public virtual async Task HandleEventAsync(WeChatPayRefundEto eventData)
{
// Todo: Handle errors and rollback
using (_currentTenant.Change(eventData.TenantId))
{
var payment = await _paymentRepository.GetAsync(eventData.PaymentId);
var paymentRecord = await _paymentRecordRepository.GetByPaymentId(eventData.PaymentId);
var refundRecordId = _guidGenerator.Create();
var dict = await RequestWeChatPayRefundAsync(payment, paymentRecord, eventData, refundRecordId.ToString());
var externalTradingCode = dict.GetOrDefault("refund_id");
eventData.Refund.SetExternalTradingCode(externalTradingCode);
await _refundRepository.UpdateAsync(eventData.Refund, true);
if (dict.GetOrDefault("result_code") != "SUCCESS")
{
await _paymentManager.RollbackRefundAsync(payment, eventData.Refund);
}
}
}
private async Task <Dictionary <string, string> > RequestWeChatPayRefundAsync(Payment payment, PaymentRecord paymentRecord, WeChatPayRefundEto eventData, string outRefundNo)
{
var refundAmount = eventData.Refund.RefundAmount;
var result = await _serviceProviderPayService.RefundAsync(
appId : payment.GetProperty <string>("appid"),
mchId : payment.PayeeAccount,
subAppId : null,
subMchId : null,
transactionId : paymentRecord.TransactionId,
outTradeNo : payment.Id.ToString("N"),
outRefundNo : outRefundNo,
totalFee : paymentRecord.TotalFee,
refundFee : _weChatPayFeeConverter.ConvertToWeChatPayFee(refundAmount),
refundFeeType : null,
refundDesc : eventData.Refund.DisplayReason,
refundAccount : null,
notifyUrl : null
);
var dict = new Dictionary <string, string>(result.SelectSingleNode("xml").ToDictionary() ?? throw new NullReferenceException());
if (dict.GetOrDefault("return_code") != "SUCCESS")
{
throw new RefundFailedException(dict.GetOrDefault("return_code"), dict.GetOrDefault("return_msg"));
}
await CreateWeChatPayRefundRecordEntitiesAsync(payment, dict);
return(dict);
}