2b400f74b5
Mixing on a newer version with small number of upgraded masternodes causes mixing txes to "stuck" - old nodes refuse to relay dstxes from new ones because they come from the same masternodes too often. Basing threshold on the total number of up to date masternodes and not only on a newer (enabled) ones should solve this. This however will cause mixing to fail if there are not enough masternodes on the needed protocol version (i.e. at least GetMinMasternodePaymentsProto()) but it's better to stop mixing than having funds kind of spent yet not confirmed for a long time.
865 lines
34 KiB
C++
865 lines
34 KiB
C++
// Copyright (c) 2014-2018 The Dash Core developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "privatesend-server.h"
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#include "activemasternode.h"
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#include "consensus/validation.h"
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#include "core_io.h"
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#include "init.h"
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#include "masternode-sync.h"
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#include "masternodeman.h"
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#include "netmessagemaker.h"
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#include "script/interpreter.h"
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#include "txmempool.h"
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#include "util.h"
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#include "utilmoneystr.h"
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CPrivateSendServer privateSendServer;
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void CPrivateSendServer::ProcessMessage(CNode* pfrom, const std::string& strCommand, CDataStream& vRecv, CConnman& connman)
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{
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if (!fMasternodeMode) return;
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if (fLiteMode) return; // ignore all Dash related functionality
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if (!masternodeSync.IsBlockchainSynced()) return;
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if (strCommand == NetMsgType::DSACCEPT) {
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if (pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
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LogPrint("privatesend", "DSACCEPT -- peer=%d using obsolete version %i\n", pfrom->id, pfrom->nVersion);
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connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetSendVersion()).Make(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE, strprintf("Version must be %d or greater", MIN_PRIVATESEND_PEER_PROTO_VERSION)));
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PushStatus(pfrom, STATUS_REJECTED, ERR_VERSION, connman);
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return;
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}
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if (IsSessionReady()) {
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// too many users in this session already, reject new ones
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LogPrintf("DSACCEPT -- queue is already full!\n");
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PushStatus(pfrom, STATUS_ACCEPTED, ERR_QUEUE_FULL, connman);
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return;
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}
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CPrivateSendAccept dsa;
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vRecv >> dsa;
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LogPrint("privatesend", "DSACCEPT -- nDenom %d (%s) txCollateral %s", dsa.nDenom, CPrivateSend::GetDenominationsToString(dsa.nDenom), dsa.txCollateral.ToString());
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masternode_info_t mnInfo;
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if (!mnodeman.GetMasternodeInfo(activeMasternodeInfo.outpoint, mnInfo)) {
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PushStatus(pfrom, STATUS_REJECTED, ERR_MN_LIST, connman);
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return;
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}
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if (vecSessionCollaterals.size() == 0 && mnInfo.nLastDsq != 0 &&
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mnInfo.nLastDsq + mnodeman.CountEnabled(MIN_PRIVATESEND_PEER_PROTO_VERSION) / 5 > mnodeman.nDsqCount) {
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LogPrintf("DSACCEPT -- last dsq too recent, must wait: addr=%s\n", pfrom->addr.ToString());
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PushStatus(pfrom, STATUS_REJECTED, ERR_RECENT, connman);
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return;
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}
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PoolMessage nMessageID = MSG_NOERR;
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bool fResult = nSessionID == 0 ? CreateNewSession(dsa, nMessageID, connman)
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: AddUserToExistingSession(dsa, nMessageID);
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if (fResult) {
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LogPrintf("DSACCEPT -- is compatible, please submit!\n");
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PushStatus(pfrom, STATUS_ACCEPTED, nMessageID, connman);
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return;
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} else {
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LogPrintf("DSACCEPT -- not compatible with existing transactions!\n");
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PushStatus(pfrom, STATUS_REJECTED, nMessageID, connman);
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return;
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}
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} else if (strCommand == NetMsgType::DSQUEUE) {
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TRY_LOCK(cs_vecqueue, lockRecv);
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if (!lockRecv) return;
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if (pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
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LogPrint("privatesend", "DSQUEUE -- peer=%d using obsolete version %i\n", pfrom->id, pfrom->nVersion);
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connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetSendVersion()).Make(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE, strprintf("Version must be %d or greater", MIN_PRIVATESEND_PEER_PROTO_VERSION)));
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return;
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}
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CPrivateSendQueue dsq;
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vRecv >> dsq;
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// process every dsq only once
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for (const auto& q : vecPrivateSendQueue) {
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if (q == dsq) {
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// LogPrint("privatesend", "DSQUEUE -- %s seen\n", dsq.ToString());
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return;
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}
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}
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LogPrint("privatesend", "DSQUEUE -- %s new\n", dsq.ToString());
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if (dsq.IsExpired()) return;
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masternode_info_t mnInfo;
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if (!mnodeman.GetMasternodeInfo(dsq.masternodeOutpoint, mnInfo)) return;
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if (!dsq.CheckSignature(mnInfo.legacyKeyIDOperator, mnInfo.blsPubKeyOperator)) {
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// we probably have outdated info
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mnodeman.AskForMN(pfrom, dsq.masternodeOutpoint, connman);
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return;
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}
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if (!dsq.fReady) {
