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main.cpp
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main.cpp
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "alert.h"
#include "checkpoints.h"
#include "db.h"
#include "txdb.h"
#include "net.h"
#include "init.h"
#include "ui_interface.h"
#include "checkqueue.h"
#include <boost/algorithm/string/replace.hpp>
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include "fixed.h"
#include <stdint.h>
#include <boost/random/mersenne_twister.hpp>
#include <boost/random/uniform_int_distribution.hpp>
using namespace std;
using namespace boost;
using namespace numeric;
#if defined(NDEBUG)
# error "Kurrent cannot be compiled without assertions."
#endif
#define ZEROCOIN_MODULUS "25195908475657893494027183240048398571429282126204032027777137836043662020707595556264018525880784406918290641249515082189298559149176184502808489120072844992687392807287776735971418347270261896375014971824691165077613379859095700097330459748808428401797429100642458691817195118746121515172654632282216869987549182422433637259085141865462043576798423387184774447920739934236584823824281198163815010674810451660377306056201619676256133844143603833904414952634432190114657544454178424020924616515723350778707749817125772467962926386356373289912154831438167899885040445364023527381951378636564391212010397122822120720357"
//
// Global state
//
CCriticalSection cs_setpwalletRegistered;
set<CWallet*> setpwalletRegistered;
CCriticalSection cs_main;
CTxMemPool mempool;
unsigned int nTransactionsUpdated = 0;
map<uint256, CBlockIndex*> mapBlockIndex;
uint256 hashGenesisBlockTest = uint256("0x6df4d9e709cfb430a1a1e650b676bb589bd57ba5244fec685a1660a545298bce");
uint256 hashGenesisBlockMain = uint256("0x8e4bd83026896b9e882d4970b1d63bf6785371b5d6595ea3c905497e54f4ad09");
uint256 hashGenesisBlock = hashGenesisBlockMain;
uint256 hashGenesisMerkleRootTest = uint256("0xa79c870a60e9b37f4d5691a7d926067a2c20c9292a996289019ef3e79f6129c9");
uint256 hashGenesisMerkleRootMain = uint256("0xf6587dca41cb0f3bd057d0eef8f2ffbb17b18d14f993685f7e5c246ce92838d9");
uint256 hashGenesisMerkleRoot = hashGenesisMerkleRootMain;
CBigNum bnProofOfWorkLimit(~uint256(0) >> 20); // Kurrent: starting difficulty is 1 / 2^20
CBlockIndex* pindexGenesisBlock = NULL;
int nBestHeight = -1;
uint256 nBestChainWork = 0;
uint256 nBestInvalidWork = 0;
uint256 hashBestChain = 0;
CBlockIndex* pindexBest = NULL;
set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexValid; // may contain all CBlockIndex*'s that have validness >=BLOCK_VALID_TRANSACTIONS, and must contain those who aren't failed
int64 nTimeBestReceived = 0;
int nScriptCheckThreads = 0;
bool fImporting = false;
bool fReindex = false;
bool fBenchmark = false;
bool fTxIndex = false;
unsigned int nCoinCacheSize = 5000;
/** Fees smaller than this (in ztoshi) are considered zero fee (for transaction creation) */
int64 CTransaction::nMinTxFee = 1000; // 0.00001 Kurrent
/** Fees smaller than this (in ztoshi) are considered zero fee (for relaying) */
int64 CTransaction::nMinRelayTxFee = 1000; // 0.00001 Kurrent
CMedianFilter<int> cPeerBlockCounts(8, 0); // Amount of blocks that other nodes claim to have
map<uint256, CBlock*> mapOrphanBlocks;
multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
map<uint256, CTransaction> mapOrphanTransactions;
map<uint256, set<uint256> > mapOrphanTransactionsByPrev;
// Constant stuff for coinbase transactions we create:
CScript COINBASE_FLAGS;
const string strMessageMagic = "Kurrent Signed Message:\n";
double dHashesPerSec = 0.0;
int64 nHPSTimerStart = 0;
// Settings
int64 nTransactionFee = 0;
int64 nMinimumInputValue = DUST_HARD_LIMIT;
//////////////////////////////////////////////////////////////////////////////
//
// dispatching functions
//
// These functions dispatch to one or all registered wallets
void RegisterWallet(CWallet* pwalletIn)
{
{
LOCK(cs_setpwalletRegistered);
setpwalletRegistered.insert(pwalletIn);
}
}
void UnregisterWallet(CWallet* pwalletIn)
{
{
LOCK(cs_setpwalletRegistered);
setpwalletRegistered.erase(pwalletIn);
}
}
// get the wallet transaction with the given hash (if it exists)
bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
if (pwallet->GetTransaction(hashTx,wtx))
return true;
return false;
}
// erases transaction with the given hash from all wallets
void static EraseFromWallets(uint256 hash)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->EraseFromWallet(hash);
}
