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chainntnfs: dispatch conf/spend notifications after blocks

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In this commit, we alter the different ChainNotifier implementations to
dispatch confirmation and spend notifications after blocks. We do this
to ensure the external consistency of our registered clients.
This commit is contained in:
Wilmer Paulino
2018-10-11 17:30:40 -07:00
parent 770e005943
commit e402a4e146
3 changed files with 35 additions and 28 deletions
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18
chainntnfs/neutrinonotify/neutrino.go
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@@ -542,9 +542,8 @@ func (n *NeutrinoNotifier) historicalConfDetails(targetHash *chainhash.Hash,
// transactions included this block will processed to either send notifications
// now or after numConfirmations confs.
func (n *NeutrinoNotifier) handleBlockConnected(newBlock *filteredBlock) error {
// First process the block for our internal state. A new block has
// been connected to the main chain. Send out any N confirmation
// notifications which may have been triggered by this new block.
// We'll extend the txNotifier's height with the information of this new
// block, which will handle all of the notification logic for us.
err := n.txNotifier.ConnectTip(
&newBlock.hash, newBlock.height, newBlock.txns,
)
@@ -555,16 +554,15 @@ func (n *NeutrinoNotifier) handleBlockConnected(newBlock *filteredBlock) error {
chainntnfs.Log.Infof("New block: height=%v, sha=%v", newBlock.height,
newBlock.hash)
// We want to set the best block before dispatching notifications
// so if any subscribers make queries based on their received
// block epoch, our state is fully updated in time.
// Now that we've guaranteed the new block extends the txNotifier's
// current tip, we'll proceed to dispatch notifications to all of our
// registered clients whom have had notifications fulfilled. Before
// doing so, we'll make sure update our in memory state in order to
// satisfy any client requests based upon the new block.
n.bestHeight = newBlock.height
// With all persistent changes committed, notify any subscribed clients
// of the block.
n.notifyBlockEpochs(int32(newBlock.height), &newBlock.hash)
return nil
return n.txNotifier.NotifyHeight(newBlock.height)
}
// getFilteredBlock is a utility to retrieve the full filtered block from a block epoch.