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for (const auto& q : vecPrivateSendQueue) {
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if (q.masternodeOutpoint == dsq.masternodeOutpoint) {
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// no way same mn can send another "not yet ready" dsq this soon
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LogPrint("privatesend", "DSQUEUE -- Masternode %s is sending WAY too many dsq messages\n", mnInfo.addr.ToString());
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return;
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}
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}
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int nThreshold = mnInfo.nLastDsq + mnodeman.CountMasternodes() / 5;
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LogPrint("privatesend", "DSQUEUE -- nLastDsq: %d threshold: %d nDsqCount: %d\n", mnInfo.nLastDsq, nThreshold, mnodeman.nDsqCount);
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//don't allow a few nodes to dominate the queuing process
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if (mnInfo.nLastDsq != 0 && nThreshold > mnodeman.nDsqCount) {
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LogPrint("privatesend", "DSQUEUE -- Masternode %s is sending too many dsq messages\n", mnInfo.addr.ToString());
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return;
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}
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mnodeman.AllowMixing(dsq.masternodeOutpoint);
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LogPrint("privatesend", "DSQUEUE -- new PrivateSend queue (%s) from masternode %s\n", dsq.ToString(), mnInfo.addr.ToString());
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vecPrivateSendQueue.push_back(dsq);
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dsq.Relay(connman);
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}
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} else if (strCommand == NetMsgType::DSVIN) {
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if (pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
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LogPrint("privatesend", "DSVIN -- peer=%d using obsolete version %i\n", pfrom->id, pfrom->nVersion);
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connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetSendVersion()).Make(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE, strprintf("Version must be %d or greater", MIN_PRIVATESEND_PEER_PROTO_VERSION)));
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PushStatus(pfrom, STATUS_REJECTED, ERR_VERSION, connman);
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return;
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}
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//do we have enough users in the current session?
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if (!IsSessionReady()) {
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LogPrintf("DSVIN -- session not complete!\n");
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PushStatus(pfrom, STATUS_REJECTED, ERR_SESSION, connman);
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return;
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}
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CPrivateSendEntry entry;
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vRecv >> entry;
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LogPrint("privatesend", "DSVIN -- txCollateral %s", entry.txCollateral->ToString());
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if (entry.vecTxDSIn.size() > PRIVATESEND_ENTRY_MAX_SIZE) {
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LogPrintf("DSVIN -- ERROR: too many inputs! %d/%d\n", entry.vecTxDSIn.size(), PRIVATESEND_ENTRY_MAX_SIZE);
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PushStatus(pfrom, STATUS_REJECTED, ERR_MAXIMUM, connman);
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return;
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}
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if (entry.vecTxOut.size() > PRIVATESEND_ENTRY_MAX_SIZE) {
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LogPrintf("DSVIN -- ERROR: too many outputs! %d/%d\n", entry.vecTxOut.size(), PRIVATESEND_ENTRY_MAX_SIZE);
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PushStatus(pfrom, STATUS_REJECTED, ERR_MAXIMUM, connman);
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return;
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}
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//do we have the same denominations as the current session?
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if (!IsOutputsCompatibleWithSessionDenom(entry.vecTxOut)) {
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LogPrintf("DSVIN -- not compatible with existing transactions!\n");
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PushStatus(pfrom, STATUS_REJECTED, ERR_EXISTING_TX, connman);
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return;
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}
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//check it like a transaction
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{
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CAmount nValueIn = 0;
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CAmount nValueOut = 0;
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CMutableTransaction tx;
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for (const auto& txout : entry.vecTxOut) {
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nValueOut += txout.nValue;
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tx.vout.push_back(txout);
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if (txout.scriptPubKey.size() != 25) {
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LogPrintf("DSVIN -- non-standard pubkey detected! scriptPubKey=%s\n", ScriptToAsmStr(txout.scriptPubKey));
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PushStatus(pfrom, STATUS_REJECTED, ERR_NON_STANDARD_PUBKEY, connman);
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return;
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}
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if (!txout.scriptPubKey.IsPayToPublicKeyHash()) {
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LogPrintf("DSVIN -- invalid script! scriptPubKey=%s\n", ScriptToAsmStr(txout.scriptPubKey));
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PushStatus(pfrom, STATUS_REJECTED, ERR_INVALID_SCRIPT, connman);
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return;
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}
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}
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for (const auto& txin : entry.vecTxDSIn) {
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tx.vin.push_back(txin);
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LogPrint("privatesend", "DSVIN -- txin=%s\n", txin.ToString());
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Coin coin;
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if (GetUTXOCoin(txin.prevout, coin)) {
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nValueIn += coin.out.nValue;
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} else {
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LogPrintf("DSVIN -- missing input! txin=%s\n", txin.ToString());
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PushStatus(pfrom, STATUS_REJECTED, ERR_MISSING_TX, connman);
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return;
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}
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}
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// There should be no fee in mixing tx
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CAmount nFee = nValueIn - nValueOut;
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if (nFee != 0) {
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LogPrintf("DSVIN -- there should be no fee in mixing tx! fees: %lld, tx=%s", nFee, tx.ToString());
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PushStatus(pfrom, STATUS_REJECTED, ERR_FEES, connman);
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return;
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}
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}
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PoolMessage nMessageID = MSG_NOERR;