// make sure all wallets know about the given transaction, in the given block
void SyncWithWallets(const uint256 &hash, const CTransaction& tx, const CBlock* pblock, bool fUpdate)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->AddToWalletIfInvolvingMe(hash, tx, pblock, fUpdate);
}
// notify wallets about a new best chain
void static SetBestChain(const CBlockLocator& loc)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->SetBestChain(loc);
}
// notify wallets about an updated transaction
void static UpdatedTransaction(const uint256& hashTx)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->UpdatedTransaction(hashTx);
}
// dump all wallets
void static PrintWallets(const CBlock& block)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->PrintWallet(block);
}
// notify wallets about an incoming inventory (for request counts)
void static Inventory(const uint256& hash)
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->Inventory(hash);
}
// ask wallets to resend their transactions
void static ResendWalletTransactions()
{
BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
pwallet->ResendWalletTransactions();
}
//////////////////////////////////////////////////////////////////////////////
//
// CCoinsView implementations
//
bool CCoinsView::GetCoins(const uint256 &txid, CCoins &coins) { return false; }
bool CCoinsView::SetCoins(const uint256 &txid, const CCoins &coins) { return false; }
bool CCoinsView::HaveCoins(const uint256 &txid) { return false; }
CBlockIndex *CCoinsView::GetBestBlock() { return NULL; }
bool CCoinsView::SetBestBlock(CBlockIndex *pindex) { return false; }
bool CCoinsView::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) { return false; }
bool CCoinsView::GetStats(CCoinsStats &stats) { return false; }
CCoinsViewBacked::CCoinsViewBacked(CCoinsView &viewIn) : base(&viewIn) { }
bool CCoinsViewBacked::GetCoins(const uint256 &txid, CCoins &coins) { return base->GetCoins(txid, coins); }
bool CCoinsViewBacked::SetCoins(const uint256 &txid, const CCoins &coins) { return base->SetCoins(txid, coins); }
bool CCoinsViewBacked::HaveCoins(const uint256 &txid) { return base->HaveCoins(txid); }
CBlockIndex *CCoinsViewBacked::GetBestBlock() { return base->GetBestBlock(); }
bool CCoinsViewBacked::SetBestBlock(CBlockIndex *pindex) { return base->SetBestBlock(pindex); }
void CCoinsViewBacked::SetBackend(CCoinsView &viewIn) { base = &viewIn; }
bool CCoinsViewBacked::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) { return base->BatchWrite(mapCoins, pindex); }
bool CCoinsViewBacked::GetStats(CCoinsStats &stats) { return base->GetStats(stats); }
CCoinsViewCache::CCoinsViewCache(CCoinsView &baseIn, bool fDummy) : CCoinsViewBacked(baseIn), pindexTip(NULL) { }
bool CCoinsViewCache::GetCoins(const uint256 &txid, CCoins &coins) {
if (cacheCoins.count(txid)) {
coins = cacheCoins[txid];
return true;
}
if (base->GetCoins(txid, coins)) {
cacheCoins[txid] = coins;
return true;
}
return false;
}
std::map<uint256,CCoins>::iterator CCoinsViewCache::FetchCoins(const uint256 &txid) {
std::map<uint256,CCoins>::iterator it = cacheCoins.lower_bound(txid);
if (it != cacheCoins.end() && it->first == txid)
return it;
CCoins tmp;
if (!base->GetCoins(txid,tmp))
return cacheCoins.end();
std::map<uint256,CCoins>::iterator ret = cacheCoins.insert(it, std::make_pair(txid, CCoins()));
tmp.swap(ret->second);
return ret;
}
CCoins &CCoinsViewCache::GetCoins(const uint256 &txid) {
std::map<uint256,CCoins>::iterator it = FetchCoins(txid);
assert(it != cacheCoins.end());
return it->second;
}
bool CCoinsViewCache::SetCoins(const uint256 &txid, const CCoins &coins) {
cacheCoins[txid] = coins;
return true;
}
bool CCoinsViewCache::HaveCoins(const uint256 &txid) {
return FetchCoins(txid) != cacheCoins.end();
}
CBlockIndex *CCoinsViewCache::GetBestBlock() {
if (pindexTip == NULL)
pindexTip = base->GetBestBlock();
return pindexTip;
}
bool CCoinsViewCache::SetBestBlock(CBlockIndex *pindex) {
pindexTip = pindex;
return true;
}
bool CCoinsViewCache::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) {
for (std::map<uint256, CCoins>::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++)
cacheCoins[it->first] = it->second;
pindexTip = pindex;
return true;
}
bool CCoinsViewCache::Flush() {
bool fOk = base->BatchWrite(cacheCoins, pindexTip);
if (fOk)
cacheCoins.clear();
return fOk;
}
unsigned int CCoinsViewCache::GetCacheSize() {
return cacheCoins.size();
}
/** CCoinsView that brings transactions from a memorypool into view.
