can this library be used to implement pass callbacks

[dolphinsd]

We are looking for c# solution to implement pass callbacks like this below taken from here:
https://developers.google.com/pay/passes/guides/overview/how-to/use-callbacks

Can we use this library, if so, can you provide with an example?

private static final String PUBLIC_KEY_URL = "https://pay.google.com/gp/m/issuer/keys". // Public key URL provided by Google.
private static final String SENDER_ID = "GooglePayPasses". // Constant.

private static final String RECIPIENT_ID = "ISSUER_ID". // Replace ISSUER_ID with your issuer id.

private static final String PROTOCOL = "ECv2SigningOnly".
Private static final GooglePaymentsPublicKeysManager keysManager = new
GooglePaymentsPublicKeysManager.Builder()
.setKeysUrl(PUBLIC_KEY_URL)
.build();

public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
try {
// Extract signed message with signature from POST request body.
String signedMessage = CharStreams.toString(request.getReader());
recipient =
new PaymentMethodTokenRecipient.Builder()
.protocolVersion(PROTOCOL)
.fetchSenderVerifyingKeysWith(keysManager)
.senderId(SENDER_ID)
.recipientId(RECIPIENT_ID)
.build();

  String serializedJsonMessage = recipient.unseal(signedMessage);
  // Use serializedJsonMessage to extract the details.
} catch (Exception e) {
   // …
}

}

[andrey-davydenko]

We are looking for c# solution to implement pass callbacks like this below taken from here:
https://developers.google.com/pay/passes/guides/overview/how-to/use-callbacks

Can we use this library, if so, can you provide with an example?

private static final String PUBLIC_KEY_URL = "https://pay.google.com/gp/m/issuer/keys". // Public key URL provided by Google.
private static final String SENDER_ID = "GooglePayPasses". // Constant.

private static final String RECIPIENT_ID = "ISSUER_ID". // Replace ISSUER_ID with your issuer id.

private static final String PROTOCOL = "ECv2SigningOnly".
Private static final GooglePaymentsPublicKeysManager keysManager = new
GooglePaymentsPublicKeysManager.Builder()
.setKeysUrl(PUBLIC_KEY_URL)
.build();

public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
try {
// Extract signed message with signature from POST request body.
String signedMessage = CharStreams.toString(request.getReader());
recipient =
new PaymentMethodTokenRecipient.Builder()
.protocolVersion(PROTOCOL)
.fetchSenderVerifyingKeysWith(keysManager)
.senderId(SENDER_ID)
.recipientId(RECIPIENT_ID)
.build();

  String serializedJsonMessage = recipient.unseal(signedMessage);
  // Use serializedJsonMessage to extract the details.
} catch (Exception e) {
   // …
}

}

Did you manage to find the solution?

[shazadmaved]

Is there a solution to this?

[shazadmaved]

I have changed the implementation and included ECv2SigningOnly by changing the sender id, recipient id and public keys url. I have commented the decrypting part which not necessary for ECv2SigningOnly, and it worked.

[rahulpnath]

@shazadmaved By any chance do you have a sample uploaded anywhere? Looking to do exactly the same
Got it working after playing around with it a bit - I will raise a PR into this repo soon!