// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <wallet/wallet.h>
#include <chain.h>
#include <consensus/consensus.h>
#include <consensus/validation.h>
#include <fs.h>
#include <interfaces/chain.h>
#include <interfaces/wallet.h>
#include <key.h>
#include <key_io.h>
#include <optional.h>
#include <policy/fees.h>
#include <policy/policy.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <script/descriptor.h>
#include <script/script.h>
#include <script/signingprovider.h>
#include <util/bip32.h>
#include <util/error.h>
#include <util/fees.h>
#include <util/moneystr.h>
#include <util/rbf.h>
#include <util/translation.h>
#include <wallet/coincontrol.h>
#include <wallet/fees.h>
#include <algorithm>
#include <assert.h>
#include <boost/algorithm/string/replace.hpp>
const std::map<uint64_t,std::string> WALLET_FLAG_CAVEATS{
{WALLET_FLAG_AVOID_REUSE,
"You need to rescan the blockchain in order to correctly mark used "
"destinations in the past. Until this is done, some destinations may "
"be considered unused, even if the opposite is the case."
},
};
static const size_t OUTPUT_GROUP_MAX_ENTRIES = 10;
static RecursiveMutex cs_wallets;
static std::vector<std::shared_ptr<CWallet>> vpwallets GUARDED_BY(cs_wallets);
static std::list<LoadWalletFn> g_load_wallet_fns GUARDED_BY(cs_wallets);
bool AddWallet(const std::shared_ptr<CWallet>& wallet)
{
LOCK(cs_wallets);
assert(wallet);
std::vector<std::shared_ptr<CWallet>>::const_iterator i = std::find(vpwallets.begin(), vpwallets.end(), wallet);
if (i != vpwallets.end()) return false;
vpwallets.push_back(wallet);
wallet->ConnectScriptPubKeyManNotifiers();
return true;
}
bool RemoveWallet(const std::shared_ptr<CWallet>& wallet)
{
assert(wallet);
// Unregister with the validation interface which also drops shared ponters.
wallet->m_chain_notifications_handler.reset();
LOCK(cs_wallets);
std::vector<std::shared_ptr<CWallet>>::iterator i = std::find(vpwallets.begin(), vpwallets.end(), wallet);
if (i == vpwallets.end()) return false;
vpwallets.erase(i);
return true;
}
bool HasWallets()
{
LOCK(cs_wallets);
return !vpwallets.empty();
}
std::vector<std::shared_ptr<CWallet>> GetWallets()
{
LOCK(cs_wallets);
return vpwallets;
}
std::shared_ptr<CWallet> GetWallet(const std::string& name)
{
LOCK(cs_wallets);
for (const std::shared_ptr<CWallet>& wallet : vpwallets) {
if (wallet->GetName() == name) return wallet;
}
return nullptr;
}
std::unique_ptr<interfaces::Handler> HandleLoadWallet(LoadWalletFn load_wallet)
{
LOCK(cs_wallets);
auto it = g_load_wallet_fns.emplace(g_load_wallet_fns.end(), std::move(load_wallet));
return interfaces::MakeHandler([it] { LOCK(cs_wallets); g_load_wallet_fns.erase(it); });
}
static Mutex g_wallet_release_mutex;
static std::condition_variable g_wallet_release_cv;
static std::set<std::string> g_unloading_wallet_set;
// Custom deleter for shared_ptr<CWallet>.
static void ReleaseWallet(CWallet* wallet)
{
const std::string name = wallet->GetName();
wallet->WalletLogPrintf("Releasing wallet\n");
wallet->Flush();
delete wallet;
// Wallet is now released, notify UnloadWallet, if any.
{
LOCK(g_wallet_release_mutex);
if (g_unloading_wallet_set.erase(name) == 0) {
// UnloadWallet was not called for this wallet, all done.
return;
}
}
g_wallet_release_cv.notify_all();
}
void UnloadWallet(std::shared_ptr<CWallet>&& wallet)
{
// Mark wallet for unloading.
const std::string name = wallet->GetName();
{
LOCK(g_wallet_release_mutex);
auto it = g_unloading_wallet_set.insert(name);
assert(it.second);
}
// The wallet can be in use so it's not possible to explicitly unload here.
// Notify the unload intent so that all remaining shared pointers are
// released.
wallet->NotifyUnload();
// Time to ditch our shared_ptr and wait for ReleaseWallet call.
wallet.reset();
{
WAIT_LOCK(g_wallet_release_mutex, lock);
while (g_unloading_wallet_set.count(name) == 1) {
g_wallet_release_cv.wait(lock);
}
}
}
std::shared_ptr<CWallet> LoadWallet(interfaces::Chain& chain, const WalletLocation& location, std::string& error, std::vector<std::string>& warnings)
{
try {
if (!CWallet::Verify(chain, location, false, error, warnings)) {
error = "Wallet file verification failed: " + error;
return nullptr;
}
std::shared_ptr<CWallet> wallet = CWallet::CreateWalletFromFile(chain, location, error, warnings);
if (!wallet) {
error = "Wallet loading failed: " + error;
return nullptr;
}
AddWallet(wallet);
wallet->postInitProcess();
return wallet;
} catch (const std::runtime_error& e) {
error = e.what();
return nullptr;
}
}
std::shared_ptr<CWallet> LoadWallet(interfaces::Chain& chain, const std::string& name, std::string& error, std::vector<std::string>& warnings)
{
return LoadWallet(chain, WalletLocation(name), error, warnings);
}
WalletCreationStatus CreateWallet(interfaces::Chain& chain, const SecureString& passphrase, uint64_t wallet_creation_flags, const std::string& name, std::string& error, std::vector<std::string>& warnings, std::shared_ptr<CWallet>& result)
{
// Indicate that the wallet is actually supposed to be blank and not just blank to make it encrypted
bool create_blank = (wallet_creation_flags & WALLET_FLAG_BLANK_WALLET);
// Born encrypted wallets need to be created blank first.
if (!passphrase.empty()) {
wallet_creation_flags |= WALLET_FLAG_BLANK_WALLET;
}
// Check the wallet file location
WalletLocation location(name);
if (location.Exists()) {
error = "Wallet " + location.GetName() + " already exists.";
return WalletCreationStatus::CREATION_FAILED;
}
// Wallet::Verify will check if we're trying to create a wallet with a duplicate name.
if (!CWallet::Verify(chain, location, false, error, warnings)) {
error = "Wallet file verification failed: " + error;
return WalletCreationStatus::CREATION_FAILED;
}
// Do not allow a passphrase when private keys are disabled
if (!passphrase.empty() && (wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
error = "Passphrase provided but private keys are disabled. A passphrase is only used to encrypt private keys, so cannot be used for wallets with private keys disabled.";
return WalletCreationStatus::CREATION_FAILED;
}
// Make the wallet
std::shared_ptr<CWallet> wallet = CWallet::CreateWalletFromFile(chain, location, error, warnings, wallet_creation_flags);
if (!wallet) {
error = "Wallet creation failed: " + error;
return WalletCreationStatus::CREATION_FAILED;
}
// Encrypt the wallet
if (!passphrase.empty() && !(wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
if (!wallet->EncryptWallet(passphrase)) {
error = "Error: Wallet created but failed to encrypt.";
return WalletCreationStatus::ENCRYPTION_FAILED;
}
if (!create_blank) {
// Unlock the wallet
if (!wallet->Unlock(passphrase)) {
error = "Error: Wallet was encrypted but could not be unlocked";
return WalletCreationStatus::ENCRYPTION_FAILED;
}
// Set a seed for the wallet
{
LOCK(wallet->cs_wallet);
for (auto spk_man : wallet->GetActiveScriptPubKeyMans()) {
if (!spk_man->SetupGeneration()) {
error = "Unable to generate initial keys";
return WalletCreationStatus::CREATION_FAILED;
}
}
}
// Relock the wallet
wallet->Lock();
}
}
AddWallet(wallet);
wallet->postInitProcess();
result = wallet;
return WalletCreationStatus::SUCCESS;
}
const uint256 CWalletTx::ABANDON_HASH(UINT256_ONE());
/** @defgroup mapWallet
*
* @{
*/
std::string COutput::ToString() const
{
return strprintf("COutput(%s, %d, %d) [%s]", tx->GetHash().ToString(), i, nDepth, FormatMoney(tx->tx->vout[i].nValue));
}
const CWalletTx* CWallet::GetWalletTx(const uint256& hash) const
{
LOCK(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(hash);
if (it == mapWallet.end())
return nullptr;
return &(it->second);
}
void CWallet::UpgradeKeyMetadata()
{
if (IsLocked() || IsWalletFlagSet(WALLET_FLAG_KEY_ORIGIN_METADATA)) {
return;
}
auto spk_man = GetLegacyScriptPubKeyMan();
if (!spk_man) {
return;
}
spk_man->UpgradeKeyMetadata();
SetWalletFlag(WALLET_FLAG_KEY_ORIGIN_METADATA);
}
bool CWallet::Unlock(const SecureString& strWalletPassphrase, bool accept_no_keys)
{
CCrypter crypter;
CKeyingMaterial _vMasterKey;
{
LOCK(cs_wallet);
for (const MasterKeyMap::value_type& pMasterKey : mapMasterKeys)
{
if(!crypter.SetKeyFromPassphrase(strWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, _vMasterKey))
continue; // try another master key
if (Unlock(_vMasterKey, accept_no_keys)) {
// Now that we've unlocked, upgrade the key metadata
UpgradeKeyMetadata();
return true;
}
}
}
return false;
}
bool CWallet::ChangeWalletPassphrase(const SecureString& strOldWalletPassphrase, const SecureString& strNewWalletPassphrase)
{
bool fWasLocked = IsLocked();
{
LOCK(cs_wallet);
Lock();
CCrypter crypter;
CKeyingMaterial _vMasterKey;
for (MasterKeyMap::value_type& pMasterKey : mapMasterKeys)
{
if(!crypter.SetKeyFromPassphrase(strOldWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Decrypt(pMasterKey.second.vchCryptedKey, _vMasterKey))
return false;
if (Unlock(_vMasterKey))
{
int64_t nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = static_cast<unsigned int>(pMasterKey.second.nDeriveIterations * (100 / ((double)(GetTimeMillis() - nStartTime))));
nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = (pMasterKey.second.nDeriveIterations + static_cast<unsigned int>(pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime)))) / 2;
if (pMasterKey.second.nDeriveIterations < 25000)
pMasterKey.second.nDeriveIterations = 25000;
WalletLogPrintf("Wallet passphrase changed to an nDeriveIterations of %i\n", pMasterKey.second.nDeriveIterations);
if (!crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod))
return false;
if (!crypter.Encrypt(_vMasterKey, pMasterKey.second.vchCryptedKey))
return false;
WalletBatch(*database).WriteMasterKey(pMasterKey.first, pMasterKey.second);
if (fWasLocked)
Lock();
return true;
}
}
}
return false;
}
void CWallet::chainStateFlushed(const CBlockLocator& loc)
{
WalletBatch batch(*database);
batch.WriteBestBlock(loc);
}
void CWallet::SetMinVersion(enum WalletFeature nVersion, WalletBatch* batch_in, bool fExplicit)
{
LOCK(cs_wallet);
if (nWalletVersion >= nVersion)
return;
// when doing an explicit upgrade, if we pass the max version permitted, upgrade all the way
if (fExplicit && nVersion > nWalletMaxVersion)
nVersion = FEATURE_LATEST;
nWalletVersion = nVersion;
if (nVersion > nWalletMaxVersion)
nWalletMaxVersion = nVersion;
{
WalletBatch* batch = batch_in ? batch_in : new WalletBatch(*database);
if (nWalletVersion > 40000)
batch->WriteMinVersion(nWalletVersion);
if (!batch_in)
delete batch;
}
}
bool CWallet::SetMaxVersion(int nVersion)
{
LOCK(cs_wallet);
// cannot downgrade below current version
if (nWalletVersion > nVersion)
return false;
nWalletMaxVersion = nVersion;
return true;
}
std::set<uint256> CWallet::GetConflicts(const uint256& txid) const
{
std::set<uint256> result;
AssertLockHeld(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(txid);
if (it == mapWallet.end())
return result;
const CWalletTx& wtx = it->second;
std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range;
for (const CTxIn& txin : wtx.tx->vin)
{
if (mapTxSpends.count(txin.prevout) <= 1)
continue; // No conflict if zero or one spends
range = mapTxSpends.equal_range(txin.prevout);
for (TxSpends::const_iterator _it = range.first; _it != range.second; ++_it)
result.insert(_it->second);
}
return result;
}
bool CWallet::HasWalletSpend(const uint256& txid) const
{
AssertLockHeld(cs_wallet);
auto iter = mapTxSpends.lower_bound(COutPoint(txid, 0));
return (iter != mapTxSpends.end() && iter->first.hash == txid);
}
void CWallet::Flush(bool shutdown)
{
database->Flush(shutdown);
}
void CWallet::SyncMetaData(std::pair<TxSpends::iterator, TxSpends::iterator> range)
{
// We want all the wallet transactions in range to have the same metadata as
// the oldest (smallest nOrderPos).
// So: find smallest nOrderPos:
int nMinOrderPos = std::numeric_limits<int>::max();
const CWalletTx* copyFrom = nullptr;
for (TxSpends::iterator it = range.first; it != range.second; ++it) {
const CWalletTx* wtx = &mapWallet.at(it->second);
if (wtx->nOrderPos < nMinOrderPos) {
nMinOrderPos = wtx->nOrderPos;
copyFrom = wtx;
}
}
if (!copyFrom) {
return;
}
// Now copy data from copyFrom to rest:
for (TxSpends::iterator it = range.first; it != range.second; ++it)
{
const uint256& hash = it->second;
CWalletTx* copyTo = &mapWallet.at(hash);
if (copyFrom == copyTo) continue;
assert(copyFrom && "Oldest wallet transaction in range assumed to have been found.");
if (!copyFrom->IsEquivalentTo(*copyTo)) continue;
copyTo->mapValue = copyFrom->mapValue;
copyTo->vOrderForm = copyFrom->vOrderForm;
// fTimeReceivedIsTxTime not copied on purpose
// nTimeReceived not copied on purpose
copyTo->nTimeSmart = copyFrom->nTimeSmart;
copyTo->fFromMe = copyFrom->fFromMe;
// nOrderPos not copied on purpose
// cached members not copied on purpose
}
}
/**
* Outpoint is spent if any non-conflicted transaction
* spends it:
*/
bool CWallet::IsSpent(const uint256& hash, unsigned int n) const
{
const COutPoint outpoint(hash, n);
std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range;
range = mapTxSpends.equal_range(outpoint);
for (TxSpends::const_iterator it = range.first; it != range.second; ++it)
{
const uint256& wtxid = it->second;
std::map<uint256, CWalletTx>::const_iterator mit = mapWallet.find(wtxid);
if (mit != mapWallet.end()) {
int depth = mit->second.GetDepthInMainChain();
if (depth > 0 || (depth == 0 && !mit->second.isAbandoned()))
return true; // Spent
}
}
return false;
}
void CWallet::AddToSpends(const COutPoint& outpoint, const uint256& wtxid)
{
mapTxSpends.insert(std::make_pair(outpoint, wtxid));
setLockedCoins.erase(outpoint);
std::pair<TxSpends::iterator, TxSpends::iterator> range;
range = mapTxSpends.equal_range(outpoint);
SyncMetaData(range);
}
void CWallet::AddToSpends(const uint256& wtxid)
{
auto it = mapWallet.find(wtxid);
assert(it != mapWallet.end());
CWalletTx& thisTx = it->second;
if (thisTx.IsCoinBase()) // Coinbases don't spend anything!
return;
for (const CTxIn& txin : thisTx.tx->vin)
AddToSpends(txin.prevout, wtxid);
}
bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
{
if (IsCrypted())
return false;
CKeyingMaterial _vMasterKey;
_vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
GetStrongRandBytes(&_vMasterKey[0], WALLET_CRYPTO_KEY_SIZE);
CMasterKey kMasterKey;
kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
GetStrongRandBytes(&kMasterKey.vchSalt[0], WALLET_CRYPTO_SALT_SIZE);
CCrypter crypter;
int64_t nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, 25000, kMasterKey.nDerivationMethod);
kMasterKey.nDeriveIterations = static_cast<unsigned int>(2500000 / ((double)(GetTimeMillis() - nStartTime)));
nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod);
kMasterKey.nDeriveIterations = (kMasterKey.nDeriveIterations + static_cast<unsigned int>(kMasterKey.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime)))) / 2;
if (kMasterKey.nDeriveIterations < 25000)
kMasterKey.nDeriveIterations = 25000;
WalletLogPrintf("Encrypting Wallet with an nDeriveIterations of %i\n", kMasterKey.nDeriveIterations);
if (!crypter.SetKeyFromPassphrase(strWalletPassphrase, kMasterKey.vchSalt, kMasterKey.nDeriveIterations, kMasterKey.nDerivationMethod))
return false;
if (!crypter.Encrypt(_vMasterKey, kMasterKey.vchCryptedKey))
return false;
{
LOCK(cs_wallet);
mapMasterKeys[++nMasterKeyMaxID] = kMasterKey;
WalletBatch* encrypted_batch = new WalletBatch(*database);
if (!encrypted_batch->TxnBegin()) {
delete encrypted_batch;
encrypted_batch = nullptr;
return false;
}
encrypted_batch->WriteMasterKey(nMasterKeyMaxID, kMasterKey);
for (const auto& spk_man_pair : m_spk_managers) {
auto spk_man = spk_man_pair.second.get();
if (!spk_man->Encrypt(_vMasterKey, encrypted_batch)) {
encrypted_batch->TxnAbort();
delete encrypted_batch;
encrypted_batch = nullptr;
// We now probably have half of our keys encrypted in memory, and half not...
// die and let the user reload the unencrypted wallet.
assert(false);
}
}
// Encryption was introduced in version 0.4.0
SetMinVersion(FEATURE_WALLETCRYPT, encrypted_batch, true);
if (!encrypted_batch->TxnCommit()) {
delete encrypted_batch;
encrypted_batch = nullptr;
// We now have keys encrypted in memory, but not on disk...