It does not check for spendings by memory pool transactions. */
CCoinsViewMemPool::CCoinsViewMemPool(CCoinsView &baseIn, CTxMemPool &mempoolIn) : CCoinsViewBacked(baseIn), mempool(mempoolIn) { }
bool CCoinsViewMemPool::GetCoins(const uint256 &txid, CCoins &coins) {
if (base->GetCoins(txid, coins))
return true;
if (mempool.exists(txid)) {
const CTransaction &tx = mempool.lookup(txid);
coins = CCoins(tx, MEMPOOL_HEIGHT);
return true;
}
return false;
}
bool CCoinsViewMemPool::HaveCoins(const uint256 &txid) {
return mempool.exists(txid) || base->HaveCoins(txid);
}
CCoinsViewCache *pcoinsTip = NULL;
CBlockTreeDB *pblocktree = NULL;
//////////////////////////////////////////////////////////////////////////////
//
// mapOrphanTransactions
//
bool AddOrphanTx(const CTransaction& tx)
{
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 = tx.GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
if (sz > 5000)
{
printf("ignoring large orphan tx (size: %u, hash: %s)\n", sz, hash.ToString().c_str());
return false;
}
mapOrphanTransactions[hash] = tx;
BOOST_FOREACH(const CTxIn& txin, tx.vin)
mapOrphanTransactionsByPrev[txin.prevout.hash].insert(hash);
printf("stored orphan tx %s (mapsz %"PRIszu")\n", hash.ToString().c_str(),
mapOrphanTransactions.size());
return true;
}
void static EraseOrphanTx(uint256 hash)
{
if (!mapOrphanTransactions.count(hash))
return;
const CTransaction& tx = mapOrphanTransactions[hash];
BOOST_FOREACH(const CTxIn& txin, tx.vin)
{
mapOrphanTransactionsByPrev[txin.prevout.hash].erase(hash);
if (mapOrphanTransactionsByPrev[txin.prevout.hash].empty())
mapOrphanTransactionsByPrev.erase(txin.prevout.hash);
}
mapOrphanTransactions.erase(hash);
}
unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
{
unsigned int nEvicted = 0;
while (mapOrphanTransactions.size() > nMaxOrphans)
{
// Evict a random orphan:
uint256 randomhash = GetRandHash();
map<uint256, CTransaction>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
if (it == mapOrphanTransactions.end())
it = mapOrphanTransactions.begin();
EraseOrphanTx(it->first);
++nEvicted;
}
return nEvicted;
}
//////////////////////////////////////////////////////////////////////////////
//
// CTransaction / CTxOut
//
bool CTxOut::IsDust() const
{
// Kurrent: IsDust() detection disabled, allows any valid dust to be relayed.
// The fees imposed on each dust txo is considered sufficient spam deterrant.
return false;
}
bool CTransaction::IsStandard(string& strReason) const
{
if (nVersion > CTransaction::CURRENT_VERSION || nVersion < 1) {
strReason = "version";
return false;
}
if (!IsFinal()) {
strReason = "not-final";
return false;
}
// Extremely large transactions with lots of inputs can cost the network
// almost as much to process as they cost the sender in fees, because
// computing signature hashes is O(ninputs*txsize). Limiting transactions
// to MAX_STANDARD_TX_SIZE mitigates CPU exhaustion attacks.
unsigned int sz = this->GetSerializeSize(SER_NETWORK, CTransaction::CURRENT_VERSION);
if (sz >= MAX_STANDARD_TX_SIZE) {
strReason = "tx-size";
return false;
}
BOOST_FOREACH(const CTxIn& txin, vin)
{
// Biggest 'standard' txin is a 3-signature 3-of-3 CHECKMULTISIG
// pay-to-script-hash, which is 3 ~80-byte signatures, 3
// ~65-byte public keys, plus a few script ops.
