Callback

How to callback

Tips

• Sandbox, after you create sandbox order, click Set Callback to simulate a success callback or failure callback.
• Production, only waiting for the actual payment to happen.
• There will be callback only for orders created by API. Because the order created in the merchant platform payment link cannot be linked to the merchant system.

Callback Signature

For the callback notification, we will add the signature as follows, and you need to do the corresponding signature verification to verify whether the callback API signature is correct or not.

Tips

• X-SIGNATURE = SHA256withRSA(smilepayz_private_key, stringToSign)
• smilepayz_private_key is smilepayz rsa private key that use to generate signature,you are not required to know.
• stringToSign = tradeNo + "|" + X-TIMESTAMP
• checkSHA256withRSA refer to signature

You just need to find the corresponding Platform Public Key and verify the signature,and the value refer to Integration Info