More userfriendly error handling

[gr0kchain]

Would like to see us implement a friendly error handling message map which providers better messages.

Example : non-final txid => "You still require some confirmations before you can do a refund"

[monokh]

Pre req is for someone to sit there and map all these error messages into meaningful things. This should be done overall rather than on case by case basis for the maximum efficiency in dealing with this.

All errors come from CAL, and messages need to account for the difference in chains, hence I believe most of these should be implemented at CAL level.

[gr0kchain]

Agreed. I have left this unassigned as it is an enhancement request which we shelve for the next release. For now bugs are what we focus on