positiveblue
c602ac07e7
This commit moves the `HeightHintCache` implementation to the `channeldb` package and inverts the dependency relation between `chainntnfs` and `channeldb`. Many packages depend on channeldb for type definitions, interfaces, etc. `chainntnfs` is an example of that. `chainntnfs` defines the `SpendHintCache` and `ConfirmHintCache` interfaces but it also implments them (`HeightHintCache` struct). The implementation uses logic that should not leak from channeldb (ex: bucket paths). This makes our code highly coupled + it would not allow us to use any of these interfaces in a package that is imported by `channeldb` (circular dependency).
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