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Merge #11281: Avoid permanent cs_main/cs_wallet lock during RescanFromTime

Browse Source 
7f81250 Mention that other RPC calls report keys as "imported" while txns are still missing (Jonas Schnelli)
ccd8ef6 Reduce cs_main lock in ReadBlockFromDisk, only read GetBlockPos under the lock (Jonas Schnelli)
bc356b4 Make sure WalletRescanReserver has successfully reserved the rescan (Jonas Schnelli)
dbf8556 Add RAII wallet rescan reserver (Jonas Schnelli)
8d0b610 Avoid pemanent cs_main/cs_wallet lock during wallet rescans (Jonas Schnelli)

Pull request description:

  Right now, we are holding `cs_main`/`cs_wallet` during the whole rescan process (which can take a couple of hours).
  This was probably only done because of laziness and it is an important show-stopper for #11200 (GUI rescan abort).

Tree-SHA512: 0fc3f82d0ee9b2f013e6bacba8d59f7334306660cd676cd64c47bb305c4cb7c7a36219d6a6f76023b74e5fe87f3ab9fc7fd2439e939f71aef653fddb0a1e23b1
This commit is contained in:
Wladimir J. van der Laan
2018-01-24 12:29:30 +01:00
parent b5e4b9b510 7f812502b7
commit 8470e64724
7 changed files with 366 additions and 232 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/qt/test/wallettests.cpp
View File

@@ -169,7 +169,9 @@ void TestGUI()
}
{
LOCK(cs_main);
wallet.ScanForWalletTransactions(chainActive.Genesis(), nullptr, true);
WalletRescanReserver reserver(&wallet);
reserver.reserve();
wallet.ScanForWalletTransactions(chainActive.Genesis(), nullptr, reserver, true);
}
wallet.SetBroadcastTransactions(true);

8
src/validation.cpp
View File

@@ -1121,7 +1121,13 @@ bool ReadBlockFromDisk(CBlock& block, const CDiskBlockPos& pos, const Consensus:
bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex, const Consensus::Params& consensusParams)
{
if (!ReadBlockFromDisk(block, pindex->GetBlockPos(), consensusParams))
CDiskBlockPos blockPos;
{
LOCK(cs_main);
blockPos = pindex->GetBlockPos();
}
if (!ReadBlockFromDisk(block, blockPos, consensusParams))
return false;
if (block.GetHash() != pindex->GetBlockHash())
return error("ReadBlockFromDisk(CBlock&, CBlockIndex*): GetHash() doesn't match index for %s at %s",

