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0534632d2b
dash/src/masternode.cpp
UdjinM6 0534632d2b add cs_main lock to GetCollateralAge
2016-09-12 21:06:59 +03:00

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// Copyright (c) 2014-2016 The Dash Core developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "consensus/validation.h"
#include "activemasternode.h"
#include "darksend.h"
#include "init.h"
#include "masternode.h"
#include "masternode-payments.h"
#include "masternode-sync.h"
#include "masternodeman.h"
#include "governance.h"
#include "util.h"
#include "sync.h"
#include "addrman.h"
#include <boost/lexical_cast.hpp>
// keep track of the scanning errors I've seen
map<uint256, int> mapSeenMasternodeScanningErrors;
CMasternode::CMasternode()
{
LOCK(cs);
vin = CTxIn();
addr = CService();
pubkey = CPubKey();
pubkey2 = CPubKey();
vchSig = std::vector<unsigned char>();
activeState = MASTERNODE_ENABLED;
sigTime = GetAdjustedTime();
lastPing = CMasternodePing();
nTimeLastPaid = 0;
nBlockLastPaid = 0;
nCacheCollateralBlock = 0;
unitTest = false;
allowFreeTx = true;
protocolVersion = PROTOCOL_VERSION;
nLastDsq = 0;
nScanningErrorCount = 0;
nLastScanningErrorBlockHeight = 0;
lastTimeChecked = 0;
}
CMasternode::CMasternode(const CMasternode& other)
{
LOCK(cs);
vin = other.vin;
addr = other.addr;
pubkey = other.pubkey;
pubkey2 = other.pubkey2;
vchSig = other.vchSig;
activeState = other.activeState;
sigTime = other.sigTime;
lastPing = other.lastPing;
nTimeLastPaid = other.nTimeLastPaid;
nBlockLastPaid = other.nBlockLastPaid;
nCacheCollateralBlock = other.nCacheCollateralBlock;
unitTest = other.unitTest;
allowFreeTx = other.allowFreeTx;
protocolVersion = other.protocolVersion;
nLastDsq = other.nLastDsq;
nScanningErrorCount = other.nScanningErrorCount;
nLastScanningErrorBlockHeight = other.nLastScanningErrorBlockHeight;
lastTimeChecked = 0;
}
CMasternode::CMasternode(const CMasternodeBroadcast& mnb)
{
LOCK(cs);
vin = mnb.vin;
addr = mnb.addr;
pubkey = mnb.pubkey;
pubkey2 = mnb.pubkey2;
vchSig = mnb.vchSig;
activeState = MASTERNODE_ENABLED;
sigTime = mnb.sigTime;
lastPing = mnb.lastPing;
nTimeLastPaid = 0;
nBlockLastPaid = 0;
nCacheCollateralBlock = 0;
unitTest = false;
allowFreeTx = true;
protocolVersion = mnb.protocolVersion;
nLastDsq = mnb.nLastDsq;
nScanningErrorCount = 0;
nLastScanningErrorBlockHeight = 0;
lastTimeChecked = 0;
}
//
// When a new masternode broadcast is sent, update our information
//
bool CMasternode::UpdateFromNewBroadcast(CMasternodeBroadcast& mnb)
{
if(mnb.sigTime > sigTime) {
pubkey2 = mnb.pubkey2;
sigTime = mnb.sigTime;
vchSig = mnb.vchSig;
protocolVersion = mnb.protocolVersion;
addr = mnb.addr;
lastTimeChecked = 0;
int nDos = 0;
if(mnb.lastPing == CMasternodePing() || (mnb.lastPing != CMasternodePing() && mnb.lastPing.CheckAndUpdate(nDos, false))) {
lastPing = mnb.lastPing;
mnodeman.mapSeenMasternodePing.insert(make_pair(lastPing.GetHash(), lastPing));
}
return true;
}
return false;
}
//
// Deterministically calculate a given "score" for a Masternode depending on how close it's hash is to
// the proof of work for that block. The further away they are the better, the furthest will win the election
// and get paid this block
//
uint256 CMasternode::CalculateScore(int mod, int64_t nBlockHeight)
{
{
LOCK(cs_main);
if(chainActive.Tip() == NULL) return uint256();
}
uint256 hash = uint256();
uint256 aux = ArithToUint256(UintToArith256(vin.prevout.hash) + vin.prevout.n);
if(!GetBlockHash(hash, nBlockHeight)) {
LogPrintf("CMasternode::CalculateScore -- ERROR: GetBlockHash() failed at nBlockHeight %d\n", nBlockHeight);
return uint256();
}
CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
ss << hash;
arith_uint256 hash2 = UintToArith256(ss.GetHash());
CHashWriter ss2(SER_GETHASH, PROTOCOL_VERSION);
ss2 << hash;
ss2 << aux;
arith_uint256 hash3 = UintToArith256(ss2.GetHash());
arith_uint256 r = (hash3 > hash2 ? hash3 - hash2 : hash2 - hash3);
return ArithToUint256(r);
}
void CMasternode::Check(bool forceCheck)
{
if(ShutdownRequested()) return;
if(!forceCheck && (GetTime() - lastTimeChecked < MASTERNODE_CHECK_SECONDS)) return;
lastTimeChecked = GetTime();
//once spent, stop doing the checks
if(activeState == MASTERNODE_VIN_SPENT) return;
// If there are no pings for quite a long time ...
