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|
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2021 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/amount.h>
#include <consensus/consensus.h>
#include <consensus/validation.h>
#include <external_signer.h>
#include <fs.h>
#include <interfaces/chain.h>
#include <interfaces/wallet.h>
#include <key.h>
#include <key_io.h>
#include <outputtype.h>
#include <policy/fees.h>
#include <policy/policy.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <psbt.h>
#include <script/descriptor.h>
#include <script/script.h>
#include <script/signingprovider.h>
#include <txmempool.h>
#include <util/bip32.h>
#include <util/check.h>
#include <util/error.h>
#include <util/fees.h>
#include <util/moneystr.h>
#include <util/rbf.h>
#include <util/string.h>
#include <util/translation.h>
#include <wallet/coincontrol.h>
#include <wallet/context.h>
#include <wallet/fees.h>
#include <wallet/external_signer_scriptpubkeyman.h>
#include <univalue.h>
#include <algorithm>
#include <assert.h>
#include <optional>
using interfaces::FoundBlock;
namespace wallet {
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."
},
};
bool AddWalletSetting(interfaces::Chain& chain, const std::string& wallet_name)
{
util::SettingsValue setting_value = chain.getRwSetting("wallet");
if (!setting_value.isArray()) setting_value.setArray();
for (const util::SettingsValue& value : setting_value.getValues()) {
if (value.isStr() && value.get_str() == wallet_name) return true;
}
setting_value.push_back(wallet_name);
return chain.updateRwSetting("wallet", setting_value);
}
bool RemoveWalletSetting(interfaces::Chain& chain, const std::string& wallet_name)
{
util::SettingsValue setting_value = chain.getRwSetting("wallet");
if (!setting_value.isArray()) return true;
util::SettingsValue new_value(util::SettingsValue::VARR);
for (const util::SettingsValue& value : setting_value.getValues()) {
if (!value.isStr() || value.get_str() != wallet_name) new_value.push_back(value);
}
if (new_value.size() == setting_value.size()) return true;
return chain.updateRwSetting("wallet", new_value);
}
static void UpdateWalletSetting(interfaces::Chain& chain,
const std::string& wallet_name,
std::optional<bool> load_on_startup,
std::vector<bilingual_str>& warnings)
{
if (!load_on_startup) return;
if (load_on_startup.value() && !AddWalletSetting(chain, wallet_name)) {
warnings.emplace_back(Untranslated("Wallet load on startup setting could not be updated, so wallet may not be loaded next node startup."));
} else if (!load_on_startup.value() && !RemoveWalletSetting(chain, wallet_name)) {
warnings.emplace_back(Untranslated("Wallet load on startup setting could not be updated, so wallet may still be loaded next node startup."));
}
}
/**
* Refresh mempool status so the wallet is in an internally consistent state and
* immediately knows the transaction's status: Whether it can be considered
* trusted and is eligible to be abandoned ...
*/
static void RefreshMempoolStatus(CWalletTx& tx, interfaces::Chain& chain)
{
if (chain.isInMempool(tx.GetHash())) {
tx.m_state = TxStateInMempool();
} else if (tx.state<TxStateInMempool>()) {
tx.m_state = TxStateInactive();
}
}
bool AddWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet)
{
LOCK(context.wallets_mutex);
assert(wallet);
std::vector<std::shared_ptr<CWallet>>::const_iterator i = std::find(context.wallets.begin(), context.wallets.end(), wallet);
if (i != context.wallets.end()) return false;
context.wallets.push_back(wallet);
wallet->ConnectScriptPubKeyManNotifiers();
wallet->NotifyCanGetAddressesChanged();
return true;
}
bool RemoveWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet, std::optional<bool> load_on_start, std::vector<bilingual_str>& warnings)
{
assert(wallet);
interfaces::Chain& chain = wallet->chain();
std::string name = wallet->GetName();
// Unregister with the validation interface which also drops shared ponters.
wallet->m_chain_notifications_handler.reset();
LOCK(context.wallets_mutex);
std::vector<std::shared_ptr<CWallet>>::iterator i = std::find(context.wallets.begin(), context.wallets.end(), wallet);
if (i == context.wallets.end()) return false;
context.wallets.erase(i);
// Write the wallet setting
UpdateWalletSetting(chain, name, load_on_start, warnings);
return true;
}
bool RemoveWallet(WalletContext& context, const std::shared_ptr<CWallet>& wallet, std::optional<bool> load_on_start)
{
std::vector<bilingual_str> warnings;
return RemoveWallet(context, wallet, load_on_start, warnings);
}
std::vector<std::shared_ptr<CWallet>> GetWallets(WalletContext& context)
{
LOCK(context.wallets_mutex);
return context.wallets;
}
std::shared_ptr<CWallet> GetWallet(WalletContext& context, const std::string& name)
{
LOCK(context.wallets_mutex);
for (const std::shared_ptr<CWallet>& wallet : context.wallets) {
if (wallet->GetName() == name) return wallet;
}
return nullptr;
}
std::unique_ptr<interfaces::Handler> HandleLoadWallet(WalletContext& context, LoadWalletFn load_wallet)
{
LOCK(context.wallets_mutex);
auto it = context.wallet_load_fns.emplace(context.wallet_load_fns.end(), std::move(load_wallet));
return interfaces::MakeHandler([&context, it] { LOCK(context.wallets_mutex); context.wallet_load_fns.erase(it); });
}
void NotifyWalletLoaded(WalletContext& context, const std::shared_ptr<CWallet>& wallet)
{
LOCK(context.wallets_mutex);
for (auto& load_wallet : context.wallet_load_fns) {
load_wallet(interfaces::MakeWallet(context, wallet));
}
}
static GlobalMutex g_loading_wallet_mutex;
static GlobalMutex g_wallet_release_mutex;
static std::condition_variable g_wallet_release_cv;
static std::set<std::string> g_loading_wallet_set GUARDED_BY(g_loading_wallet_mutex);
static std::set<std::string> g_unloading_wallet_set GUARDED_BY(g_wallet_release_mutex);
// 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);
}
}
}
namespace {
std::shared_ptr<CWallet> LoadWalletInternal(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
try {
std::unique_ptr<WalletDatabase> database = MakeWalletDatabase(name, options, status, error);
if (!database) {
error = Untranslated("Wallet file verification failed.") + Untranslated(" ") + error;
return nullptr;
}
context.chain->initMessage(_("Loading wallet…").translated);
const std::shared_ptr<CWallet> wallet = CWallet::Create(context, name, std::move(database), options.create_flags, error, warnings);
if (!wallet) {
error = Untranslated("Wallet loading failed.") + Untranslated(" ") + error;
status = DatabaseStatus::FAILED_LOAD;
return nullptr;
}
NotifyWalletLoaded(context, wallet);
AddWallet(context, wallet);
wallet->postInitProcess();
// Write the wallet setting
UpdateWalletSetting(*context.chain, name, load_on_start, warnings);
return wallet;
} catch (const std::runtime_error& e) {
error = Untranslated(e.what());
status = DatabaseStatus::FAILED_LOAD;
return nullptr;
}
}
} // namespace
std::shared_ptr<CWallet> LoadWallet(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
auto result = WITH_LOCK(g_loading_wallet_mutex, return g_loading_wallet_set.insert(name));
if (!result.second) {
error = Untranslated("Wallet already loading.");
status = DatabaseStatus::FAILED_LOAD;
return nullptr;
}
auto wallet = LoadWalletInternal(context, name, load_on_start, options, status, error, warnings);
WITH_LOCK(g_loading_wallet_mutex, g_loading_wallet_set.erase(result.first));
return wallet;
}
std::shared_ptr<CWallet> CreateWallet(WalletContext& context, const std::string& name, std::optional<bool> load_on_start, DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
uint64_t wallet_creation_flags = options.create_flags;
const SecureString& passphrase = options.create_passphrase;
if (wallet_creation_flags & WALLET_FLAG_DESCRIPTORS) options.require_format = DatabaseFormat::SQLITE;
// 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;
}
// Private keys must be disabled for an external signer wallet
if ((wallet_creation_flags & WALLET_FLAG_EXTERNAL_SIGNER) && !(wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
error = Untranslated("Private keys must be disabled when using an external signer");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Descriptor support must be enabled for an external signer wallet
if ((wallet_creation_flags & WALLET_FLAG_EXTERNAL_SIGNER) && !(wallet_creation_flags & WALLET_FLAG_DESCRIPTORS)) {
error = Untranslated("Descriptor support must be enabled when using an external signer");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Do not allow a passphrase when private keys are disabled
if (!passphrase.empty() && (wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
error = Untranslated("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.");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Wallet::Verify will check if we're trying to create a wallet with a duplicate name.