// die to avoid confusion and let the user reload the unencrypted wallet.
assert(false);
}
delete encrypted_batch;
encrypted_batch = nullptr;
Lock();
Unlock(strWalletPassphrase);
// if we are using HD, replace the HD seed with a new one
if (auto spk_man = GetLegacyScriptPubKeyMan()) {
if (spk_man->IsHDEnabled()) {
if (!spk_man->SetupGeneration(true)) {
return false;
}
}
}
Lock();
// Need to completely rewrite the wallet file; if we don't, bdb might keep
// bits of the unencrypted private key in slack space in the database file.
database->Rewrite();
// BDB seems to have a bad habit of writing old data into
// slack space in .dat files; that is bad if the old data is
// unencrypted private keys. So:
database->ReloadDbEnv();
}
NotifyStatusChanged(this);
return true;
}
DBErrors CWallet::ReorderTransactions()
{
LOCK(cs_wallet);
WalletBatch batch(*database);
// Old wallets didn't have any defined order for transactions
// Probably a bad idea to change the output of this
// First: get all CWalletTx into a sorted-by-time multimap.
typedef std::multimap<int64_t, CWalletTx*> TxItems;
TxItems txByTime;
for (auto& entry : mapWallet)
{
CWalletTx* wtx = &entry.second;
txByTime.insert(std::make_pair(wtx->nTimeReceived, wtx));
}
nOrderPosNext = 0;
std::vector<int64_t> nOrderPosOffsets;
for (TxItems::iterator it = txByTime.begin(); it != txByTime.end(); ++it)
{
CWalletTx *const pwtx = (*it).second;
int64_t& nOrderPos = pwtx->nOrderPos;
if (nOrderPos == -1)
{
nOrderPos = nOrderPosNext++;
nOrderPosOffsets.push_back(nOrderPos);
if (!batch.WriteTx(*pwtx))
return DBErrors::LOAD_FAIL;
}
else
{
int64_t nOrderPosOff = 0;
for (const int64_t& nOffsetStart : nOrderPosOffsets)
{
if (nOrderPos >= nOffsetStart)
++nOrderPosOff;
}
nOrderPos += nOrderPosOff;
nOrderPosNext = std::max(nOrderPosNext, nOrderPos + 1);
if (!nOrderPosOff)
continue;
// Since we're changing the order, write it back
if (!batch.WriteTx(*pwtx))
return DBErrors::LOAD_FAIL;
}
}
batch.WriteOrderPosNext(nOrderPosNext);
return DBErrors::LOAD_OK;
}
int64_t CWallet::IncOrderPosNext(WalletBatch* batch)
{
AssertLockHeld(cs_wallet);
int64_t nRet = nOrderPosNext++;
if (batch) {
batch->WriteOrderPosNext(nOrderPosNext);
} else {
WalletBatch(*database).WriteOrderPosNext(nOrderPosNext);
}
return nRet;
}
void CWallet::MarkDirty()
{
{
LOCK(cs_wallet);
for (std::pair<const uint256, CWalletTx>& item : mapWallet)
item.second.MarkDirty();
}
}
bool CWallet::MarkReplaced(const uint256& originalHash, const uint256& newHash)
{
LOCK(cs_wallet);
auto mi = mapWallet.find(originalHash);
// There is a bug if MarkReplaced is not called on an existing wallet transaction.
assert(mi != mapWallet.end());
CWalletTx& wtx = (*mi).second;
// Ensure for now that we're not overwriting data
assert(wtx.mapValue.count("replaced_by_txid") == 0);
wtx.mapValue["replaced_by_txid"] = newHash.ToString();
WalletBatch batch(*database, "r+");
bool success = true;
if (!batch.WriteTx(wtx)) {
WalletLogPrintf("%s: Updating batch tx %s failed\n", __func__, wtx.GetHash().ToString());
success = false;
}
NotifyTransactionChanged(this, originalHash, CT_UPDATED);
return success;
}
void CWallet::SetSpentKeyState(WalletBatch& batch, const uint256& hash, unsigned int n, bool used, std::set<CTxDestination>& tx_destinations)
{
AssertLockHeld(cs_wallet);
const CWalletTx* srctx = GetWalletTx(hash);
if (!srctx) return;
CTxDestination dst;
if (ExtractDestination(srctx->tx->vout[n].scriptPubKey, dst)) {
if (IsMine(dst)) {
if (used && !GetDestData(dst, "used", nullptr)) {
if (AddDestData(batch, dst, "used", "p")) { // p for "present", opposite of absent (null)
tx_destinations.insert(dst);
}
} else if (!used && GetDestData(dst, "used", nullptr)) {
EraseDestData(batch, dst, "used");
}
}
}
}
bool CWallet::IsSpentKey(const uint256& hash, unsigned int n) const
{
AssertLockHeld(cs_wallet);
CTxDestination dst;
const CWalletTx* srctx = GetWalletTx(hash);
if (srctx) {
assert(srctx->tx->vout.size() > n);
LegacyScriptPubKeyMan* spk_man = GetLegacyScriptPubKeyMan();
// When descriptor wallets arrive, these additional checks are
// likely superfluous and can be optimized out
assert(spk_man != nullptr);
for (const auto& keyid : GetAffectedKeys(srctx->tx->vout[n].scriptPubKey, *spk_man)) {
WitnessV0KeyHash wpkh_dest(keyid);
if (GetDestData(wpkh_dest, "used", nullptr)) {
return true;
}
ScriptHash sh_wpkh_dest(GetScriptForDestination(wpkh_dest));
if (GetDestData(sh_wpkh_dest, "used", nullptr)) {
return true;
}
PKHash pkh_dest(keyid);
if (GetDestData(pkh_dest, "used", nullptr)) {
return true;
}
}
}
return false;
}
bool CWallet::AddToWallet(const CWalletTx& wtxIn, bool fFlushOnClose)
{
LOCK(cs_wallet);
WalletBatch batch(*database, "r+", fFlushOnClose);
uint256 hash = wtxIn.GetHash();
if (IsWalletFlagSet(WALLET_FLAG_AVOID_REUSE)) {
// Mark used destinations
std::set<CTxDestination> tx_destinations;
for (const CTxIn& txin : wtxIn.tx->vin) {
const COutPoint& op = txin.prevout;
SetSpentKeyState(batch, op.hash, op.n, true, tx_destinations);
}
MarkDestinationsDirty(tx_destinations);
}
// Inserts only if not already there, returns tx inserted or tx found
std::pair<std::map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(std::make_pair(hash, wtxIn));
CWalletTx& wtx = (*ret.first).second;
wtx.BindWallet(this);
bool fInsertedNew = ret.second;
if (fInsertedNew) {
wtx.nTimeReceived = chain().getAdjustedTime();
wtx.nOrderPos = IncOrderPosNext(&batch);
wtx.m_it_wtxOrdered = wtxOrdered.insert(std::make_pair(wtx.nOrderPos, &wtx));
wtx.nTimeSmart = ComputeTimeSmart(wtx);
AddToSpends(hash);
}
bool fUpdated = false;
if (!fInsertedNew)
{
if (wtxIn.m_confirm.status != wtx.m_confirm.status) {
wtx.m_confirm.status = wtxIn.m_confirm.status;
wtx.m_confirm.nIndex = wtxIn.m_confirm.nIndex;
wtx.m_confirm.hashBlock = wtxIn.m_confirm.hashBlock;
wtx.m_confirm.block_height = wtxIn.m_confirm.block_height;
fUpdated = true;
} else {
assert(wtx.m_confirm.nIndex == wtxIn.m_confirm.nIndex);
assert(wtx.m_confirm.hashBlock == wtxIn.m_confirm.hashBlock);
assert(wtx.m_confirm.block_height == wtxIn.m_confirm.block_height);
}
if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
{
wtx.fFromMe = wtxIn.fFromMe;
fUpdated = true;
}
// If we have a witness-stripped version of this transaction, and we
// see a new version with a witness, then we must be upgrading a pre-segwit
// wallet. Store the new version of the transaction with the witness,
// as the stripped-version must be invalid.
// TODO: Store all versions of the transaction, instead of just one.
if (wtxIn.tx->HasWitness() && !wtx.tx->HasWitness()) {
wtx.SetTx(wtxIn.tx);
fUpdated = true;
}
}
//// debug print
WalletLogPrintf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
// Write to disk
if (fInsertedNew || fUpdated)
if (!batch.WriteTx(wtx))
return false;
// Break debit/credit balance caches:
wtx.MarkDirty();
// Notify UI of new or updated transaction
NotifyTransactionChanged(this, hash, fInsertedNew ? CT_NEW : CT_UPDATED);
#if HAVE_SYSTEM
// notify an external script when a wallet transaction comes in or is updated
std::string strCmd = gArgs.GetArg("-walletnotify", "");
if (!strCmd.empty())
{
boost::replace_all(strCmd, "%s", wtxIn.GetHash().GetHex());
#ifndef WIN32
// Substituting the wallet name isn't currently supported on windows
// because windows shell escaping has not been implemented yet:
// https://github.com/bitcoin/bitcoin/pull/13339#issuecomment-537384875
// A few ways it could be implemented in the future are described in:
// https://github.com/bitcoin/bitcoin/pull/13339#issuecomment-461288094
boost::replace_all(strCmd, "%w", ShellEscape(GetName()));
#endif
std::thread t(runCommand, strCmd);
t.detach(); // thread runs free
}
#endif
return true;
}
void CWallet::LoadToWallet(CWalletTx& wtxIn)
{
// If wallet doesn't have a chain (e.g bitcoin-wallet), lock can't be taken.
auto locked_chain = LockChain();
if (locked_chain) {
Optional<int> block_height = locked_chain->getBlockHeight(wtxIn.m_confirm.hashBlock);
if (block_height) {
// Update cached block height variable since it not stored in the
// serialized transaction.
wtxIn.m_confirm.block_height = *block_height;
} else if (wtxIn.isConflicted() || wtxIn.isConfirmed()) {
// If tx block (or conflicting block) was reorged out of chain
// while the wallet was shutdown, change tx status to UNCONFIRMED
// and reset block height, hash, and index. ABANDONED tx don't have
// associated blocks and don't need to be updated. The case where a
// transaction was reorged out while online and then reconfirmed
// while offline is covered by the rescan logic.
wtxIn.setUnconfirmed();
wtxIn.m_confirm.hashBlock = uint256();
wtxIn.m_confirm.block_height = 0;
wtxIn.m_confirm.nIndex = 0;
}
}
uint256 hash = wtxIn.GetHash();
const auto& ins = mapWallet.emplace(hash, wtxIn);
CWalletTx& wtx = ins.first->second;
wtx.BindWallet(this);
if (/* insertion took place */ ins.second) {
wtx.m_it_wtxOrdered = wtxOrdered.insert(std::make_pair(wtx.nOrderPos, &wtx));
}
AddToSpends(hash);
for (const CTxIn& txin : wtx.tx->vin) {
auto it = mapWallet.find(txin.prevout.hash);
if (it != mapWallet.end()) {
CWalletTx& prevtx = it->second;
if (prevtx.isConflicted()) {
MarkConflicted(prevtx.m_confirm.hashBlock, prevtx.m_confirm.block_height, wtx.GetHash());
}
}
}
}
bool CWallet::AddToWalletIfInvolvingMe(const CTransactionRef& ptx, CWalletTx::Confirmation confirm, bool fUpdate)
{
const CTransaction& tx = *ptx;
{
AssertLockHeld(cs_wallet);
if (!confirm.hashBlock.IsNull()) {
for (const CTxIn& txin : tx.vin) {
std::pair<TxSpends::const_iterator, TxSpends::const_iterator> range = mapTxSpends.equal_range(txin.prevout);
while (range.first != range.second) {
if (range.first->second != tx.GetHash()) {
WalletLogPrintf("Transaction %s (in block %s) conflicts with wallet transaction %s (both spend %s:%i)\n", tx.GetHash().ToString(), confirm.hashBlock.ToString(), range.first->second.ToString(), range.first->first.hash.ToString(), range.first->first.n);
MarkConflicted(confirm.hashBlock, confirm.block_height, range.first->second);
}
range.first++;
}
}
}
bool fExisted = mapWallet.count(tx.GetHash()) != 0;
if (fExisted && !fUpdate) return false;
if (fExisted || IsMine(tx) || IsFromMe(tx))
{
/* Check if any keys in the wallet keypool that were supposed to be unused
* have appeared in a new transaction. If so, remove those keys from the keypool.
* This can happen when restoring an old wallet backup that does not contain
* the mostly recently created transactions from newer versions of the wallet.
*/
// loop though all outputs
for (const CTxOut& txout: tx.vout) {
for (const auto& spk_man_pair : m_spk_managers) {
spk_man_pair.second->MarkUnusedAddresses(txout.scriptPubKey);
}
}
CWalletTx wtx(this, ptx);
// Block disconnection override an abandoned tx as unconfirmed
// which means user may have to call abandontransaction again
wtx.m_confirm = confirm;
return AddToWallet(wtx, false);
}
}
return false;
}
bool CWallet::TransactionCanBeAbandoned(const uint256& hashTx) const
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
const CWalletTx* wtx = GetWalletTx(hashTx);
return wtx && !wtx->isAbandoned() && wtx->GetDepthInMainChain() == 0 && !wtx->InMempool();
}
void CWallet::MarkInputsDirty(const CTransactionRef& tx)
{
for (const CTxIn& txin : tx->vin) {
auto it = mapWallet.find(txin.prevout.hash);
if (it != mapWallet.end()) {
it->second.MarkDirty();
}
}
}
bool CWallet::AbandonTransaction(const uint256& hashTx)
{
auto locked_chain = chain().lock(); // Temporary. Removed in upcoming lock cleanup
LOCK(cs_wallet);
WalletBatch batch(*database, "r+");
std::set<uint256> todo;
std::set<uint256> done;
// Can't mark abandoned if confirmed or in mempool
auto it = mapWallet.find(hashTx);
assert(it != mapWallet.end());
CWalletTx& origtx = it->second;
if (origtx.GetDepthInMainChain() != 0 || origtx.InMempool()) {
return false;
}
todo.insert(hashTx);
while (!todo.empty()) {
uint256 now = *todo.begin();
todo.erase(now);
done.insert(now);
auto it = mapWallet.find(now);
assert(it != mapWallet.end());
CWalletTx& wtx = it->second;
int currentconfirm = wtx.GetDepthInMainChain();
// If the orig tx was not in block, none of its spends can be
assert(currentconfirm <= 0);
// if (currentconfirm < 0) {Tx and spends are already conflicted, no need to abandon}
if (currentconfirm == 0 && !wtx.isAbandoned()) {
// If the orig tx was not in block/mempool, none of its spends can be in mempool
assert(!wtx.InMempool());
wtx.setAbandoned();
wtx.MarkDirty();
batch.WriteTx(wtx);
NotifyTransactionChanged(this, wtx.GetHash(), CT_UPDATED);
// Iterate over all its outputs, and mark transactions in the wallet that spend them abandoned too
TxSpends::const_iterator iter = mapTxSpends.lower_bound(COutPoint(now, 0));
while (iter != mapTxSpends.end() && iter->first.hash == now) {
if (!done.count(iter->second)) {
todo.insert(iter->second);
}
iter++;
}
// If a transaction changes 'conflicted' state, that changes the balance
// available of the outputs it spends. So force those to be recomputed
MarkInputsDirty(wtx.tx);
}
}
return true;
}
void CWallet::MarkConflicted(const uint256& hashBlock, int conflicting_height, const uint256& hashTx)
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
int conflictconfirms = (m_last_block_processed_height - conflicting_height + 1) * -1;
// If number of conflict confirms cannot be determined, this means
// that the block is still unknown or not yet part of the main chain,
// for example when loading the wallet during a reindex. Do nothing in that
// case.
if (conflictconfirms >= 0)
return;
// Do not flush the wallet here for performance reasons
WalletBatch batch(*database, "r+", false);
std::set<uint256> todo;
std::set<uint256> done;
todo.insert(hashTx);
while (!todo.empty()) {
uint256 now = *todo.begin();
todo.erase(now);
done.insert(now);
auto it = mapWallet.find(now);
assert(it != mapWallet.end());
CWalletTx& wtx = it->second;
int currentconfirm = wtx.GetDepthInMainChain();
if (conflictconfirms < currentconfirm) {
// Block is 'more conflicted' than current confirm; update.
// Mark transaction as conflicted with this block.
wtx.m_confirm.nIndex = 0;
wtx.m_confirm.hashBlock = hashBlock;
wtx.m_confirm.block_height = conflicting_height;
wtx.setConflicted();
wtx.MarkDirty();
batch.WriteTx(wtx);
// Iterate over all its outputs, and mark transactions in the wallet that spend them conflicted too
TxSpends::const_iterator iter = mapTxSpends.lower_bound(COutPoint(now, 0));
while (iter != mapTxSpends.end() && iter->first.hash == now) {
if (!done.count(iter->second)) {
todo.insert(iter->second);
}
iter++;
}
// If a transaction changes 'conflicted' state, that changes the balance
// available of the outputs it spends. So force those to be recomputed
MarkInputsDirty(wtx.tx);
}
}
}
void CWallet::SyncTransaction(const CTransactionRef& ptx, CWalletTx::Confirmation confirm, bool update_tx)
{
if (!AddToWalletIfInvolvingMe(ptx, confirm, update_tx))
return; // Not one of ours
// If a transaction changes 'conflicted' state, that changes the balance
// available of the outputs it spends. So force those to be
// recomputed, also:
MarkInputsDirty(ptx);
}
void CWallet::transactionAddedToMempool(const CTransactionRef& ptx) {
auto locked_chain = chain().lock();
LOCK(cs_wallet);
CWalletTx::Confirmation confirm(CWalletTx::Status::UNCONFIRMED, /* block_height */ 0, {}, /* nIndex */ 0);
SyncTransaction(ptx, confirm);
auto it = mapWallet.find(ptx->GetHash());
if (it != mapWallet.end()) {
it->second.fInMempool = true;
}
}
void CWallet::transactionRemovedFromMempool(const CTransactionRef &ptx) {
LOCK(cs_wallet);
auto it = mapWallet.find(ptx->GetHash());
if (it != mapWallet.end()) {
it->second.fInMempool = false;
}
}
void CWallet::blockConnected(const CBlock& block, int height)
{
const uint256& block_hash = block.GetHash();
auto locked_chain = chain().lock();
LOCK(cs_wallet);
m_last_block_processed_height = height;
m_last_block_processed = block_hash;
for (size_t index = 0; index < block.vtx.size(); index++) {
CWalletTx::Confirmation confirm(CWalletTx::Status::CONFIRMED, height, block_hash, index);
SyncTransaction(block.vtx[index], confirm);
transactionRemovedFromMempool(block.vtx[index]);
}
}
void CWallet::blockDisconnected(const CBlock& block, int height)
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
// At block disconnection, this will change an abandoned transaction to
// be unconfirmed, whether or not the transaction is added back to the mempool.
// User may have to call abandontransaction again. It may be addressed in the
// future with a stickier abandoned state or even removing abandontransaction call.
m_last_block_processed_height = height - 1;
m_last_block_processed = block.hashPrevBlock;
for (const CTransactionRef& ptx : block.vtx) {
CWalletTx::Confirmation confirm(CWalletTx::Status::UNCONFIRMED, /* block_height */ 0, {}, /* nIndex */ 0);
SyncTransaction(ptx, confirm);
}
}
void CWallet::updatedBlockTip()
{
m_best_block_time = GetTime();
}
void CWallet::BlockUntilSyncedToCurrentChain() const {
AssertLockNotHeld(cs_wallet);
// Skip the queue-draining stuff if we know we're caught up with
// ::ChainActive().Tip(), otherwise put a callback in the validation interface queue and wait
// for the queue to drain enough to execute it (indicating we are caught up
// at least with the time we entered this function).
uint256 last_block_hash = WITH_LOCK(cs_wallet, return m_last_block_processed);
chain().waitForNotificationsIfTipChanged(last_block_hash);
}
isminetype CWallet::IsMine(const CTxIn &txin) const
{
{
LOCK(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
if (mi != mapWallet.end())
{
const CWalletTx& prev = (*mi).second;
if (txin.prevout.n < prev.tx->vout.size())
return IsMine(prev.tx->vout[txin.prevout.n]);
}
}
return ISMINE_NO;
}
// Note that this function doesn't distinguish between a 0-valued input,
// and a not-"is mine" (according to the filter) input.
