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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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23
chainntnfs/bitcoindnotify/bitcoind.go
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@@ -568,14 +568,19 @@ func (b *BitcoindNotifier) confDetailsManually(txid *chainhash.Hash,
// transactions included this block will processed to either send notifications
// now or after numConfirmations confs.
func (b *BitcoindNotifier) handleBlockConnected(block chainntnfs.BlockEpoch) error {
// First, we'll fetch the raw block as we'll need to gather all the
// transactions to determine whether any are relevant to our registered
// clients.
rawBlock, err := b.chainConn.GetBlock(block.Hash)
if err != nil {
return fmt.Errorf("unable to get block: %v", err)
}
txns := btcutil.NewBlock(rawBlock).Transactions()
err = b.txNotifier.ConnectTip(
block.Hash, uint32(block.Height), txns)
// We'll then extend the txNotifier's height with the information of
// this new block, which will handle all of the notification logic for
// us.
err = b.txNotifier.ConnectTip(block.Hash, uint32(block.Height), txns)
if err != nil {
return fmt.Errorf("unable to connect tip: %v", err)
}
@@ -583,15 +588,15 @@ func (b *BitcoindNotifier) handleBlockConnected(block chainntnfs.BlockEpoch) err
chainntnfs.Log.Infof("New block: height=%v, sha=%v", block.Height,
block.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.
b.bestBlock = block
// Lastly we'll notify any subscribed clients of the block.
b.notifyBlockEpochs(block.Height, block.Hash)
return nil
return b.txNotifier.NotifyHeight(uint32(block.Height))
}
// notifyBlockEpochs notifies all registered block epoch clients of the newly