chore: the native token's label follows the network (closes #372)

networks.js gives each network a nativeCurrency (ETH, SepoliaETH) and nothing
read it: every screen wrote ETH. The wallet's balances and the Send and
confirmation screens now use the active network's. A transaction's figures use
the network its chain id names, through nativeCurrencyByChainId(): the
approval value and fee, the wait, success and error screens, history entries,
the detail screen and the fee-limit refusal, so a site switching networks
cannot make one read as another network's coin. The "ETH" that selectedToken
and txInfo.token hold is the native token's id and is unchanged. A token
reporting any network's nativeCurrency is a spoof, and the detail screen calls
an entry a token transfer when it has a token contract.

Model: opus-5-5

src/popup/index.html

@@ -640,19 +640,13 @@
                         Double-check the address before sending.
                     </div>
                 </div>
+                <!-- Its sentence names the network's native token, so show()
+                in confirmTx.js sets it. -->
                 <div
                     id="confirm-contract-warning"
-                    class="mb-2"
+                    class="mb-2 border border-red-500 border-dashed p-2 text-xs font-bold text-red-500"
                     style="visibility: hidden"
-                >
-                    <div
-                        class="border border-red-500 border-dashed p-2 text-xs font-bold text-red-500"
-                    >
-                        WARNING: The recipient is a smart contract. Sending ETH
-                        or tokens directly to a contract may result in permanent
-                        loss of funds.
-                    </div>
-                </div>
+                ></div>
                 <div
                     id="confirm-burn-warning"
                     class="mb-2"
@@ -690,14 +684,13 @@
                     Your balance does not cover this amount plus the network
                     fee. Please go back and send a smaller amount.
                 </div>
+                <!-- Its sentence names the network's native token, so show()
+                in confirmTx.js sets it. -->
                 <div
                     id="confirm-gas-error"
                     class="mb-2 border border-border border-dashed p-2 text-xs"
                     style="visibility: hidden"
-                >
-                    You do not have enough ETH to pay the network fee for this
-                    transfer. Please add ETH to this address and try again.
-                </div>
+                ></div>
                 <!-- Its sentence names why the fee could not be estimated,
                 so show() in confirmTx.js sets it. -->
                 <div

src/popup/views/addressDetail.js

@@ -12,7 +12,7 @@ const {
     goBack,
     pushCurrentView,
 } = require("./helpers");
-const { state, saveState } = require("../../shared/state");
+const { state, saveState, currentNetwork } = require("../../shared/state");
 const { formatAddressTotal, getAddressValue } = require("../../shared/prices");
 const {
     fetchRecentTransactions,
@@ -153,6 +153,7 @@ async function loadTransactions(address) {
         const rawTxs = await fetchRecentTransactions(
             address,
             state.blockscoutUrl,
+            currentNetwork().chainId,
         );
         const result = filterTransactions(rawTxs, {
             hideSpoofedSymbols: state.hideSpoofedSymbols,

src/popup/views/addressToken.js

@@ -10,6 +10,7 @@ const {
     addressTitle,
     escapeHtml,
     displaySymbol,
+    nativeCurrency,
     balanceLine,
     unknownableAmount,
     renderAddressHtml,
@@ -17,7 +18,7 @@ const {
     goBack,
     pushCurrentView,
 } = require("./helpers");
-const { state, saveState } = require("../../shared/state");
+const { state, saveState, currentNetwork } = require("../../shared/state");
 const { TOKEN_BY_ADDRESS, resolveSymbol } = require("../../shared/tokenList");
 const { formatUsd, getPrice } = require("../../shared/prices");
 const {
@@ -106,7 +107,7 @@ function show() {
     let symbol, amount, price;
     const knownToken = TOKEN_BY_ADDRESS.get(tokenId.toLowerCase());
     if (tokenId === "ETH") {
-        symbol = "ETH";
+        symbol = nativeCurrency();
         amount = parseFloat(addr.balance || "0");
         price = getPrice("ETH");
     } else {
@@ -226,6 +227,7 @@ async function loadTransactions(address, tokenId) {
         const rawTxs = await fetchRecentTransactions(
             address,
             state.blockscoutUrl,
+            currentNetwork().chainId,
         );
         const result = filterTransactions(rawTxs, {
             hideSpoofedSymbols: state.hideSpoofedSymbols,

