Need to sign Eip712 Typed data from the json string

[awaiskhan1304]

In the wallet connect request I am receiving eth_signTypedData_v4 with the json string needed to be signed. I want to sign this message. In the example project under Signer->EthSigner.swift their is one method signTypedData but it is returning dummy sigature.

[muratogat]

Yes, it seems that WC devs are not bothered with implementing signTypedData properly, so they simply return a dummy signature instead.
Maybe this helps https://stackoverflow.com/questions/71215667/how-to-implement-eth-signtypeddata-in-swift

[awaiskhan1304]

I have tried this and able to create the signature but there is something wrong with the signature. When I verify the signature on web using web3.eth.accounts.recover(message,sig) method it verifies the message and gives me correct result while when I use the method which wallet connect test dapp uses it fails to verify the signature.

function recoverAddress(sig, hash) {
const params = ethUtil.fromRpcSig(sig);
const result = ethUtil.ecrecover(
ethUtil.toBuffer(hash),
params.v,
params.r,
params.s
);
const signer = ethUtil.bufferToHex(ethUtil.publicToAddress(result));
return signer;
}

Not getting why this is happening

[muratogat]

The signature sent back over wallet connect to the dapp needs to start with 0x.

[awaiskhan1304]

yes sending it back with 0x.