डेवलपर API

POST https://example.com/geneh
Geneh-Event: rate.best_changed
Geneh-Signature: t=1792118220,v1=5f2b9c1e7a

{
  "id": "evt_01JB7Q2K",
  "type": "rate.best_changed",
  "created_at": "2026-10-16T00:37:00Z",
  "data": {
    "currency": "USD",
    "side": "sell",
    "previous": { "bank": "nbe", "rate": 53.52 },
    "current": { "bank": "credit_agricole", "rate": 53.47 }
  }
}

import crypto from "node:crypto";

function verify(rawBody, header, secret) {
  const [t, v1] = header.split(",").map(p => p.split("=")[1]);
  const mac = crypto.createHmac("sha256", secret)
    .update(t + "." + rawBody).digest("hex");
  const fresh = Math.abs(Date.now() / 1000 - t) < 300;
  return fresh && crypto.timingSafeEqual(Buffer.from(mac), Buffer.from(v1));
}