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wallet.cpp
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wallet.cpp
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or https://www.opensource.org/licenses/mit-license.php .
#include "wallet/wallet.h"
#include "asyncrpcqueue.h"
#include "checkpoints.h"
#include "coincontrol.h"
#include "core_io.h"
#include "consensus/upgrades.h"
#include "consensus/validation.h"
#include "consensus/consensus.h"
#include "fs.h"
#include "init.h"
#include "key_io.h"
#include "main.h"
#include "net.h"
#include "policy/policy.h"
#include "random.h"
#include "rpc/protocol.h"
#include "rpc/server.h"
#include "script/script.h"
#include "script/sign.h"
#include "timedata.h"
#include "utilmoneystr.h"
#include "zcash/JoinSplit.hpp"
#include "zcash/Note.hpp"
#include "crypter.h"
#include "wallet/asyncrpcoperation_saplingmigration.h"
#include <algorithm>
#include <assert.h>
#include <variant>
#include <boost/algorithm/string/replace.hpp>
#include <boost/thread.hpp>
using namespace std;
using namespace libzcash;
CWallet* pwalletMain = NULL;
/** Transaction fee set by the user */
CFeeRate payTxFee(DEFAULT_TRANSACTION_FEE);
unsigned int nTxConfirmTarget = DEFAULT_TX_CONFIRM_TARGET;
bool bSpendZeroConfChange = DEFAULT_SPEND_ZEROCONF_CHANGE;
bool fSendFreeTransactions = DEFAULT_SEND_FREE_TRANSACTIONS;
bool fPayAtLeastCustomFee = true;
const char * DEFAULT_WALLET_DAT = "wallet.dat";
/**
* Fees smaller than this (in satoshi) are considered zero fee (for transaction creation)
* Override with -mintxfee
*/
CFeeRate CWallet::minTxFee = CFeeRate(DEFAULT_TRANSACTION_MINFEE);
/** @defgroup mapWallet
*
* @{
*/
struct CompareValueOnly
{
bool operator()(const pair<CAmount, pair<const CWalletTx*, unsigned int> >& t1,
const pair<CAmount, pair<const CWalletTx*, unsigned int> >& t2) const
{
return t1.first < t2.first;
}
};
std::string JSOutPoint::ToString() const
{
return strprintf("JSOutPoint(%s, %d, %d)", hash.ToString().substr(0,10), js, n);
}
std::string COutput::ToString() const
{
return strprintf("COutput(%s, %d, %d) [%s]", tx->GetHash().ToString(), i, nDepth, FormatMoney(tx->vout[i].nValue));
}
const CWalletTx* CWallet::GetWalletTx(const uint256& hash) const
{
LOCK(cs_wallet);
std::map<uint256, CWalletTx>::const_iterator it = mapWallet.find(hash);
if (it == mapWallet.end())
return NULL;
return &(it->second);
}
// Generate a new spending key and return its public payment address
libzcash::SproutPaymentAddress CWallet::GenerateNewSproutZKey()
{
AssertLockHeld(cs_wallet); // mapSproutZKeyMetadata
auto k = SproutSpendingKey::random();
auto addr = k.address();
// Check for collision, even though it is unlikely to ever occur
if (CCryptoKeyStore::HaveSproutSpendingKey(addr))
throw std::runtime_error("CWallet::GenerateNewSproutZKey(): Collision detected");
// Create new metadata
int64_t nCreationTime = GetTime();
mapSproutZKeyMetadata[addr] = CKeyMetadata(nCreationTime);
if (!AddSproutZKey(k))
throw std::runtime_error("CWallet::GenerateNewSproutZKey(): AddSproutZKey failed");
return addr;
}
// Generate a new Sapling spending key and return its public payment address
SaplingPaymentAddress CWallet::GenerateNewSaplingZKey()
{
AssertLockHeld(cs_wallet); // mapSaplingZKeyMetadata
// Create new metadata
int64_t nCreationTime = GetTime();
CKeyMetadata metadata(nCreationTime);
