EVM TX ID Calculation

[lmcmz]

Description

Currently, the Flow Wallet requires users to wait until the next transaction is sealed before returning the EVM transaction ID. This creates a poor user experience due to the long wait times. To address this, we need to pre-calculate the EVM transaction ID and return it to the user without waiting for the transaction to be executed or sealed.

This involves:

1. Fetching the nonce of the COA (Cadence Owned Account).
2. RLP encoding the transaction and using keccak256 to calculate the hash.
3. Returning the pre-calculated transaction ID to the EVM dApp immediately.

Detail:
https://app.gitbook.com/o/btnrCjBfFA1CijnAHf9d/s/GYDJkmOw0mtLZ0sqTZ8o/ep.04.02-calculate-tx-id

[Peppermint1020]

Tested successes on https://github.com/Outblock/FRW-Extension/actions/runs/12685068713

The EVM tx id pre-calculated and return it to the user without waiting for the transaction to be executed or sealed.
The process video is attached.

Screen.Recording.2025-01-14.at.12.48.50.pm.mov