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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2017 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 <chainparams.h>
#include <init.h>
#include <net.h>
#include <scheduler.h>
#include <outputtype.h>
#include <util.h>
#include <utilmoneystr.h>
#include <validation.h>
#include <walletinitinterface.h>
#include <wallet/rpcwallet.h>
#include <wallet/wallet.h>
#include <wallet/walletutil.h>
class WalletInit : public WalletInitInterface {
public:
//! Return the wallets help message.
void AddWalletOptions() const override;
//! Wallets parameter interaction
bool ParameterInteraction() const override;
//! Register wallet RPCs.
void RegisterRPC(CRPCTable &tableRPC) const override;
//! Responsible for reading and validating the -wallet arguments and verifying the wallet database.
// This function will perform salvage on the wallet if requested, as long as only one wallet is
// being loaded (WalletParameterInteraction forbids -salvagewallet, -zapwallettxes or -upgradewallet with multiwallet).
bool Verify() const override;
//! Load wallet databases.
bool Open() const override;
//! Complete startup of wallets.
void Start(CScheduler& scheduler) const override;
//! Flush all wallets in preparation for shutdown.
void Flush() const override;
//! Stop all wallets. Wallets will be flushed first.
void Stop() const override;
//! Close all wallets.
void Close() const override;
};
const WalletInitInterface& g_wallet_init_interface = WalletInit();
void WalletInit::AddWalletOptions() const
{
gArgs.AddArg("-addresstype", strprintf("What type of addresses to use (\"legacy\", \"p2sh-segwit\", or \"bech32\", default: \"%s\")", FormatOutputType(DEFAULT_ADDRESS_TYPE)), false, OptionsCategory::WALLET);
gArgs.AddArg("-changetype", "What type of change to use (\"legacy\", \"p2sh-segwit\", or \"bech32\"). Default is same as -addresstype, except when -addresstype=p2sh-segwit a native segwit output is used when sending to a native segwit address)", false, OptionsCategory::WALLET);
gArgs.AddArg("-disablewallet", "Do not load the wallet and disable wallet RPC calls", false, OptionsCategory::WALLET);
gArgs.AddArg("-discardfee=<amt>", strprintf("The fee rate (in %s/kB) that indicates your tolerance for discarding change by adding it to the fee (default: %s). "
"Note: An output is discarded if it is dust at this rate, but we will always discard up to the dust relay fee and a discard fee above that is limited by the fee estimate for the longest target",
CURRENCY_UNIT, FormatMoney(DEFAULT_DISCARD_FEE)), false, OptionsCategory::WALLET);
gArgs.AddArg("-fallbackfee=<amt>", strprintf("A fee rate (in %s/kB) that will be used when fee estimation has insufficient data (default: %s)",
CURRENCY_UNIT, FormatMoney(DEFAULT_FALLBACK_FEE)), false, OptionsCategory::WALLET);
gArgs.AddArg("-keypool=<n>", strprintf("Set key pool size to <n> (default: %u)", DEFAULT_KEYPOOL_SIZE), false, OptionsCategory::WALLET);
gArgs.AddArg("-mintxfee=<amt>", strprintf("Fees (in %s/kB) smaller than this are considered zero fee for transaction creation (default: %s)",
CURRENCY_UNIT, FormatMoney(DEFAULT_TRANSACTION_MINFEE)), false, OptionsCategory::WALLET);
gArgs.AddArg("-paytxfee=<amt>", strprintf("Fee (in %s/kB) to add to transactions you send (default: %s)",
CURRENCY_UNIT, FormatMoney(CFeeRate{DEFAULT_PAY_TX_FEE}.GetFeePerK())), false, OptionsCategory::WALLET);
gArgs.AddArg("-rescan", "Rescan the block chain for missing wallet transactions on startup", false, OptionsCategory::WALLET);
gArgs.AddArg("-salvagewallet", "Attempt to recover private keys from a corrupt wallet on startup", false, OptionsCategory::WALLET);
gArgs.AddArg("-spendzeroconfchange", strprintf("Spend unconfirmed change when sending transactions (default: %u)", DEFAULT_SPEND_ZEROCONF_CHANGE), false, OptionsCategory::WALLET);
gArgs.AddArg("-txconfirmtarget=<n>", strprintf("If paytxfee is not set, include enough fee so transactions begin confirmation on average within n blocks (default: %u)", DEFAULT_TX_CONFIRM_TARGET), false, OptionsCategory::WALLET);