std::unique_ptr<WalletDatabase> database = MakeWalletDatabase(name, options, status, error);
if (!database) {
error = Untranslated("Wallet file verification failed.") + Untranslated(" ") + error;
status = DatabaseStatus::FAILED_VERIFY;
return nullptr;
}
// Make the wallet
context.chain->initMessage(_("Loading wallet…").translated);
const std::shared_ptr<CWallet> wallet = CWallet::Create(context, name, std::move(database), wallet_creation_flags, error, warnings);
if (!wallet) {
error = Untranslated("Wallet creation failed.") + Untranslated(" ") + error;
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
// Encrypt the wallet
if (!passphrase.empty() && !(wallet_creation_flags & WALLET_FLAG_DISABLE_PRIVATE_KEYS)) {
if (!wallet->EncryptWallet(passphrase)) {
error = Untranslated("Error: Wallet created but failed to encrypt.");
status = DatabaseStatus::FAILED_ENCRYPT;
return nullptr;
}
if (!create_blank) {
// Unlock the wallet
if (!wallet->Unlock(passphrase)) {
error = Untranslated("Error: Wallet was encrypted but could not be unlocked");
status = DatabaseStatus::FAILED_ENCRYPT;
return nullptr;
}
// Set a seed for the wallet
{
LOCK(wallet->cs_wallet);
if (wallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
wallet->SetupDescriptorScriptPubKeyMans();
} else {
for (auto spk_man : wallet->GetActiveScriptPubKeyMans()) {
if (!spk_man->SetupGeneration()) {
error = Untranslated("Unable to generate initial keys");
status = DatabaseStatus::FAILED_CREATE;
return nullptr;
}
}
}
}
// Relock the wallet
wallet->Lock();
}
}
NotifyWalletLoaded(context, wallet);
AddWallet(context, wallet);
wallet->postInitProcess();
// Write the wallet settings
UpdateWalletSetting(*context.chain, name, load_on_start, warnings);
// Legacy wallets are being deprecated, warn if a newly created wallet is legacy
if (!(wallet_creation_flags & WALLET_FLAG_DESCRIPTORS)) {
warnings.push_back(_("Wallet created successfully. The legacy wallet type is being deprecated and support for creating and opening legacy wallets will be removed in the future."));
}
status = DatabaseStatus::SUCCESS;
return wallet;
}
std::shared_ptr<CWallet> RestoreWallet(WalletContext& context, const fs::path& backup_file, const std::string& wallet_name, std::optional<bool> load_on_start, DatabaseStatus& status, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
DatabaseOptions options;
ReadDatabaseArgs(*context.args, options);
options.require_existing = true;
if (!fs::exists(backup_file)) {
error = Untranslated("Backup file does not exist");
status = DatabaseStatus::FAILED_INVALID_BACKUP_FILE;
return nullptr;
}
const fs::path wallet_path = fsbridge::AbsPathJoin(GetWalletDir(), fs::u8path(wallet_name));
if (fs::exists(wallet_path) || !TryCreateDirectories(wallet_path)) {
error = Untranslated(strprintf("Failed to create database path '%s'. Database already exists.", fs::PathToString(wallet_path)));
status = DatabaseStatus::FAILED_ALREADY_EXISTS;
return nullptr;
}
auto wallet_file = wallet_path / "wallet.dat";
fs::copy_file(backup_file, wallet_file, fs::copy_options::none);
auto wallet = LoadWallet(context, wallet_name, load_on_start, options, status, error, warnings);
if (!wallet) {
fs::remove(wallet_file);
fs::remove(wallet_path);
}
return wallet;
}
/** @defgroup mapWallet
*
* @{
*/
const CWalletTx* CWallet::GetWalletTx(const uint256& hash) const
{
AssertLockHeld(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);
}
void CWallet::UpgradeDescriptorCache()
{
if (!IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS) || IsLocked() || IsWalletFlagSet(WALLET_FLAG_LAST_HARDENED_XPUB_CACHED)) {
return;
}
for (ScriptPubKeyMan* spkm : GetAllScriptPubKeyMans()) {
DescriptorScriptPubKeyMan* desc_spkm = dynamic_cast<DescriptorScriptPubKeyMan*>(spkm);
desc_spkm->UpgradeDescriptorCache();
}
SetWalletFlag(WALLET_FLAG_LAST_HARDENED_XPUB_CACHED);
}
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();
// Now that we've unlocked, upgrade the descriptor cache
UpgradeDescriptorCache();
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(GetDatabase()).WriteMasterKey(pMasterKey.first, pMasterKey.second);
if (fWasLocked)
Lock();
return true;
}
}
}
return false;
}
void CWallet::chainStateFlushed(const CBlockLocator& loc)
{
// Don't update the best block until the chain is attached so that in case of a shutdown,
// the rescan will be restarted at next startup.
if (m_attaching_chain) {
return;
}
WalletBatch batch(GetDatabase());
batch.WriteBestBlock(loc);
}
void CWallet::SetMinVersion(enum WalletFeature nVersion, WalletBatch* batch_in)
{
LOCK(cs_wallet);
if (nWalletVersion >= nVersion)
return;
nWalletVersion = nVersion;
{
WalletBatch* batch = batch_in ? batch_in : new WalletBatch(GetDatabase());
if (nWalletVersion > 40000)
batch->WriteMinVersion(nWalletVersion);
if (!batch_in)
delete batch;
}
}
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()
{
GetDatabase().Flush();
}
void CWallet::Close()
{
GetDatabase().Close();
}
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 COutPoint& outpoint) const
{
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 = GetTxDepthInMainChain(mit->second);
if (depth > 0 || (depth == 0 && !mit->second.isAbandoned()))
return true; // Spent
}
}
return false;
}
void CWallet::AddToSpends(const COutPoint& outpoint, const uint256& wtxid, WalletBatch* batch)
{
mapTxSpends.insert(std::make_pair(outpoint, wtxid));
if (batch) {
UnlockCoin(outpoint, batch);
} else {
WalletBatch temp_batch(GetDatabase());
UnlockCoin(outpoint, &temp_batch);
}
std::pair<TxSpends::iterator, TxSpends::iterator> range;
range = mapTxSpends.equal_range(outpoint);
SyncMetaData(range);
}
void CWallet::AddToSpends(const CWalletTx& wtx, WalletBatch* batch)
{
if (wtx.IsCoinBase()) // Coinbases don't spend anything!
return;
for (const CTxIn& txin : wtx.tx->vin)
AddToSpends(txin.prevout, wtx.GetHash(), batch);
}
bool CWallet::EncryptWallet(const SecureString& strWalletPassphrase)
{
if (IsCrypted())
return false;
CKeyingMaterial _vMasterKey;
_vMasterKey.resize(WALLET_CRYPTO_KEY_SIZE);
GetStrongRandBytes(_vMasterKey);
CMasterKey kMasterKey;
kMasterKey.vchSalt.resize(WALLET_CRYPTO_SALT_SIZE);
GetStrongRandBytes(kMasterKey.vchSalt);
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(GetDatabase());
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);
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 descriptors, make new descriptors with a new seed
if (IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS) && !IsWalletFlagSet(WALLET_FLAG_BLANK_WALLET)) {
SetupDescriptorScriptPubKeyMans();
} else if (auto spk_man = GetLegacyScriptPubKeyMan()) {
// if we are using HD, replace the HD seed with a new one
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.
GetDatabase().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:
GetDatabase().ReloadDbEnv();
}
NotifyStatusChanged(this);
return true;
}
DBErrors CWallet::ReorderTransactions()
{
LOCK(cs_wallet);
WalletBatch batch(GetDatabase());
// 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(GetDatabase()).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();
// Refresh mempool status without waiting for transactionRemovedFromMempool
RefreshMempoolStatus(wtx, chain());
WalletBatch batch(GetDatabase());
bool success = true;
if (!batch.WriteTx(wtx)) {
WalletLogPrintf("%s: Updating batch tx %s failed\n", __func__, wtx.GetHash().ToString());
success = false;
}
NotifyTransactionChanged(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 != IsAddressUsed(dst)) {
if (used) {
tx_destinations.insert(dst);
}
SetAddressUsed(batch, dst, used);
}
}
}
}
bool CWallet::IsSpentKey(const CScript& scriptPubKey) const
{
AssertLockHeld(cs_wallet);
CTxDestination dest;
if (!ExtractDestination(scriptPubKey, dest)) {
return false;
}
if (IsAddressUsed(dest)) {
return true;
}
if (IsLegacy()) {
LegacyScriptPubKeyMan* spk_man = GetLegacyScriptPubKeyMan();
assert(spk_man != nullptr);
for (const auto& keyid : GetAffectedKeys(scriptPubKey, *spk_man)) {
WitnessV0KeyHash wpkh_dest(keyid);
if (IsAddressUsed(wpkh_dest)) {
return true;
}
ScriptHash sh_wpkh_dest(GetScriptForDestination(wpkh_dest));
if (IsAddressUsed(sh_wpkh_dest)) {
return true;
}
PKHash pkh_dest(keyid);
if (IsAddressUsed(pkh_dest)) {
return true;
}
}
}
return false;
}
CWalletTx* CWallet::AddToWallet(CTransactionRef tx, const TxState& state, const UpdateWalletTxFn& update_wtx, bool fFlushOnClose, bool rescanning_old_block)
{
LOCK(cs_wallet);
WalletBatch batch(GetDatabase(), fFlushOnClose);
uint256 hash = tx->GetHash();
if (IsWalletFlagSet(WALLET_FLAG_AVOID_REUSE)) {
// Mark used destinations
std::set<CTxDestination> tx_destinations;
for (const CTxIn& txin : 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
auto ret = mapWallet.emplace(std::piecewise_construct, std::forward_as_tuple(hash), std::forward_as_tuple(tx, state));
CWalletTx& wtx = (*ret.first).second;
bool fInsertedNew = ret.second;
bool fUpdated = update_wtx && update_wtx(wtx, fInsertedNew);
if (fInsertedNew) {
wtx.nTimeReceived = GetTime();
wtx.nOrderPos = IncOrderPosNext(&batch);
wtx.m_it_wtxOrdered = wtxOrdered.insert(std::make_pair(wtx.nOrderPos, &wtx));
wtx.nTimeSmart = ComputeTimeSmart(wtx, rescanning_old_block);
AddToSpends(wtx, &batch);
}
if (!fInsertedNew)
{
if (state.index() != wtx.m_state.index()) {
wtx.m_state = state;
fUpdated = true;
} else {
assert(TxStateSerializedIndex(wtx.m_state) == TxStateSerializedIndex(state));
assert(TxStateSerializedBlockHash(wtx.m_state) == TxStateSerializedBlockHash(state));
}
// 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 (tx->HasWitness() && !wtx.tx->HasWitness()) {
wtx.SetTx(tx);
fUpdated = true;
}
}
//// debug print
WalletLogPrintf("AddToWallet %s %s%s\n", hash.ToString(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
// Write to disk
if (fInsertedNew || fUpdated)
if (!batch.WriteTx(wtx))
return nullptr;
// Break debit/credit balance caches:
wtx.MarkDirty();
// Notify UI of new or updated transaction
NotifyTransactionChanged(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 = m_args.GetArg("-walletnotify", "");
if (!strCmd.empty())
{
ReplaceAll(strCmd, "%s", hash.GetHex());
if (auto* conf = wtx.state<TxStateConfirmed>())
{
ReplaceAll(strCmd, "%b", conf->confirmed_block_hash.GetHex());
ReplaceAll(strCmd, "%h", ToString(conf->confirmed_block_height));
} else {
ReplaceAll(strCmd, "%b", "unconfirmed");
ReplaceAll(strCmd, "%h", "-1");
}
#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
ReplaceAll(strCmd, "%w", ShellEscape(GetName()));
#endif
std::thread t(runCommand, strCmd);
t.detach(); // thread runs free
}
#endif
return &wtx;
}
bool CWallet::LoadToWallet(const uint256& hash, const UpdateWalletTxFn& fill_wtx)
{
const auto& ins = mapWallet.emplace(std::piecewise_construct, std::forward_as_tuple(hash), std::forward_as_tuple(nullptr, TxStateInactive{}));
CWalletTx& wtx = ins.first->second;
if (!fill_wtx(wtx, ins.second)) {
return false;
}
// If wallet doesn't have a chain (e.g when using bitcoin-wallet tool),
// don't bother to update txn.
if (HaveChain()) {
bool active;
auto lookup_block = [&](const uint256& hash, int& height, TxState& state) {
// 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.
