Standardize Open Payment errors

[mkurapov]

We should standardize errors that get thrown in the Open Payments API, so we can return proper error codes and messages in the API response.

Potentially, we could do something like:

class OpenPaymentsError extends Error { 
    constructor(message: string, status: number) {
      super(`Open Payments API error: ${message}`);
      this.name = 'OpenPaymentsError';
      this.status = status
    }
}


throw new OpenPaymentsError('Could not get Incoming Payment', 404); // usage

and then use a middleware to properly format those errors when thrown in the Open Payment routes.
This will also help standardize usage for the Open Payments client: https://github.com/interledger/open-payments/tree/main/packages/open-payments

[anurag629]

@sabineschaller Please assign this to me.

[Jacintomuambumba]

Can you assign this issue to me so I can work on it?

[mkurapov]

Hey @anurag629 & @Jacintomuambumba, did you end up starting on this issue?

[Jacintomuambumba]

Iám working

[mkurapov]

Reopening while I add additional related PRs