if(!IsPingedWithin(MASTERNODE_REMOVAL_SECONDS)
// or doesn't meet payments requirements ...
|| protocolVersion < mnpayments.GetMinMasternodePaymentsProto()
// or it's our own node and we just updated it to the new protocol but we are still waiting for activation -
|| (pubkey2 == activeMasternode.pubKeyMasternode && protocolVersion < PROTOCOL_VERSION)) {
// remove it from the list
activeState = MASTERNODE_REMOVE;
// RESCAN AFFECTED VOTES
FlagGovernanceItemsAsDirty();
return;
}
if(!IsPingedWithin(MASTERNODE_EXPIRATION_SECONDS)){
activeState = MASTERNODE_EXPIRED;
// RESCAN AFFECTED VOTES
FlagGovernanceItemsAsDirty();
return;
}
if(lastPing.sigTime - sigTime < MASTERNODE_MIN_MNP_SECONDS){
activeState = MASTERNODE_PRE_ENABLED;
return;
}
if(!unitTest){
CValidationState state;
CMutableTransaction tx = CMutableTransaction();
CTxOut txout = CTxOut(999.99*COIN, mnodeman.dummyScriptPubkey);
tx.vin.push_back(vin);
tx.vout.push_back(txout);
{
TRY_LOCK(cs_main, lockMain);
if(!lockMain) return;
if(!AcceptToMemoryPool(mempool, state, CTransaction(tx), false, NULL, false, true, true)){
activeState = MASTERNODE_VIN_SPENT;
return;
}
}
}
activeState = MASTERNODE_ENABLED; // OK
}
int CMasternode::GetCollateralAge()
{
int nHeight;
{
TRY_LOCK(cs_main, lockMain);
if(!lockMain || !chainActive.Tip()) return -1;
nHeight = chainActive.Height();
}
if (nCacheCollateralBlock == 0) {
int nInputAge = GetInputAge(vin);
if(nInputAge > 0) {
nCacheCollateralBlock = nHeight - nInputAge;
} else {
return nInputAge;
}
}
return nHeight - nCacheCollateralBlock;
}
void CMasternode::UpdateLastPaid(const CBlockIndex *pindex, int nMaxBlocksToScanBack)
{
if(!pindex) return;
const CBlockIndex *BlockReading = pindex;
CScript mnpayee = GetScriptForDestination(pubkey.GetID());
// LogPrint("masternode", "CMasternode::UpdateLastPaidBlock -- searching for block with payment to %s\n", vin.prevout.ToStringShort());
LOCK(cs_mapMasternodeBlocks);
for (int i = 0; BlockReading && BlockReading->nHeight > nBlockLastPaid && i < nMaxBlocksToScanBack; i++) {
if(mnpayments.mapMasternodeBlocks.count(BlockReading->nHeight) &&
mnpayments.mapMasternodeBlocks[BlockReading->nHeight].HasPayeeWithVotes(mnpayee, 2))
{
CBlock block;
if(!ReadBlockFromDisk(block, BlockReading, Params().GetConsensus())) // shouldn't really happen
continue;
CAmount nMasternodePayment = GetMasternodePayment(BlockReading->nHeight, block.vtx[0].GetValueOut());
BOOST_FOREACH(CTxOut txout, block.vtx[0].vout)
if(mnpayee == txout.scriptPubKey && nMasternodePayment == txout.nValue) {
nBlockLastPaid = BlockReading->nHeight;
nTimeLastPaid = BlockReading->nTime;
LogPrint("masternode", "CMasternode::UpdateLastPaidBlock -- searching for block with payment to %s -- found new %d\n", vin.prevout.ToStringShort(), nBlockLastPaid);
return;
}
}
if (BlockReading->pprev == NULL) { assert(BlockReading); break; }
BlockReading = BlockReading->pprev;
}
// Last payment for this masternode wasn't found in latest mnpayments blocks
// or it was found in mnpayments blocks but wasn't found in the blockchain.