if (!chain().findBlock(hash, FoundBlock().inActiveChain(active).height(height)) || !active) {
state = TxStateInactive{};
}
};
if (auto* conf = wtx.state<TxStateConfirmed>()) {
lookup_block(conf->confirmed_block_hash, conf->confirmed_block_height, wtx.m_state);
} else if (auto* conf = wtx.state<TxStateConflicted>()) {
lookup_block(conf->conflicting_block_hash, conf->conflicting_block_height, wtx.m_state);
}
}
if (/* insertion took place */ ins.second) {
wtx.m_it_wtxOrdered = wtxOrdered.insert(std::make_pair(wtx.nOrderPos, &wtx));
}
AddToSpends(wtx);
for (const CTxIn& txin : wtx.tx->vin) {
auto it = mapWallet.find(txin.prevout.hash);
if (it != mapWallet.end()) {
CWalletTx& prevtx = it->second;
if (auto* prev = prevtx.state<TxStateConflicted>()) {
MarkConflicted(prev->conflicting_block_hash, prev->conflicting_block_height, wtx.GetHash());
}
}
}
return true;
}
bool CWallet::AddToWalletIfInvolvingMe(const CTransactionRef& ptx, const SyncTxState& state, bool fUpdate, bool rescanning_old_block)
{
const CTransaction& tx = *ptx;
{
AssertLockHeld(cs_wallet);
if (auto* conf = std::get_if<TxStateConfirmed>(&state)) {
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(), conf->confirmed_block_hash.ToString(), range.first->second.ToString(), range.first->first.hash.ToString(), range.first->first.n);
MarkConflicted(conf->confirmed_block_hash, conf->confirmed_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 : GetScriptPubKeyMans(txout.scriptPubKey)) {
for (auto &dest : spk_man->MarkUnusedAddresses(txout.scriptPubKey)) {
// If internal flag is not defined try to infer it from the ScriptPubKeyMan
if (!dest.internal.has_value()) {
dest.internal = IsInternalScriptPubKeyMan(spk_man);
}
// skip if can't determine whether it's a receiving address or not
if (!dest.internal.has_value()) continue;
// If this is a receiving address and it's not in the address book yet
// (e.g. it wasn't generated on this node or we're restoring from backup)
// add it to the address book for proper transaction accounting
if (!*dest.internal && !FindAddressBookEntry(dest.dest, /* allow_change= */ false)) {
SetAddressBook(dest.dest, "", "receive");
}
}
}
}
// Block disconnection override an abandoned tx as unconfirmed
// which means user may have to call abandontransaction again
TxState tx_state = std::visit([](auto&& s) -> TxState { return s; }, state);
return AddToWallet(MakeTransactionRef(tx), tx_state, /*update_wtx=*/nullptr, /*fFlushOnClose=*/false, rescanning_old_block);
}
}
return false;
}
bool CWallet::TransactionCanBeAbandoned(const uint256& hashTx) const
{
LOCK(cs_wallet);
const CWalletTx* wtx = GetWalletTx(hashTx);
return wtx && !wtx->isAbandoned() && GetTxDepthInMainChain(*wtx) == 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)
{
LOCK(cs_wallet);
WalletBatch batch(GetDatabase());
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());
const CWalletTx& origtx = it->second;
if (GetTxDepthInMainChain(origtx) != 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 = GetTxDepthInMainChain(wtx);
// 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.m_state = TxStateInactive{/*abandoned=*/true};
wtx.MarkDirty();
batch.WriteTx(wtx);
NotifyTransactionChanged(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)
{
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(GetDatabase(), 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 = GetTxDepthInMainChain(wtx);
if (conflictconfirms < currentconfirm) {
// Block is 'more conflicted' than current confirm; update.
// Mark transaction as conflicted with this block.
wtx.m_state = TxStateConflicted{hashBlock, conflicting_height};
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, const SyncTxState& state, bool update_tx, bool rescanning_old_block)
{
if (!AddToWalletIfInvolvingMe(ptx, state, update_tx, rescanning_old_block))
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& tx, uint64_t mempool_sequence) {
LOCK(cs_wallet);
SyncTransaction(tx, TxStateInMempool{});
auto it = mapWallet.find(tx->GetHash());
if (it != mapWallet.end()) {
RefreshMempoolStatus(it->second, chain());
}
}
void CWallet::transactionRemovedFromMempool(const CTransactionRef& tx, MemPoolRemovalReason reason, uint64_t mempool_sequence) {
LOCK(cs_wallet);
auto it = mapWallet.find(tx->GetHash());
if (it != mapWallet.end()) {
RefreshMempoolStatus(it->second, chain());
}
// Handle transactions that were removed from the mempool because they
// conflict with transactions in a newly connected block.
if (reason == MemPoolRemovalReason::CONFLICT) {
// Trigger external -walletnotify notifications for these transactions.
// Set Status::UNCONFIRMED instead of Status::CONFLICTED for a few reasons:
//
// 1. The transactionRemovedFromMempool callback does not currently
// provide the conflicting block's hash and height, and for backwards
// compatibility reasons it may not be not safe to store conflicted
// wallet transactions with a null block hash. See
// https://github.com/bitcoin/bitcoin/pull/18600#discussion_r420195993.
// 2. For most of these transactions, the wallet's internal conflict
// detection in the blockConnected handler will subsequently call
// MarkConflicted and update them with CONFLICTED status anyway. This
// applies to any wallet transaction that has inputs spent in the
// block, or that has ancestors in the wallet with inputs spent by
// the block.
// 3. Longstanding behavior since the sync implementation in
// https://github.com/bitcoin/bitcoin/pull/9371 and the prior sync
// implementation before that was to mark these transactions
// unconfirmed rather than conflicted.
//
// Nothing described above should be seen as an unchangeable requirement
// when improving this code in the future. The wallet's heuristics for
// distinguishing between conflicted and unconfirmed transactions are
// imperfect, and could be improved in general, see
// https://github.com/bitcoin-core/bitcoin-devwiki/wiki/Wallet-Transaction-Conflict-Tracking
SyncTransaction(tx, TxStateInactive{});
}
}
void CWallet::blockConnected(const CBlock& block, int height)
{
const uint256& block_hash = block.GetHash();
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++) {
SyncTransaction(block.vtx[index], TxStateConfirmed{block_hash, height, static_cast<int>(index)});
transactionRemovedFromMempool(block.vtx[index], MemPoolRemovalReason::BLOCK, 0 /* mempool_sequence */);
}
}
void CWallet::blockDisconnected(const CBlock& block, int height)
{
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) {
SyncTransaction(ptx, TxStateInactive{});
}
}
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
// chain().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);
}
// 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
{
AssertLockHeld(cs_wallet);
return IsMine(txout.scriptPubKey);
}
isminetype CWallet::IsMine(const CTxDestination& dest) const
{
AssertLockHeld(cs_wallet);
return IsMine(GetScriptForDestination(dest));
}
isminetype CWallet::IsMine(const CScript& script) const
{
AssertLockHeld(cs_wallet);
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;
}
bool CWallet::IsMine(const CTransaction& tx) const
{
AssertLockHeld(cs_wallet);
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::IsHDEnabled() const
{
// All Active ScriptPubKeyMans must be HD for this to be true
bool result = false;
for (const auto& spk_man : GetActiveScriptPubKeyMans()) {
if (!spk_man->IsHDEnabled()) return false;
result = true;
}
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(GetDatabase()).WriteWalletFlags(m_wallet_flags))
throw std::runtime_error(std::string(__func__) + ": writing wallet flags failed");
}
void CWallet::UnsetWalletFlag(uint64_t flag)
{
WalletBatch batch(GetDatabase());
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::LoadWalletFlags(uint64_t flags)
{
LOCK(cs_wallet);
if (((flags & KNOWN_WALLET_FLAGS) >> 32) ^ (flags >> 32)) {
// contains unknown non-tolerable wallet flags
return false;
}
m_wallet_flags = flags;
return true;
}
bool CWallet::AddWalletFlags(uint64_t flags)
{
LOCK(cs_wallet);
// We should never be writing unknown non-tolerable wallet flags
assert(((flags & KNOWN_WALLET_FLAGS) >> 32) == (flags >> 32));
if (!WalletBatch(GetDatabase()).WriteWalletFlags(flags)) {
throw std::runtime_error(std::string(__func__) + ": writing wallet flags failed");
}
return LoadWalletFlags(flags);
}
// 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) depending on coin_control
bool DummySignInput(const SigningProvider& provider, CTxIn &tx_in, const CTxOut &txout, const CCoinControl* coin_control)
{
// Fill in dummy signatures for fee calculation.
const CScript& scriptPubKey = txout.scriptPubKey;
SignatureData sigdata;
// Use max sig if watch only inputs were used or if this particular input is an external input
// to ensure a sufficient fee is attained for the requested feerate.
const bool use_max_sig = coin_control && (coin_control->fAllowWatchOnly || coin_control->IsExternalSelected(tx_in.prevout));
if (!ProduceSignature(provider, use_max_sig ? DUMMY_MAXIMUM_SIGNATURE_CREATOR : DUMMY_SIGNATURE_CREATOR, scriptPubKey, sigdata)) {
return false;
}
UpdateInput(tx_in, sigdata);
return true;
}
bool FillInputToWeight(CTxIn& txin, int64_t target_weight)
{
assert(txin.scriptSig.empty());
assert(txin.scriptWitness.IsNull());
int64_t txin_weight = GetTransactionInputWeight(txin);
// Do nothing if the weight that should be added is less than the weight that already exists
if (target_weight < txin_weight) {
return false;
}
if (target_weight == txin_weight) {
return true;
}
// Subtract current txin weight, which should include empty witness stack
int64_t add_weight = target_weight - txin_weight;
assert(add_weight > 0);
// We will want to subtract the size of the Compact Size UInt that will also be serialized.
// However doing so when the size is near a boundary can result in a problem where it is not
// possible to have a stack element size and combination to exactly equal a target.
// To avoid this possibility, if the weight to add is less than 10 bytes greater than
// a boundary, the size will be split so that 2/3rds will be in one stack element, and
// the remaining 1/3rd in another. Using 3rds allows us to avoid additional boundaries.