406
src/wallet/rpcdump.cpp
View File

@@ -86,7 +86,8 @@ UniValue importprivkey(const JSONRPCRequest& request)
"1. \"privkey\" (string, required) The private key (see dumpprivkey)\n"
"2. \"label\" (string, optional, default=\"\") An optional label\n"
"3. rescan (boolean, optional, default=true) Rescan the wallet for transactions\n"
"\nNote: This call can take minutes to complete if rescan is true.\n"
"\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
"may report that the imported key exists but related transactions are still missing, leading to temporarily incorrect/bogus balances and unspent outputs until rescan completes.\n"
"\nExamples:\n"
"\nDump a private key\n"
+ HelpExampleCli("dumpprivkey", "\"myaddress\"") +
@@ -101,61 +102,65 @@ UniValue importprivkey(const JSONRPCRequest& request)
);
LOCK2(cs_main, pwallet->cs_wallet);
EnsureWalletIsUnlocked(pwallet);
std::string strSecret = request.params[0].get_str();
std::string strLabel = "";
if (!request.params[1].isNull())
strLabel = request.params[1].get_str();
// Whether to perform rescan after import
WalletRescanReserver reserver(pwallet);
bool fRescan = true;
if (!request.params[2].isNull())
fRescan = request.params[2].get_bool();
if (fRescan && fPruneMode)
throw JSONRPCError(RPC_WALLET_ERROR, "Rescan is disabled in pruned mode");
CBitcoinSecret vchSecret;
bool fGood = vchSecret.SetString(strSecret);
if (!fGood) throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key encoding");
CKey key = vchSecret.GetKey();
if (!key.IsValid()) throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
CPubKey pubkey = key.GetPubKey();
assert(key.VerifyPubKey(pubkey));
CKeyID vchAddress = pubkey.GetID();
{
pwallet->MarkDirty();
LOCK2(cs_main, pwallet->cs_wallet);
// We don't know which corresponding address will be used; label them all
for (const auto& dest : GetAllDestinationsForKey(pubkey)) {
pwallet->SetAddressBook(dest, strLabel, "receive");
EnsureWalletIsUnlocked(pwallet);
std::string strSecret = request.params[0].get_str();
std::string strLabel = "";
if (!request.params[1].isNull())
strLabel = request.params[1].get_str();
// Whether to perform rescan after import
if (!request.params[2].isNull())
fRescan = request.params[2].get_bool();
if (fRescan && fPruneMode)
throw JSONRPCError(RPC_WALLET_ERROR, "Rescan is disabled in pruned mode");
if (fRescan && !reserver.reserve()) {
throw JSONRPCError(RPC_WALLET_ERROR, "Wallet is currently rescanning. Abort existing rescan or wait.");
}
// Don't throw error in case a key is already there
if (pwallet->HaveKey(vchAddress)) {
return NullUniValue;
}
pwallet->mapKeyMetadata[vchAddress].nCreateTime = 1;
if (!pwallet->AddKeyPubKey(key, pubkey)) {
throw JSONRPCError(RPC_WALLET_ERROR, "Error adding key to wallet");
}
pwallet->LearnAllRelatedScripts(pubkey);
// whenever a key is imported, we need to scan the whole chain
pwallet->UpdateTimeFirstKey(1);
if (fRescan) {
pwallet->RescanFromTime(TIMESTAMP_MIN, true /* update */);
CBitcoinSecret vchSecret;
bool fGood = vchSecret.SetString(strSecret);
if (!fGood) throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key encoding");
CKey key = vchSecret.GetKey();
if (!key.IsValid()) throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
CPubKey pubkey = key.GetPubKey();
assert(key.VerifyPubKey(pubkey));
CKeyID vchAddress = pubkey.GetID();
{
pwallet->MarkDirty();
// We don't know which corresponding address will be used; label them all
for (const auto& dest : GetAllDestinationsForKey(pubkey)) {
pwallet->SetAddressBook(dest, strLabel, "receive");
}
// Don't throw error in case a key is already there
if (pwallet->HaveKey(vchAddress)) {
return NullUniValue;
}
// whenever a key is imported, we need to scan the whole chain
pwallet->UpdateTimeFirstKey(1);
pwallet->mapKeyMetadata[vchAddress].nCreateTime = 1;
if (!pwallet->AddKeyPubKey(key, pubkey)) {
throw JSONRPCError(RPC_WALLET_ERROR, "Error adding key to wallet");
}
pwallet->LearnAllRelatedScripts(pubkey);
}
}
if (fRescan) {
pwallet->RescanFromTime(TIMESTAMP_MIN, reserver, true /* update */);
}
return NullUniValue;
}
@@ -237,7 +242,8 @@ UniValue importaddress(const JSONRPCRequest& request)
"2. \"label\" (string, optional, default=\"\") An optional label\n"
"3. rescan (boolean, optional, default=true) Rescan the wallet for transactions\n"
"4. p2sh (boolean, optional, default=false) Add the P2SH version of the script as well\n"
"\nNote: This call can take minutes to complete if rescan is true.\n"
"\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
