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lbrycrd/main.cpp
s_nakamoto 2939cab06d update fSpent flag on wallet transactions if they're seen spent in case copy of wallet.dat was used elsewhere or restored from backup, 
better error dialog box if try to spend already spent coins, 
got rid of unused notebook with only one tab on main dialog, 
nicer looking About dialog, 
resize About dialog better on linux
2010-02-03 22:58:40 +00:00

2974 lines
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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#include "headers.h"
#include "sha.h"
//
// Global state
//
CCriticalSection cs_main;
map<uint256, CTransaction> mapTransactions;
CCriticalSection cs_mapTransactions;
unsigned int nTransactionsUpdated = 0;
map<COutPoint, CInPoint> mapNextTx;
map<uint256, CBlockIndex*> mapBlockIndex;
const uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
CBlockIndex* pindexGenesisBlock = NULL;
int nBestHeight = -1;
uint256 hashBestChain = 0;
CBlockIndex* pindexBest = NULL;
map<uint256, CBlock*> mapOrphanBlocks;
multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
map<uint256, CDataStream*> mapOrphanTransactions;
multimap<uint256, CDataStream*> mapOrphanTransactionsByPrev;
map<uint256, CWalletTx> mapWallet;
vector<uint256> vWalletUpdated;
CCriticalSection cs_mapWallet;
map<vector<unsigned char>, CPrivKey> mapKeys;
map<uint160, vector<unsigned char> > mapPubKeys;
CCriticalSection cs_mapKeys;
CKey keyUser;
map<uint256, int> mapRequestCount;
CCriticalSection cs_mapRequestCount;
// Settings
int fGenerateBitcoins = false;
int64 nTransactionFee = 0;
CAddress addrIncoming;
int fLimitProcessors = false;
int nLimitProcessors = 1;
//////////////////////////////////////////////////////////////////////////////
//
// mapKeys
//
bool AddKey(const CKey& key)
{
CRITICAL_BLOCK(cs_mapKeys)
{
mapKeys[key.GetPubKey()] = key.GetPrivKey();
mapPubKeys[Hash160(key.GetPubKey())] = key.GetPubKey();
}
return CWalletDB().WriteKey(key.GetPubKey(), key.GetPrivKey());
}
vector<unsigned char> GenerateNewKey()
{
CKey key;
key.MakeNewKey();
if (!AddKey(key))
throw runtime_error("GenerateNewKey() : AddKey failed\n");
return key.GetPubKey();
}
//////////////////////////////////////////////////////////////////////////////
//
// mapWallet
//
bool AddToWallet(const CWalletTx& wtxIn)
{
uint256 hash = wtxIn.GetHash();
CRITICAL_BLOCK(cs_mapWallet)
{
// Inserts only if not already there, returns tx inserted or tx found
pair<map<uint256, CWalletTx>::iterator, bool> ret = mapWallet.insert(make_pair(hash, wtxIn));
CWalletTx& wtx = (*ret.first).second;
bool fInsertedNew = ret.second;
if (fInsertedNew)
wtx.nTimeReceived = GetAdjustedTime();
bool fUpdated = false;
if (!fInsertedNew)
{
// Merge
if (wtxIn.hashBlock != 0 && wtxIn.hashBlock != wtx.hashBlock)
{
wtx.hashBlock = wtxIn.hashBlock;
fUpdated = true;
}
if (wtxIn.nIndex != -1 && (wtxIn.vMerkleBranch != wtx.vMerkleBranch || wtxIn.nIndex != wtx.nIndex))
{
wtx.vMerkleBranch = wtxIn.vMerkleBranch;
wtx.nIndex = wtxIn.nIndex;
fUpdated = true;
}
if (wtxIn.fFromMe && wtxIn.fFromMe != wtx.fFromMe)
{
wtx.fFromMe = wtxIn.fFromMe;
fUpdated = true;
}
if (wtxIn.fSpent && wtxIn.fSpent != wtx.fSpent)
{
wtx.fSpent = wtxIn.fSpent;
fUpdated = true;
}
}
//// debug print
printf("AddToWallet %s %s%s\n", wtxIn.GetHash().ToString().substr(0,6).c_str(), (fInsertedNew ? "new" : ""), (fUpdated ? "update" : ""));
// Write to disk
if (fInsertedNew || fUpdated)
if (!wtx.WriteToDisk())
return false;
// Notify UI
vWalletUpdated.push_back(hash);
}
// Refresh UI
MainFrameRepaint();
return true;
}
bool AddToWalletIfMine(const CTransaction& tx, const CBlock* pblock)
{
if (tx.IsMine() || mapWallet.count(tx.GetHash()))
{
CWalletTx wtx(tx);
// Get merkle branch if transaction was found in a block
if (pblock)
wtx.SetMerkleBranch(pblock);
return AddToWallet(wtx);
}
return true;
}
bool EraseFromWallet(uint256 hash)
{
CRITICAL_BLOCK(cs_mapWallet)
{
if (mapWallet.erase(hash))
CWalletDB().EraseTx(hash);
}
return true;
}
void WalletUpdateSpent(const COutPoint& prevout)
{
// Anytime a signature is successfully verified, it's proof the outpoint is spent.