// 10 bytes is used because that accounts for the maximum size. This does not need to be super precise.
if ((add_weight >= 253 && add_weight < 263)
|| (add_weight > std::numeric_limits<uint16_t>::max() && add_weight <= std::numeric_limits<uint16_t>::max() + 10)
|| (add_weight > std::numeric_limits<uint32_t>::max() && add_weight <= std::numeric_limits<uint32_t>::max() + 10)) {
int64_t first_weight = add_weight / 3;
add_weight -= first_weight;
first_weight -= GetSizeOfCompactSize(first_weight);
txin.scriptWitness.stack.emplace(txin.scriptWitness.stack.end(), first_weight, 0);
}
add_weight -= GetSizeOfCompactSize(add_weight);
txin.scriptWitness.stack.emplace(txin.scriptWitness.stack.end(), add_weight, 0);
assert(GetTransactionInputWeight(txin) == target_weight);
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, const CCoinControl* coin_control) const
{
// Fill in dummy signatures for fee calculation.
int nIn = 0;
for (const auto& txout : txouts)
{
CTxIn& txin = txNew.vin[nIn];
// If weight was provided, fill the input to that weight
if (coin_control && coin_control->HasInputWeight(txin.prevout)) {
if (!FillInputToWeight(txin, coin_control->GetInputWeight(txin.prevout))) {
return false;
}
nIn++;
continue;
}
const std::unique_ptr<SigningProvider> provider = GetSolvingProvider(txout.scriptPubKey);
if (!provider || !DummySignInput(*provider, txin, txout, coin_control)) {
if (!coin_control || !DummySignInput(coin_control->m_external_provider, txin, txout, coin_control)) {
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(GetDatabase());
for (const CScript& script : script_pub_keys) {
CTxDestination dest;
ExtractDestination(script, dest);
if (IsValidDestination(dest)) {
SetAddressBookWithDB(batch, dest, label, "receive");
}
}
}
return true;
}
/**
* 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.
int start_height = 0;
uint256 start_block;
bool start = chain().findFirstBlockWithTimeAndHeight(startTime - TIMESTAMP_WINDOW, 0, FoundBlock().hash(start_block).height(start_height));
WalletLogPrintf("%s: Rescanning last %i blocks\n", __func__, start ? WITH_LOCK(cs_wallet, return GetLastBlockHeight()) - start_height + 1 : 0);
if (start) {
// TODO: this should take into account failure by ScanResult::USER_ABORT
ScanResult result = ScanForWalletTransactions(start_block, start_height, /*max_height=*/{}, reserver, /*fUpdate=*/update, /*save_progress=*/false);
if (result.status == ScanResult::FAILURE) {
int64_t time_max;
CHECK_NONFATAL(chain().findBlock(result.last_failed_block, FoundBlock().maxTime(time_max)));
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] start_height Height of start_block
* @param[in] max_height Optional max scanning height. If unset there is
* no maximum and scanning can continue to the 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, int start_height, std::optional<int> max_height, const WalletRescanReserver& reserver, bool fUpdate, const bool save_progress)
{
constexpr auto INTERVAL_TIME{60s};
auto current_time{reserver.now()};
auto start_time{reserver.now()};
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 required on startup (e.g. due to corruption)
uint256 tip_hash = WITH_LOCK(cs_wallet, return GetLastBlockHash());
uint256 end_hash = tip_hash;
if (max_height) chain().findAncestorByHeight(tip_hash, *max_height, FoundBlock().hash(end_hash));
double progress_begin = chain().guessVerificationProgress(block_hash);
double progress_end = chain().guessVerificationProgress(end_hash);
double progress_current = progress_begin;
int block_height = start_height;
while (!fAbortRescan && !chain().shutdownRequested()) {
if (progress_end - progress_begin > 0.0) {
m_scanning_progress = (progress_current - progress_begin) / (progress_end - progress_begin);
} else { // avoid divide-by-zero for single block scan range (i.e. start and stop hashes are equal)
m_scanning_progress = 0;
}
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))));
}
bool next_interval = reserver.now() >= current_time + INTERVAL_TIME;
if (next_interval) {
current_time = reserver.now();
WalletLogPrintf("Still rescanning. At block %d. Progress=%f\n", block_height, progress_current);
}
// Read block data
CBlock block;
chain().findBlock(block_hash, FoundBlock().data(block));
// Find next block separately from reading data above, because reading
// is slow and there might be a reorg while it is read.
bool block_still_active = false;
bool next_block = false;
uint256 next_block_hash;
chain().findBlock(block_hash, FoundBlock().inActiveChain(block_still_active).nextBlock(FoundBlock().inActiveChain(next_block).hash(next_block_hash)));
if (!block.IsNull()) {
LOCK(cs_wallet);
if (!block_still_active) {
// Abort scan if current block is no longer active, to prevent
// marking transactions as coming from the wrong block.
result.last_failed_block = block_hash;
result.status = ScanResult::FAILURE;
break;
}
for (size_t posInBlock = 0; posInBlock < block.vtx.size(); ++posInBlock) {
SyncTransaction(block.vtx[posInBlock], TxStateConfirmed{block_hash, block_height, static_cast<int>(posInBlock)}, fUpdate, /*rescanning_old_block=*/true);
}
// scan succeeded, record block as most recent successfully scanned
result.last_scanned_block = block_hash;
result.last_scanned_height = block_height;
if (save_progress && next_interval) {
CBlockLocator loc = m_chain->getActiveChainLocator(block_hash);
if (!loc.IsNull()) {
WalletLogPrintf("Saving scan progress %d.\n", block_height);
WalletBatch batch(GetDatabase());
batch.WriteBestBlock(loc);
}
}
} 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 (max_height && block_height >= *max_height) {
break;
}
{
if (!next_block) {
// 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 = next_block_hash;
++block_height;
progress_current = chain().guessVerificationProgress(block_hash);
// handle updated tip hash
const uint256 prev_tip_hash = tip_hash;
tip_hash = WITH_LOCK(cs_wallet, return GetLastBlockHash());
if (!max_height && 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 {
auto duration_milliseconds = std::chrono::duration_cast<std::chrono::milliseconds>(reserver.now() - start_time);
WalletLogPrintf("Rescan completed in %15dms\n", duration_milliseconds.count());
}
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 = GetTxDepthInMainChain(wtx);
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;
SubmitTxMemoryPoolAndRelay(wtx, unused_err_string, false);
}
}
bool CWallet::SubmitTxMemoryPoolAndRelay(CWalletTx& wtx, std::string& err_string, bool relay) const
{
AssertLockHeld(cs_wallet);
// Can't relay if wallet is not broadcasting
if (!GetBroadcastTransactions()) return false;
// Don't relay abandoned transactions
if (wtx.isAbandoned()) return false;
// Don't try to submit coinbase transactions. These would fail anyway but would
// cause log spam.
if (wtx.IsCoinBase()) return false;
// Don't try to submit conflicted or confirmed transactions.
if (GetTxDepthInMainChain(wtx) != 0) return false;
// Submit transaction to mempool for relay
WalletLogPrintf("Submitting wtx %s to mempool for relay\n", wtx.GetHash().ToString());
// We must set TxStateInMempool here. Even though it will also be set later 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.
//
// If broadcast fails for any reason, trying to set wtx.m_state here would be incorrect.
// If transaction was previously in the mempool, it should be updated when
// TransactionRemovedFromMempool fires.
bool ret = chain().broadcastTransaction(wtx.tx, m_default_max_tx_fee, relay, err_string);
if (ret) wtx.m_state = TxStateInMempool{};
return ret;
}
std::set<uint256> CWallet::GetTxConflicts(const CWalletTx& wtx) const
{
AssertLockHeld(cs_wallet);
const uint256 myHash{wtx.GetHash()};
std::set<uint256> result{GetConflicts(myHash)};
result.erase(myHash);
return result;
}
// 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);
// resend 12-36 hours from now, ~1 day on average.
nNextResend = GetTime() + (12 * 60 * 60) + GetRand(24 * 60 * 60);
if (fFirst) return;
int submitted_tx_count = 0;
{ // cs_wallet scope
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. SubmitTxMemoryPoolAndRelay() will not rebroadcast
// any confirmed or conflicting txs.
if (wtx.nTimeReceived > m_best_block_time - 5 * 60) continue;
std::string unused_err_string;
if (SubmitTxMemoryPoolAndRelay(wtx, unused_err_string, true)) ++submitted_tx_count;
}
} // cs_wallet
if (submitted_tx_count > 0) {
WalletLogPrintf("%s: resubmit %u unconfirmed transactions\n", __func__, submitted_tx_count);
}
}
/** @} */ // end of mapWallet
void MaybeResendWalletTxs(WalletContext& context)
{
for (const std::shared_ptr<CWallet>& pwallet : GetWallets(context)) {
pwallet->ResendWalletTransactions();
}
}
/** @defgroup Actions
*
* @{
*/
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;
int prev_height = wtx.state<TxStateConfirmed>() ? wtx.state<TxStateConfirmed>()->confirmed_block_height : 0;
coins[input.prevout] = Coin(wtx.tx->vout[input.prevout.n], prev_height, wtx.IsCoinBase());
}
std::map<int, bilingual_str> input_errors;
return SignTransaction(tx, coins, SIGHASH_DEFAULT, input_errors);
}
bool CWallet::SignTransaction(CMutableTransaction& tx, const std::map<COutPoint, Coin>& coins, int sighash, std::map<int, bilingual_str>& input_errors) const
{
// Try to sign with all ScriptPubKeyMans
for (ScriptPubKeyMan* spk_man : GetAllScriptPubKeyMans()) {
// 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;
}
}
// At this point, one input was not fully signed otherwise we would have exited already
return false;
}
TransactionError CWallet::FillPSBT(PartiallySignedTransaction& psbtx, bool& complete, int sighash_type, bool sign, bool bip32derivs, size_t * n_signed, bool finalize) const
{
if (n_signed) {
*n_signed = 0;
}
const PrecomputedTransactionData txdata = PrecomputePSBTData(psbtx);
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;
}
// If we have no utxo, grab it from the wallet.
if (!input.non_witness_utxo) {
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
for (ScriptPubKeyMan* spk_man : GetAllScriptPubKeyMans()) {
int n_signed_this_spkm = 0;
TransactionError res = spk_man->FillPSBT(psbtx, txdata, sighash_type, sign, bip32derivs, &n_signed_this_spkm, finalize);
if (res != TransactionError::OK) {
return res;
}
if (n_signed) {
(*n_signed) += n_signed_this_spkm;
}
}
// Only drop non_witness_utxos if sighash_type != SIGHASH_ANYONECANPAY
if ((sighash_type & 0x80) != SIGHASH_ANYONECANPAY) {
// Figure out if any non_witness_utxos should be dropped
std::vector<unsigned int> to_drop;
for (unsigned int i = 0; i < psbtx.inputs.size(); ++i) {
const auto& input = psbtx.inputs.at(i);
int wit_ver;
std::vector<unsigned char> wit_prog;
if (input.witness_utxo.IsNull() || !input.witness_utxo.scriptPubKey.IsWitnessProgram(wit_ver, wit_prog)) {
// There's a non-segwit input or Segwit v0, so we cannot drop any witness_utxos
to_drop.clear();
break;
}
if (wit_ver == 0) {
// Segwit v0, so we cannot drop any non_witness_utxos
to_drop.clear();
break;
}
if (input.non_witness_utxo) {
to_drop.push_back(i);
}
}
// Drop the non_witness_utxos that we can drop
for (unsigned int i : to_drop) {
psbtx.inputs.at(i).non_witness_utxo = nullptr;
}
}
// 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;
}
OutputType CWallet::TransactionChangeType(const std::optional<OutputType>& change_type, const std::vector<CRecipient>& vecSend) const
{
// If -changetype is specified, always use that change type.