// LogPrint("masternode", "CMasternode::UpdateLastPaidBlock -- searching for block with payment to %s -- keeping old %d\n", vin.prevout.ToStringShort(), nBlockLastPaid);
}
CMasternodeBroadcast::CMasternodeBroadcast()
{
vin = CTxIn();
addr = CService();
pubkey = CPubKey();
pubkey2 = CPubKey();
vchSig = std::vector<unsigned char>();
activeState = MASTERNODE_ENABLED;
sigTime = GetAdjustedTime();
lastPing = CMasternodePing();
nTimeLastPaid = 0;
nBlockLastPaid = 0;
nCacheCollateralBlock = 0;
unitTest = false;
allowFreeTx = true;
protocolVersion = PROTOCOL_VERSION;
nLastDsq = 0;
nScanningErrorCount = 0;
nLastScanningErrorBlockHeight = 0;
}
CMasternodeBroadcast::CMasternodeBroadcast(CService newAddr, CTxIn newVin, CPubKey newPubkey, CPubKey newPubkey2, int protocolVersionIn)
{
vin = newVin;
addr = newAddr;
pubkey = newPubkey;
pubkey2 = newPubkey2;
vchSig = std::vector<unsigned char>();
activeState = MASTERNODE_ENABLED;
sigTime = GetAdjustedTime();
lastPing = CMasternodePing();
nTimeLastPaid = 0;
nBlockLastPaid = 0;
nCacheCollateralBlock = 0;
unitTest = false;
allowFreeTx = true;
protocolVersion = protocolVersionIn;
nLastDsq = 0;
nScanningErrorCount = 0;
nLastScanningErrorBlockHeight = 0;
}
CMasternodeBroadcast::CMasternodeBroadcast(const CMasternode& mn)
{
vin = mn.vin;
addr = mn.addr;
pubkey = mn.pubkey;
pubkey2 = mn.pubkey2;
vchSig = mn.vchSig;
activeState = mn.activeState;
sigTime = mn.sigTime;
lastPing = mn.lastPing;
nTimeLastPaid = mn.nTimeLastPaid;
nBlockLastPaid = mn.nBlockLastPaid;
nCacheCollateralBlock = mn.nCacheCollateralBlock;
unitTest = mn.unitTest;
allowFreeTx = mn.allowFreeTx;
protocolVersion = mn.protocolVersion;
nLastDsq = mn.nLastDsq;
nScanningErrorCount = mn.nScanningErrorCount;
nLastScanningErrorBlockHeight = mn.nLastScanningErrorBlockHeight;
}
bool CMasternodeBroadcast::Create(std::string strService, std::string strKeyMasternode, std::string strTxHash, std::string strOutputIndex, std::string& strErrorRet, CMasternodeBroadcast &mnbRet, bool fOffline)
{
CTxIn txin;
CPubKey pubKeyCollateral;
CKey keyCollateral;
CPubKey pubKeyMasternodeNew;
CKey keyMasternodeNew;
//need correct blocks to send ping
if(!fOffline && !masternodeSync.IsBlockchainSynced()) {
strErrorRet = "Sync in progress. Must wait until sync is complete to start Masternode";
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
return false;
}
if(!darkSendSigner.GetKeysFromSecret(strKeyMasternode, keyMasternodeNew, pubKeyMasternodeNew)) {
strErrorRet = strprintf("Invalid masternode key %s", strKeyMasternode);
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
return false;
}
if(!pwalletMain->GetMasternodeVinAndKeys(txin, pubKeyCollateral, keyCollateral, strTxHash, strOutputIndex)) {
strErrorRet = strprintf("Could not allocate txin %s:%s for masternode %s", strTxHash, strOutputIndex, strService);
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
return false;
}
CService service = CService(strService);
int mainnetDefaultPort = Params(CBaseChainParams::MAIN).GetDefaultPort();
if(Params().NetworkIDString() == CBaseChainParams::MAIN) {
if(service.GetPort() != mainnetDefaultPort) {
strErrorRet = strprintf("Invalid port %u for masternode %s, only %d is supported on mainnet.", service.GetPort(), strService, mainnetDefaultPort);
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
return false;
}
} else if (service.GetPort() == mainnetDefaultPort) {
strErrorRet = strprintf("Invalid port %u for masternode %s, %d is the only supported on mainnet.", service.GetPort(), strService, mainnetDefaultPort);
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
return false;
}
return Create(txin, CService(strService), keyCollateral, pubKeyCollateral, keyMasternodeNew, pubKeyMasternodeNew, strErrorRet, mnbRet);
