Support current merged EIP-712 specification

[leroldary]

ethereum/EIPs#712 is merged. When/How do you plan to update from your current implementation of
eth_signTypedData to the new one specified in EIP-712?

[vikmeup]

@hewigovens can you take a look to see what we need to finish?

[leroldary]

Metamask will add a deprecation warning to the old implementation in the next release MetaMask/metamask-extension#4905 and in the next release thereafter replace it with the current new EIP712 specification MetaMask/metamask-extension#4803.

Would be great if you could update your implementation to remain compatible with metamask.

[hewigovens]

Thanks for your information, we will work on this soon

[leroldary]

Just noticed, trust wallet for android has an EIP-712 implementation. But it seems it's neither compatible with the new merged EIP-712 specification nor with the old one implemented in MetaMask (which will be replaced soon). Which version of the specification is currently implemented for the android version?

[hewigovens]

@leroldary Thanks, we have a branch if you'd like to track the progress.