if (change_type) {
return *change_type;
}
// if m_default_address_type is legacy, use legacy address as change.
if (m_default_address_type == OutputType::LEGACY) {
return OutputType::LEGACY;
}
bool any_tr{false};
bool any_wpkh{false};
bool any_sh{false};
bool any_pkh{false};
for (const auto& recipient : vecSend) {
std::vector<std::vector<uint8_t>> dummy;
const TxoutType type{Solver(recipient.scriptPubKey, dummy)};
if (type == TxoutType::WITNESS_V1_TAPROOT) {
any_tr = true;
} else if (type == TxoutType::WITNESS_V0_KEYHASH) {
any_wpkh = true;
} else if (type == TxoutType::SCRIPTHASH) {
any_sh = true;
} else if (type == TxoutType::PUBKEYHASH) {
any_pkh = true;
}
}
const bool has_bech32m_spkman(GetScriptPubKeyMan(OutputType::BECH32M, /*internal=*/true));
if (has_bech32m_spkman && any_tr) {
// Currently tr is the only type supported by the BECH32M spkman
return OutputType::BECH32M;
}
const bool has_bech32_spkman(GetScriptPubKeyMan(OutputType::BECH32, /*internal=*/true));
if (has_bech32_spkman && any_wpkh) {
// Currently wpkh is the only type supported by the BECH32 spkman
return OutputType::BECH32;
}
const bool has_p2sh_segwit_spkman(GetScriptPubKeyMan(OutputType::P2SH_SEGWIT, /*internal=*/true));
if (has_p2sh_segwit_spkman && any_sh) {
// Currently sh_wpkh is the only type supported by the P2SH_SEGWIT spkman
// As of 2021 about 80% of all SH are wrapping WPKH, so use that
return OutputType::P2SH_SEGWIT;
}
const bool has_legacy_spkman(GetScriptPubKeyMan(OutputType::LEGACY, /*internal=*/true));
if (has_legacy_spkman && any_pkh) {
// Currently pkh is the only type supported by the LEGACY spkman
return OutputType::LEGACY;
}
if (has_bech32m_spkman) {
return OutputType::BECH32M;
}
if (has_bech32_spkman) {
return OutputType::BECH32;
}
// else use m_default_address_type for change
return m_default_address_type;
}
void CWallet::CommitTransaction(CTransactionRef tx, mapValue_t mapValue, std::vector<std::pair<std::string, std::string>> orderForm)
{
LOCK(cs_wallet);
WalletLogPrintf("CommitTransaction:\n%s", tx->ToString()); /* Continued */
// Add tx to wallet, because if it has change it's also ours,
// otherwise just for transaction history.
CWalletTx* wtx = AddToWallet(tx, TxStateInactive{}, [&](CWalletTx& wtx, bool new_tx) {
CHECK_NONFATAL(wtx.mapValue.empty());
CHECK_NONFATAL(wtx.vOrderForm.empty());
wtx.mapValue = std::move(mapValue);
wtx.vOrderForm = std::move(orderForm);
wtx.fTimeReceivedIsTxTime = true;
wtx.fFromMe = true;
return true;
});
// wtx can only be null if the db write failed.
if (!wtx) {
throw std::runtime_error(std::string(__func__) + ": Wallet db error, transaction commit failed");
}
// Notify that old coins are spent
for (const CTxIn& txin : tx->vin) {
CWalletTx &coin = mapWallet.at(txin.prevout.hash);
coin.MarkDirty();
NotifyTransactionChanged(coin.GetHash(), CT_UPDATED);
}
if (!fBroadcastTransactions) {
// Don't submit tx to the mempool
return;
}
std::string err_string;
if (!SubmitTxMemoryPoolAndRelay(*wtx, 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()
{
LOCK(cs_wallet);
DBErrors nLoadWalletRet = WalletBatch(GetDatabase()).LoadWallet(this);
if (nLoadWalletRet == DBErrors::NEED_REWRITE)
{
if (GetDatabase().Rewrite("\x04pool"))
{
for (const auto& spk_man_pair : m_spk_managers) {
spk_man_pair.second->RewriteDB();
}
}
}
if (m_spk_managers.empty()) {
assert(m_external_spk_managers.empty());
assert(m_internal_spk_managers.empty());
}
return nLoadWalletRet;
}
DBErrors CWallet::ZapSelectTx(std::vector<uint256>& vHashIn, std::vector<uint256>& vHashOut)
{
AssertLockHeld(cs_wallet);
DBErrors nZapSelectTxRet = WalletBatch(GetDatabase()).ZapSelectTx(vHashIn, vHashOut);
for (const uint256& hash : vHashOut) {
const auto& it = mapWallet.find(hash);
wtxOrdered.erase(it->second.m_it_wtxOrdered);
for (const auto& txin : it->second.tx->vin)
mapTxSpends.erase(txin.prevout);
mapWallet.erase(it);
NotifyTransactionChanged(hash, CT_DELETED);
}
if (nZapSelectTxRet == DBErrors::NEED_REWRITE)
{
if (GetDatabase().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;
}
bool CWallet::SetAddressBookWithDB(WalletBatch& batch, const CTxDestination& address, const std::string& strName, const std::string& strPurpose)
{
bool fUpdated = false;
bool is_mine;
{
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;
is_mine = IsMine(address) != ISMINE_NO;
}
NotifyAddressBookChanged(address, strName, is_mine,
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(GetDatabase());
return SetAddressBookWithDB(batch, address, strName, strPurpose);
}
bool CWallet::DelAddressBook(const CTxDestination& address)
{
bool is_mine;
WalletBatch batch(GetDatabase());
{
LOCK(cs_wallet);
// 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?).
if (IsMine(address)) {
WalletLogPrintf("%s called with IsMine address, NOT SUPPORTED. Please report this bug! %s\n", __func__, PACKAGE_BUGREPORT);
return false;
}
// 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)
{
batch.EraseDestData(strAddress, item.first);
}
m_address_book.erase(address);
is_mine = IsMine(address) != ISMINE_NO;
}
NotifyAddressBookChanged(address, "", is_mine, "", CT_DELETED);
batch.ErasePurpose(EncodeDestination(address));
return batch.EraseName(EncodeDestination(address));
}
size_t CWallet::KeypoolCountExternalKeys() const
{
AssertLockHeld(cs_wallet);
auto legacy_spk_man = GetLegacyScriptPubKeyMan();
if (legacy_spk_man) {
return legacy_spk_man->KeypoolCountExternalKeys();
}
unsigned int count = 0;
for (auto spk_man : m_external_spk_managers) {
count += spk_man.second->GetKeyPoolSize();
}
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;
}
BResult<CTxDestination> CWallet::GetNewDestination(const OutputType type, const std::string label)
{
LOCK(cs_wallet);
auto spk_man = GetScriptPubKeyMan(type, false /* internal */);
if (!spk_man) {
return strprintf(_("Error: No %s addresses available."), FormatOutputType(type));
}
spk_man->TopUp();
auto op_dest = spk_man->GetNewDestination(type);
if (op_dest) {
SetAddressBook(op_dest.GetObj(), label, "receive");
}
return op_dest;
}
BResult<CTxDestination> CWallet::GetNewChangeDestination(const OutputType type)
{
LOCK(cs_wallet);
CTxDestination dest;
bilingual_str error;
ReserveDestination reservedest(this, type);
if (!reservedest.GetReservedDestination(dest, true, error)) {
return error;
}
reservedest.KeepDestination();
return dest;
}
std::optional<int64_t> CWallet::GetOldestKeyPoolTime() const
{
LOCK(cs_wallet);
if (m_spk_managers.empty()) {
return std::nullopt;
}
std::optional<int64_t> oldest_key{std::numeric_limits<int64_t>::max()};
for (const auto& spk_man_pair : m_spk_managers) {
oldest_key = std::min(oldest_key, spk_man_pair.second->GetOldestKeyPoolTime());
}
return oldest_key;
}
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;
}
}
}
}
void CWallet::ForEachAddrBookEntry(const ListAddrBookFunc& func) const
{
AssertLockHeld(cs_wallet);
for (const std::pair<const CTxDestination, CAddressBookData>& item : m_address_book) {
const auto& entry = item.second;
func(item.first, entry.GetLabel(), entry.purpose, entry.IsChange());
}
}
std::vector<CTxDestination> CWallet::ListAddrBookAddresses(const std::optional<AddrBookFilter>& _filter) const
{
AssertLockHeld(cs_wallet);
std::vector<CTxDestination> result;
AddrBookFilter filter = _filter ? *_filter : AddrBookFilter();
ForEachAddrBookEntry([&result, &filter](const CTxDestination& dest, const std::string& label, const std::string& purpose, bool is_change) {
// Filter by change
if (filter.ignore_change && is_change) return;
// Filter by label
if (filter.m_op_label && *filter.m_op_label != label) return;
// All good
result.emplace_back(dest);
});
return result;
}
std::set<std::string> CWallet::ListAddrBookLabels(const std::string& purpose) const
{
AssertLockHeld(cs_wallet);
std::set<std::string> label_set;
ForEachAddrBookEntry([&](const CTxDestination& _dest, const std::string& _label,
const std::string& _purpose, bool _is_change) {
if (_is_change) return;
if (purpose.empty() || _purpose == purpose) {
label_set.insert(_label);
}
});
return label_set;
}
bool ReserveDestination::GetReservedDestination(CTxDestination& dest, bool internal, bilingual_str& error)
{
m_spk_man = pwallet->GetScriptPubKeyMan(type, internal);
if (!m_spk_man) {
error = strprintf(_("Error: No %s addresses available."), FormatOutputType(type));
return false;
}
if (nIndex == -1)
{
m_spk_man->TopUp();
CKeyPool keypool;
if (!m_spk_man->GetReservedDestination(type, internal, address, nIndex, keypool, error)) {
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();
}
bool CWallet::DisplayAddress(const CTxDestination& dest)
{
CScript scriptPubKey = GetScriptForDestination(dest);