}
bool CMasternodeBroadcast::Create(CTxIn txin, CService service, CKey keyCollateral, CPubKey pubKeyCollateral, CKey keyMasternodeNew, CPubKey pubKeyMasternodeNew, std::string &strErrorRet, CMasternodeBroadcast &mnbRet)
{
// wait for reindex and/or import to finish
if (fImporting || fReindex) return false;
CMasternodePing mnp(txin);
if(!mnp.Sign(keyMasternodeNew, pubKeyMasternodeNew)) {
strErrorRet = strprintf("Failed to sign ping: %s", txin.ToString());
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
mnbRet = CMasternodeBroadcast();
return false;
}
mnbRet = CMasternodeBroadcast(service, txin, pubKeyCollateral, pubKeyMasternodeNew, PROTOCOL_VERSION);
mnbRet.lastPing = mnp;
if(!mnbRet.Sign(keyCollateral)) {
strErrorRet = strprintf("Failed to sign broadcast: %s", txin.ToString());
LogPrintf("CMasternodeBroadcast::Create -- %s\n", strErrorRet);
mnbRet = CMasternodeBroadcast();
return false;
}
return true;
}
bool CMasternodeBroadcast::CheckAndUpdate(int& nDos)
{
nDos = 0;
// make sure signature isn't in the future (past is OK)
if (sigTime > GetAdjustedTime() + 60 * 60) {
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - Signature rejected, too far into the future %s\n", vin.ToString());
nDos = 1;
return false;
}
// incorrect ping or its sigTime
if(lastPing == CMasternodePing() || !lastPing.CheckAndUpdate(nDos, false, true)) {
return false;
}
if(protocolVersion < mnpayments.GetMinMasternodePaymentsProto()) {
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - ignoring outdated Masternode %s protocol version %d\n", vin.ToString(), protocolVersion);
return false;
}
CScript pubkeyScript;
pubkeyScript = GetScriptForDestination(pubkey.GetID());
if(pubkeyScript.size() != 25) {
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - pubkey the wrong size\n");
nDos = 100;
return false;
}
CScript pubkeyScript2;
pubkeyScript2 = GetScriptForDestination(pubkey2.GetID());
if(pubkeyScript2.size() != 25) {
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - pubkey2 the wrong size\n");
nDos = 100;
return false;
}
if(!vin.scriptSig.empty()) {
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - Ignore Not Empty ScriptSig %s\n",vin.ToString());
return false;
}
if (!VerifySignature(nDos))
{
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - VerifySignature failed %s\n",vin.ToString());
return false;
}
int mainnetDefaultPort = Params(CBaseChainParams::MAIN).GetDefaultPort();
if(Params().NetworkIDString() == CBaseChainParams::MAIN) {
if(addr.GetPort() != mainnetDefaultPort) return false;
} else if(addr.GetPort() == mainnetDefaultPort) return false;
//search existing Masternode list, this is where we update existing Masternodes with new mnb broadcasts
CMasternode* pmn = mnodeman.Find(vin);
// no such masternode, nothing to update
if(pmn == NULL) return true;
// this broadcast is older or equal than the one that we already have - it's bad and should never happen
// unless someone is doing something fishy
// (mapSeenMasternodeBroadcast in CMasternodeMan::ProcessMessage should filter legit duplicates)
if(pmn->sigTime >= sigTime) {
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - Bad sigTime %d for Masternode %20s %105s (existing broadcast is at %d)\n",
sigTime, addr.ToString(), vin.ToString(), pmn->sigTime);
return false;
}
// masternode is not enabled yet/already, nothing to update
if(!pmn->IsEnabled()) return true;
// mn.pubkey = pubkey, IsVinAssociatedWithPubkey is validated once below,
// after that they just need to match
if(pmn->pubkey == pubkey && !pmn->IsBroadcastedWithin(MASTERNODE_MIN_MNB_SECONDS)) {
//take the newest entry
LogPrintf("CMasternodeBroadcast::CheckAndUpdate - Got updated entry for %s\n", addr.ToString());
