To make sure we don't just block for forever if another Pool daemon
process is already running, we add a timeout and error out if obtaining
the unique file lock fails after 5 seconds.
Both the trader offering to buy a sidecar channel for another node as
well as the recipient node will need to store the involved sidecar
tickets in their local databases. We add a simple store interface and
its implementation that will be used in future commits.
This commits serves as preparatory work for committing a pending batch
before providing signatures to the auctioneer. This is achieved by first
storing the batch as pending upon receiving a new batch and marking it
as complete upon receiving a finalize message.
This aims to satisfy the account.Store dependency required by the
account.Manager. We now extend our bolt database to store information
about any pending and confirmed accounts we've opened.
In this commit, we add a persistent store backed by bolt for the client
portion of CLM in which we'll store critical information required for
its proper operation.
