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main.cpp
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core developers
// Copyright (c) 2015-2020 The Zcash developers
// Copyright (c) 2015-2020 The Komodo Platform developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
/******************************************************************************
* Copyright © 2014-2019 The SuperNET Developers. *
* *
* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
* the top-level directory of this distribution for the individual copyright *
* holder information and the developer policies on copyright and licensing. *
* *
* Unless otherwise agreed in a custom licensing agreement, no part of the *
* SuperNET software, including this file may be copied, modified, propagated *
* or distributed except according to the terms contained in the LICENSE file *
* *
* Removal or modification of this copyright notice is prohibited. *
* *
******************************************************************************/
#include "main.h"
#include "sodium.h"
#include "addrman.h"
#include "alert.h"
#include "arith_uint256.h"
#include "importcoin.h"
#include "chainparams.h"
#include "checkpoints.h"
#include "checkqueue.h"
#include "consensus/upgrades.h"
#include "consensus/validation.h"
#include "deprecation.h"
#include "init.h"
#include "merkleblock.h"
#include "metrics.h"
#include "notarisationdb.h"
#include "net.h"
#include "pow.h"
#include "script/interpreter.h"
#include "txdb.h"
#include "txmempool.h"
#include "ui_interface.h"
#include "undo.h"
#include "util.h"
#include "utilmoneystr.h"
#include "validationinterface.h"
#include "wallet/asyncrpcoperation_sendmany.h"
#include "wallet/asyncrpcoperation_shieldcoinbase.h"
#include "notaries_staked.h"
#include <cstring>
#include <algorithm>
#include <atomic>
#include <sstream>
#include <map>
#include <unordered_map>
#include <vector>
#include <boost/algorithm/string/replace.hpp>
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include <boost/math/distributions/poisson.hpp>
#include <boost/thread.hpp>
#include <boost/static_assert.hpp>
using namespace std;
#if defined(NDEBUG)
# error "Zcash cannot be compiled without assertions."
#endif
#include "librustzcash.h"
/**
* Global state
*/
#define TMPFILE_START 100000000
CCriticalSection cs_main;
//extern uint8_t NOTARY_PUBKEY33[33];
//extern int32_t KOMODO_LOADINGBLOCKS,KOMODO_LONGESTCHAIN,KOMODO_INSYNC,KOMODO_CONNECTING,KOMODO_EXTRASATOSHI;
int32_t KOMODO_NEWBLOCKS;
//int32_t komodo_block2pubkey33(uint8_t *pubkey33,CBlock *block);
//void komodo_broadcast(CBlock *pblock,int32_t limit);
//bool Getscriptaddress(char *destaddr,const CScript &scriptPubKey);
//void komodo_setactivation(int32_t height);
//void komodo_pricesupdate(int32_t height,CBlock *pblock);
BlockMap mapBlockIndex;
CChain chainActive;
CBlockIndex *pindexBestHeader = NULL;
static int64_t nTimeBestReceived = 0;
CWaitableCriticalSection csBestBlock;
CConditionVariable cvBlockChange;
int nScriptCheckThreads = 0;
bool fExperimentalMode = true;
bool fImporting = false;
bool fReindex = false;
bool fTxIndex = false;
bool fAddressIndex = false;
bool fTimestampIndex = false;
bool fSpentIndex = false;
bool fHavePruned = false;
bool fPruneMode = false;
bool fIsBareMultisigStd = true;
bool fCheckBlockIndex = false;
bool fCheckpointsEnabled = true;
bool fCoinbaseEnforcedProtectionEnabled = true;
size_t nCoinCacheUsage = 5000 * 300;
uint64_t nPruneTarget = 0;
bool fAlerts = DEFAULT_ALERTS;
bool fUnspentCCIndex = false;
/* If the tip is older than this (in seconds), the node is considered to be in initial block download.
*/
int64_t nMaxTipAge = DEFAULT_MAX_TIP_AGE;
unsigned int expiryDelta = DEFAULT_TX_EXPIRY_DELTA;
/** Fees smaller than this (in satoshi) are considered zero fee (for relaying and mining) */
CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
CTxMemPool mempool(::minRelayTxFee);
CTxMemPool tmpmempool(::minRelayTxFee);
struct COrphanTx {
CTransaction tx;
NodeId fromPeer;
};
map<uint256, COrphanTx> mapOrphanTransactions GUARDED_BY(cs_main);;
map<uint256, set<uint256> > mapOrphanTransactionsByPrev GUARDED_BY(cs_main);;
void EraseOrphansFor(NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(cs_main);
/**
* Returns true if there are nRequired or more blocks of minVersion or above
* in the last Consensus::Params::nMajorityWindow blocks, starting at pstart and going backwards.
