A place for talking about the Ethereum Virtual Machine on Farcaster.

what is the most reliable way of attaching metadata to an ethereum transaction?

cases that need to be handled:
1. EOA tx
2. UserOp
3. batch call directly on smart account

calldata suffix is the first thing that comes to mind but fetching userops is potentially expensive and it requires tracing to handle (3)

There are various methods, but calldata suffix is one of the most common ways. However, for UserOps and batch calls on smart accounts, tracing and advanced analytical tools might be necessary. The specific solution depends on your project’s requirements, but using events and logs can also be helpful