Remove EIP-1271 specific logic from core contracts

[rmeissner]

As there is still discussion on ethereum/EIPs#1271 about the concrete implementation all specific logic for that eip should be removed from the core contracts and can be handled in the future by the registered fallback handler.

Edit: The GP team has done this for their E2E tests: https://github.com/gnosis/gp-v2-contracts/blob/21e1c31905d5eb7aef191dac229de50d8889752b/src/contracts/test/GnosisSafeERC1271Fallback.sol

[thegostep]

Do you have any guidance on ERC1271 + EIP712 compatibility while we wait for this. updated implementation?

[rmeissner]

@thegostep currently you would have to rely on the deprecated eip-1271 logic. For eip 712 there should be no change required currently.

[thegostep]

I see - my worry is that the deprecated eip-1271 is not compatible with eip-712 since eip-712 uses bytes32 message size

[thegostep]

I think for the time being I have to resolve myself not to be compatible with gnosis safe until the eip-1271 implementation is updated