// Update the wallet spent flag if it doesn't know due to wallet.dat being
// restored from backup or the user making copies of wallet.dat.
CRITICAL_BLOCK(cs_mapWallet)
{
map<uint256, CWalletTx>::iterator mi = mapWallet.find(prevout.hash);
if (mi != mapWallet.end())
{
CWalletTx& wtx = (*mi).second;
if (!wtx.fSpent && wtx.vout[prevout.n].IsMine())
{
printf("WalletUpdateSpent found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
wtx.fSpent = true;
wtx.WriteToDisk();
vWalletUpdated.push_back(prevout.hash);
}
}
}
}
//////////////////////////////////////////////////////////////////////////////
//
// mapOrphanTransactions
//
void AddOrphanTx(const CDataStream& vMsg)
{
CTransaction tx;
CDataStream(vMsg) >> tx;
uint256 hash = tx.GetHash();
if (mapOrphanTransactions.count(hash))
return;
CDataStream* pvMsg = mapOrphanTransactions[hash] = new CDataStream(vMsg);
foreach(const CTxIn& txin, tx.vin)
mapOrphanTransactionsByPrev.insert(make_pair(txin.prevout.hash, pvMsg));
}
void EraseOrphanTx(uint256 hash)
{
if (!mapOrphanTransactions.count(hash))
return;
const CDataStream* pvMsg = mapOrphanTransactions[hash];
CTransaction tx;
CDataStream(*pvMsg) >> tx;
foreach(const CTxIn& txin, tx.vin)
{
for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(txin.prevout.hash);
mi != mapOrphanTransactionsByPrev.upper_bound(txin.prevout.hash);)
{
if ((*mi).second == pvMsg)
mapOrphanTransactionsByPrev.erase(mi++);
else
mi++;
}
}
delete pvMsg;
mapOrphanTransactions.erase(hash);
}
//////////////////////////////////////////////////////////////////////////////
//
// CTransaction
//
bool CTxIn::IsMine() const
{
CRITICAL_BLOCK(cs_mapWallet)
{
map<uint256, CWalletTx>::iterator mi = mapWallet.find(prevout.hash);
if (mi != mapWallet.end())
{
const CWalletTx& prev = (*mi).second;
if (prevout.n < prev.vout.size())
if (prev.vout[prevout.n].IsMine())
return true;
}
}
return false;
}
int64 CTxIn::GetDebit() const
{
CRITICAL_BLOCK(cs_mapWallet)
{
map<uint256, CWalletTx>::iterator mi = mapWallet.find(prevout.hash);
if (mi != mapWallet.end())
{
const CWalletTx& prev = (*mi).second;
if (prevout.n < prev.vout.size())
if (prev.vout[prevout.n].IsMine())
return prev.vout[prevout.n].nValue;
}
}
return 0;
}
int64 CWalletTx::GetTxTime() const
{
if (!fTimeReceivedIsTxTime && hashBlock != 0)
{
// If we did not receive the transaction directly, we rely on the block's
// time to figure out when it happened. We use the median over a range
// of blocks to try to filter out inaccurate block times.
