Transactions Transaction Event Structure

{
  "$schema": "https://json-structure.org/meta/core/v0/#",
  "$id": "https://raw.githubusercontent.com/api-evangelist/affirm/refs/heads/main/json-structure/transactions-transaction-event-structure.json",
  "name": "TransactionEvent",
  "description": "Represents a single event in the lifecycle of a transaction, such as an authorization, capture, refund, or void.",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "A unique identifier for the transaction event.",
      "example": "500123"
    },
    "type": {
      "type": "string",
      "description": "The type of transaction event.",
      "enum": [
        "auth",
        "capture",
        "refund",
        "void",
        "update"
      ],
      "example": "auth"
    },
    "amount": {
      "type": "int32",
      "description": "The amount associated with this event in the smallest currency unit.",
      "example": 1
    },
    "currency": {
      "type": "string",
      "description": "The ISO 4217 currency code for this event.",
      "example": "USD"
    },
    "fee": {
      "type": "int32",
      "description": "The fee charged by Affirm for this event in the smallest currency unit.",
      "example": 1
    },
    "created": {
      "type": "datetime",
      "description": "The time when this event was created, in RFC 3339 format.",
      "example": "2025-03-15T14:30:00Z"
    },
    "reference_id": {
      "type": "string",
      "description": "An external reference identifier associated with this event.",
      "example": "500123"
    },
    "metadata": {
      "type": "object",
      "description": "Additional key-value metadata associated with this event for merchant tracking purposes.",
      "additionalProperties": {
        "type": "string"
      },
      "example": {}
    }
  }
}