curl --request POST \
  --url 'https://api.stateset.com/api/v1/payments/{id}/refund' \
  --header "Authorization: Bearer $STATESET_API_KEY" \
  --header 'Content-Type: application/json' \
  --data '{
  "amount": "49.00",
  "notes": "Two-person tent, green — replacement for damaged pole set.",
  "reason": "Two-person tent, green — replacement for damaged pole set."
}'

{
  "amount": "49.00",
  "amount_refunded": "string",
  "created_at": "2026-08-31T14:22:05Z",
  "currency": "USD",
  "customer_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "external_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "order_id": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
  "payment_method": "card",
  "payment_number": "string",
  "processor": "stripe",
  "status": "pending",
  "updated_at": "2026-08-31T14:22:05Z"
}