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
if (mi != mapBlockIndex.end())
{
CBlockIndex* pindex = (*mi).second;
if (pindex)
return pindex->GetMedianTime();
}
}
return nTimeReceived;
}
int CWalletTx::GetRequestCount() const
{
// Returns -1 if it wasn't being tracked
int nRequests = -1;
CRITICAL_BLOCK(cs_mapRequestCount)
{
if (IsCoinBase())
{
// Generated block
if (hashBlock != 0)
{
map<uint256, int>::iterator mi = mapRequestCount.find(hashBlock);
if (mi != mapRequestCount.end())
nRequests = (*mi).second;
}
}
else
{
// Did anyone request this transaction?
map<uint256, int>::iterator mi = mapRequestCount.find(GetHash());
if (mi != mapRequestCount.end())
{
nRequests = (*mi).second;
// How about the block it's in?
if (nRequests == 0 && hashBlock != 0)
{
map<uint256, int>::iterator mi = mapRequestCount.find(hashBlock);
if (mi != mapRequestCount.end())
nRequests = (*mi).second;
else
nRequests = 1; // If it's in someone else's block it must have got out
}
}
}
}
return nRequests;
}
int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
{
if (fClient)
{
if (hashBlock == 0)
return 0;
}
else
{
CBlock blockTmp;
if (pblock == NULL)
{
// Load the block this tx is in
CTxIndex txindex;
if (!CTxDB("r").ReadTxIndex(GetHash(), txindex))
return 0;
if (!blockTmp.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos))
return 0;
pblock = &blockTmp;
}
// Update the tx's hashBlock
hashBlock = pblock->GetHash();
// Locate the transaction
for (nIndex = 0; nIndex < pblock->vtx.size(); nIndex++)
if (pblock->vtx[nIndex] == *(CTransaction*)this)
break;
if (nIndex == 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;
}
void CWalletTx::AddSupportingTransactions(CTxDB& txdb)
{
vtxPrev.clear();
const int COPY_DEPTH = 3;
if (SetMerkleBranch() < COPY_DEPTH)
{
vector<uint256> vWorkQueue;
foreach(const CTxIn& txin, vin)
vWorkQueue.push_back(txin.prevout.hash);
// This critsect is OK because txdb is already open
CRITICAL_BLOCK(cs_mapWallet)
{
map<uint256, const CMerkleTx*> mapWalletPrev;
set<uint256> setAlreadyDone;
for (int i = 0; i < vWorkQueue.size(); i++)
{
uint256 hash = vWorkQueue[i];
if (setAlreadyDone.count(hash))
continue;
setAlreadyDone.insert(hash);
CMerkleTx tx;
if (mapWallet.count(hash))
{
tx = mapWallet[hash];
foreach(const CMerkleTx& txWalletPrev, mapWallet[hash].vtxPrev)
mapWalletPrev[txWalletPrev.GetHash()] = &txWalletPrev;
}
else if (mapWalletPrev.count(hash))
{
tx = *mapWalletPrev[hash];
}
else if (!fClient && txdb.ReadDiskTx(hash, tx))
{
;
}
else
{
printf("ERROR: AddSupportingTransactions() : unsupported transaction\n");
continue;
}
int nDepth = tx.SetMerkleBranch();
vtxPrev.push_back(tx);
if (nDepth < COPY_DEPTH)
foreach(const CTxIn& txin, tx.vin)
vWorkQueue.push_back(txin.prevout.hash);
}
}
}
reverse(vtxPrev.begin(), vtxPrev.end());
}
bool CTransaction::AcceptTransaction(CTxDB& txdb, bool fCheckInputs, bool* pfMissingInputs)
{
if (pfMissingInputs)
*pfMissingInputs = false;
// Coinbase is only valid in a block, not as a loose transaction
if (IsCoinBase())
return error("AcceptTransaction() : coinbase as individual tx");
if (!CheckTransaction())
return error("AcceptTransaction() : CheckTransaction failed");
// To help v0.1.5 clients who would see it as negative number. please delete this later.
if (nLockTime > INT_MAX)
return error("AcceptTransaction() : not accepting nLockTime beyond 2038");
// Do we already have it?
