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52c00e8cc4
This commit moves the struct `paymentState` used in `routing` into `channeldb` and replaces it with `MPPaymentState`. In the following commit we'd see the benefit, that we don't need to pass variables back and forth between the two packages. More importantly, this state is put closer to its origin, and is strictly updated whenever a payment is read from disk. This approach is less error-prone comparing to the previous one, which both the `payment` and `paymentState` need to be updated at the same time to make sure the data stay consistant in a parallel environment.
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