{ "epochTimestamp": 1755169981033, "expiresAt": 1755173581033, "merchantSessionIdentifier": "SSH4ADF1D97A60B47FC8537037BE9892237_FF777A9CB5E9EDAB38A01E4EDF71CB5572F19153853DAC70ADC5AA3E75877CB4", "nonce": "b6f1e016", "merchantIdentifier": "7C52E6BFA112124092008236BE1EE49791E4E82E9082AD9AC98D55B03A088120", "domainName": "1960-ikffk.checkout.trypeppr.com", "displayName": "peppr", "signature": 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"operationalAnalyticsIdentifier": "peppr:7C52E6BFA112124092008236BE1EE49791E4E82E9082AD9AC98D55B03A088120", "retries": 0, "pspId": "7C52E6BFA112124092008236BE1EE49791E4E82E9082AD9AC98D55B03A088120" } This is generated in the onvalidatemerchant event handler, and passed into session.completeMerchantValidation.
Using a sandbox account with linked cards, the next thing that happens is a "payment not completed" message in the ApplePay popup on the page, and the oncancel event is hit Inspecting the event, I don't see anything that hints at the issue. There is a sessionError object, but its code is "unknown" and the info object is empty.