fix: sum total amount leaving the taker's account

src/index.ts

@@ -86,7 +86,13 @@ export async function parseSwap({
     (log) => log.from.toLowerCase() === taker.toLowerCase()
   );
 
-  let input = fromTaker.length ? fromTaker[0] : logs[0];
+  let input = fromTaker.length
+    ? fromTaker.reduce((acc, curr) => ({
+        ...acc,
+        amount: formatUnits(acc.amountRaw + curr.amountRaw, curr.decimals),
+        amountRaw: acc.amountRaw + curr.amountRaw,
+      }))
+    : logs[0];
 
   let output =
     nativeAmountToTaker === "0"

src/tests/index.test.ts

@@ -550,6 +550,37 @@ test("parse a gasless swap on Base (DEGEN for USDC) for SettlerMetaTxn", async (
   });
 });
 
+// https://basescan.org/tx/0x3d032fdd216315c3dce7bcafeac0805ec18d27c7c9fdf43836cab7fb61332a6d
+test("parse a swap on Base (KEIRA for ETH) for Settler", async () => {
+  const publicClient = createPublicClient({
+    chain: base,
+    transport: http(
+      `https://base-mainnet.g.alchemy.com/v2/${process.env.ALCHEMY_API_KEY}`
+    ),
+  }) as PublicClient<Transport, Chain>;
+
+  const transactionHash =
+    "0x3d032fdd216315c3dce7bcafeac0805ec18d27c7c9fdf43836cab7fb61332a6d";
+
+  const result = await parseSwap({
+    publicClient,
+    transactionHash,
+  });
+
+  expect(result).toEqual({
+    tokenIn: {
+      symbol: "KEIRA",
+      amount: "27538.512122127777968652",
+      address: "0x710eEc215b3bB653d42fC6e70E0531eA13F51A7A",
+    },
+    tokenOut: {
+      symbol: "ETH",
+      amount: "0.035509880980229712",
+      address: "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
+    },
+  });
+});
+
 // https://arbiscan.io/tx/0xb2c05194e4ec9ae0f82098ec82a606df544e87c8d6b7726bbb4b1dcc023cb9d7
 test("parse a gasless swap on on Arbitrum (ARB for ETH)", async () => {
   const publicClient = createPublicClient({

src/types.ts

@@ -50,6 +50,7 @@ export interface EnrichedLog {
   amount: string;
   address: Address;
   decimals: number;
+  amountRaw: bigint;
 }
 
 export interface Trace {

src/utils/index.ts

@@ -107,12 +107,13 @@ export async function transferLogs({
       const decimals = results[midpoint + index].result as number;
       const amount =
         log.data === "0x" ? "0" : formatUnits(BigInt(log.data), decimals);
+      const amountRaw = log.data === "0x" ? 0n : BigInt(log.data);
       const { address, topics } = log;
       const { 1: fromHex, 2: toHex } = topics;
       const from = getAddress(convertHexToAddress(fromHex));
       const to = getAddress(convertHexToAddress(toHex));
 
-      return { to, from, symbol, amount, address, decimals };
+      return { to, from, symbol, amount, amountRaw, address, decimals };
     })
     .filter((log) => log.amount !== "0");