{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api.syf.com/schemas/transaction",
  "title": "Transaction",
  "description": "A Synchrony Financial credit transaction including purchases, payments, refunds, and reversals.",
  "type": "object",
  "properties": {
    "transactionId": {
      "type": "string",
      "description": "Unique identifier for the transaction."
    },
    "authorizationCode": {
      "type": "string",
      "description": "Authorization code returned on approval."
    },
    "status": {
      "type": "string",
      "enum": ["approved", "declined", "pending", "reversed"],
      "description": "Current transaction status."
    },
    "type": {
      "type": "string",
      "enum": ["purchase", "preauthorization", "completion", "payment", "refund", "reversal"],
      "description": "Transaction type."
    },
    "amount": {
      "type": "number",
      "format": "double",
      "minimum": 0,
      "description": "Transaction amount in USD."
    },
    "merchantId": {
      "type": "string",
      "description": "Synchrony merchant identifier."
    },
    "accountNumber": {
      "type": "string",
      "description": "Masked credit account number."
    },
    "channel": {
      "type": "string",
      "enum": ["web", "mobile", "pos"],
      "description": "Transaction channel."
    },
    "merchantOrderId": {
      "type": "string",
      "description": "Merchant internal order reference."
    },
    "timestamp": {
      "type": "string",
      "format": "date-time",
      "description": "Transaction timestamp in ISO 8601 format."
    },
    "message": {
      "type": "string",
      "description": "Human-readable status message."
    }
  },
  "required": ["transactionId", "status", "type", "amount", "merchantId", "timestamp"]
}