"may report that the imported address exists but related transactions are still missing, leading to temporarily incorrect/bogus balances and unspent outputs until rescan completes.\n"
"If you have the full public key, you should call importpubkey instead of this.\n"
"\nNote: If you import a non-standard raw script in hex form, outputs sending to it will be treated\n"
"as change, and not show up in many RPCs.\n"
@@ -263,29 +269,35 @@ UniValue importaddress(const JSONRPCRequest& request)
if (fRescan && fPruneMode)
throw JSONRPCError(RPC_WALLET_ERROR, "Rescan is disabled in pruned mode");
WalletRescanReserver reserver(pwallet);
if (fRescan && !reserver.reserve()) {
throw JSONRPCError(RPC_WALLET_ERROR, "Wallet is currently rescanning. Abort existing rescan or wait.");
}
// Whether to import a p2sh version, too
bool fP2SH = false;
if (!request.params[3].isNull())
fP2SH = request.params[3].get_bool();
LOCK2(cs_main, pwallet->cs_wallet);
{
LOCK2(cs_main, pwallet->cs_wallet);
CTxDestination dest = DecodeDestination(request.params[0].get_str());
if (IsValidDestination(dest)) {
if (fP2SH) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Cannot use the p2sh flag with an address - use a script instead");
CTxDestination dest = DecodeDestination(request.params[0].get_str());
if (IsValidDestination(dest)) {
if (fP2SH) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Cannot use the p2sh flag with an address - use a script instead");
}
ImportAddress(pwallet, dest, strLabel);
} else if (IsHex(request.params[0].get_str())) {
std::vector<unsigned char> data(ParseHex(request.params[0].get_str()));
ImportScript(pwallet, CScript(data.begin(), data.end()), strLabel, fP2SH);
} else {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address or script");
}
ImportAddress(pwallet, dest, strLabel);
} else if (IsHex(request.params[0].get_str())) {
std::vector<unsigned char> data(ParseHex(request.params[0].get_str()));
ImportScript(pwallet, CScript(data.begin(), data.end()), strLabel, fP2SH);
} else {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address or script");
}
if (fRescan)
{
pwallet->RescanFromTime(TIMESTAMP_MIN, true /* update */);
pwallet->RescanFromTime(TIMESTAMP_MIN, reserver, true /* update */);
pwallet->ReacceptWalletTransactions();
}
@@ -406,7 +418,8 @@ UniValue importpubkey(const JSONRPCRequest& request)
"1. \"pubkey\" (string, required) The hex-encoded public key\n"
"2. \"label\" (string, optional, default=\"\") An optional label\n"
"3. rescan (boolean, optional, default=true) Rescan the wallet for transactions\n"
"\nNote: This call can take minutes to complete if rescan is true.\n"
"\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
"may report that the imported pubkey exists but related transactions are still missing, leading to temporarily incorrect/bogus balances and unspent outputs until rescan completes.\n"
"\nExamples:\n"
"\nImport a public key with rescan\n"
+ HelpExampleCli("importpubkey", "\"mypubkey\"") +
@@ -429,6 +442,11 @@ UniValue importpubkey(const JSONRPCRequest& request)
if (fRescan && fPruneMode)
throw JSONRPCError(RPC_WALLET_ERROR, "Rescan is disabled in pruned mode");
WalletRescanReserver reserver(pwallet);
if (fRescan && !reserver.reserve()) {
throw JSONRPCError(RPC_WALLET_ERROR, "Wallet is currently rescanning. Abort existing rescan or wait.");
}
if (!IsHex(request.params[0].get_str()))
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey must be a hex string");
std::vector<unsigned char> data(ParseHex(request.params[0].get_str()));
@@ -436,17 +454,18 @@ UniValue importpubkey(const JSONRPCRequest& request)
if (!pubKey.IsFullyValid())
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Pubkey is not a valid public key");
LOCK2(cs_main, pwallet->cs_wallet);
{
LOCK2(cs_main, pwallet->cs_wallet);
for (const auto& dest : GetAllDestinationsForKey(pubKey)) {
ImportAddress(pwallet, dest, strLabel);
for (const auto& dest : GetAllDestinationsForKey(pubKey)) {
ImportAddress(pwallet, dest, strLabel);
}
ImportScript(pwallet, GetScriptForRawPubKey(pubKey), strLabel, false);
pwallet->LearnAllRelatedScripts(pubKey);
}
ImportScript(pwallet, GetScriptForRawPubKey(pubKey), strLabel, false);
pwallet->LearnAllRelatedScripts(pubKey);
if (fRescan)
{
pwallet->RescanFromTime(TIMESTAMP_MIN, true /* update */);
pwallet->RescanFromTime(TIMESTAMP_MIN, reserver, true /* update */);
pwallet->ReacceptWalletTransactions();
}
@@ -479,91 +498,98 @@ UniValue importwallet(const JSONRPCRequest& request)
if (fPruneMode)
throw JSONRPCError(RPC_WALLET_ERROR, "Importing wallets is disabled in pruned mode");