if(pmn->UpdateFromNewBroadcast((*this))){
pmn->Check();
// normally masternode should be in pre-enabled status after update, if not - do not relay
if(pmn->IsPreEnabled()) {
Relay();
}
}
masternodeSync.AddedMasternodeList(GetHash());
}
return true;
}
bool CMasternodeBroadcast::CheckInputsAndAdd(int& nDos)
{
// we are a masternode with the same vin (i.e. already activated) and this mnb is ours (matches our Masternode privkey)
// so nothing to do here for us
if(fMasterNode && vin.prevout == activeMasternode.vin.prevout && pubkey2 == activeMasternode.pubKeyMasternode)
return true;
// incorrect ping or its sigTime
if(lastPing == CMasternodePing() || !lastPing.CheckAndUpdate(nDos, false, true)) {
return false;
}
// search existing Masternode list
CMasternode* pmn = mnodeman.Find(vin);
if(pmn != NULL) {
// nothing to do here if we already know about this masternode and it's (pre)enabled
if(pmn->IsEnabled() || pmn->IsPreEnabled()) return true;
// if it's not (pre)enabled, remove old MN first and continue
mnodeman.Remove(pmn->vin);
}
if(GetInputAge(vin) < Params().GetConsensus().nMasternodeMinimumConfirmations) {
LogPrintf("CMasternodeBroadcast::CheckInputsAndAdd -- Input must have at least %d confirmations\n", Params().GetConsensus().nMasternodeMinimumConfirmations);
// maybe we miss few blocks, let this mnb to be checked again later
mnodeman.mapSeenMasternodeBroadcast.erase(GetHash());
masternodeSync.mapSeenSyncMNB.erase(GetHash());
return false;
}
CValidationState state;
CMutableTransaction dummyTx = CMutableTransaction();
CTxOut dummyTxOut = CTxOut(999.99*COIN, mnodeman.dummyScriptPubkey);
dummyTx.vin.push_back(vin);
dummyTx.vout.push_back(dummyTxOut);
{
TRY_LOCK(cs_main, lockMain);
if(!lockMain) {
// not mnb fault, let it to be checked again later
mnodeman.mapSeenMasternodeBroadcast.erase(GetHash());
masternodeSync.mapSeenSyncMNB.erase(GetHash());
return false;
}
if(!AcceptToMemoryPool(mempool, state, CTransaction(dummyTx), false, NULL, false, true, true)) {
//set nDos
LogPrint("masternode", "CMasternodeBroadcast::CheckInputsAndAdd -- Failed to accepted Masternode entry to mempool: dummyTx=%s", dummyTx.ToString());
state.IsInvalid(nDos);
return false;
}
}
LogPrint("masternode", "CMasternodeBroadcast::CheckInputsAndAdd -- Accepted Masternode entry to mempool (dry-run mode)\n");
// make sure the vout that was signed is related to the transaction that spawned the Masternode
// - this is expensive, so it's only done once per Masternode
if(!darkSendSigner.IsVinAssociatedWithPubkey(vin, pubkey)) {
LogPrintf("CMasternodeMan::CheckInputsAndAdd - Got mismatched pubkey and vin\n");
nDos = 33;
return false;
}
// verify that sig time is legit in past
// should be at least not earlier than block when 1000 DASH tx got nMasternodeMinimumConfirmations
uint256 hashBlock = uint256();
CTransaction tx2;
GetTransaction(vin.prevout.hash, tx2, Params().GetConsensus(), hashBlock, true);
{
LOCK(cs_main);
BlockMap::iterator mi = mapBlockIndex.find(hashBlock);
if (mi != mapBlockIndex.end() && (*mi).second) {
CBlockIndex* pMNIndex = (*mi).second; // block for 1000 DASH tx -> 1 confirmation
CBlockIndex* pConfIndex = chainActive[pMNIndex->nHeight + Params().GetConsensus().nMasternodeMinimumConfirmations - 1]; // block where tx got nMasternodeMinimumConfirmations
if(pConfIndex->GetBlockTime() > sigTime)
{
LogPrintf("CMasternodeBroadcast::CheckInputsAndAdd - Bad sigTime %d for Masternode %20s %105s (%i conf block is at %d)\n",
sigTime, addr.ToString(), vin.ToString(), Params().GetConsensus().nMasternodeMinimumConfirmations, pConfIndex->GetBlockTime());
return false;
}
}
}
// if it matches our Masternode privkey...
