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4b316d97c8
In this commit, we add a new method WithCoinSelectLock. This method will allow us to fix bugs in the project atm that can arise if a channel funding is attempted (either manually or by autopilot) while a users is attempting to send an on-chain transaction. If this happens concurrently, then both contexts will grab the set of UTXOs and attempt to lock them one by one. However, since they didn't obtain an exclusive snapshot of the UTXO set of the wallet, they may both attempt to lock the same input. We also ensure that calls to SendMany cannot run into this issue by using the WithCoinSelectLock synchronization when attempting to instruct the internal wallet to send payments.
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