uint256 hash = GetHash();
CRITICAL_BLOCK(cs_mapTransactions)
if (mapTransactions.count(hash))
return false;
if (fCheckInputs)
if (txdb.ContainsTx(hash))
return false;
// Check for conflicts with in-memory transactions
CTransaction* ptxOld = NULL;
for (int i = 0; i < vin.size(); i++)
{
COutPoint outpoint = vin[i].prevout;
if (mapNextTx.count(outpoint))
{
// Allow replacing with a newer version of the same transaction
if (i != 0)
return false;
ptxOld = mapNextTx[outpoint].ptx;
if (!IsNewerThan(*ptxOld))
return false;
for (int i = 0; i < vin.size(); i++)
{
COutPoint outpoint = vin[i].prevout;
if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
return false;
}
break;
}
}
// Check against previous transactions
map<uint256, CTxIndex> mapUnused;
int64 nFees = 0;
if (fCheckInputs && !ConnectInputs(txdb, mapUnused, CDiskTxPos(1,1,1), 0, nFees, false, false))
{
if (pfMissingInputs)
*pfMissingInputs = true;
return error("AcceptTransaction() : ConnectInputs failed %s", hash.ToString().substr(0,6).c_str());
}
// Store transaction in memory
CRITICAL_BLOCK(cs_mapTransactions)
{
if (ptxOld)
{
printf("mapTransaction.erase(%s) replacing with new version\n", ptxOld->GetHash().ToString().c_str());
mapTransactions.erase(ptxOld->GetHash());
}
AddToMemoryPool();
}
///// are we sure this is ok when loading transactions or restoring block txes
// If updated, erase old tx from wallet
if (ptxOld)
EraseFromWallet(ptxOld->GetHash());
printf("AcceptTransaction(): accepted %s\n", hash.ToString().substr(0,6).c_str());
return true;
}
bool CTransaction::AddToMemoryPool()
{
// Add to memory pool without checking anything. Don't call this directly,
// call AcceptTransaction to properly check the transaction first.
CRITICAL_BLOCK(cs_mapTransactions)
{
uint256 hash = GetHash();
mapTransactions[hash] = *this;
for (int i = 0; i < vin.size(); i++)
mapNextTx[vin[i].prevout] = CInPoint(&mapTransactions[hash], i);
nTransactionsUpdated++;
}
return true;
}
bool CTransaction::RemoveFromMemoryPool()
{
// Remove transaction from memory pool
CRITICAL_BLOCK(cs_mapTransactions)
{
foreach(const CTxIn& txin, vin)
mapNextTx.erase(txin.prevout);
mapTransactions.erase(GetHash());
nTransactionsUpdated++;
}
return true;
}
int CMerkleTx::GetDepthInMainChain() const
{
if (hashBlock == 0 || nIndex == -1)
return 0;
// Find the block it claims to be in
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
if (mi == mapBlockIndex.end())
return 0;
CBlockIndex* pindex = (*mi).second;
if (!pindex || !pindex->IsInMainChain())
return 0;
// Make sure the merkle branch connects to this block
if (!fMerkleVerified)
{
if (CBlock::CheckMerkleBranch(GetHash(), vMerkleBranch, nIndex) != pindex->hashMerkleRoot)
return 0;
fMerkleVerified = true;
}
return pindexBest->nHeight - pindex->nHeight + 1;
}
int CMerkleTx::GetBlocksToMaturity() const
{
if (!IsCoinBase())
return 0;
return max(0, (COINBASE_MATURITY+20) - GetDepthInMainChain());
}
bool CMerkleTx::AcceptTransaction(CTxDB& txdb, bool fCheckInputs)
{
if (fClient)
{
if (!IsInMainChain() && !ClientConnectInputs())
return false;
return CTransaction::AcceptTransaction(txdb, false);
}
else
{
return CTransaction::AcceptTransaction(txdb, fCheckInputs);
}
}
bool CWalletTx::AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs)
{
CRITICAL_BLOCK(cs_mapTransactions)
{
foreach(CMerkleTx& tx, vtxPrev)
{
if (!tx.IsCoinBase())
{
uint256 hash = tx.GetHash();
if (!mapTransactions.count(hash) && !txdb.ContainsTx(hash))
tx.AcceptTransaction(txdb, fCheckInputs);
}
}
if (!IsCoinBase())
return AcceptTransaction(txdb, fCheckInputs);
}
return true;
}
void ReacceptWalletTransactions()
{
CTxDB txdb("r");
CRITICAL_BLOCK(cs_mapWallet)
{
foreach(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
