{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://api-evangelist.github.io/regions-financial/json-schema/regions-account-schema.json",
  "title": "Account",
  "description": "A Regions Bank customer account (FDX-compliant)",
  "type": "object",
  "required": ["accountId", "accountType", "status"],
  "properties": {
    "accountId": {
      "type": "string",
      "description": "Unique account identifier"
    },
    "accountType": {
      "type": "string",
      "enum": ["CHECKING", "SAVINGS", "CREDIT_CARD", "LOAN", "INVESTMENT", "MORTGAGE"],
      "description": "FDX account type classification"
    },
    "accountNumber": {
      "type": "string",
      "description": "Masked account number (last 4 digits visible)"
    },
    "nickname": {
      "type": "string",
      "description": "Customer-assigned account nickname"
    },
    "status": {
      "type": "string",
      "enum": ["OPEN", "CLOSED"],
      "description": "Account status"
    },
    "currency": {
      "type": "string",
      "default": "USD",
      "description": "Account currency code (ISO 4217)"
    },
    "balance": {
      "type": "object",
      "properties": {
        "available": { "type": "number", "description": "Available balance" },
        "current": { "type": "number", "description": "Current ledger balance" },
        "limit": { "type": "number", "description": "Credit limit for credit accounts" },
        "currency": { "type": "string", "default": "USD" },
        "asOf": { "type": "string", "format": "date-time" }
      }
    },
    "institution": {
      "type": "string",
      "description": "Institution name (Regions Bank)"
    }
  },
  "additionalProperties": false
}