src/popup/views/approval.js

@@ -12,7 +12,10 @@ const {
     formatFee,
 } = require("./helpers");
 const { state, saveState } = require("../../shared/state");
-const { networkByChainId } = require("../../shared/networks");
+const {
+    networkByChainId,
+    nativeCurrencyByChainId,
+} = require("../../shared/networks");
 const {
     formatEther,
     formatUnits,
@@ -219,8 +222,12 @@ function showTxFee(approvedTx) {
     const gasLimit = BigInt(approvedTx.gasLimit);
     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.
-    $("approve-tx-fee").textContent = formatFee(gasLimit * feePerGas);
+    // fee reads the same on both. In the native currency of the network shown
+    // above, as the value is.
+    $("approve-tx-fee").textContent = formatFee(
+        gasLimit * feePerGas,
+        nativeCurrencyByChainId(approvedTx.chainId),
+    );
 
     let detail =
         gasLimit.toString() +
@@ -264,6 +271,7 @@ function showTxApproval(details) {
         amount: formatTxValue(ethValue),
         token: "ETH",
         tokenSymbol: null,
+        chainId: approvedTx.chainId,
     };
 
     // If this is an ERC-20 call, try to extract the real recipient and amount
@@ -329,8 +337,15 @@ function showTxApproval(details) {
     const ethPrice = getPrice("ETH");
     const ethUsd = ethPrice ? parseFloat(ethValueFormatted) * 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: a site can switch the
+    // active network after this transaction is prepared and back before it is
+    // signed.
     $("approve-tx-value").textContent =
-        ethValueFormatted + " ETH" + (usdStr ? " (" + usdStr + ")" : "");
+        ethValueFormatted +
+        " " +
+        nativeCurrencyByChainId(approvedTx.chainId) +
+        (usdStr ? " (" + usdStr + ")" : "");
 
     showTxFee(approvedTx);
 

src/popup/views/confirmTx.js

@@ -11,13 +11,14 @@ const {
     addressTitle,
     escapeHtml,
     displaySymbol,
+    nativeCurrency,
     renderAddressHtml,
     attachCopyHandlers,
     goBack,
     onViewLeave,
     formatFee,
 } = require("./helpers");
-const { state } = require("../../shared/state");
+const { state, currentNetwork } = require("../../shared/state");
 const { getSignerForAddress } = require("../../shared/wallet");
 const { decryptWithPassword } = require("../../shared/vault");
 const { formatUsd, getPrice } = require("../../shared/prices");
@@ -90,7 +91,7 @@ function show(txInfo) {
     // 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 ? txInfo.tokenSymbol || "?" : "ETH";
+    const rawSymbol = isErc20 ? txInfo.tokenSymbol || "?" : nativeCurrency();
     const symbol = displaySymbol(rawSymbol);
 
     // Transaction type
@@ -98,7 +99,7 @@ function show(txInfo) {
         $("confirm-type").textContent =
             "ERC-20 token transfer (" + symbol + ")";
     } else {
-        $("confirm-type").textContent = "Native ETH transfer";
+        $("confirm-type").textContent = "Native " + symbol + " transfer";
     }
 
     // Token contract section (ERC-20 only)
@@ -162,7 +163,7 @@ function show(txInfo) {
         const bal = txInfo.balance || "0";
         const balUsd = ethPrice ? parseFloat(bal) * ethPrice : null;
         $("confirm-balance").textContent = valueWithUsd(
-            truncateAmountNeverZero(bal) + " ETH",
+            truncateAmountNeverZero(bal) + " " + symbol,
             balUsd,
         );
     }
@@ -197,6 +198,19 @@ function show(txInfo) {
     // estimate landing later never moves anything.
     $("confirm-amount-fee-error").classList.toggle("hidden", isErc20);
     $("confirm-gas-error").classList.toggle("hidden", !isErc20);
+    $("confirm-gas-error").textContent =
+        "You do not have enough " +
+        nativeCurrency() +
+        " to pay the network fee for this transfer. Please add " +
+        nativeCurrency() +
+        " to this address and try again.";
+
+    // Shown later, once checkRecipientHistory() finds a contract.
+    $("confirm-contract-warning").textContent =
+        "WARNING: The recipient is a smart contract. Sending " +
+        nativeCurrency() +
+        " or tokens directly to a contract may result in permanent loss of" +
+        " funds.";
 
