Transaction

{
    "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",
    "amount": 1000,
    "type": "payment",
    "description": "Credit top-up via BTC",
    "reference_id": "solve_abc123",
    "balance_after": 5000,
    "created_at": "2024-01-20T10:00:00Z"
}