LOCK2(cs_main, pwallet->cs_wallet);
EnsureWalletIsUnlocked(pwallet);
std::ifstream file;
file.open(request.params[0].get_str().c_str(), std::ios::in | std::ios::ate);
if (!file.is_open())
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot open wallet dump file");
int64_t nTimeBegin = chainActive.Tip()->GetBlockTime();
bool fGood = true;
int64_t nFilesize = std::max((int64_t)1, (int64_t)file.tellg());
file.seekg(0, file.beg);
pwallet->ShowProgress(_("Importing..."), 0); // show progress dialog in GUI
while (file.good()) {
pwallet->ShowProgress("", std::max(1, std::min(99, (int)(((double)file.tellg() / (double)nFilesize) * 100))));
std::string line;
std::getline(file, line);
if (line.empty() || line[0] == '#')
continue;
std::vector<std::string> vstr;
boost::split(vstr, line, boost::is_any_of(" "));
if (vstr.size() < 2)
continue;
CBitcoinSecret vchSecret;
if (vchSecret.SetString(vstr[0])) {
CKey key = vchSecret.GetKey();
CPubKey pubkey = key.GetPubKey();
assert(key.VerifyPubKey(pubkey));
CKeyID keyid = pubkey.GetID();
if (pwallet->HaveKey(keyid)) {
LogPrintf("Skipping import of %s (key already present)\n", EncodeDestination(keyid));
continue;
}
int64_t nTime = DecodeDumpTime(vstr[1]);
std::string strLabel;
bool fLabel = true;
for (unsigned int nStr = 2; nStr < vstr.size(); nStr++) {
if (boost::algorithm::starts_with(vstr[nStr], "#"))
break;
if (vstr[nStr] == "change=1")
fLabel = false;
if (vstr[nStr] == "reserve=1")
fLabel = false;
if (boost::algorithm::starts_with(vstr[nStr], "label=")) {
strLabel = DecodeDumpString(vstr[nStr].substr(6));
fLabel = true;
}
}
LogPrintf("Importing %s...\n", EncodeDestination(keyid));
if (!pwallet->AddKeyPubKey(key, pubkey)) {
fGood = false;
continue;
}
pwallet->mapKeyMetadata[keyid].nCreateTime = nTime;
if (fLabel)
pwallet->SetAddressBook(keyid, strLabel, "receive");
nTimeBegin = std::min(nTimeBegin, nTime);
} else if(IsHex(vstr[0])) {
std::vector<unsigned char> vData(ParseHex(vstr[0]));
CScript script = CScript(vData.begin(), vData.end());
if (pwallet->HaveCScript(script)) {
LogPrintf("Skipping import of %s (script already present)\n", vstr[0]);
continue;
}
if(!pwallet->AddCScript(script)) {
LogPrintf("Error importing script %s\n", vstr[0]);
fGood = false;
continue;
}
int64_t birth_time = DecodeDumpTime(vstr[1]);
if (birth_time > 0) {
pwallet->m_script_metadata[CScriptID(script)].nCreateTime = birth_time;
nTimeBegin = std::min(nTimeBegin, birth_time);
}
}
WalletRescanReserver reserver(pwallet);
if (!reserver.reserve()) {
throw JSONRPCError(RPC_WALLET_ERROR, "Wallet is currently rescanning. Abort existing rescan or wait.");
}
file.close();
pwallet->ShowProgress("", 100); // hide progress dialog in GUI
pwallet->UpdateTimeFirstKey(nTimeBegin);
pwallet->RescanFromTime(nTimeBegin, false /* update */);
int64_t nTimeBegin = 0;
bool fGood = true;
{
LOCK2(cs_main, pwallet->cs_wallet);
EnsureWalletIsUnlocked(pwallet);
std::ifstream file;
file.open(request.params[0].get_str().c_str(), std::ios::in | std::ios::ate);
if (!file.is_open()) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Cannot open wallet dump file");
}
nTimeBegin = chainActive.Tip()->GetBlockTime();
int64_t nFilesize = std::max((int64_t)1, (int64_t)file.tellg());
file.seekg(0, file.beg);
pwallet->ShowProgress(_("Importing..."), 0); // show progress dialog in GUI
while (file.good()) {
pwallet->ShowProgress("", std::max(1, std::min(99, (int)(((double)file.tellg() / (double)nFilesize) * 100))));
std::string line;
std::getline(file, line);
if (line.empty() || line[0] == '#')
continue;
std::vector<std::string> vstr;
boost::split(vstr, line, boost::is_any_of(" "));
if (vstr.size() < 2)
continue;
CBitcoinSecret vchSecret;
if (vchSecret.SetString(vstr[0])) {
CKey key = vchSecret.GetKey();
CPubKey pubkey = key.GetPubKey();
assert(key.VerifyPubKey(pubkey));
CKeyID keyid = pubkey.GetID();
if (pwallet->HaveKey(keyid)) {
LogPrintf("Skipping import of %s (key already present)\n", EncodeDestination(keyid));
continue;
}
int64_t nTime = DecodeDumpTime(vstr[1]);
std::string strLabel;
bool fLabel = true;
for (unsigned int nStr = 2; nStr < vstr.size(); nStr++) {
if (boost::algorithm::starts_with(vstr[nStr], "#"))
break;
if (vstr[nStr] == "change=1")
fLabel = false;
if (vstr[nStr] == "reserve=1")
fLabel = false;
if (boost::algorithm::starts_with(vstr[nStr], "label=")) {
strLabel = DecodeDumpString(vstr[nStr].substr(6));
fLabel = true;
}
}
LogPrintf("Importing %s...\n", EncodeDestination(keyid));
if (!pwallet->AddKeyPubKey(key, pubkey)) {
fGood = false;
continue;