*/
static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned nRequired, const Consensus::Params& consensusParams);
static void CheckBlockIndex();
/** Constant stuff for coinbase transactions we create: */
CScript COINBASE_FLAGS;
const string strMessageMagic = "Komodo Signed Message:\n";
// Internal stuff
namespace {
struct CBlockIndexWorkComparator
{
bool operator()(CBlockIndex *pa, const CBlockIndex *pb) const {
// First sort by most total work, ...
if (ASSETCHAINS_LWMAPOS) {
/* Decker:
seems we had CChainPower classes compare here from Verus, it's slow, bcz of hard
arith_uint256 math in bool operator<(const CChainPower &p1, const CChainPower &p2),
this slows down setBlockIndexCandidates.insert operations in LoadBlockIndexDB(),
so, for faster block index db loading we will use check from Verus only for LWMAPOS
enabled chains.
*/
if (pa->chainPower > pb->chainPower) return false;
if (pa->chainPower < pb->chainPower) return true;
}
else
{
if (pa->chainPower.chainWork > pb->chainPower.chainWork) return false;
if (pa->chainPower.chainWork < pb->chainPower.chainWork) return true;
}
// ... then by earliest time received, ...
if (pa->nSequenceId < pb->nSequenceId) return false;
if (pa->nSequenceId > pb->nSequenceId) return true;
// Use pointer address as tie breaker (should only happen with blocks
// loaded from disk, as those all have id 0).
if (pa < pb) return false;
if (pa > pb) return true;
// Identical blocks.
return false;
}
};
CBlockIndex *pindexBestInvalid;
/**
* The set of all CBlockIndex entries with BLOCK_VALID_TRANSACTIONS (for itself and all ancestors) and
* as good as our current tip or better. Entries may be failed, though, and pruning nodes may be
* missing the data for the block.
*/
//set<CBlockIndex*, CBlockIndexWorkComparator, std::allocator<CBlockIndex*>> setBlockIndexCandidates;
set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexCandidates;
/** Number of nodes with fSyncStarted. */
int nSyncStarted = 0;
/** All pairs A->B, where A (or one if its ancestors) misses transactions, but B has transactions.
* Pruned nodes may have entries where B is missing data.
*/
multimap<CBlockIndex*, CBlockIndex*> mapBlocksUnlinked;
CCriticalSection cs_LastBlockFile;
std::vector<CBlockFileInfo> vinfoBlockFile,tmpBlockFiles;
int nLastBlockFile = 0;
int nLastTmpFile = 0;
unsigned int maxTempFileSize0 = MAX_TEMPFILE_SIZE;
unsigned int maxTempFileSize1 = MAX_TEMPFILE_SIZE;
/** Global flag to indicate we should check to see if there are
* block/undo files that should be deleted. Set on startup
* or if we allocate more file space when we're in prune mode
*/
bool fCheckForPruning = false;
/**
* Every received block is assigned a unique and increasing identifier, so we
* know which one to give priority in case of a fork.
*/
CCriticalSection cs_nBlockSequenceId;
/** Blocks loaded from disk are assigned id 0, so start the counter at 1. */
uint32_t nBlockSequenceId = 1;
/**
* Sources of received blocks, saved to be able to send them reject
* messages or ban them when processing happens afterwards. Protected by
* cs_main.
*/
map<uint256, NodeId> mapBlockSource;
/**
* Filter for transactions that were recently rejected by
* AcceptToMemoryPool. These are not rerequested until the chain tip
* changes, at which point the entire filter is reset. Protected by
* cs_main.
*
* Without this filter we'd be re-requesting txs from each of our peers,
* increasing bandwidth consumption considerably. For instance, with 100
* peers, half of which relay a tx we don't accept, that might be a 50x
* bandwidth increase. A flooding attacker attempting to roll-over the
* filter using minimum-sized, 60byte, transactions might manage to send
* 1000/sec if we have fast peers, so we pick 120,000 to give our peers a
* two minute window to send invs to us.
*
* Decreasing the false positive rate is fairly cheap, so we pick one in a
* million to make it highly unlikely for users to have issues with this
* filter.
*
* Memory used: 1.7MB
*/
boost::scoped_ptr<CRollingBloomFilter> recentRejects;
uint256 hashRecentRejectsChainTip;
/** Blocks that are in flight, and that are in the queue to be downloaded. Protected by cs_main. */
struct QueuedBlock {
uint256 hash;
CBlockIndex *pindex; //! Optional.
int64_t nTime; //! Time of "getdata" request in microseconds.
bool fValidatedHeaders; //! Whether this block has validated headers at the time of request.
int64_t nTimeDisconnect; //! The timeout for this block request (for disconnecting a slow peer)
};
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> > mapBlocksInFlight;
/** Number of blocks in flight with validated headers. */
int nQueuedValidatedHeaders = 0;
/** Number of preferable block download peers. */
int nPreferredDownload = 0;
/** Dirty block index entries. */
set<CBlockIndex*> setDirtyBlockIndex;
/** Dirty block file entries. */
set<int> setDirtyFileInfo;
} // anon namespace
//////////////////////////////////////////////////////////////////////////////
//
// Registration of network node signals.
