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During the final part of the channel funding negotiation we only need to assemble the full funding TX with the witness if we are going to publish the transaction ourselves. If the final funding TX is published externally we don't need this information. This will make it possible to skip the verify process for fully externally funded PSBT channels.
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