     // The fee-unknown message names its cause, which is also known here.
     // Without the token's scale estimateGas() cannot encode the transfer, so
@@ -245,7 +259,9 @@ function show(txInfo) {
 // touches already occupies its space, so re-running it never moves anything.
 function renderValidation(txInfo) {
     const isErc20 = txInfo.token !== "ETH";
-    const symbol = isErc20 ? displaySymbol(txInfo.tokenSymbol || "?") : "ETH";
+    const symbol = isErc20
+        ? displaySymbol(txInfo.tokenSymbol || "?")
+        : nativeCurrency();
 
     const { canSend, codes } = validateTransfer({
         isErc20,
@@ -258,7 +274,7 @@ function renderValidation(txInfo) {
 
     // Messages carrying the user's own numbers are built here; the fixed
     // sentences live in the reserved elements in index.html, except the
-    // fee-unknown one, which show() sets.
+    // gas and fee-unknown ones, which show() sets.
     const messages = [];
     if (codes.includes(CODES.AMOUNT_INVALID)) {
         messages.push("Please enter a valid amount to send.");
@@ -287,9 +303,13 @@ function renderValidation(txInfo) {
         messages.push(
             "Insufficient balance. You have " +
                 truncateAmountNeverZero(txInfo.balance || "0") +
-                " ETH but are trying to send " +
+                " " +
+                symbol +
+                " but are trying to send " +
                 txInfo.amount +
-                " ETH.",
+                " " +
+                symbol +
+                ".",
         );
     }
 
@@ -378,17 +398,23 @@ async function estimateGas(txInfo) {
         // The fee line goes through formatFee(), as the approval screen's
         // does, so the same fee reads the same on both.
         if (estimateWei !== null && estimateWei < gasCostWei) {
-            $("confirm-fee-amount").textContent = "~" + formatFee(estimateWei);
+            $("confirm-fee-amount").textContent =
+                "~" + formatFee(estimateWei, nativeCurrency());
             $("confirm-fee-reserve").textContent =
                 "up to " +
                 truncateAmountNeverZero(formatEther(gasCostWei)) +
-                " ETH reserved";
+                " " +
+                nativeCurrency() +
+                " reserved";
             setVisible("confirm-fee-reserve", true);
         } else {
             // No spread to report: either there is no estimate, or the node
             // quotes a gas price at or above maxFeePerGas, so the expected
             // cost is not below the reserve. Show the reserve alone.
-            $("confirm-fee-amount").textContent = formatFee(gasCostWei);
+            $("confirm-fee-amount").textContent = formatFee(
+                gasCostWei,
+                nativeCurrency(),
+            );
             setVisible("confirm-fee-reserve", false);
         }
         feeStatus = FEE_KNOWN;
@@ -508,6 +534,10 @@ function init(_ctx) {
         $("btn-confirm-send").disabled = true;
         $("btn-confirm-send").classList.add("text-muted");
 
+        // The network it is sent on. The wait, success and error screens
+        // label its amount by this, not by the network active when they draw.
+        pendingTx.chainId = currentNetwork().chainId;
+
         let tx;
         try {
             const signer = getSignerForAddress(

src/popup/views/helpers.js

@@ -267,16 +267,31 @@ function unknownableAmount(balance) {
     return Number.isFinite(n) ? n : null;
 }
 
+// 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 and confirmation screens, which send on the active network, label a
+// native amount with this; a transaction already made or requested is labelled
+// by its own chain id, through nativeCurrencyByChainId() in networks.js. The
+// "ETH" that state.selectedToken and txInfo.token hold is the native token's
+// id, not its label, and stays "ETH" on every network.
+function nativeCurrency() {
+    return currentNetwork().nativeCurrency;
+}
+
 // A network fee in wei as the confirmation and approval screens both show it:
-// the ETH figure through truncateAmountNeverZero(), then its USD value when the
-// ETH price is known. The USD value is of the exact fee, not of the truncated
-// figure.
-function formatFee(wei) {
+// 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. The USD value is of the exact fee, not of the
+// truncated figure.
+function formatFee(wei, symbol) {
     const eth = formatEther(wei);
     const ethPrice = getPrice("ETH");
     const usd = ethPrice ? formatUsd(parseFloat(eth) * ethPrice) : "";
     return (
-        truncateAmountNeverZero(eth) + " ETH" + (usd ? " (" + usd + ")" : "")
+        truncateAmountNeverZero(eth) +
+        " " +
+        symbol +
+        (usd ? " (" + usd + ")" : "")
     );
 }
 
