Refund

{
    "id": "string",
    "request_id": "string",
    "payment_id": "string",
    "payment_request_id": "string",
    "account_id": "string",
    "payment_type": "WECHAT_PAY",
    "payment_flow": "SCAN",
    "notify_url": "string",
    "refund": {
        "amount": 0,
        "currency": "string",
        "reason": "string"
    },
    "settlement": {
        "currency": "string",
        "exchange_rate": "string"
    },
    "payer": {
        "amount": 0,
        "currency": "string"
    },
    "status": "string",
    "create_time": "string",
    "complete_time": "string"
}