A Promise-based Node.js client for the Apple device check API. https://developer.apple.com/documentation/devicecheck/accessing_and_modifying_per-device_data

npm install device-check 

const deviceCheck = new DeviceCheck(ApiHost.DEVELOPMENT);

const key = readFileSync('key.p8').toString();

const jwt = jsonwebtoken.sign({}, key, { algorithm: 'ES256', keyid: 'AP00LNP89K', issuer: 'PJK0EZJ3I6' });

try {
    const queryResult = await deviceCheck.QueryDevice(jwt, { 
        device_token: 'aDeviceToken',
        // Optional, will be set as Date.now() if omitted
        timestamp: Date.now()
        // Optional, will be set as V4 UUID if omitted
        transaction_id: 'aTransactionId'
    });
} catch (err) {
    console.log(err);
}

const key = readFileSync('key.p8').toString();

const jwt = jsonwebtoken.sign({}, key, { algorithm: 'ES256', keyid: 'AP00LNP89K', issuer: 'PJK0EZJ3I6' });

try {
    await deviceCheck.UpdateDevice(jwt, { 
        device_token: 'aDeviceToken',
        // Optional, will be default to Date.now() if omitted
        timestamp: Date.now()
        // Optional, will be default to V4 UUID if omitted
        transaction_id: 'aTransactionId'
        bit0: true,
        bit1: false
    });
} catch (err) {
    console.log(err);
}

const key = readFileSync('key.p8').toString();

const jwt = jsonwebtoken.sign({}, key, { algorithm: 'ES256', keyid: 'AP00LNP89K', issuer: 'PJK0EZJ3I6' });

// Will throw if device token is invalid
try {
    await deviceCheck.ValidateDevice(jwt, { 
        device_token: 'aDeviceToken',
        // Optional, will be default to Date.now() if omitted
        timestamp: Date.now()
        // Optional, will be default to V4 UUID if omitted
        transaction_id: 'aTransactionId'
    });
} catch (err) {
    console.log(err);
}