CAmount CWallet::GetDebit(const CTxIn &txin, const isminefilter& filter) const
{
{
LOCK(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(txin.prevout.hash);
if (mi != mapWallet.end())
{
const CWalletTx& prev = (*mi).second;
if (txin.prevout.n < prev.tx->vout.size())
if (IsMine(prev.tx->vout[txin.prevout.n]) & filter)
return prev.tx->vout[txin.prevout.n].nValue;
}
}
return 0;
}
isminetype CWallet::IsMine(const CTxOut& txout) const
{
return IsMine(txout.scriptPubKey);
}
isminetype CWallet::IsMine(const CTxDestination& dest) const
{
return IsMine(GetScriptForDestination(dest));
}
isminetype CWallet::IsMine(const CScript& script) const
{
isminetype result = ISMINE_NO;
for (const auto& spk_man_pair : m_spk_managers) {
result = std::max(result, spk_man_pair.second->IsMine(script));
}
return result;
}
CAmount CWallet::GetCredit(const CTxOut& txout, const isminefilter& filter) const
{
if (!MoneyRange(txout.nValue))
throw std::runtime_error(std::string(__func__) + ": value out of range");
return ((IsMine(txout) & filter) ? txout.nValue : 0);
}
bool CWallet::IsChange(const CTxOut& txout) const
{
return IsChange(txout.scriptPubKey);
}
bool CWallet::IsChange(const CScript& script) const
{
// TODO: fix handling of 'change' outputs. The assumption is that any
// payment to a script that is ours, but is not in the address book
// is change. That assumption is likely to break when we implement multisignature
// wallets that return change back into a multi-signature-protected address;
// a better way of identifying which outputs are 'the send' and which are
// 'the change' will need to be implemented (maybe extend CWalletTx to remember
// which output, if any, was change).
if (IsMine(script))
{
CTxDestination address;
if (!ExtractDestination(script, address))
return true;
LOCK(cs_wallet);
if (!FindAddressBookEntry(address)) {
return true;
}
}
return false;
}
CAmount CWallet::GetChange(const CTxOut& txout) const
{
if (!MoneyRange(txout.nValue))
throw std::runtime_error(std::string(__func__) + ": value out of range");
return (IsChange(txout) ? txout.nValue : 0);
}
bool CWallet::IsMine(const CTransaction& tx) const
{
for (const CTxOut& txout : tx.vout)
if (IsMine(txout))
return true;
return false;
}
bool CWallet::IsFromMe(const CTransaction& tx) const
{
return (GetDebit(tx, ISMINE_ALL) > 0);
}
CAmount CWallet::GetDebit(const CTransaction& tx, const isminefilter& filter) const
{
CAmount nDebit = 0;
for (const CTxIn& txin : tx.vin)
{
nDebit += GetDebit(txin, filter);
if (!MoneyRange(nDebit))
throw std::runtime_error(std::string(__func__) + ": value out of range");
}
return nDebit;
}
bool CWallet::IsAllFromMe(const CTransaction& tx, const isminefilter& filter) const
{
LOCK(cs_wallet);
for (const CTxIn& txin : tx.vin)
{
auto mi = mapWallet.find(txin.prevout.hash);
if (mi == mapWallet.end())
return false; // any unknown inputs can't be from us
const CWalletTx& prev = (*mi).second;
if (txin.prevout.n >= prev.tx->vout.size())
return false; // invalid input!
if (!(IsMine(prev.tx->vout[txin.prevout.n]) & filter))
return false;
}
return true;
}
CAmount CWallet::GetCredit(const CTransaction& tx, const isminefilter& filter) const
{
CAmount nCredit = 0;
for (const CTxOut& txout : tx.vout)
{
nCredit += GetCredit(txout, filter);
if (!MoneyRange(nCredit))
throw std::runtime_error(std::string(__func__) + ": value out of range");
}
return nCredit;
}
CAmount CWallet::GetChange(const CTransaction& tx) const
{
CAmount nChange = 0;
for (const CTxOut& txout : tx.vout)
{
nChange += GetChange(txout);
if (!MoneyRange(nChange))
throw std::runtime_error(std::string(__func__) + ": value out of range");
}
return nChange;
}
bool CWallet::IsHDEnabled() const
{
bool result = true;
for (const auto& spk_man_pair : m_spk_managers) {
result &= spk_man_pair.second->IsHDEnabled();
}
return result;
}
bool CWallet::CanGetAddresses(bool internal) const
{
LOCK(cs_wallet);
if (m_spk_managers.empty()) return false;
for (OutputType t : OUTPUT_TYPES) {
auto spk_man = GetScriptPubKeyMan(t, internal);
if (spk_man && spk_man->CanGetAddresses(internal)) {
return true;
}
}
return false;
}
void CWallet::SetWalletFlag(uint64_t flags)
{
LOCK(cs_wallet);
m_wallet_flags |= flags;
if (!WalletBatch(*database).WriteWalletFlags(m_wallet_flags))
throw std::runtime_error(std::string(__func__) + ": writing wallet flags failed");
}
void CWallet::UnsetWalletFlag(uint64_t flag)
{
WalletBatch batch(*database);
UnsetWalletFlagWithDB(batch, flag);
}
void CWallet::UnsetWalletFlagWithDB(WalletBatch& batch, uint64_t flag)
{
LOCK(cs_wallet);
m_wallet_flags &= ~flag;
if (!batch.WriteWalletFlags(m_wallet_flags))
throw std::runtime_error(std::string(__func__) + ": writing wallet flags failed");
}
void CWallet::UnsetBlankWalletFlag(WalletBatch& batch)
{
UnsetWalletFlagWithDB(batch, WALLET_FLAG_BLANK_WALLET);
}
bool CWallet::IsWalletFlagSet(uint64_t flag) const
{
return (m_wallet_flags & flag);
}
bool CWallet::SetWalletFlags(uint64_t overwriteFlags, bool memonly)
{
LOCK(cs_wallet);
m_wallet_flags = overwriteFlags;
if (((overwriteFlags & KNOWN_WALLET_FLAGS) >> 32) ^ (overwriteFlags >> 32)) {
// contains unknown non-tolerable wallet flags
return false;
}
if (!memonly && !WalletBatch(*database).WriteWalletFlags(m_wallet_flags)) {
throw std::runtime_error(std::string(__func__) + ": writing wallet flags failed");
}
return true;
}
int64_t CWalletTx::GetTxTime() const
{
int64_t n = nTimeSmart;
return n ? n : nTimeReceived;
}
// Helper for producing a max-sized low-S low-R signature (eg 71 bytes)
// or a max-sized low-S signature (e.g. 72 bytes) if use_max_sig is true
bool CWallet::DummySignInput(CTxIn &tx_in, const CTxOut &txout, bool use_max_sig) const
{
// Fill in dummy signatures for fee calculation.
const CScript& scriptPubKey = txout.scriptPubKey;
SignatureData sigdata;
std::unique_ptr<SigningProvider> provider = GetSolvingProvider(scriptPubKey);
if (!provider) {
// We don't know about this scriptpbuKey;
return false;
}
if (!ProduceSignature(*provider, use_max_sig ? DUMMY_MAXIMUM_SIGNATURE_CREATOR : DUMMY_SIGNATURE_CREATOR, scriptPubKey, sigdata)) {
return false;
}
UpdateInput(tx_in, sigdata);
return true;
}
// Helper for producing a bunch of max-sized low-S low-R signatures (eg 71 bytes)
bool CWallet::DummySignTx(CMutableTransaction &txNew, const std::vector<CTxOut> &txouts, bool use_max_sig) const
{
// Fill in dummy signatures for fee calculation.
int nIn = 0;
for (const auto& txout : txouts)
{
if (!DummySignInput(txNew.vin[nIn], txout, use_max_sig)) {
return false;
}
nIn++;
}
return true;
}
bool CWallet::ImportScripts(const std::set<CScript> scripts, int64_t timestamp)
{
auto spk_man = GetLegacyScriptPubKeyMan();
if (!spk_man) {
return false;
}
LOCK(spk_man->cs_KeyStore);
return spk_man->ImportScripts(scripts, timestamp);
}
bool CWallet::ImportPrivKeys(const std::map<CKeyID, CKey>& privkey_map, const int64_t timestamp)
{
auto spk_man = GetLegacyScriptPubKeyMan();
if (!spk_man) {
return false;
}
LOCK(spk_man->cs_KeyStore);
return spk_man->ImportPrivKeys(privkey_map, timestamp);
}
bool CWallet::ImportPubKeys(const std::vector<CKeyID>& ordered_pubkeys, const std::map<CKeyID, CPubKey>& pubkey_map, const std::map<CKeyID, std::pair<CPubKey, KeyOriginInfo>>& key_origins, const bool add_keypool, const bool internal, const int64_t timestamp)
{
auto spk_man = GetLegacyScriptPubKeyMan();
if (!spk_man) {
return false;
}
LOCK(spk_man->cs_KeyStore);
return spk_man->ImportPubKeys(ordered_pubkeys, pubkey_map, key_origins, add_keypool, internal, timestamp);
}
bool CWallet::ImportScriptPubKeys(const std::string& label, const std::set<CScript>& script_pub_keys, const bool have_solving_data, const bool apply_label, const int64_t timestamp)
{
auto spk_man = GetLegacyScriptPubKeyMan();
if (!spk_man) {
return false;
}
LOCK(spk_man->cs_KeyStore);
if (!spk_man->ImportScriptPubKeys(script_pub_keys, have_solving_data, timestamp)) {
return false;
}
if (apply_label) {
WalletBatch batch(*database);
for (const CScript& script : script_pub_keys) {
CTxDestination dest;
ExtractDestination(script, dest);
if (IsValidDestination(dest)) {
SetAddressBookWithDB(batch, dest, label, "receive");
}
}
}
return true;
}
int64_t CalculateMaximumSignedTxSize(const CTransaction &tx, const CWallet *wallet, bool use_max_sig)
{
std::vector<CTxOut> txouts;
for (const CTxIn& input : tx.vin) {
const auto mi = wallet->mapWallet.find(input.prevout.hash);
// Can not estimate size without knowing the input details
if (mi == wallet->mapWallet.end()) {
return -1;
}
assert(input.prevout.n < mi->second.tx->vout.size());
txouts.emplace_back(mi->second.tx->vout[input.prevout.n]);
}
return CalculateMaximumSignedTxSize(tx, wallet, txouts, use_max_sig);
}
// txouts needs to be in the order of tx.vin
int64_t CalculateMaximumSignedTxSize(const CTransaction &tx, const CWallet *wallet, const std::vector<CTxOut>& txouts, bool use_max_sig)
{
CMutableTransaction txNew(tx);
if (!wallet->DummySignTx(txNew, txouts, use_max_sig)) {
return -1;
}
return GetVirtualTransactionSize(CTransaction(txNew));
}
int CalculateMaximumSignedInputSize(const CTxOut& txout, const CWallet* wallet, bool use_max_sig)
{
CMutableTransaction txn;
txn.vin.push_back(CTxIn(COutPoint()));
if (!wallet->DummySignInput(txn.vin[0], txout, use_max_sig)) {
return -1;
}
return GetVirtualTransactionInputSize(txn.vin[0]);
}
void CWalletTx::GetAmounts(std::list<COutputEntry>& listReceived,
std::list<COutputEntry>& listSent, CAmount& nFee, const isminefilter& filter) const
{
nFee = 0;
listReceived.clear();
listSent.clear();
// Compute fee:
CAmount nDebit = GetDebit(filter);
if (nDebit > 0) // debit>0 means we signed/sent this transaction
{
CAmount nValueOut = tx->GetValueOut();
nFee = nDebit - nValueOut;
}
// Sent/received.
for (unsigned int i = 0; i < tx->vout.size(); ++i)
{
const CTxOut& txout = tx->vout[i];
isminetype fIsMine = pwallet->IsMine(txout);
// Only need to handle txouts if AT LEAST one of these is true:
// 1) they debit from us (sent)
// 2) the output is to us (received)
if (nDebit > 0)
{
// Don't report 'change' txouts
if (pwallet->IsChange(txout))
continue;
}
else if (!(fIsMine & filter))
continue;
// In either case, we need to get the destination address
CTxDestination address;
if (!ExtractDestination(txout.scriptPubKey, address) && !txout.scriptPubKey.IsUnspendable())
{
pwallet->WalletLogPrintf("CWalletTx::GetAmounts: Unknown transaction type found, txid %s\n",
this->GetHash().ToString());
address = CNoDestination();
}
COutputEntry output = {address, txout.nValue, (int)i};
// If we are debited by the transaction, add the output as a "sent" entry
if (nDebit > 0)
listSent.push_back(output);
// If we are receiving the output, add it as a "received" entry
if (fIsMine & filter)
listReceived.push_back(output);
}
}
/**
* Scan active chain for relevant transactions after importing keys. This should
* be called whenever new keys are added to the wallet, with the oldest key
* creation time.
*
* @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, const WalletRescanReserver& reserver, bool update)
{
// 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.
uint256 start_block;
{
auto locked_chain = chain().lock();
const Optional<int> start_height = locked_chain->findFirstBlockWithTimeAndHeight(startTime - TIMESTAMP_WINDOW, 0, &start_block);
const Optional<int> tip_height = locked_chain->getHeight();
WalletLogPrintf("%s: Rescanning last %i blocks\n", __func__, tip_height && start_height ? *tip_height - *start_height + 1 : 0);
}
if (!start_block.IsNull()) {
// TODO: this should take into account failure by ScanResult::USER_ABORT
ScanResult result = ScanForWalletTransactions(start_block, {} /* stop_block */, reserver, update);
if (result.status == ScanResult::FAILURE) {
int64_t time_max;
if (!chain().findBlock(result.last_failed_block, nullptr /* block */, nullptr /* time */, &time_max)) {
throw std::logic_error("ScanForWalletTransactions returned invalid block hash");
}
return time_max + TIMESTAMP_WINDOW + 1;
}
}
return startTime;
}
/**
* Scan the block chain (starting in start_block) for transactions
* from or to us. If fUpdate is true, found transactions that already
* exist in the wallet will be updated.
*
* @param[in] start_block Scan starting block. If block is not on the active
* chain, the scan will return SUCCESS immediately.
* @param[in] stop_block Scan ending block. If block is not on the active
* chain, the scan will continue until it reaches the
* chain tip.
*
* @return ScanResult returning scan information and indicating success or
* failure. Return status will be set to SUCCESS if scan was
* successful. FAILURE if a complete rescan was not possible (due to
* pruning or corruption). USER_ABORT if the rescan was aborted before
* it could complete.
*
* @pre Caller needs to make sure start_block (and the optional stop_block) are on
* the main chain after to the addition of any new keys you want to detect
* transactions for.
*/
CWallet::ScanResult CWallet::ScanForWalletTransactions(const uint256& start_block, const uint256& stop_block, const WalletRescanReserver& reserver, bool fUpdate)
{
int64_t nNow = GetTime();
int64_t start_time = GetTimeMillis();
assert(reserver.isReserved());
uint256 block_hash = start_block;
ScanResult result;
WalletLogPrintf("Rescan started from block %s...\n", start_block.ToString());
fAbortRescan = false;
ShowProgress(strprintf("%s " + _("Rescanning...").translated, GetDisplayName()), 0); // show rescan progress in GUI as dialog or on splashscreen, if -rescan on startup
uint256 tip_hash;
// The way the 'block_height' is initialized is just a workaround for the gcc bug #47679 since version 4.6.0.
Optional<int> block_height = MakeOptional(false, int());
double progress_begin;
double progress_end;
{
auto locked_chain = chain().lock();
if (Optional<int> tip_height = locked_chain->getHeight()) {
tip_hash = locked_chain->getBlockHash(*tip_height);
}
block_height = locked_chain->getBlockHeight(block_hash);
progress_begin = chain().guessVerificationProgress(block_hash);
progress_end = chain().guessVerificationProgress(stop_block.IsNull() ? tip_hash : stop_block);
}
double progress_current = progress_begin;
while (block_height && !fAbortRescan && !chain().shutdownRequested()) {
m_scanning_progress = (progress_current - progress_begin) / (progress_end - progress_begin);
if (*block_height % 100 == 0 && progress_end - progress_begin > 0.0) {
ShowProgress(strprintf("%s " + _("Rescanning...").translated, GetDisplayName()), std::max(1, std::min(99, (int)(m_scanning_progress * 100))));
}
if (GetTime() >= nNow + 60) {
nNow = GetTime();
WalletLogPrintf("Still rescanning. At block %d. Progress=%f\n", *block_height, progress_current);
}
CBlock block;
if (chain().findBlock(block_hash, &block) && !block.IsNull()) {
auto locked_chain = chain().lock();
LOCK(cs_wallet);
if (!locked_chain->getBlockHeight(block_hash)) {
// Abort scan if current block is no longer active, to prevent
// marking transactions as coming from the wrong block.
// TODO: This should return success instead of failure, see
// https://github.com/bitcoin/bitcoin/pull/14711#issuecomment-458342518
result.last_failed_block = block_hash;
result.status = ScanResult::FAILURE;
break;
}
for (size_t posInBlock = 0; posInBlock < block.vtx.size(); ++posInBlock) {
CWalletTx::Confirmation confirm(CWalletTx::Status::CONFIRMED, *block_height, block_hash, posInBlock);
SyncTransaction(block.vtx[posInBlock], confirm, fUpdate);
}
// scan succeeded, record block as most recent successfully scanned
result.last_scanned_block = block_hash;
result.last_scanned_height = *block_height;
} else {
// could not scan block, keep scanning but record this block as the most recent failure
result.last_failed_block = block_hash;
result.status = ScanResult::FAILURE;
}
if (block_hash == stop_block) {
break;
}
{
auto locked_chain = chain().lock();
Optional<int> tip_height = locked_chain->getHeight();
if (!tip_height || *tip_height <= block_height || !locked_chain->getBlockHeight(block_hash)) {
// break successfully when rescan has reached the tip, or
// previous block is no longer on the chain due to a reorg
break;
}
// increment block and verification progress
block_hash = locked_chain->getBlockHash(++*block_height);
progress_current = chain().guessVerificationProgress(block_hash);
// handle updated tip hash
const uint256 prev_tip_hash = tip_hash;
tip_hash = locked_chain->getBlockHash(*tip_height);
if (stop_block.IsNull() && prev_tip_hash != tip_hash) {
// in case the tip has changed, update progress max
progress_end = chain().guessVerificationProgress(tip_hash);
}
}
}
ShowProgress(strprintf("%s " + _("Rescanning...").translated, GetDisplayName()), 100); // hide progress dialog in GUI
if (block_height && fAbortRescan) {
WalletLogPrintf("Rescan aborted at block %d. Progress=%f\n", *block_height, progress_current);
result.status = ScanResult::USER_ABORT;
} else if (block_height && chain().shutdownRequested()) {
WalletLogPrintf("Rescan interrupted by shutdown request at block %d. Progress=%f\n", *block_height, progress_current);
result.status = ScanResult::USER_ABORT;
} else {
WalletLogPrintf("Rescan completed in %15dms\n", GetTimeMillis() - start_time);
}
return result;
}
void CWallet::ReacceptWalletTransactions()
{
// If transactions aren't being broadcasted, don't let them into local mempool either
if (!fBroadcastTransactions)
return;
std::map<int64_t, CWalletTx*> mapSorted;
// Sort pending wallet transactions based on their initial wallet insertion order
for (std::pair<const uint256, CWalletTx>& item : mapWallet) {
const uint256& wtxid = item.first;
CWalletTx& wtx = item.second;
assert(wtx.GetHash() == wtxid);
int nDepth = wtx.GetDepthInMainChain();
if (!wtx.IsCoinBase() && (nDepth == 0 && !wtx.isAbandoned())) {
mapSorted.insert(std::make_pair(wtx.nOrderPos, &wtx));
}
}
// Try to add wallet transactions to memory pool
for (const std::pair<const int64_t, CWalletTx*>& item : mapSorted) {
CWalletTx& wtx = *(item.second);
std::string unused_err_string;
wtx.SubmitMemoryPoolAndRelay(unused_err_string, false);
}
}
bool CWalletTx::SubmitMemoryPoolAndRelay(std::string& err_string, bool relay)
{
// Can't relay if wallet is not broadcasting
if (!pwallet->GetBroadcastTransactions()) return false;
// Don't relay abandoned transactions
if (isAbandoned()) return false;
// Don't try to submit coinbase transactions. These would fail anyway but would
// cause log spam.
if (IsCoinBase()) return false;
// Don't try to submit conflicted or confirmed transactions.
if (GetDepthInMainChain() != 0) return false;
// Submit transaction to mempool for relay
pwallet->WalletLogPrintf("Submitting wtx %s to mempool for relay\n", GetHash().ToString());
// We must set fInMempool here - while it will be re-set to true by the
// entered-mempool callback, if we did not there would be a race where a
// user could call sendmoney in a loop and hit spurious out of funds errors
// because we think that this newly generated transaction's change is
// unavailable as we're not yet aware that it is in the mempool.
