Paid Ads & Conversion Tracking Architecture

// Server-Side Meta Conversions API Event Dispatcher
import crypto from "crypto";

export async function trackServerConversion(eventData: {
  eventName: string;
  email?: string;
  phone?: string;
  value?: number;
  eventId: string;
}) {
  const hash = (str?: string) =>
    str ? crypto.createHash("sha256").update(str.trim().toLowerCase()).digest("hex") : undefined;

  const payload = {
    data: [
      {
        event_name: eventData.eventName,
        event_time: Math.floor(Date.now() / 1000),
        event_id: eventData.eventId,
        user_data: {
          em: hash(eventData.email),
          ph: hash(eventData.phone),
        },
        custom_data: {
          currency: "INR",
          value: eventData.value || 0,
        },
      },
    ],
  };

  return fetch(`https://graph.facebook.com/v19.0/${process.env.META_PIXEL_ID}/events?access_token=${process.env.META_CAPI_TOKEN}`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(payload),
  });
}