{
CWalletTx& wtx = item.second;
if (wtx.fSpent && wtx.IsCoinBase())
continue;
CTxIndex txindex;
if (txdb.ReadTxIndex(wtx.GetHash(), txindex))
{
// Update fSpent if a tx got spent somewhere else by a copy of wallet.dat
if (!wtx.fSpent)
{
if (txindex.vSpent.size() != wtx.vout.size())
{
printf("ERROR: ReacceptWalletTransactions() : txindex.vSpent.size() %d != wtx.vout.size() %d\n", txindex.vSpent.size(), wtx.vout.size());
continue;
}
for (int i = 0; i < txindex.vSpent.size(); i++)
{
if (!txindex.vSpent[i].IsNull() && wtx.vout[i].IsMine())
{
printf("ReacceptWalletTransactions found spent coin %sbc %s\n", FormatMoney(wtx.GetCredit()).c_str(), wtx.GetHash().ToString().c_str());
wtx.fSpent = true;
wtx.WriteToDisk();
break;
}
}
}
}
else
{
// Reaccept any txes of ours that aren't already in a block
if (!wtx.IsCoinBase())
wtx.AcceptWalletTransaction(txdb, false);
}
}
}
}
void CWalletTx::RelayWalletTransaction(CTxDB& txdb)
{
foreach(const CMerkleTx& tx, vtxPrev)
{
if (!tx.IsCoinBase())
{
uint256 hash = tx.GetHash();
if (!txdb.ContainsTx(hash))
RelayMessage(CInv(MSG_TX, hash), (CTransaction)tx);
}
}
if (!IsCoinBase())
{
uint256 hash = GetHash();
if (!txdb.ContainsTx(hash))
{
printf("Relaying wtx %s\n", hash.ToString().substr(0,6).c_str());
RelayMessage(CInv(MSG_TX, hash), (CTransaction)*this);
}
}
}
void RelayWalletTransactions()
{
static int64 nLastTime;
if (GetTime() - nLastTime < 10 * 60)
return;
nLastTime = GetTime();
// Rebroadcast any of our txes that aren't in a block yet
printf("RelayWalletTransactions()\n");
CTxDB txdb("r");
CRITICAL_BLOCK(cs_mapWallet)
{
// Sort them in chronological order
multimap<unsigned int, CWalletTx*> mapSorted;
foreach(PAIRTYPE(const uint256, CWalletTx)& item, mapWallet)
{
CWalletTx& wtx = item.second;
mapSorted.insert(make_pair(wtx.nTimeReceived, &wtx));
}
foreach(PAIRTYPE(const unsigned int, CWalletTx*)& item, mapSorted)
{
CWalletTx& wtx = *item.second;
wtx.RelayWalletTransaction(txdb);
}
}
}
//////////////////////////////////////////////////////////////////////////////
//
// CBlock and CBlockIndex
//
bool CBlock::ReadFromDisk(const CBlockIndex* pblockindex, bool fReadTransactions)
{
return ReadFromDisk(pblockindex->nFile, pblockindex->nBlockPos, fReadTransactions);
}
uint256 GetOrphanRoot(const CBlock* pblock)
{
// Work back to the first block in the orphan chain
while (mapOrphanBlocks.count(pblock->hashPrevBlock))
pblock = mapOrphanBlocks[pblock->hashPrevBlock];
return pblock->GetHash();
}
int64 CBlock::GetBlockValue(int64 nFees) const
{
int64 nSubsidy = 50 * COIN;
// Subsidy is cut in half every 4 years
nSubsidy >>= (nBestHeight / 210000);
return nSubsidy + nFees;
}
unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast)
{
const unsigned int nTargetTimespan = 14 * 24 * 60 * 60; // two weeks
const unsigned int nTargetSpacing = 10 * 60;
const unsigned int nInterval = nTargetTimespan / nTargetSpacing;
// Genesis block
if (pindexLast == NULL)
return bnProofOfWorkLimit.GetCompact();
// Only change once per interval
if ((pindexLast->nHeight+1) % nInterval != 0)
return pindexLast->nBits;
// Go back by what we want to be 14 days worth of blocks
const CBlockIndex* pindexFirst = pindexLast;
for (int i = 0; pindexFirst && i < nInterval-1; i++)
pindexFirst = pindexFirst->pprev;
assert(pindexFirst);
// Limit adjustment step
unsigned int nActualTimespan = pindexLast->nTime - pindexFirst->nTime;
printf(" nActualTimespan = %d before bounds\n", nActualTimespan);
if (nActualTimespan < nTargetTimespan/4)
nActualTimespan = nTargetTimespan/4;
if (nActualTimespan > nTargetTimespan*4)
nActualTimespan = nTargetTimespan*4;
// Retarget
CBigNum bnNew;
bnNew.SetCompact(pindexLast->nBits);
bnNew *= nActualTimespan;
bnNew /= nTargetTimespan;
