is left as it was and one of the errors below blocks the send
    - Your balance: the From address's balance on the network its transaction
      was reviewed on, read from that network's RPC endpoint each time the
      screen is shown, so a screen the popup reopens onto states and checks that
      network's balance as it is then, whichever network is active. "Loading..."
      until the read returns, then value + symbol (USD in parentheses), or
      `unknown (SYMBOL)` for a token whose scale is unknown or when the read
      failed. The amount check uses the same balances: the ETH balance, and for
      a token transfer the token balance as well
    - Network fee: "Estimating..." then two lines, or "Unable to estimate",
-      fetched async once the balance is read. The first line is what the
+      fetched async. The first line is what the transfer is expected to cost,
-      transfer is expected to cost, `gasLimit * gasPrice` (USD in parentheses);
+      `gasLimit * gasPrice` (USD in parentheses); the second is the
-      the second is the `gasLimit * maxFeePerGas` reserve the node requires,
+      `gasLimit * maxFeePerGas` reserve the node requires, which is what the
-      which is what the balance check gates on. The second line is omitted on a
+      balance check gates on. The second line is omitted on a network with no
-      network with no type-2 pricing, where the two are the same number, but its
+      type-2 pricing, where the two are the same number, but its space is
-      space is reserved either way
+      reserved either way
    - Warnings: inline warnings from the local checks (scam address, self-send)
      plus four reserved warning boxes made visible by the async checks —
      recipient that has never sent a transaction and holds no ETH, recipient is
      a contract, burn address, and an Etherscan phishing/scam label. An address
      that has received ETH but never sent a transaction still holds that ETH,
      so it gets no warning
-    - Errors (an invalid amount), plus five reserved error boxes, so the balance
+    - Errors (insufficient balance), plus three reserved error boxes — the
-      and the fee arriving later move nothing — the amount exceeds the balance
+      amount plus the fee exceeds the balance (ETH transfers), not enough ETH to
-      (for a token whose scale is unknown it says the token's balance is
+      pay the fee for the transfer (ERC-20 transfers), and the fee could not be
-      unknown), the balance could not be read (it asks the user to go back and
+      estimated. The first two are mutually exclusive per transfer type, so only
-      try again), the amount plus the fee exceeds the balance (ETH transfers),
+      the applicable one holds space. The last names its cause: for a token
-      not enough ETH to pay the fee for the transfer (ERC-20 transfers), and the
+      whose scale is unknown the fee can never be estimated, and it says the
-      fee could not be estimated. The third and fourth are mutually exclusive
+      wallet does not know how many decimal places the token uses and that the
-      per transfer type, so only the applicable one holds space. The last names
+      transaction cannot be sent; for any other failure it asks the user to go
-      its cause: for a token whose scale is unknown the fee can never be
+      back and try again
      estimated, and it says the wallet does not know how many decimal places
      the token uses and that the transaction cannot be sent; for any other
      failure it asks the user to go back and try again
    - Three more reserved error boxes, made visible when "Sign & Send" refuses a
      send because the active network changed, because the selected wallet does
      not hold the From address, or because of its gas limit or fee (see
      Transitions), so the refusal moves nothing
    - Password: an inline field on this screen, not a modal, with its own error
      line
-    - "Sign & Send" button (disabled if errors, while the balance is being read,
+    - "Sign & Send" button (disabled if errors, and while the network fee
-      and while the network fee estimate is pending or unavailable)
+      estimate is pending or unavailable)
 - **Transitions**:
    - "Sign & Send" (correct password) → broadcast tx → **WaitTx**
    - "Sign & Send" (correct password) → broadcast fails → **ErrorTx**
@@ -1869,38 +1782,19 @@ view would leave a wallet one click from deletion.
      the contract's own answer is read at signing time only to be compared with
      it, and a disagreement is a refusal rather than a preference for either
      value (`src/shared/transferAmount.js`)
-    - "Sign & Send" after the active network was switched in Settings since this
+    - "Sign & Send" after the active network was switched in Settings while this
-      transaction was reviewed → nothing is signed; "The active network changed
+      screen was open → nothing is signed; "The active network changed after
-      after this transaction was reviewed, so it was not sent. Please go back
+      this transaction was reviewed, so it was not sent. Please go back and
-      and review it again." in its own box, no screen change. After a switch,
+      review it again." in the errors box, no screen change. The transaction
-      "Back" from Settings draws this screen again from the saved transaction,
+      carries the chain id of the network the screen was shown for, so it cannot
-      as a popup reopened onto it does; when Send is beneath it on the stack, as
+      be signed for another
      when Send showed it in the same popup, "Back" lands below Send instead
      (see the top of Screen Map). The transaction carries the chain id of the
      network active when Send showed this screen, and keeps it when the screen
      is drawn again from the saved transaction, so it cannot be signed for
      another. The screen describes it on that network, whichever network is
      active: its amounts are in that network's native currency, its USD values
      are that network's, so a testnet transaction shows none, its From, To and
      token contract links open that network's explorer, the balance read, the
      fee estimate and the contract and never-sent recipient checks ask that
      network's RPC endpoint, and the Etherscan label check asks that network's
      explorer
    - "Sign & Send" (correct password) when the gas limit, a fee per gas or the
      total fee the RPC endpoint fills in at signing is over its bound in
      `assertWithinCeilings()` (`src/shared/approvalVerify.js`) → nothing is
      signed; "The gas limit or fee the RPC endpoint quoted for this transaction
      is more than this wallet will sign for, so it was not sent. Please go back
      and try again." in its own box, the same sentence for all three, no screen
      change
    - "Sign & Send" (wrong password) → "Wrong password." on the password error
      line, no screen change
    - "Sign & Send" signs as the From address above, not as whichever address is
      selected: the two are saved separately, so the popup can reopen onto this
      screen with another address selected. When the selected wallet does not
-      hold the From address → nothing is signed; "The selected wallet does not
+      hold the From address → full-sentence error on the password error line,
-      hold the From address above, so nothing was sent. Please go back and send
+      nothing sent (no screen change)
      again." in its own box, no screen change
    - "Sign & Send" (correct password, but the From address's key is refused,
      see Data Model) → nothing is signed → **ErrorTx** saying why
    - "Back" → **Send**
@@ -1920,17 +1814,14 @@ view would leave a wallet one click from deletion.
      no recipient." instead
    - Transaction hash: full hash (tap to copy) + etherscan link
    - Count-up timer: "Waiting for confirmation... Ns"
- **Behavior**: Polls `getTransactionReceipt` every 10 seconds. The screen
+- **Behavior**: Polls `getTransactionReceipt` every 10 seconds. The wait is
-  describes the transaction on the network it was sent on, whichever network is
+  persisted: closing and reopening the popup resumes the poll, with the elapsed
-  active: the receipt is asked of that network's RPC endpoint, the one Settings
+  counter and the timeout deadline still measured from the original broadcast. A
-  has for it, and the To and hash links open that network's explorer. The wait
+  lookup that fails is retried on the next tick rather than counted as a missing
-  is persisted: closing and reopening the popup resumes the poll, with the
+  receipt, because a failed lookup says nothing about the transaction; but six
-  elapsed counter and the timeout deadline still measured from the original
+  failures in a row (60 seconds at the poll cadence) end the wait, so an RPC
-  broadcast. A lookup that fails is retried on the next tick rather than counted
+  that never answers cannot leave it running indefinitely. Any lookup that
-  as a missing receipt, because a failed lookup says nothing about the
+  answers resets that count.
  transaction; but six failures in a row (60 seconds at the poll cadence) end
  the wait, so an RPC that never answers cannot leave it running indefinitely.
  Any lookup that answers resets that count.
 - **Transitions**:
    - Receipt found → **SuccessTx**
    - A lookup that answers "no receipt" 60 seconds or more after broadcast →
@@ -1951,12 +1842,9 @@ view would leave a wallet one click from deletion.
    - Amount + symbol
    - To: color dot + full address + etherscan link, or for a contract creation
      the same sentence as on WaitTx
-    - Block number + etherscan link
+    - Block number
    - Transaction hash: full hash (tap to copy) + etherscan link
    - "Done" button
 - **Behavior**: As on WaitTx, every etherscan link on the screen opens the
  explorer of the network the transaction was sent on, whichever network is
  active.
 - **Transitions**:
    - "Done" in the approval popup → closes the popup window
    - "Done" otherwise → resets the navigation stack, then → **AddressToken**
@@ -1976,9 +1864,6 @@ view would leave a wallet one click from deletion.
    - Transaction hash section (hidden if broadcast failed before getting hash):
      full hash (tap to copy) + etherscan link
    - "Done" button
 - **Behavior**: As on WaitTx, every etherscan link on the screen opens the
  explorer of the network the transaction was sent on, whichever network is
  active.
 - **Transitions**:
    - "Done" in the approval popup → closes the popup window
    - "Done" otherwise → resets the navigation stack, then → **AddressToken**
@@ -2001,10 +1886,7 @@ view would leave a wallet one click from deletion.
 #### TransactionDetail (`transaction`)
 - **When**: User tapped a transaction row on Home, AddressDetail, or
-  AddressToken. The screen describes the transaction on the network it was sent
+  AddressToken.
  on, whichever network is active: its block, network details, decoded details
  and raw data are read from that network's Blockscout, the one Settings has for
  it, and its etherscan links open that network's explorer.
 - **Elements** (grouped into logical blocks using light well containers; field
  labels are self-explanatory so groups have no headings):
    - "Transaction" heading, "Back" button
@@ -2012,11 +1894,7 @@ view would leave a wallet one click from deletion.
    - Type: transaction classification — one of: Native ETH Transfer, ERC-20
      Token Transfer, Swap, Token Approval, Contract Call, Contract Creation. A
      transfer with a token contract is an ERC-20 Token Transfer whatever symbol
-      the token reports. A call named `execute` or `multicall` is a Swap, here
+      the token reports.
      and on its history row, only when it was sent to one of the Universal
      Router addresses Uniswap publishes for the network it was sent on (see
      Transaction Decoding); sent to any other contract, its history row shows
      the method name and this line reads Contract Call.
    - Status: "Success" or "Failed"
    - From: blockie + color dot + full address (tap to copy) + etherscan link;
      ENS name if available
@@ -2047,18 +1925,13 @@ view would leave a wallet one click from deletion.
    - Contract address input
    - Status line ("Looking up token...", cleared or replaced on failure)
    - Common token quick-pick buttons (top 25 by market cap), which fill the
-      contract address input. Shown on Ethereum Mainnet only, because the
+      contract address input
      bundled token list holds mainnet contracts
    - "Add" button
 - **Transitions**:
    - "Add" (valid contract) → tracks the token, pops the stack, and re-renders
      **AddressDetail**
    - "Add" with a token already tracked, a scam-listed address, or a failed
      contract lookup → flash message, no screen change
    - "Add", then a network switch in Settings before the contract lookup
      answers → nothing is tracked; "The active network changed before the
      lookup finished, so the token was not added." flash message, no screen
      change
    - "Back" → previous screen (AddressDetail)
 #### Settings (`settings`)
@@ -2069,19 +1942,16 @@ view would leave a wallet one click from deletion.
    - Wallets: one row per wallet with its name (tap to rename inline), a
      `[recovery phrase]` button on HD wallets only, and an `[x]` delete button,
      plus a "+ Add wallet" button
-    - Tracked Tokens: one row per token tracked on the active network with an
+    - Tracked Tokens: one row per tracked token with an `[x]` remove button,
-      `[x]` remove button, plus a "+ Add token" button
+      plus a "+ Add token" button
    - Display: "Show tracked tokens with zero balance" checkbox, "UTC
      Timestamps" checkbox, and a Theme selector (System / Light / Dark)
    - Network: network selector (Ethereum Mainnet / Sepolia Testnet). The
      network changes only here, or when the user approves a site's request on
      **NetworkApproval**; either way, switching restores the RPC and Blockscout
      endpoints last used on that network, or that network's defaults if it has
-      none, and the tokens tracked on that network, and sends `chainChanged`
+      none, and sends `chainChanged` with the new chain id to every open tab.
-      with the new chain id to every open tab. A token is tracked only on the
+      Choosing the network already active changes nothing and sends nothing
      network it was added on, because a contract address names a token on one
      network only. Choosing the network already active changes nothing and
      sends nothing
    - Ethereum RPC: endpoint URL input + "Save" button (validated against
      `eth_chainId` before being saved)
    - Blockscout API: endpoint URL input + "Save" button (validated against
@@ -2126,8 +1996,7 @@ view would leave a wallet one click from deletion.
    - `[x]` on a denied site → forgets the refusal, in place; it connects
      nothing and tells the background nothing
    - Ten clicks on the version → reveals the Debug well (no screen change)
-    - "Back" (or Settings gear again) → previous screen (Home); after a network
+    - "Back" (or Settings gear again) → previous screen (Home)
      switch, the stack is cut first (see the top of Screen Map)
 #### ShowRecoveryPhrase (`show-phrase`)
@@ -2310,8 +2179,7 @@ view would leave a wallet one click from deletion.
 #### SettingsAddToken (`settings-addtoken`)
 - **When**: User tapped "+ Add token" in Settings. Tokens added here are tracked
-  across every address on the active network, unlike AddToken which is reached
+  across every address, unlike AddToken which is reached from one address.
  from one address.
 - **Elements**:
    - "Back" button, "Add Token" heading
    - Instruction text
@@ -2320,19 +2188,11 @@ view would leave a wallet one click from deletion.
    - "Or pick from top 100:" dropdown (already-tracked tokens are disabled) +
      "Add selected" button
    - "Or enter contract address:" input, a status line, and an "Add" button
    - The two lists from the bundled token list, "Top tokens:" and "Or pick from
      top 100:", are shown on Ethereum Mainnet only, because that list holds
      mainnet contracts. On any other network the contract address is the only
      add path
 - **Transitions**:
-    - Any of the add paths shown, on success → adds the token and shows an
+    - Any of the three add paths, on success → adds the token and shows an
      "Added SYMBOL" flash message (no screen change)
    - A duplicate, a scam-listed address, or a failed contract lookup → flash
      message, no screen change
    - "Add" by contract address, then a network switch in Settings before the
      lookup answers → nothing is tracked; "The active network changed before
      the lookup finished, so the token was not added." flash message, no screen
      change
    - "Back" → previous screen (Settings)
 #### SiteApproval (`approve-site`)
@@ -2409,28 +2269,17 @@ view would leave a wallet one click from deletion.
    - Site origin (bold, scheme and port included) + "wants to send a
      transaction"
    - Decoded action (if calldata is recognized): action name, token details,
-      amounts, what each swap step spends that the `Amount` line does not give,
+      amounts, steps, deadline (see Transaction Decoding)
      what each `PERMIT2_TRANSFER_FROM` moves and where to, steps, deadline, and
      unless a swap pays only the From address, a `Paid to` line for each other
      address it pays, or saying that a token stays in the router or who it pays
      is unknown (see Transaction Decoding)
    - From: color dot + full address + etherscan link
    - Contract: color dot + full address + etherscan link, token symbol label if
      known; for a contract creation, the same sentence as on WaitTx
-    - Value: amount in ETH (4 decimal places with the nonzero floor, USD in
+    - Value: amount in ETH (4 decimal places, USD in parentheses)
-      parentheses)
+    - Network fee (max): gas limit × fee per gas in ETH (4 decimal places, USD
-    - Network fee (max): gas limit × fee per gas in ETH (4 decimal places with
+      in parentheses), with the gas limit and the fee per gas in gwei below it
      the nonzero floor, USD in parentheses), with the gas limit and the fee per
      gas in gwei below it
    - Network and nonce
    - Raw data: full calldata displayed inline (shown if present)
    - Password input and an error line
    - "Confirm" / "Reject" buttons
 - **Behavior**: Every etherscan link on the screen opens the explorer of the
  network the transaction was populated on, whichever network is active. The
  Value and Network fee lines each give the USD value of the exact amount at the
  price on that network, as on ConfirmTx: none for a testnet transaction or one
  on a chain id that names no network.
 - **Transitions**:
    - "Confirm" (correct password) → decrypts and signs the transaction it was
      shown, exactly as shown, hands the signed transaction to the background to
@@ -2558,9 +2407,8 @@ view would leave a wallet one click from deletion.
 - **Transitions**:
    - "Switch" → closes popup; the background switches the network as
      **Settings** does, restoring the RPC and Blockscout endpoints last used on
-      that network (or that network's defaults if it has none) and the tokens
+      that network (or that network's defaults if it has none), sends
-      tracked on that network, sends `chainChanged` to every open tab, and
+      `chainChanged` to every open tab, and answers the site with success
      answers the site with success
    - "Reject" → closes popup; the site is answered with EIP-1193 code 4001 and
      nothing changes
    - Popup window closed without answering → the same as "Reject"
@@ -3039,234 +2887,24 @@ Currently supported:
  "Swap USDT → ETH"), token addresses, amounts, execution steps, and deadline.
  The swap summary is shown only for a transaction sent to one of the Universal
  Router addresses Uniswap publishes for the network: on TxApproval the network
-  the transaction is for, on TransactionDetail the network it was sent on. The
+  the transaction is for, on TransactionDetail the active network. The same
-  same calldata sent to any other address is shown as raw data. Decodes Permit2,
+  calldata sent to any other address is shown as raw data. Decodes Permit2,
-  V2/V3/V4 swaps, wrap/unwrap, and balance checks. A V3 swap step's path is read
+  V2/V3/V4 swaps, wrap/unwrap, and balance checks. A V4 swap action is read only
-  as the router reads it: a `V3_SWAP_EXACT_IN` path runs from the token it
+  in the parameter shape deployed on mainnet and Sepolia, not in the newer one
-  spends to the token it buys, and a `V3_SWAP_EXACT_OUT` path from the token it
+  on `v4-periphery` `main`, which adds a `minHopPriceX36` field. An action in
-  buys to the token it spends, so that step's input token is its path's last
+  any other shape is not read, and its step is listed as
-  token and its output token the first. The router reads a path as one token
+  `V4 Swap (could not be decoded)`. Each step is named by its command type,
-  address followed by whole hops of a 3-byte fee and a token address, and
+  which the decoder reads from the command byte with the mask the router at that
-  ignores any bytes after the last hop, so the decoder does not read a path with
+  address uses: `0x1f` for `UniversalRouterV1`, `0x3f` for
  such bytes. A V4 swap action is read only in the parameter shape deployed on
  mainnet and Sepolia, not in the newer one on `v4-periphery` `main`, which adds
  a `minHopPriceX36` field. An action in any other shape is not read, and its
  step is listed as `V4 Swap (could not be decoded)`. Each step is named and
  read as the command that the release of the router at that address runs for
  its command type, as that release's `contracts/libraries/Commands.sol` names
  it. The decoder reads the type from the command byte with the mask that router
  uses: `0x1f` for `UniversalRouterV1`, `0x3f` for
  `UniversalRouterV1_2_V2Support` and `UniversalRouterV2`, and `0x7f` for
  `UniversalRouterV2_1_1` and `UniversalRouterV2_1_2`. The allow-revert flag
-  (`0x80`) therefore does not change the command a step is read as. Releases run
+  (`0x80`) therefore does not change a step's name. The decoder does not read
-  different commands for some types: on `UniversalRouterV1` and
+  the commands inside an `EXECUTE_SUB_PLAN` (`0x21`) step, and wherever that
-  `UniversalRouterV1_2_V2Support`, `0x10` to `0x13` are NFT commands, where the
+  step stands they may spend the user's tokens or pay the user. That step is
-  later routers run `V4_SWAP`, `V3_POSITION_MANAGER_PERMIT`,
+  listed as `Execute Sub-Plan (its steps are not shown)`, and whatever the other
-  `V3_POSITION_MANAGER_CALL` and `V4_INITIALIZE_POOL`. The decoder does not read
+  steps state, the summary names no swap direction, `Token In` and `Token Out`
-  those routers' NFT commands, and lists each by its name there, for example
+  read `Unknown (could not be decoded)`, and there is no `Amount` or
-  `Seaport` for `SEAPORT` (`0x10` on `UniversalRouterV1`). A type a release
+  `Min. received` line.
  names no command for is listed by its number, for example `Command 0x0e` on
  `UniversalRouterV1`, which has no `BALANCE_CHECK_ERC20` and reverts on it. The
  router reverts the whole transaction when a step fails, unless the step's
  command byte has that flag set and its command is one the router lets fail, as
  each release's `contracts/base/Dispatcher.sol` shows: on `UniversalRouterV2`,
  `UniversalRouterV2_1_1` and `UniversalRouterV2_1_2`, `PERMIT2_PERMIT`,
  `PERMIT2_PERMIT_BATCH`, `BALANCE_CHECK_ERC20`, `V3_POSITION_MANAGER_PERMIT`,
  `V3_POSITION_MANAGER_CALL`, `V4_INITIALIZE_POOL`, `V4_POSITION_MANAGER_CALL`
  and `EXECUTE_SUB_PLAN`; on `UniversalRouterV1_2_V2Support`,
  `BALANCE_CHECK_ERC20`, `EXECUTE_SUB_PLAN` and its NFT market calls and NFT
  owner checks; on `UniversalRouterV1`, its NFT market calls and NFT owner
  checks. Such a step may then fail while the transaction goes on to the next
  step, and it is listed with ` (allowed to fail)` after its name, for example
  `Balance Check (allowed to fail)`. On every other command, among them each V2,
  V3 and V4 swap and each payment of ETH or an ERC-20 token, the flag has no
  effect: the step succeeds or the whole transaction reverts, so the step reads
  as it does without the flag. A `BALANCE_CHECK_ERC20` the router lets fail
  guarantees nothing, so it is read as one whose `minBalance` is zero. Only the
  routers with the `0x7f` mask have `PAY_PORTION_FULL_PRECISION` (`0x07`),
  listed as `Pay Portion (Full Precision)`, and `ACROSS_V4_DEPOSIT_V3` (`0x40`),
  listed as `Across Bridge Deposit`; the other routers revert on `0x07`, and it
  is listed there as `Command 0x07`. The decoder does not read the commands
  inside an `EXECUTE_SUB_PLAN` (`0x21`) step, and wherever that step stands they
  may spend the user's tokens or pay the user. That step is listed as
  `Execute Sub-Plan (its steps are not shown)`, and whatever the other steps
  state, the summary names no swap direction, `Token In` and `Token Out` read
  `Unknown (could not be decoded)`, and there is no `Amount` or `Min. received`
  line. Each swap step, `SWEEP`, `WRAP_ETH`, `UNWRAP_WETH`, `TRANSFER`,
  `PAY_PORTION`, `PAY_PORTION_FULL_PRECISION`, `PERMIT2_TRANSFER_FROM` (which
  moves the user's own tokens) and V4 `TAKE` and `TAKE_PORTION` names the
  address it pays, and `TAKE_ALL` pays the transaction's sender. The router
  reads `address(1)` as the transaction's sender, and `address(2)` as the router
  itself, which holds what it is paid until a later step pays it out; a payment
  to the router, as `address(2)` or by its own address, is not counted as paid
  out. `UniversalRouterV1` alone pays a `PERMIT2_TRANSFER_FROM` to `address(1)`
  or `address(2)` as those addresses, and the decoder names them. A
  `PERMIT2_TRANSFER_FROM` into the router is named with the amount it moves,
  because the decoder does not check that later steps spend all of it.
  `ACROSS_V4_DEPOSIT_V3` pays the bridge, which pays the deposit's recipient on
  another network and refunds a deposit nobody fills to its depositor; the
  router passes both on as written, so `address(1)` and `address(2)` there are
  addresses, and each that is not the transaction's sender is named. A
  `BALANCE_CHECK_ERC20` pays nobody: the router checks that its owner holds at
  least `minBalance` of its token, and reads the owner as written, so
  `address(1)` and `address(2)` there are addresses too. A check of any address
  but the transaction's sender's says nothing about what the user receives: it
  sets neither `Token Out` nor the minimum, and it is listed as
  `Balance Check (of another address)`. A check whose input does not decode,
  such as one whose owner word has a nonzero top byte (the router reads the
  owner from the word's last 20 bytes), likewise sets neither, and it is listed
  as `Balance Check (could not be decoded)`. When a swap step, `TAKE` or
  `TAKE_PORTION` pays the router any token, the swap's output or another, a
  `WRAP_ETH` pays it WETH, or an `UNWRAP_WETH` into the router turns WETH a step
  paid it into ETH, that token stays in the router unless a later step pays out
  or spends all the router holds of it: a `SWEEP` of that token to anyone but
  the router, an `UNWRAP_WETH` when it is WETH, a `WRAP_ETH` of
  `CONTRACT_BALANCE` when it is ETH, a `TRANSFER` of `CONTRACT_BALANCE`, a
  `PAY_PORTION` of 10,000 bips or a `PAY_PORTION_FULL_PRECISION` of 1e18 of that
  token to anyone but the router, an `ACROSS_V4_DEPOSIT_V3` of
  `CONTRACT_BALANCE` of that token, or of ETH when it sets `useNative`, or a V2
  or V3 exact-in swap step or V4 `SETTLE` that pays `CONTRACT_BALANCE` of that
  token from the router (`payerIsUser` false). V2 and V3 exact-in swap steps and
  V4 `SETTLE`s that pay WETH from the router also spend all the WETH a
  `WRAP_ETH` paid it once together they spend the amount the `WRAP_ETH` states,
  as a swap paid in ETH does, but only when that amount is not
  `CONTRACT_BALANCE` and the router held no WETH from an earlier step when the
  `WRAP_ETH` ran: after two `WRAP_ETH`s of 0.5 ETH into the router, a swap of 1
  WETH from it reads as leaving the WETH there. A V2 or V3 exact-out step paid
  from the router spends an amount the calldata does not state, at most its
  `amountInMax`, so the decoder counts it as spending nothing the router holds.
  A `SETTLE` of `OPEN_DELTA` (zero), and a `SETTLE_ALL`, pay only what the step
  still owes of their token when they run. The decoder takes that to be the
  amounts the step's swap actions state they spend of that token only when every
  action in the step could be read, every swap action names the token it spends
  and the token it buys (a swap action with an empty path swaps nothing), the
  `SETTLE` or `SETTLE_ALL` is the step's only `SETTLE` or `SETTLE_ALL` of that
  token and comes after every swap action, no swap action buys that token, no
  `TAKE`, `TAKE_ALL` or `TAKE_PORTION` in the step takes it (a `TAKE` of a
  stated amount adds to what the step owes), and the swap actions that spend it
  state a quantity together; otherwise it does not know the amount, and such a
  `SETTLE` from the router counts as spending nothing. So the rest of a V4
  `SETTLE` of more than its swap spends, taken to the router, the WETH of a
  `WRAP_ETH`, and a token a swap pays the router on the way to the output, each
  stays in the router when later steps do not spend all of it, where anyone can
  take it in a later transaction. The router sends ETH as written, so a
  `TRANSFER` of `CONTRACT_BALANCE` of ETH always reverts and pays out nothing. A
  step paying a token to the V2 pair that the very next step spends, as a V2
  exact-in of that token whose `amountIn` is `ALREADY_PAID` (zero) or
  `CONTRACT_BALANCE`, is a hop, not a payout: Uniswap's mixed routes pay the
  next V2 pair directly, and the router enforces that swap's own minimum. The
  decoder checks that the address paid is that pair, deriving it from the V2
  factory and pair init code hash the network's routers were deployed with and
  the first two tokens of that step's path; a payment to any other address is
  named. (Sepolia's `UniversalRouterV1_2_V2Support` was deployed with
  placeholders for both values, so no V2 swap step can succeed on that router.)
  Every other payment counts, in whichever step and of whatever token, a share
  of the output included: an interface fee paid to another address by
  `PAY_PORTION`, `TRANSFER` or `TAKE_PORTION` is named, and the minimum reads
  `Min. paid out`, because the swap's minimum includes the fee. The minimum
  reads `Min. received` only when some step pays the transaction's sender (the
  From address on TxApproval, the sender the explorer reports on
  TransactionDetail) and no `Paid to` line is shown. `Paid to` lines after
  `Token Out` name each other address paid; one reads
  `The bridge, which pays the deposit's recipient on another network` for a
  bridge deposit; one reads, for example,
  `The router, 2000.0000 USDT from the sender (later steps may not spend all of it)`
  for each move into the router, followed by a `Token moved into the router`
  line that gives the moved token's address as the `Token In` line does; one
  reads `The router, where it stays (no later step pays it out)` for each token
  that stays in the router, followed, for any token but the output, by a
  `Token moved into the router` line giving that token in the same way (ETH by
  name); and one more reads `Unknown (could not be decoded)` when a step that
  may pay an address went unread. When no step pays anyone, a single line reads
  `Unknown (not named in the calldata)`. Wherever there is a `Paid to` line, the
  minimum reads `Min. paid out`. The `Amount` line gives the total the steps
  take of `Token In`, from the step that sets the input side on: the first V2 or
  V3 exact-in or exact-out, `WRAP_ETH` or V4 swap step that names an input token
  or amount. A V4 step with a swap action sets the input side when no earlier
  step set it, even when it names neither (see Display Consistency). That step
  counts its own amount, whoever pays it: a V2 or V3 exact-out step its
  `amountInMax`, and a V4 step what it takes of its input token from the user's
  wallet, as below, or, when the user pays it none of that token, the `amountIn`
  of the swap action that spends it. Each later V2 or V3 exact-in or exact-out
  step whose `payerIsUser` is true takes its amount, found in the same way, from
  the user's wallet. Every V4 step, with a swap action or without, takes from
  the user's wallet what its `SETTLE`s paid by the user (`payerIsUser` true) and
  its `SETTLE_ALL`s pay, for each token on its own; what the step that sets the
  input side takes of any other token counts as a later step's take. A `SETTLE`
  of any amount but `OPEN_DELTA` pays that amount, and a `SETTLE` of
  `OPEN_DELTA` or a `SETTLE_ALL` pays what the step owes, as above. So a V4 step
  that swaps 400 USDT, with a `SETTLE` of 5,000 USDT paid by the user and the
  rest taken to another address, reads `5000.0000 USDT`. A later step paid from
  the router spends what the router holds and takes nothing, and so does a V2
  exact-in whose `amountIn` is `ALREADY_PAID`. A later take of `Token In` is
  added to the total while both are quantities: a V3 exact-in of 600 USDT and a
  V2 exact-in of 400 USDT, both paid by the user, read `1000.0000 USDT`. When
  the decoder does not know a take's amount, the total is not known and there is
  no `Amount` line. `Token In` is the token of the last `PERMIT2_PERMIT` the
  decoder reads, when there is one. Its amount, `Unlimited` included, stands as
  the `Amount` figure in place of the total only in the plain shape of Uniswap's
  own routes: it is the only `PERMIT2_PERMIT`, its spender is the router, the
  router may not let it fail, no step before it takes its token or a token the
  decoder does not know, and the decoder reads every step after it in full.
  Permit2 then lets the router take no more of the token than that amount, so
  the permit covers every take of it. A step the decoder does not read in full
  may raise what Permit2 lets the router take, as a `PERMIT2_PERMIT_BATCH` can:
  a command the decoder does not read (listed at the end of this section), a
  step whose input it cannot read, in whole or in part, and a step it fails on.
  In any other case the line gives the total, as with no permit. When the step
  that sets the input side spends a token other than the permit's, or one the
  decoder does not know, its amount gets lines of its own, unless it states no
  amount and the user pays it none of its input token, and the total has no
  figure to start from: unless the permit's amount stands there is no `Amount`
  line, and each take of the permit's token gets lines of its own. Each take the
  total does not count gives three lines after the `Amount` line (after
  `Token In` when there is none): one of a token other than `Token In`; one of
  `Token In` after an amount that is not a quantity (a V4 open delta,
  `ALREADY_PAID`, which keep their wording on the `Amount` line, or no stated
  amount, as of a V4 exact-out step); and one whose amount the decoder does not
  know. When the step that sets the input side states no amount, the user pays
  it some of its input token, and there is no `Amount` line, that step gets them
  too whenever another take's lines give a figure, or a `PERMIT2_TRANSFER_FROM`
  of its token gives one, on the lines below or, into the router, on its
  `Paid to` line, so that figure cannot read as all that leaves. When it states
  no amount and the user pays it none of its input token, as when the router
  pays it, that step takes none of that token from the user's wallet and never
  gets them, with a permit or without. They come in step order, the step that
  sets the input side first when it has them: `Moved from the sender`, its
  amount, worded as the `Amount` line words one, or
  `Unknown (could not be decoded)` when the decoder does not know it;
  `Token moved`, giving the token's address as the `Token In` line does; and
  `Moved to`, which reads `The swap step that spends it`. A token the decoder
  does not know gives the `Moved from the sender` line alone. A step may also
  take from the user's wallet what the decoder did not read: a V4 step whose
  input or one of whose `SETTLE`s or `SETTLE_ALL`s it cannot read, which the
  router still runs; a V2 or V3 exact-in or exact-out step or a
  `PERMIT2_TRANSFER_FROM` whose input it cannot read, such as a V3 step whose
  path is shorter than one token address or has bytes after its last hop; every
  `PERMIT2_TRANSFER_FROM_BATCH`; every `EXECUTE_SUB_PLAN`, wherever it stands;
  and every step it fails on. Each such step gives one `Moved from the sender`
  line among those, reading `Unknown (could not be decoded)`. That line, or any
  line for a token the decoder does not know, leaves no `Amount` line, whose
  figure might be too low, and such a step before a `PERMIT2_PERMIT` keeps the
  permit's amount from standing. Then each `PERMIT2_TRANSFER_FROM` but one into
  the router, in step order, gives three lines: `Moved from the sender`, the
  amount it moves, for example `1000000.0000 USDT`; `Token moved`, giving the
  token's address as the `Token In` line does; and `Moved to`, which reads
  `The V2 pair the next swap spends` for a hop and `The sender` for `address(1)`
  on every router but `UniversalRouterV1`, and otherwise gives the address. A
  move into the router needs none of them, because its `Paid to` line and
  `Token moved into the router` line already give the amount, the token and
  where it goes, and so its amount is shown once. These lines change neither the
  `Paid to` lines nor the minimum's label. A step goes unread when its recipient
  does not decode as an address, when it is a V3 swap step whose path is shorter
  than one token address or has bytes after its last hop, or when it is a
  command the decoder does not read: every command other than `PERMIT2_PERMIT`,
  `PERMIT2_TRANSFER_FROM`, `V2_SWAP_EXACT_IN`, `V2_SWAP_EXACT_OUT`,
  `V3_SWAP_EXACT_IN`, `V3_SWAP_EXACT_OUT`, `V4_SWAP`, `SWEEP`, `TRANSFER`,
  `PAY_PORTION`, `PAY_PORTION_FULL_PRECISION`, `ACROSS_V4_DEPOSIT_V3`,
  `WRAP_ETH`, `UNWRAP_WETH` and `BALANCE_CHECK_ERC20`
  (`PERMIT2_TRANSFER_FROM_BATCH`, `EXECUTE_SUB_PLAN` and the NFT commands among
  them), or a type its release names no command for.
 ### Non-Goals Forever
@@ -306,14 +306,7 @@ enter your password and click "Confirm" to authorize it. Message and typed-data
 signature requests work the same way, with a "Sign" button, and also require
 your password.
-A connected site can also ask to switch the wallet's network. A popup shows the
+If the requesting site's domain is on the phishing blocklist, all three approval
 site's origin, the current network and the requested network. Nothing changes
 unless you click "Switch"; clicking "Reject" or closing the popup leaves
 everything as it was. Switching works exactly as it does in Settings, and
 changes the network for the whole wallet and for every site, not only for the
 one that asked.
 If the requesting site's domain is on the phishing blocklist, all four approval
 screens show a red phishing warning before you decide.
 You can manage site permissions in Settings. Allowed and denied sites can be
@@ -385,8 +378,7 @@ Click the gear icon on the home screen to access settings:
 - **Display**: Toggle whether tracked tokens with zero balance are shown, switch
  timestamps to UTC, and choose the theme (System, Light, or Dark).
 - **Network**: Switch between Ethereum Mainnet and Sepolia Testnet. Switching
-  restores the RPC and Blockscout endpoints you last used on that network, or
+  resets the RPC and Blockscout endpoints to that network's defaults.
  that network's defaults if you have not used it before.
 - **Ethereum RPC**: Change the Ethereum node endpoint. Default is a public RPC.
  You can use your own node for maximum privacy.
 - **Blockscout API**: Change the Blockscout instance used for token balances and
@@ -13,11 +13,6 @@
        "fmt": "prettier --write .",
        "fmt-check": "prettier --check ."
    },
    "jest": {
        "setupFiles": [
            "<rootDir>/tests/support/navigatorLocks.js"
        ]
    },
    "devDependencies": {
        "@eslint/js": "10.0.1",
        "@tailwindcss/cli": "4.3.1",
@@ -16,20 +16,17 @@
 //                     across any number of awaits and no concurrent work can
 //                     move it.
 //   updateState(fn)   read fresh, apply fn to that fresh record, write it
-//                     back — all holding the lock every write of the stored
+//                     back — all inside a queue, so two background writes
-//                     record takes, so no other write lands in between, by
+//                     never interleave, and the read is one storage round trip
-//                     the background or by any page except a page in a
+//                     ahead of the write rather than a page lifetime ahead of
-//                     Firefox private window (README, "Stored state and its
+//                     it (which is what made the popup's saveState() need a
 //                     version"). The read is one storage round trip ahead of
 //                     the write rather than a page lifetime ahead of it
 //                     (which is what made the popup's saveState() need a
 //                     per-field merge against a baseline at all).
 //
 // A handler that must both read and write therefore does its network work
 // against a snapshot it owns, and applies the RESULT inside updateState().
 // It never publishes an object other in-flight work is holding.
