improved eip712 support

[pkieltyka]

No description provided.

[pkieltyka]

import { ethers } from 'ethers'

const mnemonic = 'dose weasel clever culture letter volume endorse used harvest ripple circle install'

async function main() {
  const wallet = ethers.Wallet.fromPhrase(mnemonic)
  console.log('wallet address:', wallet.address)

  const typedData = {
    "types": {
      // "EIP712Domain": [
      //   {"name": "name", "type": "string"},
      //   {"name": "version", "type": "string"},
      //   {"name": "chainId", "type": "uint256"},
      //   {"name": "verifyingContract", "type": "address"}
      // ],
      "Person": [
        {"name": "name", "type": "string"},
        {"name": "wallet", "type": "address"},
        {"name": "count", "type": "uint8"}
      ]
    },
    "primaryType": "Person",
    "domain": {
      "name": "Ether Mail",
      "version": "1",
      "chainId": 1,
      "verifyingContract": "0xCcCCccccCCCCcCCCCCCcCcCccCcCCCcCcccccccC"
    },
    "message": {
      "name": "Bob",
      "wallet": "0xbBbBBBBbbBBBbbbBbbBbbbbBBbBbbbbBbBbbBBbB",
      "count": 4
    }
  }

  const signature = await wallet.signTypedData(typedData.domain, typedData.types, typedData.message)
  console.log('signature:', signature)

  // verify signature
  const recoveredAddress = ethers.verifyTypedData(typedData.domain, typedData.types, typedData.message, signature)
  console.log('recovered address:', recoveredAddress)
}

main()

output:

wallet address: 0xb59ba5A13f0fb106EA6094a1F69786AA69be1424
signature: 0x296c98bed8f3fd7ea96f55ca8148b4d092cbada953c8d9205b2fff759461ab4e6d6db0b78833b954684900530caeee9aaef8e42dfd8439a3fa107e910b57e2cc1b
recovered address: 0xb59ba5A13f0fb106EA6094a1F69786AA69be1424

comparison test to confirm encoding and signature compute with a ethcoder typed_data_test.go