if (bnNew > bnProofOfWorkLimit)
bnNew = bnProofOfWorkLimit;
/// debug print
printf("GetNextWorkRequired RETARGET\n");
printf("nTargetTimespan = %d nActualTimespan = %d\n", nTargetTimespan, nActualTimespan);
printf("Before: %08x %s\n", pindexLast->nBits, CBigNum().SetCompact(pindexLast->nBits).getuint256().ToString().c_str());
printf("After: %08x %s\n", bnNew.GetCompact(), bnNew.getuint256().ToString().c_str());
return bnNew.GetCompact();
}
bool CTransaction::DisconnectInputs(CTxDB& txdb)
{
// Relinquish previous transactions' spent pointers
if (!IsCoinBase())
{
foreach(const CTxIn& txin, vin)
{
COutPoint prevout = txin.prevout;
// Get prev txindex from disk
CTxIndex txindex;
if (!txdb.ReadTxIndex(prevout.hash, txindex))
return error("DisconnectInputs() : ReadTxIndex failed");
if (prevout.n >= txindex.vSpent.size())
return error("DisconnectInputs() : prevout.n out of range");
// Mark outpoint as not spent
txindex.vSpent[prevout.n].SetNull();
// Write back
txdb.UpdateTxIndex(prevout.hash, txindex);
}
}
// Remove transaction from index
if (!txdb.EraseTxIndex(*this))
return error("DisconnectInputs() : EraseTxPos failed");
return true;
}
bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx, int nHeight, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee)
{
// Take over previous transactions' spent pointers
if (!IsCoinBase())
{
int64 nValueIn = 0;
for (int i = 0; i < vin.size(); i++)
{
COutPoint prevout = vin[i].prevout;
// Read txindex
CTxIndex txindex;
bool fFound = true;
if (fMiner && mapTestPool.count(prevout.hash))
{
// Get txindex from current proposed changes
txindex = mapTestPool[prevout.hash];
}
else
{
// Read txindex from txdb
fFound = txdb.ReadTxIndex(prevout.hash, txindex);
}
if (!fFound && (fBlock || fMiner))
return fMiner ? false : error("ConnectInputs() : %s prev tx %s index entry not found", GetHash().ToString().substr(0,6).c_str(), prevout.hash.ToString().substr(0,6).c_str());
// Read txPrev
CTransaction txPrev;
if (!fFound || txindex.pos == CDiskTxPos(1,1,1))
{
// Get prev tx from single transactions in memory
CRITICAL_BLOCK(cs_mapTransactions)
{
if (!mapTransactions.count(prevout.hash))
return error("ConnectInputs() : %s mapTransactions prev not found %s", GetHash().ToString().substr(0,6).c_str(), prevout.hash.ToString().substr(0,6).c_str());
txPrev = mapTransactions[prevout.hash];
}
if (!fFound)
txindex.vSpent.resize(txPrev.vout.size());
}
else
{
// Get prev tx from disk
if (!txPrev.ReadFromDisk(txindex.pos))
return error("ConnectInputs() : %s ReadFromDisk prev tx %s failed", GetHash().ToString().substr(0,6).c_str(), prevout.hash.ToString().substr(0,6).c_str());
}
if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
return error("ConnectInputs() : %s prevout.n out of range %d %d %d prev tx %s\n%s", GetHash().ToString().substr(0,6).c_str(), prevout.n, txPrev.vout.size(), txindex.vSpent.size(), prevout.hash.ToString().substr(0,6).c_str(), txPrev.ToString().c_str());
// If prev is coinbase, check that it's matured
if (txPrev.IsCoinBase())
for (CBlockIndex* pindex = pindexBest; pindex && nBestHeight - pindex->nHeight < COINBASE_MATURITY-1; pindex = pindex->pprev)
if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
return error("ConnectInputs() : tried to spend coinbase at depth %d", nBestHeight - pindex->nHeight);
// Verify signature
if (!VerifySignature(txPrev, *this, i))
return error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,6).c_str());
// Check for conflicts
if (!txindex.vSpent[prevout.n].IsNull())
return fMiner ? false : error("ConnectInputs() : %s prev tx already used at %s", GetHash().ToString().substr(0,6).c_str(), txindex.vSpent[prevout.n].ToString().c_str());
// Mark outpoints as spent