@@ -318,7 +333,7 @@ function balanceLine(symbol, amount, price, tokenId) {
 
 function balanceLinesForAddress(addr, trackedTokens, showZero) {
     let html = balanceLine(
-        "ETH",
+        nativeCurrency(),
         parseFloat(addr.balance || "0"),
         getPrice("ETH"),
         "ETH",
@@ -675,6 +690,7 @@ module.exports = {
     balanceLinesForAddress,
     addressHoldsFunds,
     unknownableAmount,
+    nativeCurrency,
     formatFee,
     addressColor,
     addressDotHtml,

src/popup/views/home.js

@@ -10,11 +10,17 @@ const {
     addressTitle,
     escapeHtml,
     displaySymbol,
+    nativeCurrency,
     renderAddressHtml,
     attachCopyHandlers,
     pushCurrentView,
 } = require("./helpers");
-const { state, saveState, currentAddress } = require("../../shared/state");
+const {
+    state,
+    saveState,
+    currentAddress,
+    currentNetwork,
+} = require("../../shared/state");
 const { notify } = require("../../shared/browserApi");
 const {
     updateSendBalance,
@@ -68,7 +74,7 @@ function renderTotalValue() {
         return;
     }
     const ethBal = parseFloat(addr.balance || "0");
-    const ethStr = ethBal.toFixed(4) + " ETH";
+    const ethStr = ethBal.toFixed(4) + " " + nativeCurrency();
     const ethUsd = ethPrice ? " (" + formatUsd(ethBal * ethPrice) + ")" : "";
     el.textContent = ethStr + ethUsd;
 
@@ -182,7 +188,11 @@ async function loadHomeTxs(ctx) {
 
     try {
         const fetches = allAddresses.map((addr) =>
-            fetchRecentTransactions(addr, state.blockscoutUrl),
+            fetchRecentTransactions(
+                addr,
+                state.blockscoutUrl,
+                currentNetwork().chainId,
+            ),
         );
         const results = await Promise.all(fetches);
 

src/popup/views/send.js

@@ -5,6 +5,8 @@ const {
     showFlash,
     addressTitle,
     displaySymbol,
+    escapeHtml,
+    nativeCurrency,
     renderAddressHtml,
     attachCopyHandlers,
     goBack,
@@ -124,7 +126,7 @@ function updateToValidation() {
 
 function renderSendTokenSelect(addr) {
     const sel = $("send-token");
-    sel.innerHTML = '<option value="ETH">ETH</option>';
+    sel.innerHTML = `<option value="ETH">${escapeHtml(nativeCurrency())}</option>`;
     const fraudSet = new Set(
         (state.fraudContracts || []).map((a) => a.toLowerCase()),
     );
@@ -204,7 +206,8 @@ function updateSendBalance() {
         $("send-balance").textContent =
             "Current balance: " +
             truncateAmountNeverZero(addr.balance || "0") +
-            " ETH";
+            " " +
+            nativeCurrency();
     } else {
         const symbol = resolveSymbol(
             token,

src/popup/views/transactionDetail.js

@@ -21,6 +21,7 @@ const {
     goBack,
 } = require("./helpers");
 const { state } = require("../../shared/state");
+const { nativeCurrencyByChainId } = require("../../shared/networks");
 const { formatEther, formatUnits } = require("ethers");
 const makeBlockie = require("ethereum-blockies-base64");
 const { log, debugFetch } = require("../../shared/log");
@@ -41,8 +42,10 @@ function getTransactionType(tx) {
             return "Token Approval";
         return "Contract Call";
     }
-    if (tx.symbol && tx.symbol !== "ETH") return "ERC-20 Token Transfer";
-    return "Native ETH Transfer";
+    // By the token contract, not the symbol: a token chooses its own symbol
+    // and can report the native token's, but only a token transfer has one.
+    if (tx.contractAddress) return "ERC-20 Token Transfer";
+    return "Native " + nativeCurrencyByChainId(tx.chainId) + " Transfer";
 }
 
