This design document defines new taler://
URIs to cause synthetic errors
or special states in the wallet that can then be rendered by the UI.
UIs need to handle various (error-) states and responses of wallet-core. It’s not easy to cover all of these states and responses manually. Some of them are hard to reach or simulate without an elaborate test setup.
The implementation of synthetic errors should be as separate from production code as possible, to avoid making the normal code paths unreadable.
taler://dev-experiment/$STATE_ID
taler://pay/...?dev-experiment=
http(s)://*.dev-experiment.taler.net/
(This should be filled in with results from discussions on mailing lists / personal communication.)