fix: WaitTx and TransactionDetail use the network the transaction was sent on (closes #584)

WaitTx asked the active network's node for the receipt, so after a network
switch a transaction sent on the other network was never found and was
reported as timed out. It now asks the node of the network its chain id
names, through reviewedNetworkProvider(), moved from ConfirmTx into the
shared view helpers so both screens use one function. WaitTx and
TransactionDetail build their explorer links for that network too. A stored
wait or transaction whose chain id names no network is refused on restore,
as a stored ConfirmTx transaction already is.

Model: opus-5-5

src/popup/views/helpers.js

@@ -19,6 +19,7 @@ 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");
@@ -607,6 +608,20 @@ const EXT_ICON =
     `<path d="M7 1.5h3.5V5M7 5.5L10.5 1.5"/>` +
     `</svg></span>`;
 
+// The node of the network a transaction was reviewed for, the one its chain id
+// names, which need not be the active one: the popup can reopen onto ConfirmTx
+// or WaitTx after Settings switched the network. Its RPC URL is the one
+// Settings has for that network: the active network's is state.rpcUrl, any
+// other's the one remembered for it (see applyChainSwitchFields()).
+function reviewedNetworkProvider(txInfo) {
+    const net = networkByChainId(txInfo.chainId);
+    if (net.id === state.networkId) {
+        return getProvider(state.rpcUrl, net.id);
+    }
+    const remembered = state.networkEndpoints[net.id] || {};
+    return getProvider(remembered.rpcUrl || net.defaultRpcUrl, 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
 // the active network when no chain id is given; only the path segment is
@@ -762,6 +777,7 @@ module.exports = {
     attachCopyHandlers,
     etherscanLinkHtml,
     explorerUrl,
+    reviewedNetworkProvider,
     EXT_ICON,
     truncateMiddle,
     isoDate,