Query All Refunds API
After submitting a refund request, check the refund status by calling this API. There may be a delay in refund. The refund paid by balance will be received within 20 minutes. For refunds paid by bank cards, check the refund status after 3 business days.
• This API is applicable to multiple partial refunds of the original transaction. You can view all refund details under the original transaction.
• The transaction_id in the URL refers to the value of the original WeChat Pay order No. out_trade_no refers to the original merchant order No., either of which is called.