for (const auto& spk_man : GetScriptPubKeyMans(scriptPubKey)) {
auto signer_spk_man = dynamic_cast<ExternalSignerScriptPubKeyMan *>(spk_man);
if (signer_spk_man == nullptr) {
continue;
}
ExternalSigner signer = ExternalSignerScriptPubKeyMan::GetExternalSigner();
return signer_spk_man->DisplayAddress(scriptPubKey, signer);
}
return false;
}
bool CWallet::LockCoin(const COutPoint& output, WalletBatch* batch)
{
AssertLockHeld(cs_wallet);
setLockedCoins.insert(output);
if (batch) {
return batch->WriteLockedUTXO(output);
}
return true;
}
bool CWallet::UnlockCoin(const COutPoint& output, WalletBatch* batch)
{
AssertLockHeld(cs_wallet);
bool was_locked = setLockedCoins.erase(output);
if (batch && was_locked) {
return batch->EraseLockedUTXO(output);
}
return true;
}
bool CWallet::UnlockAllCoins()
{
AssertLockHeld(cs_wallet);
bool success = true;
WalletBatch batch(GetDatabase());
for (auto it = setLockedCoins.begin(); it != setLockedCoins.end(); ++it) {
success &= batch.EraseLockedUTXO(*it);
}
setLockedCoins.clear();
return success;
}
bool CWallet::IsLockedCoin(const COutPoint& output) const
{
AssertLockHeld(cs_wallet);
return setLockedCoins.count(output) > 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(std::map<CKeyID, int64_t>& mapKeyBirth) const {
AssertLockHeld(cs_wallet);
mapKeyBirth.clear();
// map in which we'll infer heights of other keys
std::map<CKeyID, const TxStateConfirmed*> mapKeyFirstBlock;
TxStateConfirmed max_confirm{uint256{}, /*height=*/-1, /*index=*/-1};
max_confirm.confirmed_block_height = GetLastBlockHeight() > 144 ? GetLastBlockHeight() - 144 : 0; // the tip can be reorganized; use a 144-block safety margin
CHECK_NONFATAL(chain().findAncestorByHeight(GetLastBlockHash(), max_confirm.confirmed_block_height, FoundBlock().hash(max_confirm.confirmed_block_hash)));
{
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;
}
}
// Prepare to infer birth heights for keys without metadata
for (const CKeyID &keyid : spk_man->GetKeys()) {
if (mapKeyBirth.count(keyid) == 0)
mapKeyFirstBlock[keyid] = &max_confirm;
}
// 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 (auto* conf = wtx.state<TxStateConfirmed>()) {
// ... 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
auto rit = mapKeyFirstBlock.find(keyid);
if (rit != mapKeyFirstBlock.end() && conf->confirmed_block_height < rit->second->confirmed_block_height) {
rit->second = conf;
}
}
}
}
}
}
// Extract block timestamps for those keys
for (const auto& entry : mapKeyFirstBlock) {
int64_t block_time;
CHECK_NONFATAL(chain().findBlock(entry.second->confirmed_block_hash, FoundBlock().time(block_time)));
mapKeyBirth[entry.first] = block_time - 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 transaction during a rescanning process, assign all its
* (not already known) transactions' timestamps to the block 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, bool rescanning_old_block) const
{
std::optional<uint256> block_hash;
if (auto* conf = wtx.state<TxStateConfirmed>()) {
block_hash = conf->confirmed_block_hash;
} else if (auto* conf = wtx.state<TxStateConflicted>()) {
block_hash = conf->conflicting_block_hash;
}
unsigned int nTimeSmart = wtx.nTimeReceived;
if (block_hash) {
int64_t blocktime;
int64_t block_max_time;
if (chain().findBlock(*block_hash, FoundBlock().time(blocktime).maxTime(block_max_time))) {
if (rescanning_old_block) {
nTimeSmart = block_max_time;
} else {
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(), block_hash->ToString());
}
}
return nTimeSmart;
}
bool CWallet::SetAddressUsed(WalletBatch& batch, const CTxDestination& dest, bool used)
{
const std::string key{"used"};
if (std::get_if<CNoDestination>(&dest))
return false;
if (!used) {
if (auto* data = util::FindKey(m_address_book, dest)) data->destdata.erase(key);
return batch.EraseDestData(EncodeDestination(dest), key);
}
const std::string value{"1"};
m_address_book[dest].destdata.insert(std::make_pair(key, value));
return batch.WriteDestData(EncodeDestination(dest), key, value);
}
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::IsAddressUsed(const CTxDestination& dest) const
{
const std::string key{"used"};
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())
{
return true;
}
}
return false;
}
std::vector<std::string> CWallet::GetAddressReceiveRequests() const
{
const std::string prefix{"rr"};
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::SetAddressReceiveRequest(WalletBatch& batch, const CTxDestination& dest, const std::string& id, const std::string& value)
{
const std::string key{"rr" + id}; // "rr" prefix = "receive request" in destdata
CAddressBookData& data = m_address_book.at(dest);
if (value.empty()) {
if (!batch.EraseDestData(EncodeDestination(dest), key)) return false;
data.destdata.erase(key);
} else {
if (!batch.WriteDestData(EncodeDestination(dest), key, value)) return false;
data.destdata[key] = value;
}
return true;
}
std::unique_ptr<WalletDatabase> MakeWalletDatabase(const std::string& name, const DatabaseOptions& options, DatabaseStatus& status, bilingual_str& error_string)
{
// 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.
const fs::path wallet_path = fsbridge::AbsPathJoin(GetWalletDir(), fs::PathFromString(name));
fs::file_type path_type = fs::symlink_status(wallet_path).type();
if (!(path_type == fs::file_type::not_found || path_type == fs::file_type::directory ||
(path_type == fs::file_type::symlink && fs::is_directory(wallet_path)) ||
(path_type == fs::file_type::regular && fs::PathFromString(name).filename() == fs::PathFromString(name)))) {
error_string = Untranslated(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)",
name, fs::quoted(fs::PathToString(GetWalletDir()))));
status = DatabaseStatus::FAILED_BAD_PATH;
return nullptr;
}
return MakeDatabase(wallet_path, options, status, error_string);
}
std::shared_ptr<CWallet> CWallet::Create(WalletContext& context, const std::string& name, std::unique_ptr<WalletDatabase> database, uint64_t wallet_creation_flags, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
interfaces::Chain* chain = context.chain;
ArgsManager& args = *Assert(context.args);
const std::string& walletFile = database->Filename();
int64_t nStart = GetTimeMillis();
// TODO: Can't use std::make_shared because we need a custom deleter but
// should be possible to use std::allocate_shared.
const std::shared_ptr<CWallet> walletInstance(new CWallet(chain, name, args, std::move(database)), ReleaseWallet);
bool rescan_required = false;
DBErrors nLoadWalletRet = walletInstance->LoadWallet();
if (nLoadWalletRet != DBErrors::LOAD_OK) {
if (nLoadWalletRet == DBErrors::CORRUPT) {
error = strprintf(_("Error loading %s: Wallet corrupted"), 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."),
walletFile));
}
else if (nLoadWalletRet == DBErrors::TOO_NEW) {
error = strprintf(_("Error loading %s: Wallet requires newer version of %s"), walletFile, PACKAGE_NAME);
return nullptr;
}
else if (nLoadWalletRet == DBErrors::EXTERNAL_SIGNER_SUPPORT_REQUIRED) {
error = strprintf(_("Error loading %s: External signer wallet being loaded without external signer support compiled"), walletFile);
return nullptr;
}
else if (nLoadWalletRet == DBErrors::NEED_REWRITE)
{
error = strprintf(_("Wallet needed to be rewritten: restart %s to complete"), PACKAGE_NAME);
return nullptr;
} else if (nLoadWalletRet == DBErrors::NEED_RESCAN) {
warnings.push_back(strprintf(_("Error reading %s! Transaction data may be missing or incorrect."
" Rescanning wallet."), walletFile));
rescan_required = true;
}
else {
error = strprintf(_("Error loading %s"), walletFile);
return nullptr;
}
}
// This wallet is in its first run if there are no ScriptPubKeyMans and it isn't blank or no privkeys
const bool fFirstRun = walletInstance->m_spk_managers.empty() &&
!walletInstance->IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS) &&
!walletInstance->IsWalletFlagSet(WALLET_FLAG_BLANK_WALLET);
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->AddWalletFlags(wallet_creation_flags);
// Only create LegacyScriptPubKeyMan when not descriptor wallet
if (!walletInstance->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
walletInstance->SetupLegacyScriptPubKeyMan();
}
if ((wallet_creation_flags & WALLET_FLAG_EXTERNAL_SIGNER) || !(wallet_creation_flags & (WALLET_FLAG_DISABLE_PRIVATE_KEYS | WALLET_FLAG_BLANK_WALLET))) {
LOCK(walletInstance->cs_wallet);
if (walletInstance->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
walletInstance->SetupDescriptorScriptPubKeyMans();
// SetupDescriptorScriptPubKeyMans already calls SetupGeneration for us so we don't need to call SetupGeneration separately
} else {
// Legacy wallets need SetupGeneration here.
