Better EIP-7702 ergonomics

[manuelmauro]

Description

Using a Option<H160> for the authorization address allows to send a None value when the signature (r, s, y_parity) is invalid and the authorization needs to be skipped as described in step 3 of EIP-7702.

[RomarQ]

Not sure it matches with the following description. Will try to have a better look a it later today

If any step above fails, immediately stop processing the tuple and continue to the next tuple in the list. When multiple tuples from the same authority are present, set the code using the address in the last valid occurrence.

[sorpaas]

Looks right. It's also just equivalent if we just remove the item from authorization_list if signature verification fails.

[RomarQ]

Ye, I think it is better to skip the item when building the authorization_list if the signature is invalid, since this check will be redundant

[manuelmauro]

Looks right. It's also just equivalent if we just remove the item from authorization_list if signature verification fails.

You're both right, that would be equivalent. However, removing items at the frontier level (in our case) would miscalculate gas costs, and filtering within evm still requires iteration.

I think the current approach is as efficient and better follows EIP-7702 specs given these constraints.