if (txin.scriptSig.size() > 500 && !txin.scriptSig.IsZerocoinSpend()) {
strReason = "scriptsig-size";
return false;
}
if (txin.scriptSig.IsZerocoinSpend() && txin.scriptSig.size() > 50000){
strReason = "scriptsig-size";
return false;
}
if(!txin.scriptSig.IsZerocoinSpend()){
if (!txin.scriptSig.IsPushOnly()) {
strReason = "scriptsig-not-pushonly";
return false;
}
if (!txin.scriptSig.HasCanonicalPushes()) {
strReason = "non-canonical-push";
return false;
}
}
}
unsigned int nDataOut = 0;
txnouttype whichType;
BOOST_FOREACH(const CTxOut& txout, vout) {
if (!::IsStandard(txout.scriptPubKey, whichType)) {
strReason = "scriptpubkey";
return false;
}
if (whichType == TX_NULL_DATA)
nDataOut++;
else if (txout.IsDust()) {
strReason = "dust";
return false;
}
}
// only one OP_RETURN txout is permitted
if (nDataOut > 1) {
strReason = "multi-op-return";
return false;
}
return true;
}
//
// Check transaction inputs, and make sure any
// pay-to-script-hash transactions are evaluating IsStandard scripts
//
// Why bother? To avoid denial-of-service attacks; an attacker
// can submit a standard HASH... OP_EQUAL transaction,
// which will get accepted into blocks. The redemption
// script can be anything; an attacker could use a very
// expensive-to-check-upon-redemption script like:
// DUP CHECKSIG DROP ... repeated 100 times... OP_1
//
bool CTransaction::AreInputsStandard(CCoinsViewCache& mapInputs) const
{
if (IsCoinBase() || IsZerocoinSpend())
return true; // Coinbases don't use vin normally
for (unsigned int i = 0; i < vin.size(); i++)
{
const CTxOut& prev = GetOutputFor(vin[i], mapInputs);
vector<vector<unsigned char> > vSolutions;
txnouttype whichType;
// get the scriptPubKey corresponding to this input:
const CScript& prevScript = prev.scriptPubKey;
if (!Solver(prevScript, whichType, vSolutions))
return false;
int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
if (nArgsExpected < 0)
return false;
// Transactions with extra stuff in their scriptSigs are
// non-standard. Note that this EvalScript() call will
// be quick, because if there are any operations
// beside "push data" in the scriptSig the
// IsStandard() call returns false
vector<vector<unsigned char> > stack;
if (!EvalScript(stack, vin[i].scriptSig, *this, i, false, 0))
return false;
if (whichType == TX_SCRIPTHASH)
{
if (stack.empty())
return false;
CScript subscript(stack.back().begin(), stack.back().end());
vector<vector<unsigned char> > vSolutions2;
txnouttype whichType2;
if (!Solver(subscript, whichType2, vSolutions2))
return false;
if (whichType2 == TX_SCRIPTHASH)
return false;
int tmpExpected;
tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
if (tmpExpected < 0)
return false;
nArgsExpected += tmpExpected;
}
if (stack.size() != (unsigned int)nArgsExpected)
return false;
}
return true;
}
unsigned int CTransaction::GetLegacySigOpCount() const
{
unsigned int nSigOps = 0;
BOOST_FOREACH(const CTxIn& txin, vin)
{
nSigOps += txin.scriptSig.GetSigOpCount(false);
}
BOOST_FOREACH(const CTxOut& txout, vout)
{
nSigOps += txout.scriptPubKey.GetSigOpCount(false);
}
return nSigOps;
}
int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
{
CBlock blockTmp;
if (pblock == NULL) {
CCoins coins;
if (pcoinsTip->GetCoins(GetHash(), coins)) {
CBlockIndex *pindex = FindBlockByHeight(coins.nHeight);
if (pindex) {
if (!blockTmp.ReadFromDisk(pindex))
return 0;
pblock = &blockTmp;
}
}
}
if (pblock) {
// Update the tx's hashBlock
hashBlock = pblock->GetHash();
// Locate the transaction
for (nIndex = 0; nIndex < (int)pblock->vtx.size(); nIndex++)
if (pblock->vtx[nIndex] == *(CTransaction*)this)
break;
if (nIndex == (int)pblock->vtx.size())
{
vMerkleBranch.clear();
nIndex = -1;
printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
return 0;
}
// Fill in merkle branch
vMerkleBranch = pblock->GetMerkleBranch(nIndex);
}
// Is the tx in a block that's in the main chain