// Try to get the seed
HDSeed seed;
if (!GetHDSeed(seed))
throw std::runtime_error("CWallet::GenerateNewSaplingZKey(): HD seed not found");
auto m = libzcash::SaplingExtendedSpendingKey::Master(seed);
uint32_t bip44CoinType = Params().BIP44CoinType();
// We use a fixed keypath scheme of m/32'/coin_type'/account'
// Derive m/32'
auto m_32h = m.Derive(32 | ZIP32_HARDENED_KEY_LIMIT);
// Derive m/32'/coin_type'
auto m_32h_cth = m_32h.Derive(bip44CoinType | ZIP32_HARDENED_KEY_LIMIT);
// Derive account key at next index, skip keys already known to the wallet
libzcash::SaplingExtendedSpendingKey xsk;
do
{
xsk = m_32h_cth.Derive(hdChain.saplingAccountCounter | ZIP32_HARDENED_KEY_LIMIT);
metadata.hdKeypath = "m/32'/" + std::to_string(bip44CoinType) + "'/" + std::to_string(hdChain.saplingAccountCounter) + "'";
metadata.seedFp = hdChain.seedFp;
// Increment childkey index
hdChain.saplingAccountCounter++;
} while (HaveSaplingSpendingKey(xsk.ToXFVK()));
// Update the chain model in the database
if (fFileBacked && !CWalletDB(strWalletFile).WriteHDChain(hdChain))
throw std::runtime_error("CWallet::GenerateNewSaplingZKey(): Writing HD chain model failed");
auto ivk = xsk.expsk.full_viewing_key().in_viewing_key();
mapSaplingZKeyMetadata[ivk] = metadata;
if (!AddSaplingZKey(xsk)) {
throw std::runtime_error("CWallet::GenerateNewSaplingZKey(): AddSaplingZKey failed");
}
// return default sapling payment address.
return xsk.DefaultAddress();
}
// Add spending key to keystore
bool CWallet::AddSaplingZKey(const libzcash::SaplingExtendedSpendingKey &sk)
{
AssertLockHeld(cs_wallet); // mapSaplingZKeyMetadata
if (!CCryptoKeyStore::AddSaplingSpendingKey(sk)) {
return false;
}
if (!fFileBacked) {
return true;
}
if (!IsCrypted()) {
auto ivk = sk.expsk.full_viewing_key().in_viewing_key();
return CWalletDB(strWalletFile).WriteSaplingZKey(ivk, sk, mapSaplingZKeyMetadata[ivk]);
}
return true;
}
bool CWallet::AddSaplingFullViewingKey(const libzcash::SaplingExtendedFullViewingKey &extfvk)
{
AssertLockHeld(cs_wallet);
if (!CCryptoKeyStore::AddSaplingFullViewingKey(extfvk)) {
return false;
}
if (!fFileBacked) {
return true;
}
return CWalletDB(strWalletFile).WriteSaplingExtendedFullViewingKey(extfvk);
}
// Add payment address -> incoming viewing key map entry
bool CWallet::AddSaplingIncomingViewingKey(
const libzcash::SaplingIncomingViewingKey &ivk,
const libzcash::SaplingPaymentAddress &addr)
{
AssertLockHeld(cs_wallet); // mapSaplingZKeyMetadata
if (!CCryptoKeyStore::AddSaplingIncomingViewingKey(ivk, addr)) {
return false;
}
if (!fFileBacked) {
return true;
}
if (!IsCrypted()) {
return CWalletDB(strWalletFile).WriteSaplingPaymentAddress(addr, ivk);
}
return true;
}
// Add spending key to keystore and persist to disk
bool CWallet::AddSproutZKey(const libzcash::SproutSpendingKey &key)
{
AssertLockHeld(cs_wallet); // mapSproutZKeyMetadata
auto addr = key.address();
if (!CCryptoKeyStore::AddSproutSpendingKey(key))
return false;
// check if we need to remove from viewing keys
if (HaveSproutViewingKey(addr))
RemoveSproutViewingKey(key.viewing_key());
if (!fFileBacked)
return true;
if (!IsCrypted()) {
return CWalletDB(strWalletFile).WriteZKey(addr,
key,
mapSproutZKeyMetadata[addr]);
}
return true;
}
CPubKey CWallet::GenerateNewKey()
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