for (auto spk_man : walletInstance->GetActiveScriptPubKeyMans()) {
if (!spk_man->SetupGeneration()) {
error = _("Unable to generate initial keys");
return nullptr;
}
}
}
}
if (chain) {
walletInstance->chainStateFlushed(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"), walletFile);
return nullptr;
} 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"), walletFile));
break;
}
}
}
if (!args.GetArg("-addresstype", "").empty()) {
std::optional<OutputType> parsed = ParseOutputType(args.GetArg("-addresstype", ""));
if (!parsed) {
error = strprintf(_("Unknown address type '%s'"), args.GetArg("-addresstype", ""));
return nullptr;
}
walletInstance->m_default_address_type = parsed.value();
}
if (!args.GetArg("-changetype", "").empty()) {
std::optional<OutputType> parsed = ParseOutputType(args.GetArg("-changetype", ""));
if (!parsed) {
error = strprintf(_("Unknown change type '%s'"), args.GetArg("-changetype", ""));
return nullptr;
}
walletInstance->m_default_change_type = parsed.value();
}
if (args.IsArgSet("-mintxfee")) {
std::optional<CAmount> min_tx_fee = ParseMoney(args.GetArg("-mintxfee", ""));
if (!min_tx_fee || min_tx_fee.value() == 0) {
error = AmountErrMsg("mintxfee", args.GetArg("-mintxfee", ""));
return nullptr;
} else if (min_tx_fee.value() > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-mintxfee") + Untranslated(" ") +
_("This is the minimum transaction fee you pay on every transaction."));
}
walletInstance->m_min_fee = CFeeRate{min_tx_fee.value()};
}
if (args.IsArgSet("-maxapsfee")) {
const std::string max_aps_fee{args.GetArg("-maxapsfee", "")};
if (max_aps_fee == "-1") {
walletInstance->m_max_aps_fee = -1;
} else if (std::optional<CAmount> max_fee = ParseMoney(max_aps_fee)) {
if (max_fee.value() > HIGH_APS_FEE) {
warnings.push_back(AmountHighWarn("-maxapsfee") + Untranslated(" ") +
_("This is the maximum transaction fee you pay (in addition to the normal fee) to prioritize partial spend avoidance over regular coin selection."));
}
walletInstance->m_max_aps_fee = max_fee.value();
} else {
error = AmountErrMsg("maxapsfee", max_aps_fee);
return nullptr;
}
}
if (args.IsArgSet("-fallbackfee")) {
std::optional<CAmount> fallback_fee = ParseMoney(args.GetArg("-fallbackfee", ""));
if (!fallback_fee) {
error = strprintf(_("Invalid amount for -fallbackfee=<amount>: '%s'"), args.GetArg("-fallbackfee", ""));
return nullptr;
} else if (fallback_fee.value() > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-fallbackfee") + Untranslated(" ") +
_("This is the transaction fee you may pay when fee estimates are not available."));
}
walletInstance->m_fallback_fee = CFeeRate{fallback_fee.value()};
}
// 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 (args.IsArgSet("-discardfee")) {
std::optional<CAmount> discard_fee = ParseMoney(args.GetArg("-discardfee", ""));
if (!discard_fee) {
error = strprintf(_("Invalid amount for -discardfee=<amount>: '%s'"), args.GetArg("-discardfee", ""));
return nullptr;
} else if (discard_fee.value() > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-discardfee") + Untranslated(" ") +
_("This is the transaction fee you may discard if change is smaller than dust at this level"));
}
walletInstance->m_discard_rate = CFeeRate{discard_fee.value()};
}
if (args.IsArgSet("-paytxfee")) {
std::optional<CAmount> pay_tx_fee = ParseMoney(args.GetArg("-paytxfee", ""));
if (!pay_tx_fee) {
error = AmountErrMsg("paytxfee", args.GetArg("-paytxfee", ""));
return nullptr;
} else if (pay_tx_fee.value() > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-paytxfee") + Untranslated(" ") +
_("This is the transaction fee you will pay if you send a transaction."));
}
walletInstance->m_pay_tx_fee = CFeeRate{pay_tx_fee.value(), 1000};
if (chain && walletInstance->m_pay_tx_fee < chain->relayMinFee()) {
error = strprintf(_("Invalid amount for -paytxfee=<amount>: '%s' (must be at least %s)"),
args.GetArg("-paytxfee", ""), chain->relayMinFee().ToString());
return nullptr;
}
}
if (args.IsArgSet("-maxtxfee")) {
std::optional<CAmount> max_fee = ParseMoney(args.GetArg("-maxtxfee", ""));
if (!max_fee) {
error = AmountErrMsg("maxtxfee", args.GetArg("-maxtxfee", ""));
return nullptr;
} else if (max_fee.value() > HIGH_MAX_TX_FEE) {
warnings.push_back(_("-maxtxfee is set very high! Fees this large could be paid on a single transaction."));
}
if (chain && CFeeRate{max_fee.value(), 1000} < chain->relayMinFee()) {
error = strprintf(_("Invalid amount for -maxtxfee=<amount>: '%s' (must be at least the minrelay fee of %s to prevent stuck transactions)"),
args.GetArg("-maxtxfee", ""), chain->relayMinFee().ToString());
return nullptr;
}
walletInstance->m_default_max_tx_fee = max_fee.value();
}
if (args.IsArgSet("-consolidatefeerate")) {
if (std::optional<CAmount> consolidate_feerate = ParseMoney(args.GetArg("-consolidatefeerate", ""))) {
walletInstance->m_consolidate_feerate = CFeeRate(*consolidate_feerate);
} else {
error = AmountErrMsg("consolidatefeerate", args.GetArg("-consolidatefeerate", ""));
return nullptr;
}
}
if (chain && chain->relayMinFee().GetFeePerK() > HIGH_TX_FEE_PER_KB) {
warnings.push_back(AmountHighWarn("-minrelaytxfee") + Untranslated(" ") +
_("The wallet will avoid paying less than the minimum relay fee."));
}
walletInstance->m_confirm_target = args.GetIntArg("-txconfirmtarget", DEFAULT_TX_CONFIRM_TARGET);
walletInstance->m_spend_zero_conf_change = args.GetBoolArg("-spendzeroconfchange", DEFAULT_SPEND_ZEROCONF_CHANGE);
walletInstance->m_signal_rbf = args.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();
if (chain && !AttachChain(walletInstance, *chain, rescan_required, error, warnings)) {
return nullptr;
}
{
LOCK(walletInstance->cs_wallet);
walletInstance->SetBroadcastTransactions(args.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;
}
bool CWallet::AttachChain(const std::shared_ptr<CWallet>& walletInstance, interfaces::Chain& chain, const bool rescan_required, bilingual_str& error, std::vector<bilingual_str>& warnings)
{
LOCK(walletInstance->cs_wallet);
// allow setting the chain if it hasn't been set already but prevent changing it
assert(!walletInstance->m_chain || walletInstance->m_chain == &chain);
walletInstance->m_chain = &chain;
// Unless allowed, ensure wallet files are not reused across chains:
if (!gArgs.GetBoolArg("-walletcrosschain", DEFAULT_WALLETCROSSCHAIN)) {
WalletBatch batch(walletInstance->GetDatabase());
CBlockLocator locator;
if (batch.ReadBestBlock(locator) && locator.vHave.size() > 0 && chain.getHeight()) {
// Wallet is assumed to be from another chain, if genesis block in the active
// chain differs from the genesis block known to the wallet.
if (chain.getBlockHash(0) != locator.vHave.back()) {
error = Untranslated("Wallet files should not be reused across chains. Restart bitcoind with -walletcrosschain to override.");
return false;
}
}
}
// Register wallet with validationinterface. It's done before rescan to avoid
// missing block connections between end of rescan and validation subscribing.
// Because of wallet lock being hold, block connection notifications are going to
// be pending on the validation-side until lock release. It's likely to have
// block processing duplicata (if rescan block range overlaps with notification one)
// but we guarantee at least than wallet state is correct after notifications delivery.
// However, chainStateFlushed notifications are ignored until the rescan is finished
// so that in case of a shutdown event, the rescan will be repeated at the next start.
// This is temporary until rescan and notifications delivery are unified under same
// interface.
walletInstance->m_attaching_chain = true; //ignores chainStateFlushed notifications
walletInstance->m_chain_notifications_handler = walletInstance->chain().handleNotifications(walletInstance);
// If rescan_required = true, rescan_height remains equal to 0
int rescan_height = 0;
if (!rescan_required)
{
WalletBatch batch(walletInstance->GetDatabase());
CBlockLocator locator;
if (batch.ReadBestBlock(locator)) {
if (const std::optional<int> fork_height = chain.findLocatorFork(locator)) {
rescan_height = *fork_height;
}
}
}
const std::optional<int> tip_height = chain.getHeight();
if (tip_height) {
walletInstance->m_last_block_processed = 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)
{
if (chain.havePruned()) {
int block_height = *tip_height;
while (block_height > 0 && chain.haveBlockOnDisk(block_height - 1) && rescan_height != block_height) {
--block_height;
}
if (rescan_height != block_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
// 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.