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entry.addr = pfrom->addr;
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if (AddEntry(entry, nMessageID)) {
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PushStatus(pfrom, STATUS_ACCEPTED, nMessageID, connman);
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CheckPool(connman);
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RelayStatus(STATUS_ACCEPTED, connman);
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} else {
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PushStatus(pfrom, STATUS_REJECTED, nMessageID, connman);
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SetNull();
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}
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} else if (strCommand == NetMsgType::DSSIGNFINALTX) {
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if (pfrom->nVersion < MIN_PRIVATESEND_PEER_PROTO_VERSION) {
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LogPrint("privatesend", "DSSIGNFINALTX -- peer=%d using obsolete version %i\n", pfrom->id, pfrom->nVersion);
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connman.PushMessage(pfrom, CNetMsgMaker(pfrom->GetSendVersion()).Make(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE, strprintf("Version must be %d or greater", MIN_PRIVATESEND_PEER_PROTO_VERSION)));
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return;
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}
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std::vector<CTxIn> vecTxIn;
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vRecv >> vecTxIn;
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LogPrint("privatesend", "DSSIGNFINALTX -- vecTxIn.size() %s\n", vecTxIn.size());
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int nTxInIndex = 0;
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int nTxInsCount = (int)vecTxIn.size();
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for (const auto& txin : vecTxIn) {
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nTxInIndex++;
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if (!AddScriptSig(txin)) {
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LogPrint("privatesend", "DSSIGNFINALTX -- AddScriptSig() failed at %d/%d, session: %d\n", nTxInIndex, nTxInsCount, nSessionID);
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RelayStatus(STATUS_REJECTED, connman);
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return;
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}
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LogPrint("privatesend", "DSSIGNFINALTX -- AddScriptSig() %d/%d success\n", nTxInIndex, nTxInsCount);
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}
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// all is good
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CheckPool(connman);
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}
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}
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void CPrivateSendServer::SetNull()
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{
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// MN side
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vecSessionCollaterals.clear();
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CPrivateSendBaseSession::SetNull();
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CPrivateSendBaseManager::SetNull();
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}
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//
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// Check the mixing progress and send client updates if a Masternode
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//
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void CPrivateSendServer::CheckPool(CConnman& connman)
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{
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if (!fMasternodeMode) return;
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LogPrint("privatesend", "CPrivateSendServer::CheckPool -- entries count %lu\n", GetEntriesCount());
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// If entries are full, create finalized transaction
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if (nState == POOL_STATE_ACCEPTING_ENTRIES && GetEntriesCount() >= CPrivateSend::GetMaxPoolTransactions()) {
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LogPrint("privatesend", "CPrivateSendServer::CheckPool -- FINALIZE TRANSACTIONS\n");
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CreateFinalTransaction(connman);
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return;
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}
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// If we have all of the signatures, try to compile the transaction
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if (nState == POOL_STATE_SIGNING && IsSignaturesComplete()) {
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LogPrint("privatesend", "CPrivateSendServer::CheckPool -- SIGNING\n");
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CommitFinalTransaction(connman);
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return;
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}
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}
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void CPrivateSendServer::CreateFinalTransaction(CConnman& connman)
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{
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LogPrint("privatesend", "CPrivateSendServer::CreateFinalTransaction -- FINALIZE TRANSACTIONS\n");
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CMutableTransaction txNew;
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// make our new transaction
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for (int i = 0; i < GetEntriesCount(); i++) {
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for (const auto& txout : vecEntries[i].vecTxOut)
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txNew.vout.push_back(txout);
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for (const auto& txdsin : vecEntries[i].vecTxDSIn)
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txNew.vin.push_back(txdsin);
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}
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sort(txNew.vin.begin(), txNew.vin.end(), CompareInputBIP69());
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sort(txNew.vout.begin(), txNew.vout.end(), CompareOutputBIP69());
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finalMutableTransaction = txNew;
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LogPrint("privatesend", "CPrivateSendServer::CreateFinalTransaction -- finalMutableTransaction=%s", txNew.ToString());
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// request signatures from clients
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RelayFinalTransaction(finalMutableTransaction, connman);
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SetState(POOL_STATE_SIGNING);
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}
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void CPrivateSendServer::CommitFinalTransaction(CConnman& connman)
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{
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if (!fMasternodeMode) return; // check and relay final tx only on masternode
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CTransactionRef finalTransaction = MakeTransactionRef(finalMutableTransaction);
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uint256 hashTx = finalTransaction->GetHash();
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LogPrint("privatesend", "CPrivateSendServer::CommitFinalTransaction -- finalTransaction=%s", finalTransaction->ToString());
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{
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// See if the transaction is valid
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TRY_LOCK(cs_main, lockMain);
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CValidationState validationState;
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mempool.PrioritiseTransaction(hashTx, hashTx.ToString(), 1000, 0.1 * COIN);
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if (!lockMain || !AcceptToMemoryPool(mempool, validationState, finalTransaction, false, NULL, false, maxTxFee, true)) {
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LogPrintf("CPrivateSendServer::CommitFinalTransaction -- AcceptToMemoryPool() error: Transaction not valid\n");
