JavaScript / Node.js

import crypto from 'crypto';
import axios from 'axios';
import { randomUUID } from 'crypto';

const API_KEY = 'zd_84444a6e...';
const SECRET = '073CuVWk...';
const BASE_URL = 'https://api.zetariumdex.com';

function sign(secret, queryString) {
  return crypto.createHmac('sha256', secret).update(queryString).digest('hex');
}

async function signedRequest(method, path, { params = {}, body } = {}) {
  const all = { ...params, timestamp: Date.now() };
  const sortedKeys = Object.keys(all).sort();
  const queryString = sortedKeys
    .map((k) => `${encodeURIComponent(k)}=${encodeURIComponent(all[k])}`)
    .join('&');
  const signature = sign(SECRET, queryString);
  const url = `${BASE_URL}${path}?${queryString}&signature=${signature}`;
  const headers = { 'X-API-KEY': API_KEY };
  if (body) headers['Content-Type'] = 'application/json';
  return axios({ method, url, headers, data: body });
}

// 1. Read futures balance
const bal = await signedRequest('GET', '/v2/futures/balance');
console.log(bal.data);

// 2. Idempotent LIMIT BUY
const clientOrderId = randomUUID();
const order = await signedRequest('POST', '/v2/orders', {
  body: {
    symbol: 'BTCUSDT',
    side: 'BUY',
    type: 'LIMIT',
    quantity: '0.001',
    price: '30000',
    clientOrderId,
  },
});
console.log(order.data);

import WebSocket from 'ws';

const ws = new WebSocket('wss://api.zetariumdex.com/ws');

ws.on('open', () => {
  ws.send(
    JSON.stringify({
      action: 'subscribe',
      channel: 'ticker',
      symbol: 'BTCUSDT',
    }),
  );
});

ws.on('message', (data) => {
  const msg = JSON.parse(data);
  if (msg.channel === 'ticker') {
    console.log(`${msg.symbol} last=${msg.data.lastPrice}`);
  }
});