 function blockieHtml(address) {
@@ -84,6 +87,11 @@ function show(tx) {
             isContractCall: tx.isContractCall || false,
             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:
+            // a site can switch the active network before a later popup
+            // shows this screen again.
+            chainId: tx.chainId,
         },
     };
     render();
@@ -179,7 +187,7 @@ function render() {
         if (el) el.classList.add("hidden");
     }
 
-    loadFullTxDetails(tx.hash, tx.to);
+    loadFullTxDetails(tx.hash, tx.to, tx.chainId);
 
     const isoStr = isoDate(tx.timestamp);
     $("tx-detail-time").innerHTML =
@@ -197,7 +205,7 @@ function showDetailField(sectionId, contentId, value) {
     section.classList.remove("hidden");
 }
 
-function populateOnChainDetails(txData) {
+function populateOnChainDetails(txData, chainId) {
     // Block number
     if (txData.block_number != null) {
         const blockLink = explorerUrl("block", String(txData.block_number));
@@ -227,7 +235,7 @@ function populateOnChainDetails(txData) {
         showDetailField(
             "tx-detail-fee-section",
             "tx-detail-fee",
-            feeEth + " ETH",
+            feeEth + " " + nativeCurrencyByChainId(chainId),
         );
     }
 
@@ -287,7 +295,7 @@ function populateOnChainDetails(txData) {
     }
 }
 
-async function loadFullTxDetails(txHash, toAddress) {
+async function loadFullTxDetails(txHash, toAddress, chainId) {
     const section = $("tx-detail-calldata-section");
     const actionEl = $("tx-detail-calldata-action");
     const detailsEl = $("tx-detail-calldata-details");
@@ -304,7 +312,7 @@ async function loadFullTxDetails(txHash, toAddress) {
         const txData = await resp.json();
 
         // Populate on-chain detail fields (block, nonce, gas, fee)
-        populateOnChainDetails(txData);
+        populateOnChainDetails(txData, chainId);
 
         const inputData = txData.raw_input || txData.input || null;
         if (!inputData || inputData === "0x") return;

src/popup/views/txStatus.js

@@ -16,6 +16,7 @@ const {
 } = require("./helpers");
 const { resolveTokenSymbol } = require("../../shared/approvalAmount");
 const { state } = require("../../shared/state");
+const { nativeCurrencyByChainId } = require("../../shared/networks");
 const { getProvider } = require("../../shared/balances");
 const { log } = require("../../shared/log");
 
@@ -86,9 +87,13 @@ function startWait(txInfo, txHash, broadcastTime, pollNow) {
     endWait();
     const id = waitId;
 
+    // A native amount, here and on the success and error screens, is in the
+    // native currency of txInfo.chainId, the network the transaction was sent
+    // on, not the active network's: a site can switch the active network
+    // while this screen is open or before a later popup resumes it.
     const symbol =
         txInfo.token === "ETH"
-            ? "ETH"
+            ? nativeCurrencyByChainId(txInfo.chainId)
             : displaySymbol(txInfo.tokenSymbol || "?");
     $("wait-tx-summary").textContent = txInfo.amount + " " + symbol;
     $("wait-tx-to").innerHTML = toAddressHtml(txInfo.to);
@@ -193,9 +198,10 @@ 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.token and
-// txInfo.tokenSymbol are deliberately unchecked: they are compared and
-// coalesced rather than dereferenced, and tokenSymbol is null for ETH.
+// broadcastTime leaves an unexitable wait counting "NaNs". txInfo.token,
+// txInfo.tokenSymbol and txInfo.chainId are deliberately unchecked: they are
+// compared and coalesced rather than dereferenced, and tokenSymbol is null for
+// ETH.
 function restoreWait() {
     const d = state.viewData;
     if (!d || !d.pendingWait) return false;
@@ -223,7 +229,7 @@ function showSuccess(txInfo, txHash, blockNumber) {
 