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SetNull();
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// not much we can do in this case, just notify clients
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RelayCompletedTransaction(ERR_INVALID_TX, connman);
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return;
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}
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}
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LogPrintf("CPrivateSendServer::CommitFinalTransaction -- CREATING DSTX\n");
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// create and sign masternode dstx transaction
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if (!CPrivateSend::GetDSTX(hashTx)) {
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CPrivateSendBroadcastTx dstxNew(finalTransaction, activeMasternodeInfo.outpoint, GetAdjustedTime());
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dstxNew.Sign();
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CPrivateSend::AddDSTX(dstxNew);
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}
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LogPrintf("CPrivateSendServer::CommitFinalTransaction -- TRANSMITTING DSTX\n");
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CInv inv(MSG_DSTX, hashTx);
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connman.RelayInv(inv);
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// Tell the clients it was successful
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RelayCompletedTransaction(MSG_SUCCESS, connman);
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// Randomly charge clients
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ChargeRandomFees(connman);
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// Reset
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LogPrint("privatesend", "CPrivateSendServer::CommitFinalTransaction -- COMPLETED -- RESETTING\n");
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SetNull();
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}
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//
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// Charge clients a fee if they're abusive
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//
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// Why bother? PrivateSend uses collateral to ensure abuse to the process is kept to a minimum.
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// The submission and signing stages are completely separate. In the cases where
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// a client submits a transaction then refused to sign, there must be a cost. Otherwise they
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// would be able to do this over and over again and bring the mixing to a halt.
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//
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// How does this work? Messages to Masternodes come in via NetMsgType::DSVIN, these require a valid collateral
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// transaction for the client to be able to enter the pool. This transaction is kept by the Masternode
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// until the transaction is either complete or fails.
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//
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void CPrivateSendServer::ChargeFees(CConnman& connman)
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{
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if (!fMasternodeMode) return;
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//we don't need to charge collateral for every offence.
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if (GetRandInt(100) > 33) return;
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std::vector<CTransactionRef> vecOffendersCollaterals;
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if (nState == POOL_STATE_ACCEPTING_ENTRIES) {
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for (const auto& txCollateral : vecSessionCollaterals) {
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bool fFound = false;
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for (const auto& entry : vecEntries)
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if (*entry.txCollateral == *txCollateral)
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fFound = true;
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// This queue entry didn't send us the promised transaction
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if (!fFound) {
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LogPrintf("CPrivateSendServer::ChargeFees -- found uncooperative node (didn't send transaction), found offence\n");
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vecOffendersCollaterals.push_back(txCollateral);
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}
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}
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}
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if (nState == POOL_STATE_SIGNING) {
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// who didn't sign?
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for (const auto& entry : vecEntries) {
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for (const auto& txdsin : entry.vecTxDSIn) {
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if (!txdsin.fHasSig) {
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LogPrintf("CPrivateSendServer::ChargeFees -- found uncooperative node (didn't sign), found offence\n");
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vecOffendersCollaterals.push_back(entry.txCollateral);
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}
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}
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}
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}
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// no offences found
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if (vecOffendersCollaterals.empty()) return;
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//mostly offending? Charge sometimes
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if ((int)vecOffendersCollaterals.size() >= Params().PoolMaxTransactions() - 1 && GetRandInt(100) > 33) return;
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//everyone is an offender? That's not right
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if ((int)vecOffendersCollaterals.size() >= Params().PoolMaxTransactions()) return;
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//charge one of the offenders randomly
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std::random_shuffle(vecOffendersCollaterals.begin(), vecOffendersCollaterals.end());
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if (nState == POOL_STATE_ACCEPTING_ENTRIES || nState == POOL_STATE_SIGNING) {
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LogPrintf("CPrivateSendServer::ChargeFees -- found uncooperative node (didn't %s transaction), charging fees: %s",
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(nState == POOL_STATE_SIGNING) ? "sign" : "send", vecOffendersCollaterals[0]->ToString());
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LOCK(cs_main);
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CValidationState state;
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if (!AcceptToMemoryPool(mempool, state, vecOffendersCollaterals[0], false, NULL, false, maxTxFee)) {
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// should never really happen
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LogPrintf("CPrivateSendServer::ChargeFees -- ERROR: AcceptToMemoryPool failed!\n");
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} else {
|
|
connman.RelayTransaction(*vecOffendersCollaterals[0]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
Charge the collateral randomly.
|
|
Mixing is completely free, to pay miners we randomly pay the collateral of users.
|
|
|
|
Collateral Fee Charges:
|
|
|
|
Being that mixing has "no fees" we need to have some kind of cost associated
|
|
with using it to stop abuse. Otherwise it could serve as an attack vector and
|
|
allow endless transaction that would bloat Dash and make it unusable. To
|
|
stop these kinds of attacks 1 in 10 successful transactions are charged. This
|
|
adds up to a cost of 0.001DRK per transaction on average.