bool fCompressed = CanSupportFeature(FEATURE_COMPRPUBKEY); // default to compressed public keys if we want 0.6.0 wallets
CKey secret;
secret.MakeNewKey(fCompressed);
// Compressed public keys were introduced in version 0.6.0
if (fCompressed)
SetMinVersion(FEATURE_COMPRPUBKEY);
CPubKey pubkey = secret.GetPubKey();
assert(secret.VerifyPubKey(pubkey));
// Create new metadata
int64_t nCreationTime = GetTime();
mapKeyMetadata[pubkey.GetID()] = CKeyMetadata(nCreationTime);
if (!nTimeFirstKey || nCreationTime < nTimeFirstKey)
nTimeFirstKey = nCreationTime;
if (!AddKeyPubKey(secret, pubkey))
throw std::runtime_error("CWallet::GenerateNewKey(): AddKey failed");
return pubkey;
}
bool CWallet::AddKeyPubKey(const CKey& secret, const CPubKey &pubkey)
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
if (!CCryptoKeyStore::AddKeyPubKey(secret, pubkey))
return false;
// check if we need to remove from watch-only
CScript script;
script = GetScriptForDestination(pubkey.GetID());
if (HaveWatchOnly(script))
RemoveWatchOnly(script);
script = GetScriptForRawPubKey(pubkey);
if (HaveWatchOnly(script))
RemoveWatchOnly(script);
if (!fFileBacked)
return true;
if (!IsCrypted()) {
return CWalletDB(strWalletFile).WriteKey(pubkey,
secret.GetPrivKey(),
mapKeyMetadata[pubkey.GetID()]);
}
return true;
}
bool CWallet::AddCryptedKey(const CPubKey &vchPubKey,
const vector<unsigned char> &vchCryptedSecret)
{
if (!CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret))
return false;
if (!fFileBacked)
return true;
{
LOCK(cs_wallet);
if (pwalletdbEncryption)
return pwalletdbEncryption->WriteCryptedKey(vchPubKey,
vchCryptedSecret,
mapKeyMetadata[vchPubKey.GetID()]);
else
return CWalletDB(strWalletFile).WriteCryptedKey(vchPubKey,
vchCryptedSecret,
mapKeyMetadata[vchPubKey.GetID()]);
}
return false;
}
bool CWallet::AddCryptedSproutSpendingKey(
const libzcash::SproutPaymentAddress &address,
const libzcash::ReceivingKey &rk,
const std::vector<unsigned char> &vchCryptedSecret)
{
if (!CCryptoKeyStore::AddCryptedSproutSpendingKey(address, rk, vchCryptedSecret))
return false;
if (!fFileBacked)
return true;
{
LOCK(cs_wallet);
if (pwalletdbEncryption) {
return pwalletdbEncryption->WriteCryptedZKey(address,
rk,
vchCryptedSecret,
mapSproutZKeyMetadata[address]);
} else {
return CWalletDB(strWalletFile).WriteCryptedZKey(address,
rk,
vchCryptedSecret,
mapSproutZKeyMetadata[address]);
}
}
return false;
}
bool CWallet::AddCryptedSaplingSpendingKey(const libzcash::SaplingExtendedFullViewingKey &extfvk,
const std::vector<unsigned char> &vchCryptedSecret)
{
if (!CCryptoKeyStore::AddCryptedSaplingSpendingKey(extfvk, vchCryptedSecret))
return false;
if (!fFileBacked)
return true;
{
LOCK(cs_wallet);
if (pwalletdbEncryption) {
return pwalletdbEncryption->WriteCryptedSaplingZKey(extfvk,
vchCryptedSecret,
mapSaplingZKeyMetadata[extfvk.fvk.in_viewing_key()]);
} else {
return CWalletDB(strWalletFile).WriteCryptedSaplingZKey(extfvk,
vchCryptedSecret,
mapSaplingZKeyMetadata[extfvk.fvk.in_viewing_key()]);
}
}
return false;
}
void CWallet::LoadKeyMetadata(const CPubKey &pubkey, const CKeyMetadata &meta)
{
AssertLockHeld(cs_wallet); // mapKeyMetadata
if (meta.nCreateTime && (!nTimeFirstKey || meta.nCreateTime < nTimeFirstKey))
nTimeFirstKey = meta.nCreateTime;
mapKeyMetadata[pubkey.GetID()] = meta;
}
void CWallet::LoadZKeyMetadata(const SproutPaymentAddress &addr, const CKeyMetadata &meta)
{