     const symbol =
         txInfo.token === "ETH"
-            ? "ETH"
+            ? nativeCurrencyByChainId(txInfo.chainId)
             : displaySymbol(txInfo.tokenSymbol || "?");
     state.viewData = {
         amount: txInfo.amount,
@@ -320,7 +326,7 @@ function showError(txInfo, txHash, message) {
 
     const symbol =
         txInfo.token === "ETH"
-            ? "ETH"
+            ? nativeCurrencyByChainId(txInfo.chainId)
             : displaySymbol(txInfo.tokenSymbol || "?");
     state.viewData = {
         amount: txInfo.amount,

src/shared/approvalVerify.js

@@ -54,9 +54,11 @@ const {
     formatEther,
     getAddress,
     getBytes,
+    toQuantity,
     verifyMessage,
     verifyTypedData,
 } = require("ethers");
+const { nativeCurrencyByChainId } = require("./networks");
 
 // The only transaction types this wallet signs: legacy, EIP-2930 and
 // EIP-1559. populateTransaction() produces nothing else, so nothing else can
@@ -407,12 +409,21 @@ function assertWithinCeilings(tx) {
             price = normalizeQuantity(tx.gasPrice, "gas price");
         }
         if (price !== null && gasLimit * price > MAX_TOTAL_FEE) {
+            // The fee is paid in the native currency of the network the
+            // transaction is for. Every caller's transaction names it.
+            const nativeCurrency = nativeCurrencyByChainId(
+                present(tx.chainId) ? toQuantity(tx.chainId) : null,
+            );
             throw refuse(
                 "This transaction would allow a network fee of up to " +
                     formatEther(gasLimit * price) +
-                    " ETH, which is more than the " +
+                    " " +
+                    nativeCurrency +
+                    ", which is more than the " +
                     formatEther(MAX_TOTAL_FEE) +
-                    " ETH this wallet will sign for.",
+                    " " +
+                    nativeCurrency +
+                    " this wallet will sign for.",
             );
         }
     }

src/shared/networks.js

@@ -76,6 +76,15 @@ function networkByChainId(chainId) {
     return null;
 }
 
+// The native currency of the network with this chain id. A transaction's
+// value and fee are labelled with the one of the chain the transaction is on,
+// which need not be the active network. `ETH` when the chain id is missing or
+// no network here has it.
+function nativeCurrencyByChainId(chainId) {
+    const network = networkByChainId(chainId);
+    return network ? network.nativeCurrency : "ETH";
+}
+
 // Build a block explorer link for the given path type and value.
 // type: "address" | "tx" | "token" | "block"
 function explorerLink(network, type, value) {
@@ -89,5 +98,6 @@ module.exports = {
     isKnownNetworkId,
     networkById,
     networkByChainId,
+    nativeCurrencyByChainId,
     explorerLink,
 };

src/shared/symbolSpoof.js

@@ -11,8 +11,8 @@
 // KNOWN_SYMBOLS maps a symbol to the set of lowercased contract addresses
 // that may bear it, or to null.  Null means the symbol belongs to the native
 // asset, which has no contract at all, so no contract may bear it and every
-// one that does is a spoof.  "ETH" is the only such entry today; the rule is
-// written so that a second one needs no change here or at any call site.
+// one that does is a spoof.  "ETH" is one such entry, and every network's
+// `nativeCurrency` in networks.js (`SepoliaETH`) is another, on every network.
 //
 // The value is a set because a ticker is not unique: seven symbols in the
 // bundled list belong to two real contracts each, and answering with one of

src/shared/tokenList.js

@@ -6,6 +6,7 @@
 // 511 tokens.
 
 const { debugFetch } = require("./log");
+const { NETWORKS } = require("./networks");
 
 const COINDESK_API = "https://data-api.coindesk.com/index/cc/v1/latest/tick";
 
