@etherspot/eip1271-verification-util

EIP1271 Module

A simple library to validate EIP1271 signatures.

Usage

Simple usage

import ethers from "ethers";
import {
  isValidEip1271Signature,
  isValidEip1271SignatureForAllNetworks,
} from "@etherspot/eip1271-verification-util";
import { MNEMONIC, RPC } from "./constants";

const checkSig = async () => {
  const signer = ethers.Wallet.fromMnemonic(MNEMONIC);
  const data = "0x123456";

  const rpcUrls = [RPC.polygon, RPC.bsc, RPC.xdai]; // Array of RPC URLs to create providers to perform smart contract wallet validation with EIP 1271
  const walletAddress = signer.address; // The signer address to verify the signature against
  const signature = await signer.signMessage(ethers.utils.arrayify(hexxed)); // The signature to verify as a hex string
  const hash = ethers.utils.hashMessage(ethers.utils.arrayify(hexxed)); // Hashed data used for the signature to verify. The dApp will need to pre-compute this as no hashing will occur in the function, and this will be directly used in isValidEip1271Signature

  const isValidSig = await isValidEip1271Signature(
    rpcUrls,
    walletAddress,
    hash,
    signature
  );

  console.log("is signature valid:", isValidSig); // Returns a single boolean

  const isValidSigPerNetwork = await isValidEip1271SignatureForAllNetworks(
    rpcUrls,
    walletAddress,
    hash,
    signature
  );

  console.log("is signature valid for each network:", isValidSigPerNetwork); // Returns an array of booleans with chainId for each network you provided a RPC URL for eg. [{ chainId: 1, name: "mainnet", valid: true }, { chainId: 56, name: "bnb", valid: false }, ...]
};