AssertLockHeld(cs_wallet); // mapSproutZKeyMetadata
mapSproutZKeyMetadata[addr] = meta;
}
bool CWallet::LoadCryptedKey(const CPubKey &vchPubKey, const std::vector<unsigned char> &vchCryptedSecret)
{
return CCryptoKeyStore::AddCryptedKey(vchPubKey, vchCryptedSecret);
}
bool CWallet::LoadCryptedZKey(const libzcash::SproutPaymentAddress &addr, const libzcash::ReceivingKey &rk, const std::vector<unsigned char> &vchCryptedSecret)
{
return CCryptoKeyStore::AddCryptedSproutSpendingKey(addr, rk, vchCryptedSecret);
}
bool CWallet::LoadCryptedSaplingZKey(
const libzcash::SaplingExtendedFullViewingKey &extfvk,
const std::vector<unsigned char> &vchCryptedSecret)
{
return CCryptoKeyStore::AddCryptedSaplingSpendingKey(extfvk, vchCryptedSecret);
}
void CWallet::LoadSaplingZKeyMetadata(const libzcash::SaplingIncomingViewingKey &ivk, const CKeyMetadata &meta)
{
AssertLockHeld(cs_wallet); // mapSaplingZKeyMetadata
mapSaplingZKeyMetadata[ivk] = meta;
}
bool CWallet::LoadSaplingZKey(const libzcash::SaplingExtendedSpendingKey &key)
{
return CCryptoKeyStore::AddSaplingSpendingKey(key);
}
bool CWallet::LoadSaplingFullViewingKey(const libzcash::SaplingExtendedFullViewingKey &extfvk)
{
return CCryptoKeyStore::AddSaplingFullViewingKey(extfvk);
}
bool CWallet::LoadSaplingPaymentAddress(
const libzcash::SaplingPaymentAddress &addr,
const libzcash::SaplingIncomingViewingKey &ivk)
{
return CCryptoKeyStore::AddSaplingIncomingViewingKey(ivk, addr);
}
bool CWallet::LoadZKey(const libzcash::SproutSpendingKey &key)
{
return CCryptoKeyStore::AddSproutSpendingKey(key);
}
bool CWallet::AddSproutViewingKey(const libzcash::SproutViewingKey &vk)
{
if (!CCryptoKeyStore::AddSproutViewingKey(vk)) {
return false;
}
nTimeFirstKey = 1; // No birthday information for viewing keys.
if (!fFileBacked) {
return true;
}
return CWalletDB(strWalletFile).WriteSproutViewingKey(vk);
}
bool CWallet::RemoveSproutViewingKey(const libzcash::SproutViewingKey &vk)
{
AssertLockHeld(cs_wallet);
if (!CCryptoKeyStore::RemoveSproutViewingKey(vk)) {
return false;
}
if (fFileBacked) {
if (!CWalletDB(strWalletFile).EraseSproutViewingKey(vk)) {
return false;
}
}
return true;
}
bool CWallet::LoadSproutViewingKey(const libzcash::SproutViewingKey &vk)
{
return CCryptoKeyStore::AddSproutViewingKey(vk);
}
bool CWallet::AddCScript(const CScript& redeemScript)
{
if (!CCryptoKeyStore::AddCScript(redeemScript))
return false;
if (!fFileBacked)
return true;
return CWalletDB(strWalletFile).WriteCScript(Hash160(redeemScript), redeemScript);
}
bool CWallet::LoadCScript(const CScript& redeemScript)
{
/* A sanity check was added in pull #3843 to avoid adding redeemScripts
* that never can be redeemed. However, old wallets may still contain
* these. Do not add them to the wallet and warn. */
KeyIO keyIO(Params());
if (redeemScript.size() > MAX_SCRIPT_ELEMENT_SIZE)
{
std::string strAddr = keyIO.EncodeDestination(CScriptID(redeemScript));
LogPrintf("%s: Warning: This wallet contains a redeemScript of size %i which exceeds maximum size %i thus can never be redeemed. Do not use address %s.\n",
__func__, redeemScript.size(), MAX_SCRIPT_ELEMENT_SIZE, strAddr);
return true;
}
return CCryptoKeyStore::AddCScript(redeemScript);
}
bool CWallet::AddWatchOnly(const CScript &dest)
{
if (!CCryptoKeyStore::AddWatchOnly(dest))
return false;
nTimeFirstKey = 1; // No birthday information for watch-only keys.