//
namespace {
struct CBlockReject {
unsigned char chRejectCode;
string strRejectReason;
uint256 hashBlock;
};
/**
* Maintain validation-specific state about nodes, protected by cs_main, instead
* by CNode's own locks. This simplifies asynchronous operation, where
* processing of incoming data is done after the ProcessMessage call returns,
* and we're no longer holding the node's locks.
*/
struct CNodeState {
//! The peer's address
CService address;
//! Whether we have a fully established connection.
bool fCurrentlyConnected;
//! Accumulated misbehaviour score for this peer.
int nMisbehavior;
//! Whether this peer should be disconnected and banned (unless whitelisted).
bool fShouldBan;
//! String name of this peer (debugging/logging purposes).
std::string name;
//! List of asynchronously-determined block rejections to notify this peer about.
std::vector<CBlockReject> rejects;
//! The best known block we know this peer has announced.
CBlockIndex *pindexBestKnownBlock;
//! The hash of the last unknown block this peer has announced.
uint256 hashLastUnknownBlock;
//! The last full block we both have.
CBlockIndex *pindexLastCommonBlock;
//! Whether we've started headers synchronization with this peer.
bool fSyncStarted;
//! Since when we're stalling block download progress (in microseconds), or 0.
int64_t nStallingSince;
list<QueuedBlock> vBlocksInFlight;
int nBlocksInFlight;
int nBlocksInFlightValidHeaders;
//! Whether we consider this a preferred download peer.
bool fPreferredDownload;
CNodeState() {
fCurrentlyConnected = false;
nMisbehavior = 0;
fShouldBan = false;
pindexBestKnownBlock = NULL;
hashLastUnknownBlock.SetNull();
pindexLastCommonBlock = NULL;
fSyncStarted = false;
nStallingSince = 0;
nBlocksInFlight = 0;
nBlocksInFlightValidHeaders = 0;
fPreferredDownload = false;
}
};
/** Map maintaining per-node state. Requires cs_main. */
map<NodeId, CNodeState> mapNodeState;
// Requires cs_main.
CNodeState *State(NodeId pnode) {
map<NodeId, CNodeState>::iterator it = mapNodeState.find(pnode);
if (it == mapNodeState.end())
return NULL;
return &it->second;
}
int GetHeight()
{
CBlockIndex *pindex;
if ( (pindex= chainActive.LastTip()) != 0 )
return pindex->GetHeight();
else return(0);
}
void UpdatePreferredDownload(CNode* node, CNodeState* state)
{
nPreferredDownload -= state->fPreferredDownload;
// Whether this node should be marked as a preferred download node.
state->fPreferredDownload = (!node->fInbound || node->fWhitelisted) && !node->fOneShot && !node->fClient;
nPreferredDownload += state->fPreferredDownload;
}
// Returns time at which to timeout block request (nTime in microseconds)
int64_t GetBlockTimeout(int64_t nTime, int nValidatedQueuedBefore, const Consensus::Params &consensusParams)
{
return nTime + 500000 * consensusParams.nPowTargetSpacing * (4 + nValidatedQueuedBefore);
}
void InitializeNode(NodeId nodeid, const CNode *pnode) {
LOCK(cs_main);
CNodeState &state = mapNodeState.insert(std::make_pair(nodeid, CNodeState())).first->second;
state.name = pnode->addrName;
state.address = pnode->addr;
}
void FinalizeNode(NodeId nodeid) {
LOCK(cs_main);
CNodeState *state = State(nodeid);
if (state->fSyncStarted)
nSyncStarted--;
if (state->nMisbehavior == 0 && state->fCurrentlyConnected) {
AddressCurrentlyConnected(state->address);
}
BOOST_FOREACH(const QueuedBlock& entry, state->vBlocksInFlight)
mapBlocksInFlight.erase(entry.hash);
EraseOrphansFor(nodeid);
nPreferredDownload -= state->fPreferredDownload;
mapNodeState.erase(nodeid);
}
void LimitMempoolSize(CTxMemPool& pool, size_t limit, unsigned long age)
{
/* int expired = pool.Expire(GetTime() - age);
if (expired != 0)
LogPrint("mempool", "Expired %i transactions from the memory pool\n", expired);
std::vector<uint256> vNoSpendsRemaining;
pool.TrimToSize(limit, &vNoSpendsRemaining);
BOOST_FOREACH(const uint256& removed, vNoSpendsRemaining)
pcoinsTip->Uncache(removed);*/
}
// Requires cs_main.
