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Add support for ERC-6492 #153

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Add support for ERC-6492 #153

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22 changes: 12 additions & 10 deletions packages/siwe/lib/utils.ts
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Original file line number Diff line number Diff line change
@@ -1,9 +1,8 @@
import { randomStringForEntropy } from '@stablelib/random';
import { Contract, providers, Signer, utils } from 'ethers';
import { providers, Signer } from 'ethers';
import { verifyMessage } from '@ambire/signature-validator';
import type { SiweMessage } from './client';

const EIP1271_ABI = ["function isValidSignature(bytes32 _message, bytes _signature) public view returns (bytes4)"];
const EIP1271_MAGICVALUE = "0x1626ba7e";
const ISO8601 = /^(?<date>[0-9]{4}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01]))[Tt]([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9]|60)(.[0-9]+)?(([Zz])|([+|-]([01][0-9]|2[0-3]):[0-5][0-9]))$/;

/**
Expand All @@ -22,13 +21,16 @@ export const checkContractWalletSignature = async (
return false;
}

const walletContract = new Contract(message.address, EIP1271_ABI, provider);
const hashMessage = utils.hashMessage(message.prepareMessage());
const res = await walletContract.isValidSignature(
hashMessage,
signature
);
return res == EIP1271_MAGICVALUE;
if (provider instanceof Signer) {
provider = provider.provider;
}

return await verifyMessage({
signer: message.address,
message: message.prepareMessage(),
signature: signature,
provider: provider,
});
};

/**
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