Migrar do Twilio

import twilio from 'twilio';
const client = twilio(process.env.TWILIO_ACCOUNT_SID, process.env.TWILIO_AUTH_TOKEN);

await client.messages.create({
  from: 'whatsapp:+14155238886',
  to: 'whatsapp:+5511999999999',
  contentSid: 'HXabc123...',
  contentVariables: JSON.stringify({ '1': 'João', '2': 'ARA-123' }),
});

import { NodeSDK } from '@ararahq/sdk';

const sdk = new NodeSDK({ apiKey: process.env.ARARA_API_KEY! });

await sdk.messages.send(
  {
    receiver: '+5511999999999',
    templateName: 'confirmacao_pedido',
    templateVariables: ['João', 'ARA-123'],
  },
  { idempotencyKey: 'pedido-ARA-123-confirmacao' },
);

app.post('/twilio/status', (req, res) => {
  const { MessageSid, MessageStatus } = req.body;
  res.send('OK');
});

import express from 'express';
import { createHmac, timingSafeEqual } from 'node:crypto';

const TOLERANCE_SECONDS = 300;

function isValidSignature(rawBody: string, timestamp: string, signature: string, secret: string) {
  const ts = Number(timestamp);
  if (!Number.isInteger(ts) || Math.abs(Date.now() / 1000 - ts) > TOLERANCE_SECONDS) return false;
  const expected = 'sha256=' + createHmac('sha256', secret).update(`${timestamp}.${rawBody}`).digest('hex');
  const a = Buffer.from(expected);
  const b = Buffer.from(signature);
  return a.length === b.length && timingSafeEqual(a, b);
}

app.post('/arara/webhook', express.text({ type: 'application/json' }), (req, res) => {
  const rawBody = req.body as string;
  const ok = isValidSignature(
    rawBody,
    req.get('X-Arara-Timestamp') ?? '',
    req.get('X-Arara-Signature') ?? '',
    process.env.ARARA_WEBHOOK_SECRET!,
  );
  if (!ok) return res.status(401).end();

  const { event, data } = JSON.parse(rawBody);
  if (event === 'message.status_updated') {
    // data.id (ara_msg_...), data.status: queued | processing | sent | delivered | read | failed | canceled
  }
  res.status(204).end();
});

app.post('/twilio/inbound', (req, res) => {
  const { From, Body, MessageSid } = req.body;
  const phone = From.replace('whatsapp:', '');
  res.set('Content-Type', 'text/xml');
  res.send('<Response></Response>');
});

// Mesma rota do webhook acima
if (event === 'message.received') {
  const phone = data.from; // só dígitos, ex.: 5511999999999
  const text = data.body;
  // Resposta via API, dentro da janela de 24h
  await sdk.messages.send({ receiver: `+${phone}`, body: 'Obrigado!' });
}