Webhooks

কিছু ঘটলে Tenka আপনার সিস্টেমকে জানায়।

সেটিংস › Webhooks-এ একটি গোপন কোডসহ URL নিবন্ধন করুন: প্রতিটি ডেলিভারি X-Tenka-Signature-এ স্বাক্ষরিত (বডির HMAC-SHA256) এবং আপনার সিস্টেম 2xx না দিলে পুনরায় পাঠানো হয়। ইভেন্টগুলো:

Os eventos

Nome	Descrição
`fatura.paga`	চালান পরিশোধিত (আদায় নিশ্চিত)
`proposta.aceita`	বাণিজ্যিক প্রস্তাব গৃহীত (গ্রাহক দ্বারা)
`negocio.ganho`	চুক্তি জয় → চুক্তিপত্র তৈরি
`demanda.criada`	চাহিদা (টিকিট) তৈরি
`lead.criado`	CRM-এ নতুন লিড
`remessa.criada`	Remessa de rolos aberta para o beneficiador (API)
`apontamento.criado`	Apontamento de produção lançado (API)

Cabeçalhos de cada entrega

Cabeçalho	Descrição
`X-Tenka-Event`	O evento (um dos da lista acima).
`X-Tenka-Delivery`	Identificador único da entrega: use para não processar duas vezes.
`X-Tenka-Signature`	sha256= seguido do HMAC-SHA256, em hexadecimal, do corpo cru com o segredo da inscrição.
`X-Tenka-Event-Version`	Opcional: versão do contrato do corpo do evento.
`X-Tenka-Replay-Of`	Opcional: presente só quando a entrega é um reenvio; traz o id da entrega original.

Como conferir a assinatura

Calcule o HMAC-SHA256 do corpo exatamente como chegou (antes de converter para objeto), com o segredo whsec_ da inscrição, e compare com o cabeçalho em tempo constante. Não bateu: responda 401 e descarte.

Node (SDK)

import crypto from "node:crypto";

// raw = the request body exactly as received (Buffer)
function signatureOk(raw, header, secret) {
  const expected = "sha256=" + crypto.createHmac("sha256", secret).update(raw).digest("hex");
  return typeof header === "string" && header.length === expected.length
    && crypto.timingSafeEqual(Buffer.from(header), Buffer.from(expected));
}

Python

import hashlib
import hmac

def signature_ok(raw: bytes, header: str, secret: str) -> bool:
    expected = "sha256=" + hmac.new(secret.encode(), raw, hashlib.sha256).hexdigest()
    return hmac.compare_digest(expected, header or "")

Java

import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.util.HexFormat;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

static boolean signatureOk(byte[] raw, String header, String secret) throws Exception {
    Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA256"));
    String expected = "sha256=" + HexFormat.of().formatHex(mac.doFinal(raw));
    return header != null && MessageDigest.isEqual(expected.getBytes(StandardCharsets.UTF_8), header.getBytes(StandardCharsets.UTF_8));
}

using System.Security.Cryptography;
using System.Text;

static bool SignatureOk(byte[] raw, string header, string secret)
{
    using var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(secret));
    var expected = "sha256=" + Convert.ToHexString(hmac.ComputeHash(raw)).ToLowerInvariant();
    return header != null && CryptographicOperations.FixedTimeEquals(Encoding.UTF8.GetBytes(expected), Encoding.UTF8.GetBytes(header));
}

PHP

<?php
$raw = file_get_contents("php://input");
$expected = "sha256=" . hash_hmac("sha256", $raw, getenv("TENKA_WEBHOOK_SECRET"));
if (!hash_equals($expected, $_SERVER["HTTP_X_TENKA_SIGNATURE"] ?? "")) {
    http_response_code(401);
    exit;
}
http_response_code(200);

Responda 2xx em poucos segundos e processe depois; sem 2xx, a entrega é tentada de novo.