#!/usr/bin/env bash
# High-risk. Standalone ("open") refund — credits a card with NO original
# RadiumOne transaction bounding the amount. Requires the
# transaction-refund-unreferenced scope PLUS acquirer/terminal enablement
# (see resources/support#request-enablement). Least-privilege keys only.
set -euo pipefail

API_BASE="${RADIUMONE_API_BASE:-https://api-sandbox.radiumone.io/gateway}"
: "${RADIUMONE_ACCESS_TOKEN:?set RADIUMONE_ACCESS_TOKEN to a Bearer access token with the transaction-refund-unreferenced scope}"

curl -sS -X POST "$API_BASE/v1/transactions/refund" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $RADIUMONE_ACCESS_TOKEN" \
  -d @request.json

#!/usr/bin/env python3
"""High-risk. Standalone ("open") refund — credits a card with NO original
RadiumOne transaction bounding the amount. Requires the
transaction-refund-unreferenced scope PLUS acquirer/terminal enablement (see
resources/support#request-enablement). Least-privilege keys only.
"""
import json
import os
import random
import time
from pathlib import Path

import requests

API_BASE = os.environ.get("RADIUMONE_API_BASE", "https://api-sandbox.radiumone.io/gateway")


def backoff_seconds(attempt: int) -> float:
    """Exponential backoff with jitter: attempt 1 waits ~0.25-0.5s, doubling
    each attempt, capped at 4s -- avoids hammering the gateway in a loop."""
    base = min(0.25 * 2 ** (attempt - 1), 4.0)
    return base + random.random() * base


def create_standalone_refund(max_attempts: int = 3) -> dict:
    body = json.loads((Path(__file__).parent / "request.json").read_text())
    headers = {"Authorization": f"Bearer {os.environ.get('RADIUMONE_ACCESS_TOKEN', '')}"}

    for attempt in range(1, max_attempts + 1):
        try:
            resp = requests.post(f"{API_BASE}/v1/transactions/refund", json=body, headers=headers, timeout=30)
        except requests.exceptions.Timeout:
            if attempt == max_attempts:
                raise
            time.sleep(backoff_seconds(attempt))
            continue

        if resp.status_code >= 500:
            if attempt == max_attempts:
                raise RuntimeError(f"server error {resp.status_code} after {attempt} attempts")
            time.sleep(backoff_seconds(attempt))
            continue

        payload = resp.json()
        if not resp.ok:
            # 403 auth:insufficient-scope, or a routing 409/422 if not yet enabled.
            code = payload.get("type") or payload.get("code")
            raise RuntimeError(f"open refund failed: {code} ({resp.status_code})")
        return payload

    raise RuntimeError("unreachable")


if __name__ == "__main__":
    print(json.dumps(create_standalone_refund(), indent=2))

{
  "status": "ok",
  "request_id": "req_credit1006rf1",
  "data": {
    "id": "8293104c-5d26-4e85-f192-031425364758",
    "request_id": "credit-1006-refund-1",
    "type": "REFUND",
    "status": "CAPTURED",
    "amount": 5000,
    "currency": "SGD",
    "payment_method_type": "card",
    "order_reference": "CREDIT-1006",
    "response_code": "00",
    "parent_transaction_id": null,
    "switch_request_id": "sw-credit-1006-refund-1",
    "created_at": "2026-09-14T11:10:00.000Z",
    "updated_at": "2026-09-14T11:10:01.000Z"
  }
}

{
  "type": "<string>",
  "title": "<string>",
  "status": 123,
  "detail": "<string>",
  "instance": "<string>",
  "request_id": "<string>",
  "code": "<string>",
  "retry_allowed": true,
  "errors": [
    {
      "pointer": "<string>",
      "parameter": "<string>",
      "code": "<string>",
      "detail": "<string>"
    }
  ]
}

{
  "detail": "Missing or invalid Bearer token.",
  "status": 401,
  "title": "Authentication Required",
  "type": "urn:radiumone:gateway:authentication-required"
}

{
  "detail": "Insufficient permissions for this operation.",
  "status": 403,
  "title": "Permission Denied",
  "type": "urn:radiumone:gateway:permission-denied"
}

{
  "detail": "The requested resource does not exist.",
  "status": 404,
  "title": "Not Found",
  "type": "urn:radiumone:gateway:not-found"
}

{
  "detail": "A resource with that identifier already exists.",
  "status": 409,
  "title": "Conflict",
  "type": "urn:radiumone:gateway:conflict"
}

{
  "detail": "The payment token has expired or its card data is no longer available.",
  "status": 410,
  "title": "Gone",
  "type": "urn:radiumone:gateway:gone"
}

{
  "type": "urn:radiumone:device:operation-not-supported",
  "title": "Operation Not Supported For Device",
  "status": 422,
  "detail": "Pinned/selected device has the requested operation disabled (per-device toggle)."
}

{
  "detail": "An unexpected error occurred.",
  "status": 500,
  "title": "Internal Server Error",
  "type": "urn:radiumone:gateway:internal-server-error"
}

{
  "detail": "A downstream dependency is unavailable or did not respond in time.",
  "status": 503,
  "title": "Service Unavailable",
  "type": "urn:radiumone:gateway:service-unavailable"
}