{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://api.tsys.com/schemas/transaction",
  "title": "Transaction",
  "description": "A payment transaction processed through the TSYS Payment Gateway",
  "type": "object",
  "required": ["id", "merchantId", "status", "amount", "currency"],
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique transaction identifier"
    },
    "merchantId": {
      "type": "string",
      "description": "TSYS merchant identifier"
    },
    "orderId": {
      "type": "string",
      "description": "Merchant-assigned order reference number"
    },
    "status": {
      "type": "string",
      "enum": ["authorized", "captured", "settled", "voided", "refunded", "declined"],
      "description": "Current transaction status"
    },
    "amount": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Transaction amount"
    },
    "settledAmount": {
      "type": "number",
      "format": "float",
      "minimum": 0,
      "description": "Amount settled after any adjustments"
    },
    "currency": {
      "type": "string",
      "pattern": "^[A-Z]{3}$",
      "description": "ISO 4217 currency code"
    },
    "cardType": {
      "type": "string",
      "enum": ["visa", "mastercard", "amex", "discover", "debit"],
      "description": "Card network type"
    },
    "lastFour": {
      "type": "string",
      "pattern": "^[0-9]{4}$",
      "description": "Last four digits of the card number"
    },
    "authorizationCode": {
      "type": "string",
      "description": "Authorization code from the card network"
    },
    "batchId": {
      "type": "string",
      "description": "Settlement batch identifier"
    },
    "createdAt": {
      "type": "string",
      "format": "date-time",
      "description": "Transaction creation timestamp"
    },
    "settledAt": {
      "type": "string",
      "format": "date-time",
      "description": "Settlement timestamp"
    }
  }
}