Epic: Digital Credentials

[rhysyngsun]

• Stand up “sign and verify” as a service to be used by xPro (PR: Added initial structure for deploying sign and verify service ol-infrastructure#19)
• Create signing keys and register as a DCC user
• Implement credential/request endpoint (PR: Add digital credentials app ol-django#14)
  • Requires OAuth authentication
  • Proxies to digitalcredentials/sign-and-verify service for the actual signing
    • API utilizes a one-time token to identify the request uniquely:
  • Token is associated with a backend record specifying which course/program the request is for
    • When the API first sees a learner DID, it associates/binds that DID to the authenticated learner
  • Subsequent requests that have a learner DID / authenticated learner mismatch will return an error (a 4xx series error)
• Implement credential schema/template (Digital Credential Template #1969)
• Design the e-mail to be sent to learners when they become eligible for digital credential
• Send the e-mail when learner becomes eligible