Decoding Issue with Acala Extrinsic

[luckychacha]

Hi, I am attempting to decode a specific Acala extrinsic using txwrapper libraries. The decoding result is incorrect:

import {
  decode,
  getRegistry
} from '@substrate/txwrapper-polkadot';

const decodedSigned = decode("0x510284000684c0ea2f99fe4fb8461097819b90e611c2ba1a2cd48ccae732e074e1fbc03c018a50f27c630b566f4847b9dfebd0340c8317e42d44049961e5bdd8dea1cfb248d7665665125e438e8cb5793a05674b3b4e2261be87557c08421e4d9b9aae678104014d0800000a0300761837f9af59a263385ef7bb18f07295758cba4881a4599198a6ca499db0803b0fed1a0069b25f09", {
  metadataRpc,
  registry,
});
const { metadataRpc: _, ...rest } = decodedSigned;
console.log('decodedSigned:', rest);

1. Transaction Details (Expected):

• Subscan Link: https://acala.subscan.io/extrinsic/9932053-2
• Expected Extrinsic: balances.transfer_keep_alive

2. Raw Hex Input:

0x510284000684c0ea2f99fe4fb8461097819b90e611c2ba1a2cd48ccae732e074e1fbc03c018a50f27c630b566f4847b9dfebd0340c8317e42d44049961e5bdd8dea1cfb248d7665665125e438e8cb5793a05674b3b4e2261be87557c08421e4d9b9aae678104014d0800000a0300761837f9af59a263385ef7bb18f07295758cba4881a4599198a6ca499db0803b0fed1a0069b25f09

3. Observed Decoding Output (Incorrect):

decodedSigned: {
  // ... (omitted metadata/hash fields)
  method: {
    args: {
      ethAddress: '0x0684c0ea2f99fe4fb8461097819b90e611c2ba1a',
      ethSignature: '0x2cd48ccae732e074e1fbc03c0120f8486350fee3306ff8fd7a6bfad0efa6cc40f1136c1373ea8f7ef69d7b8311d6c776b80eecd5389c1507676efc9e126262c507'
    },
    name: 'claimAccount',
    pallet: 'evmAccounts'
  },
  // ...
}

[xlc]

this is a bug in https://github.com/paritytech/txwrapper-core, please report to there
what is happening is that you are decoding a signed tx, but the decode function will attempt to decode it as a signing payload first, which happens to be successful