Onramp webhooks

{
  "event": "onramp.completed",
  "order_id": "7c1e4f9a-...",
  "external_reference": "collect-2201",
  "status": "completed",
  "currency": "KES",
  "amount_usdc": 7.62,
  "amount_local": 1000,
  "fee": 10,
  "exchange_rate": 129.92,
  "customer_phone": "0712345678",
  "mobile_network": "Safaricom",
  "release_address": "0xyourwalletaddress0000000000000000000000",
  "receipt_number": "SHQ1234ABC",
  "completed_at": "2026-07-23T12:04:41Z",
  "created_at": "2026-07-23T12:00:03Z"
}

{
  "event": "onramp.released",
  "order_id": "7c1e4f9a-...",
  "status": "completed",
  "amount_usdc": 7.62,
  "release_address": "0xyourwalletaddress0000000000000000000000",
  "release_tx_hash": "0x55a572efe1720250e442f38741477a4fc3f7f152e5cd208cc52f8222a1c2a13b",
  "completed_at": "2026-07-23T12:04:41Z",
  "created_at": "2026-07-23T12:00:03Z"
}

{
  "event": "onramp.failed",
  "order_id": "7c1e4f9a-...",
  "external_reference": "collect-2201",
  "status": "failed",
  "currency": "KES",
  "amount_usdc": 7.62,
  "amount_local": 1000,
  "fee": 10,
  "exchange_rate": 129.92,
  "customer_phone": "0712345678",
  "mobile_network": "Safaricom",
  "release_address": "0xyourwalletaddress0000000000000000000000",
  "failure_reason": "cancelled by user",
  "created_at": "2026-07-23T12:00:03Z"
}

{
  "event": "onramp.expired",
  "order_id": "7c1e4f9a-...",
  "external_reference": "collect-2201",
  "status": "expired",
  "currency": "KES",
  "amount_usdc": 7.62,
  "amount_local": 1000,
  "customer_phone": "0712345678",
  "created_at": "2026-07-23T12:00:03Z"
}

app.post('/webhooks/minisend', (req, res) => {
  res.status(200).send('OK');

  const payload = req.body;
  if (payload.event?.startsWith('onramp.')) {
    processOnrampEvent(payload); // dedupe on payload.order_id
  } else if (payload.event?.startsWith('offramp.')) {
    processOfframpEvent(payload);
  } else {
    processCheckoutEvent(payload);
  }
});