}
pwallet->mapKeyMetadata[keyid].nCreateTime = nTime;
if (fLabel)
pwallet->SetAddressBook(keyid, strLabel, "receive");
nTimeBegin = std::min(nTimeBegin, nTime);
} else if(IsHex(vstr[0])) {
std::vector<unsigned char> vData(ParseHex(vstr[0]));
CScript script = CScript(vData.begin(), vData.end());
if (pwallet->HaveCScript(script)) {
LogPrintf("Skipping import of %s (script already present)\n", vstr[0]);
continue;
}
if(!pwallet->AddCScript(script)) {
LogPrintf("Error importing script %s\n", vstr[0]);
fGood = false;
continue;
}
int64_t birth_time = DecodeDumpTime(vstr[1]);
if (birth_time > 0) {
pwallet->m_script_metadata[CScriptID(script)].nCreateTime = birth_time;
nTimeBegin = std::min(nTimeBegin, birth_time);
}
}
}
file.close();
pwallet->ShowProgress("", 100); // hide progress dialog in GUI
pwallet->UpdateTimeFirstKey(nTimeBegin);
}
pwallet->RescanFromTime(nTimeBegin, reserver, false /* update */);
pwallet->MarkDirty();
if (!fGood)
@@ -685,7 +711,7 @@ UniValue dumpwallet(const JSONRPCRequest& request)
file << strprintf("# mined on %s\n", EncodeDumpTime(chainActive.Tip()->GetBlockTime()));
file << "\n";
// add the base58check encoded extended master if the wallet uses HD
// add the base58check encoded extended master if the wallet uses HD
CKeyID masterKeyID = pwallet->GetHDChain().masterKeyID;
if (!masterKeyID.IsNull())
{
@@ -1110,6 +1136,8 @@ UniValue importmulti(const JSONRPCRequest& mainRequest)
" {\n"
" \"rescan\": <false>, (boolean, optional, default: true) Stating if should rescan the blockchain after all imports\n"
" }\n"
"\nNote: This call can take minutes to complete if rescan is true, during that time, other rpc calls\n"
"may report that the imported keys, addresses or scripts exists but related transactions are still missing.\n"
"\nExamples:\n" +
HelpExampleCli("importmulti", "'[{ \"scriptPubKey\": { \"address\": \"<my address>\" }, \"timestamp\":1455191478 }, "
"{ \"scriptPubKey\": { \"address\": \"<my 2nd address>\" }, \"label\": \"example 2\", \"timestamp\": 1455191480 }]'") +
@@ -1135,49 +1163,55 @@ UniValue importmulti(const JSONRPCRequest& mainRequest)
}
}
LOCK2(cs_main, pwallet->cs_wallet);
EnsureWalletIsUnlocked(pwallet);
// Verify all timestamps are present before importing any keys.
const int64_t now = chainActive.Tip() ? chainActive.Tip()->GetMedianTimePast() : 0;
for (const UniValue& data : requests.getValues()) {
GetImportTimestamp(data, now);
WalletRescanReserver reserver(pwallet);
if (fRescan && !reserver.reserve()) {
throw JSONRPCError(RPC_WALLET_ERROR, "Wallet is currently rescanning. Abort existing rescan or wait.");
}
int64_t now = 0;
bool fRunScan = false;
const int64_t minimumTimestamp = 1;
int64_t nLowestTimestamp = 0;
if (fRescan && chainActive.Tip()) {
nLowestTimestamp = chainActive.Tip()->GetBlockTime();
} else {
fRescan = false;
}
UniValue response(UniValue::VARR);
{
LOCK2(cs_main, pwallet->cs_wallet);
EnsureWalletIsUnlocked(pwallet);
for (const UniValue& data : requests.getValues()) {
const int64_t timestamp = std::max(GetImportTimestamp(data, now), minimumTimestamp);
const UniValue result = ProcessImport(pwallet, data, timestamp);
response.push_back(result);
if (!fRescan) {
continue;
// Verify all timestamps are present before importing any keys.
now = chainActive.Tip() ? chainActive.Tip()->GetMedianTimePast() : 0;
for (const UniValue& data : requests.getValues()) {
GetImportTimestamp(data, now);
}
// If at least one request was successful then allow rescan.
if (result["success"].get_bool()) {
fRunScan = true;
const int64_t minimumTimestamp = 1;
if (fRescan && chainActive.Tip()) {
nLowestTimestamp = chainActive.Tip()->GetBlockTime();
} else {
fRescan = false;
}
// Get the lowest timestamp.
if (timestamp < nLowestTimestamp) {
nLowestTimestamp = timestamp;
for (const UniValue& data : requests.getValues()) {
const int64_t timestamp = std::max(GetImportTimestamp(data, now), minimumTimestamp);
const UniValue result = ProcessImport(pwallet, data, timestamp);
response.push_back(result);
if (!fRescan) {
continue;
}
// If at least one request was successful then allow rescan.
if (result["success"].get_bool()) {
fRunScan = true;
}
// Get the lowest timestamp.
if (timestamp < nLowestTimestamp) {
nLowestTimestamp = timestamp;
}
}
}
if (fRescan && fRunScan && requests.size()) {
int64_t scannedTime = pwallet->RescanFromTime(nLowestTimestamp, true /* update */);
int64_t scannedTime = pwallet->RescanFromTime(nLowestTimestamp, reserver, true /* update */);
pwallet->ReacceptWalletTransactions();
if (scannedTime > nLowestTimestamp) {

