fix: the swap summary is shown only for a transaction sent to a Universal Router (closes #520)

The Universal Router decoder recognised execute() by its selector alone, so
the same calldata sent to any address was described as a swap through the
router. It now keeps the router deployments Uniswap publishes for Ethereum
Mainnet and Sepolia, and decodes only a transaction sent to one of them on
its network, ignoring address case. TxApproval passes the transaction's
chain id, TransactionDetail the active network's.

Model: opus-5-5

src/shared/uniswap.js

@@ -8,6 +8,7 @@ const {
     resolveTokenSymbol,
     unknownDecimalsAmount,
 } = require("./approvalAmount");
+const { NETWORKS } = require("./networks");
 
 const coder = AbiCoder.defaultAbiCoder();
 
@@ -15,6 +16,41 @@ const ROUTER_IFACE = new Interface([
     "function execute(bytes commands, bytes[] inputs, uint256 deadline)",
 ]);
 
+// The Universal Router deployments on each network, by chain id, copied from
+// the deployment files Uniswap publishes, each address named by its key there.
+// The files also list `UnsupportedProtocol`, which is not a router.
+const ROUTER_ADDRESSES = new Map([
+    [
+        NETWORKS.mainnet.chainId,
+        // https://github.com/Uniswap/universal-router/blob/543e1a19d6e21e31ced2512eec5792b50f13a0ba/deploy-addresses/mainnet.json
+        [
+            "0xEf1c6E67703c7BD7107eed8303Fbe6EC2554BF6B", // UniversalRouterV1
+            "0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD", // UniversalRouterV1_2_V2Support
+            "0x66a9893cc07d91d95644aedd05d03f95e1dba8af", // UniversalRouterV2
+            "0x4C82D1fBFe28C977cBB58D8C7FF8FCF9F70a2cCA", // UniversalRouterV2_1_1
+            "0x23617e59A5925b2A4Bf75d73ff6711cD0b29De85", // UniversalRouterV2_1_2
+        ],
+    ],
+    [
+        NETWORKS.sepolia.chainId,
+        // https://github.com/Uniswap/universal-router/blob/543e1a19d6e21e31ced2512eec5792b50f13a0ba/deploy-addresses/sepolia.json
+        [
+            "0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD", // UniversalRouterV1_2_V2Support
+            "0x3a9d48ab9751398bbfa63ad67599bb04e4bdf98b", // UniversalRouterV2
+            "0x7DfD4F31be6814D2906BDE155c3e1B146EAc1468", // UniversalRouterV2_1_1
+            "0x7E4f6c5e954Da5c61B3423D81E2277431Ac043f3", // UniversalRouterV2_1_2
+        ],
+    ],
+]);
+
+// Whether `address` is a Universal Router deployment on the network with this
+// chain id. Address case is ignored.
+function isRouterAddress(address, chainId) {
+    const routers = ROUTER_ADDRESSES.get(chainId) || [];
+    const wanted = (address || "").toLowerCase();
+    return routers.some((router) => router.toLowerCase() === wanted);
+}
+
 // Universal Router command IDs (lower 5 bits of each command byte)
 const COMMAND_NAMES = {
     0x00: "V3 Swap (Exact In)",
@@ -120,7 +156,7 @@ const NO_MINIMUM = "None (no minimum guaranteed)";
 const MAX_UINT160 = BigInt("0xffffffffffffffffffffffffffffffffffffffff");
 
 // WETH, the token UNWRAP_WETH turns into ETH: on mainnet, then on Sepolia.
-// decode() is not told the network, so it takes either.
+// Either one counts on either network.
 const WETH_ADDRESSES = [
     "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
     "0xfff9976782d46cc05630d1f6ebab18b2324d6b14",
@@ -559,10 +595,15 @@ function decodeV4Swap(input) {
     }
 }
 
-// Try to decode a Universal Router execute() call.
+// Try to decode a Universal Router execute() call sent to `toAddress` on the
+// network with chain id `chainId`.
 // Returns { name, description, details } matching the format used by
-// the approval UI, or null if the calldata is not a recognised execute().
-function decode(data, toAddress, sources) {
+// the approval UI, or null if the calldata is not a recognised execute() or
+// `toAddress` is not a Universal Router on that network: the same calldata
+// sent to any other contract is not a swap through the router, whatever that
+// contract does with it.
+function decode(data, toAddress, chainId, sources) {
+    if (!isRouterAddress(toAddress, chainId)) return null;
     try {
         const parsed = ROUTER_IFACE.parseTransaction({ data });
         if (!parsed) return null;