//
// Irrespective of the failure reason, un-marking fInMempool
// out-of-order is incorrect - it should be unmarked when
// TransactionRemovedFromMempool fires.
bool ret = pwallet->chain().broadcastTransaction(tx, pwallet->m_default_max_tx_fee, relay, err_string);
fInMempool |= ret;
return ret;
}
std::set<uint256> CWalletTx::GetConflicts() const
{
std::set<uint256> result;
if (pwallet != nullptr)
{
uint256 myHash = GetHash();
result = pwallet->GetConflicts(myHash);
result.erase(myHash);
}
return result;
}
CAmount CWalletTx::GetCachableAmount(AmountType type, const isminefilter& filter, bool recalculate) const
{
auto& amount = m_amounts[type];
if (recalculate || !amount.m_cached[filter]) {
amount.Set(filter, type == DEBIT ? pwallet->GetDebit(*tx, filter) : pwallet->GetCredit(*tx, filter));
m_is_cache_empty = false;
}
return amount.m_value[filter];
}
CAmount CWalletTx::GetDebit(const isminefilter& filter) const
{
if (tx->vin.empty())
return 0;
CAmount debit = 0;
if (filter & ISMINE_SPENDABLE) {
debit += GetCachableAmount(DEBIT, ISMINE_SPENDABLE);
}
if (filter & ISMINE_WATCH_ONLY) {
debit += GetCachableAmount(DEBIT, ISMINE_WATCH_ONLY);
}
return debit;
}
CAmount CWalletTx::GetCredit(const isminefilter& filter) const
{
// Must wait until coinbase is safely deep enough in the chain before valuing it
if (IsImmatureCoinBase())
return 0;
CAmount credit = 0;
if (filter & ISMINE_SPENDABLE) {
// GetBalance can assume transactions in mapWallet won't change
credit += GetCachableAmount(CREDIT, ISMINE_SPENDABLE);
}
if (filter & ISMINE_WATCH_ONLY) {
credit += GetCachableAmount(CREDIT, ISMINE_WATCH_ONLY);
}
return credit;
}
CAmount CWalletTx::GetImmatureCredit(bool fUseCache) const
{
if (IsImmatureCoinBase() && IsInMainChain()) {
return GetCachableAmount(IMMATURE_CREDIT, ISMINE_SPENDABLE, !fUseCache);
}
return 0;
}
CAmount CWalletTx::GetAvailableCredit(bool fUseCache, const isminefilter& filter) const
{
if (pwallet == nullptr)
return 0;
// Avoid caching ismine for NO or ALL cases (could remove this check and simplify in the future).
bool allow_cache = (filter & ISMINE_ALL) && (filter & ISMINE_ALL) != ISMINE_ALL;
// Must wait until coinbase is safely deep enough in the chain before valuing it
if (IsImmatureCoinBase())
return 0;
if (fUseCache && allow_cache && m_amounts[AVAILABLE_CREDIT].m_cached[filter]) {
return m_amounts[AVAILABLE_CREDIT].m_value[filter];
}
bool allow_used_addresses = (filter & ISMINE_USED) || !pwallet->IsWalletFlagSet(WALLET_FLAG_AVOID_REUSE);
CAmount nCredit = 0;
uint256 hashTx = GetHash();
for (unsigned int i = 0; i < tx->vout.size(); i++)
{
if (!pwallet->IsSpent(hashTx, i) && (allow_used_addresses || !pwallet->IsSpentKey(hashTx, i))) {
const CTxOut &txout = tx->vout[i];
nCredit += pwallet->GetCredit(txout, filter);
if (!MoneyRange(nCredit))
throw std::runtime_error(std::string(__func__) + " : value out of range");
}
}
if (allow_cache) {
m_amounts[AVAILABLE_CREDIT].Set(filter, nCredit);
m_is_cache_empty = false;
}
return nCredit;
}
CAmount CWalletTx::GetImmatureWatchOnlyCredit(const bool fUseCache) const
{
if (IsImmatureCoinBase() && IsInMainChain()) {
return GetCachableAmount(IMMATURE_CREDIT, ISMINE_WATCH_ONLY, !fUseCache);
}
return 0;
}
CAmount CWalletTx::GetChange() const
{
if (fChangeCached)
return nChangeCached;
nChangeCached = pwallet->GetChange(*tx);
fChangeCached = true;
return nChangeCached;
}
bool CWalletTx::InMempool() const
{
return fInMempool;
}
bool CWalletTx::IsTrusted(interfaces::Chain::Lock& locked_chain) const
{
std::set<uint256> s;
return IsTrusted(locked_chain, s);
}
bool CWalletTx::IsTrusted(interfaces::Chain::Lock& locked_chain, std::set<uint256>& trusted_parents) const
{
// Quick answer in most cases
if (!locked_chain.checkFinalTx(*tx)) return false;
int nDepth = GetDepthInMainChain();
if (nDepth >= 1) return true;
if (nDepth < 0) return false;
// using wtx's cached debit
if (!pwallet->m_spend_zero_conf_change || !IsFromMe(ISMINE_ALL)) return false;
// Don't trust unconfirmed transactions from us unless they are in the mempool.
if (!InMempool()) return false;
// Trusted if all inputs are from us and are in the mempool:
for (const CTxIn& txin : tx->vin)
{
// Transactions not sent by us: not trusted
const CWalletTx* parent = pwallet->GetWalletTx(txin.prevout.hash);
if (parent == nullptr) return false;
const CTxOut& parentOut = parent->tx->vout[txin.prevout.n];
// Check that this specific input being spent is trusted
if (pwallet->IsMine(parentOut) != ISMINE_SPENDABLE) return false;
// If we've already trusted this parent, continue
if (trusted_parents.count(parent->GetHash())) continue;
// Recurse to check that the parent is also trusted
if (!parent->IsTrusted(locked_chain, trusted_parents)) return false;
trusted_parents.insert(parent->GetHash());
}
return true;
}
bool CWalletTx::IsEquivalentTo(const CWalletTx& _tx) const
{
CMutableTransaction tx1 {*this->tx};
CMutableTransaction tx2 {*_tx.tx};
for (auto& txin : tx1.vin) txin.scriptSig = CScript();
for (auto& txin : tx2.vin) txin.scriptSig = CScript();
return CTransaction(tx1) == CTransaction(tx2);
}
// Rebroadcast transactions from the wallet. We do this on a random timer
// to slightly obfuscate which transactions come from our wallet.
//
// Ideally, we'd only resend transactions that we think should have been
// mined in the most recent block. Any transaction that wasn't in the top
// blockweight of transactions in the mempool shouldn't have been mined,
// and so is probably just sitting in the mempool waiting to be confirmed.
// Rebroadcasting does nothing to speed up confirmation and only damages
// privacy.
void CWallet::ResendWalletTransactions()
{
// During reindex, importing and IBD, old wallet transactions become
// unconfirmed. Don't resend them as that would spam other nodes.
if (!chain().isReadyToBroadcast()) return;
// Do this infrequently and randomly to avoid giving away
// that these are our transactions.
if (GetTime() < nNextResend || !fBroadcastTransactions) return;
bool fFirst = (nNextResend == 0);
nNextResend = GetTime() + GetRand(30 * 60);
if (fFirst) return;
// Only do it if there's been a new block since last time
if (m_best_block_time < nLastResend) return;
nLastResend = GetTime();
int submitted_tx_count = 0;
{ // locked_chain and cs_wallet scope
auto locked_chain = chain().lock();
LOCK(cs_wallet);
// Relay transactions
for (std::pair<const uint256, CWalletTx>& item : mapWallet) {
CWalletTx& wtx = item.second;
// Attempt to rebroadcast all txes more than 5 minutes older than
// the last block. SubmitMemoryPoolAndRelay() will not rebroadcast
// any confirmed or conflicting txs.
if (wtx.nTimeReceived > m_best_block_time - 5 * 60) continue;
std::string unused_err_string;
if (wtx.SubmitMemoryPoolAndRelay(unused_err_string, true)) ++submitted_tx_count;
}
} // locked_chain and cs_wallet
if (submitted_tx_count > 0) {
WalletLogPrintf("%s: resubmit %u unconfirmed transactions\n", __func__, submitted_tx_count);
}
}
/** @} */ // end of mapWallet
void MaybeResendWalletTxs()
{
for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
pwallet->ResendWalletTransactions();
}
}
/** @defgroup Actions
*
* @{
*/
CWallet::Balance CWallet::GetBalance(const int min_depth, bool avoid_reuse) const
{
Balance ret;
isminefilter reuse_filter = avoid_reuse ? ISMINE_NO : ISMINE_USED;
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
std::set<uint256> trusted_parents;
for (const auto& entry : mapWallet)
{
const CWalletTx& wtx = entry.second;
const bool is_trusted{wtx.IsTrusted(*locked_chain, trusted_parents)};
const int tx_depth{wtx.GetDepthInMainChain()};
const CAmount tx_credit_mine{wtx.GetAvailableCredit(/* fUseCache */ true, ISMINE_SPENDABLE | reuse_filter)};
const CAmount tx_credit_watchonly{wtx.GetAvailableCredit(/* fUseCache */ true, ISMINE_WATCH_ONLY | reuse_filter)};
if (is_trusted && tx_depth >= min_depth) {
ret.m_mine_trusted += tx_credit_mine;
ret.m_watchonly_trusted += tx_credit_watchonly;
}
if (!is_trusted && tx_depth == 0 && wtx.InMempool()) {
ret.m_mine_untrusted_pending += tx_credit_mine;
ret.m_watchonly_untrusted_pending += tx_credit_watchonly;
}
ret.m_mine_immature += wtx.GetImmatureCredit();
ret.m_watchonly_immature += wtx.GetImmatureWatchOnlyCredit();
}
}
return ret;
}
CAmount CWallet::GetAvailableBalance(const CCoinControl* coinControl) const
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
CAmount balance = 0;
std::vector<COutput> vCoins;
AvailableCoins(*locked_chain, vCoins, true, coinControl);
for (const COutput& out : vCoins) {
if (out.fSpendable) {
balance += out.tx->tx->vout[out.i].nValue;
}
}
return balance;
}
void CWallet::AvailableCoins(interfaces::Chain::Lock& locked_chain, std::vector<COutput>& vCoins, bool fOnlySafe, const CCoinControl* coinControl, const CAmount& nMinimumAmount, const CAmount& nMaximumAmount, const CAmount& nMinimumSumAmount, const uint64_t nMaximumCount) const
{
AssertLockHeld(cs_wallet);
vCoins.clear();
CAmount nTotal = 0;
// Either the WALLET_FLAG_AVOID_REUSE flag is not set (in which case we always allow), or we default to avoiding, and only in the case where
// a coin control object is provided, and has the avoid address reuse flag set to false, do we allow already used addresses
bool allow_used_addresses = !IsWalletFlagSet(WALLET_FLAG_AVOID_REUSE) || (coinControl && !coinControl->m_avoid_address_reuse);
const int min_depth = {coinControl ? coinControl->m_min_depth : DEFAULT_MIN_DEPTH};
const int max_depth = {coinControl ? coinControl->m_max_depth : DEFAULT_MAX_DEPTH};
std::set<uint256> trusted_parents;
for (const auto& entry : mapWallet)
{
const uint256& wtxid = entry.first;
const CWalletTx& wtx = entry.second;
if (!locked_chain.checkFinalTx(*wtx.tx)) {
continue;
}
if (wtx.IsImmatureCoinBase())
continue;
int nDepth = wtx.GetDepthInMainChain();
if (nDepth < 0)
continue;
// We should not consider coins which aren't at least in our mempool
// It's possible for these to be conflicted via ancestors which we may never be able to detect
if (nDepth == 0 && !wtx.InMempool())
continue;
bool safeTx = wtx.IsTrusted(locked_chain, trusted_parents);
// We should not consider coins from transactions that are replacing
// other transactions.
//
// Example: There is a transaction A which is replaced by bumpfee
// transaction B. In this case, we want to prevent creation of
// a transaction B' which spends an output of B.
//
// Reason: If transaction A were initially confirmed, transactions B
// and B' would no longer be valid, so the user would have to create
// a new transaction C to replace B'. However, in the case of a
// one-block reorg, transactions B' and C might BOTH be accepted,
// when the user only wanted one of them. Specifically, there could
// be a 1-block reorg away from the chain where transactions A and C
// were accepted to another chain where B, B', and C were all
// accepted.
if (nDepth == 0 && wtx.mapValue.count("replaces_txid")) {
safeTx = false;
}
// Similarly, we should not consider coins from transactions that
// have been replaced. In the example above, we would want to prevent
// creation of a transaction A' spending an output of A, because if
// transaction B were initially confirmed, conflicting with A and
// A', we wouldn't want to the user to create a transaction D
// intending to replace A', but potentially resulting in a scenario
// where A, A', and D could all be accepted (instead of just B and
// D, or just A and A' like the user would want).
if (nDepth == 0 && wtx.mapValue.count("replaced_by_txid")) {
safeTx = false;
}
if (fOnlySafe && !safeTx) {
continue;
}
if (nDepth < min_depth || nDepth > max_depth) {
continue;
}
for (unsigned int i = 0; i < wtx.tx->vout.size(); i++) {
if (wtx.tx->vout[i].nValue < nMinimumAmount || wtx.tx->vout[i].nValue > nMaximumAmount)
continue;
if (coinControl && coinControl->HasSelected() && !coinControl->fAllowOtherInputs && !coinControl->IsSelected(COutPoint(entry.first, i)))
continue;
if (IsLockedCoin(entry.first, i))
continue;
if (IsSpent(wtxid, i))
continue;
isminetype mine = IsMine(wtx.tx->vout[i]);
if (mine == ISMINE_NO) {
continue;
}
if (!allow_used_addresses && IsSpentKey(wtxid, i)) {
continue;
}
std::unique_ptr<SigningProvider> provider = GetSolvingProvider(wtx.tx->vout[i].scriptPubKey);
bool solvable = provider ? IsSolvable(*provider, wtx.tx->vout[i].scriptPubKey) : false;
bool spendable = ((mine & ISMINE_SPENDABLE) != ISMINE_NO) || (((mine & ISMINE_WATCH_ONLY) != ISMINE_NO) && (coinControl && coinControl->fAllowWatchOnly && solvable));
vCoins.push_back(COutput(&wtx, i, nDepth, spendable, solvable, safeTx, (coinControl && coinControl->fAllowWatchOnly)));
// Checks the sum amount of all UTXO's.
if (nMinimumSumAmount != MAX_MONEY) {
nTotal += wtx.tx->vout[i].nValue;
if (nTotal >= nMinimumSumAmount) {
return;
}
}
// Checks the maximum number of UTXO's.