48
src/wallet/rpcwallet.cpp
View File

@@ -3416,30 +3416,41 @@ UniValue rescanblockchain(const JSONRPCRequest& request)
);
}
LOCK2(cs_main, pwallet->cs_wallet);
CBlockIndex *pindexStart = chainActive.Genesis();
CBlockIndex *pindexStop = nullptr;
if (!request.params[0].isNull()) {
pindexStart = chainActive[request.params[0].get_int()];
if (!pindexStart) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid start_height");
}
WalletRescanReserver reserver(pwallet);
if (!reserver.reserve()) {
throw JSONRPCError(RPC_WALLET_ERROR, "Wallet is currently rescanning. Abort existing rescan or wait.");
}
if (!request.params[1].isNull()) {
pindexStop = chainActive[request.params[1].get_int()];
if (!pindexStop) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid stop_height");
CBlockIndex *pindexStart = nullptr;
CBlockIndex *pindexStop = nullptr;
CBlockIndex *pChainTip = nullptr;
{
LOCK(cs_main);
pindexStart = chainActive.Genesis();
pChainTip = chainActive.Tip();
if (!request.params[0].isNull()) {
pindexStart = chainActive[request.params[0].get_int()];
if (!pindexStart) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid start_height");
}
}
else if (pindexStop->nHeight < pindexStart->nHeight) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "stop_height must be greater then start_height");
if (!request.params[1].isNull()) {
pindexStop = chainActive[request.params[1].get_int()];
if (!pindexStop) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid stop_height");
}
else if (pindexStop->nHeight < pindexStart->nHeight) {
throw JSONRPCError(RPC_INVALID_PARAMETER, "stop_height must be greater then start_height");
}
}
}
// We can't rescan beyond non-pruned blocks, stop and throw an error
if (fPruneMode) {
CBlockIndex *block = pindexStop ? pindexStop : chainActive.Tip();
LOCK(cs_main);
CBlockIndex *block = pindexStop ? pindexStop : pChainTip;
while (block && block->nHeight >= pindexStart->nHeight) {
if (!(block->nStatus & BLOCK_HAVE_DATA)) {
throw JSONRPCError(RPC_MISC_ERROR, "Can't rescan beyond pruned data. Use RPC call getblockchaininfo to determine your pruned height.");
@@ -3448,18 +3459,17 @@ UniValue rescanblockchain(const JSONRPCRequest& request)
}
}
CBlockIndex *stopBlock = pwallet->ScanForWalletTransactions(pindexStart, pindexStop, true);
CBlockIndex *stopBlock = pwallet->ScanForWalletTransactions(pindexStart, pindexStop, reserver, true);
if (!stopBlock) {
if (pwallet->IsAbortingRescan()) {
throw JSONRPCError(RPC_MISC_ERROR, "Rescan aborted.");
}
// if we got a nullptr returned, ScanForWalletTransactions did rescan up to the requested stopindex
stopBlock = pindexStop ? pindexStop : chainActive.Tip();
stopBlock = pindexStop ? pindexStop : pChainTip;
}
else {
throw JSONRPCError(RPC_MISC_ERROR, "Rescan failed. Potentially corrupted data files.");
}
UniValue response(UniValue::VOBJ);
response.pushKV("start_height", pindexStart->nHeight);
response.pushKV("stop_height", stopBlock->nHeight);

12
src/wallet/test/wallet_tests.cpp
View File

@@ -384,7 +384,9 @@ BOOST_FIXTURE_TEST_CASE(rescan, TestChain100Setup)
{
CWallet wallet;
AddKey(wallet, coinbaseKey);
BOOST_CHECK_EQUAL(nullBlock, wallet.ScanForWalletTransactions(oldTip, nullptr));
WalletRescanReserver reserver(&wallet);
reserver.reserve();
BOOST_CHECK_EQUAL(nullBlock, wallet.ScanForWalletTransactions(oldTip, nullptr, reserver));
BOOST_CHECK_EQUAL(wallet.GetImmatureBalance(), 100 * COIN);
}
@@ -397,7 +399,9 @@ BOOST_FIXTURE_TEST_CASE(rescan, TestChain100Setup)
{
CWallet wallet;
AddKey(wallet, coinbaseKey);
BOOST_CHECK_EQUAL(oldTip, wallet.ScanForWalletTransactions(oldTip, nullptr));
WalletRescanReserver reserver(&wallet);
reserver.reserve();
BOOST_CHECK_EQUAL(oldTip, wallet.ScanForWalletTransactions(oldTip, nullptr, reserver));
BOOST_CHECK_EQUAL(wallet.GetImmatureBalance(), 50 * COIN);
}
@@ -608,7 +612,9 @@ public:
bool firstRun;
wallet->LoadWallet(firstRun);
AddKey(*wallet, coinbaseKey);
wallet->ScanForWalletTransactions(chainActive.Genesis(), nullptr);
WalletRescanReserver reserver(wallet.get());
reserver.reserve();
wallet->ScanForWalletTransactions(chainActive.Genesis(), nullptr, reserver);
}
~ListCoinsTestingSetup()