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
if (mi == mapBlockIndex.end())
return 0;
CBlockIndex* pindex = (*mi).second;
if (!pindex || !pindex->IsInMainChain())
return 0;
return pindexBest->nHeight - pindex->nHeight + 1;
}
// zerocoin init
static CBigNum bnTrustedModulus;
bool setParams = bnTrustedModulus.SetHexBool(ZEROCOIN_MODULUS);
// Set up the Zerocoin Params object
static libzerocoin::Params *ZCParams = new libzerocoin::Params(bnTrustedModulus);
bool CTransaction::CheckTransaction(CValidationState &state, uint256 hashTx, bool isVerifyDB, int nHeight) const
{
// Basic checks that don't depend on any context
if (vin.empty())
return state.DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
if (vout.empty())
return state.DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
// Size limits
if (::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
return state.DoS(100, error("CTransaction::CheckTransaction() : size limits failed"));
// Check for negative or overflow output values
int64 nValueOut = 0;
BOOST_FOREACH(const CTxOut& txout, vout)
{
if (txout.nValue < 0)
return state.DoS(100, error("CTransaction::CheckTransaction() : txout.nValue negative"));
if (txout.nValue > MAX_MONEY)
return state.DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
nValueOut += txout.nValue;
if (!MoneyRange(nValueOut))
return state.DoS(100, error("CTransaction::CheckTransaction() : txout total out of range"));
}
// Check for duplicate inputs
set<COutPoint> vInOutPoints;
BOOST_FOREACH(const CTxIn& txin, vin)
{
if (vInOutPoints.count(txin.prevout))
return state.DoS(100, error("CTransaction::CheckTransaction() : duplicate inputs"));
vInOutPoints.insert(txin.prevout);
}
if (IsCoinBase())
{
if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
return state.DoS(100, error("CTransaction::CheckTransaction() : coinbase script size"));
}
else
{
BOOST_FOREACH(const CTxIn& txin, vin) {
if (txin.prevout.IsNull() && !txin.scriptSig.IsZerocoinSpend()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : prevout is null"));
}
}
// Check Mint Zerocoin Transaction
BOOST_FOREACH(const CTxOut txout, vout) {
if (!txout.scriptPubKey.empty() && txout.scriptPubKey.IsZerocoinMint()) {
vector<unsigned char> vchZeroMint;
vchZeroMint.insert(vchZeroMint.end(), txout.scriptPubKey.begin() + 6, txout.scriptPubKey.begin() + txout.scriptPubKey.size());
CBigNum pubCoin;
pubCoin.setvch(vchZeroMint);
libzerocoin::CoinDenomination denomination;
if (txout.nValue == libzerocoin::ZQ_LOVELACE * COIN) {
denomination = libzerocoin::ZQ_LOVELACE;
libzerocoin::PublicCoin checkPubCoin(ZCParams, pubCoin, libzerocoin::ZQ_LOVELACE);
if (!checkPubCoin.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : PubCoin is not validate"));
}
}
else if (txout.nValue == libzerocoin::ZQ_GOLDWASSER * COIN) {
denomination = libzerocoin::ZQ_GOLDWASSER;
libzerocoin::PublicCoin checkPubCoin(ZCParams, pubCoin, libzerocoin::ZQ_GOLDWASSER);
if (!checkPubCoin.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : PubCoin is not validate"));
}
}
else if (txout.nValue == libzerocoin::ZQ_RACKOFF * COIN) {
denomination = libzerocoin::ZQ_RACKOFF;
libzerocoin::PublicCoin checkPubCoin(ZCParams, pubCoin, libzerocoin::ZQ_RACKOFF);
if (!checkPubCoin.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : PubCoin is not validate"));
}
}
else if (txout.nValue == libzerocoin::ZQ_PEDERSEN * COIN) {
denomination = libzerocoin::ZQ_PEDERSEN;
libzerocoin::PublicCoin checkPubCoin(ZCParams, pubCoin, libzerocoin::ZQ_PEDERSEN);
if (!checkPubCoin.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : PubCoin is not validate"));
}
}
else if (txout.nValue == libzerocoin::ZQ_WILLIAMSON * COIN) {
denomination = libzerocoin::ZQ_WILLIAMSON;
libzerocoin::PublicCoin checkPubCoin(ZCParams, pubCoin, libzerocoin::ZQ_WILLIAMSON);
if (!checkPubCoin.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : PubCoin is not validate"));