-const { storageGet, storageSet, withLock } = require("../shared/browserApi");
+const { storageGet, storageSet } = require("../shared/browserApi");
 const { normalizePersisted } = require("../shared/persistedState");
 const {
    STATE_SCHEMA_VERSION,
@@ -54,6 +51,11 @@ async function getState() {
    return normalizePersisted(result.autistmask);
 }
 // Serializes the read-modify-write turns below. Two of them interleaved would
 // each read before the other wrote, and the second write would carry the first
 // one's fields back to their pre-turn values.
 let updateQueue = Promise.resolve();
 async function updateStateOnce(mutate) {
    const s = await getState();
    await mutate(s);
@@ -68,22 +70,27 @@ async function updateStateOnce(mutate) {
 // Apply `mutate` to a record read fresh from storage and write the result
 // back. `mutate` receives a detached, normalized profile and mutates it in
-// place; it may be async, but it must not do anything slow. The write is the
+// place; it may be async, but it must not do anything slow — the window
-// WHOLE record, which is safe only because the lock (withLock() in
+// between the read and the write is the window in which another context's
-// src/shared/browserApi.js) is held from the read to the write: two
+// write is lost, and keeping it to one storage round trip is what makes a
-// background turns, or a turn and a page's save, never interleave
+// whole-record write safe here. Concretely: the write is the WHOLE record, so
-// (https://git.eeqj.de/sneak/AutistMask/issues/641). Every page's save waits
+// a popup write that lands inside that window is reverted, in every field, by
-// while it is held, except a page in a Firefox private window, which Firefox
+// the record this turn read before it. That is accepted because the window is
-// gives locks of its own (README, "Stored state and its version").
+// one round trip long and the popup is not writing while the worker is;
 // widening it is what would make it a real hazard.
 //
 // `mutate` must also not call updateState() itself, directly or through
-// anything it awaits: the inner turn waits for the lock the outer one holds,
+// anything it awaits: the queue is strictly serial, so the inner turn waits on
-// and the outer one is waiting on the inner one. That deadlocks every write of
+// the outer one, which is waiting on the inner one. That deadlocks the whole
-// the stored record, not just the caller. Mutate the record you were handed.
+// background, not just the caller. Mutate the record you were handed.
 //
 // Resolves with the record that was written.
 function updateState(mutate) {
-    return withLock("autistmask", () => updateStateOnce(mutate));
+    const turn = updateQueue.then(() => updateStateOnce(mutate));
    // The queue must advance even when a turn rejects, or every update after
    // it queues behind a promise that never settles.
    updateQueue = turn.catch(() => {});
    return turn;
 }
 module.exports = { getState, updateState };
@@ -90,7 +90,7 @@
                <div id="add-wallet-section-mnemonic">
                    <!-- The die button shares the instruction's row: on a row
                         of its own it pushes Import below the fold at
-                         396x600. -->
+                         360x600. -->
                    <div class="mb-2 flex justify-between items-start gap-2">
                        <p>
                            Enter your 12 or 24 word recovery phrase below, or
@@ -212,7 +212,7 @@
                    />
                </div>
                <!-- The error line sits beside Import, not above it: at
-                     396x600 the button already starts near the bottom of
+                     360x600 the button already starts near the bottom of
                     the popup, and a line of its own would push it below
                     the fold. The longest error fits on one line here. -->
                <div class="flex items-center gap-2">
@@ -664,20 +664,6 @@
                    id="confirm-errors"
                    class="mb-2 border border-border border-dashed p-2 invisible min-h-[1.25rem]"
                ></div>
                <!-- Its sentence names the token, or why the token's balance
                is unknown, so show() in confirmTx.js sets it. -->
                <div
                    id="confirm-balance-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
                ></div>
                <div
                    id="confirm-balance-read-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
                >
                    Your balance could not be read from the network, so this
                    transaction cannot be checked against it. Please go back and
                    try again.
                </div>
                <div
                    id="confirm-amount-fee-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
@@ -697,33 +683,6 @@
                    id="confirm-fee-unknown-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
                ></div>
                <!-- Shown when Sign & Send refuses a send for its network, for
                a From address the selected wallet does not hold, or for its
                gas limit or fee. Each holds its space from the first paint, so
                the refusal moves nothing. -->
                <div
                    id="confirm-network-changed-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
                >
                    The active network changed after this transaction was
                    reviewed, so it was not sent. Please go back and review it
                    again.
                </div>
                <div
                    id="confirm-from-address-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
                >
                    The selected wallet does not hold the From address above, so
                    nothing was sent. Please go back and send again.
                </div>
                <div
                    id="confirm-fee-bound-error"
                    class="mb-2 border border-border border-dashed p-2 text-xs invisible"
                >
                    The gas limit or fee the RPC endpoint quoted for this
                    transaction is more than this wallet will sign for, so it
                    was not sent. Please go back and try again.
                </div>
                <div class="mb-2">
                    <label class="block mb-1 text-xs">Password</label>
                    <input
@@ -879,7 +838,7 @@
                    id="add-token-info"
                    class="text-xs text-muted mb-2 min-h-[1.25rem] invisible"
                ></div>
-                <div id="add-token-common" class="mb-2">
+                <div class="mb-2">
                    <label class="block mb-1 text-xs text-muted"
                        >Or pick a common token:</label
                    >
@@ -1363,39 +1322,36 @@
                <h2 class="font-bold mb-2">Add Token</h2>
                <p class="text-xs text-muted mb-3">
                    Pick a common token or enter a contract address manually.
                    Common tokens are offered on Ethereum Mainnet only.
                </p>
-                <div id="settings-addtoken-common">
+                <!-- top 10 quick-pick buttons -->
-                    <!-- top 10 quick-pick buttons -->
+                <div class="mb-3">
-                    <div class="mb-3">
+                    <label class="block mb-1 text-xs text-muted"
-                        <label class="block mb-1 text-xs text-muted"
+                        >Top tokens:</label
-                            >Top tokens:</label
+                    >
-                        >
+                    <div
-                        <div
+                        id="settings-addtoken-top10"
-                            id="settings-addtoken-top10"
+                        class="flex flex-wrap gap-1"
-                            class="flex flex-wrap gap-1"
+                    ></div>
-                        ></div>
+                </div>
                    </div>
-                    <!-- top 100 dropdown -->
+                <!-- top 100 dropdown -->
-                    <div class="mb-3">
+                <div class="mb-3">
-                        <label class="block mb-1 text-xs text-muted"
+                    <label class="block mb-1 text-xs text-muted"
-                            >Or pick from top 100:</label
+                        >Or pick from top 100:</label
-                        >
+                    >
-                        <select
+                    <select
-                            id="settings-addtoken-select"
+                        id="settings-addtoken-select"
-                            class="border border-border p-1 w-full font-mono text-sm bg-bg text-fg"
+                        class="border border-border p-1 w-full font-mono text-sm bg-bg text-fg"
-                        >
+                    >
-                            <option value="">-- select --</option>
+                        <option value="">-- select --</option>
-                        </select>
+                    </select>
-                        <button
+                    <button
-                            id="btn-settings-addtoken-select"
+                        id="btn-settings-addtoken-select"
-                            class="border border-border px-2 py-1 mt-1 hover:bg-fg hover:text-bg cursor-pointer"
+                        class="border border-border px-2 py-1 mt-1 hover:bg-fg hover:text-bg cursor-pointer"
-                        >
+                    >
-                            Add selected
+                        Add selected
-                        </button>
+                    </button>
                    </div>
                </div>
                <!-- manual contract address -->
@@ -220,7 +220,7 @@ async function widenApprovalWindow() {
 async function init() {
    // First, before anything can save: showView() saves on every navigation
    // without awaiting, so a save that fails from here on has somewhere to be
-    // reported rather than reaching only the console
+    // reported rather than being swallowed by the save queue
    // (https://git.eeqj.de/sneak/AutistMask/issues/362). Registered ahead of
    // the approval-window branch below too, since that window saves as well.
    //
@@ -13,7 +13,6 @@
 // cannot be required outside a browser.
 const { RESTORABLE_VIEWS } = require("../shared/restorableViews");
 const { SUPPORTED_CHAIN_IDS } = require("../shared/networks");
 // The views this page load has rendered.
 //
@@ -38,11 +37,9 @@ function markViewRendered(view) {
    if (view) renderedViews.add(view);
 }
-// Begin a fresh page-load scope. The popup gets one by being loaded, and
+// Begin a fresh page-load scope. The popup gets one by being loaded; the
 // asks for one when the user switches the network, because every screen
 // then on the page shows the previous network (views/settings.js); the
 // unit tests, which simulate several page loads against one module
-// instance, ask for one too.
+// instance, ask for one.
 function resetRenderedViews() {
    renderedViews.clear();
 }
@@ -127,33 +124,25 @@ function isRenderableDecoded(value) {
 }
 // The pending transaction confirmTx.show() renders: `token` reaches
-// renderAddressHtml() when it is not "ETH", `from`/`to` reach
+// renderAddressHtml() when it is not "ETH", and `from`/`to` reach
-// addressTitle(), makeBlockie() and getLocalWarnings(), and `amount` reaches
+// addressTitle(), makeBlockie() and getLocalWarnings().
 // truncateAmountNeverZero(), which splits it. `chainId`, which show() fills in
 // when it is absent, picks the network whose explorer the address links open,
 // so it has to name one.
 function isRenderablePendingTx(value) {
    return (
        isRecord(value) &&
        isText(value.token) &&
        isAddressText(value.from) &&
-        isAddressText(value.to) &&
+        isAddressText(value.to)
        isText(value.amount) &&
        (!value.chainId || SUPPORTED_CHAIN_IDS.has(value.chainId))
    );
 }
 // The stored transaction transactionDetail.render() shows. contractAddress is
 // optional on an ETH transfer, and reaches addressDotHtml() when it is there.
 // `chainId` picks the network whose explorer the links open and whose
 // Blockscout the transaction is read from, so it has to name one.
 function isRenderableTx(value) {
    return (
        isRecord(value) &&
        isAddressText(value.from) &&
        isAddressText(value.to) &&
-        (!value.contractAddress || isAddressText(value.contractAddress)) &&
+        (!value.contractAddress || isAddressText(value.contractAddress))
        SUPPORTED_CHAIN_IDS.has(value.chainId)
    );
 }
@@ -205,19 +194,11 @@ function renderView(view, state, views) {
            if (!data.hash) return false;
            if (!isAddressText(data.to)) return false;
            if (!isRenderableDecoded(data.decoded)) return false;
            // `chainId` picks the network whose explorer the links open, so
            // when it is there it has to name one. Likewise on error-tx.
            if (data.chainId && !SUPPORTED_CHAIN_IDS.has(data.chainId)) {
                return false;
            }
            views.txStatus.renderSuccess();
            return true;
        case "error-tx":
            if (!data.message) return false;
            if (!isAddressText(data.to)) return false;
            if (data.chainId && !SUPPORTED_CHAIN_IDS.has(data.chainId)) {
                return false;
            }
            views.txStatus.renderError();
            return true;
        default:
@@ -232,10 +213,9 @@ function renderView(view, state, views) {
 // in the two cases where the view is known to be on the page already:
 //
 //   - It is not one the popup renders from persisted state. The restored
-//     stack is filtered against RESTORABLE_VIEWS, and a network switch cuts
+//     stack is filtered against RESTORABLE_VIEWS, so such a view can only
-//     it the same way (views/settings.js), so such a view can only be on the
+//     be on the stack from this page load, where forward navigation
-//     stack from this page load, where forward navigation rendered it on the
+//     rendered it on the way in.
 //     way in.
 //   - This page load has rendered it. Re-rendering would re-fetch and
 //     clobber what it holds; Home is rendered anyway, see above.
 //
@@ -1,6 +1,6 @@
 const { $, showView, showFlash, escapeHtml, goBack } = require("./helpers");
 const { getTopTokens } = require("../../shared/tokenList");
-const { state, saveState, currentNetwork } = require("../../shared/state");
+const { state, saveState } = require("../../shared/state");
 const { lookupTokenInfo } = require("../../shared/balances");
 const { isScamAddress } = require("../../shared/scamlist");
 const { log } = require("../../shared/log");
@@ -9,12 +9,6 @@ function show() {
    $("add-token-address").value = "";
    $("add-token-info").textContent = "";
    $("add-token-info").style.visibility = "hidden";
    // The bundled list holds Ethereum Mainnet contracts, which name no token
    // on any other network.
    $("add-token-common").classList.toggle(
        "hidden",
        state.networkId !== "mainnet",
    );
    const list = $("common-token-list");
    list.innerHTML = getTopTokens(25)
        .map(
@@ -52,9 +46,6 @@ function init(ctx) {
        infoEl.textContent = "Looking up token...";
        infoEl.style.visibility = "visible";
        log.debugf("Looking up token contract", contractAddr);
        // The network the lookup asks, which Settings may switch away from
        // before it answers, as for a transaction in confirmTx.js.
        const chainId = currentNetwork().chainId;
        try {
            const info = await lookupTokenInfo(
                contractAddr,
@@ -62,15 +53,6 @@ function init(ctx) {
                state.networkId,
                ctx.pageClosed,
            );
            // A contract address names a token on one network only, so an
            // answer after a switch is not added to the new network's list.
            if (currentNetwork().chainId !== chainId) {
                showFlash(
                    "The active network changed before the lookup finished," +
                        " so the token was not added.",
                );
                return;
            }
            log.infof("Adding token", info.symbol, contractAddr);
            state.trackedTokens.push({
                address: contractAddr,
@@ -11,7 +11,6 @@ const {
    onViewLeave,
    formatFee,
    tokenLabel,
    tokenSourcesByChainId,
 } = require("./helpers");
 const { state, saveState, currentNetwork } = require("../../shared/state");
 const {
@@ -58,15 +57,9 @@ const { notify, runtimeApi, sendMessage } = require("../../shared/browserApi");
 const erc20Iface = new Interface(ERC20_ABI);
-// The link opens the explorer of the network with `chainId`, or of the active
+function approvalAddressHtml(address) {
 // network when none is given. A chain id that names no network has no
 // explorer, so the address is drawn without a link.
 function approvalAddressHtml(address, chainId) {
    const title = addressTitle(address, state.wallets);
-    if (chainId && !networkByChainId(chainId)) {
+    return renderAddressHtml(address, { title });
        return renderAddressHtml(address, { title, noLink: true });
    }
    return renderAddressHtml(address, { title, chainId });
 }
 // The amount line for a decoded ERC-20 call. With a known scale it is the
@@ -86,18 +79,19 @@ function tokenAmountText(rawAmount, decimals, symbol) {
    };
 }
-// Try to decode calldata sent from `fromAddress` to `toAddress` on the network
+// Try to decode calldata sent to `toAddress` on the network with chain id
-// with chain id `chainId`, using known ABIs.
+// `chainId`, using known ABIs.
 // Returns { name, description, details } or null.
-function decodeCalldata(data, toAddress, chainId, fromAddress) {
+function decodeCalldata(data, toAddress, chainId) {
    if (!data || data === "0x" || data.length < 10) return null;
-    // Where a token's name and scale are looked for, for every decoder below:
+    // Where a token's scale is looked for, for every decoder below: the ERC-20
-    // what the wallet knows of the tokens on the network with `chainId`, which
+    // amount line and the swap's Amount and Min. received lines resolve it the
-    // need not be the active one. The ERC-20 amount line and the swap's Amount
+    // same way, and refuse to format the same way when it is nowhere.
-    // and Min. received lines resolve the scale the same way, and refuse to
+    const decimalsSources = {
-    // format the same way when it is nowhere.
+        trackedTokens: state.trackedTokens,
-    const decimalsSources = tokenSourcesByChainId(chainId);
+        wallets: state.wallets,
    };
    // Try ERC-20 (approve / transfer)
    try {
@@ -197,7 +191,6 @@ function decodeCalldata(data, toAddress, chainId, fromAddress) {
        toAddress,
        chainId,
        decimalsSources,
        fromAddress,
    );
    if (routerResult) return routerResult;
@@ -231,11 +224,10 @@ function showTxFee(approvedTx) {
    const feePerGas = BigInt(approvedTx.maxFeePerGas || approvedTx.gasPrice);
    // Through formatFee(), as the confirmation screen's fee is, so the same
    // fee reads the same on both. In the native currency of the network shown
-    // above, and at the price on it, as the value is.
+    // above, as the value is.
    $("approve-tx-fee").textContent = formatFee(
        gasLimit * feePerGas,
        nativeCurrencyByChainId(approvedTx.chainId),
        approvedTx.chainId,
    );
    let detail =
@@ -268,7 +260,10 @@ function showTxApproval(details) {
    const toAddr = approvedTx.to;
    const ethValue = formatEther(approvedTx.value || "0");
-    const sources = tokenSourcesByChainId(approvedTx.chainId);
+    const sources = {
        trackedTokens: state.trackedTokens,
        wallets: state.wallets,
    };
    // Build txInfo for status screens
    pendingTxDetails = {
@@ -282,12 +277,11 @@ function showTxApproval(details) {
    // If this is an ERC-20 call, try to extract the real recipient and amount.
    // Decoded for the network the transaction is for, which the Network line
-    // names, and the address the From line names.
+    // names.
    const decoded = decodeCalldata(
        approvedTx.data,
        toAddr || "",
        approvedTx.chainId,
        details.approvedFrom,
    );
    if (decoded && decoded.details) {
        // The asset the status summary is counted in: an ERC-20 call's Token
@@ -345,35 +339,27 @@ function showTxApproval(details) {
        };
    }
    // Every address link on this screen opens the explorer of the network the
    // transaction is for, which the Network line names, whichever network is
    // active.
    $("approve-tx-origin").textContent = details.origin;
-    $("approve-tx-from").innerHTML = approvalAddressHtml(
+    $("approve-tx-from").innerHTML = approvalAddressHtml(details.approvedFrom);
        details.approvedFrom,
        approvedTx.chainId,
    );
-    // Show token symbol next to contract address if known on the network the
+    // Show token symbol next to contract address if known
-    // transaction is for
+    const symbol = toAddr ? tokenLabel(toAddr) : null;
    const symbol = toAddr ? tokenLabel(toAddr, approvedTx.chainId) : null;
    if (toAddr) {
        let toHtml = "";
        if (symbol) {
            toHtml += `<div class="font-bold mb-1">${escapeHtml(symbol)}</div>`;
        }
-        toHtml += approvalAddressHtml(toAddr, approvedTx.chainId);
+        toHtml += approvalAddressHtml(toAddr);
        $("approve-tx-to").innerHTML = toHtml;
    } else {
        $("approve-tx-to").innerHTML = escapeHtml(CONTRACT_CREATION_TEXT);
    }
-    const ethValueFormatted = formatTxValue(ethValue);
+    const ethValueFormatted = formatTxValue(
-    // Priced from the exact value, not the four-decimal figure, at the price
+        formatEther(approvedTx.value || "0"),
-    // on the network the transaction is for, as the confirmation screen prices
+    );
-    // its amount, so the same value reads the same on both.
+    const ethPrice = getPrice("ETH");
-    const ethPrice = getPrice("ETH", approvedTx.chainId);
+    const ethUsd = ethPrice ? parseFloat(ethValueFormatted) * ethPrice : null;
    const ethUsd = ethPrice ? parseFloat(ethValue) * ethPrice : null;
    const usdStr = formatUsd(ethUsd);
    // In the native currency of the network the transaction is for, which the
    // Network line names, not the active network's: the active network can
@@ -400,12 +386,9 @@ function showTxApproval(details) {
            detailsHtml += `<div class="text-muted">${escapeHtml(d.label)}</div>`;
            if (d.address) {
                if (d.isToken) {
-                    detailsHtml += `<div class="font-bold">${escapeHtml(tokenLabel(d.address, approvedTx.chainId) || "Unknown token")}</div>`;
+                    detailsHtml += `<div class="font-bold">${escapeHtml(tokenLabel(d.address) || "Unknown token")}</div>`;
                }
-                detailsHtml += approvalAddressHtml(
+                detailsHtml += approvalAddressHtml(d.address);
                    d.address,
                    approvedTx.chainId,
                );
            } else {
                detailsHtml += `<div class="font-bold">${escapeHtml(d.value)}</div>`;
            }
@@ -2,13 +2,7 @@
 // Shows transaction details, warnings, errors. On Sign & Send,
 // reads inline password, decrypts secret, signs and broadcasts.
-const {
+const { parseEther, parseUnits, formatEther, Contract } = require("ethers");
    parseEther,
    parseUnits,
    formatEther,
    formatUnits,
    Contract,
 } = require("ethers");
 const {
    $,
    showError,
@@ -17,16 +11,15 @@ const {
    addressTitle,
    escapeHtml,
    displaySymbol,
    nativeCurrency,
    renderAddressHtml,
    blockieHtml,
    attachCopyHandlers,
    goBack,
    onViewLeave,
    formatFee,
    reviewedNetworkProvider,
 } = require("./helpers");
 const { state, currentNetwork } = require("../../shared/state");
 const { nativeCurrencyByChainId } = require("../../shared/networks");
 const { getSignerForAddress } = require("../../shared/wallet");
 const { walletDefect } = require("../../shared/walletDefects");
 const { decryptWithPassword } = require("../../shared/vault");
@@ -39,12 +32,11 @@ const {
 const { ERC20_ABI, isBurnAddress } = require("../../shared/constants");
 const {
    displayedDecimals,
    toDecimals,
    transferAmountUnits,
 } = require("../../shared/transferAmount");
 const { assertWithinCeilings } = require("../../shared/approvalVerify");
-// The amount, the balance line and the fee reserve go through it, as the
+// The balance lines, the fee reserve and the insufficient-balance messages go
-// approval screen's amounts do.
+// through it, as the approval screen's amounts do.
 const { truncateAmountNeverZero } = require("../../shared/amountDisplay");
 const {
    CODES,
@@ -68,13 +60,6 @@ let feeWei = null;
 // amount was derived from. Null for any other send, which ethers prices from
 // the node at signing time.
 let maxSendFees = null;
 // The From address's balances on the network this screen is drawn for, read
 // from that network's node by readBalances() each time the screen is shown,
 // so a screen the popup reopens onto states them as they are then, not as
 // Send knew them. Null until the read returns; then `eth` and `token` are
 // decimal strings, `token` null for an ETH send or a token whose scale is
 // unknown, and both null if the read failed.
 let balances = null;
 function restore() {
    const d = state.viewData;
@@ -83,11 +68,11 @@ function restore() {
    }
 }
-function confirmAddressHtml(address, ensName, title, chainId) {
+function confirmAddressHtml(address, ensName, title) {
    const blockie = blockieHtml(address);
    return (
        `<div class="mb-1">${blockie}</div>` +
-        renderAddressHtml(address, { title, ensName, chainId })
+        renderAddressHtml(address, { title, ensName })
    );
 }
@@ -98,96 +83,34 @@ function valueWithUsd(text, usdAmount) {
    return text;
 }
-// The amount as this screen and the wait, success and error screens show it,
+// The Amount line, with its USD value. A max ETH send's line is drawn again
-// written as the approval screen writes a site's amount: the amount being
+// once its amount is re-derived from the fee estimate.
 // signed, parsed at the scale it is encoded with and written back as plain
 // decimal text, then cut to four decimals with the nonzero floor. So `.5` and
 // `00.5` read `0.5000`, as `0.5` does, except for a token whose scale is
 // unknown, which cannot be sent: its amount is cut as typed, so `.5` reads
 // `.5000`. txInfo.amount, which is what gets signed, is left as it is.
 function shownAmount(txInfo) {
    let exact = txInfo.amount;
    try {
        if (txInfo.token === "ETH") {
            exact = formatEther(parseEther(txInfo.amount));
        } else {
            const decimals = displayedDecimals(txInfo.tokenDecimals);
            exact = formatUnits(parseUnits(txInfo.amount, decimals), decimals);
        }
    } catch {
        // A token whose scale is unknown, which is never signed, or an amount
        // the amount check refuses: cut as Send's amount field held it.
    }
    return truncateAmountNeverZero(exact);
 }
 // The Amount line, with its USD value, which is priced from the exact amount.
 // A max ETH send's line is drawn again once its amount is re-derived from the
 // fee estimate.
 function renderAmount(txInfo) {
    const isErc20 = txInfo.token !== "ETH";
-    const rawSymbol = isErc20
+    const rawSymbol = isErc20 ? txInfo.tokenSymbol || "?" : nativeCurrency();
-        ? txInfo.tokenSymbol || "?"
+    const price = isErc20 ? getPrice(rawSymbol) : getPrice("ETH");
        : nativeCurrencyByChainId(txInfo.chainId);
    const price = getPrice(isErc20 ? rawSymbol : "ETH", txInfo.chainId);
    const amountUsd = price ? parseFloat(txInfo.amount) * price : null;
    $("confirm-amount").textContent = valueWithUsd(
-        shownAmount(txInfo) + " " + displaySymbol(rawSymbol),
+        txInfo.amount + " " + displaySymbol(rawSymbol),
        amountUsd,
    );
 }
 // The balance line, with its USD value: "Loading..." until readBalances()
 // returns, then the balance it read.
 function renderBalance(txInfo) {
    const isErc20 = txInfo.token !== "ETH";
    const rawSymbol = isErc20
        ? txInfo.tokenSymbol || "?"
        : nativeCurrencyByChainId(txInfo.chainId);
    const symbol = displaySymbol(rawSymbol);
    if (balances === null) {
        $("confirm-balance").textContent = "Loading...";
        return;
    }
    // A null balance is one nobody established, for a token whose scale is
    // unknown or after a read that failed, and is stated as unknown, never as
    // zero (https://git.eeqj.de/sneak/AutistMask/issues/349).
    const bal = isErc20 ? balances.token : balances.eth;
    if (bal === null) {
        $("confirm-balance").textContent = "unknown (" + symbol + ")";
        return;
    }
    const price = getPrice(isErc20 ? rawSymbol : "ETH", txInfo.chainId);
    const balUsd = price ? parseFloat(bal) * price : null;
    $("confirm-balance").textContent = valueWithUsd(
        truncateAmountNeverZero(bal) + " " + symbol,
        balUsd,
    );
 }
 function show(txInfo) {
    pendingTx = txInfo;
    feeStatus = FEE_PENDING;
    feeWei = null;
    maxSendFees = null;
-    balances = null;
+    // The network this screen is drawn for, and the only one it sends on:
-    // The network this screen is drawn for, and the only one it sends on: the
+    // Settings can switch the active network while the screen is open. The
-    // one active when Send handed the transaction over. Drawn again from the
+    // wait, success and error screens label the amount by it too.
-    // saved transaction, as when the popup reopens onto this screen, it keeps
+    txInfo.chainId = currentNetwork().chainId;
    // that network, so Sign & Send refuses once Settings has switched to
    // another. Everything this screen shows is that network's: native
    // currency, USD values, explorer links, the balance, and the node and
    // explorer its checks ask. The wait, success and error screens label
    // amounts by it.
    if (!txInfo.chainId) txInfo.chainId = currentNetwork().chainId;
    const isErc20 = txInfo.token !== "ETH";
    // The raw symbol is the price-table key; the capped one is what the
    // screen says. Truncating before the lookup would silently drop the
    // price of any token whose symbol is long enough to be capped.
-    const rawSymbol = isErc20
+    const rawSymbol = isErc20 ? txInfo.tokenSymbol || "?" : nativeCurrency();
        ? txInfo.tokenSymbol || "?"
        : nativeCurrencyByChainId(txInfo.chainId);
    const symbol = displaySymbol(rawSymbol);
    // Transaction type
@@ -203,7 +126,7 @@ function show(txInfo) {
    if (isErc20) {
        $("confirm-token-contract").innerHTML = renderAddressHtml(
            txInfo.token,
-            { chainId: txInfo.chainId },
+            {},
        );
        tokenSection.classList.remove("hidden");
        attachCopyHandlers(tokenSection);
@@ -217,7 +140,6 @@ function show(txInfo) {
        txInfo.from,
        null,
        fromTitle,
        txInfo.chainId,
    );
    // To (with blockie)
@@ -226,12 +148,37 @@ function show(txInfo) {
        txInfo.to,
        txInfo.ensName,
        toTitle,
        txInfo.chainId,
    );
    $("confirm-to-ens").classList.add("hidden");
    renderAmount(txInfo);
-    renderBalance(txInfo);
+
    // Balance (with inline USD)
    const ethPrice = getPrice("ETH");
    const tokenPrice = getPrice(rawSymbol);
    if (isErc20) {
        // null is a balance whose scale nothing knows, not a balance of zero
        // (https://git.eeqj.de/sneak/AutistMask/issues/349). The send is
        // refused at encode time for the same missing scale; what this line
        // must not do is state a quantity nobody established.
        const bal = txInfo.tokenBalance;
        const balUsd =
            tokenPrice && bal != null ? parseFloat(bal) * tokenPrice : null;
        $("confirm-balance").textContent =
            bal == null
                ? "unknown (" + symbol + ")"
                : valueWithUsd(
                      truncateAmountNeverZero(bal) + " " + symbol,
                      balUsd,
                  );
    } else {
        const bal = txInfo.balance || "0";
        const balUsd = ethPrice ? parseFloat(bal) * ethPrice : null;
        $("confirm-balance").textContent = valueWithUsd(
            truncateAmountNeverZero(bal) + " " + symbol,
            balUsd,
        );
    }
    // Check for warnings (synchronous local checks)
    const localWarnings = getLocalWarnings(txInfo.to, {
@@ -265,9 +212,9 @@ function show(txInfo) {
    $("confirm-gas-error").classList.toggle("hidden", !isErc20);
    $("confirm-gas-error").textContent =
        "You do not have enough " +
-        nativeCurrencyByChainId(txInfo.chainId) +
+        nativeCurrency() +
        " to pay the network fee for this transfer. Please add " +
-        nativeCurrencyByChainId(txInfo.chainId) +
+        nativeCurrency() +
        " to this address and try again.";
    // Both shown later, by checkRecipientHistory(). The first sentence says
@@ -275,12 +222,12 @@ function show(txInfo) {
    $("confirm-recipient-warning").textContent =
        "WARNING: The recipient address has never sent a transaction and" +
        " holds no " +
-        nativeCurrencyByChainId(txInfo.chainId) +
+        nativeCurrency() +
        ". This may indicate a fresh or unused address. Double-check the" +
        " address before sending.";
    $("confirm-contract-warning").textContent =
        "WARNING: The recipient is a smart contract. Sending " +
-        nativeCurrencyByChainId(txInfo.chainId) +
+        nativeCurrency() +
        " or tokens directly to a contract may result in permanent loss of" +
        " funds.";
@@ -297,29 +244,11 @@ function show(txInfo) {
              " cannot be checked against your balance. Please go back and" +
              " try again.";
    // So does the message for an amount the balance does not cover. It is
    // set here, before the first paint, so the balance read returning only
    // makes it visible and moves nothing, which is why it quotes no balance.
    // Without the token's scale readBalances() reads no token balance.
    $("confirm-balance-error").textContent =
        isErc20 && toDecimals(txInfo.tokenDecimals) === null
            ? "This token's balance is unknown, because nothing this wallet" +
              " can consult reports how many decimal places it uses, so the" +
              " amount you are trying to send cannot be checked against it."
            : "Your " +
              symbol +
              " balance does not cover this amount. Please go back and send" +
              " a smaller amount.";
    renderValidation(txInfo);
-    // Reset password field and error, and any refusal of an earlier Sign &
+    // Reset password field and error
    // Send.
    $("confirm-tx-password").value = "";
    hideError("confirm-tx-password-error");
    setVisible("confirm-network-changed-error", false);
    setVisible("confirm-from-address-error", false);
    setVisible("confirm-fee-bound-error", false);
    // Gas estimate — show placeholder then fetch async
    $("confirm-fee").style.visibility = "visible";
@@ -340,78 +269,69 @@ function show(txInfo) {
        $("confirm-burn-warning").style.visibility = "visible";
    }
-    // The fee is estimated once the balances are read, because a max ETH
+    estimateGas(txInfo);
    // send's amount is the ETH balance minus the estimate's reserve.
    readBalances(txInfo).then(() => estimateGas(txInfo));
    checkRecipientHistory(txInfo);
 }
 // Read the From address's balances from the node of the network this
 // transaction was reviewed for: ETH, and for a token send the token, at the
 // scale the screen renders the amount with. A token whose scale is unknown has
 // no balance to read. Never rejects.
 async function readBalances(txInfo) {
    let read;
    try {
        const provider = reviewedNetworkProvider(txInfo);
        const decimals = toDecimals(txInfo.tokenDecimals);
        const readToken = txInfo.token !== "ETH" && decimals !== null;
        const [ethWei, tokenUnits] = await Promise.all([
            provider.getBalance(txInfo.from),
            readToken
                ? new Contract(txInfo.token, ERC20_ABI, provider).balanceOf(
                      txInfo.from,
                  )
                : null,
        ]);
        read = {
            eth: formatEther(ethWei),
            token: readToken ? formatUnits(tokenUnits, decimals) : null,
        };
    } catch (e) {
        log.errorf("balance read failed:", e.shortMessage || e.message);
        read = { eth: null, token: null };
    }
    // The user may have left this transaction while the read was in flight.
    if (pendingTx !== txInfo) return;
    balances = read;
    renderBalance(txInfo);
    renderValidation(txInfo);
 }
 // Render the balance check for the transaction on screen. Called once during
-// show(), again when the balances are read, and again when the fee estimate
+// show() and again when the fee estimate resolves or fails. Every element it
-// resolves or fails. Every element it touches already occupies its space, so
+// touches already occupies its space, so re-running it never moves anything.
 // re-running it never moves anything.
 function renderValidation(txInfo) {
    const isErc20 = txInfo.token !== "ETH";
-
+    const symbol = isErc20
-    // Null while the balances are being read and after a read that failed.
+        ? displaySymbol(txInfo.tokenSymbol || "?")
-    // validateTransfer() takes a missing balance as nothing to spend from, so
+        : nativeCurrency();
    // sending stays blocked either way, and the only message shown for it is
    // the one saying the read failed.
    const ethBalance = balances ? balances.eth : null;
    const tokenBalance = balances ? balances.token : null;
    const balanceRead = ethBalance !== null;
    const { canSend, codes } = validateTransfer({
        isErc20,
        amount: txInfo.amount,
        tokenDecimals: txInfo.tokenDecimals,
-        ethBalance,
+        ethBalance: txInfo.balance,
-        tokenBalance,
+        tokenBalance: txInfo.tokenBalance,
        feeStatus,
        feeWei,
    });
-    // An invalid amount is known before the first paint, so its message is
+    // Messages carrying the user's own numbers are built here; the fixed
-    // written here. Every message a later result brings has a reserved
+    // sentences live in the reserved elements in index.html, except the
-    // element, its sentence fixed in index.html or set by show(), and is only
+    // gas and fee-unknown ones, which show() sets.
    // made visible below, so nothing moves when the result arrives.
    const messages = [];
    if (codes.includes(CODES.AMOUNT_INVALID)) {
        messages.push("Please enter a valid amount to send.");
    }
    if (codes.includes(CODES.INSUFFICIENT_TOKEN)) {
        messages.push(
            txInfo.tokenBalance == null
                ? "This token's balance is unknown, because nothing this" +
                      " wallet can consult reports how many decimal places it" +
                      " uses, so the amount you are trying to send cannot be" +
                      " checked against it."
                : "Insufficient " +
                      symbol +
                      " balance. You have " +
                      truncateAmountNeverZero(txInfo.tokenBalance) +
                      " " +
                      symbol +
                      " but are trying to send " +
                      txInfo.amount +
                      " " +
                      symbol +
                      ".",
        );
    }
    if (codes.includes(CODES.INSUFFICIENT_ETH)) {
        messages.push(
            "Insufficient balance. You have " +
                truncateAmountNeverZero(txInfo.balance || "0") +
                " " +
                symbol +
                " but are trying to send " +
                txInfo.amount +
                " " +
                symbol +
                ".",
        );
    }
    const errorsEl = $("confirm-errors");
    if (messages.length > 0) {
@@ -424,20 +344,13 @@ function renderValidation(txInfo) {
        errorsEl.style.visibility = "hidden";
    }
    setVisible("confirm-balance-read-error", balances !== null && !balanceRead);
    setVisible(
        "confirm-balance-error",
        balanceRead &&
            (codes.includes(CODES.INSUFFICIENT_TOKEN) ||
                codes.includes(CODES.INSUFFICIENT_ETH)),
    );
    setVisible(
        "confirm-amount-fee-error",
-        balanceRead && codes.includes(CODES.INSUFFICIENT_ETH_WITH_FEE),
+        codes.includes(CODES.INSUFFICIENT_ETH_WITH_FEE),
    );
    setVisible(
        "confirm-gas-error",
-        balanceRead && codes.includes(CODES.INSUFFICIENT_ETH_FOR_FEE),
+        codes.includes(CODES.INSUFFICIENT_ETH_FOR_FEE),
    );
    setVisible(
        "confirm-fee-unknown-error",
@@ -458,7 +371,7 @@ function setVisible(id, visible) {
 async function estimateGas(txInfo) {
    try {
-        const provider = reviewedNetworkProvider(txInfo);
+        const provider = getProvider(state.rpcUrl, state.networkId);
        const feeData = await provider.getFeeData();
        let gasLimit;
@@ -506,17 +419,12 @@ async function estimateGas(txInfo) {
        // does, so the same fee reads the same on both.
        if (estimateWei !== null && estimateWei < gasCostWei) {
            $("confirm-fee-amount").textContent =
-                "~" +
+                "~" + formatFee(estimateWei, nativeCurrency());
                formatFee(
                    estimateWei,
                    nativeCurrencyByChainId(txInfo.chainId),
                    txInfo.chainId,
                );
            $("confirm-fee-reserve").textContent =
                "up to " +
                truncateAmountNeverZero(formatEther(gasCostWei)) +
                " " +
-                nativeCurrencyByChainId(txInfo.chainId) +
+                nativeCurrency() +
                " reserved";
            setVisible("confirm-fee-reserve", true);
        } else {
@@ -525,21 +433,20 @@ async function estimateGas(txInfo) {
            // cost is not below the reserve. Show the reserve alone.
