Unable to Invoke Callback Service

Thanks for the confirmation! I can confirm that the client id, refresh token and the SFDC host are correct in your account settings. 

While for the domain URL, not sure it's correct or not - is your domain https://xx--xx.my.salesforce.com/ (there's a second level domain my)? It seems you didn't add the second level domain for your callback endpoint:

https://xxx--xx.salesforce.com/services/apexrest/oss/callback

Duo

HttpResponseException: status code: 503, reason phrase: 503: IOException: Unexpected response code for CONNECT: 503

I got below response in the email. Please suggest

Hi ishant.kesar,

I think you can troubleshoot from below aspects:
(1)Manually send a callback:

-Get an access token via below link:
https://login.salesforce.com/services/oauth2/token?client_id={your_client_id}&grant_type=refresh_token&refresh_token={the_refresh_token}

-Make below POST call from any HTTP client (e.g. Postman):

POST https://yourdomain.salesforce.com/services/apexrest/oss/callback

Authorization: Bearer {access_token}

Example Payload: {"@class":"com.silanis.esl.packages.event.ESLProcessEvent","name":"PACKAGE_COMPLETE","sessionUser":"0787be84-f095-44c7-ba00-787093df86fc","packageId":"KHiRfOXgKK0gpVWwwpFOSNy6o34=","message":null,"documentId":null}

-Check in Developer Console if there's an inbound call hitting your exposed REST API

(2)Double check your OAuth Registry at OneSpan Sign Callback Service

-Retrieve the OSS OAuth callback information via below API

GET /api/callback/connectors/salesforceOauth2

-Check if the callback endpoint is correct (e.g. https://yourdomain.salesforce.com/services/apexrest/oss/callback)

-Base64 decode the "key" and check if you have provided the correct host, client id and refresh token

Note: The “host” refers to either “test.salesforce.com” (SFDC sandbox) or “login.salesforce.com” (SFDC production/developer). It’s not a full URL (without “https://”) and doesn’t refer to your own domain.

(3)If these can't help you pinpoint the cause of issue, could you send a screenshot of the failure email as well as your account email to [email protected] so that I can take a closer look at the issue?

Duo

I have tried both the option but didn't worked out. Can you please look. I have sent an email to community 

Error: tunneling socket could not be established, statusCode=503

POST MAN Error

Hi ishant.kesar,

Thanks for the information, few things I noticed from your setup:
#1. Seems the refresh token has been expired or incorrect. When I use your setup to build below link (it'll return an access token with refresh token flow):

https://login.salesforce.com/services/oauth2/token?client_id={your_client_id}&grant_type=refresh_token&refresh_token={the_refresh_token}

It returned an invalid_request error which typically is caused due to wrong or expired client ID or refresh token.

<OAuth>

<error>invalid_request</error>

<error_description>must use HTTP POST</error_description>

</OAuth>

#2. You OAuth Registry at OneSpan Sign Callback Service looks like this:
 

{
  "url": "https://xxx.salesforce.com/services/apexrest/oss/callback",
  "events": [
    "DOCUMENT_SIGNED",
    "EMAIL_BOUNCE",
    "KBA_FAILURE",
    "PACKAGE_ACTIVATE",
    "PACKAGE_ARCHIVE",
    "PACKAGE_ATTACHMENT",
    "PACKAGE_COMPLETE",
    "PACKAGE_CREATE",
    "PACKAGE_DEACTIVATE",
    "PACKAGE_DECLINE",
    "PACKAGE_DELETE",
    "PACKAGE_EXPIRE",
    "PACKAGE_OPT_OUT",
    "PACKAGE_READY_FOR_COMPLETE",
    "PACKAGE_RESTORE",
    "PACKAGE_TRASH",
    "ROLE_REASSIGN",
    "SIGNER_COMPLETE",
    "SIGNER_LOCKED",
    "TEMPLATE_CREATE"
  ],
  "key" (decoded): {
  "host": "https://xxx.lightning.force.com/",
  "client_id": "3MVG9EMJF5MdlzxxxbF8oHNnFbea",
  "refresh_token": "5Aep8611pOExxxdwGpI0OCR"
}
}

Note the "key" > "host" attribute, it should be either “test.salesforce.com” (SFDC sandbox) or “login.salesforce.com” (SFDC production/developer). It’s not a full URL (without “https://”) and doesn’t refer to your own domain.

Duo

Hi Duo,

The first point - It’s a sandbox so you need to run the test.salesforce.com

for the second- I follow the exact same steps. i used the test.salesforce.com

You're pretty AWESOME. Thank you so much for helping me here!

After adding https://xx--xx.my.salesforce.com/ in the domain URL, it was working FINE

Great to hear that! And thanks for the appreciation!