}
}
else {
return state.DoS(100, error("CTransaction::CheckTransaction() : txout.nValue is not correct"));
}
if (!isVerifyDB) {
// Check the pubCoinValue didn't already store in the wallet
CZerocoinEntry pubCoinTx;
list<CZerocoinEntry> listPubCoin = list<CZerocoinEntry>();
CWalletDB walletdb(pwalletMain->strWalletFile);
walletdb.ListPubCoin(listPubCoin);
bool isAlreadyStored = false;
// CHECKING PROCESS
BOOST_FOREACH(const CZerocoinEntry& pubCoinItem, listPubCoin) {
if (pubCoinItem.value == pubCoin)
{
isAlreadyStored = true;
}
}
// INSERT PROCESS
if (!isAlreadyStored) {
// TX DOES NOT INCLUDE IN DB
//printf("INSERTING\n");
pubCoinTx.id = -1;
pubCoinTx.denomination = denomination;
pubCoinTx.value = pubCoin;
pubCoinTx.randomness = 0;
pubCoinTx.serialNumber = 0;
pubCoinTx.nHeight = -1;
//printf("INSERT PUBCOIN ID: %d\n", pubCoinTx.id);
walletdb.WriteZerocoinEntry(pubCoinTx);
}
}
}
}
// Check Spend Zerocoin Transaction
// (vin.size() == 1 && vin[0].prevout.IsNull() && (vin[0].scriptSig[0] == OP_ZEROCOINSPEND) );
if (IsZerocoinSpend())
{
// Check vOut
// Only one loop, we checked on the format before enter this case
BOOST_FOREACH(const CTxOut txout, vout) {
CZerocoinEntry pubCoinTx;
list<CZerocoinEntry> listPubCoin;
listPubCoin.clear();
if (!isVerifyDB) {
CWalletDB walletdb(pwalletMain->strWalletFile);
walletdb.ListPubCoin(listPubCoin);
listPubCoin.sort(CompHeight);
if (txout.nValue == libzerocoin::ZQ_LOVELACE * COIN)
{
// Check vIn
BOOST_FOREACH(const CTxIn& txin, vin) {
if (txin.scriptSig.IsZerocoinSpend()) {
// Deserialize the CoinSpend intro a fresh object
std::vector<char, zero_after_free_allocator<char> > dataTxIn;
dataTxIn.insert(dataTxIn.end(), txin.scriptSig.begin() + 4, txin.scriptSig.end());
CDataStream serializedCoinSpend(SER_NETWORK, PROTOCOL_VERSION);
serializedCoinSpend.vch = dataTxIn;
libzerocoin::CoinSpend newSpend(ZCParams, serializedCoinSpend);
// Create a new metadata object to contain the hash of the received
// ZEROCOIN_SPEND transaction. If we were a real client we'd actually
// compute the hash of the received transaction here.
libzerocoin::SpendMetaData newMetadata(0, 0);
libzerocoin::Accumulator accumulator(ZCParams, libzerocoin::ZQ_LOVELACE);
libzerocoin::Accumulator accumulatorRev(ZCParams, libzerocoin::ZQ_LOVELACE);
bool passVerify = false;
/////////////////////////////////////////////////////////////////////////////////////////////////
// CHECK PUBCOIN ID
int pubcoinId = txin.nSequence;
if (pubcoinId < 1 && pubcoinId == INT_MAX) { // IT BEGINS WITH 1
return state.DoS(100, error("CTransaction::CheckTransaction() : Error: nSequence is not correct format"));
}
// VERIFY COINSPEND TX
int countPubcoin = 0;
BOOST_FOREACH(const CZerocoinEntry& pubCoinItem, listPubCoin) {
//printf("denomination = %d, id = %d, pubcoinId = %d height = %d\n", pubCoinItem.denomination, pubCoinItem.id, pubcoinId, pubCoinItem.nHeight);
if (pubCoinItem.denomination == libzerocoin::ZQ_LOVELACE && pubCoinItem.id == pubcoinId && pubCoinItem.nHeight != -1) {
//printf("## denomination = %d, id = %d, pubcoinId = %d height = %d\n", pubCoinItem.denomination, pubCoinItem.id, pubcoinId, pubCoinItem.nHeight);
libzerocoin::PublicCoin pubCoinTemp(ZCParams, pubCoinItem.value, libzerocoin::ZQ_LOVELACE);
if (!pubCoinTemp.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : Error: Public Coin for Accumulator is not valid !!!"));
}
countPubcoin++;
accumulator += pubCoinTemp;
if (countPubcoin >= 2) { // MINIMUM REQUIREMENT IS 2 PUBCOINS
if (newSpend.Verify(accumulator, newMetadata)) {
//printf("COIN SPEND TX DID VERIFY!\n");
passVerify = true;
break;
}
}
}
}
if(!passVerify){
int countPubcoin = 0;
//printf("PROCESS REVERSE\n");
BOOST_REVERSE_FOREACH(const CZerocoinEntry& pubCoinItem, listPubCoin) {
//printf("denomination = %d, id = %d, pubcoinId = %d height = %d\n", pubCoinItem.denomination, pubCoinItem.id, pubcoinId, pubCoinItem.nHeight);