            $("confirm-fee-amount").textContent = formatFee(
                gasCostWei,
-                nativeCurrencyByChainId(txInfo.chainId),
+                nativeCurrency(),
                txInfo.chainId,
            );
            setVisible("confirm-fee-reserve", false);
        }
        feeStatus = FEE_KNOWN;
        feeWei = gasCostWei;
-        // A max ETH send is the balance readBalances() read minus this
+        // A max ETH send is the balance minus this estimate's reserve, not the
-        // estimate's reserve, not the Send screen's, and is signed with this
+        // Send screen's, and is signed with this estimate's fee fields: fees
-        // estimate's fee fields: fees fetched again at signing could exceed
+        // fetched again at signing could exceed the reserve it leaves, and the
-        // the reserve it leaves, and the node would refuse it for want of
+        // node would refuse it for want of funds. Where the balance no longer
-        // funds. Where the balance is unknown or no longer covers the fee, the
+        // covers the fee, the amount is left as it is and the balance check
-        // amount is left as it is and the balance check below says so.
+        // below says so.
        if (txInfo.max && txInfo.token === "ETH") {
-            const amount = maxEthAmount(balances?.eth, gasCostWei);
+            const amount = maxEthAmount(txInfo.balance, gasCostWei);
            if (amount !== null) {
                txInfo.amount = amount;
                renderAmount(txInfo);
@@ -568,17 +475,16 @@ async function estimateGas(txInfo) {
    }
 }
-// Populate the transaction this send describes, enforce the bounds against the
+// Populate the transaction this send describes, enforce the fee bound against
-// gas limit and fees that were actually filled in, then sign and broadcast it.
+// the fees that were actually filled in, then sign and broadcast it. Apart
-// Apart from a max ETH send, which passes its estimate's fee fields as `fees`,
+// from a max ETH send, which passes its estimate's fee fields as `fees`, the
-// the send pins no fee fields, so ethers fills maxFeePerGas and the gas limit
+// send pins no fee fields, so ethers fills maxFeePerGas and the gas limit from
-// from what the configured RPC node answers, with nothing otherwise bounding
+// what the configured RPC node answers, with nothing otherwise bounding what a
-// what a hostile node can set — the dApp path's ceilings never reached this
+// hostile node can set — the dApp path's ceilings never reached this one.
-// one. Populating before the check is what makes assertWithinCeilings() see
+// Populating before the check is what makes assertWithinCeilings() see the
-// the same numbers that would be signed; it throws an ApprovalMismatchError
+// same numbers that would be signed; it throws an ApprovalMismatchError when
-// when the gas limit, a fee per gas, or the product gasLimit × maxFeePerGas is
+// the product gasLimit × maxFeePerGas is over the bound, which the caller
-// over its bound, and the caller then shows the one refusal reserved for all
+// shows in the reserved error area rather than sending.
 // three rather than sending.
 async function populateVerifyAndSend(connectedSigner, tx, fees = null) {
    let request;
    if (tx.token === "ETH") {
@@ -606,16 +512,21 @@ async function populateVerifyAndSend(connectedSigner, tx, fees = null) {
    return connectedSigner.sendTransaction(populated);
 }
 // Show a full-sentence send failure in the reserved errors box, the same
 // element and markup renderValidation() uses for messages carrying the user's
 // own numbers, so it never moves anything on the screen.
 function showSendError(message) {
    const el = $("confirm-errors");
    el.innerHTML = `<div class="text-xs">${escapeHtml(message)}</div>`;
    el.style.visibility = "visible";
 }
 async function checkRecipientHistory(txInfo) {
    try {
-        const provider = reviewedNetworkProvider(txInfo);
+        const provider = getProvider(state.rpcUrl, state.networkId);
        const asyncWarnings = await getFullWarnings(txInfo.to, provider, {
            fromAddress: txInfo.from,
            chainId: txInfo.chainId,
        });
        // The user may have left this transaction while the checks were in
        // flight; its warnings must not reach another recipient's screen.
        if (pendingTx !== txInfo) return;
        for (const w of asyncWarnings) {
            if (w.type === "contract") {
                $("confirm-contract-warning").style.visibility = "visible";
@@ -644,11 +555,6 @@ function init(_ctx) {
    onViewLeave("confirm-tx", clearPassword);
    $("btn-confirm-send").addEventListener("click", async () => {
        // A press shows only its own refusal, if any.
        setVisible("confirm-network-changed-error", false);
        setVisible("confirm-from-address-error", false);
        setVisible("confirm-fee-bound-error", false);
        const wallet = state.wallets[state.selectedWallet];
        // Every Send button refuses a defective wallet before this screen,
        // but the popup also reopens onto it from a saved view.
@@ -658,12 +564,14 @@ function init(_ctx) {
            return;
        }
-        // The screen describes the network the transaction was reviewed for,
+        // Back from Settings only unhides this screen, still drawn for the
-        // which Settings may have switched away from since: "Back" from
+        // network that was active when it was shown.
        // Settings after a switch draws this screen again from the saved
        // transaction, as a popup reopened onto it does.
        if (currentNetwork().chainId !== pendingTx.chainId) {
-            setVisible("confirm-network-changed-error", true);
+            showSendError(
                "The active network changed after this transaction was" +
                    " reviewed, so it was not sent. Please go back and review" +
                    " it again.",
            );
            return;
        }
@@ -672,7 +580,11 @@ function init(_ctx) {
        // address selected.
        const addr = wallet.addresses.find((a) => a.address === pendingTx.from);
        if (!addr) {
-            setVisible("confirm-from-address-error", true);
+            showError(
                "confirm-tx-password-error",
                "The selected wallet does not hold the From address above, " +
                    "so nothing was sent. Please go back and send again.",
            );
            return;
        }
@@ -704,10 +616,6 @@ function init(_ctx) {
        $("btn-confirm-send").disabled = true;
        $("btn-confirm-send").classList.add("text-muted");
        // The wait, success and error screens show the amount as this screen
        // does, so they are handed a copy carrying that text. pendingTx keeps
        // the exact amount, which is the one signed.
        const shownTx = { ...pendingTx, amount: shownAmount(pendingTx) };
        let tx;
        try {
            const signer = getSignerForAddress(wallet, addr, decryptedSecret);
@@ -724,23 +632,19 @@ function init(_ctx) {
            // Note: JS strings are immutable; this nulls the reference but
            // the original string may persist in memory until GC.
            decryptedSecret = null;
-            txStatus.showWait(shownTx, tx.hash);
+            txStatus.showWait(pendingTx, tx.hash);
        } catch (e) {
            decryptedSecret = null;
-            // A gas limit or fee over its bound is refused before anything is
+            // A fee over the bound is refused before anything is broadcast, so
-            // broadcast, so there is no transaction that may have reached the
+            // there is no transaction that may have reached the network to warn
-            // network to warn about: the refusal stays on the confirmation
+            // about: the message stays on the confirmation screen where the
-            // screen where the user can go back, rather than routing to the
+            // user can go back, rather than routing to the sent/failed screen.
            // sent/failed screen. Its sentence is fixed in index.html, so that
            // its box can hold its space from the first paint; the reason in
            // full, naming the bound, is logged.
            if (e && e.approvalMismatch) {
-                log.errorf("send refused:", e.message);
+                showSendError(e.message);
                setVisible("confirm-fee-bound-error", true);
                return;
            }
            const hash = tx ? tx.hash : null;
-            txStatus.showError(shownTx, hash, e.shortMessage || e.message);
+            txStatus.showError(pendingTx, hash, e.shortMessage || e.message);
        } finally {
            $("btn-confirm-send").disabled = false;
            $("btn-confirm-send").classList.remove("text-muted");
@@ -1,7 +1,4 @@
-// Helpers the views in this directory share: showing a view and going back,
+// Shared DOM helpers used by all views.
 // error and flash lines and the warning banners, formatting of amounts, fees,
 // balances, addresses and dates, the RPC and Blockscout URLs, node and tokens
 // of the network a chain id names, explorer links, and click-to-copy.
 //
 // Escaping rule for every view in this directory, since they all build
 // markup by concatenation: any VALUE interpolated into an innerHTML string
@@ -22,11 +19,9 @@ const {
    isBelowOneMillionth,
 } = require("../../shared/amountDisplay");
 const { resolveTokenSymbol } = require("../../shared/approvalAmount");
 const { getProvider } = require("../../shared/balances");
 const { DEBUG } = require("../../shared/constants");
 const { escapeHtml } = require("../../shared/html");
 const { isDebug } = require("../../shared/log");
 const { networkByChainId } = require("../../shared/networks");
 const { formatUsd, getPrice } = require("../../shared/prices");
 const { state, saveState, currentNetwork } = require("../../shared/state");
 const { displaySymbol } = require("../../shared/symbolDisplay");
@@ -132,8 +127,7 @@ function showView(name) {
 }
 // Create or update the debug/insecure warning banner.
-// Called on every view switch, after the settings debug toggle changes, and
+// Called on every view switch and after the settings debug toggle changes.
 // after a network switch in Settings.
 // The banner is shown when the compile-time DEBUG constant is true OR when
 // the user has enabled runtime debug mode via the settings easter egg, OR
 // when the active network is a testnet.
@@ -290,51 +284,34 @@ function unknownableAmount(balance) {
 // The active network's native token symbol, `ETH` on mainnet and `SepoliaETH`
 // on Sepolia, as src/shared/networks.js names it. The wallet's balances and
-// the Send screen, which sends on the active network, label a native amount
+// the Send and confirmation screens, which send on the active network, label a
-// with this; the confirmation screen, and a transaction already made or
+// native amount with this; a transaction already made or requested is labelled
-// requested, label it by the transaction's own chain id, through
+// by its own chain id, through nativeCurrencyByChainId() in networks.js. The
-// nativeCurrencyByChainId() in networks.js. The "ETH" that state.selectedToken
+// "ETH" that state.selectedToken and txInfo.token hold is the native token's
-// and txInfo.token hold is the native token's id, not its label, and stays
+// id, not its label, and stays "ETH" on every network.
 // "ETH" on every network.
 function nativeCurrency() {
    return currentNetwork().nativeCurrency;
 }
-// What the wallet knows of the tokens on the network with this chain id, or
+// The symbol shown for a token line, resolved from the bundled list, the
-// on the active network when no chain id is given, as the `sources` that
+// tokens the user tracks, and the explorer's report — the same chain the
-// resolveTokenSymbol() and resolveTokenDecimals() take. A contract address
+// amount line's scale comes from. Null when no source names one, so the token
-// names a token on one network only, and every token balance held is the
+// lines keep saying `Unknown token` for a token nothing knows.
-// active network's, so another network gets the tokens tracked on it
+function tokenLabel(address) {
-// (state.networkTrackedTokens, see applyChainSwitchFields()) and no balances.
+    return resolveTokenSymbol(address, {
-function tokenSourcesByChainId(chainId) {
+        trackedTokens: state.trackedTokens,
-    const net = chainId ? networkByChainId(chainId) : currentNetwork();
+        wallets: state.wallets,
-    if (net && net.id === state.networkId) {
+    });
        return { trackedTokens: state.trackedTokens, wallets: state.wallets };
    }
    return {
        trackedTokens: (net && state.networkTrackedTokens[net.id]) || [],
        wallets: [],
    };
 }
 // The symbol shown for a token line on the network with `chainId`, or on the
 // active network when none is given: from the bundled list, the tokens the
 // user tracks, and the explorer's report, the sources the amount line's scale
 // comes from. Null when no source names one, so the token lines keep saying
 // `Unknown token` for a token nothing knows.
 function tokenLabel(address, chainId) {
    return resolveTokenSymbol(address, tokenSourcesByChainId(chainId));
 }
 // A network fee in wei as the confirmation and approval screens both show it:
 // the ETH figure through truncateAmountNeverZero() and labelled `symbol`, the
 // native currency of the network the fee is paid on, then its USD value when
-// the ETH price is known on the network with `chainId`, or on the active
+// the ETH price is known. The USD value is of the exact fee, not of the
-// network when no chain id is given. The USD value is of the exact fee, not of
+// truncated figure.
-// the truncated figure.
+function formatFee(wei, symbol) {
 function formatFee(wei, symbol, chainId) {
    const eth = formatEther(wei);
-    const ethPrice = getPrice("ETH", chainId);
+    const ethPrice = getPrice("ETH");
    const usd = ethPrice ? formatUsd(parseFloat(eth) * ethPrice) : "";
    return (
        truncateAmountNeverZero(eth) +
@@ -626,44 +603,18 @@ const EXT_ICON =
    `<path d="M7 1.5h3.5V5M7 5.5L10.5 1.5"/>` +
    `</svg></span>`;
 // The RPC and Blockscout URLs Settings has for the network with this chain id,
 // which need not be the active one: ConfirmTx, WaitTx and TransactionDetail
 // use the network their transaction's chain id names, and the popup can reopen
 // onto them after Settings switched the network. The active network's are
 // state.rpcUrl and state.blockscoutUrl, any other's the ones remembered for it,
 // or its defaults (see applyChainSwitchFields()).
 function endpointsByChainId(chainId) {
    const net = networkByChainId(chainId);
    if (net.id === state.networkId) {
        return { rpcUrl: state.rpcUrl, blockscoutUrl: state.blockscoutUrl };
    }
    const remembered = state.networkEndpoints[net.id] || {};
    return {
        rpcUrl: remembered.rpcUrl || net.defaultRpcUrl,
        blockscoutUrl: remembered.blockscoutUrl || net.defaultBlockscoutUrl,
    };
 }
 // The node of the network a transaction was reviewed for.
 function reviewedNetworkProvider(txInfo) {
    const net = networkByChainId(txInfo.chainId);
    return getProvider(endpointsByChainId(txInfo.chainId).rpcUrl, net.id);
 }
 // Block-explorer URLs. The origin is a per-network constant from
-// src/shared/networks.js, the explorer of the network with `chainId`, or of
+// src/shared/networks.js; only the path segment is data, and it comes out
-// the active network when no chain id is given; only the path segment is
+// of explorer JSON (a transaction's from/to, a token's address_hash), which
-// data, and it comes out of explorer JSON (a transaction's from/to, a token's
+// nothing upstream validates as hex. percent-encoding it keeps a segment
-// address_hash), which nothing upstream validates as hex. percent-encoding it
+// that contains a slash, a query or a fragment from re-pointing the link
-// keeps a segment that contains a slash, a query or a fragment from
+// somewhere else in the explorer.
-// re-pointing the link somewhere else in the explorer.
+function explorerUrl(kind, value) {
-function explorerUrl(kind, value, chainId) {
+    return `${currentNetwork().explorerUrl}/${kind}/${encodeURIComponent(value)}`;
    const network = chainId ? networkByChainId(chainId) : currentNetwork();
    return `${network.explorerUrl}/${kind}/${encodeURIComponent(value)}`;
 }
-function etherscanAddressUrl(address, chainId) {
+function etherscanAddressUrl(address) {
-    return explorerUrl("address", address, chainId);
+    return explorerUrl("address", address);
 }
 // The URL still has to be escaped on the way into href="...": encoding
@@ -729,18 +680,16 @@ function attachCopyHandlers(container) {
 //              with them, and the "at least 32 characters" guarantee has
 //              to survive having no current callers to be a guarantee.
 //   noLink   — if true, omit etherscan link
 //   chainId  — the network whose explorer the link opens; the active
 //              network's when absent
 //
 // After inserting the returned HTML into the DOM, call
 // attachCopyHandlers() on the parent to wire up click-to-copy.
 function renderAddressHtml(address, opts) {
-    const { title, ensName, maxLen, noLink, chainId } = opts || {};
+    const { title, ensName, maxLen, noLink } = opts || {};
    const dot = addressDotHtml(address);
    const displayAddr = maxLen
        ? truncateMiddle(address, Math.max(ADDRESS_MIN_DISPLAY_LEN, maxLen))
        : address;
-    const link = etherscanAddressUrl(address, chainId);
+    const link = etherscanAddressUrl(address);
    const extLink = noLink ? "" : etherscanLinkHtml(link);
    let html = "";
@@ -790,7 +739,6 @@ module.exports = {
    keyMaterialName,
    unknownableAmount,
    nativeCurrency,
    tokenSourcesByChainId,
    tokenLabel,
    formatFee,
    addressDotHtml,
@@ -806,8 +754,6 @@ module.exports = {
    attachCopyHandlers,
    etherscanLinkHtml,
    explorerUrl,
    endpointsByChainId,
    reviewedNetworkProvider,
    EXT_ICON,
    truncateMiddle,
    isoDate,
@@ -164,9 +164,8 @@ function renderSendTokenSelect(addr) {
    }
 }
-// The token balance the Send screen states, and the scale it hands the
+// The token balance and scale the Send screen states and hands the
-// confirmation screen, which reads the balance itself from the network it is
+// confirmation screen, so the two screens describe the holding the same way.
 // drawn for.
 //
 // The scale is resolved the same way balances.js resolved the scale it
 // DISPLAYED this token's balance at: bundled list, then the user's tracked
@@ -189,11 +188,13 @@ function renderSendTokenSelect(addr) {
 //
 // The two resolutions can therefore differ, and where they do, the stored
 // `balance` is a quantity computed at a scale this screen has just declined to
-// stand behind, so it is withdrawn: unknown scale means unknown balance. It is
+// stand behind. Stating it would leave validateTransfer() checking the amount
-// null rather than "0": this screen states it as unknown, as the confirmation
+// against a number the wallet does not vouch for, so it is withdrawn: unknown
-// screen does, and Max fills nothing in for it. Only a stored quantity is
+// scale means unknown balance. It is null rather than "0": both screens state
-// withdrawn: the "0" for a token that has no row at all is an absence of
+// an unknown balance as unknown, and validateTransfer() treats it as no balance
-// holdings, which is true at every scale.
+// to spend from, which is the fail-closed side of an amount nobody can check.
 // Only a stored quantity is withdrawn: the "0" for a token that has no row at
 // all is an absence of holdings, which is true at every scale.
 function tokenBalanceAndDecimals(addr, token) {
    const tb = (addr.tokenBalances || []).find(
        (t) => t.address.toLowerCase() === token.toLowerCase(),
@@ -377,6 +378,7 @@ function init(_ctx) {
        const addr = currentAddress();
        let tokenSymbol = null;
        let tokenBalance = null;
        let tokenDecimals = null;
        if (token !== "ETH") {
            tokenSymbol = resolveSymbol(
@@ -384,7 +386,10 @@ function init(_ctx) {
                addr.tokenBalances,
                state.trackedTokens,
            );
-            ({ tokenDecimals } = tokenBalanceAndDecimals(addr, token));
+            ({ tokenBalance, tokenDecimals } = tokenBalanceAndDecimals(
                addr,
                token,
            ));
        }
        // The confirmation screen's own amount check, so it is never shown
@@ -419,7 +424,9 @@ function init(_ctx) {
            ensName: ensName,
            amount: amount,
            token: token,
            balance: addr.balance,
            tokenSymbol: tokenSymbol,
            tokenBalance: tokenBalance,
            tokenDecimals: tokenDecimals,
            max: amountIsMax,
        });
@@ -16,8 +16,6 @@ const {
 } = require("../dustThreshold");
 const { state, saveState, currentNetwork } = require("../../shared/state");
 const { onChainSwitch } = require("../../shared/chainSwitch");
 const { restorableStack } = require("../../shared/persistedState");
 const { resetRenderedViews, markViewRendered } = require("../viewRouter");
 const {
    log,
    debugFetch,
@@ -321,35 +319,12 @@ function init(ctx) {
    networkSelect.addEventListener("change", async () => {
        const newId = networkSelect.value;
        if (newId === state.networkId) return;
        // The screens beneath Settings show the previous network, so Back
        // finds them as it does in a reopened popup: each is rendered again
        // when Back lands on it, and the stack is cut at the first one that
        // cannot be rendered from saved state, such as Send or AddToken. It
        // is cut at AddressToken too, unless that shows the native token: any
        // other token there was picked on the previous network. Without a
        // wallet the stack starts at Welcome, which that cut would drop, and
        // Welcome shows nothing from a network. The cut comes before the
        // switch so that the switch's save keeps it for a popup closed
        // straight after.
        if (state.hasWallet) {
            const tokenView = state.viewStack.indexOf("address-token");
            if (tokenView !== -1 && state.selectedToken !== "ETH") {
                state.viewStack = state.viewStack.slice(0, tokenView);
            }
            state.viewStack = restorableStack(state.viewStack, "settings");
        }
        const net = await onChainSwitch(newId);
        // Open pages are told by the background, as after a site's approved
        // switch request.
        notify({ type: "AUTISTMASK_NETWORK_CHANGED", chainId: net.chainId });
        resetRenderedViews();
        // Settings itself, and the testnet banner above it, are brought up
        // to date for the new network here.
        markViewRendered("settings");
        $("settings-rpc").value = state.rpcUrl;
        $("settings-blockscout").value = state.blockscoutUrl;
        renderTrackedTokens();
        updateDebugBanner(state.currentView);
        showFlash("Switched to " + net.name + ".");
    });
@@ -1,6 +1,6 @@
 const { $, showView, showFlash, escapeHtml, goBack } = require("./helpers");
 const { getTopTokens } = require("../../shared/tokenList");
-const { state, saveState, currentNetwork } = require("../../shared/state");
+const { state, saveState } = require("../../shared/state");
 const { lookupTokenInfo } = require("../../shared/balances");
 const { isScamAddress } = require("../../shared/scamlist");
 const { log } = require("../../shared/log");
@@ -75,12 +75,6 @@ function show() {
    $("settings-addtoken-address").value = "";
    $("settings-addtoken-info").textContent = "";
    $("settings-addtoken-info").style.visibility = "hidden";
    // The bundled list holds Ethereum Mainnet contracts, which name no token
    // on any other network.
    $("settings-addtoken-common").classList.toggle(
        "hidden",
        state.networkId !== "mainnet",
    );
    renderTop10();
    renderDropdown();
    showView("settings-addtoken");
@@ -136,9 +130,6 @@ function init(_ctx) {
        infoEl.textContent = "Looking up token...";
        infoEl.style.visibility = "visible";
        log.debugf("Looking up token contract", addr);
        // The network the lookup asks, which Settings may switch away from
        // before it answers, as for a transaction in confirmTx.js.
        const chainId = currentNetwork().chainId;
        try {
            const info = await lookupTokenInfo(
                addr,
@@ -146,15 +137,6 @@ function init(_ctx) {
                state.networkId,
                ctx.pageClosed,
            );
            // A contract address names a token on one network only, so an
            // answer after a switch is not added to the new network's list.
            if (currentNetwork().chainId !== chainId) {
                showFlash(
                    "The active network changed before the lookup finished," +
                        " so the token was not added.",
                );
                return;
            }
            log.infof("Adding token", info.symbol, addr);
            state.trackedTokens.push({
                address: addr,
@@ -24,11 +24,7 @@
 // than written again locally so that tests/popupElementIds.test.js sees these
 // lookups and holds every id below against the markup.
 const { $, VIEWS } = require("./helpers");
-const {
+const { storageGet, storageRemove } = require("../../shared/browserApi");
    storageGet,
    storageRemove,
    withLock,
 } = require("../../shared/browserApi");
 const { log } = require("../../shared/log");
 // Typed in full before anything is erased, in the same spirit as the wallet
@@ -141,11 +137,7 @@ async function resetProfile() {
        return;
    }
    try {
-        // Under the lock every write of the stored record takes, so the erase
+        await storageRemove("autistmask");
        // cannot land between another write's read and its write and be undone.
        // A page in a Firefox private window is the exception: Firefox gives
        // it locks of its own (README, "Stored state and its version").
        await withLock("autistmask", () => storageRemove("autistmask"));
    } catch (e) {
        log.errorf("state recovery: reset failed:", e);
        setFlash("The saved data could not be erased. Nothing was changed.");
@@ -18,11 +18,10 @@ const {
    copyableHtml,
    etherscanLinkHtml,
    explorerUrl,
    endpointsByChainId,
    displaySymbol,
    goBack,
 } = require("./helpers");
-const { state } = require("../../shared/state");
+const { state, currentNetwork } = require("../../shared/state");
 const { nativeCurrencyByChainId } = require("../../shared/networks");
 const { formatEther, formatUnits } = require("ethers");
 const { log, debugFetch } = require("../../shared/log");
@@ -49,16 +48,16 @@ function getTransactionType(tx) {
    return "Native " + nativeCurrencyByChainId(tx.chainId) + " Transfer";
 }
-function txAddressHtml(address, ensName, title, chainId) {
+function txAddressHtml(address, ensName, title) {
    const blockie = blockieHtml(address);
    return (
        `<div class="mb-1">${blockie}</div>` +
-        renderAddressHtml(address, { title, ensName, chainId })
+        renderAddressHtml(address, { title, ensName })
    );
 }
-function txHashHtml(hash, chainId) {
+function txHashHtml(hash) {
-    const link = explorerUrl("tx", hash, chainId);
+    const link = explorerUrl("tx", hash);
    const extLink = etherscanLinkHtml(link);
    return copyableHtml(hash, "break-all") + extLink;
 }
@@ -84,11 +83,10 @@ function show(tx) {
            method: tx.method || null,
            contractAddress: tx.contractAddress || null,
            // The network the history entry was read from. The type line and
-            // the fee are in its native currency, not the active network's,
+            // the fee are in its native currency, not the active network's:
-            // the links open its explorer, and the block, network details and
+            // the active network can change, in Settings or when the user
-            // calldata are read from its Blockscout: the active network can
+            // approves a site's request, before a later popup shows this
-            // change, in Settings or when the user approves a site's request,
+            // screen again.
            // before a later popup shows this screen again.
            chainId: tx.chainId,
        },
    };
@@ -98,24 +96,18 @@ function show(tx) {
 function render() {
    const tx = state.viewData.tx;
    if (!tx) return;
-    $("tx-detail-hash").innerHTML = txHashHtml(tx.hash, tx.chainId);
+    $("tx-detail-hash").innerHTML = txHashHtml(tx.hash);
    const fromTitle = addressTitle(tx.from, state.wallets);
    $("tx-detail-from").innerHTML = txAddressHtml(
        tx.from,
        tx.fromEns,
        fromTitle,
        tx.chainId,
    );
    // A contract creation has no recipient: transactions.js gives it `to: ""`.
    if (tx.to) {
        const toTitle = addressTitle(tx.to, state.wallets);
-        $("tx-detail-to").innerHTML = txAddressHtml(
+        $("tx-detail-to").innerHTML = txAddressHtml(tx.to, tx.toEns, toTitle);
            tx.to,
            tx.toEns,
            toTitle,
            tx.chainId,
        );
    } else {
        $("tx-detail-to").innerHTML = escapeHtml(CONTRACT_CREATION_TEXT);
    }
@@ -154,7 +146,7 @@ function render() {
    if (tokenContractSection && tokenContractEl) {
        if (tx.contractAddress) {
            const dot = addressDotHtml(tx.contractAddress);
-            const link = explorerUrl("token", tx.contractAddress, tx.chainId);
+            const link = explorerUrl("token", tx.contractAddress);
            // Hand-rolled rather than renderAddressHtml() because the
            // link goes to the explorer's /token/ page, not /address/.
            // Same two-row shape though: dot and link on the strip, the
@@ -212,11 +204,7 @@ function showDetailField(sectionId, contentId, value) {
 function populateOnChainDetails(txData, chainId) {
    // Block number
    if (txData.block_number != null) {
-        const blockLink = explorerUrl(
+        const blockLink = explorerUrl("block", String(txData.block_number));
            "block",
            String(txData.block_number),
            chainId,
        );
        const blockSection = $("tx-detail-block-section");
        const blockEl = $("tx-detail-block");
        if (blockSection && blockEl) {
@@ -313,9 +301,8 @@ async function loadFullTxDetails(txHash, chainId) {
    if (!section || !actionEl || !detailsEl) return;
    try {
        const { blockscoutUrl } = endpointsByChainId(chainId);
        const resp = await debugFetch(
-            blockscoutUrl + "/transactions/" + txHash,
+            state.blockscoutUrl + "/transactions/" + txHash,
        );
        if (!resp.ok) return;
        const txData = await resp.json();
@@ -329,13 +316,11 @@ async function loadFullTxDetails(txHash, chainId) {
        // Decoded against the address the transaction was sent to, as the
        // explorer reports it, not the history entry's `to`: for a token
        // transfer that is the transfer's recipient, not the token contract.
-        // On the network the transaction was sent on, whose Blockscout was
+        // On the active network, the one whose explorer was just asked.
        // just asked, and from the sender it reports.
        const decoded = decodeCalldata(
            inputData,
            txData.to?.hash || "",
-            chainId,
+            currentNetwork().chainId,
            txData.from?.hash || "",
        );
        if (decoded) {
            // Render decoded calldata matching approval view style
@@ -353,9 +338,9 @@ async function loadFullTxDetails(txHash, chainId) {
                    if (tokenSymbol) {
                        detailsHtml += `<div class="font-bold">${escapeHtml(displaySymbol(tokenSymbol))}</div>`;
                    }
-                    detailsHtml += renderAddressHtml(d.address, { chainId });
+                    detailsHtml += renderAddressHtml(d.address);
                } else if (d.address) {
-                    detailsHtml += renderAddressHtml(d.address, { chainId });
+                    detailsHtml += renderAddressHtml(d.address);
                } else {
                    detailsHtml += `<div class="font-bold">${escapeHtml(d.value)}</div>`;
                }
@@ -14,13 +14,10 @@ const {
    displaySymbol,
    clearViewStack,
    tokenLabel,
    reviewedNetworkProvider,
 } = require("./helpers");
 const { state } = require("../../shared/state");
-const {
+const { nativeCurrencyByChainId } = require("../../shared/networks");
-    SUPPORTED_CHAIN_IDS,
+const { getProvider } = require("../../shared/balances");
    nativeCurrencyByChainId,
 } = require("../../shared/networks");
 const { log } = require("../../shared/log");
 // Receipt poll cadence and the deadline after which the wait is reported as
@@ -64,22 +61,21 @@ function endWait() {
 }
 // A contract creation reaches these screens with `to` as "" (approval.js
-// writes `to: toAddr || ""`). The links below open the explorer of the network
+// writes `to: toAddr || ""`).
-// with `chainId`, or of the active network when none is given.
+function toAddressHtml(address) {
 function toAddressHtml(address, chainId) {
    if (!address) return escapeHtml(CONTRACT_CREATION_TEXT);
    const title = addressTitle(address, state.wallets);
-    return renderAddressHtml(address, { title, chainId });
+    return renderAddressHtml(address, { title });
 }
-function txHashHtml(hash, chainId) {
+function txHashHtml(hash) {
-    const link = explorerUrl("tx", hash, chainId);
+    const link = explorerUrl("tx", hash);
    return copyableHtml(hash, "break-all") + etherscanLinkHtml(link);
 }
-function blockNumberHtml(blockNumber, chainId) {
+function blockNumberHtml(blockNumber) {
    const num = String(blockNumber);
-    const link = explorerUrl("block", num, chainId);
+    const link = explorerUrl("block", num);
    return copyableHtml(num) + etherscanLinkHtml(link);
 }
@@ -95,11 +91,9 @@ function startWait(txInfo, txHash, broadcastTime, pollNow) {
    // native currency of txInfo.chainId, the network the transaction was sent
    // on, not the active network's: the active network can change, in
    // Settings or when the user approves a site's request, while this screen
-    // is open or before a later popup resumes it. The links on all three
+    // is open or before a later popup resumes it. A null token is a swap whose
-    // screens open that network's explorer, and this screen's receipt is
+    // amount was not decoded (see showTxApproval() in approval.js): the amount
-    // asked of that network's node, for the same reason. A null token is a
+    // says so, and no symbol follows it.
    // swap whose amount was not decoded (see showTxApproval() in
    // approval.js): the amount says so, and no symbol follows it.
    let symbol = "";
    if (txInfo.token === "ETH") {
        symbol = nativeCurrencyByChainId(txInfo.chainId);
@@ -108,8 +102,8 @@ function startWait(txInfo, txHash, broadcastTime, pollNow) {
    }
    $("wait-tx-summary").textContent =
        txInfo.amount + (symbol ? " " + symbol : "");
-    $("wait-tx-to").innerHTML = toAddressHtml(txInfo.to, txInfo.chainId);
+    $("wait-tx-to").innerHTML = toAddressHtml(txInfo.to);
-    $("wait-tx-hash").innerHTML = txHashHtml(txHash, txInfo.chainId);
+    $("wait-tx-hash").innerHTML = txHashHtml(txHash);
    attachCopyHandlers("view-wait-tx");
    // Persisted so closing and reopening the popup resumes this wait
@@ -134,7 +128,7 @@ function startWait(txInfo, txHash, broadcastTime, pollNow) {
        renderElapsed();
    }, 1000);
-    const provider = reviewedNetworkProvider(txInfo);
+    const provider = getProvider(state.rpcUrl, state.networkId);
    let consecutiveFailures = 0;
    async function poll() {
@@ -213,11 +207,10 @@ function showWait(txInfo, txHash) {
 // an object merely missing one of them throws a TypeError out of
 // restoreView() — which init() does not guard, skipping the rest of popup
 // init and leaving wait-tx on screen with no back control. A non-numeric
-// broadcastTime leaves an unexitable wait counting "NaNs". txInfo.chainId picks
+// broadcastTime leaves an unexitable wait counting "NaNs". txInfo.token,
-// the node the receipt is asked of and the explorer the links open, so it has
+// txInfo.tokenSymbol and txInfo.chainId are deliberately unchecked: they are
-// to name a network. txInfo.token and txInfo.tokenSymbol are deliberately
+// compared and coalesced rather than dereferenced, and tokenSymbol is null for
-// unchecked: they are compared and coalesced rather than dereferenced, and
+// ETH.
 // tokenSymbol is null for ETH.
 function restoreWait() {
    const d = state.viewData;
    if (!d || !d.pendingWait) return false;
@@ -233,7 +226,6 @@ function restoreWait() {
    // path itself created.
    if (typeof info.to !== "string") return false;
    if (typeof info.amount !== "string") return false;
    if (!SUPPORTED_CHAIN_IDS.has(info.chainId)) return false;
    if (typeof w.broadcastTime !== "number" || !isFinite(w.broadcastTime)) {
        return false;
    }
@@ -258,13 +250,12 @@ function showSuccess(txInfo, txHash, blockNumber) {
        hash: txHash,
        blockNumber: blockNumber,
        decoded: txInfo.decoded || null,
        chainId: txInfo.chainId,
    };
    renderSuccess();
    ctx.doRefreshAndRender();
 }
-function decodedDetailsHtml(decoded, chainId) {
+function decodedDetailsHtml(decoded) {
    if (!decoded || !decoded.details) return "";
    let html = `<div class="border border-border border-dashed p-2 mb-3">`;
    if (decoded.name) {
@@ -280,11 +271,11 @@ function decodedDetailsHtml(decoded, chainId) {
        html += `<div class="text-xs text-muted mb-1">${escapeHtml(d.label)}</div>`;
        if (d.address) {
            if (d.isToken) {
-                const sym = tokenLabel(d.address, chainId) || "Unknown token";
+                const sym = tokenLabel(d.address) || "Unknown token";
                html += `<div class="font-bold">${escapeHtml(sym)}</div>`;
-                html += toAddressHtml(d.address, chainId);
+                html += toAddressHtml(d.address);
            } else {
-                html += toAddressHtml(d.address, chainId);
+                html += toAddressHtml(d.address);
            }
        } else {
            html += `<div class="font-bold">${escapeHtml(d.value)}</div>`;
@@ -313,16 +304,16 @@ function renderSuccess() {
        toSection.classList.remove("hidden");
        $("success-tx-summary").textContent =
            d.amount + (d.symbol ? " " + d.symbol : "");
-        $("success-tx-to").innerHTML = toAddressHtml(d.to, d.chainId);
+        $("success-tx-to").innerHTML = toAddressHtml(d.to);
    }
-    $("success-tx-block").innerHTML = blockNumberHtml(d.blockNumber, d.chainId);
+    $("success-tx-block").innerHTML = blockNumberHtml(d.blockNumber);
-    $("success-tx-hash").innerHTML = txHashHtml(d.hash, d.chainId);
+    $("success-tx-hash").innerHTML = txHashHtml(d.hash);
    // Show decoded calldata details if present
    const decodedEl = $("success-tx-decoded");
    if (decodedEl && hasDecoded) {
-        decodedEl.innerHTML = decodedDetailsHtml(d.decoded, d.chainId);
+        decodedEl.innerHTML = decodedDetailsHtml(d.decoded);
        decodedEl.classList.remove("hidden");
    } else if (decodedEl) {
        decodedEl.classList.add("hidden");
@@ -348,7 +339,6 @@ function showError(txInfo, txHash, message) {
        to: txInfo.to,
        hash: txHash || null,
        message: message,
        chainId: txInfo.chainId,
    };
    renderError();
 }
@@ -358,11 +348,11 @@ function renderError() {
    if (!d || !d.message) return;
    $("error-tx-summary").textContent =
        d.amount + (d.symbol ? " " + d.symbol : "");
-    $("error-tx-to").innerHTML = toAddressHtml(d.to, d.chainId);
+    $("error-tx-to").innerHTML = toAddressHtml(d.to);
    $("error-tx-message").textContent = d.message;
    if (d.hash) {
-        $("error-tx-hash").innerHTML = txHashHtml(d.hash, d.chainId);
+        $("error-tx-hash").innerHTML = txHashHtml(d.hash);
        $("error-tx-hash-section").classList.remove("hidden");
        attachCopyHandlers("view-error-tx");
    } else {
@@ -58,8 +58,6 @@ function getLocalWarnings(address, options = {}) {
 * @param {object} provider - An ethers.js provider instance.
 * @param {object} [options] - Optional context.
 * @param {string} [options.fromAddress] - Sender address (for self-send check).
 * @param {string} [options.chainId] - Chain id of the network whose explorer
 *   the Etherscan label check asks; the active network's when omitted.