|
|
*/
|
|
void CPrivateSendServer::ChargeRandomFees(CConnman& connman)
|
|
{
|
|
if (!fMasternodeMode) return;
|
|
|
|
LOCK(cs_main);
|
|
|
|
for (const auto& txCollateral : vecSessionCollaterals) {
|
|
if (GetRandInt(100) > 10) return;
|
|
LogPrintf("CPrivateSendServer::ChargeRandomFees -- charging random fees, txCollateral=%s", txCollateral->ToString());
|
|
|
|
CValidationState state;
|
|
if (!AcceptToMemoryPool(mempool, state, txCollateral, false, NULL, false, maxTxFee)) {
|
|
// should never really happen
|
|
LogPrintf("CPrivateSendServer::ChargeRandomFees -- ERROR: AcceptToMemoryPool failed!\n");
|
|
} else {
|
|
connman.RelayTransaction(*txCollateral);
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Check for various timeouts (queue objects, mixing, etc)
|
|
//
|
|
void CPrivateSendServer::CheckTimeout(CConnman& connman)
|
|
{
|
|
if (!fMasternodeMode) return;
|
|
|
|
CheckQueue();
|
|
|
|
int nTimeout = (nState == POOL_STATE_SIGNING) ? PRIVATESEND_SIGNING_TIMEOUT : PRIVATESEND_QUEUE_TIMEOUT;
|
|
bool fTimeout = GetTime() - nTimeLastSuccessfulStep >= nTimeout;
|
|
|
|
if (nState != POOL_STATE_IDLE && fTimeout) {
|
|
LogPrint("privatesend", "CPrivateSendServer::CheckTimeout -- %s timed out (%ds) -- resetting\n",
|
|
(nState == POOL_STATE_SIGNING) ? "Signing" : "Session", nTimeout);
|
|
ChargeFees(connman);
|
|
SetNull();
|
|
}
|
|
}
|
|
|
|
/*
|
|
Check to see if we're ready for submissions from clients
|
|
After receiving multiple dsa messages, the queue will switch to "accepting entries"
|
|
which is the active state right before merging the transaction
|
|
*/
|
|
void CPrivateSendServer::CheckForCompleteQueue(CConnman& connman)
|
|
{
|
|
if (!fMasternodeMode) return;
|
|
|
|
if (nState == POOL_STATE_QUEUE && IsSessionReady()) {
|
|
SetState(POOL_STATE_ACCEPTING_ENTRIES);
|
|
|
|
CPrivateSendQueue dsq(nSessionDenom, activeMasternodeInfo.outpoint, GetAdjustedTime(), true);
|
|
LogPrint("privatesend", "CPrivateSendServer::CheckForCompleteQueue -- queue is ready, signing and relaying (%s)\n", dsq.ToString());
|
|
dsq.Sign();
|
|
dsq.Relay(connman);
|
|
}
|
|
}
|
|
|
|
// Check to make sure a given input matches an input in the pool and its scriptSig is valid
|
|
bool CPrivateSendServer::IsInputScriptSigValid(const CTxIn& txin)
|
|
{
|
|
CMutableTransaction txNew;
|
|
txNew.vin.clear();
|
|
txNew.vout.clear();
|
|
|
|
int i = 0;
|
|
int nTxInIndex = -1;
|
|
CScript sigPubKey = CScript();
|
|
|
|
for (const auto& entry : vecEntries) {
|
|
for (const auto& txout : entry.vecTxOut)
|
|
txNew.vout.push_back(txout);
|
|
|
|
for (const auto& txdsin : entry.vecTxDSIn) {
|
|
txNew.vin.push_back(txdsin);
|
|
|
|
if (txdsin.prevout == txin.prevout) {
|
|
nTxInIndex = i;
|
|
sigPubKey = txdsin.prevPubKey;
|
|
}
|
|
i++;
|
|
}
|
|
}
|
|
|
|
if (nTxInIndex >= 0) { //might have to do this one input at a time?