if (pubCoinItem.denomination == libzerocoin::ZQ_LOVELACE && pubCoinItem.id == pubcoinId && pubCoinItem.nHeight != -1) {
//printf("## denomination = %d, id = %d, pubcoinId = %d height = %d\n", pubCoinItem.denomination, pubCoinItem.id, pubcoinId, pubCoinItem.nHeight);
libzerocoin::PublicCoin pubCoinTemp(ZCParams, pubCoinItem.value, libzerocoin::ZQ_LOVELACE);
if (!pubCoinTemp.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : Error: Public Coin for Accumulator is not valid !!!"));
}
countPubcoin++;
accumulatorRev += pubCoinTemp;
if (countPubcoin >= 2) { // MINIMUM REQUIREMENT IS 2 PUBCOINS
if (newSpend.Verify(accumulatorRev, newMetadata)) {
//printf("COIN SPEND TX DID VERIFY!\n");
passVerify = true;
break;
}
}
}
}
}
if (passVerify) {
// Pull the serial number out of the CoinSpend object. If we
// were a real Zerocoin client we would now check that the serial number
// has not been spent before (in another ZEROCOIN_SPEND) transaction.
// The serial number is stored as a Bignum.
if (!isVerifyDB) {
// chceck already store
bool isAlreadyStored = false;
CBigNum serialNumber = newSpend.getCoinSerialNumber();
CWalletDB walletdb(pwalletMain->strWalletFile);
std::list<CZerocoinSpendEntry> listCoinSpendSerial;
walletdb.ListCoinSpendSerial(listCoinSpendSerial);
BOOST_FOREACH(const CZerocoinSpendEntry& item, listCoinSpendSerial) {
if (item.coinSerial == serialNumber
&& item.denomination == libzerocoin::ZQ_LOVELACE
&& item.id == pubcoinId
&& item.hashTx != hashTx) {
return state.DoS(100, error("CTransaction::CheckTransaction() : The CoinSpend serial has been used"));
}
else if (item.coinSerial == serialNumber
&& item.hashTx == hashTx
&& item.denomination == libzerocoin::ZQ_LOVELACE
&& item.id == pubcoinId
&& item.pubCoin != 0) {
// UPDATING PROCESS
BOOST_FOREACH(const CZerocoinEntry& pubCoinItem, listPubCoin) {
if (pubCoinItem.value == item.pubCoin) {
pubCoinTx.nHeight = pubCoinItem.nHeight;
pubCoinTx.denomination = pubCoinItem.denomination;
// UPDATE FOR INDICATE IT HAS BEEN USED
pubCoinTx.IsUsed = true;
// REMOVE RANDOMNESS FOR PREVENT FUTURE USE
// pubCoinTx.randomness = 0;
// pubCoinTx.serialNumber = 0;
pubCoinTx.value = pubCoinItem.value;
pubCoinTx.id = pubCoinItem.id;
walletdb.WriteZerocoinEntry(pubCoinTx);
// Update UI wallet
pwalletMain->NotifyZerocoinChanged(pwalletMain, pubCoinItem.value.GetHex(), "Used", CT_UPDATED);
break;
}
}
isAlreadyStored = true;
break;
}
else if (item.coinSerial == serialNumber
&& item.hashTx == hashTx
&& item.denomination == libzerocoin::ZQ_LOVELACE
&& item.id == pubcoinId
&& item.pubCoin == 0) {
isAlreadyStored = true;
break;
}
}
if (!isAlreadyStored) {
// INSERTING COINSPEND TO DB
CZerocoinSpendEntry zccoinSpend;
zccoinSpend.coinSerial = serialNumber;
zccoinSpend.hashTx = hashTx;
zccoinSpend.pubCoin = 0;
zccoinSpend.id = pubcoinId;
zccoinSpend.denomination = libzerocoin::ZQ_LOVELACE;
walletdb.WriteCoinSpendSerialEntry(zccoinSpend);
}
}
}
else {
//printf("isVerifyDB = %d\n", isVerifyDB);
return state.DoS(100, error("CTransaction::CheckTransaction() : COINSPEND TX IN ZQ_LOVELACE DID NOT VERIFY!"));
}
/////////////////////////////////////////////////////////////////////////////////////////////////
}
}
}
else if (txout.nValue == libzerocoin::ZQ_GOLDWASSER * COIN) {
// Check vIn
BOOST_FOREACH(const CTxIn& txin, vin) {
if (txin.scriptSig.IsZerocoinSpend()) {
// Deserialize the CoinSpend intro a fresh object
std::vector<char, zero_after_free_allocator<char> > dataTxIn;
dataTxIn.insert(dataTxIn.end(), txin.scriptSig.begin() + 4, txin.scriptSig.end());
CDataStream serializedCoinSpend(SER_NETWORK, PROTOCOL_VERSION);
serializedCoinSpend.vch = dataTxIn;
libzerocoin::CoinSpend newSpend(ZCParams, serializedCoinSpend);
// Create a new metadata object to contain the hash of the received
// ZEROCOIN_SPEND transaction. If we were a real client we'd actually
// compute the hash of the received transaction here.
