Tracking Errors in User Application

[GEverding]

With the migration to solana it's become more important to be able to track specific error codes in our application. The current api for SubmitPayment only returns a simple error.

SubmitPayment(ctx context.Context, payment Payment, opts ...SolanaOption) (txHash []byte, err error)

Returning an actual error enum so it can be tracked in prometheus would be very helpful. Currently there is no list of all possible errors returned so its kind of a best effort to track errors.

[chaseeb]

i believe that list does exist in the go repository