gArgs.AddArg("-upgradewallet", "Upgrade wallet to latest format on startup", false, OptionsCategory::WALLET);
gArgs.AddArg("-wallet=<path>", "Specify wallet database path. Can be specified multiple times to load multiple wallets. Path is interpreted relative to <walletdir> if it is not absolute, and will be created if it does not exist (as a directory containing a wallet.dat file and log files). For backwards compatibility this will also accept names of existing data files in <walletdir>.)", false, OptionsCategory::WALLET);
gArgs.AddArg("-walletbroadcast", strprintf("Make the wallet broadcast transactions (default: %u)", DEFAULT_WALLETBROADCAST), false, OptionsCategory::WALLET);
gArgs.AddArg("-walletdir=<dir>", "Specify directory to hold wallets (default: <datadir>/wallets if it exists, otherwise <datadir>)", false, OptionsCategory::WALLET);
gArgs.AddArg("-walletnotify=<cmd>", "Execute command when a wallet transaction changes (%s in cmd is replaced by TxID)", false, OptionsCategory::WALLET);
gArgs.AddArg("-walletrbf", strprintf("Send transactions with full-RBF opt-in enabled (RPC only, default: %u)", DEFAULT_WALLET_RBF), false, OptionsCategory::WALLET);
gArgs.AddArg("-zapwallettxes=<mode>", "Delete all wallet transactions and only recover those parts of the blockchain through -rescan on startup"
" (1 = keep tx meta data e.g. account owner and payment request information, 2 = drop tx meta data)", false, OptionsCategory::WALLET);
gArgs.AddArg("-dblogsize=<n>", strprintf("Flush wallet database activity from memory to disk log every <n> megabytes (default: %u)", DEFAULT_WALLET_DBLOGSIZE), true, OptionsCategory::WALLET_DEBUG_TEST);
gArgs.AddArg("-flushwallet", strprintf("Run a thread to flush wallet periodically (default: %u)", DEFAULT_FLUSHWALLET), true, OptionsCategory::WALLET_DEBUG_TEST);
gArgs.AddArg("-privdb", strprintf("Sets the DB_PRIVATE flag in the wallet db environment (default: %u)", DEFAULT_WALLET_PRIVDB), true, OptionsCategory::WALLET_DEBUG_TEST);
gArgs.AddArg("-walletrejectlongchains", strprintf("Wallet will not create transactions that violate mempool chain limits (default: %u)", DEFAULT_WALLET_REJECT_LONG_CHAINS), true, OptionsCategory::WALLET_DEBUG_TEST);
}
bool WalletInit::ParameterInteraction() const
{
if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
for (const std::string& wallet : gArgs.GetArgs("-wallet")) {
LogPrintf("%s: parameter interaction: -disablewallet -> ignoring -wallet=%s\n", __func__, wallet);
}
return true;
}
gArgs.SoftSetArg("-wallet", "");
const bool is_multiwallet = gArgs.GetArgs("-wallet").size() > 1;
if (gArgs.GetBoolArg("-blocksonly", DEFAULT_BLOCKSONLY) && gArgs.SoftSetBoolArg("-walletbroadcast", false)) {
LogPrintf("%s: parameter interaction: -blocksonly=1 -> setting -walletbroadcast=0\n", __func__);
}
if (gArgs.GetBoolArg("-salvagewallet", false)) {
if (is_multiwallet) {
return InitError(strprintf("%s is only allowed with a single wallet file", "-salvagewallet"));
}
// Rewrite just private keys: rescan to find transactions
if (gArgs.SoftSetBoolArg("-rescan", true)) {
LogPrintf("%s: parameter interaction: -salvagewallet=1 -> setting -rescan=1\n", __func__);
}
}
bool zapwallettxes = gArgs.GetBoolArg("-zapwallettxes", false);
// -zapwallettxes implies dropping the mempool on startup
if (zapwallettxes && gArgs.SoftSetBoolArg("-persistmempool", false)) {
LogPrintf("%s: parameter interaction: -zapwallettxes enabled -> setting -persistmempool=0\n", __func__);
}
// -zapwallettxes implies a rescan
if (zapwallettxes) {
if (is_multiwallet) {
return InitError(strprintf("%s is only allowed with a single wallet file", "-zapwallettxes"));
}
if (gArgs.SoftSetBoolArg("-rescan", true)) {
LogPrintf("%s: parameter interaction: -zapwallettxes enabled -> setting -rescan=1\n", __func__);
}
}
if (is_multiwallet) {
if (gArgs.GetBoolArg("-upgradewallet", false)) {
return InitError(strprintf("%s is only allowed with a single wallet file", "-upgradewallet"));
}
}
if (gArgs.GetBoolArg("-sysperms", false))