// Returns a bool indicating whether we requested this block.
bool MarkBlockAsReceived(const uint256& hash) {
map<uint256, pair<NodeId, list<QueuedBlock>::iterator> >::iterator itInFlight = mapBlocksInFlight.find(hash);
if (itInFlight != mapBlocksInFlight.end()) {
CNodeState *state = State(itInFlight->second.first);
nQueuedValidatedHeaders -= itInFlight->second.second->fValidatedHeaders;
state->nBlocksInFlightValidHeaders -= itInFlight->second.second->fValidatedHeaders;
state->vBlocksInFlight.erase(itInFlight->second.second);
state->nBlocksInFlight--;
state->nStallingSince = 0;
mapBlocksInFlight.erase(itInFlight);
return true;
}
return false;
}
// Requires cs_main.
void MarkBlockAsInFlight(NodeId nodeid, const uint256& hash, const Consensus::Params& consensusParams, CBlockIndex *pindex = NULL) {
CNodeState *state = State(nodeid);
assert(state != NULL);
// Make sure it's not listed somewhere already.
MarkBlockAsReceived(hash);
int64_t nNow = GetTimeMicros();
QueuedBlock newentry = {hash, pindex, nNow, pindex != NULL, GetBlockTimeout(nNow, nQueuedValidatedHeaders, consensusParams)};
nQueuedValidatedHeaders += newentry.fValidatedHeaders;
list<QueuedBlock>::iterator it = state->vBlocksInFlight.insert(state->vBlocksInFlight.end(), newentry);
state->nBlocksInFlight++;
state->nBlocksInFlightValidHeaders += newentry.fValidatedHeaders;
mapBlocksInFlight[hash] = std::make_pair(nodeid, it);
}
/** Check whether the last unknown block a peer advertized is not yet known. */
void ProcessBlockAvailability(NodeId nodeid) {
CNodeState *state = State(nodeid);
assert(state != NULL);
if (!state->hashLastUnknownBlock.IsNull()) {
BlockMap::iterator itOld = mapBlockIndex.find(state->hashLastUnknownBlock);
if (itOld != mapBlockIndex.end() && itOld->second != 0 && (itOld->second->chainPower > CChainPower()))
{
if (state->pindexBestKnownBlock == NULL || itOld->second->chainPower >= state->pindexBestKnownBlock->chainPower)
state->pindexBestKnownBlock = itOld->second;
state->hashLastUnknownBlock.SetNull();
}
}
}
/** Update tracking information about which blocks a peer is assumed to have. */
void UpdateBlockAvailability(NodeId nodeid, const uint256 &hash) {
CNodeState *state = State(nodeid);
assert(state != NULL);
/*ProcessBlockAvailability(nodeid);
BlockMap::iterator it = mapBlockIndex.find(hash);
if (it != mapBlockIndex.end() && it->second->nChainWork > 0) {
// An actually better block was announced.
if (state->pindexBestKnownBlock == NULL || it->second->nChainWork >= state->pindexBestKnownBlock->nChainWork)
state->pindexBestKnownBlock = it->second;
} else*/
{
// An unknown block was announced; just assume that the latest one is the best one.
state->hashLastUnknownBlock = hash;
}
}
/** Find the last common ancestor two blocks have.
* Both pa and pb must be non-NULL. */
CBlockIndex* LastCommonAncestor(CBlockIndex* pa, CBlockIndex* pb) {
if (pa->GetHeight() > pb->GetHeight()) {
pa = pa->GetAncestor(pb->GetHeight());
} else if (pb->GetHeight() > pa->GetHeight()) {
pb = pb->GetAncestor(pa->GetHeight());
}
while (pa != pb && pa && pb) {
pa = pa->pprev;
pb = pb->pprev;
}
// Eventually all chain branches meet at the genesis block.
assert(pa == pb);
return pa;
}
/** Update pindexLastCommonBlock and add not-in-flight missing successors to vBlocks, until it has
* at most count entries. */
void FindNextBlocksToDownload(NodeId nodeid, unsigned int count, std::vector<CBlockIndex*>& vBlocks, NodeId& nodeStaller) {
if (count == 0)
return;
vBlocks.reserve(vBlocks.size() + count);
CNodeState *state = State(nodeid);
assert(state != NULL);
// Make sure pindexBestKnownBlock is up to date, we'll need it.
ProcessBlockAvailability(nodeid);
if (state->pindexBestKnownBlock == NULL || state->pindexBestKnownBlock->chainPower < chainActive.Tip()->chainPower) {
// This peer has nothing interesting.
return;
}
if (state->pindexLastCommonBlock == NULL) {
// Bootstrap quickly by guessing a parent of our best tip is the forking point.
