curl --request POST \
  --url 'https://api.stateset.com/api/v1/payments/{id}/refund' \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "amount": "string",
  "notes": null,
  "reason": null
}'

{
  "amount": "string",
  "amount_refunded": "string",
  "created_at": "2026-07-24T12:00:00Z",
  "currency": "string",
  "customer_id": null,
  "external_id": null,
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "order_id": null,
  "payment_method": "string",
  "payment_number": "string",
  "processor": null,
  "status": "string",
  "updated_at": "2026-07-24T12:00:00Z"
}