 * @returns {Promise<Array<{type: string, message: string, severity: string}>>}
 */
 async function getFullWarnings(address, provider, options = {}) {
@@ -112,10 +110,7 @@ async function getFullWarnings(address, provider, options = {}) {
    // Runs for ALL addresses including contracts, since many dangerous
    // flagged addresses on Etherscan (drainers, phishing contracts) are contracts.
    try {
-        const etherscanWarning = await checkEtherscanLabel(
+        const etherscanWarning = await checkEtherscanLabel(address);
            address,
            options.chainId,
        );
        if (etherscanWarning) {
            warnings.push(etherscanWarning);
        }
@@ -31,11 +31,6 @@
 // Everything is resolved on use rather than captured at module load. The MV3
 // service worker is torn down and re-evaluated repeatedly, and the unit
 // suite installs its stubs on `global.chrome` around a require().
 //
 // The module also holds withLock(), a wrapper around the browser's
 // `navigator.locks`, which is in neither namespace. It sits beside
 // storageGet() and storageSet() because every write of the stored record
 // takes it.
 // The extension API namespace, preferring `browser.*` where it exists.
 //
@@ -224,33 +219,6 @@ function storageRemove(keys) {
    return Promise.resolve(storage.remove(keys));
 }
 /**
 * Run `fn` while holding the browser's lock called `name`
 * (`navigator.locks`), and settle as `fn` settles. Every page of the extension
 * and its background share these locks, except a page in a Firefox private
 * window (README, "Stored state and its version"), so while one of them holds
 * `name` another asking for it waits, in the order they asked. The lock is let
 * go when `fn` settles, whether it resolved or rejected.
 *
 * Every write of the stored record holds the lock named after its key,
 * "autistmask", from its read to its write: saveState() in
 * src/shared/state.js, updateState() in src/background/state.js, and the
 * reset in src/popup/views/stateRecovery.js.
 *
 * @param {string} name
 * @param {function(): Promise<*>} fn
 * @returns {Promise<*>} what `fn` resolved with.
 * @throws rejects, without running `fn`, where `navigator.locks` is absent.
 */
 function withLock(name, fn) {
    if (typeof navigator === "undefined" || !navigator.locks) {
        return Promise.reject(
            new Error("navigator.locks is not available in this context"),
        );
    }
    return navigator.locks.request(name, () => fn());
 }
 // `storage.session`, the browser's session storage: what is kept there lasts
 // until the browser closes. It survives the background worker being stopped
 // and started again, which module-level variables do not (README, Background
@@ -405,5 +373,4 @@ module.exports = {
    windowsGetLastFocused,
    windowsRemove,
    windowsUpdate,
    withLock,
 };
@@ -38,16 +38,6 @@ function applyChainSwitchFields(s, newNetworkId) {
        blockscoutUrl: s.blockscoutUrl,
    };
    const remembered = s.networkEndpoints[net.id] || {};
    // Tracked tokens are kept per network the same way, because a contract
    // address names a token on one network only. s.trackedTokens stays the
    // active network's list, so nothing that reads it changes: the outgoing
    // list is put away under its network, and the incoming network's list, or
    // an empty one, takes its place.
    if (!s.networkTrackedTokens) s.networkTrackedTokens = {};
    s.networkTrackedTokens[s.networkId] = s.trackedTokens;
    s.trackedTokens = s.networkTrackedTokens[net.id] || [];
    s.networkId = net.id;
    s.rpcUrl = remembered.rpcUrl || net.defaultRpcUrl;
    s.blockscoutUrl = remembered.blockscoutUrl || net.defaultBlockscoutUrl;
@@ -2,8 +2,6 @@
 // Extension users make the requests directly to Etherscan — no proxy needed.
 // This is a best-effort enrichment: network failures return null silently.
 const { networkByChainId } = require("./networks");
 // Patterns in the page title that indicate a flagged address.
 // Title format: "Fake_Phishing184810 | Address: 0x... | Etherscan"
 const PHISHING_LABEL_PATTERNS = [/^Fake_Phishing/i, /^Phish:/i, /^Exploiter/i];
@@ -74,21 +72,18 @@ function parseEtherscanPage(html) {
 * Returns a warning object if the address is flagged, or null.
 * Network failures return null silently (best-effort check).
 *
- * Uses the explorer of the network with `chainId`, or of the active network
+ * Uses the current network's explorer URL so the lookup works on both
- * when it is omitted: etherscan.io on mainnet, sepolia.etherscan.io on
+ * mainnet (etherscan.io) and Sepolia (sepolia.etherscan.io).
 * Sepolia.
 *
 * @param {string} address - Ethereum address to check.
 * @param {string} [chainId] - Chain id of the network to look it up on.
 * @returns {Promise<{type: string, message: string, severity: string}|null>}
 */
-async function checkEtherscanLabel(address, chainId) {
+async function checkEtherscanLabel(address) {
    try {
        // Lazy require to avoid pulling in chrome.storage at module scope
        // (which breaks unit tests that only exercise parseEtherscanPage).
        const { currentNetwork } = require("./state");
-        const network = chainId ? networkByChainId(chainId) : currentNetwork();
+        const etherscanBase = currentNetwork().explorerUrl + "/address/";
        const etherscanBase = network.explorerUrl + "/address/";
        const resp = await fetch(etherscanBase + address, {
            headers: { Accept: "text/html" },
        });
@@ -23,11 +23,6 @@ const DEFAULT_STATE = {
    hasWallet: false,
    wallets: [],
    trackedTokens: [],
    // Tracked tokens remembered per network: { [networkId]: [token, ...] }.
    // trackedTokens above is the active network's list; this is what the
    // others are restored from when the active network changes. See
    // applyChainSwitchFields().
    networkTrackedTokens: {},
    networkId: "mainnet",
    rpcUrl: DEFAULT_RPC_URL,
    blockscoutUrl: DEFAULT_BLOCKSCOUT_URL,
@@ -294,20 +289,6 @@ function normalizePersisted(saved) {
    // profile whose wallets are perfectly fine. An empty list is a legitimate
    // value and survives.
    out.trackedTokens = structuredClone(tokenRefs(saved.trackedTokens));
    // Each remembered list is floored like trackedTokens, because
    // applyChainSwitchFields() puts it straight back onto trackedTokens when
    // its network becomes the active one. A key that is not a network in
    // networks.js is dropped, which also keeps an own "__proto__" key from
    // reaching the plain assignment below.
    out.networkTrackedTokens = {};
    if (isRecord(saved.networkTrackedTokens)) {
        for (const netId of Object.keys(saved.networkTrackedTokens)) {
            if (!isKnownNetworkId(netId)) continue;
            out.networkTrackedTokens[netId] = structuredClone(
                tokenRefs(saved.networkTrackedTokens[netId]),
            );
        }
    }
    // The loud refusal for an unknown id is assertStateUsable(); this is the
    // floor under it. networkId is an object KEY into networkEndpoints below,
    // so a value that is not a network in networks.js must never get that far
@@ -2,7 +2,6 @@
 const { getTopTokenPrices } = require("./tokenList");
 const { isBelowOneMillionth } = require("./amountDisplay");
 const { networkByChainId } = require("./networks");
 const PRICE_CACHE_TTL = 300000; // 5 minutes
@@ -37,13 +36,10 @@ function clearPrices() {
    lastFetchedAt = 0;
 }
-// Return the USD price for a symbol on the network with `chainId`, or on the
+// Return the USD price for a symbol, or null on testnet / unknown.
-// active network when no chain id is given; null on testnet, on a chain id
+function getPrice(symbol) {
 // that names no network, or for a symbol with no price.
 function getPrice(symbol, chainId) {
    const { currentNetwork } = require("./state");
-    const network = chainId ? networkByChainId(chainId) : currentNetwork();
+    if (currentNetwork().isTestnet) return null;
    if (!network || network.isTestnet) return null;
    return prices[symbol] || null;
 }
@@ -35,18 +35,16 @@ const {
    migrationNeeded,
 } = require("./stateSchema");
-const { storageGet, storageSet, withLock } = require("./browserApi");
+const { storageGet, storageSet } = require("./browserApi");
 const { log } = require("./log");
 // The live record the proxy below guards. Everything inside this module reads
 // and writes THIS object, never the proxy: the guard is for callers.
 const rawState = {
    ...DEFAULT_STATE,
-    // Their own objects, not the ones DEFAULT_STATE holds:
+    // Its own object, not the one DEFAULT_STATE holds: applyChainSwitchFields()
-    // applyChainSwitchFields() mutates these maps in place, and a spread copies
+    // mutates this map in place, and a spread copies the reference.
    // the reference.
    networkEndpoints: {},
    networkTrackedTokens: {},
    currentView: null,
    selectedWallet: null,
    selectedAddress: null,
@@ -440,14 +438,12 @@ function mergeNetworkEndpoints(base, ours, theirs) {
 //
 // Every other persisted field stays a whole-field diff:
 // `trackedTokens`/`fraudContracts`/`viewStack` are arrays of scalars with no
-// per-element identity to merge by; `networkTrackedTokens` is diffed whole like
+// per-element identity to merge by; `tokenHolderCache` is a map shaped like
-// `trackedTokens` and `networkId`, the two fields a network switch moves
+// the ones above, but nothing in src/ ever writes an entry into it — it is
-// together with it; `tokenHolderCache` is a map shaped like the ones above,
+// only ever reset wholesale to `{}` (applyChainSwitchFields()) — so there is
-// but nothing in src/ ever writes an entry into it — it is only ever reset
+// no in-place mutation for a whole-field diff to collide with; `viewData` is
-// wholesale to `{}` (applyChainSwitchFields()) — so there is no in-place
+// this page's own UI scratch space, not data another page has any reason to
-// mutation for a whole-field diff to collide with; `viewData` is this page's
+// share membership of.
 // own UI scratch space, not data another page has any reason to share
 // membership of.
 //
 // This does not make two pages that both change the SAME leaf concurrently
 // safe: last write wins on that one leaf, same as before. What it removes
@@ -458,8 +454,8 @@ function mergeNetworkEndpoints(base, ours, theirs) {
 // This page's own live `state` is deliberately NOT rehydrated from a field
 // another page changed — only the record written to storage is merged.
 // showView() fires saveState() on every navigation without awaiting it,
-// which is why saves from one page wait for each other (see saveState()), and
+// which is what makes the queue above necessary in the first place, and a
-// a save that is slow to come back has no way to tell whether the field it
+// save that is slow to come back has no way to tell whether the field it
 // is about to hand back is still the current answer or has since been
 // overtaken by something this very page did in the meantime; writing it
 // into `state` regardless reintroduced exactly the clobber this function
@@ -529,21 +525,35 @@ async function saveStateOnce() {
    rawState.hasWallet = rawState.wallets.length > 0;
    // What this save compared and wrote, not the page's state now: a change
-    // made during the save must still differ from the baseline, or the next
+    // made during the save must still differ from the baseline, or the save
-    // save finds nothing to store
+    // queued after it finds nothing to store
    // (https://git.eeqj.de/sneak/AutistMask/issues/448).
    baseline = current;
 }
 // showView() calls saveState() on every navigation without awaiting it, so
 // two saves from the SAME page can be in flight at once — e.g. a screen
 // shown, then immediately replaced before the first save's storageGet()
 // round trip has come back. Left concurrent, the first save's turn would
 // finish after the second's live-state mutation and then re-hydrate `state`
 // from what IT read, stomping the second, later change back to a stale
 // value — the same clobber this function exists to prevent, just between
 // two saves on one page instead of two pages. Queuing makes every save's
 // snapshot-diff-write-rehydrate run start to finish before the next one
 // begins, so each one only ever sees the true live state at its turn.
 let saveQueue = Promise.resolve();
 // Where a failed save is REPORTED, set once by the context that has a screen
 // to say it on (src/popup/index.js).
 //
 // A save that fails must not fail silently. showView() fires saveState() on
-// every navigation without awaiting it, and `await saveState()` inside an
+// every navigation without awaiting it, and the queue below has to attach a
-// unguarded event handler is no better: either way, without this, a failure
+// rejection handler to keep advancing — so a failing save was swallowed
-// would reach only the console, where the user never looks, and the wallet
+// entirely: no throw, no message, nothing on screen. The wallet kept running
-// would keep running against storage that rejects every write. That is the
+// against storage that was rejecting every write, which is the data-loss half
-// data-loss half of https://git.eeqj.de/sneak/AutistMask/issues/362.
+// of https://git.eeqj.de/sneak/AutistMask/issues/362. The awaited callers were
 // no better off: `await saveState()` inside an unguarded event handler surfaces
 // in the console and nowhere the user looks.
 //
 // This is the "tell the user" half; the other half is the floor in
 // normalizePersisted(), which stops the malformed-record cause from arising in
@@ -569,20 +579,11 @@ function reportSaveFailure(err) {
    }
 }
 // Each save runs start to finish holding the lock every write of the stored
 // record takes (withLock() in src/shared/browserApi.js), so no write by
 // another page or the background lands between its read and its write and is
 // lost (https://git.eeqj.de/sneak/AutistMask/issues/641). A page in a Firefox
 // private window is the exception: Firefox gives it locks of its own (README,
 // "Stored state and its version").
 //
 // The same lock orders this page's own saves. showView() calls saveState() on
 // every navigation without awaiting it, so two saves from one page can be
 // asked for at once; they take the lock in the order they were asked, and each
 // compares the page's state as it stands when its turn begins against the
 // baseline the save before it left.
 function saveState() {
-    const turn = withLock("autistmask", saveStateOnce);
+    const turn = saveQueue.then(saveStateOnce);
    // The queue must advance even when a save rejects, or every save after
    // it queues behind a promise that never settles.
    saveQueue = turn.catch(() => {});
    // Every failed save is reported, whether or not the caller awaited this
    // one. The returned promise still rejects, so a caller that DOES await
    // keeps its own error handling.
@@ -20,7 +20,6 @@ const { toDecimals } = require("./transferAmount");
 // truncation without the approval screens' nonzero floor: the transaction
 // detail view is the authoritative record and already shows exact precision.
 const { truncateAmount: formatTxValue } = require("./amountDisplay");
 const { routerRelease } = require("./uniswap");
 // Ethereum addresses are case-insensitive: EIP-55 mixed case is a checksum
 // over the address, not part of its identity.  Every address comparison in
@@ -52,6 +51,7 @@ function parseTx(tx, addrLower, chainId) {
        }
        // Map known DEX methods to "Swap" for cleaner display
        const SWAP_METHODS = new Set([
            "execute",
            "swap",
            "swapExactTokensForTokens",
            "swapTokensForExactTokens",
@@ -59,16 +59,9 @@ function parseTx(tx, addrLower, chainId) {
            "swapTokensForExactETH",
            "swapExactTokensForETH",
            "swapETHForExactTokens",
            "multicall",
        ]);
-        // Multisigs, smart accounts and many other contracts also have an
+        const label = SWAP_METHODS.has(method)
        // `execute` or `multicall` method, so either is a swap only when sent
        // to a Universal Router on this transaction's network: the same
        // addresses the approval screen decodes a swap for.
        const isSwap =
            SWAP_METHODS.has(method) ||
            ((method === "execute" || method === "multicall") &&
                routerRelease(to, chainId) !== null);
        const label = isSwap
            ? "Swap"
            : method.charAt(0).toUpperCase() + method.slice(1);
        direction = "contract";
@@ -2,11 +2,11 @@
 // encoded with.
 //
 // A token amount is a decimal string plus a scale, and the two come from
-// different places. The confirmation screen renders the amount, the symbol and
+// different places. The confirmation screen renders the amount, the balance and
-// the balance it reads from the node with the block explorer's cached metadata
+// the symbol from the block explorer's cached metadata (see
-// (see fetchTokenBalances() in balances.js); the transfer used to be encoded
+// fetchTokenBalances() in balances.js); the transfer used to be encoded from
-// from decimals() read off the contract at signing time, and nothing compared
+// decimals() read off the contract at signing time, and nothing compared the
-// the two. A token whose on-chain scale differs from the cached one — an
+// two. A token whose on-chain scale differs from the cached one — an
 // upgradeable or proxy token, a caller-dependent one, a stale or wrong explorer
 // entry — therefore signed an amount that was never displayed, off by a power
 // of ten for every decimal place of disagreement.
@@ -111,8 +111,8 @@ function isValidAmount(amount, tokenDecimals = null) {
 // The most ETH a send can carry: the exact balance minus the fee reserve from
 // feeReserveWei(), as a decimal string, so validateTransfer() passes it with
-// exactly that reserve left behind. `ethBalance` is an exact decimal string as
+// exactly that reserve left behind. `ethBalance` is the exact decimal string
-// formatEther() writes it, never a rounded one. Null when the balance does not
+// balances.js stores, never a rounded one. Null when the balance does not
 // leave anything to send once the fee is paid, or when either input is
 // unusable.
 function maxEthAmount(ethBalance, feeWei) {
@@ -291,6 +291,7 @@ async function confirmSend(from, selected) {
        to: RECIPIENT,
        amount: "0.5",
        token: "ETH",
        balance: "1.0",
    });
    await settle();
    node("confirm-tx-password").value = PASSWORD;
@@ -442,25 +443,11 @@ describe("a confirmation screen whose From is not the selected address", () => {
        expect(Transaction.from(signed).from).toBe(derived(1).address);
    });
    // The refusal's sentence is fixed in index.html, in a box of its own that
    // holds its space from the first paint, so showing it moves nothing.
    test("nothing is sent when the selected wallet does not hold it", async () => {
        expect(await confirmSend(derived(5).address, 0)).toBeUndefined();
-        expect(node("confirm-from-address-error").style.visibility).toBe(
+        expect(node("confirm-tx-password-error").textContent).toBe(
-            "visible",
+            "The selected wallet does not hold the From address above, " +
-        );
+                "so nothing was sent. Please go back and send again.",
        expect(node("confirm-tx-password-error").textContent).toBe("");
        // Reviewing a send again draws the screen again, which hides it.
        confirmTx.show({
            from: derived(0).address,
            to: RECIPIENT,
            amount: "0.5",
            token: "ETH",
        });
        await settle();
        expect(node("confirm-from-address-error").style.visibility).toBe(
            "hidden",
        );
    });
 });
@@ -68,13 +68,10 @@ function swapData(amountIn, amountOutMin) {
 }
 function swapDetail(amountIn, amountOutMin, label) {
    // Sent by the address the swap pays, so the output is the user's.
    const decoded = uniswap.decode(
        swapData(amountIn, amountOutMin),
        ROUTER,
        "0x1",
        {},
        RECIPIENT,
    );
    return decoded.details.find((d) => d.label === label);
 }
@@ -1,270 +0,0 @@
 // The approval screen for a site's Sepolia token transfer while Ethereum
 // Mainnet is active.
 //
 // The screen named the token, and scaled its amount, from the active network's
 // tracked tokens and balances, so a token the wallet tracks on Sepolia read as
 // an unknown token with its amount in base units, and the screens after it
 // labelled the amount `?` (https://git.eeqj.de/sneak/AutistMask/issues/629).
 // It now uses what the wallet knows of the tokens on the network the
 // transaction is for.
 //
 // Its address links opened the active network's explorer
 // (https://git.eeqj.de/sneak/AutistMask/issues/631). They now open the
 // explorer of the network the transaction is for.
 //
 // Driven through the real approval screen, password and Confirm included,
 // against a minimal DOM stub in the shape tests/swapStatusAmount.test.js uses.
 // The vault is mocked so that no password has to be hashed.
 jest.mock("../src/shared/vault", () => ({
    decryptWithPassword: jest.fn(),
 }));
 globalThis.chrome = {
    storage: { local: { get: async () => ({}), set: async () => {} } },
 };
 const { Interface } = require("ethers");
 const { state } = require("../src/shared/state");
 const { NETWORKS } = require("../src/shared/networks");
 const { decryptWithPassword } = require("../src/shared/vault");
 const approval = require("../src/popup/views/approval");
 const txStatus = require("../src/popup/views/txStatus");
 // A well-known test phrase, and its first address.
 const PHRASE = "test test test test test test test test test test test junk";
 const FROM = "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266";
 const RECIPIENT = "0x711e691962E5c054b78071C789A0C8CE657377aD";
 // A token the bundled token list does not name.
 const TOKEN = "0x74de5d4FCbf63E00296fd95d33236B9794016631";
 // FROM sends 1234.5 of the 6-decimal token to RECIPIENT.
 const TRANSFER_DATA = new Interface([
    "function transfer(address to, uint256 amount)",
 ]).encodeFunctionData("transfer", [RECIPIENT, 1234500000n]);
 function makeElement(id) {
    const classes = new Set();
    const el = {
        id,
        textContent: "",
        value: "",
        innerHTML: "",
        disabled: false,
        style: {},
        dataset: {},
        listeners: {},
        classList: {
            add: (...names) => names.forEach((n) => classes.add(n)),
            remove: (...names) => names.forEach((n) => classes.delete(n)),
            contains: (n) => classes.has(n),
            toggle: (n, force) => {
                const on = force === undefined ? !classes.has(n) : force;
                if (on) classes.add(n);
                else classes.delete(n);
                return on;
            },
        },
        addEventListener: (name, fn) => {
            el.listeners[name] = el.listeners[name] || [];
            el.listeners[name].push(fn);
        },
        querySelectorAll: () => [],
        appendChild: () => {},
    };
    // Views reach for .parentElement to hide whole sections.
    Object.defineProperty(el, "parentElement", {
        get: () => node(id + "-parent"),
    });
    return el;
 }
 function makeDocument() {
    const els = new Map();
    return {
        getElementById(id) {
            // The debug banner is created on demand by helpers.js; absent
            // is the state a non-debug, non-testnet popup is in.
            if (id === "debug-banner") return null;
            if (!els.has(id)) els.set(id, makeElement(id));
            return els.get(id);
        },
        createElement: () => makeElement("created"),
        body: { prepend: () => {} },
    };
 }
 function node(id) {
    return globalThis.document.getElementById(id);
 }
 function click(id) {
    return Promise.all((node(id).listeners.click || []).map((fn) => fn()));
 }
 // One line of the decoded details: its label and what is drawn under it.
 function decodedLine(label) {
    return node("approve-tx-decoded-details")
        .innerHTML.split('<div class="mb-2">')
        .find((line) =>
            line.startsWith(`<div class="text-muted">${label}</div>`),
        );
 }
 // Open the approval screen, with Ethereum Mainnet active and FROM holding
 // `tokenBalances` there, for the site's transaction sending TRANSFER_DATA to
 // the token, on Sepolia unless `chainId` names another chain. Confirm answers
 // the signed transaction with a failure, which leads to the error screen.
 async function showTokenTransfer(
    tokenBalances = [],
    chainId = NETWORKS.sepolia.chainId,
 ) {
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" }, close: () => {} };
    globalThis.chrome.runtime = {
        connect: () => ({ postMessage: () => {} }),
        sendMessage: (msg, reply) => {
            if (!reply) return;
            if (msg.type !== "AUTISTMASK_GET_APPROVAL") {
                return reply({
                    error: "The transaction could not be sent.",
                    retryable: false,
                });
            }
            reply({
                type: "tx",
                origin: "https://dapp.example",
                isPhishingDomain: false,
                approvedFrom: FROM,
                approvedTx: {
                    type: 2,
                    from: FROM,
                    chainId,
                    nonce: "0x7",
                    gasLimit: "0x30d40",
                    maxPriorityFeePerGas: "0x3b9aca00",
                    maxFeePerGas: "0x77359400",
                    to: TOKEN,
                    value: "0x0",
                    data: TRANSFER_DATA,
                    accessList: [],
                },
            });
        },
    };
    state.networkId = "mainnet";
    state.activeAddress = FROM;
    state.wallets = [
        {
            type: "hd",
            name: "Wallet 1",
            xpub: "xpub-wallet-1",
            encryptedSecret: "encrypted-secret-1",
            nextIndex: 1,
            addresses: [
                { address: FROM, index: 0, balance: "0", tokenBalances },
            ],
        },
    ];
    state.currentView = null;
    txStatus.init({ doRefreshAndRender: () => {} });
    approval.init({});
    await approval.show(1);
 }
 async function confirm() {
    decryptWithPassword.mockResolvedValue(PHRASE);
    node("approve-tx-password").value = "any password";
    await click("btn-approve-tx");
 }
 beforeEach(() => {
    state.trackedTokens = [];
    state.networkTrackedTokens = {};
 });
 describe("a token tracked on Sepolia only", () => {
    beforeEach(() => {
        state.networkTrackedTokens = {
            sepolia: [{ address: TOKEN, symbol: "TDOL", decimals: 6 }],
        };
    });
    test("is named on the Contract line and the decoded Token line, with its amount at its scale", async () => {
        await showTokenTransfer();
        expect(node("approve-tx-to").innerHTML).toContain(
            '<div class="font-bold mb-1">TDOL</div>',
        );
        expect(decodedLine("Token")).toContain(
            '<div class="font-bold">TDOL</div>',
        );
        expect(decodedLine("Amount")).toContain(
            '<div class="font-bold">1234.5000 TDOL</div>',
        );
    });
    test("labels the amount on the error screen that follows", async () => {
        await showTokenTransfer();
        await confirm();
        expect(state.currentView).toBe("error-tx");
        expect(node("error-tx-summary").textContent).toBe("1234.5000 TDOL");
    });
 });
 // The same contract address on mainnet is another token, so what the wallet
 // tracks and holds there names nothing on Sepolia.
 test("a token tracked and held on mainnet only is not named, and its amount is in base units", async () => {
    state.trackedTokens = [{ address: TOKEN, symbol: "MDOL", decimals: 18 }];
    await showTokenTransfer([
        { address: TOKEN, symbol: "MDOL", decimals: 18, balance: "1.0" },
    ]);
    expect(node("approve-tx-to").innerHTML).not.toContain("MDOL");
    expect(decodedLine("Token")).toContain(
        '<div class="font-bold">Unknown token</div>',
    );
    expect(decodedLine("Amount")).toContain(
        '<div class="font-bold">1234500000 base units (decimals unknown)</div>',
    );
 });
 // The From and Contract lines, and the decoded Token and Recipient lines.
 test("every address links to the Sepolia explorer", async () => {
    await showTokenTransfer();
    const sepolia = NETWORKS.sepolia.explorerUrl;
    expect(node("approve-tx-from").innerHTML).toContain(
        `href="${sepolia}/address/${FROM}"`,
    );
    expect(node("approve-tx-to").innerHTML).toContain(
        `href="${sepolia}/address/${TOKEN}"`,
    );
    expect(decodedLine("Token")).toContain(
        `href="${sepolia}/address/${TOKEN}"`,
    );
    expect(decodedLine("Recipient")).toContain(
        `href="${sepolia}/address/${RECIPIENT}"`,
    );
    for (const id of [
        "approve-tx-from",
        "approve-tx-to",
        "approve-tx-decoded-details",
    ]) {
        expect(node(id).innerHTML).not.toContain(NETWORKS.mainnet.explorerUrl);
    }
 });
 // Chain id 1337 names no network here, so it has no explorer to link to.
 test("a transaction on a chain id that names no network is shown with no address links", async () => {
    await showTokenTransfer([], "0x539");
    expect(state.currentView).toBe("approve-tx");
    expect(node("approve-tx-network").textContent).toBe(
        "Unknown network (chain id 1337)",
    );
    expect(node("approve-tx-from").innerHTML).toContain(FROM);
    for (const id of [
        "approve-tx-from",
        "approve-tx-to",
        "approve-tx-decoded-details",
    ]) {
        expect(node(id).innerHTML).not.toContain("href=");
    }
 });
@@ -1,192 +0,0 @@
 // The USD value on the approval screen's Value and Network fee lines, for a
 // site's ETH send.
 //
 // It was worked out from the four-decimal figure the line shows, at the price
 // on the active network, so the same value read a few cents different here than
 // on the confirmation screen, which prices the exact amount at the price on the
 // transaction's own network, and a transaction on another network than the
 // active one was priced at the active one's rate, its fee too
 // (https://git.eeqj.de/sneak/AutistMask/issues/614).
 //
 // Driven through the real approval screen, against a minimal DOM stub in the
 // shape tests/approvalTokenNetwork.test.js uses.
 globalThis.chrome = {
    storage: { local: { get: async () => ({}), set: async () => {} } },
 };
 const { state } = require("../src/shared/state");
 const { NETWORKS } = require("../src/shared/networks");
 const { prices, clearPrices } = require("../src/shared/prices");
 const approval = require("../src/popup/views/approval");
 const FROM = "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266";
 const RECIPIENT = "0x711e691962E5c054b78071C789A0C8CE657377aD";
 function makeElement(id) {
    const classes = new Set();
    const el = {
        id,
        textContent: "",
        value: "",
        innerHTML: "",
        disabled: false,
        style: {},
        dataset: {},
        listeners: {},
        classList: {
            add: (...names) => names.forEach((n) => classes.add(n)),
            remove: (...names) => names.forEach((n) => classes.delete(n)),
            contains: (n) => classes.has(n),
            toggle: (n, force) => {
                const on = force === undefined ? !classes.has(n) : force;
                if (on) classes.add(n);
                else classes.delete(n);
                return on;
            },
        },
        addEventListener: (name, fn) => {
            el.listeners[name] = el.listeners[name] || [];
            el.listeners[name].push(fn);
        },
        querySelectorAll: () => [],
        appendChild: () => {},
    };
    // Views reach for .parentElement to hide whole sections.
    Object.defineProperty(el, "parentElement", {
        get: () => node(id + "-parent"),
    });
    return el;
 }
 function makeDocument() {
    const els = new Map();
    return {
        getElementById(id) {
            // The debug banner is created on demand by helpers.js; absent
            // is the state a non-debug, non-testnet popup is in.
            if (id === "debug-banner") return null;
            if (!els.has(id)) els.set(id, makeElement(id));
            return els.get(id);
        },
        createElement: () => makeElement("created"),
        body: { prepend: () => {} },
    };
 }
 function node(id) {
    return globalThis.document.getElementById(id);
 }
 // Open the approval screen, with the network `networkId` active, for the
 // site's transaction sending 1.23414 ETH to RECIPIENT on the chain `chainId`.
 async function showEthSend(chainId, networkId) {
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" }, close: () => {} };
    globalThis.chrome.runtime = {
        connect: () => ({ postMessage: () => {} }),
        sendMessage: (msg, reply) => {
            if (!reply) return;
            reply({
                type: "tx",
                origin: "https://dapp.example",
                isPhishingDomain: false,
                approvedFrom: FROM,
                approvedTx: {
                    type: 2,
                    from: FROM,
                    chainId,
                    nonce: "0x7",
                    gasLimit: "0x5208",
                    maxPriorityFeePerGas: "0x3b9aca00",
                    maxFeePerGas: "0x77359400",
                    to: RECIPIENT,
                    value: "1234140000000000000",
                    data: "0x",
                    accessList: [],
                },
            });
        },
    };
    state.networkId = networkId;
    state.activeAddress = FROM;
    state.wallets = [
        {
            type: "hd",
            name: "Wallet 1",
            xpub: "xpub-wallet-1",
            encryptedSecret: "encrypted-secret-1",
            nextIndex: 1,
            addresses: [{ address: FROM, index: 0, balance: "0" }],
        },
    ];
    state.trackedTokens = [];
    state.networkTrackedTokens = {};
    state.currentView = null;
    approval.init({});
    await approval.show(1);
 }
 beforeEach(() => {
    prices.ETH = 2000;
 });
 afterEach(() => {
    clearPrices();
 });
 // 1.23414 ETH reads 1.2341 ETH. At $2,000 the exact value is $2,468.28, the
 // figure the confirmation screen shows for it; the shown figure would be
 // $2,468.20.
 test.each([
    [
        "a mainnet transaction is priced from its exact value",
        NETWORKS.mainnet.chainId,
        "mainnet",
        "1.2341 ETH ($2,468.28)",
    ],
    [
        "a mainnet transaction shown with Sepolia active is priced at the mainnet price",
        NETWORKS.mainnet.chainId,
        "sepolia",
        "1.2341 ETH ($2,468.28)",
    ],
    [
        "a Sepolia transaction shown with mainnet active has no USD value",
        NETWORKS.sepolia.chainId,
        "mainnet",
        "1.2341 SepoliaETH",
    ],
    // Chain id 1337 names no network here, so nothing knows its price.
    [
        "a transaction on a chain id that names no network has no USD value",
        "0x539",
        "mainnet",
        "1.2341 ETH",
    ],
 ])("%s", async (_label, chainId, networkId, expected) => {
    await showEthSend(chainId, networkId);
    expect(state.currentView).toBe("approve-tx");
    expect(node("approve-tx-value").textContent).toBe(expected);
 });
 // The Network fee line is priced on the transaction's network too. 21000 gas at
 // up to 2 gwei is 0.000042 ETH, $0.08 at $2,000.
 test.each([
    [
        "the fee of a mainnet transaction shown with Sepolia active is priced at the mainnet price",
        NETWORKS.mainnet.chainId,
        "sepolia",
        "0.00004 ETH ($0.08)",
    ],
    [
        "the fee of a Sepolia transaction shown with mainnet active has no USD value",
        NETWORKS.sepolia.chainId,
        "mainnet",
        "0.00004 SepoliaETH",
    ],
 ])("%s", async (_label, chainId, networkId, expected) => {
    await showEthSend(chainId, networkId);
    expect(state.currentView).toBe("approve-tx");
    expect(node("approve-tx-fee").textContent).toBe(expected);
 });
@@ -154,14 +154,7 @@ describe("Back onto a view the reopened popup never rendered", () => {
    test("Back onto the transaction detail renders it", () => {
        reopenedOn("settings", ["main", "transaction"], {
-            viewData: {
+            viewData: { tx: { hash: "0xdead", from: ADDRESS, to: ADDRESS } },
                tx: {
                    hash: "0xdead",
                    from: ADDRESS,
                    to: ADDRESS,
                    chainId: "0x1",
                },
            },
        });
        goBack();
        expect(calls).toEqual(["transactionDetail"]);
@@ -204,21 +204,17 @@ describe("a chain switch on a worker that never loaded state", () => {
        expect(after.rpcUrl).toBe(SEPOLIA.defaultRpcUrl);
        // And it took nothing else with it. Without the load these come back
-        // as [], {}, {} and "system" from DEFAULT_STATE — every wallet in the
+        // as [], {}, [] and "system" from DEFAULT_STATE — every wallet in the
        // extension gone, encrypted secrets included.
        expect(after.wallets).toEqual(walletFixture());
        expect(after.hasWallet).toBe(true);
        expect(after.activeAddress).toBe(ADDRESS);
        expect(after.allowedSites).toEqual({ [ADDRESS]: [CONNECTED_ORIGIN] });
-        expect(after.networkTrackedTokens).toEqual({
+        expect(after.trackedTokens).toEqual([
-            mainnet: [{ address: TOKEN, symbol: "DAI", decimals: 18 }],
+            { address: TOKEN, symbol: "DAI", decimals: 18 },
-        });
+        ]);
        expect(after.theme).toBe("dark");
        // The mainnet token is tracked on mainnet only: Sepolia starts with
        // none of its own.
        expect(after.trackedTokens).toEqual([]);
        // The user's mainnet endpoint is remembered rather than replaced by
        // the public default, so switching back returns it.
        expect(after.networkEndpoints.mainnet).toEqual({
@@ -230,9 +226,6 @@ describe("a chain switch on a worker that never loaded state", () => {
        expect(bg.persisted().rpcUrl).toBe(CUSTOM_RPC);
        expect(bg.persisted().blockscoutUrl).toBe(CUSTOM_BLOCKSCOUT);
        expect(bg.persisted().wallets).toEqual(walletFixture());
        expect(bg.persisted().trackedTokens).toEqual([
            { address: TOKEN, symbol: "DAI", decimals: 18 },
        ]);
    });
    test("compares the requested chain against the stored one, not the default", async () => {
@@ -1,415 +0,0 @@
 // The amount of the wallet's own send on the confirmation, wait, success and
 // error screens (https://git.eeqj.de/sneak/AutistMask/issues/522).
 //
 // These screens printed the text from Send's amount field as it was typed or
 // filled in: `0.5 ETH`, or `1.234147890123456789 ETH` after Max, where the
 // approval screen shows a site's send as `0.5000 ETH`. They now show it to four
 // decimal places with the nonzero floor, as the approval screen does, and the
 // transaction is still signed for the exact amount.
 //
 // Driven through the real Send screen, confirmation screen, Sign & Send and
 // wait screen, with only the node, the explorer and the DOM stubbed.