// Guessing wrong in either direction is not a problem.
state->pindexLastCommonBlock = chainActive[std::min(state->pindexBestKnownBlock->GetHeight(), chainActive.Height())];
}
// If the peer reorganized, our previous pindexLastCommonBlock may not be an ancestor
// of its current tip anymore. Go back enough to fix that.
state->pindexLastCommonBlock = LastCommonAncestor(state->pindexLastCommonBlock, state->pindexBestKnownBlock);
if (state->pindexLastCommonBlock == state->pindexBestKnownBlock)
return;
std::vector<CBlockIndex*> vToFetch;
CBlockIndex *pindexWalk = state->pindexLastCommonBlock;
// Never fetch further than the best block we know the peer has, or more than BLOCK_DOWNLOAD_WINDOW + 1 beyond the last
// linked block we have in common with this peer. The +1 is so we can detect stalling, namely if we would be able to
// download that next block if the window were 1 larger.
if ( ASSETCHAINS_CBOPRET != 0 && IsInitialBlockDownload() == 0 )
BLOCK_DOWNLOAD_WINDOW = 1;
int nWindowEnd = state->pindexLastCommonBlock->GetHeight() + BLOCK_DOWNLOAD_WINDOW;
int nMaxHeight = std::min<int>(state->pindexBestKnownBlock->GetHeight(), nWindowEnd + 1);
NodeId waitingfor = -1;
while (pindexWalk->GetHeight() < nMaxHeight) {
// Read up to 128 (or more, if more blocks than that are needed) successors of pindexWalk (towards
// pindexBestKnownBlock) into vToFetch. We fetch 128, because CBlockIndex::GetAncestor may be as expensive
// as iterating over ~100 CBlockIndex* entries anyway.
int nToFetch = std::min(nMaxHeight - pindexWalk->GetHeight(), std::max<int>(count - vBlocks.size(), 128));
vToFetch.resize(nToFetch);
pindexWalk = state->pindexBestKnownBlock->GetAncestor(pindexWalk->GetHeight() + nToFetch);
vToFetch[nToFetch - 1] = pindexWalk;
for (unsigned int i = nToFetch - 1; i > 0; i--) {
vToFetch[i - 1] = vToFetch[i]->pprev;
}
// Iterate over those blocks in vToFetch (in forward direction), adding the ones that
// are not yet downloaded and not in flight to vBlocks. In the meantime, update
// pindexLastCommonBlock as long as all ancestors are already downloaded, or if it's
// already part of our chain (and therefore don't need it even if pruned).
BOOST_FOREACH(CBlockIndex* pindex, vToFetch) {
if (!pindex->IsValid(BLOCK_VALID_TREE)) {
// We consider the chain that this peer is on invalid.
return;
}
if (pindex->nStatus & BLOCK_HAVE_DATA || chainActive.Contains(pindex)) {
if (pindex->nChainTx)
state->pindexLastCommonBlock = pindex;
} else if (mapBlocksInFlight.count(pindex->GetBlockHash()) == 0) {
// The block is not already downloaded, and not yet in flight.
if (pindex->GetHeight() > nWindowEnd) {
// We reached the end of the window.
if (vBlocks.size() == 0 && waitingfor != nodeid) {
// We aren't able to fetch anything, but we would be if the download window was one larger.
nodeStaller = waitingfor;
}
return;
}
vBlocks.push_back(pindex);
if (vBlocks.size() == count) {
return;
}
} else if (waitingfor == -1) {
// This is the first already-in-flight block.
waitingfor = mapBlocksInFlight[pindex->GetBlockHash()].first;
}
}
}
}
} // anon namespace
bool GetNodeStateStats(NodeId nodeid, CNodeStateStats &stats) {
LOCK(cs_main);
CNodeState *state = State(nodeid);
if (state == NULL)
return false;
stats.nMisbehavior = state->nMisbehavior;
stats.nSyncHeight = state->pindexBestKnownBlock ? state->pindexBestKnownBlock->GetHeight() : -1;
stats.nCommonHeight = state->pindexLastCommonBlock ? state->pindexLastCommonBlock->GetHeight() : -1;
BOOST_FOREACH(const QueuedBlock& queue, state->vBlocksInFlight) {
if (queue.pindex)
stats.vHeightInFlight.push_back(queue.pindex->GetHeight());
}
return true;
}
void RegisterNodeSignals(CNodeSignals& nodeSignals)
{
nodeSignals.GetHeight.connect(&GetHeight);
nodeSignals.ProcessMessages.connect(&ProcessMessages);
nodeSignals.SendMessages.connect(&SendMessages);
nodeSignals.InitializeNode.connect(&InitializeNode);
nodeSignals.FinalizeNode.connect(&FinalizeNode);
}
void UnregisterNodeSignals(CNodeSignals& nodeSignals)
{
nodeSignals.GetHeight.disconnect(&GetHeight);
nodeSignals.ProcessMessages.disconnect(&ProcessMessages);
nodeSignals.SendMessages.disconnect(&SendMessages);
nodeSignals.InitializeNode.disconnect(&InitializeNode);
nodeSignals.FinalizeNode.disconnect(&FinalizeNode);
}
CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator)
{
// Find the first block the caller has in the main chain
BOOST_FOREACH(const uint256& hash, locator.vHave) {
BlockMap::iterator mi = mapBlockIndex.find(hash);
if (mi != mapBlockIndex.end())
{
CBlockIndex* pindex = (*mi).second;
if (pindex != 0 && chain.Contains(pindex))
return pindex;
if (pindex != 0 && pindex->GetAncestor(chain.Height()) == chain.Tip()) {
return chain.Tip();
}
}
}
return chain.Genesis();
}
CCoinsViewCache *pcoinsTip = NULL;
CBlockTreeDB *pblocktree = NULL;
// Komodo globals
#define KOMODO_ZCASH
#include "komodo_defs.h"
#include "komodo.h"
UniValue komodo_snapshot(int top)
{
LOCK(cs_main);
int64_t total = -1;
UniValue result(UniValue::VOBJ);
if (fAddressIndex) {
if ( pblocktree != 0 ) {
result = pblocktree->Snapshot(top);
} else {
fprintf(stderr,"null pblocktree start with -addressindex=1\n");
}
} else {
fprintf(stderr,"getsnapshot requires -addressindex=1\n");
}
return(result);
}
bool komodo_snapshot2(std::map <std::string, CAmount> &addressAmounts)
{
if ( fAddressIndex && pblocktree != 0 )
{
return pblocktree->Snapshot2(addressAmounts, 0);
}
else return false;
}
int32_t lastSnapShotHeight = 0;
std::vector <std::pair<CAmount, CTxDestination>> vAddressSnapshot;
bool komodo_dailysnapshot(int32_t height)
{
int reorglimit = 100;
uint256 notarized_hash,notarized_desttxid; int32_t prevMoMheight,notarized_height,undo_height,extraoffset;
// NOTE: To make this 100% safe under all sync conditions, it should be using a notarized notarization, from the DB.
// Under heavy reorg attack, its possible `komodo_notarized_height` can return a height that can't be found on chain sync.
// However, the DB can reorg the last notarization. By using 2 deep, we know 100% that the previous notarization cannot be reorged by online nodes,
// and as such will always be notarizing the same height. May need to check heights on scan back to make sure they are confirmed in correct order.
if ( (extraoffset= height % KOMODO_SNAPSHOT_INTERVAL) != 0 )
{
// we are on chain init, and need to scan all the way back to the correct height, other wise our node will have a diffrent snapshot to online nodes.
// use the notarizationsDB to scan back from the consesnus height to get the offset we need.
std::string symbol; Notarisation nota;
symbol.assign(ASSETCHAINS_SYMBOL);
if ( ScanNotarisationsDB(height-extraoffset, symbol, 100, nota) == 0 )
undo_height = height-extraoffset-reorglimit;
else undo_height = nota.second.height;
//fprintf(stderr, "height.%i-extraoffset.%i = startscanfrom.%i to get undo_height.%i\n", height, extraoffset, height-extraoffset, undo_height);
}
else
{
// we are at the right height in connect block to scan back to last notarized height.
notarized_height = komodo_notarized_height(&prevMoMheight,¬arized_hash,¬arized_desttxid);
notarized_height > height-reorglimit ? undo_height = notarized_height : undo_height = height-reorglimit;
}
fprintf(stderr, "doing snapshot for height.%i undo_height.%i\n", height, undo_height);
// if we already did this height dont bother doing it again, this is just a reorg. The actual snapshot height cannot be reorged.
if ( undo_height == lastSnapShotHeight )
return true;
std::map <std::string, int64_t> addressAmounts;
if ( !komodo_snapshot2(addressAmounts) )
return false;
// undo blocks in reverse order
for (int32_t n = height; n > undo_height; n--)
{
//fprintf(stderr, "undoing block.%i\n",n);
CBlockIndex *pindex; CBlock block;
if ( (pindex= komodo_chainactive(n)) == 0 || komodo_blockload(block, pindex) != 0 )
return false;
// undo transactions in reverse order
for (int32_t i = block.vtx.size() - 1; i >= 0; i--)
{
const CTransaction &tx = block.vtx[i];
CTxDestination vDest;
// loop vouts reverse order, remove value recieved.
for (unsigned int k = tx.vout.size(); k-- > 0;)
{
const CTxOut &out = tx.vout[k];
if ( ExtractDestination(out.scriptPubKey, vDest) )
{
addressAmounts[CBitcoinAddress(vDest).ToString()] -= out.nValue;
if ( addressAmounts[CBitcoinAddress(vDest).ToString()] < 1 )
addressAmounts.erase(CBitcoinAddress(vDest).ToString());
//fprintf(stderr, "VOUT: address.%s remove_coins.%li\n",CBitcoinAddress(vDest).ToString().c_str(), out.nValue);
}
}
// loop vins in reverse order, get prevout and return the sent balance.
