Node.js SDK

const crypto = require('crypto');

class HDWaaSClient {
  constructor(apiKey, secretKey, baseUrl = 'https://api.2settle.io') {
    this.apiKey = apiKey;
    this.secretKey = secretKey;
    this.baseUrl = baseUrl;
  }

  // Generate HMAC signature
  sign(method, path, body = {}) {
    const timestamp = Date.now().toString();
    const bodyStr = JSON.stringify(body);
    const bodyHash = crypto.createHash('sha256').update(bodyStr).digest('hex');
    const payload = `${timestamp}|${method}|${path}|${bodyHash}`;
    const hmacKey = crypto.createHash('sha256').update(this.secretKey).digest('hex');
    const signature = crypto.createHmac('sha256', hmacKey).update(payload).digest('hex');
    return { timestamp, signature, bodyStr };
  }

  // Make authenticated request
  async request(method, path, body) {
    const { timestamp, signature, bodyStr } = this.sign(method, path, body);

    const response = await fetch(`${this.baseUrl}${path}`, {
      method,
      headers: {
        'Content-Type': 'application/json',
        'X-API-Key': this.apiKey,
        'X-Timestamp': timestamp,
        'X-Signature': signature,
      },
      body: method !== 'GET' ? bodyStr : undefined,
    });

    return response.json();
  }

  // Create a new wallet address
  async createWallet(options) {
    return this.request('POST', '/v1/wallets', {
      network: options.network,
      crypto: options.crypto,
      metadata: options.metadata,
      expiresInMinutes: options.expiresInMinutes,
    });
  }

  // Get wallet by ID
  async getWallet(walletId) {
    return this.request('GET', `/v1/wallets/${walletId}`, {});
  }

  // List wallets
  async listWallets(options = {}) {
    const params = new URLSearchParams();
    if (options.status) params.append('status', options.status);
    if (options.limit) params.append('limit', options.limit.toString());
    if (options.offset) params.append('offset', options.offset.toString());

    const query = params.toString();
    const path = `/v1/wallets${query ? '?' + query : ''}`;
    return this.request('GET', path, {});
  }
}

// Usage
const client = new HDWaaSClient('pk_your_api_key', 'sk_your_secret_key');

// Create USDT deposit address
const wallet = await client.createWallet({
  network: 'trc20',
  crypto: 'USDT',
  metadata: { orderId: 'ORD-12345' },
  expiresInMinutes: 60,
});

console.log('Deposit address:', wallet.wallet.address);

// Check deposit status
const status = await client.getWallet(wallet.wallet.id);
console.log('Status:', status.wallet.status);