if (nMaximumCount > 0 && vCoins.size() >= nMaximumCount) {
return;
}
}
}
}
std::map<CTxDestination, std::vector<COutput>> CWallet::ListCoins(interfaces::Chain::Lock& locked_chain) const
{
AssertLockHeld(cs_wallet);
std::map<CTxDestination, std::vector<COutput>> result;
std::vector<COutput> availableCoins;
AvailableCoins(locked_chain, availableCoins);
for (const COutput& coin : availableCoins) {
CTxDestination address;
if ((coin.fSpendable || (IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS) && coin.fSolvable)) &&
ExtractDestination(FindNonChangeParentOutput(*coin.tx->tx, coin.i).scriptPubKey, address)) {
result[address].emplace_back(std::move(coin));
}
}
std::vector<COutPoint> lockedCoins;
ListLockedCoins(lockedCoins);
// Include watch-only for LegacyScriptPubKeyMan wallets without private keys
const bool include_watch_only = GetLegacyScriptPubKeyMan() && IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS);
const isminetype is_mine_filter = include_watch_only ? ISMINE_WATCH_ONLY : ISMINE_SPENDABLE;
for (const COutPoint& output : lockedCoins) {
auto it = mapWallet.find(output.hash);
if (it != mapWallet.end()) {
int depth = it->second.GetDepthInMainChain();
if (depth >= 0 && output.n < it->second.tx->vout.size() &&
IsMine(it->second.tx->vout[output.n]) == is_mine_filter
) {
CTxDestination address;
if (ExtractDestination(FindNonChangeParentOutput(*it->second.tx, output.n).scriptPubKey, address)) {
result[address].emplace_back(
&it->second, output.n, depth, true /* spendable */, true /* solvable */, false /* safe */);
}
}
}
}
return result;
}
const CTxOut& CWallet::FindNonChangeParentOutput(const CTransaction& tx, int output) const
{
const CTransaction* ptx = &tx;
int n = output;
while (IsChange(ptx->vout[n]) && ptx->vin.size() > 0) {
const COutPoint& prevout = ptx->vin[0].prevout;
auto it = mapWallet.find(prevout.hash);
if (it == mapWallet.end() || it->second.tx->vout.size() <= prevout.n ||
!IsMine(it->second.tx->vout[prevout.n])) {
break;
}
ptx = it->second.tx.get();
n = prevout.n;
}
return ptx->vout[n];
}
bool CWallet::SelectCoinsMinConf(const CAmount& nTargetValue, const CoinEligibilityFilter& eligibility_filter, std::vector<OutputGroup> groups,
std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, const CoinSelectionParams& coin_selection_params, bool& bnb_used) const
{
setCoinsRet.clear();
nValueRet = 0;
std::vector<OutputGroup> utxo_pool;
if (coin_selection_params.use_bnb) {
// Get long term estimate
FeeCalculation feeCalc;
CCoinControl temp;
temp.m_confirm_target = 1008;
CFeeRate long_term_feerate = GetMinimumFeeRate(*this, temp, &feeCalc);
// Calculate cost of change
CAmount cost_of_change = GetDiscardRate(*this).GetFee(coin_selection_params.change_spend_size) + coin_selection_params.effective_fee.GetFee(coin_selection_params.change_output_size);
// Filter by the min conf specs and add to utxo_pool and calculate effective value
for (OutputGroup& group : groups) {
if (!group.EligibleForSpending(eligibility_filter)) continue;
group.fee = 0;
group.long_term_fee = 0;
group.effective_value = 0;
for (auto it = group.m_outputs.begin(); it != group.m_outputs.end(); ) {
const CInputCoin& coin = *it;
CAmount effective_value = coin.txout.nValue - (coin.m_input_bytes < 0 ? 0 : coin_selection_params.effective_fee.GetFee(coin.m_input_bytes));
// Only include outputs that are positive effective value (i.e. not dust)
if (effective_value > 0) {
group.fee += coin.m_input_bytes < 0 ? 0 : coin_selection_params.effective_fee.GetFee(coin.m_input_bytes);
group.long_term_fee += coin.m_input_bytes < 0 ? 0 : long_term_feerate.GetFee(coin.m_input_bytes);
if (coin_selection_params.m_subtract_fee_outputs) {
group.effective_value += coin.txout.nValue;
} else {
group.effective_value += effective_value;
}
++it;
} else {
it = group.Discard(coin);
}
}
if (group.effective_value > 0) utxo_pool.push_back(group);
}
// Calculate the fees for things that aren't inputs
CAmount not_input_fees = coin_selection_params.effective_fee.GetFee(coin_selection_params.tx_noinputs_size);
bnb_used = true;
return SelectCoinsBnB(utxo_pool, nTargetValue, cost_of_change, setCoinsRet, nValueRet, not_input_fees);
} else {
// Filter by the min conf specs and add to utxo_pool
for (const OutputGroup& group : groups) {
if (!group.EligibleForSpending(eligibility_filter)) continue;
utxo_pool.push_back(group);
}
bnb_used = false;
return KnapsackSolver(nTargetValue, utxo_pool, setCoinsRet, nValueRet);
}
}
bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAmount& nTargetValue, std::set<CInputCoin>& setCoinsRet, CAmount& nValueRet, const CCoinControl& coin_control, CoinSelectionParams& coin_selection_params, bool& bnb_used) const
{
std::vector<COutput> vCoins(vAvailableCoins);
CAmount value_to_select = nTargetValue;
// Default to bnb was not used. If we use it, we set it later
bnb_used = false;
// coin control -> return all selected outputs (we want all selected to go into the transaction for sure)
if (coin_control.HasSelected() && !coin_control.fAllowOtherInputs)
{
for (const COutput& out : vCoins)
{
if (!out.fSpendable)
continue;
nValueRet += out.tx->tx->vout[out.i].nValue;
setCoinsRet.insert(out.GetInputCoin());
}
return (nValueRet >= nTargetValue);
}
// calculate value from preset inputs and store them
std::set<CInputCoin> setPresetCoins;
CAmount nValueFromPresetInputs = 0;
std::vector<COutPoint> vPresetInputs;
coin_control.ListSelected(vPresetInputs);
for (const COutPoint& outpoint : vPresetInputs)
{
std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(outpoint.hash);
if (it != mapWallet.end())
{
const CWalletTx& wtx = it->second;
// Clearly invalid input, fail
if (wtx.tx->vout.size() <= outpoint.n) {
return false;
}
// Just to calculate the marginal byte size
CInputCoin coin(wtx.tx, outpoint.n, wtx.GetSpendSize(outpoint.n, false));
nValueFromPresetInputs += coin.txout.nValue;
if (coin.m_input_bytes <= 0) {
return false; // Not solvable, can't estimate size for fee
}
coin.effective_value = coin.txout.nValue - coin_selection_params.effective_fee.GetFee(coin.m_input_bytes);
if (coin_selection_params.use_bnb) {
value_to_select -= coin.effective_value;
} else {
value_to_select -= coin.txout.nValue;
}
setPresetCoins.insert(coin);
} else {
return false; // TODO: Allow non-wallet inputs
}
}
// remove preset inputs from vCoins
for (std::vector<COutput>::iterator it = vCoins.begin(); it != vCoins.end() && coin_control.HasSelected();)
{
if (setPresetCoins.count(it->GetInputCoin()))
it = vCoins.erase(it);
else
++it;
}
// form groups from remaining coins; note that preset coins will not
// automatically have their associated (same address) coins included
if (coin_control.m_avoid_partial_spends && vCoins.size() > OUTPUT_GROUP_MAX_ENTRIES) {
// Cases where we have 11+ outputs all pointing to the same destination may result in
// privacy leaks as they will potentially be deterministically sorted. We solve that by
// explicitly shuffling the outputs before processing
Shuffle(vCoins.begin(), vCoins.end(), FastRandomContext());
}
std::vector<OutputGroup> groups = GroupOutputs(vCoins, !coin_control.m_avoid_partial_spends);
unsigned int limit_ancestor_count;
unsigned int limit_descendant_count;
chain().getPackageLimits(limit_ancestor_count, limit_descendant_count);
size_t max_ancestors = (size_t)std::max<int64_t>(1, limit_ancestor_count);
size_t max_descendants = (size_t)std::max<int64_t>(1, limit_descendant_count);
bool fRejectLongChains = gArgs.GetBoolArg("-walletrejectlongchains", DEFAULT_WALLET_REJECT_LONG_CHAINS);
bool res = value_to_select <= 0 ||
SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(1, 6, 0), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used) ||
SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(1, 1, 0), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used) ||
(m_spend_zero_conf_change && SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(0, 1, 2), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used)) ||
(m_spend_zero_conf_change && SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(0, 1, std::min((size_t)4, max_ancestors/3), std::min((size_t)4, max_descendants/3)), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used)) ||
(m_spend_zero_conf_change && SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(0, 1, max_ancestors/2, max_descendants/2), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used)) ||
(m_spend_zero_conf_change && SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(0, 1, max_ancestors-1, max_descendants-1), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used)) ||
(m_spend_zero_conf_change && !fRejectLongChains && SelectCoinsMinConf(value_to_select, CoinEligibilityFilter(0, 1, std::numeric_limits<uint64_t>::max()), groups, setCoinsRet, nValueRet, coin_selection_params, bnb_used));
// because SelectCoinsMinConf clears the setCoinsRet, we now add the possible inputs to the coinset
util::insert(setCoinsRet, setPresetCoins);
// add preset inputs to the total value selected
nValueRet += nValueFromPresetInputs;
return res;
}
bool CWallet::SignTransaction(CMutableTransaction& tx) const
{
AssertLockHeld(cs_wallet);
// Build coins map
std::map<COutPoint, Coin> coins;
for (auto& input : tx.vin) {
std::map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(input.prevout.hash);
if(mi == mapWallet.end() || input.prevout.n >= mi->second.tx->vout.size()) {
return false;
}
const CWalletTx& wtx = mi->second;
coins[input.prevout] = Coin(wtx.tx->vout[input.prevout.n], wtx.m_confirm.block_height, wtx.IsCoinBase());
}
std::map<int, std::string> input_errors;
return SignTransaction(tx, coins, SIGHASH_ALL, input_errors);
}
bool CWallet::SignTransaction(CMutableTransaction& tx, const std::map<COutPoint, Coin>& coins, int sighash, std::map<int, std::string>& input_errors) const
{
// Sign the tx with ScriptPubKeyMans
// Because each ScriptPubKeyMan can sign more than one input, we need to keep track of each ScriptPubKeyMan that has signed this transaction.
// Each iteration, we may sign more txins than the txin that is specified in that iteration.
// We assume that each input is signed by only one ScriptPubKeyMan.
std::set<uint256> visited_spk_mans;
for (unsigned int i = 0; i < tx.vin.size(); i++) {
// Get the prevout
CTxIn& txin = tx.vin[i];
auto coin = coins.find(txin.prevout);
if (coin == coins.end() || coin->second.IsSpent()) {
input_errors[i] = "Input not found or already spent";
continue;
}
// Check if this input is complete
SignatureData sigdata = DataFromTransaction(tx, i, coin->second.out);
if (sigdata.complete) {
continue;
}
// Input needs to be signed, find the right ScriptPubKeyMan
std::set<ScriptPubKeyMan*> spk_mans = GetScriptPubKeyMans(coin->second.out.scriptPubKey, sigdata);
if (spk_mans.size() == 0) {
input_errors[i] = "Unable to sign input, missing keys";
continue;
}
for (auto& spk_man : spk_mans) {
// If we've already been signed by this spk_man, skip it
if (visited_spk_mans.count(spk_man->GetID()) > 0) {
continue;
}
// Sign the tx.
// spk_man->SignTransaction will return true if the transaction is complete,
// so we can exit early and return true if that happens.
if (spk_man->SignTransaction(tx, coins, sighash, input_errors)) {
return true;
}
// Add this spk_man to visited_spk_mans so we can skip it later
visited_spk_mans.insert(spk_man->GetID());
}
}
return false;
}
TransactionError CWallet::FillPSBT(PartiallySignedTransaction& psbtx, bool& complete, int sighash_type, bool sign, bool bip32derivs) const
{
LOCK(cs_wallet);
// Get all of the previous transactions
for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) {
const CTxIn& txin = psbtx.tx->vin[i];
PSBTInput& input = psbtx.inputs.at(i);
if (PSBTInputSigned(input)) {
continue;
}
// Verify input looks sane. This will check that we have at most one uxto, witness or non-witness.
if (!input.IsSane()) {
return TransactionError::INVALID_PSBT;
}
// If we have no utxo, grab it from the wallet.
if (!input.non_witness_utxo && input.witness_utxo.IsNull()) {
const uint256& txhash = txin.prevout.hash;
const auto it = mapWallet.find(txhash);
if (it != mapWallet.end()) {
const CWalletTx& wtx = it->second;
// We only need the non_witness_utxo, which is a superset of the witness_utxo.
// The signing code will switch to the smaller witness_utxo if this is ok.
input.non_witness_utxo = wtx.tx;
}
}
}
// Fill in information from ScriptPubKeyMans
// Because each ScriptPubKeyMan may be able to fill more than one input, we need to keep track of each ScriptPubKeyMan that has filled this psbt.
// Each iteration, we may fill more inputs than the input that is specified in that iteration.
// We assume that each input is filled by only one ScriptPubKeyMan
std::set<uint256> visited_spk_mans;
for (unsigned int i = 0; i < psbtx.tx->vin.size(); ++i) {
const CTxIn& txin = psbtx.tx->vin[i];
PSBTInput& input = psbtx.inputs.at(i);
if (PSBTInputSigned(input)) {
continue;
}
// Get the scriptPubKey to know which ScriptPubKeyMan to use
CScript script;
if (!input.witness_utxo.IsNull()) {
script = input.witness_utxo.scriptPubKey;
} else if (input.non_witness_utxo) {
if (txin.prevout.n >= input.non_witness_utxo->vout.size()) {
return TransactionError::MISSING_INPUTS;
}
script = input.non_witness_utxo->vout[txin.prevout.n].scriptPubKey;
} else {
// There's no UTXO so we can just skip this now
continue;
}
SignatureData sigdata;
input.FillSignatureData(sigdata);
std::set<ScriptPubKeyMan*> spk_mans = GetScriptPubKeyMans(script, sigdata);
if (spk_mans.size() == 0) {
continue;
}
for (auto& spk_man : spk_mans) {
// If we've already been signed by this spk_man, skip it
if (visited_spk_mans.count(spk_man->GetID()) > 0) {
continue;
}
// Fill in the information from the spk_man
TransactionError res = spk_man->FillPSBT(psbtx, sighash_type, sign, bip32derivs);
if (res != TransactionError::OK) {
return res;
}
// Add this spk_man to visited_spk_mans so we can skip it later
visited_spk_mans.insert(spk_man->GetID());
}
}
// Complete if every input is now signed
complete = true;
for (const auto& input : psbtx.inputs) {
complete &= PSBTInputSigned(input);
}
return TransactionError::OK;
}
SigningResult CWallet::SignMessage(const std::string& message, const PKHash& pkhash, std::string& str_sig) const
{
SignatureData sigdata;
CScript script_pub_key = GetScriptForDestination(pkhash);
for (const auto& spk_man_pair : m_spk_managers) {
if (spk_man_pair.second->CanProvide(script_pub_key, sigdata)) {
return spk_man_pair.second->SignMessage(message, pkhash, str_sig);
}
}
return SigningResult::PRIVATE_KEY_NOT_AVAILABLE;
}
bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, int& nChangePosInOut, std::string& strFailReason, bool lockUnspents, const std::set<int>& setSubtractFeeFromOutputs, CCoinControl coinControl)
{
std::vector<CRecipient> vecSend;
// Turn the txout set into a CRecipient vector.
for (size_t idx = 0; idx < tx.vout.size(); idx++) {
const CTxOut& txOut = tx.vout[idx];
CRecipient recipient = {txOut.scriptPubKey, txOut.nValue, setSubtractFeeFromOutputs.count(idx) == 1};
vecSend.push_back(recipient);
}
coinControl.fAllowOtherInputs = true;
for (const CTxIn& txin : tx.vin) {
coinControl.Select(txin.prevout);
}
// Acquire the locks to prevent races to the new locked unspents between the
// CreateTransaction call and LockCoin calls (when lockUnspents is true).
auto locked_chain = chain().lock();
LOCK(cs_wallet);
CTransactionRef tx_new;
if (!CreateTransaction(*locked_chain, vecSend, tx_new, nFeeRet, nChangePosInOut, strFailReason, coinControl, false)) {
return false;
}
if (nChangePosInOut != -1) {
tx.vout.insert(tx.vout.begin() + nChangePosInOut, tx_new->vout[nChangePosInOut]);
}
// Copy output sizes from new transaction; they may have had the fee
// subtracted from them.
for (unsigned int idx = 0; idx < tx.vout.size(); idx++) {
tx.vout[idx].nValue = tx_new->vout[idx].nValue;
}
// Add new txins while keeping original txin scriptSig/order.
for (const CTxIn& txin : tx_new->vin) {
if (!coinControl.IsSelected(txin.prevout)) {
tx.vin.push_back(txin);
if (lockUnspents) {
LockCoin(txin.prevout);
}
}
}
return true;
}
static bool IsCurrentForAntiFeeSniping(interfaces::Chain& chain, interfaces::Chain::Lock& locked_chain)
{
if (chain.isInitialBlockDownload()) {
return false;
}
constexpr int64_t MAX_ANTI_FEE_SNIPING_TIP_AGE = 8 * 60 * 60; // in seconds
if (locked_chain.getBlockTime(*locked_chain.getHeight()) < (GetTime() - MAX_ANTI_FEE_SNIPING_TIP_AGE)) {
return false;
}
return true;
}
/**
* Return a height-based locktime for new transactions (uses the height of the
* current chain tip unless we are not synced with the current chain
*/
static uint32_t GetLocktimeForNewTransaction(interfaces::Chain& chain, interfaces::Chain::Lock& locked_chain)
{
uint32_t const height = locked_chain.getHeight().get_value_or(-1);
uint32_t locktime;
// Discourage fee sniping.
//
// For a large miner the value of the transactions in the best block and
// the mempool can exceed the cost of deliberately attempting to mine two
// blocks to orphan the current best block. By setting nLockTime such that
// only the next block can include the transaction, we discourage this
// practice as the height restricted and limited blocksize gives miners
// considering fee sniping fewer options for pulling off this attack.
//
// A simple way to think about this is from the wallet's point of view we
// always want the blockchain to move forward. By setting nLockTime this
// way we're basically making the statement that we only want this
// transaction to appear in the next block; we don't want to potentially
// encourage reorgs by allowing transactions to appear at lower heights
// than the next block in forks of the best chain.
//
// Of course, the subsidy is high enough, and transaction volume low
// enough, that fee sniping isn't a problem yet, but by implementing a fix
// now we ensure code won't be written that makes assumptions about
// nLockTime that preclude a fix later.
if (IsCurrentForAntiFeeSniping(chain, locked_chain)) {
locktime = height;
// Secondly occasionally randomly pick a nLockTime even further back, so
// that transactions that are delayed after signing for whatever reason,
// e.g. high-latency mix networks and some CoinJoin implementations, have
// better privacy.
if (GetRandInt(10) == 0)
locktime = std::max(0, (int)locktime - GetRandInt(100));
} else {
// If our chain is lagging behind, we can't discourage fee sniping nor help
// the privacy of high-latency transactions. To avoid leaking a potentially
// unique "nLockTime fingerprint", set nLockTime to a constant.
locktime = 0;
}
assert(locktime <= height);
assert(locktime < LOCKTIME_THRESHOLD);
return locktime;
}
OutputType CWallet::TransactionChangeType(OutputType change_type, const std::vector<CRecipient>& vecSend)
{
// If -changetype is specified, always use that change type.
if (change_type != OutputType::CHANGE_AUTO) {
return change_type;
}
// if m_default_address_type is legacy, use legacy address as change (even
// if some of the outputs are P2WPKH or P2WSH).
if (m_default_address_type == OutputType::LEGACY) {
return OutputType::LEGACY;
}
// if any destination is P2WPKH or P2WSH, use P2WPKH for the change
// output.
for (const auto& recipient : vecSend) {
// Check if any destination contains a witness program:
int witnessversion = 0;
std::vector<unsigned char> witnessprogram;
if (recipient.scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) {
return OutputType::BECH32;
}
}
// else use m_default_address_type for change
return m_default_address_type;
}
bool CWallet::CreateTransaction(interfaces::Chain::Lock& locked_chain, const std::vector<CRecipient>& vecSend, CTransactionRef& tx, CAmount& nFeeRet,
int& nChangePosInOut, std::string& strFailReason, const CCoinControl& coin_control, bool sign)
{
CAmount nValue = 0;
const OutputType change_type = TransactionChangeType(coin_control.m_change_type ? *coin_control.m_change_type : m_default_change_type, vecSend);
ReserveDestination reservedest(this, change_type);
int nChangePosRequest = nChangePosInOut;
unsigned int nSubtractFeeFromAmount = 0;
for (const auto& recipient : vecSend)
{
if (nValue < 0 || recipient.nAmount < 0)
{
strFailReason = _("Transaction amounts must not be negative").translated;
return false;
}
nValue += recipient.nAmount;
if (recipient.fSubtractFeeFromAmount)
nSubtractFeeFromAmount++;
}
if (vecSend.empty())
{
strFailReason = _("Transaction must have at least one recipient").translated;
return false;
}
CMutableTransaction txNew;
txNew.nLockTime = GetLocktimeForNewTransaction(chain(), locked_chain);
FeeCalculation feeCalc;
CAmount nFeeNeeded;
int nBytes;
{
std::set<CInputCoin> setCoins;
auto locked_chain = chain().lock();
LOCK(cs_wallet);
{
std::vector<COutput> vAvailableCoins;
AvailableCoins(*locked_chain, vAvailableCoins, true, &coin_control, 1, MAX_MONEY, MAX_MONEY, 0);
CoinSelectionParams coin_selection_params; // Parameters for coin selection, init with dummy
// Create change script that will be used if we need change
// TODO: pass in scriptChange instead of reservedest so
// change transaction isn't always pay-to-bitcoin-address
CScript scriptChange;
// coin control: send change to custom address
if (!boost::get<CNoDestination>(&coin_control.destChange)) {
scriptChange = GetScriptForDestination(coin_control.destChange);
} else { // no coin control: send change to newly generated address
// Note: We use a new key here to keep it from being obvious which side is the change.
// The drawback is that by not reusing a previous key, the change may be lost if a
// backup is restored, if the backup doesn't have the new private key for the change.
// If we reused the old key, it would be possible to add code to look for and
// rediscover unknown transactions that were written with keys of ours to recover
// post-backup change.
