# VerifyMessage in server-side

{% hint style="info" %}
The features is implemented through [mina-signer](https://www.npmjs.com/package/mina-signer).

**mina-signer** is the NodeJS SDK provided by Mina Protocol for sign, verify signatures, etc.
{% endhint %}

## Verify Message

1. Add **mina-signer** to `package.json`.

```json
"dependencies": {
    "mina-signer": "2.1.1"
}
```

2. Import and init **mina-signer**.

```typescript
var Client = require("mina-signer");

// type Network = 'mainnet' | 'testnet'
var signerClient = new Client({ network: "mainnet" });
```

{% hint style="info" %}
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.](https://github.com/o1-labs/o1js/blob/main/src/mina-signer/src/TSTypes.ts#L12)
{% endhint %}

3. Implement code.

```javascript
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);
```

{% hint style="success" %}
This is an [example of server-side](https://github.com/aurowallet/mina-signer-verify-example) verification of signature. You can refer to the implementation or run it locally.
{% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.aurowallet.com/general/howto/verifymessage-in-server-side.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.