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180dffd154
In this commit, we modify the logic within RegisterSpendNtfn for the BitcoindNotifier to account for the recent changes made to the TxNotifier. Since it is now able to handle spend notification registration and dispatch, we can bypass all the current logic within the BitcoindNotifier and interact directly with the TxNotifier instead. The most notable changes include the following: 1. We'll only attempt a historical rescan if the TxNotifier tells us so. 2. We'll dispatch the historical rescan within the main goroutine to prevent WaitGroup panics, due to the asynchronous nature of the notifier.
chainntnfs
The chainntnfs package implements a set of interfaces which allow callers to receive notifications in response to specific on-chain events. The set of notifications available include:
- Notifications for each new block connected to the current best chain.
- Notifications once a
txidhas reached a specified number of confirmations. - Notifications once a target outpoint (
txid:index) has been spent.
These notifications are used within lnd in order to properly handle the
workflows for: channel funding, cooperative channel closures, forced channel
closures, channel contract breaches, sweeping time-locked outputs, and finally
pruning the channel graph.
This package is intentionally general enough to be applicable outside the
specific use cases within lnd outlined above. The current sole concrete
implementation of the ChainNotifier interface depends on btcd.
Installation and Updating
$ go get -u github.com/lightningnetwork/lnd/chainntnfs