NotifyWatchonlyChanged(true);
if (!fFileBacked)
return true;
return CWalletDB(strWalletFile).WriteWatchOnly(dest);
}
bool CWallet::RemoveWatchOnly(const CScript &dest)
{
AssertLockHeld(cs_wallet);
if (!CCryptoKeyStore::RemoveWatchOnly(dest))
return false;
if (!HaveWatchOnly())
NotifyWatchonlyChanged(false);
if (fFileBacked)
if (!CWalletDB(strWalletFile).EraseWatchOnly(dest))
return false;
return true;
}
bool CWallet::LoadWatchOnly(const CScript &dest)
{
return CCryptoKeyStore::AddWatchOnly(dest);
}
bool CWallet::Unlock(const SecureString& strWalletPassphrase)
{
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 (CCryptoKeyStore::Unlock(vMasterKey)) {
// Now that the wallet is decrypted, ensure we have an HD seed.
// https://github.com/zcash/zcash/issues/3607
if (!this->HaveHDSeed()) {
this->GenerateNewSeed();
}
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 (CCryptoKeyStore::Unlock(vMasterKey))
{
int64_t nStartTime = GetTimeMillis();
crypter.SetKeyFromPassphrase(strNewWalletPassphrase, pMasterKey.second.vchSalt, pMasterKey.second.nDeriveIterations, pMasterKey.second.nDerivationMethod);
pMasterKey.second.nDeriveIterations = 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 + pMasterKey.second.nDeriveIterations * 100 / ((double)(GetTimeMillis() - nStartTime))) / 2;
if (pMasterKey.second.nDeriveIterations < 25000)
pMasterKey.second.nDeriveIterations = 25000;
LogPrintf("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;
CWalletDB(strWalletFile).WriteMasterKey(pMasterKey.first, pMasterKey.second);
if (fWasLocked)
Lock();
return true;
}
}
}
return false;
}
void CWallet::ChainTipAdded(const CBlockIndex *pindex,
const CBlock *pblock,
SproutMerkleTree sproutTree,
SaplingMerkleTree saplingTree)
{
IncrementNoteWitnesses(pindex, pblock, sproutTree, saplingTree);
UpdateSaplingNullifierNoteMapForBlock(pblock);
// SetBestChain() can be expensive for large wallets, so do only
// this sometimes; the wallet state will be brought up to date
// during rescanning on startup.
int64_t nNow = GetTimeMicros();
if (nLastSetChain == 0) {
// Don't flush during startup.
nLastSetChain = nNow;
}
if (++nSetChainUpdates >= WITNESS_WRITE_UPDATES ||
nLastSetChain + (int64_t)WITNESS_WRITE_INTERVAL * 1000000 < nNow) {
nLastSetChain = nNow;
nSetChainUpdates = 0;
CBlockLocator loc;
{
// The locator must be derived from the pindex used to increment
// the witnesses above; pindex can be behind chainActive.Tip().
LOCK(cs_main);
loc = chainActive.GetLocator(pindex);
}
SetBestChain(loc);
}
}
void CWallet::ChainTip(const CBlockIndex *pindex,
const CBlock *pblock,
std::optional<std::pair<SproutMerkleTree, SaplingMerkleTree>> added)
{
if (added) {
ChainTipAdded(pindex, pblock, added->first, added->second);
// Prevent migration transactions from being created when node is syncing after launch,
// and also when node wakes up from suspension/hibernation and incoming blocks are old.