if(fMasterNode && pubkey2 == activeMasternode.pubKeyMasternode) {
if(protocolVersion == PROTOCOL_VERSION) {
// ... and PROTOCOL_VERSION, then we've been remotely activated ...
activeMasternode.EnableRemoteMasterNode(vin, addr);
} else {
// ... otherwise we need to reactivate our node, don not add it to the list and do not relay
// but also do not ban the node we get this message from
LogPrintf("CMasternodeBroadcast::CheckInputsAndAdd - wrong PROTOCOL_VERSION, announce message: %d MN: %d - re-activate your MN\n", protocolVersion, PROTOCOL_VERSION);
return false;
}
}
LogPrintf("CMasternodeBroadcast::CheckInputsAndAdd - Got NEW Masternode entry - %s - %s - %s - %lli \n", GetHash().ToString(), addr.ToString(), vin.ToString(), sigTime);
CMasternode mn(*this);
mnodeman.Add(mn);
bool isLocal = addr.IsRFC1918() || addr.IsLocal();
if(Params().NetworkIDString() == CBaseChainParams::REGTEST) {
isLocal = false;
}
if(!isLocal) {
Relay();
}
return true;
}
void CMasternodeBroadcast::Relay()
{
CInv inv(MSG_MASTERNODE_ANNOUNCE, GetHash());
RelayInv(inv);
}
bool CMasternodeBroadcast::Sign(CKey& keyCollateralAddress)
{
std::string strError;
std::string strMessage;
sigTime = GetAdjustedTime();
strMessage = addr.ToString(false) + boost::lexical_cast<std::string>(sigTime) +
pubkey.GetID().ToString() + pubkey2.GetID().ToString() +
boost::lexical_cast<std::string>(protocolVersion);
if(!darkSendSigner.SignMessage(strMessage, vchSig, keyCollateralAddress)) {
LogPrintf("CMasternodeBroadcast::Sign -- SignMessage() failed\n");
return false;
}
if(!darkSendSigner.VerifyMessage(pubkey, vchSig, strMessage, strError)) {
LogPrintf("CMasternodeBroadcast::Sign -- VerifyMessage() failed, error: %s\n", strError);
return false;
}
return true;
}
bool CMasternodeBroadcast::VerifySignature(int& nDos)
{
std::string strMessage;
std::string strError = "";
nDos = 0;
//
// REMOVE AFTER MIGRATION TO 12.1
//
if(protocolVersion < 70201) {
std::string vchPubKey(pubkey.begin(), pubkey.end());
std::string vchPubKey2(pubkey2.begin(), pubkey2.end());
strMessage = addr.ToString(false) + boost::lexical_cast<std::string>(sigTime) +
vchPubKey + vchPubKey2 + boost::lexical_cast<std::string>(protocolVersion);
LogPrint("masternode", "CMasternodeBroadcast::VerifySignature - sanitized strMessage: %s, pubkey address: %s, sig: %s\n",
SanitizeString(strMessage), CBitcoinAddress(pubkey.GetID()).ToString(),
EncodeBase64(&vchSig[0], vchSig.size()));
if(!darkSendSigner.VerifyMessage(pubkey, vchSig, strMessage, strError)) {
if (addr.ToString() != addr.ToString(false))
{
// maybe it's wrong format, try again with the old one
strMessage = addr.ToString() + boost::lexical_cast<std::string>(sigTime) +
vchPubKey + vchPubKey2 + boost::lexical_cast<std::string>(protocolVersion);
LogPrint("masternode", "CMasternodeBroadcast::VerifySignature - second try, sanitized strMessage: %s, pubkey address: %s, sig: %s\n",
SanitizeString(strMessage), CBitcoinAddress(pubkey.GetID()).ToString(),
EncodeBase64(&vchSig[0], vchSig.size()));
if(!darkSendSigner.VerifyMessage(pubkey, vchSig, strMessage, strError)) {
// didn't work either
LogPrintf("CMasternodeBroadcast::VerifySignature -- Got bad Masternode announce signature, second try, sanitized error: %s\n",