75
src/wallet/wallet.cpp
View File

@@ -1612,19 +1612,20 @@ void CWalletTx::GetAmounts(std::list<COutputEntry>& listReceived,
* @return Earliest timestamp that could be successfully scanned from. Timestamp
* returned will be higher than startTime if relevant blocks could not be read.
*/
int64_t CWallet::RescanFromTime(int64_t startTime, bool update)
int64_t CWallet::RescanFromTime(int64_t startTime, const WalletRescanReserver& reserver, bool update)
{
AssertLockHeld(cs_main);
AssertLockHeld(cs_wallet);
// Find starting block. May be null if nCreateTime is greater than the
// highest blockchain timestamp, in which case there is nothing that needs
// to be scanned.
CBlockIndex* const startBlock = chainActive.FindEarliestAtLeast(startTime - TIMESTAMP_WINDOW);
LogPrintf("%s: Rescanning last %i blocks\n", __func__, startBlock ? chainActive.Height() - startBlock->nHeight + 1 : 0);
CBlockIndex* startBlock = nullptr;
{
LOCK(cs_main);
startBlock = chainActive.FindEarliestAtLeast(startTime - TIMESTAMP_WINDOW);
LogPrintf("%s: Rescanning last %i blocks\n", __func__, startBlock ? chainActive.Height() - startBlock->nHeight + 1 : 0);
}
if (startBlock) {
const CBlockIndex* const failedBlock = ScanForWalletTransactions(startBlock, nullptr, update);
const CBlockIndex* const failedBlock = ScanForWalletTransactions(startBlock, nullptr, reserver, update);
if (failedBlock) {
return failedBlock->GetBlockTimeMax() + TIMESTAMP_WINDOW + 1;
}
@@ -1643,12 +1644,17 @@ int64_t CWallet::RescanFromTime(int64_t startTime, bool update)
*
* If pindexStop is not a nullptr, the scan will stop at the block-index
* defined by pindexStop
*
* Caller needs to make sure pindexStop (and the optional pindexStart) are on
* the main chain after to the addition of any new keys you want to detect
* transactions for.
*/
CBlockIndex* CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, CBlockIndex* pindexStop, bool fUpdate)
CBlockIndex* CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, CBlockIndex* pindexStop, const WalletRescanReserver &reserver, bool fUpdate)
{
int64_t nNow = GetTime();
const CChainParams& chainParams = Params();
assert(reserver.isReserved());
if (pindexStop) {
assert(pindexStop->nHeight >= pindexStart->nHeight);
}
@@ -1656,24 +1662,42 @@ CBlockIndex* CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, CBlock
CBlockIndex* pindex = pindexStart;
CBlockIndex* ret = nullptr;
{
LOCK2(cs_main, cs_wallet);
fAbortRescan = false;
fScanningWallet = true;
ShowProgress(_("Rescanning..."), 0); // show rescan progress in GUI as dialog or on splashscreen, if -rescan on startup
double dProgressStart = GuessVerificationProgress(chainParams.TxData(), pindex);
double dProgressTip = GuessVerificationProgress(chainParams.TxData(), chainActive.Tip());
CBlockIndex* tip = nullptr;
double dProgressStart;
double dProgressTip;
{
LOCK(cs_main);
tip = chainActive.Tip();
dProgressStart = GuessVerificationProgress(chainParams.TxData(), pindex);
dProgressTip = GuessVerificationProgress(chainParams.TxData(), tip);
}
while (pindex && !fAbortRescan)
{
if (pindex->nHeight % 100 == 0 && dProgressTip - dProgressStart > 0.0)
ShowProgress(_("Rescanning..."), std::max(1, std::min(99, (int)((GuessVerificationProgress(chainParams.TxData(), pindex) - dProgressStart) / (dProgressTip - dProgressStart) * 100))));
if (pindex->nHeight % 100 == 0 && dProgressTip - dProgressStart > 0.0) {
double gvp = 0;
{
LOCK(cs_main);
gvp = GuessVerificationProgress(chainParams.TxData(), pindex);
}
ShowProgress(_("Rescanning..."), std::max(1, std::min(99, (int)((gvp - dProgressStart) / (dProgressTip - dProgressStart) * 100))));
}
if (GetTime() >= nNow + 60) {
nNow = GetTime();
LOCK(cs_main);
LogPrintf("Still rescanning. At block %d. Progress=%f\n", pindex->nHeight, GuessVerificationProgress(chainParams.TxData(), pindex));
}
CBlock block;
if (ReadBlockFromDisk(block, pindex, Params().GetConsensus())) {
LOCK2(cs_main, cs_wallet);
if (pindex && !chainActive.Contains(pindex)) {
// Abort scan if current block is no longer active, to prevent
// marking transactions as coming from the wrong block.
ret = pindex;
break;
}
for (size_t posInBlock = 0; posInBlock < block.vtx.size(); ++posInBlock) {
AddToWalletIfInvolvingMe(block.vtx[posInBlock], pindex, posInBlock, fUpdate);
}
@@ -1683,14 +1707,20 @@ CBlockIndex* CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, CBlock
if (pindex == pindexStop) {
break;
}
pindex = chainActive.Next(pindex);
{
LOCK(cs_main);
pindex = chainActive.Next(pindex);
if (tip != chainActive.Tip()) {
tip = chainActive.Tip();
// in case the tip has changed, update progress max
dProgressTip = GuessVerificationProgress(chainParams.TxData(), tip);
}
}
}
if (pindex && fAbortRescan) {
LogPrintf("Rescan aborted at block %d. Progress=%f\n", pindex->nHeight, GuessVerificationProgress(chainParams.TxData(), pindex));
}
ShowProgress(_("Rescanning..."), 100); // hide progress dialog in GUI
fScanningWallet = false;
}
return ret;
}
@@ -4001,7 +4031,14 @@ CWallet* CWallet::CreateWalletFromFile(const std::string walletFile)
}
nStart = GetTimeMillis();
walletInstance->ScanForWalletTransactions(pindexRescan, nullptr, true);
{
WalletRescanReserver reserver(walletInstance);
if (!reserver.reserve()) {
InitError(_("Failed to rescan the wallet during initialization"));
return nullptr;
}
walletInstance->ScanForWalletTransactions(pindexRescan, nullptr, reserver, true);
}
LogPrintf(" rescan %15dms\n", GetTimeMillis() - nStart);
walletInstance->SetBestChain(chainActive.GetLocator());
walletInstance->dbw->IncrementUpdateCounter();