 "use strict";
 // What the stub node answers, and the signed transactions it was handed. The
 // token's own decimals() answers 6, as the explorer does.
 const mockNode = {
    balanceWei: 0n,
    tokenUnits: 0n,
    tokenDecimals: 6n,
    broadcast: [],
    broadcastError: null,
    receipt: null,
 };
 // The token rows the stub explorer reports for the address.
 const mockExplorer = { items: [] };
 jest.mock("ethers", () => {
    const actual = jest.requireActual("ethers");
    // The selector of decimals(); every other contract call is balanceOf().
    const DECIMALS = "0x313ce567";
    class StubProvider {
        async getBalance() {
            return mockNode.balanceWei;
        }
        async call(tx) {
            return actual.AbiCoder.defaultAbiCoder().encode(
                ["uint256"],
                [
                    tx.data.startsWith(DECIMALS)
                        ? mockNode.tokenDecimals
                        : mockNode.tokenUnits,
                ],
            );
        }
        async lookupAddress() {
            return null;
        }
        // 20 gwei reserved per gas.
        async getFeeData() {
            return {
                maxFeePerGas: 20000000000n,
                maxPriorityFeePerGas: 1000000000n,
                gasPrice: 10000000000n,
            };
        }
        async estimateGas() {
            return 21000n;
        }
        async getCode() {
            return "0x";
        }
        async getTransactionCount() {
            return 1;
        }
        async getNetwork() {
            return { chainId: 1n };
        }
        async broadcastTransaction(signed) {
            if (mockNode.broadcastError) throw mockNode.broadcastError;
            mockNode.broadcast.push(signed);
            return { hash: "0x" + "ab".repeat(32) };
        }
        async getTransactionReceipt() {
            return mockNode.receipt;
        }
    }
    return {
        ...actual,
        JsonRpcProvider: StubProvider,
        Network: { from: () => ({}) },
    };
 });
 jest.mock("../src/shared/log", () => ({
    log: {
        debugf: () => {},
        infof: () => {},
        warnf: () => {},
        errorf: () => {},
    },
    // The explorer's token list, which refreshBalances() also fetches.
    debugFetch: jest.fn(async () => ({
        ok: true,
        status: 200,
        json: async () => mockExplorer.items,
    })),
    urlOrigin: () => "",
    setRuntimeDebug: () => {},
    isDebug: () => false,
 }));
 // The confirmation screen's Etherscan label lookup is the only fetch() these
 // screens make; it fails, as it does offline.
 global.fetch = jest.fn(() => {
    throw new Error("tests must not perform network requests");
 });
 const { makeStorageStub } = require("./support/storageStub");
 global.chrome = { storage: makeStorageStub(), runtime: { sendMessage() {} } };
 // A stub DOM: every id resolves to a recording element.
 const elements = new Map();
 function makeEl(id) {
    const handlers = new Map();
    return {
        id,
        textContent: "",
        innerHTML: "",
        value: "",
        disabled: false,
        style: {},
        dataset: {},
        classList: {
            add() {},
            remove() {},
            toggle() {},
            contains: () => false,
        },
        handlers,
        children: [],
        addEventListener(name, fn) {
            handlers.set(name, fn);
        },
        appendChild(child) {
            this.children.push(child);
            return child;
        },
        querySelectorAll: () => [],
        querySelector: () => null,
        remove() {},
        focus() {},
        // The success screen hides whole sections through .parentElement.
        get parentElement() {
            return global.document.getElementById(id + "-parent");
        },
    };
 }
 global.document = {
    getElementById(id) {
        if (!elements.has(id)) elements.set(id, makeEl(id));
        return elements.get(id);
    },
    createElement: (tag) => makeEl(tag),
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
 global.navigator.clipboard = { writeText() {} };
 const {
    Interface,
    Transaction,
    Wallet,
    getAddress,
    parseEther,
 } = require("ethers");
 const { refreshBalances } = require("../src/shared/balances");
 const { encryptWithPassword } = require("../src/shared/vault");
 const { state } = require("../src/shared/state");
 const { clearPrices } = require("../src/shared/prices");
 const send = require("../src/popup/views/send");
 const confirmTx = require("../src/popup/views/confirmTx");
 const txStatus = require("../src/popup/views/txStatus");
 const PRIVATE_KEY = "0x" + "11".repeat(32);
 const HOLDER = new Wallet(PRIVATE_KEY).address;
 const RECIPIENT = "0xC0FfEE0000000000000000000000000000c0fFEe";
 const PASSWORD = "correct horse battery staple";
 const GWEI = 1000000000n;
 // 1.234567890123456789 ETH.
 const BALANCE_WEI = 1234567890123456789n;
 // A token the bundled list does not know, with enough holders to be listed,
 // at 6 decimal places.
 const TOKEN = "0x" + "d".repeat(40);
 const transferIface = new Interface([
    "function transfer(address to, uint256 amount)",
 ]);
 let encryptedSecret;
 // The confirmation screen Review leads to, once shown.
 let confirmed = null;
 function el(id) {
    return global.document.getElementById(id);
 }
 function text(id) {
    return el(id).textContent;
 }
 // show() reads the balance and then estimates the fee without awaiting
 // either; this lets both settle.
 async function settle() {
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
 }
 // The address holds BALANCE_WEI and, when `tokenUnits` is given, that many
 // base units of TOKEN, fetched and stored where the popup stores them. Send
 // is then open for `token` ("ETH" or TOKEN) with the recipient entered.
 async function openSend(token, tokenUnits = null) {
    mockNode.balanceWei = BALANCE_WEI;
    mockNode.tokenUnits = tokenUnits ?? 0n;
    mockExplorer.items =
        tokenUnits === null
            ? []
            : [
                  {
                      value: String(tokenUnits),
                      token: {
                          type: "ERC-20",
                          address_hash: TOKEN,
                          symbol: "TOK",
                          name: "Token",
                          decimals: "6",
                          holders_count: "50000",
                      },
                  },
              ];
    state.wallets = [
        {
            type: "key",
            name: "Wallet 1",
            encryptedSecret,
            addresses: [{ address: HOLDER }],
        },
    ];
    state.selectedWallet = 0;
    state.selectedAddress = 0;
    await refreshBalances(
        state.wallets,
        "https://rpc.example.invalid",
        "https://blockscout.example/api/v2",
        state.trackedTokens,
        "mainnet",
    );
    send.init({
        showConfirmTx: (info) => (confirmed = info),
        pageClosed: new AbortController().signal,
    });
    confirmTx.init({});
    send.resetSendValidation();
    state.currentView = "send";
    state.selectedToken = token;
    el("send-to").value = RECIPIENT;
    el("send-amount").value = "";
 }
 // Press Review and show the confirmation screen with its fee estimate settled.
 async function review() {
    await el("btn-send-review").handlers.get("click")();
    confirmTx.show(confirmed);
    await settle();
 }
 async function signAndSend() {
    el("confirm-tx-password").value = PASSWORD;
    await el("btn-confirm-send").handlers.get("click")();
 }
 // The one transaction the stub node was handed.
 function broadcastTx() {
    expect(mockNode.broadcast).toHaveLength(1);
    return Transaction.from(mockNode.broadcast[0]);
 }
 beforeAll(async () => {
    encryptedSecret = await encryptWithPassword(PRIVATE_KEY, PASSWORD);
 });
 beforeEach(() => {
    elements.clear();
    clearPrices();
    confirmed = null;
    state.selectedToken = null;
    state.trackedTokens = [];
    state.fraudContracts = [];
    state.currentView = null;
    mockNode.broadcast = [];
    mockNode.broadcastError = null;
    mockNode.receipt = null;
    txStatus.init({
        doRefreshAndRender() {},
        pageClosed: new AbortController().signal,
    });
 });
 afterEach(() => {
    txStatus.endWait();
 });
 describe("the wallet's own send shows its amount to four decimal places", () => {
    test("for a short amount", async () => {
        await openSend("ETH");
        el("send-amount").value = "0.5";
        await review();
        expect(text("confirm-amount")).toBe("0.5000 ETH");
        await signAndSend();
        expect(text("wait-tx-summary")).toBe("0.5000 ETH");
        expect(broadcastTx().value).toBe(parseEther("0.5"));
    });
    // Send accepts both. The approval screen writes the same value `0.5000`.
    test.each([".5", "00.5"])("for an amount typed as %s", async (typed) => {
        await openSend("ETH");
        el("send-amount").value = typed;
        await review();
        expect(text("confirm-amount")).toBe("0.5000 ETH");
        await signAndSend();
        expect(text("wait-tx-summary")).toBe("0.5000 ETH");
        expect(broadcastTx().value).toBe(parseEther("0.5"));
    });
    test("for a token amount typed as .5", async () => {
        // 100 TOK.
        await openSend(TOKEN, 100000000n);
        el("send-amount").value = ".5";
        await review();
        expect(text("confirm-amount")).toBe("0.5000 TOK");
        await signAndSend();
        expect(text("wait-tx-summary")).toBe("0.5000 TOK");
        const [, amount] = transferIface.decodeFunctionData(
            "transfer",
            broadcastTx().data,
        );
        expect(amount).toBe(500000n);
    });
    test("for a Max amount with many decimals", async () => {
        await openSend("ETH");
        await el("btn-send-max").handlers.get("click")();
        // The balance minus 21000 gas at 20 gwei.
        expect(el("send-amount").value).toBe("1.234147890123456789");
        await review();
        expect(text("confirm-amount")).toBe("1.2341 ETH");
        await signAndSend();
        expect(text("wait-tx-summary")).toBe("1.2341 ETH");
        expect(broadcastTx().value).toBe(BALANCE_WEI - 21000n * 20n * GWEI);
    });
    // Cut to four decimals it would read 0.0000, so it is shown to its first
    // significant digit instead, and signed in full.
    test("for a tiny nonzero amount", async () => {
        await openSend("ETH");
        el("send-amount").value = "0.000012345";
        await review();
        expect(text("confirm-amount")).toBe("0.00001 ETH");
        await signAndSend();
        expect(text("wait-tx-summary")).toBe("0.00001 ETH");
        expect(broadcastTx().value).toBe(parseEther("0.000012345"));
    });
    test("for a token amount", async () => {
        // 100 TOK.
        await openSend(TOKEN, 100000000n);
        el("send-amount").value = "12.345678";
        await review();
        expect(text("confirm-amount")).toBe("12.3456 TOK");
        await signAndSend();
        expect(text("wait-tx-summary")).toBe("12.3456 TOK");
        const tx = broadcastTx();
        expect(tx.to).toBe(getAddress(TOKEN));
        const [to, amount] = transferIface.decodeFunctionData(
            "transfer",
            tx.data,
        );
        expect(to).toBe(RECIPIENT);
        expect(amount).toBe(12345678n);
    });
    test("on the success screen", async () => {
        await openSend("ETH");
        el("send-amount").value = "0.5";
        await review();
        await signAndSend();
        // A popup opened later resumes the wait, and the receipt is there.
        mockNode.receipt = { blockNumber: 21000000 };
        txStatus.restoreWait();
        await settle();
        expect(state.currentView).toBe("success-tx");
        expect(text("success-tx-summary")).toBe("0.5000 ETH");
    });
    test("on the error screen", async () => {
        await openSend("ETH");
        el("send-amount").value = "0.5";
        await review();
        mockNode.broadcastError = new Error("the node refused it");
        await signAndSend();
        expect(state.currentView).toBe("error-tx");
        expect(text("error-tx-summary")).toBe("0.5000 ETH");
    });
 });
@@ -11,115 +11,20 @@
 //
 // The check is driven here with a fake connected signer rather than a real
 // one: populateTransaction() returns the fees the node would have produced,
-// and sendTransaction() records whether the send actually happened.
+// and sendTransaction() records whether the send actually happened. The real
-//
+// DOM path around it — reading the fee error into the reserved errors box — is
-// The last test drives the real confirmation screen instead, with only the
+// covered by the Chrome e2e suite.
 // node and the DOM stubbed: a gas limit over its own bound at an ordinary fee
 // is refused in the same box as a fee over the bound
 // (https://git.eeqj.de/sneak/AutistMask/issues/583). That the box moves
 // nothing on the screen is checked by the Chrome e2e suite.
-// What the stub node quotes for that test: a gas limit of 150,000,000 at a
+globalThis.chrome = {
-// maximum fee of 2 gwei per gas, 0.3 ETH in all. And the signed transactions
+    storage: { local: { get: async () => ({}), set: async () => {} } },
 // it was handed.
 const mockNode = {
    gasLimit: 150000000n,
    maxFeePerGas: 2000000000n,
    broadcast: [],
 };
 jest.mock("ethers", () => {
    const actual = jest.requireActual("ethers");
    class StubProvider {
        constructor(url, network) {
            this.network = network;
        }
        async getNetwork() {
            return this.network;
        }
        async getBalance() {
            return actual.parseEther("5");
        }
        async getCode() {
            return "0x";
        }
        async getTransactionCount() {
            return 1;
        }
        async getFeeData() {
            return {
                maxFeePerGas: mockNode.maxFeePerGas,
                maxPriorityFeePerGas: 1000000000n,
                gasPrice: 1000000000n,
            };
        }
        async estimateGas() {
            return mockNode.gasLimit;
        }
        async broadcastTransaction(signed) {
            mockNode.broadcast.push(signed);
            return { hash: "0x" + "ab".repeat(32) };
        }
    }
    return { ...actual, JsonRpcProvider: StubProvider };
 });
 // The screens a send that was not refused goes on to.
 jest.mock("../src/popup/views/txStatus", () => ({
    showWait: jest.fn(),
    showError: jest.fn(),
 }));
 const { makeStorageStub } = require("./support/storageStub");
 global.chrome = { storage: makeStorageStub(), runtime: { sendMessage() {} } };
 global.fetch = jest.fn(() => {
    throw new Error("tests must not perform network requests");
 });
-// A stub DOM: every id resolves to a recording element.
+const { populateVerifyAndSend } = require("../src/popup/views/confirmTx");
 const elements = new Map();
 function makeEl(id) {
    const handlers = new Map();
    return {
        id,
        textContent: "",
        innerHTML: "",
        value: "",
        disabled: false,
        style: {},
        dataset: {},
        classList: {
            add() {},
            remove() {},
            toggle() {},
            contains: () => false,
        },
        handlers,
        addEventListener(name, fn) {
            handlers.set(name, fn);
        },
        querySelectorAll: () => [],
        remove() {},
    };
 }
 global.document = {
    getElementById(id) {
        if (!elements.has(id)) elements.set(id, makeEl(id));
        return elements.get(id);
    },
 };
 const { Wallet } = require("ethers");
 const { encryptWithPassword } = require("../src/shared/vault");
 const { state, loadState } = require("../src/shared/state");
 const txStatus = require("../src/popup/views/txStatus");
 const confirmTx = require("../src/popup/views/confirmTx");
 const { populateVerifyAndSend } = confirmTx;
 const {
    MAX_GAS_LIMIT,
    MAX_FEE_PER_GAS,
    MAX_TOTAL_FEE,
 } = require("../src/shared/approvalVerify");
@@ -193,69 +98,3 @@ describe("populateVerifyAndSend enforces the combined fee bound", () => {
        expect(signer.sent[0].gasLimit).toBe(under.gasLimit);
    });
 });
 describe("Sign & Send on the confirmation screen", () => {
    const PRIVATE_KEY = "0x" + "11".repeat(32);
    const PASSWORD = "correct horse battery staple";
    let encryptedSecret;
    beforeAll(async () => {
        await loadState();
        encryptedSecret = await encryptWithPassword(PRIVATE_KEY, PASSWORD);
    });
    function el(id) {
        return global.document.getElementById(id);
    }
    function shown(id) {
        return el(id).style.visibility === "visible";
    }
    // show() reads the balance and estimates the fee without awaiting
    // either; this lets both finish.
    async function settle() {
        for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
    }
    test("refuses a gas limit over its bound at an ordinary fee in the box for a refused gas limit or fee, and sends nothing", async () => {
        expect(mockNode.gasLimit).toBeGreaterThan(MAX_GAS_LIMIT);
        expect(mockNode.gasLimit * mockNode.maxFeePerGas).toBeLessThan(
            MAX_TOTAL_FEE,
        );
        const from = new Wallet(PRIVATE_KEY).address;
        state.wallets = [
            {
                type: "key",
                name: "Wallet 1",
                encryptedSecret,
                addresses: [{ address: from }],
            },
        ];
        state.selectedWallet = 0;
        state.selectedAddress = 0;
        confirmTx.init({});
        confirmTx.show({
            from,
            to: RECIPIENT,
            ensName: null,
            amount: "1",
            token: "ETH",
            tokenSymbol: null,
            tokenDecimals: null,
            max: false,
        });
        await settle();
        expect(el("btn-confirm-send").disabled).toBe(false);
        expect(shown("confirm-fee-bound-error")).toBe(false);
        el("confirm-tx-password").value = PASSWORD;
        await el("btn-confirm-send").handlers.get("click")();
        expect(shown("confirm-fee-bound-error")).toBe(true);
        expect(mockNode.broadcast).toEqual([]);
        expect(txStatus.showWait).not.toHaveBeenCalled();
        expect(txStatus.showError).not.toHaveBeenCalled();
    });
 });
@@ -1,221 +0,0 @@
 // A late answer for a confirmation screen the user has left changes nothing on
 // the screen shown since (https://git.eeqj.de/sneak/AutistMask/issues/575).
 //
 // The confirmation screen asks the node and the explorer about its transaction
 // without waiting for the answers: the recipient checks, which can show three
 // warning boxes, the balance read and the fee estimate. Back, a new recipient
 // and Review again show the screen for another transaction while those
 // questions may still be open. The recipient checks showed their boxes
 // whenever they answered, so a box about the first recipient could appear on
 // the second recipient's screen.
 //
 // Driven through the real confirmation screen, with only the node, the
 // explorer and the DOM stubbed. Each test holds back the first screen's answer
 // to one question, and gives it once the screen it tests is shown.
 "use strict";
 // The From address of every transaction here. The jest.mock() factory below
 // may only name outside variables whose names start with "mock".
 const mockFrom = "0x66133E8ea0f5D1d612D2502a968757D1048c214a";
 jest.mock("ethers", () => {
    const actual = jest.requireActual("ethers");
    // Every answer is a mock, so a test can hold one back. Every address has
    // sent one transaction and has no code, and only the From address holds
    // anything: 5 ETH.
    class StubProvider {}
    Object.assign(StubProvider.prototype, {
        getBalance: jest.fn(async (address) =>
            address === mockFrom ? actual.parseEther("5") : 0n,
        ),
        getCode: jest.fn(async () => "0x"),
        getTransactionCount: jest.fn(async () => 1),
        // 10 gwei expected, 20 gwei reserved per gas.
        getFeeData: jest.fn(async () => ({
            maxFeePerGas: 20000000000n,
            maxPriorityFeePerGas: 1000000000n,
            gasPrice: 10000000000n,
        })),
        estimateGas: jest.fn(async () => 21000n),
    });
    return { ...actual, JsonRpcProvider: StubProvider };
 });
 // An explorer address page whose title is `title`.
 function explorerPage(title) {
    return { ok: true, text: async () => "<title>" + title + "</title>" };
 }
 // The explorer labels no address.
 global.fetch = jest.fn(async () => explorerPage("Etherscan"));
 const { makeStorageStub } = require("./support/storageStub");
 global.chrome = { storage: makeStorageStub(), runtime: { sendMessage() {} } };
 // A stub DOM: every id resolves to a recording element.
 const elements = new Map();
 function makeEl(id) {
    return {
        id,
        textContent: "",
        innerHTML: "",
        value: "",
        disabled: false,
        style: {},
        dataset: {},
        classList: {
            add() {},
            remove() {},
            toggle() {},
            contains: () => false,
        },
        addEventListener() {},
        querySelectorAll: () => [],
        remove() {},
    };
 }
 global.document = {
    getElementById(id) {
        if (!elements.has(id)) elements.set(id, makeEl(id));
        return elements.get(id);
    },
 };
 const { JsonRpcProvider, parseEther } = require("ethers");
 const { loadState } = require("../src/shared/state");
 const confirmTx = require("../src/popup/views/confirmTx");
 const node = JsonRpcProvider.prototype;
 const FIRST = "0xC0FfEE0000000000000000000000000000c0fFEe";
 const SECOND = "0xE2E0000000000000000000000000000000000E2e";
 function el(id) {
    return global.document.getElementById(id);
 }
 function shown(id) {
    return el(id).style.visibility === "visible";
 }
 // Show the confirmation screen for 1 ETH to `to` on mainnet, as Review on the
 // Send screen does.
 function review(to) {
    confirmTx.show({
        from: mockFrom,
        to,
        ensName: null,
        amount: "1",
        token: "ETH",
        tokenSymbol: null,
        tokenDecimals: null,
        max: false,
    });
 }
 // show() does not wait for its questions; this lets every answer not held
 // back arrive.
 async function settle() {
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
 }
 // Hold back the next answer `question` gives. Returns the function that gives
 // it.
 function holdNextAnswer(question) {
    let give;
    question.mockImplementationOnce(() => new Promise((r) => (give = r)));
    return (answer) => give(answer);
 }
 beforeAll(async () => {
    await loadState();
 });
 beforeEach(() => {
    elements.clear();
 });
 // The three boxes the recipient checks show, each with the question whose
 // answer shows it for FIRST, and that answer. FIRST holds no ETH, so the
 // answer that it has sent no transaction is what shows the box saying so.
 describe.each([
    {
        box: "confirm-contract-warning",
        question: node.getCode,
        answer: "0x6080604052",
    },
    {
        box: "confirm-recipient-warning",
        question: node.getTransactionCount,
        answer: 0,
    },
    {
        box: "confirm-etherscan-warning",
        question: global.fetch,
        answer: explorerPage(
            "Fake_Phishing1 | Address: " + FIRST + " | Etherscan",
        ),
    },
 ])("the $box box", ({ box, question, answer }) => {
    test("is shown when the answer about the recipient arrives while its screen is shown", async () => {
        const give = holdNextAnswer(question);
        review(FIRST);
        await settle();
        expect(shown(box)).toBe(false);
        give(answer);
        await settle();
        expect(shown(box)).toBe(true);
    });
    test("is not shown on the next recipient's screen when the answer about the first arrives after that screen is shown", async () => {
        const give = holdNextAnswer(question);
        review(FIRST);
        await settle();
        review(SECOND);
        await settle();
        expect(shown(box)).toBe(false);
        give(answer);
        await settle();
        expect(shown(box)).toBe(false);
    });
 });
 test("a balance read answered after the next screen is shown leaves that screen's balance and balance check as they are", async () => {
    const give = holdNextAnswer(node.getBalance);
    review(FIRST);
    await settle();
    review(SECOND);
    await settle();
    expect(el("confirm-balance").textContent).toBe("5.0000 ETH");
    give(parseEther("0.5"));
    await settle();
    expect(el("confirm-balance").textContent).toBe("5.0000 ETH");
    expect(shown("confirm-balance-error")).toBe(false);
    expect(el("btn-confirm-send").disabled).toBe(false);
 });
 test("a fee estimate answered after the next screen is shown leaves that screen's fee as it is", async () => {
    const give = holdNextAnswer(node.getFeeData);
    review(FIRST);
    await settle();
    review(SECOND);
    await settle();
    expect(el("confirm-fee-amount").textContent).toBe("~0.0002 ETH");
    // 100 times the fee the second screen was quoted.
    give({
        maxFeePerGas: 2000000000000n,
        maxPriorityFeePerGas: 100000000000n,
        gasPrice: 1000000000000n,
    });
    await settle();
    expect(el("confirm-fee-amount").textContent).toBe("~0.0002 ETH");
    expect(el("confirm-fee-reserve").textContent).toBe(
        "up to 0.0004 ETH reserved",
    );
 });
@@ -7,85 +7,25 @@
 // reviewed on Sepolia went out as 1 ETH on mainnet once mainnet was chosen in
 // Settings in between.
 //
 // The same holds when the popup was closed after the switch and reopened, and
 // Back drew the screen again from the transaction it saved
 // (https://git.eeqj.de/sneak/AutistMask/issues/586): the screen was drawn for
 // the new network, and Sign & Send sent the reviewed transfer there. Drawn
 // again, the screen describes the transaction entirely on the network it was
 // reviewed for, because choosing that network again in Settings and pressing
 // Back only unhides it, and Sign & Send then sends from it.
 //
 // Its balance line and balance check are that network's balance, read from
 // that network's node each time the screen is drawn
 // (https://git.eeqj.de/sneak/AutistMask/issues/558), not the balance Send
 // handed over. The fee estimate after the read stays on that network when
 // the network is switched while the read runs.
 //
 // Driven through the real confirmation screen, signer and chain switch, with
-// only the node, fetch and the DOM stubbed. The stub node is on the network
+// only the node and the DOM stubbed. The stub node is on the network its
-// its provider was built for, so a broadcast records the network it went to,
+// provider was built for, so a broadcast records the network it went to.
 // and a balance read answers with that network's balance.
 "use strict";
-// The questions the stub node was asked for the balance, the fee and the
+// The signed transactions the stub node was handed, with its network's chain id.
-// recipient checks, by method, network name and RPC URL, in order. The
+const mockNode = { broadcast: [] };
 // balances it reports on each network, by network name: ETH in wei and the
 // token in its base units. The signed transactions it was handed, with its
 // network's chain id and RPC URL. And whether it quotes fees as a network
 // with no type-2 pricing does.
 const mockNode = {
    asked: [],
    balanceWei: {},
    tokenUnits: {},
    broadcast: [],
    legacyFees: false,
 };
 jest.mock("ethers", () => {
    const actual = jest.requireActual("ethers");
    // The selector of balanceOf(address).
    const BALANCE_OF = "0x70a08231";
    class StubProvider {
        constructor(url, network) {
            this.url = url;
            this.network = network;
        }
        record(method) {
            mockNode.asked.push({
                method,
                network: this.network.name,
                url: this.url,
            });
        }
        async getNetwork() {
            return this.network;
        }
        async getBalance() {
            this.record("getBalance");
            return mockNode.balanceWei[this.network.name];
        }
        // balanceOf() is the one contract call the screen makes before Sign
        // & Send.
        async call(tx) {
            if (!tx.data.startsWith(BALANCE_OF)) {
                throw new Error("the stub node answers only balanceOf()");
            }
            this.record("balanceOf");
            return actual.AbiCoder.defaultAbiCoder().encode(
                ["uint256"],
                [mockNode.tokenUnits[this.network.name]],
            );
        }
        async getFeeData() {
            this.record("getFeeData");
            if (mockNode.legacyFees) {
                return {
                    maxFeePerGas: null,
                    maxPriorityFeePerGas: null,
                    gasPrice: 10000000000n,
                };
            }
            return {
                maxFeePerGas: 20000000000n,
                maxPriorityFeePerGas: 1000000000n,
@@ -96,22 +36,16 @@ jest.mock("ethers", () => {
            return 21000n;
        }
        async getCode() {
            this.record("getCode");
            return "0x";
        }
        async getTransactionCount() {
            this.record("getTransactionCount");
            return 1;
        }
        async lookupAddress() {
            return null;
        }
        async broadcastTransaction(signed) {
-            mockNode.broadcast.push({
+            mockNode.broadcast.push({ chainId: this.network.chainId, signed });
                chainId: this.network.chainId,
                url: this.url,
                signed,
            });
            return { hash: "0x" + "ab".repeat(32) };
        }
    }
@@ -141,8 +75,6 @@ jest.mock("../src/popup/views/txStatus", () => ({
    showError: jest.fn(),
 }));
 // The Etherscan label check is its only caller here: the explorer pages it
 // asks for are recorded, and nothing is fetched.
 global.fetch = jest.fn(() => {
    throw new Error("tests must not perform network requests");
 });
@@ -189,37 +121,19 @@ global.document = {
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
-global.navigator.clipboard = { writeText() {} };
+global.navigator = { clipboard: { writeText() {} } };
-const {
+const { BaseWallet, Transaction, Wallet } = require("ethers");
    BaseWallet,
    JsonRpcProvider,
    Transaction,
    Wallet,
    parseEther,
 } = require("ethers");
 const { encryptWithPassword } = require("../src/shared/vault");
-const { state, loadState, saveState } = require("../src/shared/state");
+const { state, loadState } = require("../src/shared/state");
 const { onChainSwitch } = require("../src/shared/chainSwitch");
 const { NETWORKS } = require("../src/shared/networks");
 const { prices } = require("../src/shared/prices");
 const {
    goBack,
    pushCurrentView,
    setBackRenderer,
    showView,
 } = require("../src/popup/views/helpers");
 const {
    makeBackRenderer,
    resetRenderedViews,
 } = require("../src/popup/viewRouter");
 const txStatus = require("../src/popup/views/txStatus");
 const confirmTx = require("../src/popup/views/confirmTx");
 const PRIVATE_KEY = "0x" + "11".repeat(32);
 const HOLDER = new Wallet(PRIVATE_KEY).address;
 const RECIPIENT = "0xC0FfEE0000000000000000000000000000c0fFEe";
 const TOKEN = "0x7070707070707070707070707070707070707070";
 const PASSWORD = "correct horse battery staple";
 function el(id) {
@@ -236,15 +150,7 @@ beforeAll(async () => {
 beforeEach(() => {
    elements.clear();
    mockNode.asked = [];
    mockNode.balanceWei = {
        mainnet: parseEther("5"),
        sepolia: parseEther("5"),
    };
    mockNode.tokenUnits = { mainnet: 0n, sepolia: 0n };
    mockNode.broadcast = [];
    mockNode.legacyFees = false;
    global.fetch.mockClear();
    txStatus.showWait.mockClear();
    txStatus.showError.mockClear();
    signTransaction = jest.spyOn(BaseWallet.prototype, "signTransaction");
@@ -254,22 +160,16 @@ afterEach(() => {
    signTransaction.mockRestore();
 });
-// Show the confirmation screen for 1 of the native token on `networkId`, or
+// Show the confirmation screen for 1 of the native token on `networkId`, as
-// for the transfer `changes` makes of it, as Review on the Send screen does,
+// Review on the Send screen does, with its fee estimate settled.
-// with its balance read and its fee estimate settled.
+async function review(networkId) {
 async function review(networkId, changes = {}) {
    await onChainSwitch(networkId);
    await reviewOnActiveNetwork(changes);
 }
 // review() on the network already active, without switching to it again.
 async function reviewOnActiveNetwork(changes = {}) {
    state.wallets = [
        {
            type: "key",
            name: "Wallet 1",
            encryptedSecret,
-            addresses: [{ address: HOLDER }],
+            addresses: [{ address: HOLDER, balance: "5.0" }],
        },
    ];
    state.selectedWallet = 0;
@@ -281,108 +181,15 @@ async function reviewOnActiveNetwork(changes = {}) {
        ensName: null,
        amount: "1",
        token: "ETH",
        balance: "5.0",
        tokenSymbol: null,
        tokenBalance: null,
        tokenDecimals: null,
        max: false,
        ...changes,
    });
    await settle();
 }
 // The user's own node for a network, set in Settings.
 function ownNode(networkId) {
    return "https://" + networkId + ".node.example.invalid";
 }
 // After review() on `reviewedOn`: the user's own node set for it, the Settings
 // gear, `switchedTo` chosen there, the popup closed and reopened onto
 // Settings, and Back, which draws the confirmation screen again from the
 // transaction it saved. The reopened page holds an ETH price of $2,000 and a
 // USDC price of $1 whichever network is active, so each USD value shows which
 // network it was priced for.
 async function switchReopenAndGoBack(reviewedOn, switchedTo) {
    state.rpcUrl = ownNode(reviewedOn);
    pushCurrentView();
    showView("settings");
    await onChainSwitch(switchedTo);
    await loadState();
    elements.clear();
    resetRenderedViews();
    setBackRenderer(makeBackRenderer(state, { confirmTx }));
    confirmTx.init({});
    prices.ETH = 2000;
    prices.USDC = 1;
    mockNode.asked = [];
    global.fetch.mockClear();
    goBack();
    await settle();
 }
 // The USD value `text` as the screen appends it for `networkId`: nothing on a
 // testnet, which has no USD values.
 function usdOn(networkId, text) {
    return NETWORKS[networkId].isTestnet ? "" : " (" + text + ")";
 }
 // The screen for the transfer review() shows by default, described on
 // `networkId`: in its native currency, priced by it, linking to its explorer.
 function expectNativeTransferOn(networkId) {
    const { nativeCurrency: symbol, explorerUrl } = NETWORKS[networkId];
    expect(el("confirm-type").textContent).toBe(
        "Native " + symbol + " transfer",
    );
    expect(el("confirm-amount").textContent).toBe(
        "1.0000 " + symbol + usdOn(networkId, "$2,000.00"),
    );
    expect(el("confirm-balance").textContent).toBe(
        "5.0000 " + symbol + usdOn(networkId, "$10,000.00"),
    );
    expect(el("confirm-fee-amount").textContent).toBe(
        "~0.0002 " + symbol + usdOn(networkId, "$0.42"),
    );
    expect(el("confirm-fee-reserve").textContent).toBe(
        "up to 0.0004 " + symbol + " reserved",
    );
    expect(el("confirm-gas-error").textContent).toBe(
        "You do not have enough " +
            symbol +
            " to pay the network fee for this transfer. Please add " +
            symbol +
            " to this address and try again.",
    );
    expect(el("confirm-recipient-warning").textContent).toContain(
        " holds no " + symbol + ". ",
    );
    expect(el("confirm-contract-warning").textContent).toContain(
        " Sending " + symbol + " or tokens ",
    );
    expect(el("confirm-from").innerHTML).toContain(
        `href="${explorerUrl}/address/${HOLDER}"`,
    );
    expect(el("confirm-to").innerHTML).toContain(
        `href="${explorerUrl}/address/${RECIPIENT}"`,
    );
 }
 // show() reads the balance and then estimates the fee, and checks the
 // recipient, without awaiting any of them; this lets all of them finish.
 async function settle() {
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
 }
 function errors() {
    return el("confirm-errors").innerHTML;
 }
 function shown(id) {
    return el(id).style.visibility === "visible";
 }
 function sendDisabled() {
    return el("btn-confirm-send").disabled;
 }
 async function signAndSend() {
    el("confirm-tx-password").value = PASSWORD;
    await el("btn-confirm-send").handlers.get("click")();
@@ -401,25 +208,6 @@ test("a transfer reviewed on Sepolia and sent goes out on Sepolia", async () =>
    expect(txStatus.showWait).toHaveBeenCalledTimes(1);
 });
 // Saving an RPC endpoint in Settings (src/popup/views/settings.js) sets only
 // state.rpcUrl: the endpoint remembered for the active network keeps its old
 // value until the next switch away from it.
 test("a transfer reviewed after the active network's RPC endpoint was changed in Settings asks the new endpoint", async () => {
    const newNode = "https://new.node.example.invalid";
    await onChainSwitch("sepolia");
    state.rpcUrl = newNode;
    await saveState();
    await reviewOnActiveNetwork();
    expect(mockNode.asked).toEqual([
        { method: "getBalance", network: "sepolia", url: newNode },
        { method: "getCode", network: "sepolia", url: newNode },
        { method: "getTransactionCount", network: "sepolia", url: newNode },
        { method: "getFeeData", network: "sepolia", url: newNode },
    ]);
 });
 describe.each([
    ["sepolia", "mainnet", "SepoliaETH"],
    ["mainnet", "sepolia", "ETH"],
@@ -440,219 +228,11 @@ describe.each([
            expect(mockNode.broadcast).toEqual([]);
            expect(txStatus.showWait).not.toHaveBeenCalled();
            expect(txStatus.showError).not.toHaveBeenCalled();
-            expect(shown("confirm-network-changed-error")).toBe(true);
+            expect(el("confirm-errors").style.visibility).toBe("visible");
-            expect(shown("confirm-fee-bound-error")).toBe(false);
+            expect(el("confirm-errors").innerHTML).toContain(
-        });
+                "The active network changed after this transaction was" +
-    },
+                    " reviewed, so it was not sent. Please go back and review" +
-);
+                    " it again.",
 describe.each([
    ["sepolia", "mainnet"],
    ["mainnet", "sepolia"],
 ])(
    "a transfer reviewed on %s, with %s chosen in Settings, the popup reopened and Back pressed",
    (reviewedOn, switchedTo) => {
        const { nativeCurrency: symbol, explorerUrl } = NETWORKS[reviewedOn];
        test("is described on the network it was reviewed for, and neither signed nor sent", async () => {
            await review(reviewedOn);
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(state.currentView).toBe("confirm-tx");
            expectNativeTransferOn(reviewedOn);
            expect(mockNode.asked).toEqual([
                {
                    method: "getBalance",
                    network: reviewedOn,
                    url: ownNode(reviewedOn),
                },
                {
                    method: "getCode",
                    network: reviewedOn,
                    url: ownNode(reviewedOn),
                },
                {
                    method: "getTransactionCount",
                    network: reviewedOn,
                    url: ownNode(reviewedOn),
                },
                {
                    method: "getFeeData",
                    network: reviewedOn,
                    url: ownNode(reviewedOn),
                },
            ]);
            expect(global.fetch.mock.calls.map(([url]) => url)).toEqual([
                explorerUrl + "/address/" + RECIPIENT,
            ]);
            expect(el("btn-confirm-send").disabled).toBe(false);
            await signAndSend();
            expect(signTransaction).not.toHaveBeenCalled();
            expect(mockNode.broadcast).toEqual([]);
            expect(txStatus.showWait).not.toHaveBeenCalled();
            expect(txStatus.showError).not.toHaveBeenCalled();
            expect(shown("confirm-network-changed-error")).toBe(true);
        });
        test("is sent on that network, as described, once it is chosen in Settings again and Back pressed", async () => {
            await review(reviewedOn);
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            // The Settings gear, the reviewed network chosen, and Back, which
            // only unhides the screen as it was drawn.