for (unsigned int j = tx.vin.size(); j-- > 0;)
{
uint256 blockhash; CTransaction txin;
if (tx.IsPegsImport() && j==0) continue;
if ( !tx.IsCoinImport() && !tx.IsCoinBase() && myGetTransaction(tx.vin[j].prevout.hash,txin,blockhash) )
{
int vout = tx.vin[j].prevout.n;
if ( ExtractDestination(txin.vout[vout].scriptPubKey, vDest) )
{
//fprintf(stderr, "VIN: address.%s add_coins.%li\n",CBitcoinAddress(vDest).ToString().c_str(), txin.vout[vout].nValue);
addressAmounts[CBitcoinAddress(vDest).ToString()] += txin.vout[vout].nValue;
}
}
}
}
}
vAddressSnapshot.clear(); // clear existing snapshot
// convert address string to destination for easier conversion to what ever is required, eg, scriptPubKey.
for ( auto element : addressAmounts)
vAddressSnapshot.push_back(make_pair(element.second, DecodeDestination(element.first)));
// sort the vector by amount, highest at top.
std::sort(vAddressSnapshot.rbegin(), vAddressSnapshot.rend());
//for (int j = 0; j < 50; j++)
// fprintf(stderr, "j.%i address.%s nValue.%li\n",j, CBitcoinAddress(vAddressSnapshot[j].second).ToString().c_str(), vAddressSnapshot[j].first );
// include only top 3999 address.
if ( vAddressSnapshot.size() > 3999 ) vAddressSnapshot.resize(3999);
lastSnapShotHeight = undo_height;
fprintf(stderr, "vAddressSnapshot.size.%d\n", (int32_t)vAddressSnapshot.size());
return true;
}
//////////////////////////////////////////////////////////////////////////////
//
// mapOrphanTransactions
//
bool AddOrphanTx(const CTransaction& tx, NodeId peer) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
uint256 hash = tx.GetHash();
if (mapOrphanTransactions.count(hash))
return false;
// Ignore big transactions, to avoid a
// send-big-orphans memory exhaustion attack. If a peer has a legitimate
// large transaction with a missing parent then we assume
// it will rebroadcast it later, after the parent transaction(s)
// have been mined or received.
// 10,000 orphans, each of which is at most 5,000 bytes big is
// at most 500 megabytes of orphans:
unsigned int sz = GetSerializeSize(tx, SER_NETWORK, tx.nVersion);
if (sz > 5000)
{
LogPrint("mempool", "ignoring large orphan tx (size: %u, hash: %s)\n", sz, hash.ToString());
return false;
}
mapOrphanTransactions[hash].tx = tx;
mapOrphanTransactions[hash].fromPeer = peer;
BOOST_FOREACH(const CTxIn& txin, tx.vin)
mapOrphanTransactionsByPrev[txin.prevout.hash].insert(hash);
LogPrint("mempool", "stored orphan tx %s (mapsz %u prevsz %u)\n", hash.ToString(),
mapOrphanTransactions.size(), mapOrphanTransactionsByPrev.size());
return true;
}
void static EraseOrphanTx(uint256 hash) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
map<uint256, COrphanTx>::iterator it = mapOrphanTransactions.find(hash);
if (it == mapOrphanTransactions.end())
return;
BOOST_FOREACH(const CTxIn& txin, it->second.tx.vin)
{
map<uint256, set<uint256> >::iterator itPrev = mapOrphanTransactionsByPrev.find(txin.prevout.hash);
if (itPrev == mapOrphanTransactionsByPrev.end())
continue;
itPrev->second.erase(hash);
if (itPrev->second.empty())
mapOrphanTransactionsByPrev.erase(itPrev);
}
mapOrphanTransactions.erase(it);
}
void EraseOrphansFor(NodeId peer)
{
int nErased = 0;
map<uint256, COrphanTx>::iterator iter = mapOrphanTransactions.begin();
while (iter != mapOrphanTransactions.end())
{
map<uint256, COrphanTx>::iterator maybeErase = iter++; // increment to avoid iterator becoming invalid
if (maybeErase->second.fromPeer == peer)
{
EraseOrphanTx(maybeErase->second.tx.GetHash());
++nErased;
}
}
if (nErased > 0) LogPrint("mempool", "Erased %d orphan tx from peer %d\n", nErased, peer);
}
unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans) EXCLUSIVE_LOCKS_REQUIRED(cs_main)
{
unsigned int nEvicted = 0;
while (mapOrphanTransactions.size() > nMaxOrphans)
{
// Evict a random orphan:
uint256 randomhash = GetRandHash();
map<uint256, COrphanTx>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
if (it == mapOrphanTransactions.end())
it = mapOrphanTransactions.begin();
EraseOrphanTx(it->first);
++nEvicted;
}
return nEvicted;
}
bool IsStandardTx(const CTransaction& tx, string& reason, const int nHeight)
{
bool overwinterActive = NetworkUpgradeActive(nHeight, Params().GetConsensus(), Consensus::UPGRADE_OVERWINTER);