45
src/wallet/wallet.h
View File

@@ -659,6 +659,7 @@ private:
};
class WalletRescanReserver; //forward declarations for ScanForWalletTransactions/RescanFromTime
/**
* A CWallet is an extension of a keystore, which also maintains a set of transactions and balances,
* and provides the ability to create new transactions.
@@ -668,7 +669,10 @@ class CWallet final : public CCryptoKeyStore, public CValidationInterface
private:
static std::atomic<bool> fFlushScheduled;
std::atomic<bool> fAbortRescan;
std::atomic<bool> fScanningWallet;
std::atomic<bool> fScanningWallet; //controlled by WalletRescanReserver
std::mutex mutexScanning;
friend class WalletRescanReserver;
/**
* Select a set of coins such that nValueRet >= nTargetValue and at least
@@ -945,8 +949,8 @@ public:
void BlockConnected(const std::shared_ptr<const CBlock>& pblock, const CBlockIndex *pindex, const std::vector<CTransactionRef>& vtxConflicted) override;
void BlockDisconnected(const std::shared_ptr<const CBlock>& pblock) override;
bool AddToWalletIfInvolvingMe(const CTransactionRef& tx, const CBlockIndex* pIndex, int posInBlock, bool fUpdate);
int64_t RescanFromTime(int64_t startTime, bool update);
CBlockIndex* ScanForWalletTransactions(CBlockIndex* pindexStart, CBlockIndex* pindexStop, bool fUpdate = false);
int64_t RescanFromTime(int64_t startTime, const WalletRescanReserver& reserver, bool update);
CBlockIndex* ScanForWalletTransactions(CBlockIndex* pindexStart, CBlockIndex* pindexStop, const WalletRescanReserver& reserver, bool fUpdate = false);
void TransactionRemovedFromMempool(const CTransactionRef &ptx) override;
void ReacceptWalletTransactions();
void ResendWalletTransactions(int64_t nBestBlockTime, CConnman* connman) override;
@@ -1263,4 +1267,39 @@ CTxDestination GetDestinationForKey(const CPubKey& key, OutputType);
/** Get all destinations (potentially) supported by the wallet for the given key. */
std::vector<CTxDestination> GetAllDestinationsForKey(const CPubKey& key);
/** RAII object to check and reserve a wallet rescan */
class WalletRescanReserver
{
private:
CWalletRef m_wallet;
bool m_could_reserve;
public:
explicit WalletRescanReserver(CWalletRef w) : m_wallet(w), m_could_reserve(false) {}
bool reserve()
{
assert(!m_could_reserve);
std::lock_guard<std::mutex> lock(m_wallet->mutexScanning);
if (m_wallet->fScanningWallet) {
return false;
}
m_wallet->fScanningWallet = true;
m_could_reserve = true;
return true;
}
bool isReserved() const
{
return (m_could_reserve && m_wallet->fScanningWallet);
}
~WalletRescanReserver()
{
std::lock_guard<std::mutex> lock(m_wallet->mutexScanning);
if (m_could_reserve) {
m_wallet->fScanningWallet = false;
}
}
};
#endif // BITCOIN_WALLET_WALLET_H