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In this commit, we add the WitnessCache sub-storage system of the greater database. The WitnessCache is a persistent cache of all witnesses we’ve encountered on the network. We’ll use this cache to share any on-chain discoveries between active channels. Eventually we’ll also use this to enforce the variant that a preimage is only to be used ONCE on the network.
channeldb
The channeldb implements the persistent storage engine for lnd
and
generically a data storage layer for the required state within the Lightning
Network. The backing storage engine is
boltdb, an embedded pure-go key-value store
based off of LMDB.
The package implements an object-oriented storage model with queries and mutations flowing through a particular object instance rather than the database itself. The storage implemented by the objects includes: open channels, past commitment revocation states, the channel graph which includes authenticated node and channel announcements, outgoing payments, and invoices
Installation and Updating
$ go get -u github.com/lightningnetwork/lnd/channeldb