// Reserve a new key pair from key pool
if (!CanGetAddresses(true)) {
strFailReason = _("Can't generate a change-address key. No keys in the internal keypool and can't generate any keys.").translated;
return false;
}
CTxDestination dest;
bool ret = reservedest.GetReservedDestination(dest, true);
if (!ret)
{
strFailReason = "Keypool ran out, please call keypoolrefill first";
return false;
}
scriptChange = GetScriptForDestination(dest);
}
CTxOut change_prototype_txout(0, scriptChange);
coin_selection_params.change_output_size = GetSerializeSize(change_prototype_txout);
CFeeRate discard_rate = GetDiscardRate(*this);
// Get the fee rate to use effective values in coin selection
CFeeRate nFeeRateNeeded = GetMinimumFeeRate(*this, coin_control, &feeCalc);
nFeeRet = 0;
bool pick_new_inputs = true;
CAmount nValueIn = 0;
// BnB selector is the only selector used when this is true.
// That should only happen on the first pass through the loop.
coin_selection_params.use_bnb = true;
coin_selection_params.m_subtract_fee_outputs = nSubtractFeeFromAmount != 0; // If we are doing subtract fee from recipient, don't use effective values
// Start with no fee and loop until there is enough fee
while (true)
{
nChangePosInOut = nChangePosRequest;
txNew.vin.clear();
txNew.vout.clear();
bool fFirst = true;
CAmount nValueToSelect = nValue;
if (nSubtractFeeFromAmount == 0)
nValueToSelect += nFeeRet;
// vouts to the payees
if (!coin_selection_params.m_subtract_fee_outputs) {
coin_selection_params.tx_noinputs_size = 11; // Static vsize overhead + outputs vsize. 4 nVersion, 4 nLocktime, 1 input count, 1 output count, 1 witness overhead (dummy, flag, stack size)
}
for (const auto& recipient : vecSend)
{
CTxOut txout(recipient.nAmount, recipient.scriptPubKey);
if (recipient.fSubtractFeeFromAmount)
{
assert(nSubtractFeeFromAmount != 0);
txout.nValue -= nFeeRet / nSubtractFeeFromAmount; // Subtract fee equally from each selected recipient
if (fFirst) // first receiver pays the remainder not divisible by output count
{
fFirst = false;
txout.nValue -= nFeeRet % nSubtractFeeFromAmount;
}
}
// Include the fee cost for outputs. Note this is only used for BnB right now
if (!coin_selection_params.m_subtract_fee_outputs) {
coin_selection_params.tx_noinputs_size += ::GetSerializeSize(txout, PROTOCOL_VERSION);
}
if (IsDust(txout, chain().relayDustFee()))
{
if (recipient.fSubtractFeeFromAmount && nFeeRet > 0)
{
if (txout.nValue < 0)
strFailReason = _("The transaction amount is too small to pay the fee").translated;
else
strFailReason = _("The transaction amount is too small to send after the fee has been deducted").translated;
}
else
strFailReason = _("Transaction amount too small").translated;
return false;
}
txNew.vout.push_back(txout);
}
// Choose coins to use
bool bnb_used = false;
if (pick_new_inputs) {
nValueIn = 0;
setCoins.clear();
int change_spend_size = CalculateMaximumSignedInputSize(change_prototype_txout, this);
// If the wallet doesn't know how to sign change output, assume p2sh-p2wpkh
// as lower-bound to allow BnB to do it's thing
if (change_spend_size == -1) {
coin_selection_params.change_spend_size = DUMMY_NESTED_P2WPKH_INPUT_SIZE;
} else {
coin_selection_params.change_spend_size = (size_t)change_spend_size;
}
coin_selection_params.effective_fee = nFeeRateNeeded;
if (!SelectCoins(vAvailableCoins, nValueToSelect, setCoins, nValueIn, coin_control, coin_selection_params, bnb_used))
{
// If BnB was used, it was the first pass. No longer the first pass and continue loop with knapsack.
if (bnb_used) {
coin_selection_params.use_bnb = false;
continue;
}
else {
strFailReason = _("Insufficient funds").translated;
return false;
}
}
} else {
bnb_used = false;
}
const CAmount nChange = nValueIn - nValueToSelect;
if (nChange > 0)
{
// Fill a vout to ourself
CTxOut newTxOut(nChange, scriptChange);
// Never create dust outputs; if we would, just
// add the dust to the fee.
// The nChange when BnB is used is always going to go to fees.
if (IsDust(newTxOut, discard_rate) || bnb_used)
{
nChangePosInOut = -1;
nFeeRet += nChange;
}
else
{
if (nChangePosInOut == -1)
{
// Insert change txn at random position:
nChangePosInOut = GetRandInt(txNew.vout.size()+1);
}
else if ((unsigned int)nChangePosInOut > txNew.vout.size())
{
strFailReason = _("Change index out of range").translated;
return false;
}
std::vector<CTxOut>::iterator position = txNew.vout.begin()+nChangePosInOut;
txNew.vout.insert(position, newTxOut);
}
} else {
nChangePosInOut = -1;
}
// Dummy fill vin for maximum size estimation
//
for (const auto& coin : setCoins) {
txNew.vin.push_back(CTxIn(coin.outpoint,CScript()));
}
nBytes = CalculateMaximumSignedTxSize(CTransaction(txNew), this, coin_control.fAllowWatchOnly);
if (nBytes < 0) {
strFailReason = _("Signing transaction failed").translated;
return false;
}
nFeeNeeded = GetMinimumFee(*this, nBytes, coin_control, &feeCalc);
if (feeCalc.reason == FeeReason::FALLBACK && !m_allow_fallback_fee) {
// eventually allow a fallback fee
strFailReason = _("Fee estimation failed. Fallbackfee is disabled. Wait a few blocks or enable -fallbackfee.").translated;
return false;
}
if (nFeeRet >= nFeeNeeded) {
// Reduce fee to only the needed amount if possible. This
// prevents potential overpayment in fees if the coins
// selected to meet nFeeNeeded result in a transaction that
// requires less fee than the prior iteration.
// If we have no change and a big enough excess fee, then
// try to construct transaction again only without picking
// new inputs. We now know we only need the smaller fee
// (because of reduced tx size) and so we should add a
// change output. Only try this once.
if (nChangePosInOut == -1 && nSubtractFeeFromAmount == 0 && pick_new_inputs) {
unsigned int tx_size_with_change = nBytes + coin_selection_params.change_output_size + 2; // Add 2 as a buffer in case increasing # of outputs changes compact size
CAmount fee_needed_with_change = GetMinimumFee(*this, tx_size_with_change, coin_control, nullptr);
CAmount minimum_value_for_change = GetDustThreshold(change_prototype_txout, discard_rate);
if (nFeeRet >= fee_needed_with_change + minimum_value_for_change) {
pick_new_inputs = false;
nFeeRet = fee_needed_with_change;
continue;
}
}
// If we have change output already, just increase it
if (nFeeRet > nFeeNeeded && nChangePosInOut != -1 && nSubtractFeeFromAmount == 0) {
CAmount extraFeePaid = nFeeRet - nFeeNeeded;
std::vector<CTxOut>::iterator change_position = txNew.vout.begin()+nChangePosInOut;
change_position->nValue += extraFeePaid;
nFeeRet -= extraFeePaid;
}
break; // Done, enough fee included.
}
else if (!pick_new_inputs) {
// This shouldn't happen, we should have had enough excess
// fee to pay for the new output and still meet nFeeNeeded
// Or we should have just subtracted fee from recipients and
// nFeeNeeded should not have changed
strFailReason = _("Transaction fee and change calculation failed").translated;
return false;
}
// Try to reduce change to include necessary fee
if (nChangePosInOut != -1 && nSubtractFeeFromAmount == 0) {
CAmount additionalFeeNeeded = nFeeNeeded - nFeeRet;
std::vector<CTxOut>::iterator change_position = txNew.vout.begin()+nChangePosInOut;
// Only reduce change if remaining amount is still a large enough output.
if (change_position->nValue >= MIN_FINAL_CHANGE + additionalFeeNeeded) {
change_position->nValue -= additionalFeeNeeded;
nFeeRet += additionalFeeNeeded;
break; // Done, able to increase fee from change
}
}
// If subtracting fee from recipients, we now know what fee we
// need to subtract, we have no reason to reselect inputs
if (nSubtractFeeFromAmount > 0) {
pick_new_inputs = false;
}
// Include more fee and try again.
nFeeRet = nFeeNeeded;
coin_selection_params.use_bnb = false;
continue;
}
}
// Shuffle selected coins and fill in final vin
txNew.vin.clear();
std::vector<CInputCoin> selected_coins(setCoins.begin(), setCoins.end());
Shuffle(selected_coins.begin(), selected_coins.end(), FastRandomContext());
// Note how the sequence number is set to non-maxint so that
// the nLockTime set above actually works.
//
// BIP125 defines opt-in RBF as any nSequence < maxint-1, so
// we use the highest possible value in that range (maxint-2)
// to avoid conflicting with other possible uses of nSequence,
// and in the spirit of "smallest possible change from prior
// behavior."
const uint32_t nSequence = coin_control.m_signal_bip125_rbf.get_value_or(m_signal_rbf) ? MAX_BIP125_RBF_SEQUENCE : (CTxIn::SEQUENCE_FINAL - 1);
for (const auto& coin : selected_coins) {
txNew.vin.push_back(CTxIn(coin.outpoint, CScript(), nSequence));
}
if (sign && !SignTransaction(txNew)) {
strFailReason = _("Signing transaction failed").translated;
return false;
}
// Return the constructed transaction data.
tx = MakeTransactionRef(std::move(txNew));
// Limit size
if (GetTransactionWeight(*tx) > MAX_STANDARD_TX_WEIGHT)
{
strFailReason = _("Transaction too large").translated;
return false;
}
}
if (nFeeRet > m_default_max_tx_fee) {
strFailReason = TransactionErrorString(TransactionError::MAX_FEE_EXCEEDED);
return false;
}
if (gArgs.GetBoolArg("-walletrejectlongchains", DEFAULT_WALLET_REJECT_LONG_CHAINS)) {
// Lastly, ensure this tx will pass the mempool's chain limits
if (!chain().checkChainLimits(tx)) {
strFailReason = _("Transaction has too long of a mempool chain").translated;
return false;
}
}
// Before we return success, we assume any change key will be used to prevent
// accidental re-use.
reservedest.KeepDestination();
WalletLogPrintf("Fee Calculation: Fee:%d Bytes:%u Needed:%d Tgt:%d (requested %d) Reason:\"%s\" Decay %.5f: Estimation: (%g - %g) %.2f%% %.1f/(%.1f %d mem %.1f out) Fail: (%g - %g) %.2f%% %.1f/(%.1f %d mem %.1f out)\n",
nFeeRet, nBytes, nFeeNeeded, feeCalc.returnedTarget, feeCalc.desiredTarget, StringForFeeReason(feeCalc.reason), feeCalc.est.decay,
feeCalc.est.pass.start, feeCalc.est.pass.end,
100 * feeCalc.est.pass.withinTarget / (feeCalc.est.pass.totalConfirmed + feeCalc.est.pass.inMempool + feeCalc.est.pass.leftMempool),
feeCalc.est.pass.withinTarget, feeCalc.est.pass.totalConfirmed, feeCalc.est.pass.inMempool, feeCalc.est.pass.leftMempool,
feeCalc.est.fail.start, feeCalc.est.fail.end,
100 * feeCalc.est.fail.withinTarget / (feeCalc.est.fail.totalConfirmed + feeCalc.est.fail.inMempool + feeCalc.est.fail.leftMempool),
feeCalc.est.fail.withinTarget, feeCalc.est.fail.totalConfirmed, feeCalc.est.fail.inMempool, feeCalc.est.fail.leftMempool);
return true;
}
void CWallet::CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::vector<std::pair<std::string, std::string>> orderForm)
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
CWalletTx wtxNew(this, std::move(tx));
wtxNew.mapValue = std::move(mapValue);
wtxNew.vOrderForm = std::move(orderForm);
wtxNew.fTimeReceivedIsTxTime = true;
wtxNew.fFromMe = true;
WalletLogPrintf("CommitTransaction:\n%s", wtxNew.tx->ToString()); /* Continued */
// Add tx to wallet, because if it has change it's also ours,
// otherwise just for transaction history.
AddToWallet(wtxNew);
// Notify that old coins are spent
for (const CTxIn& txin : wtxNew.tx->vin) {
CWalletTx &coin = mapWallet.at(txin.prevout.hash);
coin.BindWallet(this);
NotifyTransactionChanged(this, coin.GetHash(), CT_UPDATED);
}
// Get the inserted-CWalletTx from mapWallet so that the
// fInMempool flag is cached properly
CWalletTx& wtx = mapWallet.at(wtxNew.GetHash());
if (!fBroadcastTransactions) {
// Don't submit tx to the mempool
return;
}
std::string err_string;
if (!wtx.SubmitMemoryPoolAndRelay(err_string, true)) {
WalletLogPrintf("CommitTransaction(): Transaction cannot be broadcast immediately, %s\n", err_string);
// TODO: if we expect the failure to be long term or permanent, instead delete wtx from the wallet and return failure.
}
}
DBErrors CWallet::LoadWallet(bool& fFirstRunRet)
{
// Even if we don't use this lock in this function, we want to preserve
// lock order in LoadToWallet if query of chain state is needed to know
// tx status. If lock can't be taken (e.g bitcoin-wallet), tx confirmation
// status may be not reliable.
auto locked_chain = LockChain();
LOCK(cs_wallet);
fFirstRunRet = false;
DBErrors nLoadWalletRet = WalletBatch(*database,"cr+").LoadWallet(this);
if (nLoadWalletRet == DBErrors::NEED_REWRITE)
{
if (database->Rewrite("\x04pool"))
{
for (const auto& spk_man_pair : m_spk_managers) {
spk_man_pair.second->RewriteDB();
}
}
}
// This wallet is in its first run if there are no ScriptPubKeyMans and it isn't blank or no privkeys
fFirstRunRet = m_spk_managers.empty() && !IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS) && !IsWalletFlagSet(WALLET_FLAG_BLANK_WALLET);
if (fFirstRunRet) {
assert(m_external_spk_managers.empty());
assert(m_internal_spk_managers.empty());
}
if (nLoadWalletRet != DBErrors::LOAD_OK)
return nLoadWalletRet;
return DBErrors::LOAD_OK;
}
DBErrors CWallet::ZapSelectTx(std::vector<uint256>& vHashIn, std::vector<uint256>& vHashOut)
{
AssertLockHeld(cs_wallet);
DBErrors nZapSelectTxRet = WalletBatch(*database, "cr+").ZapSelectTx(vHashIn, vHashOut);
for (uint256 hash : vHashOut) {
const auto& it = mapWallet.find(hash);
wtxOrdered.erase(it->second.m_it_wtxOrdered);
mapWallet.erase(it);
NotifyTransactionChanged(this, hash, CT_DELETED);
}
if (nZapSelectTxRet == DBErrors::NEED_REWRITE)
{
if (database->Rewrite("\x04pool"))
{
for (const auto& spk_man_pair : m_spk_managers) {
spk_man_pair.second->RewriteDB();
}
}
}
if (nZapSelectTxRet != DBErrors::LOAD_OK)
return nZapSelectTxRet;
MarkDirty();
return DBErrors::LOAD_OK;
}
DBErrors CWallet::ZapWalletTx(std::vector<CWalletTx>& vWtx)
{
DBErrors nZapWalletTxRet = WalletBatch(*database,"cr+").ZapWalletTx(vWtx);
if (nZapWalletTxRet == DBErrors::NEED_REWRITE)
{
if (database->Rewrite("\x04pool"))
{
for (const auto& spk_man_pair : m_spk_managers) {
spk_man_pair.second->RewriteDB();
}
}
}
if (nZapWalletTxRet != DBErrors::LOAD_OK)
return nZapWalletTxRet;
return DBErrors::LOAD_OK;
}
bool CWallet::SetAddressBookWithDB(WalletBatch& batch, const CTxDestination& address, const std::string& strName, const std::string& strPurpose)
{
bool fUpdated = false;
{
LOCK(cs_wallet);
std::map<CTxDestination, CAddressBookData>::iterator mi = m_address_book.find(address);
fUpdated = (mi != m_address_book.end() && !mi->second.IsChange());
m_address_book[address].SetLabel(strName);
if (!strPurpose.empty()) /* update purpose only if requested */
m_address_book[address].purpose = strPurpose;
}
NotifyAddressBookChanged(this, address, strName, IsMine(address) != ISMINE_NO,
strPurpose, (fUpdated ? CT_UPDATED : CT_NEW) );
if (!strPurpose.empty() && !batch.WritePurpose(EncodeDestination(address), strPurpose))
return false;
return batch.WriteName(EncodeDestination(address), strName);
}
bool CWallet::SetAddressBook(const CTxDestination& address, const std::string& strName, const std::string& strPurpose)
{
WalletBatch batch(*database);
return SetAddressBookWithDB(batch, address, strName, strPurpose);
}
bool CWallet::DelAddressBook(const CTxDestination& address)
{
// If we want to delete receiving addresses, we need to take care that DestData "used" (and possibly newer DestData) gets preserved (and the "deleted" address transformed into a change entry instead of actually being deleted)
// NOTE: This isn't a problem for sending addresses because they never have any DestData yet!