if (!IsInitialBlockDownload(Params().GetConsensus()) &&
pblock->GetBlockTime() > GetTime() - 3 * 60 * 60)
{
RunSaplingMigration(pindex->nHeight);
}
} else {
DecrementNoteWitnesses(pindex);
UpdateSaplingNullifierNoteMapForBlock(pblock);
}
}
void CWallet::RunSaplingMigration(int blockHeight) {
if (!Params().GetConsensus().NetworkUpgradeActive(blockHeight, Consensus::UPGRADE_SAPLING)) {
return;
}
// need cs_wallet to call CommitTransaction()
LOCK2(cs_main, cs_wallet);
if (!fSaplingMigrationEnabled) {
return;
}
// The migration transactions to be sent in a particular batch can take
// significant time to generate, and this time depends on the speed of the user's
// computer. If they were generated only after a block is seen at the target
// height minus 1, then this could leak information. Therefore, for target
// height N, implementations SHOULD start generating the transactions at around
// height N-5
if (blockHeight % 500 == 495) {
std::shared_ptr<AsyncRPCQueue> q = getAsyncRPCQueue();
std::shared_ptr<AsyncRPCOperation> lastOperation = q->getOperationForId(saplingMigrationOperationId);
if (lastOperation != nullptr) {
lastOperation->cancel();
}
pendingSaplingMigrationTxs.clear();
std::shared_ptr<AsyncRPCOperation> operation(new AsyncRPCOperation_saplingmigration(blockHeight + 5));
saplingMigrationOperationId = operation->getId();
q->addOperation(operation);
} else if (blockHeight % 500 == 499) {
std::shared_ptr<AsyncRPCQueue> q = getAsyncRPCQueue();
std::shared_ptr<AsyncRPCOperation> lastOperation = q->getOperationForId(saplingMigrationOperationId);
if (lastOperation != nullptr) {
lastOperation->cancel();
}
for (const CTransaction& transaction : pendingSaplingMigrationTxs) {
// Send the transaction
CWalletTx wtx(this, transaction);
CommitTransaction(wtx, std::nullopt);
}
pendingSaplingMigrationTxs.clear();
}
}
void CWallet::AddPendingSaplingMigrationTx(const CTransaction& tx) {
LOCK(cs_wallet);
pendingSaplingMigrationTxs.push_back(tx);
}
void CWallet::SetBestChain(const CBlockLocator& loc)
{
CWalletDB walletdb(strWalletFile);
SetBestChainINTERNAL(walletdb, loc);
}
std::set<std::pair<libzcash::PaymentAddress, uint256>> CWallet::GetNullifiersForAddresses(
const std::set<libzcash::PaymentAddress> & addresses)
{
std::set<std::pair<libzcash::PaymentAddress, uint256>> nullifierSet;
// Sapling ivk -> list of addrs map
// (There may be more than one diversified address for a given ivk.)
std::map<libzcash::SaplingIncomingViewingKey, std::vector<libzcash::SaplingPaymentAddress>> ivkMap;
for (const auto & addr : addresses) {
auto saplingAddr = std::get_if<libzcash::SaplingPaymentAddress>(&addr);
if (saplingAddr != nullptr) {
libzcash::SaplingIncomingViewingKey ivk;
this->GetSaplingIncomingViewingKey(*saplingAddr, ivk);
ivkMap[ivk].push_back(*saplingAddr);
}
}
for (const auto & txPair : mapWallet) {
// Sprout
for (const auto & noteDataPair : txPair.second.mapSproutNoteData) {
auto & noteData = noteDataPair.second;
auto & nullifier = noteData.nullifier;
auto & address = noteData.address;
if (nullifier && addresses.count(address)) {
nullifierSet.insert(std::make_pair(address, nullifier.value()));
}
}
// Sapling
for (const auto & noteDataPair : txPair.second.mapSaplingNoteData) {
auto & noteData = noteDataPair.second;
auto & nullifier = noteData.nullifier;
auto & ivk = noteData.ivk;
if (nullifier && ivkMap.count(ivk)) {
for (const auto & addr : ivkMap[ivk]) {
nullifierSet.insert(std::make_pair(addr, nullifier.value()));
}
}
}
}
return nullifierSet;
}
bool CWallet::IsNoteSproutChange(
const std::set<std::pair<libzcash::PaymentAddress, uint256>> & nullifierSet,
const PaymentAddress & address,
const JSOutPoint & jsop)
{
// A Note is marked as "change" if the address that received it
// also spent Notes in the same transaction. This will catch,
// for instance:
// - Change created by spending fractions of Notes (because
// z_sendmany sends change to the originating z-address).
