Ethsigning helps you validate signatures for both externally owned account (EOA) wallets and smart contract wallets. This includes validation support for:

• EIP-712: Typed structured data hashing and signing
• ERC-1271: Standard Signature Validation Method for Contracts
• ERC-6492: Signature Validation for Predeploy Contracts

We've also prepared a short guide on signatures; check it here if you'd like to learn more!

Installation

npm install ethsigning

or use any package manager you like!

Usage

Ethsigning package comes with 2 methods, which are

isValidMessageSignature: (
  address: string,
  message: string | Uint8Array,
  signature: string,
  provider: ethers.providers.Provider
) => Promise<boolean>

and

isValidTypedDataSignature: (
  address: string,
  typedData: TypedData,
  signature: string,
  provider: ethers.providers.Provider
) => Promise<boolean>

Example:

import { ethers } from 'ethers'
import { isValidMessageSignature } from 'ethsigning'

const provider = new ethers.providers.JsonRpcProvider('https://nodes.sequence.app/mainnet')

const isValid = await isValidMessageSignature(
  address, // Address of the signer
  message,
  signature,
  provider
)

console.log('isValid:', isValid)

Notes

• If you are validating a signature that was signed with a smart contract, make sure the provider you pass is for the network the message was signed on.

Package in action

You can try it here to see the package in action.