With this PR we include the final version of the lnd v0.14.0-beta
release to ensure compatibility.
The rationale for choosing Loop version 0.15.1 instead of 0.16.0 is that
this doesn't add any major new features.
This makes two changes to handling of errors when configuration file
could not be loaded:
1. Only NotFound errors are considered OK - access errors and other FS
issues are now treated as fatal.
2. Failing to load config file specified explicitly via `--configfile`
option is alway a fatal error.
Rationale: If the configfile was specified explicitly then it indicates
the user really wishes to load it. While the user could want it to be
optionally loaded for extra configuration options, this can be
accomplished using an empty file.
If the config file was not specified explicitly then its' path was
computed from loop directory. If the file is inaccessible due to
permissions or other FS errors it's nearly certain other following
operations will fail as well. Failing early with a clear message is thus
beneficial.
This still leaves room for uncaught user error (e.g. mistakenly naming
config file inside loop dir as `loop.conf` instead of `loopd.conf`) but
it's greatly reduced and such error should be easier to identify.
(Indirectly) closes#412
The version v0.10.1-beta of lnd is quite old with v0.13.0-beta just
being published as RC2. Maintaining backward compatibility in the
lndclient library is quite an effort. We decided to merge the v0.11.1
branch into master meaning that all our projects now have this minimum
version requirement.
Since the lsat code was copied over to aperture a while ago for other
projects to use as well, we should migrate over to that shared code
also. This will give us the recently added "remove token if payment
failed and try again" feature for free along with some other small
updates to the lsat package.
To make sure we don't just block for forever if another Loop daemon
process is already running, we add a timeout and error out if obtaining
the unique file lock fails after 5 seconds.
