Go-ethereum 解析ethersjs中产生的签名信息思路详解

      import { ethers } from 'ethers'; // 导入ethers package
       const provider = new ethers.providers.Web3Provider(window.ethereum);
       console.log(provider) // 获取provider,也就是rpc服务
      // 请求访问钱包
       await provider.send("eth_requestAccounts", []) 

       const signer = provider.getSigner(); //获取签名者信息
       this.userPk = await signer.getAddress(); // 获取签名者公钥
       console.log(this.userPk)
       let signature = await signer.signMessage("登录网站") // metamask 对“登录网站进行签名”
       this.loginWithWeb3(this.userPk) // 其他业务模块
       console.log(signature) // 打印签名

  console.log("verifyMessage:",ethers.utils.verifyMessage("登录网站" , signature))

func VerifyMessage(ctx context.Context, message string, signedMessage string) (string, error) {
    // Hash the unsigned message using EIP-191
    hashedMessage := []byte("\x19Ethereum Signed Message:\n" + strconv.Itoa(len(message)) + message)
    hash := crypto.Keccak256Hash(hashedMessage)

    // Get the bytes of the signed message
    decodedMessage := hexutil.MustDecode(signedMessage)

    // Handles cases where EIP-115 is not implemented (most wallets don't implement it)
    if decodedMessage[64] == 27 || decodedMessage[64] == 28 {
        decodedMessage[64] -= 27
    }

    // Recover a public key from the signed message
    sigPublicKeyECDSA, err := crypto.SigToPub(hash.Bytes(), decodedMessage)
    if sigPublicKeyECDSA == nil {
        err = errors.New("Could not get a public get from the message signature")
    }
    if err != nil {
        return "", err
    }

    return crypto.PubkeyToAddress(*sigPublicKeyECDSA).String(), nil
}

func TestVerifySignature(t *testing.T) {
	var signature Signature
	initdata := "登录网站"
	sign := "0x5321f24a057500605f1d894c2be7cb7f196ba2444e8f6815af261efbcb9d272f70d327f146553c3d51cf1816823dba6254d5500a69b4197e9f4839e0971cf89d1b"
	publicKey := "0x0bDCC0C6eAc88439fb57b90977714b7430c3c623"

	publicKey2, err := signature.VerifyMessage(context.Background(), initdata, sign)
	fmt.Println(publicKey == publicKey2, err)
}