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Avoids indexing the all-zeros pay addr, since it is still in use by legacy keysend. Without this, the pay addr index will reject all but the first keysend since they will be detected as duplicates within the set id index.
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