Handcash - general errors

[theflyingcodr]

When we were testing Payd with handcash we submitted an incorrect URL for the payment endpoint, the app just displayed a message saying "note too long" - I wonder could there be a better method of logging this - I understand they are trying to keep this as user friendly as possible but keeping it simple but perhaps something like "payment failed / payment unavailable" or something could be better here?