Authentication

import crypto from 'crypto';
import fetch from 'node-fetch';

const API_KEY = 'YOUR_API_KEY';
const API_SECRET = 'YOUR_API_SECRET';

async function signAndRequest() {
  const method = 'POST';
  const host = 'ramp.hexarails.ai'; // or ramp-sandbox.hexarails.ai
  const path = '/payment/estimate';
  const query = ''; // e.g. 'currency=USDT&network=TRX'

  const bodyObject = {
    // your request body here
  };
  const body = JSON.stringify(bodyObject);

  const timestamp = Math.floor(Date.now() / 1000).toString();
  const nonce = crypto.randomUUID();

  const bodyHash = crypto.createHash('sha256').update(body).digest('hex');

  const canonical = [
    method.toUpperCase(),
    host,
    path,
    query,
    bodyHash,
    timestamp,
    nonce,
  ].join('\n');

  const signature = crypto
    .createHmac('sha256', API_SECRET)
    .update(canonical)
    .digest('hex');

  const url = `https://${host}${path}${query ? '?' + query : ''}`;

  const res = await fetch(url, {
    method,
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': API_KEY,
      'X-Timestamp': timestamp,
      'X-Nonce': nonce,
      'X-Signature': signature,
    },
    body,
  });

  const data = await res.json();
  console.log(data);
}

signAndRequest().catch(console.error);