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4fadbb09bd
The objective of this commit is to make paymentDescriptor a private data structure so we can quarantine it to the lnwallet package. To accomplish this we had to prevent it from leaking out via the arguments or return values of the public functions in lnwallet. This naturally had consequences for the htlcswitch package as we choose other mechanisms for tracking the data that paymentDescriptor was responsible for. Astoundingly, this was highly successful and allowed us to remove a ton of redundant code. The diff for this commit represents a substantial reduction in total lines of code as well as extraneous arguments and return values from key functions. This also sets the stage for future commits where we actually will be attempting to rid lnwallet of paymentDescriptor completely.
lnwallet
The lnwallet package implements an abstracted wallet controller that is able to drive channel funding workflows, a number of script utilities, witness generation functions for the various Lightning scripts, revocation key derivation, and the commitment update state machine.
The package is used within lnd as the core wallet of the daemon. The wallet
itself is composed of several distinct interfaces that decouple the
implementation of things like signing and blockchain access. This separation
allows new WalletController implementations to be easily dropped into
lnd without disrupting the code base. A series of integration tests at the
interface level are also in place to ensure conformance of the implementation
with the interface.
Installation and Updating
$ go get -u github.com/lightningnetwork/lnd/lnwallet