            pushCurrentView();
            showView("settings");
            await onChainSwitch(reviewedOn);
            goBack();
            expect(state.currentView).toBe("confirm-tx");
            expectNativeTransferOn(reviewedOn);
            await signAndSend();
            const chainId = BigInt(NETWORKS[reviewedOn].chainId);
            expect(mockNode.broadcast).toHaveLength(1);
            expect(mockNode.broadcast[0].chainId).toBe(chainId);
            expect(mockNode.broadcast[0].url).toBe(ownNode(reviewedOn));
            expect(Transaction.from(mockNode.broadcast[0].signed).chainId).toBe(
                chainId,
            );
            expect(txStatus.showWait).toHaveBeenCalledTimes(1);
        });
        test("for more than the balance, says so in that network's native currency", async () => {
            await review(reviewedOn, { amount: "10" });
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(shown("confirm-balance-error")).toBe(true);
            expect(el("confirm-balance-error").textContent).toBe(
                "Your " +
                    symbol +
                    " balance does not cover this amount. Please go back and" +
                    " send a smaller amount.",
            );
        });
        test("states and checks that network's balance as it is then, which no longer covers the send", async () => {
            await review(reviewedOn);
            expect(sendDisabled()).toBe(false);
            mockNode.balanceWei = {
                [reviewedOn]: parseEther("0.5"),
                [switchedTo]: parseEther("5"),
            };
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(el("confirm-balance").textContent).toBe(
                "0.5000 " + symbol + usdOn(reviewedOn, "$1,000.00"),
            );
            expect(shown("confirm-balance-error")).toBe(true);
            expect(sendDisabled()).toBe(true);
        });
        test("states and checks that network's balance as it is then, which now covers the send, and refuses to send it", async () => {
            mockNode.balanceWei[reviewedOn] = parseEther("0.5");
            await review(reviewedOn);
            expect(sendDisabled()).toBe(true);
            mockNode.balanceWei = {
                [reviewedOn]: parseEther("5"),
                [switchedTo]: parseEther("0.5"),
            };
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(el("confirm-balance").textContent).toBe(
                "5.0000 " + symbol + usdOn(reviewedOn, "$10,000.00"),
            );
            expect(errors()).toBe("");
            expect(shown("confirm-balance-error")).toBe(false);
            expect(shown("confirm-amount-fee-error")).toBe(false);
            expect(sendDisabled()).toBe(false);
            await signAndSend();
            expect(signTransaction).not.toHaveBeenCalled();
            expect(mockNode.broadcast).toEqual([]);
            expect(shown("confirm-network-changed-error")).toBe(true);
        });
        const tokenSend = {
            token: TOKEN,
            tokenSymbol: "TOK",
            tokenDecimals: 6,
        };
        test("of a token, states and checks that network's token balance as it is then, which no longer covers the send", async () => {
            mockNode.tokenUnits[reviewedOn] = 10000000n;
            await review(reviewedOn, tokenSend);
            expect(sendDisabled()).toBe(false);
            mockNode.tokenUnits = {
                [reviewedOn]: 500000n,
                [switchedTo]: 10000000n,
            };
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(el("confirm-balance").textContent).toBe("0.5000 TOK");
            expect(shown("confirm-balance-error")).toBe(true);
            expect(el("confirm-balance-error").textContent).toBe(
                "Your TOK balance does not cover this amount. Please go back" +
                    " and send a smaller amount.",
            );
            expect(sendDisabled()).toBe(true);
        });
        test("of a token, states and checks that network's token balance as it is then, which now covers the send, and refuses to send it", async () => {
            await review(reviewedOn, tokenSend);
            expect(sendDisabled()).toBe(true);
            mockNode.tokenUnits = {
                [reviewedOn]: 10000000n,
                [switchedTo]: 0n,
            };
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(el("confirm-balance").textContent).toBe("10.0000 TOK");
            expect(errors()).toBe("");
            expect(shown("confirm-balance-error")).toBe(false);
            expect(shown("confirm-gas-error")).toBe(false);
            expect(sendDisabled()).toBe(false);
            await signAndSend();
            expect(signTransaction).not.toHaveBeenCalled();
            expect(mockNode.broadcast).toEqual([]);
            expect(shown("confirm-network-changed-error")).toBe(true);
        });
        test("with a fee quoted by a node with no type-2 pricing, shows the fee in that network's native currency and price", async () => {
            await review(reviewedOn);
            mockNode.legacyFees = true;
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(el("confirm-fee-amount").textContent).toBe(
                "0.0002 " + symbol + usdOn(reviewedOn, "$0.42"),
            );
        });
        test("of an ERC-20 token, links the token contract to that network's explorer and prices the token by that network", async () => {
            mockNode.tokenUnits[reviewedOn] = 50000000n;
            await review(reviewedOn, {
                token: TOKEN,
                tokenSymbol: "USDC",
                tokenDecimals: 6,
                amount: "10",
            });
            await switchReopenAndGoBack(reviewedOn, switchedTo);
            expect(el("confirm-type").textContent).toBe(
                "ERC-20 token transfer (USDC)",
            );
            expect(el("confirm-token-contract").innerHTML).toContain(
                `href="${explorerUrl}/address/${TOKEN}"`,
            );
            expect(el("confirm-amount").textContent).toBe(
                "10.0000 USDC" + usdOn(reviewedOn, "$10.00"),
            );
            expect(el("confirm-balance").textContent).toBe(
                "50.0000 USDC" + usdOn(reviewedOn, "$50.00"),
            );
        });
    },
@@ -677,101 +257,3 @@ test("the send is refused by a signer on another network's node", async () => {
    expect(signTransaction).not.toHaveBeenCalled();
    expect(mockNode.broadcast).toEqual([]);
 });
 describe("the balance read", () => {
    test("leaves the balance line Loading... and Sign & Send disabled until it returns", async () => {
        let answer;
        const getBalance = jest
            .spyOn(JsonRpcProvider.prototype, "getBalance")
            .mockImplementationOnce(() => new Promise((r) => (answer = r)));
        try {
            await review("sepolia");
        } finally {
            getBalance.mockRestore();
        }
        expect(el("confirm-balance").textContent).toBe("Loading...");
        expect(el("confirm-fee-amount").textContent).toBe("Estimating...");
        expect(el("confirm-errors").style.visibility).toBe("hidden");
        expect(shown("confirm-balance-error")).toBe(false);
        expect(shown("confirm-balance-read-error")).toBe(false);
        expect(sendDisabled()).toBe(true);
        answer(parseEther("5"));
        await settle();
        expect(el("confirm-balance").textContent).toBe("5.0000 SepoliaETH");
        expect(sendDisabled()).toBe(false);
    });
    // The Chrome suite measures that nothing moves; this checks the message
    // is already written, only hidden, before the read returns.
    test("that finds the amount not covered only makes a message written before it visible", async () => {
        let answer;
        const getBalance = jest
            .spyOn(JsonRpcProvider.prototype, "getBalance")
            .mockImplementationOnce(() => new Promise((r) => (answer = r)));
        try {
            await review("sepolia");
        } finally {
            getBalance.mockRestore();
        }
        const message =
            "Your SepoliaETH balance does not cover this amount. Please go" +
            " back and send a smaller amount.";
        expect(el("confirm-balance-error").textContent).toBe(message);
        expect(shown("confirm-balance-error")).toBe(false);
        answer(parseEther("0.5"));
        await settle();
        expect(el("confirm-balance-error").textContent).toBe(message);
        expect(shown("confirm-balance-error")).toBe(true);
        expect(errors()).toBe("");
        expect(sendDisabled()).toBe(true);
    });
    // The fee is estimated once the read returns, after the switch, and still
    // asks the node of the network the screen was drawn for.
    test("still in flight when Sepolia is chosen in Settings leaves the balance and the fee on mainnet", async () => {
        let answer;
        const getBalance = jest
            .spyOn(JsonRpcProvider.prototype, "getBalance")
            .mockImplementationOnce(() => new Promise((r) => (answer = r)));
        try {
            await review("mainnet");
        } finally {
            getBalance.mockRestore();
        }
        const feeAskedOn = () =>
            mockNode.asked
                .filter((q) => q.method === "getFeeData")
                .map((q) => q.network);
        expect(feeAskedOn()).toEqual([]);
        await onChainSwitch("sepolia");
        answer(parseEther("5"));
        await settle();
        expect(feeAskedOn()).toEqual(["mainnet"]);
        expect(el("confirm-balance").textContent).toBe("5.0000 ETH");
        // 21000 gas at 10 gwei expected, at 20 gwei reserved.
        expect(el("confirm-fee-amount").textContent).toBe("~0.0002 ETH");
        expect(el("confirm-fee-reserve").textContent).toBe(
            "up to 0.0004 ETH reserved",
        );
    });
    test("that fails states the balance as unknown, not zero, and blocks sending", async () => {
        const getBalance = jest
            .spyOn(JsonRpcProvider.prototype, "getBalance")
            .mockRejectedValueOnce(new Error("the node did not answer"));
        try {
            await review("sepolia");
        } finally {
            getBalance.mockRestore();
        }
        expect(el("confirm-balance").textContent).toBe("unknown (SepoliaETH)");
        expect(shown("confirm-balance-read-error")).toBe(true);
        expect(shown("confirm-balance-error")).toBe(false);
        expect(errors()).toBe("");
        expect(sendDisabled()).toBe(true);
    });
 });
@@ -192,7 +192,6 @@ describe("the wait, success and error screens", () => {
        amount: "0.0000",
        token: "ETH",
        tokenSymbol: null,
        chainId: "0x1",
    };
    const transfer = { ...creation, to: RECIPIENT };
@@ -101,7 +101,7 @@ describe("the flash line the message is shown in", () => {
    //
    // The line cuts a message too long for it with an ellipsis (see
    // showFlash() in src/popup/views/helpers.js). The assertions that
-    // measure that, in a real browser at the documented 396x600 popup, are
+    // measure that, in a real browser at the documented 360x600 popup, are
    // "a rejected dust threshold shifts no layout (#233)" and "an over-long
    // flash message keeps to one line (#252)" in tests/e2e/run.js, run by
    // make test-e2e. They are not in make check because REPO_POLICIES.md
@@ -226,9 +226,8 @@ const RPC_RESULTS = {
 // The "latest" block, which ethers' getFeeData() reads baseFeePerGas from
 // to derive maxFeePerGas. Without it every fee is a legacy gasPrice, the
 // reserve and the estimate collapse to the same number, and the gate tests
-// stop being able to distinguish them. opts.baseFeeWei replaces its base fee,
+// stop being able to distinguish them.
-// read at request time like every other fixture switch.
+function latestBlock() {
 function latestBlock(opts) {
    return {
        hash: "0x" + "11".repeat(32),
        parentHash: "0x" + "22".repeat(32),
@@ -240,26 +239,21 @@ function latestBlock(opts) {
        gasUsed: "0xf4240",
        miner: STUB_COUNTERPARTY,
        extraData: "0x",
-        baseFeePerGas: opts.baseFeeWei || hex(BASE_FEE_WEI),
+        baseFeePerGas: hex(BASE_FEE_WEI),
        transactions: [],
    };
 }
-// keccak("decimals()")[0:4], and the same for symbol(), name() and
+// keccak("decimals()")[0:4], and the same for symbol() and name().
 // balanceOf(address).
 const SELECTOR_DECIMALS = "0x313ce567";
 const SELECTOR_SYMBOL = "0x95d89b41";
 const SELECTOR_NAME = "0x06fdde03";
 const SELECTOR_BALANCE_OF = "0x70a08231";
-// Every eth_call still answers with a zero word except decimals(), symbol(),
+// Every eth_call still answers with a zero word except decimals(), symbol()
-// name() and balanceOf() on the stub token. The wallet reads decimals() back
+// and name() on the stub token. The wallet reads decimals() back at signing
-// at signing time to compare with the scale the confirmation screen rendered
+// time to compare with the scale the confirmation screen rendered (issue
-// (issue #305). Adding the token by its contract address reads the first three
+// #305). Adding the token by its contract address reads all three (issue
-// (issue #295); symbol() and name() answer what the explorer reports for it.
+// #295); symbol() and name() answer what the explorer reports for it.
 // The confirmation screen reads balanceOf()
 // (https://git.eeqj.de/sneak/AutistMask/issues/558), which answers the holding
 // the explorer reports, or zero when no holding is seeded.
 //
 // opts.tokenDecimalsOverride is the lying contract: set it and decimals()
 // answers something other than the value this same fixture reports through
@@ -284,9 +278,6 @@ function ethCallResult(req, opts) {
    if (data.startsWith(SELECTOR_NAME)) {
        return abi.encode(["string"], [tokenObject(opts).name]);
    }
    if (data.startsWith(SELECTOR_BALANCE_OF) && opts.seedTokenBalance) {
        return word(tokenBalanceItems(opts)[0].value);
    }
    return ZERO_WORD;
 }
@@ -429,10 +420,9 @@ const HOLD_MAX_MS = 30000;
 // Hold a reply open for as long as the test asks: until opts[name] is false.
 //
-// The switch (holdBalance, holdGasEstimate, holdTransactionCount or
+// The switch (holdGasEstimate, holdTransactionCount or holdBlockscout) is read
-// holdBlockscout) is read here rather than captured, so a test flips it on the
+// here rather than captured, so a test flips it on the same options object the
-// same options object the route was registered with — the same pattern as
+// route was registered with — the same pattern as seedTokenTransfer. This is
 // seedTokenTransfer. This is
 // the only way to observe a screen while its request is genuinely in flight;
 // sampling the screen and hoping to win a race against the network would
 // assert nothing on a slow machine.
@@ -482,7 +472,7 @@ function rpcReply(req, opts, report) {
        });
    }
    if (req.method === "eth_getBlockByNumber") {
-        return Object.assign(envelope, { result: latestBlock(opts) });
+        return Object.assign(envelope, { result: latestBlock() });
    }
    // The end of the dApp transaction round trip: the raw signed transaction
    // the background hands to the node. It is recorded verbatim so a test can
@@ -567,9 +557,6 @@ async function handleRpc(route, postData, opts, report) {
        report("unstubbed request: POST " + route.request().url());
        return route.abort();
    }
    if (batch.some((req) => req.method === "eth_getBalance")) {
        await awaitRelease(opts, "holdBalance", report);
    }
    if (batch.some((req) => req.method === "eth_estimateGas")) {
        await awaitRelease(opts, "holdGasEstimate", report);
    }
@@ -626,12 +613,8 @@ function traceEnabled(raw) {
 * @param {string} [opts.ethBalanceWei]  hex wei answered to eth_getBalance;
 *   defaults to zero, which is what every test that predates the funded
 *   fixture expects.
 * @param {string} [opts.baseFeeWei]  hex wei answered as the latest block's
 *   baseFeePerGas; defaults to BASE_FEE_WEI. Read at request time.
 * @param {boolean} [opts.failGasEstimate]  answer eth_estimateGas with a
 *   node-side refusal.
 * @param {boolean} [opts.holdBalance]  hold every batch containing an
 *   eth_getBalance until this is cleared again.
 * @param {boolean} [opts.holdGasEstimate]  hold every batch containing an
 *   eth_estimateGas until this is cleared again.
 * @param {boolean} [opts.holdTransactionCount]  hold every batch containing an
@@ -60,14 +60,6 @@ const TEST_TIMEOUT_MS = 120000;
 // trailing drain in main().
 const TRAILING_WATCH_MS = 1500;
 // The popup's size, as README gives it: `body` in src/popup/styles/main.css
 // is 396px wide, and src/background/index.js opens an approval window at
 // the same 396x600. Pages in this context otherwise get Playwright's
 // 1280x720 default, where the page never scrolls sideways and a button
 // below the popup's fold is still on screen, so a layout measured there
 // passes whatever the page does.
 const POPUP_VIEWPORT = { width: 396, height: 600 };
 const tests = [];
 function test(name, fn) {
@@ -367,14 +359,11 @@ async function leaveTransactionDetail(page) {
    await openAddressDetail(page);
 }
-// Back out to Home from wherever the previous test finished, and wait for the
+// Back out to Home from wherever the previous test finished.
 // save that navigation makes, so a test reading the stored stack next reads
 // the one Home left.
 async function goHome(page) {
    await leaveTransactionDetail(page);
    await page.click("#btn-address-back");
    await visible(page, "#view-main");
    await waitForPersisted(page, "currentView", "main", "back on Home");
 }
 // One field of the popup's state as it was actually persisted, read out of
@@ -1835,67 +1824,14 @@ test("the Settings assertions above all ran (#229)", async (env) => {
    );
 });
 // ------------------------------------------------ testnet banner (#511)
 // This suite runs a release build, so the red banner at the top reads
 // "[TESTNET]" on Sepolia and is absent on mainnet. A network switch in
 // Settings must change it while Settings is still on screen; it used to
 // change only when the next screen came up
 // (https://git.eeqj.de/sneak/AutistMask/issues/511).
 // The banner's text, or null when there is none, once the switch to `net`
 // has finished. The switch's flash is the last thing its handler does, and
 // showView() clears the flash, so the banner read while that flash is up is
 // the one the switch left on the screen it was made from.
 async function bannerAfterSwitch(page, net) {
    await page.waitForFunction(
        (text) => document.getElementById("flash-msg").textContent === text,
        "Switched to " + net.name + ".",
    );
    return page.evaluate(() => {
        const banner = document.getElementById("debug-banner");
        return {
            text: banner === null ? null : banner.textContent,
            onSettings: !document
                .getElementById("view-settings")
                .classList.contains("hidden"),
        };
    });
 }
 test("a network switch in Settings shows and removes the testnet banner at once (#511)", async (env) => {
    const { mainnet, sepolia } = NETWORKS;
    await openSettings(env.page);
    assert(
        (await env.page.locator("#debug-banner").count()) === 0,
        "a banner is up on mainnet before the switch",
    );
    await env.page.selectOption("#settings-network", "sepolia");
    let after = await bannerAfterSwitch(env.page, sepolia);
    assert(after.onSettings, "Settings left the screen on the switch");
    assert(
        after.text === "[TESTNET]",
        "after the switch to Sepolia, Settings shows the banner " +
            JSON.stringify(after.text) +
            ', expected "[TESTNET]"',
    );
    await env.page.selectOption("#settings-network", "mainnet");
    after = await bannerAfterSwitch(env.page, mainnet);
    assert(after.onSettings, "Settings left the screen on the switch back");
    assert(
        after.text === null,
        "after the switch back to mainnet, Settings still shows the banner " +
            JSON.stringify(after.text),
    );
    await env.page.click("#btn-settings-back");
    await visible(env.page, "#view-main");
 });
 // ------------------------------------------------ dust threshold (#233)
 // The popup size README documents the UI as designed for. Pages in this
 // context otherwise get Playwright's 1280x720 default, at which the flash
 // line has room for any plausible message and never wraps — measuring
 // there would pass for every string and prove nothing.
 const POPUP_VIEWPORT = { width: 360, height: 600 };
 // Everything below the flash line that must not move when it fills, plus
 // the height of the line itself. Runs in the page.
 //
@@ -2144,7 +2080,7 @@ test("a password error moves nothing on any screen (#297)", async (env) => {
 // ------------------------------------------ add wallet Import button (#493)
-// At 396x600 the add wallet screen's Import button already starts near the
+// At 360x600 the add wallet screen's Import button already starts near the
 // bottom of the popup, so its password error line sits beside the button
 // rather than above it. Measures the button and the line empty and again
 // filled with the longest error addWallet.js puts there. Runs in the page.
@@ -2296,8 +2232,7 @@ function feeEth(wei) {
 // What the confirmation screen is showing right now, read out of the DOM in
 // one pass: whether sending is allowed, which reason it is giving, what the
-// fee block says, how tall the whole view is, and where the password field and
+// fee block says, and how tall the whole view is.
 // Sign & Send sit in it.
 async function confirmState(page) {
    return page.evaluate(() => {
        const el = (id) => document.getElementById(id);
@@ -2310,12 +2245,6 @@ async function confirmState(page) {
        };
        return {
            height: el("view-confirm-tx").getBoundingClientRect().height,
            passwordTop:
                el("confirm-tx-password").getBoundingClientRect().top -
                el("view-confirm-tx").getBoundingClientRect().top,
            sendTop:
                el("btn-confirm-send").getBoundingClientRect().top -
                el("view-confirm-tx").getBoundingClientRect().top,
            type: el("confirm-type").textContent.trim(),
            balance: el("confirm-balance").textContent.trim(),
            fee: el("confirm-fee-amount").textContent.trim(),
@@ -2324,18 +2253,9 @@ async function confirmState(page) {
            errors: shown("confirm-errors")
                ? el("confirm-errors").textContent.trim()
                : "",
            balanceError: shown("confirm-balance-error")
                ? el("confirm-balance-error").textContent.trim()
                : "",
            amountFeeError: shown("confirm-amount-fee-error"),
            gasError: shown("confirm-gas-error"),
            feeUnknownError: shown("confirm-fee-unknown-error"),
            // Its sentence is wrapped across lines in index.html.
            feeBoundError: shown("confirm-fee-bound-error")
                ? el("confirm-fee-bound-error")
                      .textContent.replace(/\s+/g, " ")
                      .trim()
                : "",
            sendDisabled: el("btn-confirm-send").disabled,
        };
    });
@@ -2351,16 +2271,6 @@ async function waitForEstimate(page) {
    );
 }
 async function waitForBalance(page) {
    await page.waitForFunction(
        () =>
            document.getElementById("confirm-balance").textContent.trim() !==
            "Loading...",
        null,
        { timeout: 60000 },
    );
 }
 async function backToAddress(page) {
    if (await page.isVisible("#view-confirm-tx")) {
        await page.click("#btn-confirm-back");
@@ -2372,14 +2282,13 @@ async function backToAddress(page) {
    await openAddressDetail(page);
 }
-// Drive the popup to the confirmation screen for one send, and return as soon
+// Drive the popup to the confirmation screen for one send.
 // as the screen is shown, its balance read still in flight.
 //
 // It waits for the send screen to be showing `balance`, the fixture's balance
 // as that screen displays it, before filling anything in. Waiting for it —
 // rather than for a refresh to have probably landed — is what keeps every
 // assertion below deterministic after a fixture change.
-async function openConfirm(page, { token, balance, amount }) {
+async function goToConfirm(page, { token, balance, amount }) {
    await backToAddress(page);
    await page.click("#btn-send");
    await visible(page, "#view-send");
@@ -2394,14 +2303,6 @@ async function openConfirm(page, { token, balance, amount }) {
    await page.fill("#send-amount", amount);
    await page.click("#btn-send-review");
    await visible(page, "#view-confirm-tx");
 }
 // The same, returning once the screen has read the balance. It reads it
 // before it estimates the fee, so every state below is read with the balance
 // in place, the pending fee included.
 async function goToConfirm(page, send) {
    await openConfirm(page, send);
    await waitForBalance(page);
    await assertAddressesFit(page, "the confirmation screen");
 }
@@ -2477,10 +2378,7 @@ test("ConfirmTx blocks sending while the fee estimate is pending (#238)", async
        "the estimate-failed message is shown for an estimate that is merely pending",
    );
    assert(
-        !st.amountFeeError &&
+        !st.amountFeeError && !st.gasError && st.errors === "",
            !st.gasError &&
            st.errors === "" &&
            st.balanceError === "",
        "a balance message is shown before the fee is known",
    );
 });
@@ -2511,7 +2409,6 @@ test("ConfirmTx enables Send once the estimate lands, quoting both numbers (#238
    );
    assert(
        st.errors === "" &&
            st.balanceError === "" &&
            !st.amountFeeError &&
            !st.gasError &&
            !st.feeUnknownError,
@@ -2578,54 +2475,30 @@ test("ConfirmTx gates on the fee RESERVE, not the displayed estimate (#238)", as
    );
 });
-// The screen is first measured with its balance read held, so the message the
+test("ConfirmTx refuses a send that exceeds the balance outright (#238)", async (env) => {
-// read brings must already hold its space when the read returns (#558).
+    await goToConfirm(env.page, {
-test("ConfirmTx refuses a send that exceeds the balance outright, and nothing moves when the balance arrives (#238)", async (env) => {
+        token: "ETH",
-    env.routeOpts.holdBalance = true;
+        balance: FUNDED_ETH_TEXT + " ETH",
-    let reading;
+        amount: OVER_BALANCE_AMOUNT,
-    try {
+    });
        await openConfirm(env.page, {
            token: "ETH",
            balance: FUNDED_ETH_TEXT + " ETH",
            amount: OVER_BALANCE_AMOUNT,
        });
        reading = await confirmState(env.page);
    } finally {
        env.routeOpts.holdBalance = false;
    }
    assert(
        reading.balance === "Loading...",
        "the balance read was not held: " + JSON.stringify(reading.balance),
    );
    await waitForBalance(env.page);
    await waitForEstimate(env.page);
    const st = await confirmState(env.page);
    assert(
        st.balance === FUNDED_ETH_TEXT + " ETH",
        "the confirmation screen shows the wrong balance: " +
            JSON.stringify(st.balance),
    );
    const want =
-        "Your ETH balance does not cover this amount. Please go back and" +
+        "Insufficient balance. You have " +
-        " send a smaller amount.";
+        FUNDED_ETH_TEXT +
        " ETH but are trying to send " +
        OVER_BALANCE_AMOUNT +
        " ETH.";
    assert(
-        st.balanceError === want,
+        st.errors === want,
-        "wrong over-balance message: " + JSON.stringify(st.balanceError),
+        "wrong over-balance message: " + JSON.stringify(st.errors),
    );
    assert(st.sendDisabled, "Send is enabled for a send that exceeds balance");
    assert(
        !st.amountFeeError,
        "the amount-plus-fee message is shown for an amount that alone exceeds the balance",
    );
    assert(
        st.sendTop === reading.sendTop,
        "Sign & Send moved when the balance read returned: " +
            reading.sendTop +
            "px -> " +
            st.sendTop +
            "px",
    );
 });
 test("ConfirmTx refuses to send when the fee estimate fails, with its own message (#238)", async (env) => {
@@ -2669,10 +2542,7 @@ test("ConfirmTx refuses to send when the fee estimate fails, with its own messag
            "the estimate-failed message is not shown after a failed estimate",
        );
        assert(
-            !st.amountFeeError &&
+            !st.amountFeeError && !st.gasError && st.errors === "",
                !st.gasError &&
                st.errors === "" &&
                st.balanceError === "",
            "a balance message is shown for an estimate that simply failed",
        );
        assert(
@@ -2763,19 +2633,21 @@ test("ConfirmTx refuses an ERC-20 send that exceeds the token balance (#238)", a
    await waitForEstimate(env.page);
    const st = await confirmState(env.page);
    assert(
        st.balance === TOKEN_BALANCE_TEXT + " " + STUB_TOKEN.symbol,
        "the confirmation screen shows the wrong token balance: " +
            JSON.stringify(st.balance),
    );
    const want =
-        "Your " +
+        "Insufficient " +
        STUB_TOKEN.symbol +
-        " balance does not cover this amount. Please go back and send a" +
+        " balance. You have " +
-        " smaller amount.";
+        TOKEN_BALANCE_TEXT +
        " " +
        STUB_TOKEN.symbol +
        " but are trying to send " +
        OVER_TOKEN_AMOUNT +
        " " +
        STUB_TOKEN.symbol +
        ".";
    assert(
-        st.balanceError === want,
+        st.errors === want,
-        "wrong over-token-balance message: " + JSON.stringify(st.balanceError),
+        "wrong over-token-balance message: " + JSON.stringify(st.errors),
    );
    assert(
        st.sendDisabled,
@@ -2831,9 +2703,9 @@ test("ConfirmTx gates the ERC-20 fee on the RESERVE, with the ERC-20 message (#2
        "the native-ETH over-budget message is shown on an ERC-20 transfer",
    );
    assert(
-        st.errors === "" && st.balanceError === "",
+        st.errors === "",
        "a token-balance message is shown for a transfer the token balance covers: " +
-            JSON.stringify(st.errors + st.balanceError),
+            JSON.stringify(st.errors),
    );
    assert(
        st.height === env.erc20PendingHeight,
@@ -2979,10 +2851,9 @@ async function goToTokenConfirm(env) {
        amount: TOKEN_AMOUNT,
    });
    await waitForEstimate(env.page);
    // TOKEN_AMOUNT to four decimal places (README.md, Display Consistency).
    const shown = await shownAmount(env.page);
    assert(
-        shown === "0.2500 " + STUB_TOKEN.symbol,
+        shown === TOKEN_AMOUNT + " " + STUB_TOKEN.symbol,
        "the confirmation screen is not showing the amount that was entered: " +
            JSON.stringify(shown),
    );
@@ -3132,210 +3003,6 @@ test("a token that lies about decimals() at signing time broadcasts nothing (#30
    }
 });
 // ------------------------- a send Sign & Send refuses moves nothing (#583)
 //
 // README, No Layout Shift. Sign & Send refuses a send on the confirmation
 // screen when the active network changed since review and when its gas limit
 // or fee is over its bound, and each refusal's sentence sits in a box that held
 // its space from the first paint. This drives the total fee refusal, the longer
 // of the two sentences.
 // The base fee the stub node quotes once Sign & Send is pressed. ethers asks
 // twice it plus the 1 gwei priority fee per gas, 50,001 gwei, so the 21,000-gas
 // send would allow a fee of about 1.05 ETH, over the 1 ETH this wallet signs
 // for (MAX_TOTAL_FEE in src/shared/approvalVerify.js).
 const OVER_BOUND_BASE_FEE_WEI = 25000n * 10n ** 9n;
 test("a send refused for its fee leaves the password field and Sign & Send where they were (#583)", async (env) => {
    env.errors.expect("confirmTx logging the refused send", /send refused/);
    try {
        await goToConfirm(env.page, {
            token: "ETH",
            balance: FUNDED_ETH_TEXT + " ETH",
            amount: COMFORTABLE_AMOUNT,
        });
        await waitForEstimate(env.page);
        const before = await confirmState(env.page);
        assert(
            !before.sendDisabled && before.feeBoundError === "",
            "the screen is not ready to send: " + JSON.stringify(before),
        );
        // Only now, with the screen drawn and its fee estimated, does the
        // node quote a fee over the bound.
        env.routeOpts.baseFeeWei = toHexWei(OVER_BOUND_BASE_FEE_WEI);
        const sent = env.routeOpts.broadcastTransactions.length;
        await fillPasswordAndSend(env.page);
        await env.page.waitForFunction(
            () =>
                getComputedStyle(
                    document.getElementById("confirm-fee-bound-error"),
                ).visibility === "visible",
            null,
            { timeout: 60000 },
        );
        const after = await confirmState(env.page);
        // Printed pass or fail, as the dust threshold test does.
        console.log(
            "# refused send: password field top " +
                before.passwordTop +
                " -> " +
                after.passwordTop +
                "px, Sign & Send top " +
                before.sendTop +
                " -> " +
                after.sendTop +
                "px",
        );
        assert(
            env.routeOpts.broadcastTransactions.length === sent,
            "a send over the fee bound reached the RPC",
        );
        assert(
            after.feeBoundError ===
                "The gas limit or fee the RPC endpoint quoted for this" +
                    " transaction is more than this wallet will sign for, so" +
                    " it was not sent. Please go back and try again.",
            "wrong fee refusal: " + JSON.stringify(after.feeBoundError),
        );
        assert(
            after.passwordTop === before.passwordTop,
            "the password field moved " +
                (after.passwordTop - before.passwordTop) +
                "px when the send was refused",
        );
        assert(
            after.sendTop === before.sendTop,
            "Sign & Send moved " +
                (after.sendTop - before.sendTop) +
                "px when the send was refused",
        );
    } finally {
        env.routeOpts.baseFeeWei = undefined;
        await backToAddress(env.page);
    }
 });
 // --------- a send from an address the selected wallet does not hold (#609)
 //
 // The selection is saved apart from the confirmation screen, so the popup can
 // reopen onto the screen with a wallet selected that does not hold its From
 // address, and Sign & Send then refuses the send. Another popup selecting the
 // key wallet would save that selection; here it is written into storage, and
 // the popup reopened.
 test("a send from an address the selected wallet does not hold leaves the password field and Sign & Send where they were (#609)", async (env) => {
    try {
        // From the HD wallet's address.
        await goToConfirm(env.page, {
            token: "ETH",
            balance: FUNDED_ETH_TEXT + " ETH",
            amount: COMFORTABLE_AMOUNT,
        });
        // The screen's own save lands first, so it cannot write over the
        // selection below.
        await waitForPersisted(
            env.page,
            "currentView",
            "confirm-tx",
            "before selecting the key wallet",
        );
        await env.page.evaluate(
            () =>
                new Promise((resolve) => {
                    chrome.storage.local.get("autistmask", (r) => {
                        const record = {
                            ...r.autistmask,
                            selectedWallet: 1,
                            selectedAddress: 0,
                        };
                        chrome.storage.local.set(
                            { autistmask: record },
                            resolve,
                        );
                    });
                }),
        );
        await reopenPopup(env, "confirm-tx");
        await waitForEstimate(env.page);
        // The refusal shown anywhere on the screen, not only in its own box:
        // shown on the password error line instead, the test fails on the
        // moves checked below rather than on the wait for it.
        const refusal = env.page
            .locator("#view-confirm-tx")
            .getByText("does not hold the From address above")
            .filter({ visible: true });
        const before = await confirmState(env.page);
        assert(
            !before.sendDisabled && (await refusal.count()) === 0,
            "the screen is not ready to send: " + JSON.stringify(before),
        );
        const sent = env.routeOpts.broadcastTransactions.length;
        await fillPasswordAndSend(env.page);
        await refusal.waitFor({ timeout: 60000 });
        const after = await confirmState(env.page);
        // Printed pass or fail, as the dust threshold test does.
        console.log(
            "# refused From address: password field top " +
                before.passwordTop +
                " -> " +
                after.passwordTop +
                "px, Sign & Send top " +
                before.sendTop +
                " -> " +
                after.sendTop +
                "px",
        );
        assert(
            env.routeOpts.broadcastTransactions.length === sent,
            "a send from an address the selected wallet does not hold" +
                " reached the RPC",
        );
        assert(
            after.passwordTop === before.passwordTop,
            "the password field moved " +
                (after.passwordTop - before.passwordTop) +
                "px when the send was refused",
        );
        assert(
            after.sendTop === before.sendTop,
            "Sign & Send moved " +
                (after.sendTop - before.sendTop) +
                "px when the send was refused",
        );
        // Only now, where the refusal is shown. Its sentence is wrapped across
        // lines in index.html.
        const shownIn = await refusal.evaluate((el) => ({
            id: el.id,
            text: el.textContent.replace(/\s+/g, " ").trim(),
        }));
        assert(
            shownIn.id === "confirm-from-address-error" &&
                shownIn.text ===
                    "The selected wallet does not hold the From address above," +
                        " so nothing was sent. Please go back and send again.",
            "wrong From address refusal: " + JSON.stringify(shownIn),
        );
    } finally {
        // A reopened popup restores no Send screen beneath this one, so Back
        // lands on the selected address. Then Home, and the HD wallet's
        // address, which the later tests send from.
        if (await env.page.isVisible("#view-confirm-tx")) {
            await env.page.click("#btn-confirm-back");
        }
        if (await env.page.isVisible("#view-send")) {
            await env.page.click("#btn-send-back");
        }
        await visible(env.page, "#view-address");
        await env.page.click("#btn-address-back");
        await visible(env.page, "#view-main");
        await openAddressDetail(env.page);
    }
 });
 // ------------------------------ the wait for a receipt ending in error (#315)
 //
 // README.md (WaitTx) documents two ways the wait ends on the error screen: a
@@ -3436,14 +3103,10 @@ test("six failed receipt lookups in a row end on the unreachable-network message
 // timeout ("<iframe id=\"pwn\"> intercepts pointer events") rather than as
 // anything that names the defect.
-// The issue's reproduction, with the frame sized to the popup.
+// Verbatim from the issue's reproduction.
 const HOSTILE_SYMBOL =
    '<iframe id="pwn" src="https://dapp.e2e.test/" ' +
-    'style="position:fixed;left:0;top:0;width:' +
+    'style="position:fixed;left:0;top:0;width:360px;height:600px;z-index:99999"></iframe>';
    POPUP_VIEWPORT.width +
    "px;height:" +
    POPUP_VIEWPORT.height +
    'px;z-index:99999"></iframe>';
 // What a correctly escaped and capped render of it reads as: the first
 // MAX_SYMBOL_LENGTH-1 characters and an ellipsis. Spelled out rather than
@@ -5035,20 +4698,8 @@ function addressRowReport(page) {
    });
 }
 // Measured at the popup's 396x600 (POPUP_VIEWPORT). Every page in this
 // context, approval windows included, is otherwise 1280x720 whatever size
 // the extension asks for, and a page that wide never scrolls sideways. The
 // page is then put back to the size it had, so the size a later step runs at
 // does not depend on whether this one ran.
 async function assertAddressesFit(page, where) {
-    const sizeBefore = page.viewportSize();
+    const report = await addressRowReport(page);
    await page.setViewportSize(POPUP_VIEWPORT);
    let report;
    try {
        report = await addressRowReport(page);
    } finally {
        await page.setViewportSize(sizeBefore);
    }
    assert(
        report.rows.length > 0,
        where + ": no address rows were rendered, so nothing was measured",
@@ -5208,9 +4859,6 @@ async function main() {
        seedTokenBalance: false,
        ethBalanceWei: null,
        failGasEstimate: false,
        // Whether a JSON-RPC batch asking for a balance is held unanswered:
        // the confirmation screen's own balance read (#558).
        holdBalance: false,
        holdGasEstimate: false,
        // Whether a JSON-RPC batch asking for a transaction count is held
        // unanswered: the address scan after creating a wallet (#475).
