PEPETA KE Measurement Protocol | confirmation deposit placed | Firebase

const firebaseAppId = '1:195791133910:android:15d07d414fec1e69807d77';
const apiSecret = 'Gi6MLUDRTE-vpahlx-sbcw';

fetch(`https://www.google-analytics.com/mp/collect?firebase_app_id=${firebaseAppId}&api_secret=${apiSecret}`, {
  method: "POST",
  headers: {
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "app_instance_id": appInstanceId,       // String: Must be retrieved from the Android SDK
    "user_id": userId,                       // String: Your internal unique user ID
    "timestamp_micros": timestampMicros,     // String: Unix epoch timestamp in microseconds
    "events": [
      {
        "name": "confirmation_deposit_placed",
        "params": {
          "session_id": sessionId,           // String: GA4 session ID from the app client
          "deposit_id": depositId,           // String: Unique identifier for the transaction
          "currency": currencyCode,           // String: 3-letter ISO 4217 code (e.g., "UGX", "USD")
          "value": depositValue              // Numeric: Double or Integer (do NOT wrap in quotes)
        }
      }
    ]
  })
})
.then(response => {
  // GA4 explicitly returns a 204 No Content on a successful payload validation
  if (response.status === 204) {
    console.log("GA4 Event successfully dispatched.");
  } else {
    console.error(`GA4 Error Status: ${response.status}`);
  }
})
.catch(error => console.error("Network error reporting to GA4:", error));