Check existing issues

• I checked there isn't already an issue for the bug I encountered.

Viem Version

2.43.1

Current Behavior

getUserOperationHash() doesn't handle properly different EIP-7702 "factory" settings.
It returns different values than the EntryPoint.getUserOperationHash(), and thus cause validation to fail.

The toPackedUserOperation should behave differently when "just packing" (for the purpose of making an ABI call) and "for signing".

• When packing it should pack the factory as-is, even if it is only 2 bytes (0x7702), not padding it to 20 bytes
• When signing it should replace factory (which is a 0x7702 with possible trailing zeros) with the current delegate (this is a mechanism that ensures a UserOp is never executed against a delegate that it wasn't explicitly signed for)

Expected Behavior

No response

Steps To Reproduce

I suggest testing the implementation of getUserOperationHash() against the values of the on-chain EntryPoint.getUserOperationHash(), to make sure they are aligned.
Unfortunately, I couldn't find a test against a contract.
e.g the tests here

Link to Minimal Reproducible Example

No response

Anything else?

No response