// When adding new DestData, it should be considered here whether to retain or delete it (or move it?).
assert(!IsMine(address));
{
LOCK(cs_wallet);
// Delete destdata tuples associated with address
std::string strAddress = EncodeDestination(address);
for (const std::pair<const std::string, std::string> &item : m_address_book[address].destdata)
{
WalletBatch(*database).EraseDestData(strAddress, item.first);
}
m_address_book.erase(address);
}
NotifyAddressBookChanged(this, address, "", IsMine(address) != ISMINE_NO, "", CT_DELETED);
WalletBatch(*database).ErasePurpose(EncodeDestination(address));
return WalletBatch(*database).EraseName(EncodeDestination(address));
}
size_t CWallet::KeypoolCountExternalKeys() const
{
AssertLockHeld(cs_wallet);
unsigned int count = 0;
for (auto spk_man : GetActiveScriptPubKeyMans()) {
count += spk_man->KeypoolCountExternalKeys();
}
return count;
}
unsigned int CWallet::GetKeyPoolSize() const
{
AssertLockHeld(cs_wallet);
unsigned int count = 0;
for (auto spk_man : GetActiveScriptPubKeyMans()) {
count += spk_man->GetKeyPoolSize();
}
return count;
}
bool CWallet::TopUpKeyPool(unsigned int kpSize)
{
LOCK(cs_wallet);
bool res = true;
for (auto spk_man : GetActiveScriptPubKeyMans()) {
res &= spk_man->TopUp(kpSize);
}
return res;
}
bool CWallet::GetNewDestination(const OutputType type, const std::string label, CTxDestination& dest, std::string& error)
{
LOCK(cs_wallet);
error.clear();
bool result = false;
auto spk_man = GetScriptPubKeyMan(type, false /* internal */);
if (spk_man) {
spk_man->TopUp();
result = spk_man->GetNewDestination(type, dest, error);
}
if (result) {
SetAddressBook(dest, label, "receive");
}
return result;
}
bool CWallet::GetNewChangeDestination(const OutputType type, CTxDestination& dest, std::string& error)
{
LOCK(cs_wallet);
error.clear();
ReserveDestination reservedest(this, type);
if (!reservedest.GetReservedDestination(dest, true)) {
error = "Error: Keypool ran out, please call keypoolrefill first";
return false;
}
reservedest.KeepDestination();
return true;
}
int64_t CWallet::GetOldestKeyPoolTime() const
{
LOCK(cs_wallet);
int64_t oldestKey = std::numeric_limits<int64_t>::max();
for (const auto& spk_man_pair : m_spk_managers) {
oldestKey = std::min(oldestKey, spk_man_pair.second->GetOldestKeyPoolTime());
}
return oldestKey;
}
void CWallet::MarkDestinationsDirty(const std::set<CTxDestination>& destinations) {
for (auto& entry : mapWallet) {
CWalletTx& wtx = entry.second;
if (wtx.m_is_cache_empty) continue;
for (unsigned int i = 0; i < wtx.tx->vout.size(); i++) {
CTxDestination dst;
if (ExtractDestination(wtx.tx->vout[i].scriptPubKey, dst) && destinations.count(dst)) {
wtx.MarkDirty();
break;
}
}
}
}
std::map<CTxDestination, CAmount> CWallet::GetAddressBalances(interfaces::Chain::Lock& locked_chain) const
{
std::map<CTxDestination, CAmount> balances;
{
LOCK(cs_wallet);
std::set<uint256> trusted_parents;
for (const auto& walletEntry : mapWallet)
{
const CWalletTx& wtx = walletEntry.second;
if (!wtx.IsTrusted(locked_chain, trusted_parents))
continue;
if (wtx.IsImmatureCoinBase())
continue;
int nDepth = wtx.GetDepthInMainChain();
if (nDepth < (wtx.IsFromMe(ISMINE_ALL) ? 0 : 1))
continue;
for (unsigned int i = 0; i < wtx.tx->vout.size(); i++)
{
CTxDestination addr;
if (!IsMine(wtx.tx->vout[i]))
continue;
if(!ExtractDestination(wtx.tx->vout[i].scriptPubKey, addr))
continue;
CAmount n = IsSpent(walletEntry.first, i) ? 0 : wtx.tx->vout[i].nValue;
if (!balances.count(addr))
balances[addr] = 0;
balances[addr] += n;
}
}
}
return balances;
}
std::set< std::set<CTxDestination> > CWallet::GetAddressGroupings() const
{
AssertLockHeld(cs_wallet);
std::set< std::set<CTxDestination> > groupings;
std::set<CTxDestination> grouping;
for (const auto& walletEntry : mapWallet)
{
const CWalletTx& wtx = walletEntry.second;
if (wtx.tx->vin.size() > 0)
{
bool any_mine = false;
// group all input addresses with each other
for (const CTxIn& txin : wtx.tx->vin)
{
CTxDestination address;
if(!IsMine(txin)) /* If this input isn't mine, ignore it */
continue;
if(!ExtractDestination(mapWallet.at(txin.prevout.hash).tx->vout[txin.prevout.n].scriptPubKey, address))
continue;
grouping.insert(address);
any_mine = true;
}
// group change with input addresses
if (any_mine)
{
for (const CTxOut& txout : wtx.tx->vout)
if (IsChange(txout))
{
CTxDestination txoutAddr;
if(!ExtractDestination(txout.scriptPubKey, txoutAddr))
continue;
grouping.insert(txoutAddr);
}
}
if (grouping.size() > 0)
{
groupings.insert(grouping);
grouping.clear();
}
}
// group lone addrs by themselves
for (const auto& txout : wtx.tx->vout)
if (IsMine(txout))
{
CTxDestination address;
if(!ExtractDestination(txout.scriptPubKey, address))
continue;
grouping.insert(address);
groupings.insert(grouping);
grouping.clear();
}
}
std::set< std::set<CTxDestination>* > uniqueGroupings; // a set of pointers to groups of addresses
std::map< CTxDestination, std::set<CTxDestination>* > setmap; // map addresses to the unique group containing it
for (std::set<CTxDestination> _grouping : groupings)
{
// make a set of all the groups hit by this new group
std::set< std::set<CTxDestination>* > hits;
std::map< CTxDestination, std::set<CTxDestination>* >::iterator it;
for (const CTxDestination& address : _grouping)
if ((it = setmap.find(address)) != setmap.end())
hits.insert((*it).second);
// merge all hit groups into a new single group and delete old groups
std::set<CTxDestination>* merged = new std::set<CTxDestination>(_grouping);
for (std::set<CTxDestination>* hit : hits)
{
merged->insert(hit->begin(), hit->end());
uniqueGroupings.erase(hit);
delete hit;
}
uniqueGroupings.insert(merged);
// update setmap
for (const CTxDestination& element : *merged)
setmap[element] = merged;
}
std::set< std::set<CTxDestination> > ret;
for (const std::set<CTxDestination>* uniqueGrouping : uniqueGroupings)
{
ret.insert(*uniqueGrouping);
delete uniqueGrouping;
}
return ret;
}
std::set<CTxDestination> CWallet::GetLabelAddresses(const std::string& label) const
{
LOCK(cs_wallet);
std::set<CTxDestination> result;
for (const std::pair<const CTxDestination, CAddressBookData>& item : m_address_book)
{
if (item.second.IsChange()) continue;
const CTxDestination& address = item.first;
const std::string& strName = item.second.name;
if (strName == label)
result.insert(address);
}
return result;
}
bool ReserveDestination::GetReservedDestination(CTxDestination& dest, bool internal)
{
m_spk_man = pwallet->GetScriptPubKeyMan(type, internal);
if (!m_spk_man) {
return false;
}
if (nIndex == -1)
{
m_spk_man->TopUp();
CKeyPool keypool;
if (!m_spk_man->GetReservedDestination(type, internal, address, nIndex, keypool)) {
return false;
}
fInternal = keypool.fInternal;
}
dest = address;
return true;
}
void ReserveDestination::KeepDestination()
{
if (nIndex != -1) {
m_spk_man->KeepDestination(nIndex, type);
}
nIndex = -1;
address = CNoDestination();
}
void ReserveDestination::ReturnDestination()
{
if (nIndex != -1) {
m_spk_man->ReturnDestination(nIndex, fInternal, address);
}
nIndex = -1;
address = CNoDestination();
}
void CWallet::LockCoin(const COutPoint& output)
{
AssertLockHeld(cs_wallet);
setLockedCoins.insert(output);
}
void CWallet::UnlockCoin(const COutPoint& output)
{
AssertLockHeld(cs_wallet);
setLockedCoins.erase(output);
}
void CWallet::UnlockAllCoins()
{
AssertLockHeld(cs_wallet);
setLockedCoins.clear();
}
bool CWallet::IsLockedCoin(uint256 hash, unsigned int n) const
{
AssertLockHeld(cs_wallet);
COutPoint outpt(hash, n);
return (setLockedCoins.count(outpt) > 0);
}
void CWallet::ListLockedCoins(std::vector<COutPoint>& vOutpts) const
{
AssertLockHeld(cs_wallet);
for (std::set<COutPoint>::iterator it = setLockedCoins.begin();
it != setLockedCoins.end(); it++) {
COutPoint outpt = (*it);
vOutpts.push_back(outpt);
}
}
/** @} */ // end of Actions
void CWallet::GetKeyBirthTimes(interfaces::Chain::Lock& locked_chain, std::map<CKeyID, int64_t>& mapKeyBirth) const {
AssertLockHeld(cs_wallet);
mapKeyBirth.clear();
LegacyScriptPubKeyMan* spk_man = GetLegacyScriptPubKeyMan();
assert(spk_man != nullptr);
LOCK(spk_man->cs_KeyStore);
// get birth times for keys with metadata
for (const auto& entry : spk_man->mapKeyMetadata) {
if (entry.second.nCreateTime) {
mapKeyBirth[entry.first] = entry.second.nCreateTime;
}
}
// map in which we'll infer heights of other keys
const Optional<int> tip_height = locked_chain.getHeight();
const int max_height = tip_height && *tip_height > 144 ? *tip_height - 144 : 0; // the tip can be reorganized; use a 144-block safety margin
std::map<CKeyID, int> mapKeyFirstBlock;
for (const CKeyID &keyid : spk_man->GetKeys()) {
if (mapKeyBirth.count(keyid) == 0)
mapKeyFirstBlock[keyid] = max_height;
}
// if there are no such keys, we're done
if (mapKeyFirstBlock.empty())
return;
// find first block that affects those keys, if there are any left
for (const auto& entry : mapWallet) {
// iterate over all wallet transactions...
const CWalletTx &wtx = entry.second;
if (Optional<int> height = locked_chain.getBlockHeight(wtx.m_confirm.hashBlock)) {
// ... which are already in a block
for (const CTxOut &txout : wtx.tx->vout) {
// iterate over all their outputs
for (const auto &keyid : GetAffectedKeys(txout.scriptPubKey, *spk_man)) {
// ... and all their affected keys
std::map<CKeyID, int>::iterator rit = mapKeyFirstBlock.find(keyid);
if (rit != mapKeyFirstBlock.end() && *height < rit->second)
rit->second = *height;
}
}
}
}
// Extract block timestamps for those keys
for (const auto& entry : mapKeyFirstBlock)
mapKeyBirth[entry.first] = locked_chain.getBlockTime(entry.second) - TIMESTAMP_WINDOW; // block times can be 2h off
}
/**
* Compute smart timestamp for a transaction being added to the wallet.
*
* Logic:
* - If sending a transaction, assign its timestamp to the current time.
* - If receiving a transaction outside a block, assign its timestamp to the
* current time.
* - If receiving a block with a future timestamp, assign all its (not already
* known) transactions' timestamps to the current time.
* - If receiving a block with a past timestamp, before the most recent known
* transaction (that we care about), assign all its (not already known)
* transactions' timestamps to the same timestamp as that most-recent-known
* transaction.
* - If receiving a block with a past timestamp, but after the most recent known
* transaction, assign all its (not already known) transactions' timestamps to
* the block time.
*
* For more information see CWalletTx::nTimeSmart,
* https://bitcointalk.org/?topic=54527, or
* https://github.com/bitcoin/bitcoin/pull/1393.
*/
unsigned int CWallet::ComputeTimeSmart(const CWalletTx& wtx) const
{
unsigned int nTimeSmart = wtx.nTimeReceived;
if (!wtx.isUnconfirmed() && !wtx.isAbandoned()) {
int64_t blocktime;
if (chain().findBlock(wtx.m_confirm.hashBlock, nullptr /* block */, &blocktime)) {
int64_t latestNow = wtx.nTimeReceived;
int64_t latestEntry = 0;
// Tolerate times up to the last timestamp in the wallet not more than 5 minutes into the future
int64_t latestTolerated = latestNow + 300;
const TxItems& txOrdered = wtxOrdered;
for (auto it = txOrdered.rbegin(); it != txOrdered.rend(); ++it) {
CWalletTx* const pwtx = it->second;
if (pwtx == &wtx) {
continue;
}
int64_t nSmartTime;
nSmartTime = pwtx->nTimeSmart;
if (!nSmartTime) {
nSmartTime = pwtx->nTimeReceived;
}
if (nSmartTime <= latestTolerated) {
latestEntry = nSmartTime;
if (nSmartTime > latestNow) {
latestNow = nSmartTime;
}
break;
}
}
nTimeSmart = std::max(latestEntry, std::min(blocktime, latestNow));
} else {
WalletLogPrintf("%s: found %s in block %s not in index\n", __func__, wtx.GetHash().ToString(), wtx.m_confirm.hashBlock.ToString());
}
}
return nTimeSmart;
}
bool CWallet::AddDestData(WalletBatch& batch, const CTxDestination &dest, const std::string &key, const std::string &value)
{
if (boost::get<CNoDestination>(&dest))
return false;
m_address_book[dest].destdata.insert(std::make_pair(key, value));
return batch.WriteDestData(EncodeDestination(dest), key, value);
}
bool CWallet::EraseDestData(WalletBatch& batch, const CTxDestination &dest, const std::string &key)
{
if (!m_address_book[dest].destdata.erase(key))
return false;
return batch.EraseDestData(EncodeDestination(dest), key);
}
void CWallet::LoadDestData(const CTxDestination &dest, const std::string &key, const std::string &value)
{
m_address_book[dest].destdata.insert(std::make_pair(key, value));
}
bool CWallet::GetDestData(const CTxDestination &dest, const std::string &key, std::string *value) const
{
std::map<CTxDestination, CAddressBookData>::const_iterator i = m_address_book.find(dest);
if(i != m_address_book.end())
{
CAddressBookData::StringMap::const_iterator j = i->second.destdata.find(key);
if(j != i->second.destdata.end())
{
if(value)
*value = j->second;
return true;
}
}
return false;
}
std::vector<std::string> CWallet::GetDestValues(const std::string& prefix) const
{
std::vector<std::string> values;
for (const auto& address : m_address_book) {
for (const auto& data : address.second.destdata) {
if (!data.first.compare(0, prefix.size(), prefix)) {
values.emplace_back(data.second);
}
}
}
return values;
}
bool CWallet::Verify(interfaces::Chain& chain, const WalletLocation& location, bool salvage_wallet, std::string& error_string, std::vector<std::string>& warnings)
{
// Do some checking on wallet path. It should be either a:
//
// 1. Path where a directory can be created.
// 2. Path to an existing directory.
// 3. Path to a symlink to a directory.
// 4. For backwards compatibility, the name of a data file in -walletdir.
LOCK(cs_wallets);
const fs::path& wallet_path = location.GetPath();
fs::file_type path_type = fs::symlink_status(wallet_path).type();
if (!(path_type == fs::file_not_found || path_type == fs::directory_file ||
(path_type == fs::symlink_file && fs::is_directory(wallet_path)) ||
(path_type == fs::regular_file && fs::path(location.GetName()).filename() == location.GetName()))) {
error_string = strprintf(
"Invalid -wallet path '%s'. -wallet path should point to a directory where wallet.dat and "
"database/log.?????????? files can be stored, a location where such a directory could be created, "
"or (for backwards compatibility) the name of an existing data file in -walletdir (%s)",
location.GetName(), GetWalletDir());
return false;
}
// Make sure that the wallet path doesn't clash with an existing wallet path
if (IsWalletLoaded(wallet_path)) {
error_string = strprintf("Error loading wallet %s. Duplicate -wallet filename specified.", location.GetName());
return false;
}
// Keep same database environment instance across Verify/Recover calls below.
std::unique_ptr<WalletDatabase> database = WalletDatabase::Create(wallet_path);
try {
if (!WalletBatch::VerifyEnvironment(wallet_path, error_string)) {
return false;
}
} catch (const fs::filesystem_error& e) {
error_string = strprintf("Error loading wallet %s. %s", location.GetName(), fsbridge::get_filesystem_error_message(e));
return false;
}
if (salvage_wallet) {
// Recover readable keypairs:
CWallet dummyWallet(&chain, WalletLocation(), WalletDatabase::CreateDummy());
std::string backup_filename;
// Even if we don't use this lock in this function, we want to preserve
// lock order in LoadToWallet if query of chain state is needed to know
// tx status. If lock can't be taken, tx confirmation status may be not
// reliable.
auto locked_chain = dummyWallet.LockChain();
if (!WalletBatch::Recover(wallet_path, (void *)&dummyWallet, WalletBatch::RecoverKeysOnlyFilter, backup_filename)) {
return false;
}
}
return WalletBatch::VerifyDatabaseFile(wallet_path, warnings, error_string);
}
std::shared_ptr<CWallet> CWallet::CreateWalletFromFile(interfaces::Chain& chain, const WalletLocation& location, std::string& error, std::vector<std::string>& warnings, uint64_t wallet_creation_flags)
{
const std::string walletFile = WalletDataFilePath(location.GetPath()).string();
// needed to restore wallet transaction meta data after -zapwallettxes
std::vector<CWalletTx> vWtx;
if (gArgs.GetBoolArg("-zapwallettxes", false)) {
chain.initMessage(_("Zapping all transactions from wallet...").translated);
std::unique_ptr<CWallet> tempWallet = MakeUnique<CWallet>(&chain, location, WalletDatabase::Create(location.GetPath()));
DBErrors nZapWalletRet = tempWallet->ZapWalletTx(vWtx);
if (nZapWalletRet != DBErrors::LOAD_OK) {
error = strprintf(_("Error loading %s: Wallet corrupted").translated, walletFile);
return nullptr;
}
}
chain.initMessage(_("Loading wallet...").translated);
int64_t nStart = GetTimeMillis();
bool fFirstRun = true;
// TODO: Can't use std::make_shared because we need a custom deleter but
// should be possible to use std::allocate_shared.
