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VerifyMessage in server-side

This scenario mainly explains how the server-side verify the result of the signMessage. Fields verification can also be implemented using mina-signer. Only signMessage examples are provided here.
The features is implemented through mina-signer.
mina-signer is the NodeJS SDK provided by Mina Protocol for sign, verify signatures, etc.

Verify Message

  1. 1.
    Add mina-signer to package.json.
"dependencies": {
"mina-signer": "2.1.1"
}
  1. 2.
    Import and init mina-signer.
var Client = require("mina-signer");
// type Network = 'mainnet' | 'testnet'
var signerClient = new Client({ network: "mainnet" });
There are two types of initialization supported here. The main network type is mainnet, and the type of other network are testnet. See original definition.
  1. 3.
    Implement code.
const publicKey = 'B62qj6z7oseWTr37SQTn53mF8ebHn45cmSfRC58Sy52wG6KcaPZNWjw'
const verifyMessage = `Click "Sign" to sign in. No password needed!
This request will not trigger a blockchain transaction or cost any gas fees.
I accept the Auro Test zkApp Terms of Service: https://test-zkapp.aurowallet.com
address: B62qj6z7oseWTr37SQTn53mF8ebHn45cmSfRC58Sy52wG6KcaPZNWjw
iat: 1701069403643`;
const signature = {
field: '25087624681052481871246375076085075176624243458008290192358519021588472251513',
scalar: '17285357755862735391605884635523872951699156489623612197745807470058903167470'
}
const verifyBody = {
data: verifyMessage, // Signature content that needs to be verified.
publicKey: publicKey, // Public key that needs to be verified.
signature: signature, // Signature results that need to be verified.
};
// When verifyResult is true, the verification is successful.
const verifyResult = signerClient.verifyMessage(verifyBody);
This is an example of server-side verification of signature. You can refer to the implementation or run it locally.