|
|
txNew.vin[nTxInIndex].scriptSig = txin.scriptSig;
|
|
LogPrint("privatesend", "CPrivateSendServer::IsInputScriptSigValid -- verifying scriptSig %s\n", ScriptToAsmStr(txin.scriptSig).substr(0, 24));
|
|
if (!VerifyScript(txNew.vin[nTxInIndex].scriptSig, sigPubKey, SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC, MutableTransactionSignatureChecker(&txNew, nTxInIndex))) {
|
|
LogPrint("privatesend", "CPrivateSendServer::IsInputScriptSigValid -- VerifyScript() failed on input %d\n", nTxInIndex);
|
|
return false;
|
|
}
|
|
} else {
|
|
LogPrint("privatesend", "CPrivateSendServer::IsInputScriptSigValid -- Failed to find matching input in pool, %s\n", txin.ToString());
|
|
return false;
|
|
}
|
|
|
|
LogPrint("privatesend", "CPrivateSendServer::IsInputScriptSigValid -- Successfully validated input and scriptSig\n");
|
|
return true;
|
|
}
|
|
|
|
//
|
|
// Add a clients transaction to the pool
|
|
//
|
|
bool CPrivateSendServer::AddEntry(const CPrivateSendEntry& entryNew, PoolMessage& nMessageIDRet)
|
|
{
|
|
if (!fMasternodeMode) return false;
|
|
|
|
for (const auto& txin : entryNew.vecTxDSIn) {
|
|
if (txin.prevout.IsNull()) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddEntry -- input not valid!\n");
|
|
nMessageIDRet = ERR_INVALID_INPUT;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (!CPrivateSend::IsCollateralValid(*entryNew.txCollateral)) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddEntry -- collateral not valid!\n");
|
|
nMessageIDRet = ERR_INVALID_COLLATERAL;
|
|
return false;
|
|
}
|
|
|
|
if (GetEntriesCount() >= CPrivateSend::GetMaxPoolTransactions()) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddEntry -- entries is full!\n");
|
|
nMessageIDRet = ERR_ENTRIES_FULL;
|
|
return false;
|
|
}
|
|
|
|
for (const auto& txin : entryNew.vecTxDSIn) {
|
|
LogPrint("privatesend", "looking for txin -- %s\n", txin.ToString());
|
|
for (const auto& entry : vecEntries) {
|
|
for (const auto& txdsin : entry.vecTxDSIn) {
|
|
if (txdsin.prevout == txin.prevout) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddEntry -- found in txin\n");
|
|
nMessageIDRet = ERR_ALREADY_HAVE;
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
vecEntries.push_back(entryNew);
|
|
|
|
LogPrint("privatesend", "CPrivateSendServer::AddEntry -- adding entry\n");
|
|
nMessageIDRet = MSG_ENTRIES_ADDED;
|
|
nTimeLastSuccessfulStep = GetTime();
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPrivateSendServer::AddScriptSig(const CTxIn& txinNew)
|
|
{
|
|
LogPrint("privatesend", "CPrivateSendServer::AddScriptSig -- scriptSig=%s\n", ScriptToAsmStr(txinNew.scriptSig).substr(0, 24));
|
|
|
|
for (const auto& entry : vecEntries) {
|
|
for (const auto& txdsin : entry.vecTxDSIn) {
|
|
if (txdsin.scriptSig == txinNew.scriptSig) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddScriptSig -- already exists\n");
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!IsInputScriptSigValid(txinNew)) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddScriptSig -- Invalid scriptSig\n");
|
|
return false;
|
|
}
|
|
|
|
LogPrint("privatesend", "CPrivateSendServer::AddScriptSig -- scriptSig=%s new\n", ScriptToAsmStr(txinNew.scriptSig).substr(0, 24));
|
|
|
|
for (auto& txin : finalMutableTransaction.vin) {
|
|
if (txin.prevout == txinNew.prevout && txin.nSequence == txinNew.nSequence) {
|
|
txin.scriptSig = txinNew.scriptSig;
|
|
LogPrint("privatesend", "CPrivateSendServer::AddScriptSig -- adding to finalMutableTransaction, scriptSig=%s\n", ScriptToAsmStr(txinNew.scriptSig).substr(0, 24));
|
|
}
|
|
}
|
|
for (int i = 0; i < GetEntriesCount(); i++) {
|
|
if (vecEntries[i].AddScriptSig(txinNew)) {
|
|
LogPrint("privatesend", "CPrivateSendServer::AddScriptSig -- adding to entries, scriptSig=%s\n", ScriptToAsmStr(txinNew.scriptSig).substr(0, 24));
|
|
return true;
|
|
}
|
|
}
|
|
|
|
LogPrintf("CPrivateSendServer::AddScriptSig -- Couldn't set sig!\n");
|
|
return false;
|
|
}
|
|
|
|
// Check to make sure everything is signed
|
|
bool CPrivateSendServer::IsSignaturesComplete()
|
|
{
|
|
for (const auto& entry : vecEntries)
|
|
for (const auto& txdsin : entry.vecTxDSIn)
|
|
if (!txdsin.fHasSig) return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPrivateSendServer::IsOutputsCompatibleWithSessionDenom(const std::vector<CTxOut>& vecTxOut)
|
|
{
|
|
if (CPrivateSend::GetDenominations(vecTxOut) == 0) return false;
|
|
|
|
for (const auto& entry : vecEntries) {
|
|
LogPrintf("CPrivateSendServer::IsOutputsCompatibleWithSessionDenom -- vecTxOut denom %d, entry.vecTxOut denom %d\n",
|
|
CPrivateSend::GetDenominations(vecTxOut), CPrivateSend::GetDenominations(entry.vecTxOut));
|
|
if (CPrivateSend::GetDenominations(vecTxOut) != CPrivateSend::GetDenominations(entry.vecTxOut)) return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPrivateSendServer::IsAcceptableDSA(const CPrivateSendAccept& dsa, PoolMessage& nMessageIDRet)
|
|
{
|
|
if (!fMasternodeMode) return false;
|
|
|
|
// is denom even smth legit?
