Callback Message Signature Verification Specification

The platform delivers message notifications to developers via callback. Since the order of message delivery is not guaranteed, upon receiving a message, you must first verify the actual order status via the Order Query API before proceeding with any business logic.

Message Delivery Method:

Messages are sent via POST form-data (not JSON).

Request Parameters:

Parameter	Type	Description
message	String	Message content (JSON string)
signature	String	Signature value generated using HmacSHA1

Signature Verification（Java Example）

The following example demonstrates how to generate the signature using HmacSHA1.

Java Example：

Call Example :