@@ -80,7 +80,6 @@ describe.each([
        jest.doMock("../src/shared/state", () => ({
            state: { trackedTokens: [] },
            saveState,
            currentNetwork: () => ({ chainId: 1 }),
        }));
        jest.doMock("../src/popup/views/helpers", () => ({
            $: element,
@@ -17,10 +17,6 @@ jest.mock("ethers", () => {
        async lookupAddress() {
            return null;
        }
        // The 1.5 of the native token the address holds on either network.
        async getBalance() {
            return 1500000000000000000n;
        }
        // 10 gwei expected, 20 gwei reserved per gas.
        async getFeeData() {
            return { maxFeePerGas: 20000000000n, gasPrice: 10000000000n };
@@ -151,7 +147,7 @@ global.document = {
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
-global.navigator.clipboard = { writeText() {} };
+global.navigator = { clipboard: { writeText() {} } };
 const { state } = require("../src/shared/state");
 const { NETWORKS } = require("../src/shared/networks");
@@ -245,7 +241,7 @@ describe.each([
    test("the value", async () => {
        await confirmSend("0.1");
        expect(text("confirm-type")).toBe("Native " + symbol + " transfer");
-        expect(text("confirm-amount")).toBe("0.1000 " + symbol);
+        expect(text("confirm-amount")).toBe("0.1 " + symbol);
        await approveTx(NETWORKS[networkId].chainId);
        expect(text("approve-tx-value")).toBe("0.0100 " + symbol);
    });
@@ -343,11 +339,14 @@ describe.each([
    test("the insufficient-balance error", async () => {
        await confirmSend("2");
-        expect(text("confirm-balance-error")).toBe(
+        expect(
-            "Your " +
+            global.document.getElementById("confirm-errors").innerHTML,
        ).toContain(
            "You have 1.5000 " +
                symbol +
-                " balance does not cover this amount. Please go back and send" +
+                " but are trying to send 2 " +
-                " a smaller amount.",
+                symbol +
                ".",
        );
    });
 });
@@ -429,10 +428,10 @@ describe.each([
            await global.document
                .getElementById("btn-confirm-send")
                .handlers.get("click")();
-            expect(text("wait-tx-summary")).toBe("0.1000 " + symbol);
+            expect(text("wait-tx-summary")).toBe("0.1 " + symbol);
            state.networkId = activeNetworkId;
            txStatus.restoreWait();
-            expect(text("wait-tx-summary")).toBe("0.1000 " + symbol);
+            expect(text("wait-tx-summary")).toBe("0.1 " + symbol);
        });
        test("the transaction detail screen's type line and fee", async () => {
@@ -364,7 +364,7 @@ describe("a save that fails", () => {
        return storage;
    }
-    test("is reported when the caller does not await it", async () => {
+    test("is reported, not swallowed by the save queue", async () => {
        const storage = failingStorage(unversionedValidProfile());
        const { state, loadState, saveState, onSaveFailure } =
            loadStateModule(storage);
@@ -97,7 +97,6 @@ const {
    normalizePersisted,
 } = require("../src/shared/persistedState");
 const { stateProblem } = require("../src/shared/stateSchema");
 const { isKnownNetworkId } = require("../src/shared/networks");
 const { RESTORABLE_VIEWS } = require("../src/shared/restorableViews");
 const {
    bootPopup,
@@ -194,29 +193,6 @@ const CONTRACT = [
        floorOnly: [[1, 2], [null], [{}], [[TOKEN_ADDRESS]]],
        holds: (v) => everyEntry(v, (t) => isRecord(t) && isText(t.address)),
    },
    {
        field: "networkTrackedTokens",
        kind: KIND.ENTRIES,
        hostile: [42, "notarecord", { sepolia: "notalist" }],
        floorOnly: [
            [1, 2],
            { sepolia: [1, 2] },
            { mainnet: [null, {}, [TOKEN_ADDRESS]] },
            { notanetwork: [{ address: TOKEN_ADDRESS }] },
            JSON.parse('{"__proto__":[{"address":"0xabc"}]}'),
        ],
        // Each list is put straight back onto trackedTokens by
        // applyChainSwitchFields() when its network becomes the active one, so
        // it is floored the same way; a key that names no network is dropped.
        holds: (v) =>
            isRecord(v) &&
            Object.getPrototypeOf(v) === Object.prototype &&
            Object.keys(v).every(
                (id) =>
                    isKnownNetworkId(id) &&
                    everyEntry(v[id], (t) => isRecord(t) && isText(t.address)),
            ),
    },
    {
        field: "allowedSites",
        kind: KIND.ENTRIES,
@@ -441,17 +417,6 @@ const CONTRACT = [
                views: ["error-tx"],
                restored: false,
            },
            // A chain id naming no network has no explorer to link to.
            {
                value: { hash: "0x1", to: ADDRESS, chainId: "0x5" },
                views: ["success-tx"],
                restored: false,
            },
            {
                value: { message: "boom", to: ADDRESS, chainId: "0x5" },
                views: ["error-tx"],
                restored: false,
            },
            // transaction passes on `data.tx`.
            {
                value: { tx: { hash: "0x1" } },
@@ -465,26 +430,6 @@ const CONTRACT = [
                        from: ADDRESS,
                        to: ADDRESS,
                        contractAddress: 42,
                        chainId: "0x1",
                    },
                },
                views: ["transaction"],
                restored: false,
            },
            // A transaction whose chain id is missing or names no network has
            // no explorer to link to and no Blockscout to be read from.
            {
                value: { tx: { hash: "0x1", from: ADDRESS, to: ADDRESS } },
                views: ["transaction"],
                restored: false,
            },
            {
                value: {
                    tx: {
                        hash: "0x1",
                        from: ADDRESS,
                        to: ADDRESS,
                        chainId: "0x5",
                    },
                },
                views: ["transaction"],
@@ -508,33 +453,6 @@ const CONTRACT = [
                views: ["confirm-tx"],
                restored: false,
            },
            // The amount line splits the amount to cut it to four decimals.
            {
                value: {
                    pendingTx: {
                        token: "ETH",
                        from: ADDRESS,
                        to: ADDRESS,
                        amount: 42,
                    },
                },
                views: ["confirm-tx"],
                restored: false,
            },
            // A chain id naming no network has no explorer to link to.
            {
                value: {
                    pendingTx: {
                        token: "ETH",
                        from: ADDRESS,
                        to: ADDRESS,
                        amount: "1",
                        chainId: "0x5",
                    },
                },
                views: ["confirm-tx"],
                restored: false,
            },
            // wait-tx passes on `pendingWait.hash`; restoreWait() has checked
            // the fields below it since it was written, and this is the
            // regression guard.
@@ -843,22 +761,17 @@ const WELL_FORMED_DATA = {
    message: "boom",
    to: ADDRESS,
    decoded: { details: [{ address: TOKEN_ADDRESS }] },
-    tx: {
+    tx: { hash: "0x1", from: ADDRESS, to: ADDRESS, contractAddress: null },
        hash: "0x1",
        from: ADDRESS,
        to: ADDRESS,
        contractAddress: null,
        chainId: "0x1",
    },
    pendingTx: {
        token: "ETH",
        from: ADDRESS,
        to: ADDRESS,
        amount: "1",
        balance: "2",
    },
    pendingWait: {
        hash: "0x1",
-        txInfo: { to: ADDRESS, amount: "1", chainId: "0x1" },
+        txInfo: { to: ADDRESS, amount: "1" },
        broadcastTime: BROADCAST_TIME,
    },
 };
@@ -9,7 +9,6 @@ const {
    bootPopup,
    cleanupPopup,
    unversionedValidProfile,
    ADDRESS,
 } = require("./support/popupBoot");
 const FLASH_MS = 10;
@@ -41,47 +40,3 @@ test("a flash message's timer does not fire after cleanupPopup()", async () => {
    await wait(FLASH_MS * 5);
 });
 // A boot onto a screen that sends a request no mocked module answers: that
 // request reaches the boot's fetch() stub, never the internet
 // (https://git.eeqj.de/sneak/AutistMask/issues/559).
 function restoringOnto(view, viewData) {
    return unversionedValidProfile({
        currentView: view,
        selectedWallet: 0,
        selectedAddress: 0,
        viewStack: ["main"],
        viewData,
    });
 }
 test("the transaction screen's Blockscout request reaches the stub", async () => {
    const page = await bootPopup(
        restoringOnto("transaction", {
            tx: { hash: "0x1", from: ADDRESS, to: ADDRESS, chainId: "0x1" },
        }),
    );
    expect(page.visibleViews()).toEqual(["transaction"]);
    expect(globalThis.fetch.mock.calls.map((call) => call[0])).toEqual([
        "https://eth.blockscout.com/api/v2/transactions/0x1",
    ]);
 });
 test("the confirmation screen's Etherscan lookup reaches the stub", async () => {
    const page = await bootPopup(
        restoringOnto("confirm-tx", {
            pendingTx: {
                token: "ETH",
                from: ADDRESS,
                to: ADDRESS,
                amount: "1",
            },
        }),
    );
    expect(page.visibleViews()).toEqual(["confirm-tx"]);
    expect(globalThis.fetch.mock.calls.map((call) => call[0])).toEqual([
        "https://etherscan.io/address/" + ADDRESS,
    ]);
 });
@@ -23,10 +23,7 @@ jest.mock("../src/shared/log", () => ({
    isDebug: () => false,
 }));
-const { AbiCoder } = require("ethers");
+// What the confirmation screen asks the node for.
 // What the confirmation screen asks the node for. The address holds the 1 ETH
 // and 250 TOK the wallet below records.
 const mockProvider = {
    getFeeData: async () => ({
        maxFeePerGas: 2000000000n,
@@ -35,11 +32,7 @@ const mockProvider = {
    estimateGas: async () => 21000n,
    getCode: async () => "0x",
    getTransactionCount: async () => 1,
-    getBalance: async () => 1000000000000000000n,
+    getBalance: async () => 0n,
    // The one contract call the screen makes, balanceOf(), answered at the
    // token's 6 decimal places.
    call: async () =>
        AbiCoder.defaultAbiCoder().encode(["uint256"], [250000000n]),
 };
 jest.mock("../src/shared/balances", () => {
@@ -97,7 +90,7 @@ global.document = {
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
-global.navigator.clipboard = { writeText() {} };
+global.navigator = { clipboard: { writeText() {} } };
 const { state } = require("../src/shared/state");
 const send = require("../src/popup/views/send");
@@ -18,7 +18,6 @@
 // What the stub node answers. Each test sets what it needs.
 const mockNode = {
    balanceWei: 0n,
    tokenUnits: 0n,
    feeData: { maxFeePerGas: 1n, gasPrice: 1n },
 };
@@ -31,13 +30,6 @@ jest.mock("ethers", () => {
        async getBalance() {
            return mockNode.balanceWei;
        }
        // balanceOf(), the one contract call these screens make.
        async call() {
            return actual.AbiCoder.defaultAbiCoder().encode(
                ["uint256"],
                [mockNode.tokenUnits],
            );
        }
        async lookupAddress() {
            return null;
        }
@@ -151,7 +143,7 @@ global.document = {
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
-global.navigator.clipboard = { writeText() {} };
+global.navigator = { clipboard: { writeText() {} } };
 const { refreshBalances } = require("../src/shared/balances");
 const { state } = require("../src/shared/state");
@@ -203,19 +195,10 @@ function errors() {
    return global.document.getElementById("confirm-errors").innerHTML;
 }
 // The message for an amount the balance does not cover, while it is shown.
 function balanceError() {
    const box = global.document.getElementById("confirm-balance-error");
    return box.style.visibility === "visible" ? box.textContent : "";
 }
 // The ETH balance the node reports and the token rows the explorer reports,
-// fetched and stored exactly where the popup stores them. The node reports the
+// fetched and stored exactly where the popup stores them.
 // token holding the explorer does.
 async function refreshWith(balanceWei, tokenItems = []) {
    mockNode.balanceWei = balanceWei;
    mockNode.tokenUnits =
        tokenItems.length > 0 ? BigInt(tokenItems[0].value) : 0n;
    mockExplorer.items = tokenItems;
    state.wallets = [{ name: "Wallet 1", addresses: [{ address: HOLDER }] }];
    state.selectedWallet = 0;
@@ -317,10 +300,9 @@ describe("a tracked token holding below 0.000001 never renders as zero", () => {
        await confirmSend("0.0000005", TOKEN);
        expect(text("confirm-balance")).toBe("0.0000005 TOK");
        expect(errors()).toBe("");
        expect(balanceError()).toBe("");
        await confirmSend("0.0000006", TOKEN);
-        expect(balanceError()).toContain(
+        expect(errors()).toContain(
-            "Your TOK balance does not cover this amount.",
+            "You have 0.0000005 TOK but are trying to send 0.0000006 TOK.",
        );
    });
@@ -334,7 +316,6 @@ describe("a tracked token holding below 0.000001 never renders as zero", () => {
        await confirmSend("1.5", TOKEN);
        expect(text("confirm-balance")).toBe("1.5000 TOK");
        expect(errors()).toBe("");
        expect(balanceError()).toBe("");
    });
    test("with more than 18 decimals and a holding below 10^-18", async () => {
@@ -348,8 +329,9 @@ describe("a tracked token holding below 0.000001 never renders as zero", () => {
        );
        await confirmSend("0.000000000000000001", TOKEN);
        expect(text("confirm-balance")).toBe("0.000000000000000000000001 TOK");
-        expect(balanceError()).toContain(
+        expect(errors()).toContain(
-            "Your TOK balance does not cover this amount.",
+            "You have 0.000000000000000000000001 TOK but are trying to send" +
                " 0.000000000000000001 TOK.",
        );
    });
 });
@@ -374,10 +356,9 @@ describe("an untracked token holding below 0.000001 never renders as zero", () =
        await confirmSend("0.0000005", TOKEN);
        expect(text("confirm-balance")).toBe("0.0000005 TOK");
        expect(errors()).toBe("");
        expect(balanceError()).toBe("");
        await confirmSend("0.0000006", TOKEN);
-        expect(balanceError()).toContain(
+        expect(errors()).toContain(
-            "Your TOK balance does not cover this amount.",
+            "You have 0.0000005 TOK but are trying to send 0.0000006 TOK.",
        );
    });
 });
@@ -17,7 +17,6 @@
 // What the stub node answers, and the signed transactions it was handed.
 const mockNode = {
    balanceWei: 0n,
    tokenUnits: 0n,
    feeData: null,
    broadcast: [],
 };
@@ -31,14 +30,6 @@ jest.mock("ethers", () => {
        async getBalance() {
            return mockNode.balanceWei;
        }
        // balanceOf(), the one contract call these screens make before Sign
        // & Send.
        async call() {
            return actual.AbiCoder.defaultAbiCoder().encode(
                ["uint256"],
                [mockNode.tokenUnits],
            );
        }
        async lookupAddress() {
            return null;
        }
@@ -146,7 +137,7 @@ global.document = {
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
-global.navigator.clipboard = { writeText() {} };
+global.navigator = { clipboard: { writeText() {} } };
 const { Transaction, Wallet, formatEther } = require("ethers");
 const { refreshBalances } = require("../src/shared/balances");
@@ -196,12 +187,9 @@ function text(id) {
 }
 // The ETH balance the node reports and the token rows the explorer reports,
-// fetched and stored exactly where the popup stores them. The node reports the
+// fetched and stored exactly where the popup stores them.
 // token holding the explorer does.
 async function refreshWith(balanceWei, tokenItems = []) {
    mockNode.balanceWei = balanceWei;
    mockNode.tokenUnits =
        tokenItems.length > 0 ? BigInt(tokenItems[0].value) : 0n;
    mockExplorer.items = tokenItems;
    state.wallets = [
        {
@@ -306,8 +294,7 @@ describe("Max on an ETH send", () => {
        openSend();
        await pressMax();
        await review();
-        expect(confirmed.amount).toBe(maxAfter(20n * GWEI));
+        expect(text("confirm-amount")).toBe(maxAfter(20n * GWEI) + " ETH");
        expect(text("confirm-amount")).toBe("1.2341 ETH");
        expect(el("confirm-errors").innerHTML).toBe("");
        expect(el("confirm-amount-fee-error").style.visibility).toBe("hidden");
        expect(canSend()).toBe(true);
@@ -323,16 +310,14 @@ describe("Max on an ETH send", () => {
        // Kept, the Send screen's amount would be refused for want of funds.
        mockNode.feeData = fees(30n * GWEI);
        await review();
-        expect(confirmed.amount).toBe(maxAfter(30n * GWEI));
+        expect(text("confirm-amount")).toBe(maxAfter(30n * GWEI) + " ETH");
        expect(text("confirm-amount")).toBe("1.2339 ETH");
        expect(canSend()).toBe(true);
        // And falls when the screen is shown again, as on reopening the popup.
        mockNode.feeData = fees(10n * GWEI);
        confirmTx.restore();
        await settle();
-        expect(confirmed.amount).toBe(maxAfter(10n * GWEI));
+        expect(text("confirm-amount")).toBe(maxAfter(10n * GWEI) + " ETH");
        expect(text("confirm-amount")).toBe("1.2343 ETH");
        expect(canSend()).toBe(true);
    });
@@ -529,8 +514,7 @@ describe("Max on an ETH send", () => {
        el("send-amount").handlers.get("input")();
        mockNode.feeData = fees(30n * GWEI);
        await review();
-        expect(confirmed.amount).toBe("0.5");
+        expect(text("confirm-amount")).toBe("0.5 ETH");
        expect(text("confirm-amount")).toBe("0.5000 ETH");
    });
 });
@@ -544,8 +528,7 @@ describe("Max on a token send", () => {
        await pressMax();
        expect(el("send-amount").value).toBe("1234.567890123456789012");
        await review();
-        expect(confirmed.amount).toBe("1234.567890123456789012");
+        expect(text("confirm-amount")).toBe("1234.567890123456789012 TOK");
        expect(text("confirm-amount")).toBe("1234.5678 TOK");
        expect(canSend()).toBe(true);
    });
@@ -558,8 +541,7 @@ describe("Max on a token send", () => {
        await pressMax();
        expect(el("send-amount").value).toBe("1234.567890123456789012");
        await review();
-        expect(confirmed.amount).toBe("1234.567890123456789012");
+        expect(text("confirm-amount")).toBe("1234.567890123456789012 TOK");
        expect(text("confirm-amount")).toBe("1234.5678 TOK");
        expect(canSend()).toBe(true);
    });
@@ -160,7 +160,7 @@ describe("the approval-window reproduction", () => {
        await approvalWindow.state.loadState();
        approvalWindow.helpers.showView("approve-tx");
        // showView() does not await its own saveState(); an extra save
-        // waits for the lock behind that one and so resolves only after it,
+        // joins the same queue and only resolves once that one has too,
        // which is the black-box way to know it landed.
        await approvalWindow.state.saveState();
@@ -225,12 +225,7 @@ describe("a popup already open when the stored profile becomes unreadable", () =
                viewData: {
                    pendingWait: {
                        hash: "0x1",
-                        txInfo: {
+                        txInfo: { to: ADDRESS, amount: "1", token: "ETH" },
                            to: ADDRESS,
                            amount: "1",
                            token: "ETH",
                            chainId: "0x1",
                        },
                        broadcastTime: Date.now(),
                    },
                },
@@ -1,96 +0,0 @@
 // A popup save reads the stored record, merges this page's changes into it
 // and writes it back. The background's write of a network the user approved
 // used to be able to land between that read and that write, and the popup's
 // write then put the old network back
 // (https://git.eeqj.de/sneak/AutistMask/issues/641). Every write of the record
 // now holds a lock from its read to its write.
 //
 // The popup and the background run here as the real modules over one shared
 // storage stub, and share the lock the way the background and a page outside
 // a Firefox private window share the browser's
 // (tests/support/navigatorLocks.js).
 const { makeStorageStub } = require("./support/storageStub");
 function loadContexts(storage) {
    jest.resetModules();
    globalThis.chrome = { storage: { local: storage.local } };
    return {
        popup: require("../src/shared/state"),
        background: require("../src/background/state"),
        applyChainSwitchFields: require("../src/shared/chainSwitchFields")
            .applyChainSwitchFields,
    };
 }
 // Lets every pending promise callback run, and then some.
 function nextMacrotask() {
    return new Promise((resolve) => setImmediate(resolve));
 }
 afterEach(() => {
    delete globalThis.chrome;
    jest.restoreAllMocks();
 });
 test("a network the background switches to during a popup save stays stored", async () => {
    const storage = makeStorageStub({ autistmask: { networkId: "sepolia" } });
    const { popup, background, applyChainSwitchFields } = loadContexts(storage);
    await popup.loadState();
    // The popup navigates, so its save has a change of its own to write.
    popup.state.currentView = "settings";
    // The popup's save has read the record and is about to write it back when
    // the user's approval of a site's switch to mainnet reaches the
    // background. Without the lock the background's whole update runs before
    // the next macrotask; with it, the update waits for the popup's write.
    let backgroundSwitch;
    const realSet = storage.local.set.getMockImplementation();
    storage.local.set.mockImplementationOnce(async (items) => {
        backgroundSwitch = background.updateState((fresh) =>
            applyChainSwitchFields(fresh, "mainnet"),
        );
        await nextMacrotask();
        return realSet(items);
    });
    await popup.saveState();
    await backgroundSwitch;
    const stored = storage.read("autistmask");
    expect(stored.networkId).toBe("mainnet");
    expect(stored.currentView).toBe("settings");
 });
 test("after a save that failed, the next save still keeps a network the background switches to during it", async () => {
    jest.spyOn(console, "error").mockImplementation(() => {});
    const storage = makeStorageStub({ autistmask: { networkId: "sepolia" } });
    const { popup, background, applyChainSwitchFields } = loadContexts(storage);
    await popup.loadState();
    popup.state.currentView = "settings";
    // The first save's write is refused, so it gives the lock back having
    // failed.
    storage.local.set.mockRejectedValueOnce(new Error("quota exceeded"));
    await expect(popup.saveState()).rejects.toThrow("quota exceeded");
    // The next save is between its read and its write when the background
    // switches to mainnet, as in the test above.
    let backgroundSwitch;
    const realSet = storage.local.set.getMockImplementation();
    storage.local.set.mockImplementationOnce(async (items) => {
        backgroundSwitch = background.updateState((fresh) =>
            applyChainSwitchFields(fresh, "mainnet"),
        );
        await nextMacrotask();
        return realSet(items);
    });
    await popup.saveState();
    await backgroundSwitch;
    const stored = storage.read("autistmask");
    expect(stored.networkId).toBe("mainnet");
    expect(stored.currentView).toBe("settings");
 });
@@ -1,27 +0,0 @@
 // `navigator.locks` for the unit tests, which run on node, where there is none.
 //
 // One lock per name: granted in the order it was asked for, and let go when
 // the callback settles, whether it resolved or rejected. That is what the
 // browser's own does for the one call the extension makes,
 // `navigator.locks.request(name, callback)`. Every module a test file loads
 // shares it, as the extension's background and its pages share the browser's,
 // except a page in a Firefox private window (README, "Stored state and its
 // version").
 //
 // Run before each test file by `setupFiles` in package.json.
 // For each name, a promise that settles once the last request for it has
 // let the lock go.
 const released = new Map();
 function request(name, callback) {
    const previous = released.get(name) || Promise.resolve();
    const result = previous.then(() => callback({ name, mode: "exclusive" }));
    released.set(
        name,
        result.catch(() => {}),
    );
    return result;
 }
 globalThis.navigator = { locks: { request } };
@@ -45,7 +45,6 @@ const realSetInterval = globalThis.setInterval;
 const realClearInterval = globalThis.clearInterval;
 const realSetTimeout = globalThis.setTimeout;
 const realClearTimeout = globalThis.clearTimeout;
 const realFetch = globalThis.fetch;
 // Every timeout set since the last cleanupPopup() that has neither fired nor
 // been cleared. cleanupPopup() clears them all.
@@ -261,14 +260,8 @@ async function settle() {
 async function bootPopup(stored, options) {
    jest.resetModules();
-    // The RPC requests made through src/shared/balances.js go through Node's
+    // The three modules that reach the network. None is on the path under
-    // own http and https modules, not fetch(), so the fetch() stub below would
+    // test; all would make the suite hit the internet.
    // not stop them, which is why that module stays mocked.
    // src/shared/prices.js and src/shared/transactions.js send their requests
    // through fetch(), and their mocks answer with no prices and no
    // transactions. Every request the page still sends, such as the
    // transaction screen's Blockscout lookup and the Etherscan lookup in
    // src/shared/etherscanLabels.js, meets the fetch() stub.
    jest.doMock("../../src/shared/prices", () => ({
        prices: {},
        refreshPrices: jest.fn(async () => {}),
@@ -341,12 +334,6 @@ async function bootPopup(stored, options) {
            windowListeners[name].push(fn);
        },
    };
    // Every fetch() the page makes fails, as it does elsewhere in the suite,
    // instead of reaching the internet. A new stub per boot, so the calls it
    // records start with that boot. Put back by cleanupPopup().
    globalThis.fetch = jest.fn(() => {
        throw new Error("tests must not perform network requests");
    });
    // The ten-second refresh init() starts, and a transaction wait's timers,
    // would outlive the test. So every interval is recorded rather than
    // started, clearInterval() removes it as a browser would, and tick() below
@@ -448,7 +435,6 @@ function cleanupPopup() {
    pendingTimeouts.clear();
    globalThis.setTimeout = realSetTimeout;
    globalThis.clearTimeout = realClearTimeout;
    globalThis.fetch = realFetch;
 }
 module.exports = {
@@ -8,14 +8,6 @@
 // tracks. It decodes against the address the explorer reports the transaction
 // was sent to.
 //
 // Its links open the explorer of the network the transaction was sent on,
 // whichever network is active
 // (https://git.eeqj.de/sneak/AutistMask/issues/584), and the transaction is
 // read from that network's Blockscout, the one Settings has for it
 // (https://git.eeqj.de/sneak/AutistMask/issues/623). Its decoded details name
 // the token, and scale its amount, from what the wallet knows of that
 // network's tokens (https://git.eeqj.de/sneak/AutistMask/issues/629).
 //
 // The row is the one the real history parser makes from the explorer's answer,
 // opened through transactionDetail.show(), which is what a click on the row
 // calls. Driven against a minimal DOM stub in the shape
@@ -30,10 +22,10 @@ jest.mock("../src/shared/log", () => ({
        warnf: () => {},
        errorf: () => {},
    },
-    debugFetch: async (url) => {
+    debugFetch: async (url) => ({
-        mockAsked.push(url);
+        ok: true,
-        return { ok: true, json: async () => mockExplorerAnswer(url) };
+        json: async () => mockExplorerAnswer(url),
-    },
+    }),
    setRuntimeDebug: () => {},
    isDebug: () => false,
 }));
@@ -43,13 +35,10 @@ globalThis.chrome = {
 };
 const { state } = require("../src/shared/state");
 const { NETWORKS } = require("../src/shared/networks");
 const { fetchRecentTransactions } = require("../src/shared/transactions");
 const transactionDetail = require("../src/popup/views/transactionDetail");
 const EXPLORER = "https://explorer.example/api/v2";
 // A Blockscout that knows nothing of the transaction.
 const OTHER_EXPLORER = "https://other-explorer.example/api/v2";
 const HOLDER = "0x0000000000000000000000000000000000000a11";
 const RECIPIENT = "0x711e691962E5c054b78071C789A0C8CE657377aD";
 // A token the wallet tracks and the bundled token list does not name.
@@ -62,9 +51,6 @@ const TRANSFER_DATA = new Interface([
    "function transfer(address to, uint256 amount)",
 ]).encodeFunctionData("transfer", [RECIPIENT, 1234500000n]);
 // Every URL asked of a Blockscout, in order.
 const mockAsked = [];
 // The explorer's answers: the transfer in HOLDER's token transfers, and the
 // transaction itself, sent to the token contract.
 function mockExplorerAnswer(url) {
@@ -91,11 +77,7 @@ function mockExplorerAnswer(url) {
        };
    }
    if (url === EXPLORER + "/transactions/" + TX_HASH) {
-        return {
+        return { to: { hash: TOKEN }, raw_input: TRANSFER_DATA };
            to: { hash: TOKEN },
            raw_input: TRANSFER_DATA,
            block_number: 100,
        };
    }
    return { items: [] };
 }
@@ -158,7 +140,6 @@ beforeEach(() => {
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" } };
    state.blockscoutUrl = EXPLORER;
    state.networkEndpoints = {};
    state.wallets = [
        {
            name: "Main",
@@ -167,18 +148,13 @@ beforeEach(() => {
        },
    ];
    state.trackedTokens = [{ address: TOKEN, symbol: "TDOL", decimals: 6 }];
    state.networkTrackedTokens = {};
    state.viewData = {};
    state.viewStack = [];
    state.currentView = null;
 });
 test("a token transfer's decoded details name the token contract and the amount at its scale", async () => {
-    const [row] = await fetchRecentTransactions(
+    const [row] = await fetchRecentTransactions(HOLDER, EXPLORER, 1);
        HOLDER,
        EXPLORER,
        NETWORKS.mainnet.chainId,
    );
    expect(row.to).toBe(RECIPIENT);
    expect(row.contractAddress).toBe(TOKEN.toLowerCase());
@@ -198,96 +174,3 @@ test("a token transfer's decoded details name the token contract and the amount
        '<div class="font-bold">1234.5000 TDOL</div>',
    );
 });
 // Mainnet is active, and its Blockscout knows nothing of the transaction. The
 // row was read from the Blockscout Settings remembers for Sepolia, and the
 // screen reads the transaction from there too, so every link on it is drawn.
 test("with mainnet active, a Sepolia transaction is read from Sepolia's Blockscout and its links open the Sepolia explorer", async () => {
    state.networkId = "mainnet";
    state.blockscoutUrl = OTHER_EXPLORER;
    state.networkEndpoints = { sepolia: { blockscoutUrl: EXPLORER } };
    const [row] = await fetchRecentTransactions(
        HOLDER,
        EXPLORER,
        NETWORKS.sepolia.chainId,
    );
    transactionDetail.show(row);
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
    const sepolia = "https://sepolia.etherscan.io";
    const links = (id) =>
        [...node(id).innerHTML.matchAll(/href="([^"]*)"/g)].map((m) => m[1]);
    expect(links("tx-detail-hash")).toEqual([`${sepolia}/tx/${TX_HASH}`]);
    expect(links("tx-detail-from")).toEqual([`${sepolia}/address/${HOLDER}`]);
    expect(links("tx-detail-to")).toEqual([`${sepolia}/address/${RECIPIENT}`]);
    expect(links("tx-detail-token-contract")).toEqual([
        `${sepolia}/token/${TOKEN.toLowerCase()}`,
    ]);
    expect(links("tx-detail-block")).toEqual([`${sepolia}/block/100`]);
    expect(links("tx-detail-calldata-details")).toEqual([
        `${sepolia}/address/${TOKEN}`,
        `${sepolia}/address/${RECIPIENT}`,
    ]);
 });
 test("with mainnet active and no Blockscout remembered for Sepolia, a Sepolia transaction is asked of Sepolia's default Blockscout", async () => {
    state.networkId = "mainnet";
    state.blockscoutUrl = OTHER_EXPLORER;
    const [row] = await fetchRecentTransactions(
        HOLDER,
        EXPLORER,
        NETWORKS.sepolia.chainId,
    );
    mockAsked.length = 0;
    transactionDetail.show(row);
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
    expect(mockAsked).toEqual([
        NETWORKS.sepolia.defaultBlockscoutUrl + "/transactions/" + TX_HASH,
    ]);
 });
 // Open the Sepolia transfer's detail screen with mainnet active, and wait for
 // its decoded details.
 async function showSepoliaTransferWithMainnetActive() {
    state.networkId = "mainnet";
    state.blockscoutUrl = OTHER_EXPLORER;
    state.networkEndpoints = { sepolia: { blockscoutUrl: EXPLORER } };
    const [row] = await fetchRecentTransactions(
        HOLDER,
        EXPLORER,
        NETWORKS.sepolia.chainId,
    );
    transactionDetail.show(row);
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
 }
 test("with mainnet active, a Sepolia token transfer's decoded details name the token tracked on Sepolia and its amount at its scale", async () => {
    state.trackedTokens = [];
    state.networkTrackedTokens = {
        sepolia: [{ address: TOKEN, symbol: "TDOL", decimals: 6 }],
    };
    await showSepoliaTransferWithMainnetActive();
    expect(decodedLine("Token")).toContain('<div class="font-bold">TDOL</div>');
    expect(decodedLine("Amount")).toContain(
        '<div class="font-bold">1234.5000 TDOL</div>',
    );
 });
 // The same contract address on mainnet is another token, so what the wallet
 // tracks and holds there names nothing on Sepolia.
 test("with mainnet active, a Sepolia token transfer's decoded details take nothing from mainnet's tracked tokens or balances", async () => {
    state.trackedTokens = [{ address: TOKEN, symbol: "MDOL", decimals: 18 }];
    state.wallets[0].addresses[0].tokenBalances = [
        { address: TOKEN, symbol: "MDOL", decimals: 18, balance: "1.0" },
    ];
    await showSepoliaTransferWithMainnetActive();
    expect(decodedLine("Token")).not.toContain("MDOL");
    expect(decodedLine("Amount")).toContain(
        '<div class="font-bold">1234500000 base units (decimals unknown)</div>',
    );
 });
@@ -1,372 +0,0 @@
 // Tracked tokens are kept per network, and the two add-token screens offer the
 // bundled token list, which holds Ethereum Mainnet contracts, on Ethereum
 // Mainnet only (https://git.eeqj.de/sneak/AutistMask/issues/523), including on
 // the screen "Back" lands on after a switch made from the Settings gear and for
 // a contract lookup that answers after one. Driven through the real popup over
 // a stored profile; the same switch made by the background is in
 // tests/coldWorkerChainSwitch.test.js.
 const {
    bootPopup,
    cleanupPopup,
    unversionedValidProfile,
    ADDRESS,
    TOKEN_ADDRESS,
 } = require("./support/popupBoot");
 const { NETWORKS } = require("../src/shared/networks");
 const SEPOLIA_TOKEN = {
    address: TOKEN_ADDRESS,
    symbol: "TST",
    decimals: 18,
    name: "Test Token",
 };
 const MAINNET_TOKEN = {
    address: "0x6B175474E89094C44Da98b954EedeAC495271d0F",
    symbol: "DAI",
    decimals: 18,
    name: "Dai Stablecoin",
 };
 // Tracked on neither network.
 const NEW_TOKEN_ADDRESS = "0xBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB";
 const NETWORK_CHANGED_FLASH =
    "The active network changed before the lookup finished, so the token was" +
    " not added.";
 afterEach(() => {
    cleanupPopup();
 });
 // The popup reopened onto SettingsAddToken, on `networkId`.
 function bootOnAddToken(networkId, extra) {
    return bootPopup(
        unversionedValidProfile({
            networkId,
            currentView: "settings-addtoken",
            ...extra,
        }),
    );
 }
 // The popup reopened onto AddressDetail on Ethereum Mainnet, with DAI tracked
 // there and TST tracked on Sepolia.
 function bootOnAddress() {
    return bootPopup(
        unversionedValidProfile({
            currentView: "address",
            selectedWallet: 0,
            selectedAddress: 0,
            trackedTokens: [MAINNET_TOKEN],
            networkTrackedTokens: { sepolia: [SEPOLIA_TOKEN] },
        }),
    );
 }
 // The popup reopened onto AddressToken for `token`, with AddressDetail beneath
 // it, over the same tracked tokens as bootOnAddress().
 function bootOnToken(token) {
    return bootPopup(
        unversionedValidProfile({
            currentView: "address-token",
            viewStack: ["main", "address"],
            selectedWallet: 0,
            selectedAddress: 0,
            selectedToken: token,
            trackedTokens: [MAINNET_TOKEN],
            networkTrackedTokens: { sepolia: [SEPOLIA_TOKEN] },
        }),
    );
 }
 // AddressToken for `token` opened from AddressDetail, as tapping the token's
 // row there does.
 async function openToken(boot, token) {
    const { state } = require("../src/shared/state");
    state.selectedToken = token;
    require("../src/popup/views/helpers").pushCurrentView();
    require("../src/popup/views/addressToken").show();
    await boot.settle();
 }
 // Presses `addButton` with a contract lookup that answers only after the
 // Settings gear and a switch to `networkId`.
 async function addAcrossSwitch(boot, addButton, networkId) {
    const { lookupTokenInfo } = require("../src/shared/balances");
    let answer;
    lookupTokenInfo.mockImplementationOnce(
        () =>
            new Promise((resolve) => {
                answer = resolve;
            }),
    );
    const adding = boot.click(addButton);
    await boot.click("btn-settings");
    await chooseNetwork(boot, networkId);
    answer({ symbol: "NEW", decimals: 18, name: "New Token" });
    await adding;
 }
 // Picks `networkId` in the Settings network selector, as the user does.
 async function chooseNetwork(boot, networkId) {
    const select = boot.node("settings-network");
    select.value = networkId;
    for (const fn of select.listeners.change) await fn();
    await boot.settle();
 }
 // The Settings gear, a switch to Sepolia, and Back.
 async function gearSwitchBack(boot) {
    await boot.click("btn-settings");
    expect(boot.visibleViews()).toEqual(["settings"]);
    await chooseNetwork(boot, "sepolia");
    await boot.click("btn-settings-back");
 }
 describe.each([
    ["mainnet", false],
    ["sepolia", true],
 ])("on %s", (networkId, hidden) => {
    test(`the common tokens are hidden: ${hidden}`, async () => {
        const boot = await bootOnAddToken(networkId);
        expect(boot.pageErrors).toEqual([]);
        expect(boot.visibleViews()).toEqual(["settings-addtoken"]);
        expect(boot.hidden("settings-addtoken-common")).toBe(hidden);
        require("../src/popup/views/addToken").show();
        expect(boot.visibleViews()).toEqual(["add-token"]);
        expect(boot.hidden("add-token-common")).toBe(hidden);
    });
 });
 test("a token added by contract address on Sepolia is tracked on Sepolia only", async () => {
    const boot = await bootOnAddToken("sepolia", {
        networkTrackedTokens: { mainnet: [MAINNET_TOKEN] },
    });
    const stored = () => boot.storage.read("autistmask");
    const { lookupTokenInfo } = require("../src/shared/balances");
    lookupTokenInfo.mockResolvedValueOnce({
        symbol: SEPOLIA_TOKEN.symbol,
        decimals: SEPOLIA_TOKEN.decimals,
        name: SEPOLIA_TOKEN.name,
    });
    boot.node("settings-addtoken-address").value = TOKEN_ADDRESS;
    await boot.click("btn-settings-addtoken-manual");
    expect(lookupTokenInfo).toHaveBeenCalledWith(
        TOKEN_ADDRESS,
        expect.any(String),
        "sepolia",
        expect.anything(),
    );
    expect(stored().trackedTokens).toEqual([SEPOLIA_TOKEN]);
    await chooseNetwork(boot, "mainnet");
    expect(stored().networkId).toBe("mainnet");
    expect(stored().trackedTokens).toEqual([MAINNET_TOKEN]);
    const onMainnet = boot.node("settings-tracked-tokens").innerHTML;
    expect(onMainnet).toContain("DAI");
    expect(onMainnet).not.toContain("TST");
    await chooseNetwork(boot, "sepolia");
    expect(stored().networkId).toBe("sepolia");
    expect(stored().trackedTokens).toEqual([SEPOLIA_TOKEN]);
    const onSepolia = boot.node("settings-tracked-tokens").innerHTML;
    expect(onSepolia).toContain("TST");
    expect(onSepolia).not.toContain("DAI");
 });
 describe("Back after a switch from the Settings gear", () => {
    test("SettingsAddToken no longer offers the common tokens", async () => {
        const boot = await bootOnAddToken("mainnet");
        expect(boot.hidden("settings-addtoken-common")).toBe(false);
        await gearSwitchBack(boot);
        expect(boot.visibleViews()).toEqual(["settings-addtoken"]);
        expect(boot.hidden("settings-addtoken-common")).toBe(true);
    });
    test("AddressDetail lists the new network's tracked tokens", async () => {
        const boot = await bootOnAddress();
        expect(boot.node("address-balances").innerHTML).toContain("DAI");
        await gearSwitchBack(boot);
        expect(boot.visibleViews()).toEqual(["address"]);
        const balances = boot.node("address-balances").innerHTML;
        expect(balances).toContain("TST");
        expect(balances).not.toContain("DAI");
    });
    // Neither can be rendered from saved state, so neither is landed on.