SanitizeString(strError));
// don't ban for old masternodes, their sigs could be broken because of the bug
return false;
}
} else {
// nope, sig is actually wrong
LogPrintf("CMasternodeBroadcast::VerifySignature -- Got bad Masternode announce signature, sanitized error: %s\n",
SanitizeString(strError));
// don't ban for old masternodes, their sigs could be broken because of the bug
return false;
}
}
} else {
//
// END REMOVE
//
strMessage = addr.ToString(false) + boost::lexical_cast<std::string>(sigTime) +
pubkey.GetID().ToString() + pubkey2.GetID().ToString() +
boost::lexical_cast<std::string>(protocolVersion);
LogPrint("masternode", "CMasternodeBroadcast::VerifySignature - strMessage: %s, pubkey address: %s, sig: %s\n", strMessage, CBitcoinAddress(pubkey.GetID()).ToString(), EncodeBase64(&vchSig[0], vchSig.size()));
if(!darkSendSigner.VerifyMessage(pubkey, vchSig, strMessage, strError)){
LogPrintf("CMasternodeBroadcast::VerifySignature -- Got bad Masternode announce signature, error: %s\n", strError);
nDos = 100;
return false;
}
}
return true;
}
CMasternodePing::CMasternodePing()
{
vin = CTxIn();
blockHash = uint256();
sigTime = 0;
vchSig = std::vector<unsigned char>();
}
CMasternodePing::CMasternodePing(CTxIn& newVin)
{
int nHeight;
{
LOCK(cs_main);
CBlockIndex* pindexPrev = chainActive.Tip();
if(!pindexPrev) return;
nHeight = pindexPrev->nHeight;
}
vin = newVin;
blockHash = chainActive[nHeight - 12]->GetBlockHash();
sigTime = GetAdjustedTime();
vchSig = std::vector<unsigned char>();
}
bool CMasternodePing::Sign(CKey& keyMasternode, CPubKey& pubKeyMasternode)
{
std::string strError;
std::string strMasterNodeSignMessage;
sigTime = GetAdjustedTime();
std::string strMessage = vin.ToString() + blockHash.ToString() + boost::lexical_cast<std::string>(sigTime);
if(!darkSendSigner.SignMessage(strMessage, vchSig, keyMasternode)) {
LogPrintf("CMasternodePing::Sign -- SignMessage() failed\n");
return false;
}
if(!darkSendSigner.VerifyMessage(pubKeyMasternode, vchSig, strMessage, strError)) {
LogPrintf("CMasternodePing::Sign -- VerifyMessage() failed, error: %s\n", strError);
return false;
}
return true;
}
bool CMasternodePing::VerifySignature(CPubKey& pubKeyMasternode, int &nDos) {
std::string strMessage = vin.ToString() + blockHash.ToString() + boost::lexical_cast<std::string>(sigTime);
std::string strError = "";
nDos = 0;
if(!darkSendSigner.VerifyMessage(pubKeyMasternode, vchSig, strMessage, strError)) {
LogPrintf("CMasternodePing::VerifySignature -- Got bad Masternode ping signature: %s error: %s\n", vin.ToString(), strError);
nDos = 33;
return false;
}
return true;
}
bool CMasternodePing::CheckAndUpdate(int& nDos, bool fRequireEnabled, bool fCheckSigTimeOnly)
{
if (sigTime > GetAdjustedTime() + 60 * 60) {
LogPrintf("CMasternodePing::CheckAndUpdate - Signature rejected, too far into the future %s\n", vin.ToString());
nDos = 1;
return false;
}
if (sigTime <= GetAdjustedTime() - 60 * 60) {
LogPrintf("CMasternodePing::CheckAndUpdate - Signature rejected, too far into the past %s - %d %d \n", vin.ToString(), sigTime, GetAdjustedTime());
nDos = 1;
return false;
}
if(fCheckSigTimeOnly) {
CMasternode* pmn = mnodeman.Find(vin);