std::shared_ptr<CWallet> walletInstance(new CWallet(&chain, location, WalletDatabase::Create(location.GetPath())), ReleaseWallet);
DBErrors nLoadWalletRet = walletInstance->LoadWallet(fFirstRun);
if (nLoadWalletRet != DBErrors::LOAD_OK) {
if (nLoadWalletRet == DBErrors::CORRUPT) {
error = strprintf(_("Error loading %s: Wallet corrupted").translated, walletFile);
return nullptr;
}
else if (nLoadWalletRet == DBErrors::NONCRITICAL_ERROR)
{
warnings.push_back(strprintf(_("Error reading %s! All keys read correctly, but transaction data"
" or address book entries might be missing or incorrect.").translated,
walletFile));
}
else if (nLoadWalletRet == DBErrors::TOO_NEW) {
error = strprintf(_("Error loading %s: Wallet requires newer version of %s").translated, walletFile, PACKAGE_NAME);
return nullptr;
}
else if (nLoadWalletRet == DBErrors::NEED_REWRITE)
{
error = strprintf(_("Wallet needed to be rewritten: restart %s to complete").translated, PACKAGE_NAME);
return nullptr;
}
else {
error = strprintf(_("Error loading %s").translated, walletFile);
return nullptr;
}
}
int prev_version = walletInstance->GetVersion();
if (gArgs.GetBoolArg("-upgradewallet", fFirstRun))
{
int nMaxVersion = gArgs.GetArg("-upgradewallet", 0);
if (nMaxVersion == 0) // the -upgradewallet without argument case
{
walletInstance->WalletLogPrintf("Performing wallet upgrade to %i\n", FEATURE_LATEST);
nMaxVersion = FEATURE_LATEST;
walletInstance->SetMinVersion(FEATURE_LATEST); // permanently upgrade the wallet immediately
}
else
walletInstance->WalletLogPrintf("Allowing wallet upgrade up to %i\n", nMaxVersion);
if (nMaxVersion < walletInstance->GetVersion())
{
error = _("Cannot downgrade wallet").translated;
return nullptr;
}
walletInstance->SetMaxVersion(nMaxVersion);
}
// Upgrade to HD if explicit upgrade
if (gArgs.GetBoolArg("-upgradewallet", false)) {
LOCK(walletInstance->cs_wallet);
// Do not upgrade versions to any version between HD_SPLIT and FEATURE_PRE_SPLIT_KEYPOOL unless already supporting HD_SPLIT
int max_version = walletInstance->GetVersion();
if (!walletInstance->CanSupportFeature(FEATURE_HD_SPLIT) && max_version >= FEATURE_HD_SPLIT && max_version < FEATURE_PRE_SPLIT_KEYPOOL) {
error = _("Cannot upgrade a non HD split wallet without upgrading to support pre split keypool. Please use -upgradewallet=169900 or -upgradewallet with no version specified.").translated;
return nullptr;
}
for (auto spk_man : walletInstance->GetActiveScriptPubKeyMans()) {
if (!spk_man->Upgrade(prev_version, error)) {
return nullptr;
}
}
}
if (fFirstRun)
{
// ensure this wallet.dat can only be opened by clients supporting HD with chain split and expects no default key
walletInstance->SetMinVersion(FEATURE_LATEST);
walletInstance->SetWalletFlags(wallet_creation_flags, false);
// Always create LegacyScriptPubKeyMan for now
walletInstance->SetupLegacyScriptPubKeyMan();
if (!(wallet_creation_flags & (WALLET_FLAG_DISABLE_PRIVATE_KEYS | WALLET_FLAG_BLANK_WALLET))) {
LOCK(walletInstance->cs_wallet);
for (auto spk_man : walletInstance->GetActiveScriptPubKeyMans()) {
if (!spk_man->SetupGeneration()) {
error = _("Unable to generate initial keys").translated;
return nullptr;
}
}
}
auto locked_chain = chain.lock();
walletInstance->chainStateFlushed(locked_chain->getTipLocator());
} else if (wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS) {
// Make it impossible to disable private keys after creation
error = strprintf(_("Error loading %s: Private keys can only be disabled during creation").translated, walletFile);
return NULL;
} else if (walletInstance->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
for (auto spk_man : walletInstance->GetActiveScriptPubKeyMans()) {
if (spk_man->HavePrivateKeys()) {
warnings.push_back(strprintf(_("Warning: Private keys detected in wallet {%s} with disabled private keys").translated, walletFile));
break;
}
}
}
if (!gArgs.GetArg("-addresstype", "").empty() && !ParseOutputType(gArgs.GetArg("-addresstype", ""), walletInstance->m_default_address_type)) {
error = strprintf(_("Unknown address type '%s'").translated, gArgs.GetArg("-addresstype", ""));
return nullptr;
}
if (!gArgs.GetArg("-changetype", "").empty() && !ParseOutputType(gArgs.GetArg("-changetype", ""), walletInstance->m_default_change_type)) {
error = strprintf(_("Unknown change type '%s'").translated, gArgs.GetArg("-changetype", ""));
return nullptr;
}
if (gArgs.IsArgSet("-mintxfee")) {
CAmount n = 0;
if (!ParseMoney(gArgs.GetArg("-mintxfee", ""), n) || 0 == n) {
error = AmountErrMsg("mintxfee", gArgs.GetArg("-mintxfee", "")).translated;
return nullptr;
}
if (n > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-mintxfee").translated + " " +
_("This is the minimum transaction fee you pay on every transaction.").translated);
}
walletInstance->m_min_fee = CFeeRate(n);
}
if (gArgs.IsArgSet("-fallbackfee")) {
CAmount nFeePerK = 0;
if (!ParseMoney(gArgs.GetArg("-fallbackfee", ""), nFeePerK)) {
error = strprintf(_("Invalid amount for -fallbackfee=<amount>: '%s'").translated, gArgs.GetArg("-fallbackfee", ""));
return nullptr;
}
if (nFeePerK > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-fallbackfee").translated + " " +
_("This is the transaction fee you may pay when fee estimates are not available.").translated);
}
walletInstance->m_fallback_fee = CFeeRate(nFeePerK);
}
// Disable fallback fee in case value was set to 0, enable if non-null value
walletInstance->m_allow_fallback_fee = walletInstance->m_fallback_fee.GetFeePerK() != 0;
if (gArgs.IsArgSet("-discardfee")) {
CAmount nFeePerK = 0;
if (!ParseMoney(gArgs.GetArg("-discardfee", ""), nFeePerK)) {
error = strprintf(_("Invalid amount for -discardfee=<amount>: '%s'").translated, gArgs.GetArg("-discardfee", ""));
return nullptr;
}
if (nFeePerK > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-discardfee").translated + " " +
_("This is the transaction fee you may discard if change is smaller than dust at this level").translated);
}
walletInstance->m_discard_rate = CFeeRate(nFeePerK);
}
if (gArgs.IsArgSet("-paytxfee")) {
CAmount nFeePerK = 0;
if (!ParseMoney(gArgs.GetArg("-paytxfee", ""), nFeePerK)) {
error = AmountErrMsg("paytxfee", gArgs.GetArg("-paytxfee", "")).translated;
return nullptr;
}
if (nFeePerK > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-paytxfee").translated + " " +
_("This is the transaction fee you will pay if you send a transaction.").translated);
}
walletInstance->m_pay_tx_fee = CFeeRate(nFeePerK, 1000);
if (walletInstance->m_pay_tx_fee < chain.relayMinFee()) {
error = strprintf(_("Invalid amount for -paytxfee=<amount>: '%s' (must be at least %s)").translated,
gArgs.GetArg("-paytxfee", ""), chain.relayMinFee().ToString());
return nullptr;
}
}
if (gArgs.IsArgSet("-maxtxfee")) {
CAmount nMaxFee = 0;
if (!ParseMoney(gArgs.GetArg("-maxtxfee", ""), nMaxFee)) {
error = AmountErrMsg("maxtxfee", gArgs.GetArg("-maxtxfee", "")).translated;
return nullptr;
}
if (nMaxFee > HIGH_MAX_TX_FEE) {
warnings.push_back(_("-maxtxfee is set very high! Fees this large could be paid on a single transaction.").translated);
}
if (CFeeRate(nMaxFee, 1000) < chain.relayMinFee()) {
error = strprintf(_("Invalid amount for -maxtxfee=<amount>: '%s' (must be at least the minrelay fee of %s to prevent stuck transactions)").translated,
gArgs.GetArg("-maxtxfee", ""), chain.relayMinFee().ToString());
return nullptr;
}
walletInstance->m_default_max_tx_fee = nMaxFee;
}
if (chain.relayMinFee().GetFeePerK() > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-minrelaytxfee").translated + " " +
_("The wallet will avoid paying less than the minimum relay fee.").translated);
}
walletInstance->m_confirm_target = gArgs.GetArg("-txconfirmtarget", DEFAULT_TX_CONFIRM_TARGET);
walletInstance->m_spend_zero_conf_change = gArgs.GetBoolArg("-spendzeroconfchange", DEFAULT_SPEND_ZEROCONF_CHANGE);
walletInstance->m_signal_rbf = gArgs.GetBoolArg("-walletrbf", DEFAULT_WALLET_RBF);
walletInstance->WalletLogPrintf("Wallet completed loading in %15dms\n", GetTimeMillis() - nStart);
// Try to top up keypool. No-op if the wallet is locked.
walletInstance->TopUpKeyPool();
auto locked_chain = chain.lock();
LOCK(walletInstance->cs_wallet);
int rescan_height = 0;
if (!gArgs.GetBoolArg("-rescan", false))
{
WalletBatch batch(*walletInstance->database);
CBlockLocator locator;
if (batch.ReadBestBlock(locator)) {
if (const Optional<int> fork_height = locked_chain->findLocatorFork(locator)) {
rescan_height = *fork_height;
}
}
}
const Optional<int> tip_height = locked_chain->getHeight();
if (tip_height) {
walletInstance->m_last_block_processed = locked_chain->getBlockHash(*tip_height);
walletInstance->m_last_block_processed_height = *tip_height;
} else {
walletInstance->m_last_block_processed.SetNull();
walletInstance->m_last_block_processed_height = -1;
}
if (tip_height && *tip_height != rescan_height)
{
// We can't rescan beyond non-pruned blocks, stop and throw an error.
// This might happen if a user uses an old wallet within a pruned node
// or if they ran -disablewallet for a longer time, then decided to re-enable
if (chain.havePruned()) {
// Exit early and print an error.
// If a block is pruned after this check, we will load the wallet,
// but fail the rescan with a generic error.
int block_height = *tip_height;
while (block_height > 0 && locked_chain->haveBlockOnDisk(block_height - 1) && rescan_height != block_height) {
--block_height;
}
if (rescan_height != block_height) {
error = _("Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node)").translated;
return nullptr;
}
}
chain.initMessage(_("Rescanning...").translated);
walletInstance->WalletLogPrintf("Rescanning last %i blocks (from block %i)...\n", *tip_height - rescan_height, rescan_height);
// No need to read and scan block if block was created before
// our wallet birthday (as adjusted for block time variability)
// The way the 'time_first_key' is initialized is just a workaround for the gcc bug #47679 since version 4.6.0.
Optional<int64_t> time_first_key = MakeOptional(false, int64_t());;
for (auto spk_man : walletInstance->GetAllScriptPubKeyMans()) {
int64_t time = spk_man->GetTimeFirstKey();
if (!time_first_key || time < *time_first_key) time_first_key = time;
}
if (time_first_key) {
if (Optional<int> first_block = locked_chain->findFirstBlockWithTimeAndHeight(*time_first_key - TIMESTAMP_WINDOW, rescan_height, nullptr)) {
rescan_height = *first_block;
}
}
{
WalletRescanReserver reserver(walletInstance.get());
if (!reserver.reserve() || (ScanResult::SUCCESS != walletInstance->ScanForWalletTransactions(locked_chain->getBlockHash(rescan_height), {} /* stop block */, reserver, true /* update */).status)) {
error = _("Failed to rescan the wallet during initialization").translated;
return nullptr;
}
}
walletInstance->chainStateFlushed(locked_chain->getTipLocator());
walletInstance->database->IncrementUpdateCounter();
// Restore wallet transaction metadata after -zapwallettxes=1
if (gArgs.GetBoolArg("-zapwallettxes", false) && gArgs.GetArg("-zapwallettxes", "1") != "2")
{
WalletBatch batch(*walletInstance->database);
for (const CWalletTx& wtxOld : vWtx)
{
uint256 hash = wtxOld.GetHash();
std::map<uint256, CWalletTx>::iterator mi = walletInstance->mapWallet.find(hash);
if (mi != walletInstance->mapWallet.end())
{
const CWalletTx* copyFrom = &wtxOld;
CWalletTx* copyTo = &mi->second;
copyTo->mapValue = copyFrom->mapValue;
copyTo->vOrderForm = copyFrom->vOrderForm;
copyTo->nTimeReceived = copyFrom->nTimeReceived;
copyTo->nTimeSmart = copyFrom->nTimeSmart;
copyTo->fFromMe = copyFrom->fFromMe;
copyTo->nOrderPos = copyFrom->nOrderPos;
batch.WriteTx(*copyTo);
}
}
}
}
{
LOCK(cs_wallets);
for (auto& load_wallet : g_load_wallet_fns) {
load_wallet(interfaces::MakeWallet(walletInstance));
}
}
// Register with the validation interface. It's ok to do this after rescan since we're still holding locked_chain.
walletInstance->m_chain_notifications_handler = walletInstance->chain().handleNotifications(walletInstance);
walletInstance->SetBroadcastTransactions(gArgs.GetBoolArg("-walletbroadcast", DEFAULT_WALLETBROADCAST));
{
walletInstance->WalletLogPrintf("setKeyPool.size() = %u\n", walletInstance->GetKeyPoolSize());
walletInstance->WalletLogPrintf("mapWallet.size() = %u\n", walletInstance->mapWallet.size());
walletInstance->WalletLogPrintf("m_address_book.size() = %u\n", walletInstance->m_address_book.size());
}
return walletInstance;
}
const CAddressBookData* CWallet::FindAddressBookEntry(const CTxDestination& dest, bool allow_change) const
{
const auto& address_book_it = m_address_book.find(dest);
if (address_book_it == m_address_book.end()) return nullptr;
if ((!allow_change) && address_book_it->second.IsChange()) {
return nullptr;
}
return &address_book_it->second;
}
void CWallet::postInitProcess()
{
auto locked_chain = chain().lock();
LOCK(cs_wallet);
// Add wallet transactions that aren't already in a block to mempool
// Do this here as mempool requires genesis block to be loaded
ReacceptWalletTransactions();
// Update wallet transactions with current mempool transactions.
chain().requestMempoolTransactions(*this);
}
bool CWallet::BackupWallet(const std::string& strDest) const
{
return database->Backup(strDest);
}
CKeyPool::CKeyPool()
{
nTime = GetTime();
fInternal = false;
m_pre_split = false;
}
CKeyPool::CKeyPool(const CPubKey& vchPubKeyIn, bool internalIn)
{
nTime = GetTime();
vchPubKey = vchPubKeyIn;
fInternal = internalIn;
m_pre_split = false;
}
int CWalletTx::GetDepthInMainChain() const
{
assert(pwallet != nullptr);
AssertLockHeld(pwallet->cs_wallet);
if (isUnconfirmed() || isAbandoned()) return 0;
return (pwallet->GetLastBlockHeight() - m_confirm.block_height + 1) * (isConflicted() ? -1 : 1);
}
int CWalletTx::GetBlocksToMaturity() const
{
if (!IsCoinBase())
return 0;
int chain_depth = GetDepthInMainChain();
assert(chain_depth >= 0); // coinbase tx should not be conflicted
return std::max(0, (COINBASE_MATURITY+1) - chain_depth);
}
bool CWalletTx::IsImmatureCoinBase() const
{
// note GetBlocksToMaturity is 0 for non-coinbase tx
return GetBlocksToMaturity() > 0;
}
std::vector<OutputGroup> CWallet::GroupOutputs(const std::vector<COutput>& outputs, bool single_coin) const {
std::vector<OutputGroup> groups;
std::map<CTxDestination, OutputGroup> gmap;
CTxDestination dst;
for (const auto& output : outputs) {
if (output.fSpendable) {
CInputCoin input_coin = output.GetInputCoin();
size_t ancestors, descendants;
chain().getTransactionAncestry(output.tx->GetHash(), ancestors, descendants);
if (!single_coin && ExtractDestination(output.tx->tx->vout[output.i].scriptPubKey, dst)) {
// Limit output groups to no more than 10 entries, to protect
// against inadvertently creating a too-large transaction
// when using -avoidpartialspends
if (gmap[dst].m_outputs.size() >= OUTPUT_GROUP_MAX_ENTRIES) {
groups.push_back(gmap[dst]);
gmap.erase(dst);
}
gmap[dst].Insert(input_coin, output.nDepth, output.tx->IsFromMe(ISMINE_ALL), ancestors, descendants);
} else {
groups.emplace_back(input_coin, output.nDepth, output.tx->IsFromMe(ISMINE_ALL), ancestors, descendants);
}
}
}
if (!single_coin) {
for (const auto& it : gmap) groups.push_back(it.second);
}
return groups;
}
bool CWallet::IsCrypted() const
{
return HasEncryptionKeys();
}
bool CWallet::IsLocked() const
{
if (!IsCrypted()) {
return false;
}
LOCK(cs_wallet);
return vMasterKey.empty();
}
bool CWallet::Lock()
{
if (!IsCrypted())
return false;
{
LOCK(cs_wallet);
vMasterKey.clear();
}
NotifyStatusChanged(this);
return true;
}
bool CWallet::Unlock(const CKeyingMaterial& vMasterKeyIn, bool accept_no_keys)
{
{
LOCK(cs_wallet);
for (const auto& spk_man_pair : m_spk_managers) {
if (!spk_man_pair.second->CheckDecryptionKey(vMasterKeyIn, accept_no_keys)) {
return false;
}
}
vMasterKey = vMasterKeyIn;
}
NotifyStatusChanged(this);
return true;
}
std::set<ScriptPubKeyMan*> CWallet::GetActiveScriptPubKeyMans() const
{
std::set<ScriptPubKeyMan*> spk_mans;
for (bool internal : {false, true}) {
for (OutputType t : OUTPUT_TYPES) {
auto spk_man = GetScriptPubKeyMan(t, internal);
if (spk_man) {
spk_mans.insert(spk_man);
}
}
}
return spk_mans;
}
std::set<ScriptPubKeyMan*> CWallet::GetAllScriptPubKeyMans() const
{
std::set<ScriptPubKeyMan*> spk_mans;
for (const auto& spk_man_pair : m_spk_managers) {
spk_mans.insert(spk_man_pair.second.get());
}
return spk_mans;
}
ScriptPubKeyMan* CWallet::GetScriptPubKeyMan(const OutputType& type, bool internal) const
{
const std::map<OutputType, ScriptPubKeyMan*>& spk_managers = internal ? m_internal_spk_managers : m_external_spk_managers;
std::map<OutputType, ScriptPubKeyMan*>::const_iterator it = spk_managers.find(type);
if (it == spk_managers.end()) {
WalletLogPrintf("%s scriptPubKey Manager for output type %d does not exist\n", internal ? "Internal" : "External", static_cast<int>(type));
return nullptr;
}
return it->second;
}
std::set<ScriptPubKeyMan*> CWallet::GetScriptPubKeyMans(const CScript& script, SignatureData& sigdata) const
{
std::set<ScriptPubKeyMan*> spk_mans;
for (const auto& spk_man_pair : m_spk_managers) {
if (spk_man_pair.second->CanProvide(script, sigdata)) {
spk_mans.insert(spk_man_pair.second.get());
}
}
return spk_mans;
}
ScriptPubKeyMan* CWallet::GetScriptPubKeyMan(const CScript& script) const
{
SignatureData sigdata;
for (const auto& spk_man_pair : m_spk_managers) {
if (spk_man_pair.second->CanProvide(script, sigdata)) {
return spk_man_pair.second.get();
}
}
return nullptr;
}
ScriptPubKeyMan* CWallet::GetScriptPubKeyMan(const uint256& id) const
{
if (m_spk_managers.count(id) > 0) {
return m_spk_managers.at(id).get();
}
return nullptr;
}
std::unique_ptr<SigningProvider> CWallet::GetSolvingProvider(const CScript& script) const
{
SignatureData sigdata;
return GetSolvingProvider(script, sigdata);
}
std::unique_ptr<SigningProvider> CWallet::GetSolvingProvider(const CScript& script, SignatureData& sigdata) const
{
for (const auto& spk_man_pair : m_spk_managers) {
if (spk_man_pair.second->CanProvide(script, sigdata)) {
return spk_man_pair.second->GetSolvingProvider(script);
}
}
return nullptr;
}
LegacyScriptPubKeyMan* CWallet::GetLegacyScriptPubKeyMan() const
{
// Legacy wallets only have one ScriptPubKeyMan which is a LegacyScriptPubKeyMan.
// Everything in m_internal_spk_managers and m_external_spk_managers point to the same legacyScriptPubKeyMan.
auto it = m_internal_spk_managers.find(OutputType::LEGACY);
if (it == m_internal_spk_managers.end()) return nullptr;
return dynamic_cast<LegacyScriptPubKeyMan*>(it->second);
}
LegacyScriptPubKeyMan* CWallet::GetOrCreateLegacyScriptPubKeyMan()
{
SetupLegacyScriptPubKeyMan();
return GetLegacyScriptPubKeyMan();
}
void CWallet::SetupLegacyScriptPubKeyMan()
{
if (!m_internal_spk_managers.empty() || !m_external_spk_managers.empty() || !m_spk_managers.empty()) {
return;
}
auto spk_manager = std::unique_ptr<ScriptPubKeyMan>(new LegacyScriptPubKeyMan(*this));
for (const auto& type : OUTPUT_TYPES) {
m_internal_spk_managers[type] = spk_manager.get();
m_external_spk_managers[type] = spk_manager.get();
}
m_spk_managers[spk_manager->GetID()] = std::move(spk_manager);
}
const CKeyingMaterial& CWallet::GetEncryptionKey() const
{
return vMasterKey;
}
bool CWallet::HasEncryptionKeys() const
{
return !mapMasterKeys.empty();
}
void CWallet::ConnectScriptPubKeyManNotifiers()
{
for (const auto& spk_man : GetActiveScriptPubKeyMans()) {
spk_man->NotifyWatchonlyChanged.connect(NotifyWatchonlyChanged);
spk_man->NotifyCanGetAddressesChanged.connect(NotifyCanGetAddressesChanged);
}
}