@@ -3610,7 +3611,9 @@ for (const t of TOKENS) {
 // Build a map of symbol (uppercased) -> the set of contract addresses
 // (lowercased) that legitimately bear it.  Used for spoofed-symbol detection.
 // "ETH" maps to null: the native asset has no contract, so no contract may
-// bear its symbol.
+// bear its symbol. So does every network's `nativeCurrency` in networks.js
+// (`SepoliaETH`), on every network, since that is the label the wallet shows
+// its native asset under on that network.
 //
 // The value is a set and not a single address because tickers are not unique
 // and the list above proves it: seven of these 512 tokens share a symbol with
@@ -3624,6 +3627,9 @@ for (const t of TOKENS) {
 // loosen the rule, because a contract outside the set is still a spoof.
 const KNOWN_SYMBOLS = new Map();
 KNOWN_SYMBOLS.set("ETH", null);
+for (const network of Object.values(NETWORKS)) {
+    KNOWN_SYMBOLS.set(network.nativeCurrency.toUpperCase(), null);
+}
 for (const t of TOKENS) {
     const upper = t.symbol.toUpperCase();
     if (!KNOWN_SYMBOLS.has(upper)) {

src/shared/transactions.js

@@ -11,6 +11,7 @@ const { log, debugFetch } = require("./log");
 const { TOKEN_BY_ADDRESS } = require("./tokenList");
 const { parseHoldersCount, isLowHolderCount } = require("./holders");
 const { isSpoofedSymbol } = require("./symbolSpoof");
+const { nativeCurrencyByChainId } = require("./networks");
 // The uint8 test every scale in this wallet goes through. Shared, not copied:
 // a scale is either reported or it is unknown, and "unknown" must mean the
 // same thing here as it does on the screens that refuse to format one.
@@ -28,7 +29,7 @@ function normalizeAddress(addr) {
     return (addr || "").toLowerCase();
 }
 
-function parseTx(tx, addrLower) {
+function parseTx(tx, addrLower, chainId) {
     const from = tx.from?.hash || "";
     const to = tx.to?.hash || "";
     const rawWei = tx.value || "0";
@@ -36,7 +37,7 @@ function parseTx(tx, addrLower) {
     const method = tx.method || null;
 
     // For contract calls, produce a meaningful label instead of "0.0000 ETH"
-    let symbol = "ETH";
+    let symbol = nativeCurrencyByChainId(chainId);
     let value = formatTxValue(formatEther(rawWei));
     let exactValue = formatEther(rawWei);
     let rawAmount = rawWei;
@@ -90,10 +91,11 @@ function parseTx(tx, addrLower) {
         holders: null,
         isContractCall: toIsContract,
         method: method,
+        chainId: chainId,
     };
 }
 
-function parseTokenTransfer(tt, addrLower) {
+function parseTokenTransfer(tt, addrLower, chainId) {
     const from = tt.from?.hash || "";
     const to = tt.to?.hash || "";
     // The explorer's own answer, or null. Never a default: a transfer of
@@ -139,6 +141,7 @@ function parseTokenTransfer(tt, addrLower) {
         // low-holder filter declines to judge a null, so a legitimate token
         // is not hidden because a field went missing upstream.
         holders: parseHoldersCount(tt.token?.holders_count),
+        chainId: chainId,
     };
 }
 
@@ -221,7 +224,15 @@ function mergeTransactions(txs, tokenTransfers) {
     return merged;
 }
 
-async function fetchRecentTransactions(address, blockscoutUrl, count = 25) {
+// `chainId` is the chain id of the network `blockscoutUrl` serves. Every entry
+// carries it, and a native entry is labelled with that network's
+// `nativeCurrency` from networks.js (`ETH`, `SepoliaETH`).
+async function fetchRecentTransactions(
+    address,
+    blockscoutUrl,
+    chainId,
+    count = 25,
+) {
     log.debugf("fetchRecentTransactions", address);
     const addrLower = normalizeAddress(address);
 
@@ -254,8 +265,10 @@ async function fetchRecentTransactions(address, blockscoutUrl, count = 25) {
     const ttJson = ttResp.ok ? await ttResp.json() : {};
 
     const txs = mergeTransactions(
-        (txJson.items || []).map((tx) => parseTx(tx, addrLower)),
-        (ttJson.items || []).map((tt) => parseTokenTransfer(tt, addrLower)),
+        (txJson.items || []).map((tx) => parseTx(tx, addrLower, chainId)),
+        (ttJson.items || []).map((tt) =>
+            parseTokenTransfer(tt, addrLower, chainId),
+        ),
     );
 
     const result = txs.slice(0, count);