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Manage WeChat Pay payment

Manage WeChat payments

After the successful charge transaction, you can perform additional operations on the payment resource. Some of the important ones are described in the following section.

For a full reference of managing payments, go to relevant server-side integration documentation page: Manage API resources (direct API calls), Manage API resources (PHP SDK), or Manage API resources (Java SDK).

Cancel after payment (refund)

You can refund up to the amount of the received payment. To do this, you have to make a cancel transaction for an existing charge transaction.


  "amount" : "20.00",
  "paymentReference": "Test cancel transaction"
$unzer = new Unzer('s-priv-xxxxxxxxxx');
$charge = $unzer->fetchChargeById('s-pay-1', 's-chg-1');
$cancel = $charge->cancel();
Unzer unzer = new Unzer("s-priv-xxxxxxxxxx");
Cancel cancel = unzer.cancelCharge("s-pay-1", "s-chg-1");

The response looks similar to the following example:

  "id": "s-cnl-1",
  "isSuccess": true,
  "isPending": false,
  "isError": false,
  "message": {
    "code": "COR.000.100.112",
    "merchant": "Request successfully processed in 'Merchant in Connector Test Mode'",
    "customer": "Your payments have been successfully processed in sandbox mode."
  "amount": "20.0000",
  "currency": "EUR",
  "date": "2021-06-04 10:32:50",
  "resources": {
    "customerId": "",
    "paymentId": "s-pay-172782",
    "basketId": "",
    "metadataId": "",
    "payPageId": "",
    "traceId": "b1b01f0559bb6ba251066c128be31d3d",
    "typeId": "s-ppl-gyzjhnacdgqe"
  "paymentReference": "Test cancel transaction",
  "processing": {
    "uniqueId": "31HA07BC8198C2F9107E689737A69227",
    "shortId": "4867.2916.5327",
    "traceId": "b1b01f0559bb6ba251066c128be31d3d"