return InitError("-sysperms is not allowed in combination with enabled wallet functionality");
if (gArgs.GetArg("-prune", 0) && gArgs.GetBoolArg("-rescan", false))
return InitError(_("Rescans are not possible in pruned mode. You will need to use -reindex which will download the whole blockchain again."));
if (::minRelayTxFee.GetFeePerK() > HIGH_TX_FEE_PER_KB)
InitWarning(AmountHighWarn("-minrelaytxfee") + " " +
_("The wallet will avoid paying less than the minimum relay fee."));
if (gArgs.IsArgSet("-maxtxfee"))
{
CAmount nMaxFee = 0;
if (!ParseMoney(gArgs.GetArg("-maxtxfee", ""), nMaxFee))
return InitError(AmountErrMsg("maxtxfee", gArgs.GetArg("-maxtxfee", "")));
if (nMaxFee > HIGH_MAX_TX_FEE)
InitWarning(_("-maxtxfee is set very high! Fees this large could be paid on a single transaction."));
maxTxFee = nMaxFee;
if (CFeeRate(maxTxFee, 1000) < ::minRelayTxFee)
{
return InitError(strprintf(_("Invalid amount for -maxtxfee=<amount>: '%s' (must be at least the minrelay fee of %s to prevent stuck transactions)"),
gArgs.GetArg("-maxtxfee", ""), ::minRelayTxFee.ToString()));
}
}
return true;
}
void WalletInit::RegisterRPC(CRPCTable &t) const
{
if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
return;
}
RegisterWalletRPCCommands(t);
}
bool WalletInit::Verify() const
{
if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
return true;
}
if (gArgs.IsArgSet("-walletdir")) {
fs::path wallet_dir = gArgs.GetArg("-walletdir", "");
if (!fs::exists(wallet_dir)) {
return InitError(strprintf(_("Specified -walletdir \"%s\" does not exist"), wallet_dir.string()));
} else if (!fs::is_directory(wallet_dir)) {
return InitError(strprintf(_("Specified -walletdir \"%s\" is not a directory"), wallet_dir.string()));
} else if (!wallet_dir.is_absolute()) {
return InitError(strprintf(_("Specified -walletdir \"%s\" is a relative path"), wallet_dir.string()));
}
}
LogPrintf("Using wallet directory %s\n", GetWalletDir().string());
uiInterface.InitMessage(_("Verifying wallet(s)..."));
std::vector<std::string> wallet_files = gArgs.GetArgs("-wallet");
// Parameter interaction code should have thrown an error if -salvagewallet
// was enabled with more than wallet file, so the wallet_files size check
// here should have no effect.
bool salvage_wallet = gArgs.GetBoolArg("-salvagewallet", false) && wallet_files.size() <= 1;
// Keep track of each wallet absolute path to detect duplicates.
std::set<fs::path> wallet_paths;
for (const auto& wallet_file : wallet_files) {
fs::path wallet_path = fs::absolute(wallet_file, GetWalletDir());
if (!wallet_paths.insert(wallet_path).second) {
return InitError(strprintf(_("Error loading wallet %s. Duplicate -wallet filename specified."), wallet_file));
}
std::string error_string;
std::string warning_string;
bool verify_success = CWallet::Verify(wallet_file, salvage_wallet, error_string, warning_string);
if (!error_string.empty()) InitError(error_string);
if (!warning_string.empty()) InitWarning(warning_string);
if (!verify_success) return false;
}
return true;
}
bool WalletInit::Open() const
{
if (gArgs.GetBoolArg("-disablewallet", DEFAULT_DISABLE_WALLET)) {
LogPrintf("Wallet disabled!\n");
return true;
}
for (const std::string& walletFile : gArgs.GetArgs("-wallet")) {
std::shared_ptr<CWallet> pwallet = CWallet::CreateWalletFromFile(walletFile, fs::absolute(walletFile, GetWalletDir()));
if (!pwallet) {
return false;
}
AddWallet(pwallet);
}
return true;
}
void WalletInit::Start(CScheduler& scheduler) const
{
for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
pwallet->postInitProcess();
}
// Run a thread to flush wallet periodically
scheduler.scheduleEvery(MaybeCompactWalletDB, 500);
}
void WalletInit::Flush() const
{
for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
pwallet->Flush(false);
}
}
void WalletInit::Stop() const
{
for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
pwallet->Flush(true);
}
}
void WalletInit::Close() const
{
for (const std::shared_ptr<CWallet>& pwallet : GetWallets()) {
RemoveWallet(pwallet);
}
}
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