Error Codes

Proposal for consistent error codes across the entire lbrynet API.

Code	Name
1xx	Daemon start other CLI command Failures (non-recoverable)
10x	Meta error codes not presented by lbrynet itself but from apps trying to interact with lbrynet.
100	Cannot find the lbrynet command.
101	Permission denied trying to execute lbrynet command.
102	Executing lbrynet command does not produce any result.
103	Executing lbrynet produces a result that is not normal (eg. a segfault).
11x	Enough of lbrynet was able to start to determine external factors causing eventual startup failure.
110	Out of disk space.
111	Out of RAM.
12x	120-129 Internal factors preventing lbrynet from bootstrapping itself.
120	Incompatible version of Python.
121	Incompatible version of some library.
13x	130-139 configuration errors
130	Cannot write configuration file. (When writing the default config fails on startup, such as due to permission issues.)
131	Cannot find provided configuration file. (Can't open the config file user provided via command line args.)
132	Failed to parse the configuration file. (Includes the syntax error / line number to help user fix it.)
133	Configuration file is missing setting that has no default / fallback.
134	Configuration file has setting set to an invalid value.
14x	140-149 executing commands
140	Command does not exist.
141	Command is deprecated.
142	Invalid arguments for command.
2xx	Networking
201	Not internet connection.
202	Router does not support UPnP.
210	Failed connecting to a lbryumx server. (Should normally not need to be handled higher up as lbrynet will retry other servers.)
211	Failed connecting to all known lbryumx servers. (Will need to bubble up and require user to do something.)
212	lbryumx droppped our connection. (Maybe we were being bad?)
213	Disconnected from lbryumx server due to suspicious responses. (SPV failed to validate, etc)
214	Disconnected from lbryumx server due to unresponsiveness.
215	215-229 TBD lbryumx connectivity errors.
230	230-249 P2P / blob download errors.
250	250 - 299 TBD DHT errors.
3xx	Blockchain
300	Transaction rejected, unknown reason.
301	Transaction rejected, fees too low.
310	Not enough LBC to cover the transaction, even after all UTXOs reach 6 confirmations.
311	Not enough LBC to cover the transaction, will be enough after some more confirmations.
330	Channel signing key not found.
331	Channel signing key is out of date. (For example, channel was updated but you don't have the updated key.)
4xx	Blobs
400	Blob not found.