    test.each([
        ["btn-add-token", "add-token"],
        ["btn-send", "send"],
    ])("from over %s, it lands on AddressDetail", async (button, view) => {
        const boot = await bootOnAddress();
        await boot.click(button);
        expect(boot.visibleViews()).toEqual([view]);
        await gearSwitchBack(boot);
        expect(boot.visibleViews()).toEqual(["address"]);
        expect(boot.node("address-balances").innerHTML).not.toContain("DAI");
    });
    // DAI was picked on Ethereum Mainnet, where alone it is tracked.
    test.each([
        [
            "opened from AddressDetail",
            async () => {
                const boot = await bootOnAddress();
                await openToken(boot, MAINNET_TOKEN.address);
                return boot;
            },
        ],
        ["in a reopened popup", () => bootOnToken(MAINNET_TOKEN.address)],
    ])(
        "from AddressToken for DAI %s, it lands on AddressDetail",
        async (_how, open) => {
            const boot = await open();
            expect(boot.visibleViews()).toEqual(["address-token"]);
            expect(boot.text("address-token-title")).toContain("DAI");
            await gearSwitchBack(boot);
            expect(boot.visibleViews()).toEqual(["address"]);
            const balances = boot.node("address-balances").innerHTML;
            expect(balances).toContain("TST");
            expect(balances).not.toContain("DAI");
        },
    );
    // The stack is saved cut with the switch, so a popup closed straight after
    // it and reopened onto Settings lands where this one would. Loading a
    // saved stack cuts it at AddToken and Send as well, but not at
    // AddressToken.
    test.each([
        [
            "AddressToken for DAI",
            (boot) => openToken(boot, MAINNET_TOKEN.address),
        ],
        ["AddToken", (boot) => boot.click("btn-add-token")],
        ["Send", (boot) => boot.click("btn-send")],
    ])(
        "from %s, a popup reopened after the switch lands on AddressDetail",
        async (_view, open) => {
            const boot = await bootOnAddress();
            await open(boot);
            await boot.click("btn-settings");
            await chooseNetwork(boot, "sepolia");
            const reopened = await bootPopup(boot.storage.read("autistmask"));
            expect(reopened.visibleViews()).toEqual(["settings"]);
            await reopened.click("btn-settings-back");
            expect(reopened.visibleViews()).toEqual(["address"]);
            const balances = reopened.node("address-balances").innerHTML;
            expect(balances).toContain("TST");
            expect(balances).not.toContain("DAI");
        },
    );
    test("AddressToken for the native token is drawn again for the new network", async () => {
        const boot = await bootOnToken("ETH");
        expect(boot.visibleViews()).toEqual(["address-token"]);
        await gearSwitchBack(boot);
        expect(boot.visibleViews()).toEqual(["address-token"]);
        expect(boot.text("address-token-title")).toContain("SepoliaETH");
    });
    // A popup reopened onto ConfirmTx has no Send beneath it, so "Back" draws
    // ConfirmTx again from the saved transaction. It is drawn for the network
    // the transaction was reviewed on, and Sign & Send refuses it on the new
    // one.
    test("ConfirmTx reviewed on Sepolia is not sent on Ethereum Mainnet", async () => {
        const boot = await bootPopup(
            unversionedValidProfile({
                networkId: "sepolia",
                currentView: "confirm-tx",
                selectedWallet: 0,
                selectedAddress: 0,
                viewData: {
                    pendingTx: {
                        token: "ETH",
                        from: ADDRESS,
                        to: ADDRESS,
                        amount: "1",
                        chainId: NETWORKS.sepolia.chainId,
                    },
                },
            }),
        );
        expect(boot.visibleViews()).toEqual(["confirm-tx"]);
        await boot.click("btn-settings");
        await chooseNetwork(boot, "mainnet");
        globalThis.fetch.mockClear();
        await boot.click("btn-settings-back");
        expect(boot.visibleViews()).toEqual(["confirm-tx"]);
        // Drawn again: its Etherscan label check asks Sepolia's explorer.
        expect(globalThis.fetch.mock.calls.map((call) => call[0])).toEqual([
            NETWORKS.sepolia.explorerUrl + "/address/" + ADDRESS,
        ]);
        expect(boot.text("confirm-type")).toBe("Native SepoliaETH transfer");
        boot.node("confirm-tx-password").value = "any password";
        await boot.click("btn-confirm-send");
        expect(boot.visibleViews()).toEqual(["confirm-tx"]);
        expect(
            boot.node("confirm-network-changed-error").style.visibility,
        ).toBe("visible");
        // Refused before the password is even tried.
        expect(boot.text("confirm-tx-password-error")).toBe("");
    });
    test("without a wallet, it lands on Welcome", async () => {
        const boot = await bootPopup(undefined);
        expect(boot.visibleViews()).toEqual(["welcome"]);
        await gearSwitchBack(boot);
        expect(boot.visibleViews()).toEqual(["welcome"]);
    });
    test("a later Back onto Settings keeps what was typed there", async () => {
        const boot = await bootOnAddress();
        await boot.click("btn-settings");
        await chooseNetwork(boot, "sepolia");
        boot.node("settings-rpc").value = "https://typed.example";
        await boot.click("btn-settings-add-token");
        expect(boot.visibleViews()).toEqual(["settings-addtoken"]);
        await boot.click("btn-settings-addtoken-back");
        expect(boot.visibleViews()).toEqual(["settings"]);
        expect(boot.value("settings-rpc")).toBe("https://typed.example");
    });
 });
 describe("a contract lookup that answers after a switch adds nothing", () => {
    test("from SettingsAddToken", async () => {
        const boot = await bootOnAddToken("sepolia", {
            networkTrackedTokens: { mainnet: [MAINNET_TOKEN] },
        });
        const stored = () => boot.storage.read("autistmask");
        boot.node("settings-addtoken-address").value = NEW_TOKEN_ADDRESS;
        await addAcrossSwitch(boot, "btn-settings-addtoken-manual", "mainnet");
        expect(boot.visibleViews()).toEqual(["settings"]);
        expect(boot.text("flash-msg")).toBe(NETWORK_CHANGED_FLASH);
        expect(stored().trackedTokens).toEqual([MAINNET_TOKEN]);
        expect(stored().networkTrackedTokens.sepolia).toEqual([]);
    });
    test("from AddToken", async () => {
        const boot = await bootOnAddress();
        const stored = () => boot.storage.read("autistmask");
        await boot.click("btn-add-token");
        boot.node("add-token-address").value = NEW_TOKEN_ADDRESS;
        await addAcrossSwitch(boot, "btn-add-token-confirm", "sepolia");
        expect(boot.visibleViews()).toEqual(["settings"]);
        expect(boot.text("flash-msg")).toBe(NETWORK_CHANGED_FLASH);
        expect(stored().trackedTokens).toEqual([SEPOLIA_TOKEN]);
        expect(stored().networkTrackedTokens.mainnet).toEqual([MAINNET_TOKEN]);
    });
 });
@@ -29,13 +29,8 @@ jest.mock("../src/shared/log", () => ({
 }));
 const mockReceiptLookup = jest.fn();
 // The RPC URL and network of every node a wait was given.
 const mockNodes = [];
 jest.mock("../src/shared/balances", () => ({
-    getProvider: (rpcUrl, networkId) => {
+    getProvider: () => ({ getTransactionReceipt: mockReceiptLookup }),
        mockNodes.push({ rpcUrl, networkId });
        return { getTransactionReceipt: mockReceiptLookup };
    },
    refreshBalances: jest.fn(),
 }));
@@ -112,7 +107,6 @@ global.chrome = { storage };
 const txStatus = require("../src/popup/views/txStatus");
 const { state } = require("../src/shared/state");
 const { NETWORKS } = require("../src/shared/networks");
 const { RESTORABLE_VIEWS } = require("../src/shared/restorableViews");
 const { log } = require("../src/shared/log");
@@ -124,7 +118,6 @@ const TX_INFO = {
    amount: "0.0050",
    token: "ETH",
    tokenSymbol: null,
    chainId: NETWORKS.mainnet.chainId,
 };
 // True when a view element is not hidden.
@@ -144,14 +137,8 @@ beforeEach(() => {
    jest.setSystemTime(new Date("2026-08-11T12:00:00Z"));
    elements.clear();
    mockReceiptLookup.mockReset();
    mockNodes.length = 0;
    log.errorf.mockClear();
    state.networkId = "mainnet";
    state.rpcUrl = NETWORKS.mainnet.defaultRpcUrl;
    state.networkEndpoints = {};
    state.wallets = [];
    state.trackedTokens = [];
    state.networkTrackedTokens = {};
    state.viewData = {};
    state.viewStack = [];
    state.currentView = null;
@@ -362,14 +349,14 @@ describe("WaitTx persistence across popup close", () => {
            // out of restoreView().
            {
                hash: TX_HASH,
-                txInfo: { ...TX_INFO, to: 42 },
+                txInfo: { to: 42, amount: "0.0050" },
                broadcastTime: Date.now(),
            },
            // Otherwise complete but an array: only Array.isArray() rejects
            // it, since typeof [] is "object" and the fields are present.
            {
                hash: TX_HASH,
-                txInfo: Object.assign([], TX_INFO),
+                txInfo: Object.assign([], { to: RECIPIENT, amount: "0.0050" }),
                broadcastTime: Date.now(),
            },
            {
@@ -377,18 +364,6 @@ describe("WaitTx persistence across popup close", () => {
                txInfo: { to: RECIPIENT },
                broadcastTime: Date.now(),
            },
            // Otherwise complete but for a chain id naming no network: there
            // is no node to ask for the receipt, and no explorer to link to.
            {
                hash: TX_HASH,
                txInfo: { ...TX_INFO, chainId: undefined },
                broadcastTime: Date.now(),
            },
            {
                hash: TX_HASH,
                txInfo: { ...TX_INFO, chainId: "0x5" },
                broadcastTime: Date.now(),
            },
        ]) {
            state.viewData = { pendingWait: bad };
            expect(txStatus.restoreWait()).toBe(false);
@@ -524,154 +499,6 @@ describe("WaitTx when the popup closes", () => {
    });
 });
 // The popup can reopen onto WaitTx after Settings switched the network. The
 // wait asked the active network's node for the receipt, never found it, and
 // reported a timeout, and its links went to the active network's explorer
 // (https://git.eeqj.de/sneak/AutistMask/issues/584).
 describe("WaitTx for a Sepolia transaction with mainnet active", () => {
    const SEPOLIA_NODE = "https://sepolia.node.example.invalid";
    const sepoliaTx = { ...TX_INFO, chainId: NETWORKS.sepolia.chainId };
    beforeEach(() => {
        state.rpcUrl = "https://mainnet.node.example.invalid";
        state.networkEndpoints = { sepolia: { rpcUrl: SEPOLIA_NODE } };
    });
    test("the receipt is asked of the Sepolia node Settings has", async () => {
        mockReceiptLookup.mockResolvedValue({ blockNumber: 21000000 });
        state.viewData = {
            pendingWait: {
                txInfo: sepoliaTx,
                hash: TX_HASH,
                broadcastTime: Date.now(),
            },
        };
        expect(txStatus.restoreWait()).toBe(true);
        await jest.advanceTimersByTimeAsync(0);
        expect(mockNodes).toEqual([
            { rpcUrl: SEPOLIA_NODE, networkId: "sepolia" },
        ]);
        expect(state.currentView).toBe("success-tx");
    });
    test("the recipient and hash link to the Sepolia explorer", () => {
        mockReceiptLookup.mockResolvedValue(null);
        txStatus.showWait(sepoliaTx, TX_HASH);
        expect(getElement("wait-tx-to").innerHTML).toContain(
            `href="https://sepolia.etherscan.io/address/${RECIPIENT}"`,
        );
        expect(getElement("wait-tx-hash").innerHTML).toContain(
            `href="https://sepolia.etherscan.io/tx/${TX_HASH}"`,
        );
    });
 });
 // SuccessTx and ErrorTx follow WaitTx and describe the same transaction, but
 // their links went to the active network's explorer
 // (https://git.eeqj.de/sneak/AutistMask/issues/622). Each test checks the
 // screen again after rendering it from its stored view data alone, as a
 // reopened popup does.
 describe("SuccessTx and ErrorTx for a Sepolia transaction with mainnet active", () => {
    const SEPOLIA_EXPLORER = "https://sepolia.etherscan.io";
    const TOKEN = "0x1c7D4B196Cb0C7B01d743Fbc6116a902379C7238";
    const sepoliaTx = { ...TX_INFO, chainId: NETWORKS.sepolia.chainId };
    test("the recipient, block and hash on SuccessTx link to the Sepolia explorer", async () => {
        function expectSepoliaLinks() {
            expect(getElement("success-tx-to").innerHTML).toContain(
                `href="${SEPOLIA_EXPLORER}/address/${RECIPIENT}"`,
            );
            expect(getElement("success-tx-block").innerHTML).toContain(
                `href="${SEPOLIA_EXPLORER}/block/21000000"`,
            );
            expect(getElement("success-tx-hash").innerHTML).toContain(
                `href="${SEPOLIA_EXPLORER}/tx/${TX_HASH}"`,
            );
        }
        mockReceiptLookup.mockResolvedValue({ blockNumber: 21000000 });
        txStatus.showWait(sepoliaTx, TX_HASH);
        await jest.advanceTimersByTimeAsync(10000);
        expect(state.currentView).toBe("success-tx");
        expectSepoliaLinks();
        elements.clear();
        txStatus.renderSuccess();
        expectSepoliaLinks();
    });
    test("the addresses in SuccessTx's decoded action link to the Sepolia explorer", async () => {
        function expectSepoliaLinks() {
            const html = getElement("success-tx-decoded").innerHTML;
            expect(html).toContain(
                `href="${SEPOLIA_EXPLORER}/address/${TOKEN}"`,
            );
            expect(html).toContain(
                `href="${SEPOLIA_EXPLORER}/address/${RECIPIENT}"`,
            );
        }
        const decoded = {
            name: "Transfer",
            details: [
                { label: "Token", address: TOKEN, isToken: true },
                { label: "Recipient", address: RECIPIENT },
            ],
        };
        mockReceiptLookup.mockResolvedValue({ blockNumber: 21000000 });
        txStatus.showWait({ ...sepoliaTx, decoded }, TX_HASH);
        await jest.advanceTimersByTimeAsync(10000);
        expect(state.currentView).toBe("success-tx");
        expectSepoliaLinks();
        elements.clear();
        txStatus.renderSuccess();
        expectSepoliaLinks();
    });
    // https://git.eeqj.de/sneak/AutistMask/issues/629
    test("SuccessTx's decoded action names the token from the tokens tracked on Sepolia", async () => {
        function expectTokenNamed() {
            expect(getElement("success-tx-decoded").innerHTML).toContain(
                '<div class="font-bold">TDOL</div>',
            );
        }
        state.networkTrackedTokens = {
            sepolia: [{ address: TOKEN, symbol: "TDOL", decimals: 6 }],
        };
        const decoded = {
            name: "Transfer",
            details: [{ label: "Token", address: TOKEN, isToken: true }],
        };
        mockReceiptLookup.mockResolvedValue({ blockNumber: 21000000 });
        txStatus.showWait({ ...sepoliaTx, decoded }, TX_HASH);
        await jest.advanceTimersByTimeAsync(10000);
        expect(state.currentView).toBe("success-tx");
        expectTokenNamed();
        elements.clear();
        txStatus.renderSuccess();
        expectTokenNamed();
    });
    test("the recipient and hash on ErrorTx link to the Sepolia explorer", () => {
        function expectSepoliaLinks() {
            expect(getElement("error-tx-to").innerHTML).toContain(
                `href="${SEPOLIA_EXPLORER}/address/${RECIPIENT}"`,
            );
            expect(getElement("error-tx-hash").innerHTML).toContain(
                `href="${SEPOLIA_EXPLORER}/tx/${TX_HASH}"`,
            );
        }
        txStatus.showError(sepoliaTx, TX_HASH, "The transaction failed.");
        expectSepoliaLinks();
        elements.clear();
        txStatus.renderError();
        expectSepoliaLinks();
    });
 });
 describe("wait-tx is a view the popup may reopen onto", () => {
    // The resume feature is wired through RESTORABLE_VIEWS: restoreView()
    // refuses any view not in the set, so dropping "wait-tx" from it kills
@@ -7,12 +7,6 @@
 // only when the transaction is sent to a Universal Router deployment on the
 // network it is for; anywhere else it is left to the raw data.
 //
 // The transaction history labelled any call named `execute` or `multicall` a
 // Swap, whatever address it went to
 // (https://git.eeqj.de/sneak/AutistMask/issues/580). It now does so only for
 // such a call sent to a Universal Router deployment on the network the
 // transaction is on; any other is labelled by its method name.
 //
 // The transaction detail screen and the approval screen are driven against a
 // minimal DOM stub in the shape tests/tokenTransferDetail.test.js uses, the
 // approval screen opened the way tests/swapStatusAmount.test.js opens it.
@@ -39,7 +33,6 @@ globalThis.chrome = {
 };
 const { state } = require("../src/shared/state");
 const { fetchRecentTransactions } = require("../src/shared/transactions");
 const approval = require("../src/popup/views/approval");
 const { decodeCalldata } = approval;
 const transactionDetail = require("../src/popup/views/transactionDetail");
@@ -54,8 +47,6 @@ const SEPOLIA_ROUTER = "0x3a9d48ab9751398bbfa63ad67599bb04e4bdf98b";
 const ROUTER_ON_BOTH = "0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD";
 // The address with no code from the issue.
 const ORDINARY = "0x0b0050Da68435b3EcBC236c40F16dB2070bCD79A";
 // A contract that is not a router, such as a multisig.
 const OTHER_CONTRACT = "0x5afe000000000000000000000000000000005afe";
 const RECIPIENT = "0xC0FfEE0000000000000000000000000000c0fFEe";
 const SEPOLIA_WETH = "0xfFf9976782d46CC05630D1f6eBAb18b2324d6B14";
@@ -138,13 +129,8 @@ describe("execute() calldata on the approval screen's decoder", () => {
 // The transaction the explorer reports: SWAP_DATA, sent to `mockSentTo`.
 const TX_HASH = "0x" + "5".repeat(64);
 let mockSentTo = null;
 // The transactions the explorer reports for RECIPIENT's history.
 let mockHistory = [];
 function mockExplorerAnswer(url) {
    if (url.endsWith("/addresses/" + RECIPIENT + "/transactions")) {
        return { items: mockHistory };
    }
    if (url.endsWith("/transactions/" + TX_HASH)) {
        return {
            to: { hash: mockSentTo },
@@ -200,126 +186,57 @@ function node(id) {
    return globalThis.document.getElementById(id);
 }
-// Open the transaction detail screen with `activeNetworkId` active, for the
+// Open the transaction detail screen with Sepolia active, for the
-// history row `row`, and wait for its decoded details.
+// transaction the explorer reports sent to `sentTo`, and wait for its
-async function showDetail(row, activeNetworkId) {
+// decoded details.
-    mockSentTo = row.to;
+async function showDetailSentTo(sentTo) {
    mockSentTo = sentTo;
    globalThis.document = makeDocument();
    globalThis.window = { location: { search: "" } };
-    state.networkId = activeNetworkId;
+    state.networkId = "sepolia";
    state.blockscoutUrl = "https://explorer.example/api/v2";
    state.viewData = {};
    state.viewStack = [];
    state.currentView = null;
-    transactionDetail.show(row);
+    transactionDetail.show({
        hash: TX_HASH,
        from: RECIPIENT,
        to: sentTo,
        value: "",
        symbol: "SepoliaETH",
        timestamp: 1790000000,
        isError: false,
        direction: "contract",
        directionLabel: "Swap",
        method: "execute",
        chainId: SEPOLIA,
    });
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
 }
 // Open the transaction detail screen with `activeNetworkId` active, for the
 // Sepolia transaction the explorer reports sent to `sentTo`, and wait for its
 // decoded details.
 async function showDetailSentTo(sentTo, activeNetworkId) {
    await showDetail(
        {
            hash: TX_HASH,
            from: RECIPIENT,
            to: sentTo,
            value: "",
            symbol: "SepoliaETH",
            timestamp: 1790000000,
            isError: false,
            direction: "contract",
            directionLabel: "Swap",
            method: "execute",
            chainId: SEPOLIA,
        },
        activeNetworkId,
    );
 }
 describe("execute() calldata on the transaction detail screen", () => {
    test("sent to a router on the active network, it is a swap", async () => {
-        await showDetailSentTo(SEPOLIA_ROUTER, "sepolia");
+        await showDetailSentTo(SEPOLIA_ROUTER);
        expect(node("tx-detail-calldata-details").innerHTML).toContain(
            "Swap via Uniswap Universal Router",
        );
    });
    // https://git.eeqj.de/sneak/AutistMask/issues/623
    test("sent to a router on its network, with the other network active, it is a swap", async () => {
        await showDetailSentTo(SEPOLIA_ROUTER, "mainnet");
        expect(node("tx-detail-calldata-details").innerHTML).toContain(
            "Swap via Uniswap Universal Router",
        );
    });
    test("sent to an ordinary address, it is not decoded", async () => {
-        await showDetailSentTo(ORDINARY, "sepolia");
+        await showDetailSentTo(ORDINARY);
        expect(node("tx-detail-calldata-action").textContent).toBe("execute");
        expect(node("tx-detail-calldata-details").innerHTML).toBe("");
        expect(node("tx-detail-rawdata").innerHTML).toContain(SWAP_DATA);
    });
    test("sent to a router of the other network only, it is not decoded", async () => {
-        await showDetailSentTo(MAINNET_ROUTER, "sepolia");
+        await showDetailSentTo(MAINNET_ROUTER);
        expect(node("tx-detail-calldata-action").textContent).toBe("execute");
        expect(node("tx-detail-calldata-details").innerHTML).toBe("");
        expect(node("tx-detail-rawdata").innerHTML).toContain(SWAP_DATA);
    });
 });
 // The history row made from the explorer's answer for RECIPIENT's `method`
 // call sent to the contract `sentTo` on the network with `chainId`. The
 // explorer gives the address in checksummed form.
 async function historyRow(method, sentTo, chainId) {
    mockHistory = [
        {
            hash: TX_HASH,
            block_number: 7000000,
            timestamp: "2026-09-01T00:00:00Z",
            from: { hash: RECIPIENT },
            to: { hash: getAddress(sentTo), is_contract: true },
            value: "0",
            method,
            status: "ok",
        },
    ];
    const rows = await fetchRecentTransactions(
        RECIPIENT,
        "https://explorer.example/api/v2",
        chainId,
    );
    return rows[0];
 }
 // The history row's label and TransactionDetail's Type line, for a Sepolia
 // transaction. The active network does not decide either.
 describe.each([
    ["execute", "Execute"],
    ["multicall", "Multicall"],
 ])("a %s() call in the history", (method, methodLabel) => {
    test("sent to a router on its network, it is a Swap", async () => {
        const row = await historyRow(method, SEPOLIA_ROUTER, SEPOLIA);
        expect(row.directionLabel).toBe("Swap");
        await showDetail(row, "mainnet");
        expect(node("tx-detail-type").textContent).toBe("Swap");
    });
    test("sent to another contract, it is labelled by its method name", async () => {
        const row = await historyRow(method, OTHER_CONTRACT, SEPOLIA);
        expect(row.directionLabel).toBe(methodLabel);
        await showDetail(row, "sepolia");
        expect(node("tx-detail-type").textContent).toBe("Contract Call");
    });
    test("sent to a router of the other network only, it is labelled by its method name", async () => {
        const row = await historyRow(method, MAINNET_ROUTER, SEPOLIA);
        expect(row.directionLabel).toBe(methodLabel);
        await showDetail(row, "mainnet");
        expect(node("tx-detail-type").textContent).toBe("Contract Call");
    });
 });
 // Open the approval screen with Ethereum Mainnet active, for a site's Sepolia
 // transaction that sends SWAP_DATA to `sentTo`.
 async function showApprovalSentTo(sentTo) {
@@ -53,14 +53,7 @@ function unwrapData() {
 }
 function detail(data, label, sources) {
-    // Sent by the address the swap pays, so the output is the user's.
+    const decoded = uniswap.decode(data, ROUTER, "0x1", sources || {});
    const decoded = uniswap.decode(
        data,
        ROUTER,
        "0x1",
        sources || {},
        RECIPIENT,
    );
    return decoded.details.find((d) => d.label === label);
 }
@@ -71,8 +71,6 @@ function exactInParams(currencyIn, path, amountIn, amountOutMin) {
 // BALANCE_CHECK_ERC20 (command 0x0e): (address owner, address token,
 // uint256 minBalance). It names the output token and nothing about the input.
 // Its owner is USER, the transaction's sender: a check of any other address
 // names no output token.
 function balanceCheck(token, minBalance) {
    return coder.encode(
        ["address", "address", "uint256"],
@@ -80,13 +78,8 @@ function balanceCheck(token, minBalance) {
    );
 }
 // A transaction from USER.
 function decode(data) {
    return uniswap.decode(data, ROUTER, "0x1", {}, USER);
 }
 function detail(data, label) {
-    const decoded = decode(data);
+    const decoded = uniswap.decode(data, ROUTER, "0x1", {});
    expect(decoded).not.toBeNull();
    return decoded.details.find((d) => d.label === label);
 }
@@ -94,7 +87,7 @@ function detail(data, label) {
 describe("an execute() whose input currency never decoded", () => {
    // A V4_SWAP whose sub-action params do not decode — an action encoding
    // this decoder does not know — leaves every V4 token null. The
-    // BALANCE_CHECK still names the output, so the screen has a minimum
+    // BALANCE_CHECK still names the output, so the screen has a Min. received
    // figure and a Token Out, and previously claimed the user was paying ETH
    // for them.
    const data = () =>
@@ -120,7 +113,9 @@ describe("an execute() whose input currency never decoded", () => {
    });
    test("does not name ETH in the swap title either", () => {
-        expect(decode(data()).name).toBe("Uniswap Swap");
+        expect(uniswap.decode(data(), ROUTER, "0x1", {}).name).toBe(
            "Uniswap Swap",
        );
    });
 });
@@ -130,13 +125,14 @@ describe("an execute() that names only an output token", () => {
    test("refuses the input rather than defaulting it to ETH", () => {
        expect(detail(data(), "Token In").value).toBe(REFUSAL);
-        expect(decode(data()).name).toBe("Uniswap Swap");
+        expect(uniswap.decode(data(), ROUTER, "0x1", {}).name).toBe(
            "Uniswap Swap",
        );
    });
    test("still states the output it did establish", () => {
        expect(detail(data(), "Token Out").value).toContain("USDT");
-        // No step pays anyone, so the minimum is not said to be received.
+        expect(detail(data(), "Min. received").value).toBe("2.0000 USDT");
        expect(detail(data(), "Min. paid out").value).toBe("2.0000 USDT");
    });
 });
@@ -178,7 +174,9 @@ describe("native ETH in, which V4 spells as the zero address", () => {
        expect(detail(data, "Token In").value).toBe("ETH (native)");
        expect(detail(data, "Amount").value).toBe("1.0000 ETH");
-        expect(decode(data).name).toBe("Swap ETH → USDT");
+        expect(uniswap.decode(data, ROUTER, "0x1", {}).name).toBe(
            "Swap ETH → USDT",
        );
    });
    test("WRAP_ETH is still ETH at 18 decimals", () => {
@@ -105,7 +105,7 @@ function v3ExactIn(tokenIn, tokenOut, amountIn, amountOutMin) {
 }
 function detail(data, label) {
-    const decoded = uniswap.decode(data, ROUTER, "0x1", {}, USER);
+    const decoded = uniswap.decode(data, ROUTER, "0x1", {});
    expect(decoded).not.toBeNull();
    return decoded.details.find((d) => d.label === label);
 }
@@ -134,9 +134,7 @@ describe("a V4 step that states a Min. received but no output currency", () => {
    });
    test("refuses to scale Min. received rather than assuming 18", () => {
-        // With no TAKE, no step pays the user either, so the line is not
+        expect(detail(data(), "Min. received").value).toBe(
        // labelled received.
        expect(detail(data(), "Min. paid out").value).toBe(
            unknownDecimalsAmount(MIN_OUT),
        );
    });
@@ -82,8 +82,7 @@ function walletsHolding(token, decimals) {
 // decodeCalldata() rather than uniswap.decode() directly, because the scale
 // sources the screen supplies are part of what is under test.
 function swapDetail(data, label) {
-    // Sent by the address the swap pays, so the output is the user's.
+    const decoded = decodeCalldata(data, ROUTER, "0x1");
    const decoded = decodeCalldata(data, ROUTER, "0x1", RECIPIENT);
    return decoded.details.find((d) => d.label === label);
 }
@@ -39,8 +39,7 @@ jest.mock("../src/shared/log", () => ({
 // Everything the confirmation screen would reach the network for. The gas
 // estimate is the point: with a usable scale it must succeed, so that a failure
-// in these tests is a failure of the scale and not of the stub. The address
+// in these tests is a failure of the scale and not of the stub.
 // holds the 1 ETH the wallets below record, and `tokenUnits` of the token.
 const mockProvider = {
    getFeeData: async () => ({
        maxFeePerGas: 2000000000n,
@@ -49,14 +48,7 @@ const mockProvider = {
    estimateGas: async () => 21000n,
    getCode: async () => "0x",
    getTransactionCount: async () => 1,
-    getBalance: async () => 1000000000000000000n,
+    getBalance: async () => 0n,
    tokenUnits: 0n,
    // The one contract call the screen makes, balanceOf().
    call: async () =>
        AbiCoder.defaultAbiCoder().encode(
            ["uint256"],
            [mockProvider.tokenUnits],
        ),
 };
 jest.mock("../src/shared/balances", () => {
@@ -120,9 +112,9 @@ global.document = {
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
 };
-global.navigator.clipboard = { writeText() {} };
+global.navigator = { clipboard: { writeText() {} } };
-const { AbiCoder, parseUnits } = require("ethers");
+const { parseUnits } = require("ethers");
 const { fetchTokenBalances } = require("../src/shared/balances");
 const { debugFetch } = require("../src/shared/log");
 const { state } = require("../src/shared/state");
@@ -163,9 +155,8 @@ function row(token = {}, value = FIVE_WETH) {
 }
 // Fetch the explorer's rows through the real fetcher and put them exactly where
-// refreshBalances() puts them. The node reports the holding the explorer does.
+// refreshBalances() puts them.
 async function fetchOnto(items) {
    mockProvider.tokenUnits = BigInt(items[0].value);
    debugFetch.mockImplementation(async () => ({
        ok: true,
        status: 200,
@@ -190,7 +181,6 @@ async function fetchOnto(items) {
 // is from the first. Two addresses is what it takes to reach
 // explorerDecimals()'s disagreement check, which is only reachable across rows.
 async function fetchOntoBoth(itemsA, itemsB) {
    mockProvider.tokenUnits = BigInt(itemsA[0].value);
    debugFetch.mockImplementation(async () => ({
        ok: true,
        status: 200,
@@ -249,12 +239,6 @@ function errors() {
    return el("confirm-errors").innerHTML;
 }
 // The message for an amount the balance does not cover, while it is shown.
 function balanceError() {
    const box = el("confirm-balance-error");
    return box.style.visibility === "visible" ? box.textContent : "";
 }
 function sendDisabled() {
    return el("btn-confirm-send").disabled;
 }
@@ -286,6 +270,7 @@ describe("the Send screen resolves the scale rather than reading the stored one"
        const txInfo = await reviewSend(WETH, "1.5");
        expect(txInfo.tokenDecimals).toBe(18);
        expect(txInfo.tokenDecimals).not.toBe(balances[0].decimals);
        expect(txInfo.tokenBalance).toBe("5.0");
    });
    test("that scale estimates a fee and leaves Send enabled", async () => {
@@ -322,10 +307,11 @@ describe("the Send screen resolves the scale rather than reading the stored one"
        // No fallback was introduced: resolution answers null here, and the
        // null is what goes forward.
        expect(txInfo.tokenDecimals).toBeNull();
        expect(txInfo.tokenBalance).toBeNull();
        confirmTx.show(txInfo);
        await settle();
        expect(text("confirm-balance")).toBe("unknown (NOVEL)");
-        expect(balanceError()).toContain("This token's balance is unknown");
+        expect(errors()).toContain("This token&#39;s balance is unknown");
        expect(sendDisabled()).toBe(true);
    });
 });
@@ -369,8 +355,7 @@ describe("a scale the explorer's own rows disagree about", () => {
        const txInfo = await reviewSend(NOVEL, "1.5");
        expect(txInfo.tokenDecimals).toBeNull();
        // The regression this closes: null scale alongside a non-null balance.
-        send.updateSendBalance();
+        expect(txInfo.tokenBalance).toBeNull();
        expect(text("send-balance")).toBe("Current balance: unknown (NOVEL)");
    });
    test("so the user is told the balance is unknown, not only that the fee failed", async () => {
@@ -382,7 +367,8 @@ describe("a scale the explorer's own rows disagree about", () => {
        // confirm-fee-unknown-error — "the network fee could not be
        // estimated... please go back and try again" — as the only explanation
        // for a screen that can never proceed.
-        expect(balanceError()).toContain("This token's balance is unknown");
+        expect(errors()).not.toBe("");
        expect(errors()).toContain("This token&#39;s balance is unknown");
        expect(text("confirm-balance")).toBe("unknown (NOVEL)");
        expect(sendDisabled()).toBe(true);
        // The fee line still reports the estimate as unavailable, because it
@@ -448,20 +434,31 @@ describe("a scale the explorer's own rows disagree about", () => {
        expect(text("send-balance")).toBe("Current balance: 5.0000 NOVEL");
        const txInfo = await reviewSend(NOVEL, "1.5");
        expect(txInfo.tokenDecimals).toBe(6);
        expect(txInfo.tokenBalance).toBe("5.0");
        confirmTx.show(txInfo);
        await settle();
        expect(text("confirm-balance")).toBe("5.0000 NOVEL");
        expect(errors()).toBe("");
        expect(balanceError()).toBe("");
        expect(sendDisabled()).toBe(false);
    });
 });
 describe("the confirmation screen tells an unknown balance from a zero one", () => {
-    // A send of 1.5 NOVEL from an address the node reports none of, with the
+    function txInfo(tokenBalance) {
-    // token's scale `tokenDecimals`, or null for a scale nobody knows.
+        return {
-    async function render(tokenDecimals) {
+            from: HOLDER,
-        mockProvider.tokenUnits = 0n;
+            to: RECIPIENT,
            ensName: null,
            amount: "1.5",
            token: NOVEL,
            balance: "1.0",
            tokenSymbol: "NOVEL",
            tokenBalance,
            tokenDecimals: tokenBalance === null ? null : 18,
        };
    }
    async function render(tokenBalance) {
        state.wallets = [
            {
                name: "Wallet 1",
@@ -472,40 +469,30 @@ describe("the confirmation screen tells an unknown balance from a zero one", ()
        ];
        state.selectedWallet = 0;
        state.selectedAddress = 0;
-        confirmTx.show({
+        confirmTx.show(txInfo(tokenBalance));
            from: HOLDER,
            to: RECIPIENT,
            ensName: null,
            amount: "1.5",
            token: NOVEL,
            tokenSymbol: "NOVEL",
            tokenDecimals,
        });
        await settle();
-        return { balance: text("confirm-balance"), message: balanceError() };
+        return { balance: text("confirm-balance"), errors: errors() };
    }
    test("the balance line states unknown rather than a quantity of zero", async () => {
        const unknown = await render(null);
-        const zero = await render(18);
+        const zero = await render("0.0");
        expect(unknown.balance).not.toBe(zero.balance);
        expect(unknown.balance).toBe("unknown (NOVEL)");
        expect(zero.balance).toBe("0.0000 NOVEL");
    });
    // Both hit INSUFFICIENT_TOKEN — an unknown balance is treated as nothing to
-    // spend from, which is the fail-closed side — but "your balance does not
+    // spend from, which is the fail-closed side — but "you have 0.0" is a claim
-    // cover this amount" is a claim about the holding, and this one has no
+    // about the holding, and this one has no established quantity to claim.
-    // established quantity to claim.
+    test("the insufficient-balance message names the reason, not a figure", async () => {
    test("the insufficient-balance message names the reason, not a shortfall", async () => {
        const unknown = await render(null);
-        const zero = await render(18);
+        const zero = await render("0.0");
-        expect(unknown.message).toContain("This token's balance is unknown");
+        expect(unknown.errors).not.toBe(zero.errors);
-        expect(unknown.message).not.toContain("does not cover");
+        expect(unknown.errors).toContain("This token&#39;s balance is unknown");
-        expect(zero.message).toBe(
+        expect(unknown.errors).not.toContain("You have");
-            "Your NOVEL balance does not cover this amount. Please go back and" +
+        expect(zero.errors).toContain("You have 0.0000 NOVEL");
-                " send a smaller amount.",
+        expect(zero.errors).not.toContain("balance is unknown");
        );
    });
 });
@@ -475,7 +475,7 @@ describe("every way to a signature or the private key refuses a defective wallet
                to: RECIPIENT,
                value: "0x0",
                data: "0x",
-                chainId: "0x1",
+                chainId: 1,
                nonce: 0,
                gasLimit: "21000",
                maxFeePerGas: "1000000000",