[linking] Display Account Not Found error to user

[lewisdaly]

Goal:

As a PISP App's User

I want to see an error message when I enter in a username that the DFSP doesn't know about

so that I can try to find my account again with another username.

Acceptance Criteria:

• updated sequence diagram for account discovery failure scenario
• updated error codes document with necessary error code for this scenario
• end to end test: PISP receives a PUT /accounts/{id}/error callback from the DFSP

Complexity: High - lots of moving pieces here

Uncertainty: Medium

https://github.com/mojaloop/pisp/blob/master/docs/linking/README.md#12-discovery

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Tasks:

• thirdparty-api-adapter
  • implement the GET /accounts/{ID} handler
  • implement the PUT /accounts/{ID} handler
  • implement the PUT /accounts/{ID}/error handler
• thirdparty-scheme-adapter
  • inbound
    • implement the GET /accounts/{ID} handler
    • implement the PUT /accounts/{ID} handler
    • implement the PUT /accounts/{ID}/error handler
  • outbound
    • implement the GET /accounts/{fspId}/{userId} handler
    • implement the accounts model and state-machine
• mojaloop-simulator : implement GET /accounts/{ID} handler and configure rules
• TTK : define and configure accounts endpoints to support integration tests
• mojalooop/pisp:
  • add new sequence diagram for when a DFSP fails to find a user's information for the user's identifier
  • implement an end to end tests in docker-local that demonstrates this functionality

Done

• Acceptance Criteria pass
• Designs are up-to date
• Unit Tests pass
• Integration Tests pass
• Code Style & Coverage meets standards

Pull Requests:

• chore: add post authorizations to mojaloopRequests sdk-standard-components#126
• chore: add accounts callback endpoints central-ledger#822
• feat: Add accounts endpoints thirdparty-api-svc#43
• feat: Add accounts requests to thirdparty requests sdk-standard-components#132
• feat(api): add get /accounts/{ID} endpoint mojaloop-simulator#90
• chore: add accounts handler and update API def mojaloop-simulator#91
• feat: Add Inbound and Outbound accounts endpoints thirdparty-sdk#56
• chore: add request headers to accounts endpoint thirdparty-sdk#60
• chore: modify outbound accounts endpoint path thirdparty-sdk#61
• test: e2e tests for linking accounts pisp-project#125

Follow-up:

• N/A

Dependencies:

• N/A

Accountability:

• Owner: TBC
• QA/Review: TBC