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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

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

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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

}

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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)

}