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rpcwebsocket: notify spends already in the mempool

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This commit adds a logic to the addSpentRequests that inspects the
mempool for any spends of the outputs. Before this commit, a spend would
only be checked when a transaction was first accepted into the mempool.
This commit is contained in:
Johan T. Halseth 2018-03-23 15:44:35 +01:00 committed by Olaoluwa Osuntokun
parent c758834800
commit 3082ae92c3
1 changed files with 17 additions and 1 deletions
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18
rpcwebsocket.go
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@ -883,7 +883,7 @@ func (m *wsNotificationManager) RegisterSpentRequests(wsc *wsClient, ops []*wire
// addSpentRequests modifies a map of watched outpoints to sets of websocket
// clients to add a new request watch all of the outpoints in ops and create
// and send a notification when spent to the websocket client wsc.
func (*wsNotificationManager) addSpentRequests(opMap map[wire.OutPoint]map[chan struct{}]*wsClient,
func (m *wsNotificationManager) addSpentRequests(opMap map[wire.OutPoint]map[chan struct{}]*wsClient,
wsc *wsClient, ops []*wire.OutPoint) {
for _, op := range ops {
@ -900,6 +900,22 @@ func (*wsNotificationManager) addSpentRequests(opMap map[wire.OutPoint]map[chan
}
cmap[wsc.quit] = wsc
}
// Check if any transactions spending these outputs already exists in
// the mempool, if so send the notification immediately.
spends := make(map[chainhash.Hash]*btcutil.Tx)
for _, op := range ops {
spend := m.server.cfg.TxMemPool.CheckSpend(*op)
if spend != nil {
rpcsLog.Debugf("Found existing mempool spend for "+
"outpoint<%v>: %v", op, spend.Hash())
spends[*spend.Hash()] = spend
}
}
for _, spend := range spends {
m.notifyForTx(opMap, nil, spend, nil)
}
}
// UnregisterSpentRequest removes a request from the passed websocket client