if(pmn) return VerifySignature(pmn->pubkey2, nDos);
return true;
}
LogPrint("masternode", "CMasternodePing::CheckAndUpdate - New Ping %s - %s %s %d\n", vin.ToString(), GetHash().ToString(), blockHash.ToString(), sigTime);
// see if we have this Masternode
CMasternode* pmn = mnodeman.Find(vin);
if(pmn != NULL && pmn->protocolVersion >= mnpayments.GetMinMasternodePaymentsProto())
{
if (fRequireEnabled && !pmn->IsEnabled() && !pmn->IsPreEnabled()) return false;
// LogPrintf("mnping - Found corresponding mn for vin: %s\n", vin.ToString());
// update only if there is no known ping for this masternode or
// last ping was more then MASTERNODE_MIN_MNP_SECONDS-60 ago comparing to this one
if(!pmn->IsPingedWithin(MASTERNODE_MIN_MNP_SECONDS - 60, sigTime))
{
if(!VerifySignature(pmn->pubkey2, nDos))
return false;
{
LOCK(cs_main);
BlockMap::iterator mi = mapBlockIndex.find(blockHash);
if (mi != mapBlockIndex.end() && (*mi).second)
{
if((*mi).second->nHeight < chainActive.Height() - 24)
{
LogPrintf("CMasternodePing::CheckAndUpdate - Masternode %s block hash %s is too old\n", vin.ToString(), blockHash.ToString());
// Do nothing here (no Masternode update, no mnping relay)
// Let this node to be visible but fail to accept mnping
return false;
}
} else {
if (fDebug) LogPrintf("CMasternodePing::CheckAndUpdate - Masternode %s block hash %s is unknown\n", vin.ToString(), blockHash.ToString());
// maybe we stuck so we shouldn't ban this node, just fail to accept it
// TODO: or should we also request this block?
return false;
}
}
pmn->lastPing = *this;
//mnodeman.mapSeenMasternodeBroadcast.lastPing is probably outdated, so we'll update it
CMasternodeBroadcast mnb(*pmn);
uint256 hash = mnb.GetHash();
if(mnodeman.mapSeenMasternodeBroadcast.count(hash)) {
mnodeman.mapSeenMasternodeBroadcast[hash].lastPing = *this;
}
pmn->Check(true);
if(!pmn->IsEnabled()) return false;
LogPrint("masternode", "CMasternodePing::CheckAndUpdate - Masternode ping accepted, vin: %s\n", vin.ToString());
Relay();
return true;
}
LogPrint("masternode", "CMasternodePing::CheckAndUpdate - Masternode ping arrived too early, vin: %s\n", vin.ToString());
//nDos = 1; //disable, this is happening frequently and causing banned peers
return false;
}
LogPrint("masternode", "CMasternodePing::CheckAndUpdate - Couldn't find compatible Masternode entry, vin: %s\n", vin.ToString());
return false;
}
void CMasternodePing::Relay()
{
CInv inv(MSG_MASTERNODE_PING, GetHash());
RelayInv(inv);
}
void CMasternode::AddGovernanceVote(uint256 nGovernanceObjectHash)
{
if(mapGovernaceObjectsVotedOn.count(nGovernanceObjectHash))
{
mapGovernaceObjectsVotedOn[nGovernanceObjectHash]++;
} else {
mapGovernaceObjectsVotedOn.insert(make_pair(nGovernanceObjectHash, 1));
}
}
/**
* FLAG GOVERNANCE ITEMS AS DIRTY
*
* - When masternode come and go on the network, we must flag the items they voted on to recalc it's cached flags
*
*/
void CMasternode::FlagGovernanceItemsAsDirty()
{
std::map<uint256, int>::iterator it = mapGovernaceObjectsVotedOn.begin();
while(it != mapGovernaceObjectsVotedOn.end()){
CGovernanceObject *pObj = governance.FindGovernanceObject((*it).first);
if(pObj) pObj->fDirtyCache = true;
++it;
}
}
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