|
|
std::vector<int> vecBits;
|
|
if (!CPrivateSend::GetDenominationsBits(dsa.nDenom, vecBits)) {
|
|
LogPrint("privatesend", "CPrivateSendServer::%s -- denom not valid!\n", __func__);
|
|
nMessageIDRet = ERR_DENOM;
|
|
return false;
|
|
}
|
|
|
|
// check collateral
|
|
if (!fUnitTest && !CPrivateSend::IsCollateralValid(dsa.txCollateral)) {
|
|
LogPrint("privatesend", "CPrivateSendServer::%s -- collateral not valid!\n", __func__);
|
|
nMessageIDRet = ERR_INVALID_COLLATERAL;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPrivateSendServer::CreateNewSession(const CPrivateSendAccept& dsa, PoolMessage& nMessageIDRet, CConnman& connman)
|
|
{
|
|
if (!fMasternodeMode || nSessionID != 0) return false;
|
|
|
|
// new session can only be started in idle mode
|
|
if (nState != POOL_STATE_IDLE) {
|
|
nMessageIDRet = ERR_MODE;
|
|
LogPrintf("CPrivateSendServer::CreateNewSession -- incompatible mode: nState=%d\n", nState);
|
|
return false;
|
|
}
|
|
|
|
if (!IsAcceptableDSA(dsa, nMessageIDRet)) {
|
|
return false;
|
|
}
|
|
|
|
// start new session
|
|
nMessageIDRet = MSG_NOERR;
|
|
nSessionID = GetRandInt(999999) + 1;
|
|
nSessionDenom = dsa.nDenom;
|
|
|
|
SetState(POOL_STATE_QUEUE);
|
|
nTimeLastSuccessfulStep = GetTime();
|
|
|
|
if (!fUnitTest) {
|
|
//broadcast that I'm accepting entries, only if it's the first entry through
|
|
CPrivateSendQueue dsq(nSessionDenom, activeMasternodeInfo.outpoint, GetAdjustedTime(), false);
|
|
LogPrint("privatesend", "CPrivateSendServer::CreateNewSession -- signing and relaying new queue: %s\n", dsq.ToString());
|
|
dsq.Sign();
|
|
dsq.Relay(connman);
|
|
vecPrivateSendQueue.push_back(dsq);
|
|
}
|
|
|
|
vecSessionCollaterals.push_back(MakeTransactionRef(dsa.txCollateral));
|
|
LogPrintf("CPrivateSendServer::CreateNewSession -- new session created, nSessionID: %d nSessionDenom: %d (%s) vecSessionCollaterals.size(): %d\n",
|
|
nSessionID, nSessionDenom, CPrivateSend::GetDenominationsToString(nSessionDenom), vecSessionCollaterals.size());
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CPrivateSendServer::AddUserToExistingSession(const CPrivateSendAccept& dsa, PoolMessage& nMessageIDRet)
|
|
{
|
|
if (!fMasternodeMode || nSessionID == 0 || IsSessionReady()) return false;
|
|
|
|
if (!IsAcceptableDSA(dsa, nMessageIDRet)) {
|
|
return false;
|
|
}
|
|
|
|
// we only add new users to an existing session when we are in queue mode
|
|
if (nState != POOL_STATE_QUEUE) {
|
|
nMessageIDRet = ERR_MODE;
|
|
LogPrintf("CPrivateSendServer::AddUserToExistingSession -- incompatible mode: nState=%d\n", nState);
|
|
return false;
|
|
}
|
|
|
|
if (dsa.nDenom != nSessionDenom) {
|
|
LogPrintf("CPrivateSendServer::AddUserToExistingSession -- incompatible denom %d (%s) != nSessionDenom %d (%s)\n",
|
|
dsa.nDenom, CPrivateSend::GetDenominationsToString(dsa.nDenom), nSessionDenom, CPrivateSend::GetDenominationsToString(nSessionDenom));
|
|
nMessageIDRet = ERR_DENOM;
|
|
return false;
|
|
}
|
|
|
|
// count new user as accepted to an existing session
|
|
|
|
nMessageIDRet = MSG_NOERR;
|
|
nTimeLastSuccessfulStep = GetTime();
|
|
vecSessionCollaterals.push_back(MakeTransactionRef(dsa.txCollateral));
|
|
|
|
LogPrintf("CPrivateSendServer::AddUserToExistingSession -- new user accepted, nSessionID: %d nSessionDenom: %d (%s) vecSessionCollaterals.size(): %d\n",
|
|
nSessionID, nSessionDenom, CPrivateSend::GetDenominationsToString(nSessionDenom), vecSessionCollaterals.size());
|
|
|
|
return true;
|
|
}
|
|
|
|
void CPrivateSendServer::RelayFinalTransaction(const CTransaction& txFinal, CConnman& connman)
|
|
{
|
|
LogPrint("privatesend", "CPrivateSendServer::%s -- nSessionID: %d nSessionDenom: %d (%s)\n",
|
|
__func__, nSessionID, nSessionDenom, CPrivateSend::GetDenominationsToString(nSessionDenom));
|
|
|
|
// final mixing tx with empty signatures should be relayed to mixing participants only
|
|
for (const auto entry : vecEntries) {
|
|
