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d416ed59ea
Previously it wasn't possible to store a preimage in the invoice database and signal that a payment should not be settled right away. The only way to hold a payment was to insert the magic UnknownPreimage value in the invoice database. This commit introduces a distinct flag to signal that an invoice is a hold invoice and thereby allows the preimage to be present in the database already. Preparation for (key send) hodl invoices for which we already know the preimage.
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