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c199ad30ac
In this commit, we create a new `chanvalidate` package which it to house all logic required for 1st and 3rd party channel verification. 1st party verification occurs when we find a channel in the chain that is allegedly ours, while 3rd party verification will occur when a peer sends us a channel proof of a new channel. In the scope of the recent CVE, we actually fully verified 3rd party channels, but failed to also include those checks in our 1st party verification code. In order to unify this logic, and prevent future issues, in this PR we move to concentrate all validation logic into a single function. Both 1st and 3rd party validation will then use this function. Additionally, having all the logic in a single place makes it easier to audit, and also write tests against.
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