bool fOk = connman.ForNode(entry.addr, [&txFinal, &connman, this](CNode* pnode) {
|
|
CNetMsgMaker msgMaker(pnode->GetSendVersion());
|
|
connman.PushMessage(pnode, msgMaker.Make(NetMsgType::DSFINALTX, nSessionID, txFinal));
|
|
return true;
|
|
});
|
|
if (!fOk) {
|
|
// no such node? maybe this client disconnected or our own connection went down
|
|
RelayStatus(STATUS_REJECTED, connman);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void CPrivateSendServer::PushStatus(CNode* pnode, PoolStatusUpdate nStatusUpdate, PoolMessage nMessageID, CConnman& connman)
|
|
{
|
|
if (!pnode) return;
|
|
CNetMsgMaker msgMaker(pnode->GetSendVersion());
|
|
connman.PushMessage(pnode, msgMaker.Make(NetMsgType::DSSTATUSUPDATE, nSessionID, (int)nState, (int)vecEntries.size(), (int)nStatusUpdate, (int)nMessageID));
|
|
}
|
|
|
|
void CPrivateSendServer::RelayStatus(PoolStatusUpdate nStatusUpdate, CConnman& connman, PoolMessage nMessageID)
|
|
{
|
|
unsigned int nDisconnected{};
|
|
// status updates should be relayed to mixing participants only
|
|
for (const auto entry : vecEntries) {
|
|
// make sure everyone is still connected
|
|
bool fOk = connman.ForNode(entry.addr, [&nStatusUpdate, &nMessageID, &connman, this](CNode* pnode) {
|
|
PushStatus(pnode, nStatusUpdate, nMessageID, connman);
|
|
return true;
|
|
});
|
|
if (!fOk) {
|
|
// no such node? maybe this client disconnected or our own connection went down
|
|
++nDisconnected;
|
|
}
|
|
}
|
|
if (nDisconnected == 0) return; // all is clear
|
|
|
|
// smth went wrong
|
|
LogPrintf("CPrivateSendServer::%s -- can't continue, %llu client(s) disconnected, nSessionID: %d nSessionDenom: %d (%s)\n",
|
|
__func__, nDisconnected, nSessionID, nSessionDenom, CPrivateSend::GetDenominationsToString(nSessionDenom));
|
|
|
|
// notify everyone else that this session should be terminated
|
|
for (const auto& entry : vecEntries) {
|
|
connman.ForNode(entry.addr, [&connman, this](CNode* pnode) {
|
|
PushStatus(pnode, STATUS_REJECTED, MSG_NOERR, connman);
|
|
return true;
|
|
});
|
|
}
|
|
|
|
if (nDisconnected == vecEntries.size()) {
|
|
// all clients disconnected, there is probably some issues with our own connection
|
|
// do not charge any fees, just reset the pool
|
|
SetNull();
|
|
}
|
|
}
|
|
|
|
void CPrivateSendServer::RelayCompletedTransaction(PoolMessage nMessageID, CConnman& connman)
|
|
{
|
|
LogPrint("privatesend", "CPrivateSendServer::%s -- nSessionID: %d nSessionDenom: %d (%s)\n",
|
|
__func__, nSessionID, nSessionDenom, CPrivateSend::GetDenominationsToString(nSessionDenom));
|
|
|
|
// final mixing tx with empty signatures should be relayed to mixing participants only
|
|
for (const auto& entry : vecEntries) {
|
|
bool fOk = connman.ForNode(entry.addr, [&nMessageID, &connman, this](CNode* pnode) {
|
|
CNetMsgMaker msgMaker(pnode->GetSendVersion());
|
|
connman.PushMessage(pnode, msgMaker.Make(NetMsgType::DSCOMPLETE, nSessionID, (int)nMessageID));
|
|
return true;
|
|
});
|
|
if (!fOk) {
|
|
// no such node? maybe client disconnected or our own connection went down
|
|
RelayStatus(STATUS_REJECTED, connman);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void CPrivateSendServer::SetState(PoolState nStateNew)
|
|
{
|
|
if (!fMasternodeMode) return;
|
|
|
|
if (nStateNew == POOL_STATE_ERROR || nStateNew == POOL_STATE_SUCCESS) {
|
|
LogPrint("privatesend", "CPrivateSendServer::SetState -- Can't set state to ERROR or SUCCESS as a Masternode. \n");
|
|
return;
|
|
}
|
|
|
|
LogPrintf("CPrivateSendServer::SetState -- nState: %d, nStateNew: %d\n", nState, nStateNew);
|
|
nState = nStateNew;
|
|
}
|
|
|
|
void CPrivateSendServer::DoMaintenance(CConnman& connman)
|
|
{
|
|
if (fLiteMode) return; // disable all Dash specific functionality
|
|
if (!fMasternodeMode) return; // only run on masternodes
|
|
|
|
if (!masternodeSync.IsBlockchainSynced() || ShutdownRequested())
|
|
return;
|
|
|
|
privateSendServer.CheckTimeout(connman);
|
|
privateSendServer.CheckForCompleteQueue(connman);
|
|
}
|