bool saplingActive = NetworkUpgradeActive(nHeight, Params().GetConsensus(), Consensus::UPGRADE_SAPLING);
if (saplingActive) {
// Sapling standard rules apply
if (tx.nVersion > CTransaction::SAPLING_MAX_CURRENT_VERSION || tx.nVersion < CTransaction::SAPLING_MIN_CURRENT_VERSION) {
reason = "sapling-version";
return false;
}
} else if (overwinterActive) {
// Overwinter standard rules apply
if (tx.nVersion > CTransaction::OVERWINTER_MAX_CURRENT_VERSION || tx.nVersion < CTransaction::OVERWINTER_MIN_CURRENT_VERSION) {
reason = "overwinter-version";
return false;
}
} else {
// Sprout standard rules apply
if (tx.nVersion > CTransaction::SPROUT_MAX_CURRENT_VERSION || tx.nVersion < CTransaction::SPROUT_MIN_CURRENT_VERSION) {
reason = "version";
return false;
}
}
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
// Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed
// keys. (remember the 520 byte limit on redeemScript size) That works
// out to a (15*(33+1))+3=513 byte redeemScript, 513+1+15*(73+1)+3=1627
// bytes of scriptSig, which we round off to 1650 bytes for some minor
// future-proofing. That's also enough to spend a 20-of-20
// CHECKMULTISIG scriptPubKey, though such a scriptPubKey is not
// considered standard)
if (txin.scriptSig.size() > 1650) {
reason = "scriptsig-size";
return false;
}
if (!txin.scriptSig.IsPushOnly()) {
reason = "scriptsig-not-pushonly";
return false;
}
}
unsigned int v=0,nDataOut = 0;
txnouttype whichType;
BOOST_FOREACH(const CTxOut& txout, tx.vout)
{
if (!::IsStandard(txout.scriptPubKey, whichType))
{
reason = "scriptpubkey";
//fprintf(stderr,">>>>>>>>>>>>>>> vout.%d nDataout.%d\n",v,nDataOut);
return false;
}
if (whichType == TX_NULL_DATA)
{
if ( txout.scriptPubKey.size() > IGUANA_MAXSCRIPTSIZE )
{
reason = "opreturn too big";
return(false);
}
nDataOut++;
//fprintf(stderr,"is OP_RETURN\n");
}
else if ((whichType == TX_MULTISIG) && (!fIsBareMultisigStd)) {
reason = "bare-multisig";
return false;
} else if (whichType != TX_CRYPTOCONDITION /*!IsCryptoConditionsEnabled()*/ && txout.IsDust(::minRelayTxFee)) { // allow dust for cc chains
reason = "dust";
return false;
}
v++;
}
// only one OP_RETURN txout is permitted
if (nDataOut > 1) {
reason = "multi-op-return";
return false;
}
return true;
}
bool IsFinalTx(const CTransaction &tx, int nBlockHeight, int64_t nBlockTime)
{
if (tx.nLockTime == 0)
return true;
if ((int64_t)tx.nLockTime < ((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD ? (int64_t)nBlockHeight : nBlockTime))
return true;
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
if ( !komodo_hardfork_active(nBlockTime) && txin.nSequence == 0xfffffffe &&
//if ( (nBlockTime <= ASSETCHAINS_STAKED_HF_TIMESTAMP ) && txin.nSequence == 0xfffffffe &&
(
((int64_t)tx.nLockTime >= LOCKTIME_THRESHOLD && (int64_t)tx.nLockTime > nBlockTime) ||
((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD && (int64_t)tx.nLockTime > nBlockHeight)
)
)
{
}
//else if ( nBlockTime > ASSETCHAINS_STAKED_HF_TIMESTAMP && txin.nSequence == 0xfffffffe &&
else if ( komodo_hardfork_active(nBlockTime) && txin.nSequence == 0xfffffffe &&
(
((int64_t)tx.nLockTime >= LOCKTIME_THRESHOLD && (int64_t)tx.nLockTime <= nBlockTime) ||
((int64_t)tx.nLockTime < LOCKTIME_THRESHOLD && (int64_t)tx.nLockTime <= nBlockHeight))
)
{
}
else if (!txin.IsFinal())
{
LogPrintf("non-final txin seq.%x locktime.%u vs nTime.%u\n",txin.nSequence,(uint32_t)tx.nLockTime,(uint32_t)nBlockTime);
return false;
}
}
return true;
}
bool IsExpiredTx(const CTransaction &tx, int nBlockHeight)
{
if (tx.nExpiryHeight == 0 || tx.IsCoinBase()) {
return false;
}
return static_cast<uint32_t>(nBlockHeight) > tx.nExpiryHeight;
}
bool CheckFinalTx(const CTransaction &tx, int flags)
{
AssertLockHeld(cs_main);
// By convention a negative value for flags indicates that the
// current network-enforced consensus rules should be used. In
// a future soft-fork scenario that would mean checking which
// rules would be enforced for the next block and setting the
// appropriate flags. At the present time no soft-forks are
// scheduled, so no flags are set.
flags = std::max(flags, 0);
// CheckFinalTx() uses chainActive.Height()+1 to evaluate