// - "Chaining Notes" used to connect JoinSplits together.
// - Notes created by consolidation transactions (e.g. using
// z_mergetoaddress).
// - Notes sent from one address to itself.
for (const JSDescription & jsd : mapWallet[jsop.hash].vJoinSplit) {
for (const uint256 & nullifier : jsd.nullifiers) {
if (nullifierSet.count(std::make_pair(address, nullifier))) {
return true;
}
}
}
return false;
}
bool CWallet::IsNoteSaplingChange(const std::set<std::pair<libzcash::PaymentAddress, uint256>> & nullifierSet,
const libzcash::PaymentAddress & address,
const SaplingOutPoint & op)
{
// A Note is marked as "change" if the address that received it
// also spent Notes in the same transaction. This will catch,
// for instance:
// - Change created by spending fractions of Notes (because
// z_sendmany sends change to the originating z-address).
// - Notes created by consolidation transactions (e.g. using
// z_mergetoaddress).
// - Notes sent from one address to itself.
for (const SpendDescription &spend : mapWallet[op.hash].vShieldedSpend) {
if (nullifierSet.count(std::make_pair(address, spend.nullifier))) {
return true;
}
}
return false;
}
bool CWallet::SetMinVersion(enum WalletFeature nVersion, CWalletDB* pwalletdbIn, bool fExplicit)
{
LOCK(cs_wallet); // nWalletVersion
if (nWalletVersion >= nVersion)
return true;
// when doing an explicit upgrade, if we pass the max version permitted, upgrade all the way
if (fExplicit && nVersion > nWalletMaxVersion)
nVersion = FEATURE_LATEST;
nWalletVersion = nVersion;
if (nVersion > nWalletMaxVersion)
nWalletMaxVersion = nVersion;
if (fFileBacked)
{
CWalletDB* pwalletdb = pwalletdbIn ? pwalletdbIn : new CWalletDB(strWalletFile);
if (nWalletVersion > 40000)
pwalletdb->WriteMinVersion(nWalletVersion);
if (!pwalletdbIn)
delete pwalletdb;
}
return true;
}
bool CWallet::SetMaxVersion(int nVersion)
{
LOCK(cs_wallet); // nWalletVersion, nWalletMaxVersion
// cannot downgrade below current version
if (nWalletVersion > nVersion)
return false;
nWalletMaxVersion = nVersion;
return true;
}
set<uint256> CWallet::GetConflicts(const uint256& txid) const
{
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.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);
}
std::pair<TxNullifiers::const_iterator, TxNullifiers::const_iterator> range_n;
for (const JSDescription& jsdesc : wtx.vJoinSplit) {
for (const uint256& nullifier : jsdesc.nullifiers) {
if (mapTxSproutNullifiers.count(nullifier) <= 1) {
continue; // No conflict if zero or one spends
}
range_n = mapTxSproutNullifiers.equal_range(nullifier);
for (TxNullifiers::const_iterator it = range_n.first; it != range_n.second; ++it) {
result.insert(it->second);
}
}
}
std::pair<TxNullifiers::const_iterator, TxNullifiers::const_iterator> range_o;
for (const SpendDescription &spend : wtx.vShieldedSpend) {
uint256 nullifier = spend.nullifier;
if (mapTxSaplingNullifiers.count(nullifier) <= 1) {
continue; // No conflict if zero or one spends
}
range_o = mapTxSaplingNullifiers.equal_range(nullifier);
for (TxNullifiers::const_iterator it = range_o.first; it != range_o.second; ++it) {
result.insert(it->second);
}
}
return result;
}
void CWallet::Flush(bool shutdown)
{
bitdb.Flush(shutdown);
}
bool static UIError(const std::string &str)
{
uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_ERROR);
return false;
}
void static UIWarning(const std::string &str)
{
uiInterface.ThreadSafeMessageBox(str, "", CClientUIInterface::MSG_WARNING);
}
static std::string AmountErrMsg(const char * const optname, const std::string& strValue)
