[bug] Transactions are failing to parse

[barskhianfannie]

0x-parser version

2.12.0

Unexpected behavior

The parser returns null or fails to parse swap data for:

1. https://optimistic.etherscan.io/tx/0xdee6f4fea0250f297ed9663c4ca4479e8a253c62e16faa60759e25832cd1f34f

   • wstETH → ETH swap on Optimism

2. https://basescan.org/tx/0x701a78e3d6fe85f45b488c8dd77f589ccb98f609620cd9abeb03c8e926f70f96

   • AERO → USDC swap on Base routing through Aerodrome + BMX + Uniswap V3 + Balancer

Both scenarios result in failed parsing despite being valid swap transactions.

Expected behavior

The parser should successfully extract swap data for both scenarios:

1. The first txn mentioned above should return:

{
  "tokenIn": {
    "symbol": "wstETH",
    "amount": "0.008868",
    "address": "0x.."
  },
  "tokenOut": {
    "symbol": "ETH",
    "amount": "0.010671015314389981",
    "address": "0x.."
  }
}

2. The second txn should return:

{
  "tokenIn": {
    "symbol": "AERO",
    "amount": "1234.567",
    "address": "0x..."
  },
  "tokenOut": {
    "symbol": "USDC",
    "amount": "890.123",
    "address": "0x..."
  }
}

The parser should handle these by using transfer logs to determine what the user sent and received.

Steps to reproduce

No response

Minimal reproducible demo of issue

No response

Anything else?

No response