curl --request GET \
  --url https://api.paystack.com/v1/transactions/{transactionId} \
  --header 'Authorization: Bearer <token>'

{
  "status": true,
  "message": "Transaction fetched successfully",
  "code": "ok",
  "data": {
    "id": "txn_01KPBG1Q3Z8X1Q6VJRE5R8ZFBG",
    "source_type": "onramp",
    "source_id": "onr_01KPBH802PXQQXT8ASJGE0QX2K",
    "customer_id": "cust_seed_alice",
    "type": "onramp",
    "status": "success",
    "metadata": {},
    "created_at": "2026-04-16T16:16:03.000Z",
    "updated_at": "2026-04-16T16:16:07.000Z",
    "reference": "INV-2026-001",
    "transaction_hash": null,
    "from_wallet_id": null,
    "to_wallet_id": "wal_seed_alice_usdc",
    "source_amount": "10000.00",
    "source_currency": "NGN",
    "destination_amount": "6.046600",
    "destination_currency": "USDC",
    "confirmed_at": "2026-04-22T02:01:30.000Z"
  },
  "meta": {
    "request_id": "req_01HXYZ4K5ABCDEFGHJKLMNPQRS",
    "timestamp": "2026-05-14T15:43:55.732Z",
    "version": "1"
  }
}