libzerocoin::SpendMetaData newMetadata(0, 0);
libzerocoin::Accumulator accumulator(ZCParams, libzerocoin::ZQ_GOLDWASSER);
libzerocoin::Accumulator accumulatorRev(ZCParams, libzerocoin::ZQ_GOLDWASSER);
bool passVerify = false;
/////////////////////////////////////////////////////////////////////////////////////////////////
// CHECK PUBCOIN ID
unsigned int pubcoinId = txin.nSequence;
if (pubcoinId < 1) { // IT BEGINS WITH 1
return state.DoS(100, error("CTransaction::CheckTransaction() : Error: nSequence is not correct format"));
}
int pubcoinId_s = (int)pubcoinId;
// VERIFY COINSPEND TX
unsigned int countPubcoin = 0;
BOOST_FOREACH(const CZerocoinEntry& pubCoinItem, listPubCoin) {
if (pubCoinItem.denomination == libzerocoin::ZQ_GOLDWASSER && pubCoinItem.id == pubcoinId_s && pubCoinItem.nHeight != -1) {
libzerocoin::PublicCoin pubCoinTemp(ZCParams, pubCoinItem.value, libzerocoin::ZQ_GOLDWASSER);
if (!pubCoinTemp.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : Error: Public Coin for Accumulator is not valid !!!"));
}
countPubcoin++;
accumulator += pubCoinTemp;
if (countPubcoin >= 2) { // MINIMUM REQUIREMENT IS 2 PUBCOINS
if (newSpend.Verify(accumulator, newMetadata)) {
//printf("COIN SPEND TX DID VERIFY!\n");
passVerify = true;
break;
}
}
}
}
if(!passVerify){
int countPubcoin = 0;
//printf("PROCESS REVERSE\n");
BOOST_REVERSE_FOREACH(const CZerocoinEntry& pubCoinItem, listPubCoin) {
//printf("pubCoinItem.denomination = %d, pubCoinItem.id = %d, pubcoinId = %d \n", pubCoinItem.denomination, pubCoinItem.id, pubcoinId);
if (pubCoinItem.denomination == libzerocoin::ZQ_GOLDWASSER && pubCoinItem.id == pubcoinId_s && pubCoinItem.nHeight != -1) {
//printf("## denomination = %d, id = %d, pubcoinId = %d height = %d\n", pubCoinItem.denomination, pubCoinItem.id, pubcoinId_s, pubCoinItem.nHeight);
libzerocoin::PublicCoin pubCoinTemp(ZCParams, pubCoinItem.value, libzerocoin::ZQ_GOLDWASSER);
if (!pubCoinTemp.validate()) {
return state.DoS(100, error("CTransaction::CheckTransaction() : Error: Public Coin for Accumulator is not valid !!!"));
}
countPubcoin++;
accumulatorRev += pubCoinTemp;
if (countPubcoin >= 2) { // MINIMUM REQUIREMENT IS 2 PUBCOINS
if (newSpend.Verify(accumulatorRev, newMetadata)) {
//printf("COIN SPEND TX DID VERIFY!\n");
passVerify = true;
break;
}
}
}
}
}
if (passVerify) {
// Pull the serial number out of the CoinSpend object. If we
// were a real Zerocoin client we would now check that the serial number
// has not been spent before (in another ZEROCOIN_SPEND) transaction.
// The serial number is stored as a Bignum.
if (!isVerifyDB) {
// chceck already store
bool isAlreadyStored = false;
CBigNum serialNumber = newSpend.getCoinSerialNumber();
CWalletDB walletdb(pwalletMain->strWalletFile);