TaobaoClient client = new DefaultTaobaoClient(url, appkey, secret);
MiniappTradeOrderRefundRequest req = new MiniappTradeOrderRefundRequest();
MiniappTradeOrderRefundRequest.RefundDTO obj1 = new MiniappTradeOrderRefundRequest.RefundDTO();
obj1.setOutRequestNo("1345223ddd");
obj1.setMiniappId(123455L);
obj1.setSubOrderId(34455667L);
obj1.setOrderId(33577899L);
obj1.setRefundReason("退款说明");
obj1.setOutOrderId("外部订单id");
obj1.setRefundPrice(2L);
req.setRefundDto(obj1);
MiniappTradeOrderRefundResponse rsp = client.execute(req);
System.out.println(rsp.getBody());

ITopClient client = new DefaultTopClient(url, appkey, secret);
MiniappTradeOrderRefundRequest req = new MiniappTradeOrderRefundRequest();
MiniappTradeOrderRefundRequest.RefundDTODomain obj1 = new MiniappTradeOrderRefundRequest.RefundDTODomain();
obj1.OutRequestNo = "1345223ddd";
obj1.MiniappId = 123455L;
obj1.SubOrderId = 34455667L;
obj1.OrderId = 33577899L;
obj1.RefundReason = "退款说明";
obj1.OutOrderId = "外部订单id";
obj1.RefundPrice = 2L;
req.RefundDto_ = obj1;
MiniappTradeOrderRefundResponse rsp = client.Execute(req);
Console.WriteLine(rsp.Body);

$c = new TopClient;
$c->appkey = $appkey;
$c->secretKey = $secret;
$req = new MiniappTradeOrderRefundRequest;
$refund_dto = new RefundDTO;
$refund_dto->out_request_no="1345223ddd";
$refund_dto->miniapp_id="123455";
$refund_dto->sub_order_id="34455667";
$refund_dto->order_id="33577899";
$refund_dto->refund_reason="退款说明";
$refund_dto->out_order_id="外部订单id";
$refund_dto->refund_price="2";
$req->setRefundDto(json_encode($refund_dto));
$resp = $c->execute($req);

curl -X POST 'http://gw.api.taobao.com/router/rest' \
-H 'Content-Type:application/x-www-form-urlencoded;charset=utf-8' \
-d 'app_key=12129701' \
-d 'format=json' \
-d 'method=taobao.miniapp.trade.order.refund' \
-d 'partner_id=apidoc' \
-d 'sign=7D89FB6E6F18D78E3C4DA4F0B5327C06' \
-d 'sign_method=hmac' \
-d 'timestamp=2025-05-03+22%3A59%3A46' \
-d 'v=2.0' \
-d 'refund_dto=null'

# -*- coding: utf-8 -*-
import top.api

req=top.api.MiniappTradeOrderRefundRequest(url,port)
req.set_app_info(top.appinfo(appkey,secret))

req.refund_dto="数据结构示例JSON格式"
try:
	resp= req.getResponse()
	print(resp)
except Exception,e:
	print(e)

pTopRequest pRequest = alloc_top_request();
pTopResponse pResponse = NULL;
pTaobaoClient pClient = alloc_taobao_client(url, appkey, appsecret);
set_api_name(pRequest,"taobao.miniapp.trade.order.refund");
add_param(pRequest,"refund_dto","数据结构JSON示例");
pResponse = top_execute(pClient,pRequest,NULL);
printf("ret code:%d\n",pResponse->code);
if(pResponse->code == 0){
	pTopResponseIterator ite = init_response_iterator(pResponse);
	pResultItem pResultItem = alloc_result_item();
	while(parseNext(ite, pResultItem) == 0){
		printf("%s:%s\n",pResultItem->key,pResultItem->value);
	}
	destroy_response_iterator(ite);
	destroy_result_item(pResultItem);
}
destroy_top_request(pRequest);
destroy_top_response(pResponse);
destroy_taobao_client(pClient);

TopClient = require('./topClient').TopClient;
var client = new TopClient({
	'appkey': 'appkey',
	'appsecret': 'secret',
	'REST_URL': 'http://gw.api.taobao.com/router/rest'
});

client.execute('taobao.miniapp.trade.order.refund', {
	'refund_dto':'数据结构JSON示例'
}, function(error, response) {
	if (!error) console.log(response);
	else console.log(error);
})

<miniapp_trade_order_refund_response>
    <successful>true</successful>
    <error_type>1</error_type>
    <model>
        <out_request_no>2367938232160328571-2</out_request_no>
        <refund_start_time>2021-12-22 11:58:53</refund_start_time>
        <sub_order_id>2367938232160328700</sub_order_id>
        <order_id>2367938232158328300</order_id>
        <refund_reason>测试退款2</refund_reason>
        <out_order_id>99999911</out_order_id>
        <refund_end_time>2021-12-22 11:58:53</refund_end_time>
        <refund_price>2</refund_price>
        <open_id>2212848258020</open_id>
        <refund_id>150190742022327200</refund_id>
    </model>
    <error_msg>错误信息</error_msg>
</miniapp_trade_order_refund_response>

{
    "miniapp_trade_order_refund_response":{
        "successful":true,
        "error_type":1,
        "model":{
            "out_request_no":"2367938232160328571-2",
            "refund_start_time":"2021-12-22 11:58:53",
            "sub_order_id":2367938232160328700,
            "order_id":2367938232158328300,
            "refund_reason":"测试退款2",
            "out_order_id":"99999911",
            "refund_end_time":"2021-12-22 11:58:53",
            "refund_price":2,
            "open_id":"2212848258020",
            "refund_id":150190742022327200
        },
        "error_msg":"错误信息"
    }
}

<error_response>
    <code>50</code>
    <msg>Remote service error</msg>
    <sub_code>isv.invalid-parameter</sub_code>
    <sub_msg>非法参数</sub_msg>
</error_response>

{
	"error_response":{
		"msg":"Remote service error",
		"code":50,
		"sub_msg":"非法参数",
		"sub_code":"isv.invalid-parameter"
	}
}