error = _("Prune: last wallet synchronisation goes beyond pruned data. You need to -reindex (download the whole blockchain again in case of pruned node)");
return false;
}
}
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)
std::optional<int64_t> time_first_key;
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) {
chain.findFirstBlockWithTimeAndHeight(*time_first_key - TIMESTAMP_WINDOW, rescan_height, FoundBlock().height(rescan_height));
}
{
WalletRescanReserver reserver(*walletInstance);
if (!reserver.reserve() || (ScanResult::SUCCESS != walletInstance->ScanForWalletTransactions(chain.getBlockHash(rescan_height), rescan_height, /*max_height=*/{}, reserver, /*fUpdate=*/true, /*save_progress=*/true).status)) {
error = _("Failed to rescan the wallet during initialization");
return false;
}
}
walletInstance->m_attaching_chain = false;
walletInstance->chainStateFlushed(chain.getTipLocator());
walletInstance->GetDatabase().IncrementUpdateCounter();
}
walletInstance->m_attaching_chain = false;
return true;
}
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;
}
bool CWallet::UpgradeWallet(int version, bilingual_str& error)
{
int prev_version = GetVersion();
if (version == 0) {
WalletLogPrintf("Performing wallet upgrade to %i\n", FEATURE_LATEST);
version = FEATURE_LATEST;
} else {
WalletLogPrintf("Allowing wallet upgrade up to %i\n", version);
}
if (version < prev_version) {
error = strprintf(_("Cannot downgrade wallet from version %i to version %i. Wallet version unchanged."), prev_version, version);
return false;
}
LOCK(cs_wallet);
// Do not upgrade versions to any version between HD_SPLIT and FEATURE_PRE_SPLIT_KEYPOOL unless already supporting HD_SPLIT
if (!CanSupportFeature(FEATURE_HD_SPLIT) && version >= FEATURE_HD_SPLIT && version < FEATURE_PRE_SPLIT_KEYPOOL) {
error = strprintf(_("Cannot upgrade a non HD split wallet from version %i to version %i without upgrading to support pre-split keypool. Please use version %i or no version specified."), prev_version, version, FEATURE_PRE_SPLIT_KEYPOOL);
return false;
}
// Permanently upgrade to the version
SetMinVersion(GetClosestWalletFeature(version));
for (auto spk_man : GetActiveScriptPubKeyMans()) {
if (!spk_man->Upgrade(prev_version, version, error)) {
return false;
}
}
return true;
}
void CWallet::postInitProcess()
{
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 GetDatabase().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 CWallet::GetTxDepthInMainChain(const CWalletTx& wtx) const
{
AssertLockHeld(cs_wallet);
if (auto* conf = wtx.state<TxStateConfirmed>()) {
return GetLastBlockHeight() - conf->confirmed_block_height + 1;
} else if (auto* conf = wtx.state<TxStateConflicted>()) {
return -1 * (GetLastBlockHeight() - conf->conflicting_block_height + 1);
} else {
return 0;
}
}
int CWallet::GetTxBlocksToMaturity(const CWalletTx& wtx) const
{
AssertLockHeld(cs_wallet);
if (!wtx.IsCoinBase()) {
return 0;
}
int chain_depth = GetTxDepthInMainChain(wtx);
assert(chain_depth >= 0); // coinbase tx should not be conflicted
return std::max(0, (COINBASE_MATURITY+1) - chain_depth);
}
bool CWallet::IsTxImmatureCoinBase(const CWalletTx& wtx) const
{
AssertLockHeld(cs_wallet);
// note GetBlocksToMaturity is 0 for non-coinbase tx
return GetTxBlocksToMaturity(wtx) > 0;
}
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()) {
return nullptr;
}
return it->second;
}
std::set<ScriptPubKeyMan*> CWallet::GetScriptPubKeyMans(const CScript& script) const
{
std::set<ScriptPubKeyMan*> spk_mans;
SignatureData sigdata;
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 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
{
if (IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
return nullptr;
}
// 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() || IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
return;
}
auto spk_manager = std::unique_ptr<ScriptPubKeyMan>(new LegacyScriptPubKeyMan(*this));
for (const auto& type : LEGACY_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);
}
}
void CWallet::LoadDescriptorScriptPubKeyMan(uint256 id, WalletDescriptor& desc)
{
if (IsWalletFlagSet(WALLET_FLAG_EXTERNAL_SIGNER)) {
auto spk_manager = std::unique_ptr<ScriptPubKeyMan>(new ExternalSignerScriptPubKeyMan(*this, desc));
m_spk_managers[id] = std::move(spk_manager);
} else {
auto spk_manager = std::unique_ptr<ScriptPubKeyMan>(new DescriptorScriptPubKeyMan(*this, desc));
m_spk_managers[id] = std::move(spk_manager);
}
}
void CWallet::SetupDescriptorScriptPubKeyMans()
{
AssertLockHeld(cs_wallet);
if (!IsWalletFlagSet(WALLET_FLAG_EXTERNAL_SIGNER)) {
// Make a seed
CKey seed_key;
seed_key.MakeNewKey(true);
CPubKey seed = seed_key.GetPubKey();
assert(seed_key.VerifyPubKey(seed));
// Get the extended key
CExtKey master_key;
master_key.SetSeed(seed_key);
for (bool internal : {false, true}) {
for (OutputType t : OUTPUT_TYPES) {
auto spk_manager = std::unique_ptr<DescriptorScriptPubKeyMan>(new DescriptorScriptPubKeyMan(*this));
if (IsCrypted()) {
if (IsLocked()) {
throw std::runtime_error(std::string(__func__) + ": Wallet is locked, cannot setup new descriptors");
}
if (!spk_manager->CheckDecryptionKey(vMasterKey) && !spk_manager->Encrypt(vMasterKey, nullptr)) {
throw std::runtime_error(std::string(__func__) + ": Could not encrypt new descriptors");
}
}
spk_manager->SetupDescriptorGeneration(master_key, t, internal);
uint256 id = spk_manager->GetID();
m_spk_managers[id] = std::move(spk_manager);
AddActiveScriptPubKeyMan(id, t, internal);
}
}
} else {
ExternalSigner signer = ExternalSignerScriptPubKeyMan::GetExternalSigner();
// TODO: add account parameter
int account = 0;
UniValue signer_res = signer.GetDescriptors(account);
if (!signer_res.isObject()) throw std::runtime_error(std::string(__func__) + ": Unexpected result");
for (bool internal : {false, true}) {
const UniValue& descriptor_vals = find_value(signer_res, internal ? "internal" : "receive");
if (!descriptor_vals.isArray()) throw std::runtime_error(std::string(__func__) + ": Unexpected result");
for (const UniValue& desc_val : descriptor_vals.get_array().getValues()) {
std::string desc_str = desc_val.getValStr();
FlatSigningProvider keys;
std::string desc_error;
std::unique_ptr<Descriptor> desc = Parse(desc_str, keys, desc_error, false);
if (desc == nullptr) {
throw std::runtime_error(std::string(__func__) + ": Invalid descriptor \"" + desc_str + "\" (" + desc_error + ")");
}
if (!desc->GetOutputType()) {
continue;
}
OutputType t = *desc->GetOutputType();
auto spk_manager = std::unique_ptr<ExternalSignerScriptPubKeyMan>(new ExternalSignerScriptPubKeyMan(*this));
spk_manager->SetupDescriptor(std::move(desc));
uint256 id = spk_manager->GetID();
m_spk_managers[id] = std::move(spk_manager);
AddActiveScriptPubKeyMan(id, t, internal);
}
}
}
}
void CWallet::AddActiveScriptPubKeyMan(uint256 id, OutputType type, bool internal)
{
WalletBatch batch(GetDatabase());
if (!batch.WriteActiveScriptPubKeyMan(static_cast<uint8_t>(type), id, internal)) {
throw std::runtime_error(std::string(__func__) + ": writing active ScriptPubKeyMan id failed");
}
LoadActiveScriptPubKeyMan(id, type, internal);
}
void CWallet::LoadActiveScriptPubKeyMan(uint256 id, OutputType type, bool internal)
{
// Activating ScriptPubKeyManager for a given output and change type is incompatible with legacy wallets.
// Legacy wallets have only one ScriptPubKeyManager and it's active for all output and change types.
Assert(IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
WalletLogPrintf("Setting spkMan to active: id = %s, type = %d, internal = %d\n", id.ToString(), static_cast<int>(type), static_cast<int>(internal));
auto& spk_mans = internal ? m_internal_spk_managers : m_external_spk_managers;
auto& spk_mans_other = internal ? m_external_spk_managers : m_internal_spk_managers;
auto spk_man = m_spk_managers.at(id).get();
spk_mans[type] = spk_man;
const auto it = spk_mans_other.find(type);
if (it != spk_mans_other.end() && it->second == spk_man) {
spk_mans_other.erase(type);
}
NotifyCanGetAddressesChanged();
}
void CWallet::DeactivateScriptPubKeyMan(uint256 id, OutputType type, bool internal)
{
auto spk_man = GetScriptPubKeyMan(type, internal);
if (spk_man != nullptr && spk_man->GetID() == id) {
WalletLogPrintf("Deactivate spkMan: id = %s, type = %d, internal = %d\n", id.ToString(), static_cast<int>(type), static_cast<int>(internal));
WalletBatch batch(GetDatabase());
if (!batch.EraseActiveScriptPubKeyMan(static_cast<uint8_t>(type), internal)) {
throw std::runtime_error(std::string(__func__) + ": erasing active ScriptPubKeyMan id failed");
}
auto& spk_mans = internal ? m_internal_spk_managers : m_external_spk_managers;
spk_mans.erase(type);
}
NotifyCanGetAddressesChanged();
}
bool CWallet::IsLegacy() const
{
if (m_internal_spk_managers.count(OutputType::LEGACY) == 0) {
return false;
}
auto spk_man = dynamic_cast<LegacyScriptPubKeyMan*>(m_internal_spk_managers.at(OutputType::LEGACY));
return spk_man != nullptr;
}
DescriptorScriptPubKeyMan* CWallet::GetDescriptorScriptPubKeyMan(const WalletDescriptor& desc) const
{
for (auto& spk_man_pair : m_spk_managers) {
// Try to downcast to DescriptorScriptPubKeyMan then check if the descriptors match
DescriptorScriptPubKeyMan* spk_manager = dynamic_cast<DescriptorScriptPubKeyMan*>(spk_man_pair.second.get());
if (spk_manager != nullptr && spk_manager->HasWalletDescriptor(desc)) {
return spk_manager;
}
}
return nullptr;
}
std::optional<bool> CWallet::IsInternalScriptPubKeyMan(ScriptPubKeyMan* spk_man) const
{
// Legacy script pubkey man can't be either external or internal
if (IsLegacy()) {
return std::nullopt;
}
// only active ScriptPubKeyMan can be internal
if (!GetActiveScriptPubKeyMans().count(spk_man)) {
return std::nullopt;
}
const auto desc_spk_man = dynamic_cast<DescriptorScriptPubKeyMan*>(spk_man);
if (!desc_spk_man) {
throw std::runtime_error(std::string(__func__) + ": unexpected ScriptPubKeyMan type.");
}
LOCK(desc_spk_man->cs_desc_man);
const auto& type = desc_spk_man->GetWalletDescriptor().descriptor->GetOutputType();
assert(type.has_value());
return GetScriptPubKeyMan(*type, /* internal= */ true) == desc_spk_man;
}
ScriptPubKeyMan* CWallet::AddWalletDescriptor(WalletDescriptor& desc, const FlatSigningProvider& signing_provider, const std::string& label, bool internal)
{
AssertLockHeld(cs_wallet);
if (!IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS)) {
WalletLogPrintf("Cannot add WalletDescriptor to a non-descriptor wallet\n");
return nullptr;
}
auto spk_man = GetDescriptorScriptPubKeyMan(desc);
if (spk_man) {
WalletLogPrintf("Update existing descriptor: %s\n", desc.descriptor->ToString());
spk_man->UpdateWalletDescriptor(desc);
} else {
auto new_spk_man = std::unique_ptr<DescriptorScriptPubKeyMan>(new DescriptorScriptPubKeyMan(*this, desc));
spk_man = new_spk_man.get();
// Save the descriptor to memory
m_spk_managers[new_spk_man->GetID()] = std::move(new_spk_man);
}
// Add the private keys to the descriptor
for (const auto& entry : signing_provider.keys) {
const CKey& key = entry.second;
spk_man->AddDescriptorKey(key, key.GetPubKey());
}
// Top up key pool, the manager will generate new scriptPubKeys internally
if (!spk_man->TopUp()) {
WalletLogPrintf("Could not top up scriptPubKeys\n");
return nullptr;
}
// Apply the label if necessary
// Note: we disable labels for ranged descriptors
if (!desc.descriptor->IsRange()) {
auto script_pub_keys = spk_man->GetScriptPubKeys();
if (script_pub_keys.empty()) {
WalletLogPrintf("Could not generate scriptPubKeys (cache is empty)\n");
return nullptr;
}
CTxDestination dest;
if (!internal && ExtractDestination(script_pub_keys.at(0), dest)) {
SetAddressBook(dest, label, "receive");
}
}
// Save the descriptor to DB
spk_man->WriteDescriptor();
return spk_man;
}
} // namespace wallet
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