{
return strprintf(_("Invalid amount for -%s=<amount>: '%s'"), optname, strValue);
}
bool CWallet::Verify()
{
std::string walletFile = GetArg("-wallet", DEFAULT_WALLET_DAT);
LogPrintf("Using wallet %s\n", walletFile);
uiInterface.InitMessage(_("Verifying wallet..."));
if (walletFile != fs::basename(walletFile) + fs::extension(walletFile)) {
fs::path path(walletFile);
if (path.is_absolute()) {
if (!fs::exists(path.parent_path())) {
return UIError(strprintf(_("Absolute path %s does not exist"), walletFile));
}
} else {
fs::path full_path = GetDataDir() / path;
if (!fs::exists(full_path.parent_path())) {
return UIError(strprintf(_("Relative path %s does not exist"), walletFile));
}
}
}
if (!bitdb.Open(GetDataDir()))
{
// try moving the database env out of the way
fs::path pathDatabase = GetDataDir() / "database";
fs::path pathDatabaseBak = GetDataDir() / strprintf("database.%d.bak", GetTime());
try {
fs::rename(pathDatabase, pathDatabaseBak);
LogPrintf("Moved old %s to %s. Retrying.\n", pathDatabase.string(), pathDatabaseBak.string());
} catch (const fs::filesystem_error&) {
// failure is ok (well, not really, but it's not worse than what we started with)
}
// try again
if (!bitdb.Open(GetDataDir())) {
// if it still fails, it probably means we can't even create the database env
return UIError(strprintf(_("Error initializing wallet database environment %s!"), GetDataDir()));
}
}
if (GetBoolArg("-salvagewallet", false))
{
// Recover readable keypairs:
if (!CWalletDB::Recover(bitdb, walletFile, true))
return false;
}
if (fs::exists(GetDataDir() / walletFile))
{
CDBEnv::VerifyResult r = bitdb.Verify(walletFile, CWalletDB::Recover);
if (r == CDBEnv::RECOVER_OK)
{
UIWarning(strprintf(_("Warning: Wallet file corrupt, data salvaged!"
" Original %s saved as %s in %s; if"
" your balance or transactions are incorrect you should"
" restore from a backup."),
walletFile, "wallet.{timestamp}.bak", GetDataDir()));
}
if (r == CDBEnv::RECOVER_FAIL)
return UIError(strprintf(_("%s corrupt, salvage failed"), walletFile));
}
return true;
}
template <class T>
void CWallet::SyncMetaData(pair<typename TxSpendMap<T>::iterator, typename TxSpendMap<T>::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 = NULL;
for (typename TxSpendMap<T>::iterator it = range.first; it != range.second; ++it)
{
const uint256& hash = it->second;
int n = mapWallet[hash].nOrderPos;
if (n < nMinOrderPos)
{
nMinOrderPos = n;
copyFrom = &mapWallet[hash];
}
}
// Now copy data from copyFrom to rest:
for (typename TxSpendMap<T>::iterator it = range.first; it != range.second; ++it)
{
const uint256& hash = it->second;
CWalletTx* copyTo = &mapWallet[hash];
if (copyFrom == copyTo) continue;
copyTo->mapValue = copyFrom->mapValue;
// mapSproutNoteData and mapSaplingNoteData not copied on purpose
// (it is always set correctly for each CWalletTx)
copyTo->vOrderForm = copyFrom->vOrderForm;
// fTimeReceivedIsTxTime not copied on purpose
// nTimeReceived not copied on purpose
copyTo->nTimeSmart = copyFrom->nTimeSmart;
copyTo->fFromMe = copyFrom->fFromMe;
copyTo->strFromAccount = copyFrom->strFromAccount;
// nOrderPos not copied on purpose
// cached members not copied on purpose
}
}
/**
* Outpoint is spent if any non-conflicted transaction
* spends it:
*/
bool CWallet::IsSpent(const uint256& hash, unsigned int n) const
{
const COutPoint outpoint(hash, n);
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() && mit->second.GetDepthInMainChain() >= 0)
return true; // Spent