LBRYCommunity/lbcwallet
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Remove tx send/recv write order synchronization.

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This was only necessary for a very old version of the transaction
store.  The current implementation stores both sent (debit) and
received (credit) records for individual transactions.
This commit is contained in:
Josh Rickmar 2014-06-16 15:47:05 -05:00
parent afee3e2ca7
commit f418fe3772
3 changed files with 0 additions and 86 deletions
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4
cmd.go
View file

@ -182,10 +182,6 @@ func main() {
server.Start()
// Begin maintanence goroutines.
go SendBeforeReceiveHistorySync(SendTxHistSyncChans.add,
SendTxHistSyncChans.done,
SendTxHistSyncChans.remove,
SendTxHistSyncChans.access)
go StoreNotifiedMempoolRecvTxs(NotifiedRecvTxChans.add,
NotifiedRecvTxChans.remove,
NotifiedRecvTxChans.access)

18
rpcclient.go
View file

@ -227,24 +227,6 @@ func (n recvTx) handleNotification() error {
return fmt.Errorf("cannot get current block: %v", err)
}
// For transactions originating from this wallet, the sent tx history should
// be recorded before the received history. If wallet created this tx, wait
// for the sent history to finish being recorded before continuing.
//
// TODO(jrick) this is wrong due to tx malleability. Cannot safely use the
// txsha as an identifier.
req := SendTxHistSyncRequest{
txsha: *n.tx.Sha(),
response: make(chan SendTxHistSyncResponse),
}
SendTxHistSyncChans.access <- req
resp := <-req.response
if resp.ok {
// Wait until send history has been recorded.
<-resp.c
SendTxHistSyncChans.remove <- *n.tx.Sha()
}
AcctMgr.Grab()
defer AcctMgr.Release()

64
rpcserver.go
View file

@ -1884,10 +1884,6 @@ func sendPairs(icmd btcjson.Cmd, account string, amounts map[string]btcutil.Amou
}
}
// Mark txid as having send history so handlers adding receive history
// wait until all send history has been written.
SendTxHistSyncChans.add <- *createdTx.tx.Sha()
// If a change address was added, sync wallet to disk and request
// transaction notifications to the change address.
if createdTx.changeAddr != nil {
@ -1903,10 +1899,8 @@ func sendPairs(icmd btcjson.Cmd, account string, amounts map[string]btcutil.Amou
txSha, err := client.SendRawTransaction(createdTx.tx.MsgTx(), false)
if err != nil {
SendTxHistSyncChans.remove <- *createdTx.tx.Sha()
return nil, err
}
if err := handleSendRawTxReply(icmd, txSha, a, createdTx); err != nil {
return nil, err
}
@ -1991,61 +1985,6 @@ func SendToAddress(icmd btcjson.Cmd) (interface{}, error) {
return sendPairs(cmd, "", pairs, 1)
}
// Channels to manage SendBeforeReceiveHistorySync.
var SendTxHistSyncChans = struct {
add, done, remove chan btcwire.ShaHash
access chan SendTxHistSyncRequest
}{
add: make(chan btcwire.ShaHash),
remove: make(chan btcwire.ShaHash),
done: make(chan btcwire.ShaHash),
access: make(chan SendTxHistSyncRequest),
}
// SendTxHistSyncRequest requests a SendTxHistSyncResponse from
// SendBeforeReceiveHistorySync.
type SendTxHistSyncRequest struct {
txsha btcwire.ShaHash
response chan SendTxHistSyncResponse
}
// SendTxHistSyncResponse is the response
type SendTxHistSyncResponse struct {
c chan struct{}
ok bool
}
// SendBeforeReceiveHistorySync manages a set of transaction hashes
// created by this wallet. For each newly added txsha, a channel is
// created. Once the send history has been recorded, the txsha should
// be messaged across done, causing the internal channel to be closed.
// Before receive history is recorded, access should be used to check
// if there are or were any goroutines writing send history, and if
// so, wait until the channel is closed after a done message.
func SendBeforeReceiveHistorySync(add, done, remove chan btcwire.ShaHash,
access chan SendTxHistSyncRequest) {
m := make(map[btcwire.ShaHash]chan struct{})
for {
select {
case txsha := <-add:
m[txsha] = make(chan struct{})
case txsha := <-remove:
delete(m, txsha)
case txsha := <-done:
if c, ok := m[txsha]; ok {
close(c)
}
case req := <-access:
c, ok := m[req.txsha]
req.response <- SendTxHistSyncResponse{c: c, ok: ok}
}
}
}
func handleSendRawTxReply(icmd btcjson.Cmd, txSha *btcwire.ShaHash, a *Account, txInfo *CreatedTx) error {
// Add to transaction store.
txr, err := a.TxStore.InsertTx(txInfo.tx, nil)
@ -2073,9 +2012,6 @@ func handleSendRawTxReply(icmd btcjson.Cmd, txSha *btcwire.ShaHash, a *Account,
}
}
// Signal that received notifiations are ok to add now.
SendTxHistSyncChans.done <- *txInfo.tx.Sha()
// Disk sync tx and utxo stores.
if err := AcctMgr.ds.FlushAccount(a); err != nil {
log.Errorf("Cannot write account: %v", err)