txindex.vSpent[prevout.n] = posThisTx;
// Write back
if (fBlock)
txdb.UpdateTxIndex(prevout.hash, txindex);
else if (fMiner)
mapTestPool[prevout.hash] = txindex;
nValueIn += txPrev.vout[prevout.n].nValue;
}
// Tally transaction fees
int64 nTxFee = nValueIn - GetValueOut();
if (nTxFee < 0)
return error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,6).c_str());
if (nTxFee < nMinFee)
return false;
nFees += nTxFee;
}
if (fBlock)
{
// Add transaction to disk index
if (!txdb.AddTxIndex(*this, posThisTx, nHeight))
return error("ConnectInputs() : AddTxPos failed");
}
else if (fMiner)
{
// Add transaction to test pool
mapTestPool[GetHash()] = CTxIndex(CDiskTxPos(1,1,1), vout.size());
}
return true;
}
bool CTransaction::ClientConnectInputs()
{
if (IsCoinBase())
return false;
// Take over previous transactions' spent pointers
CRITICAL_BLOCK(cs_mapTransactions)
{
int64 nValueIn = 0;
for (int i = 0; i < vin.size(); i++)
{
// Get prev tx from single transactions in memory
COutPoint prevout = vin[i].prevout;
if (!mapTransactions.count(prevout.hash))
return false;
CTransaction& txPrev = mapTransactions[prevout.hash];
if (prevout.n >= txPrev.vout.size())
return false;
// Verify signature
if (!VerifySignature(txPrev, *this, i))
return error("ConnectInputs() : VerifySignature failed");
///// this is redundant with the mapNextTx stuff, not sure which I want to get rid of
///// this has to go away now that posNext is gone
// // Check for conflicts
// if (!txPrev.vout[prevout.n].posNext.IsNull())
// return error("ConnectInputs() : prev tx already used");
//
// // Flag outpoints as used
// txPrev.vout[prevout.n].posNext = posThisTx;
nValueIn += txPrev.vout[prevout.n].nValue;
}
if (GetValueOut() > nValueIn)
return false;
}
return true;
}
bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
{
// Disconnect in reverse order
for (int i = vtx.size()-1; i >= 0; i--)
if (!vtx[i].DisconnectInputs(txdb))
return false;
// Update block index on disk without changing it in memory.
// The memory index structure will be changed after the db commits.
if (pindex->pprev)
{
CDiskBlockIndex blockindexPrev(pindex->pprev);
blockindexPrev.hashNext = 0;
txdb.WriteBlockIndex(blockindexPrev);
}
return true;
}
bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
{
//// issue here: it doesn't know the version
unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - 1 + GetSizeOfCompactSize(vtx.size());
map<uint256, CTxIndex> mapUnused;
int64 nFees = 0;
foreach(CTransaction& tx, vtx)
{
CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
nTxPos += ::GetSerializeSize(tx, SER_DISK);
if (!tx.ConnectInputs(txdb, mapUnused, posThisTx, pindex->nHeight, nFees, true, false))
return false;
}
if (vtx[0].GetValueOut() > GetBlockValue(nFees))
return false;
// Update block index on disk without changing it in memory.
// The memory index structure will be changed after the db commits.
if (pindex->pprev)
{
CDiskBlockIndex blockindexPrev(pindex->pprev);
blockindexPrev.hashNext = pindex->GetBlockHash();
txdb.WriteBlockIndex(blockindexPrev);
}
// Watch for transactions paying to me
foreach(CTransaction& tx, vtx)
AddToWalletIfMine(tx, this);
return true;
}
bool Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
{
printf("REORGANIZE\n");
// Find the fork
CBlockIndex* pfork = pindexBest;
CBlockIndex* plonger = pindexNew;
while (pfork != plonger)
{
if (!(pfork = pfork->pprev))
return error("Reorganize() : pfork->pprev is null");
while (plonger->nHeight > pfork->nHeight)
if (!(plonger = plonger->pprev))
return error("Reorganize() : plonger->pprev is null");
}
// List of what to disconnect
vector<CBlockIndex*> vDisconnect;
for (CBlockIndex* pindex = pindexBest; pindex != pfork; pindex = pindex->pprev)
vDisconnect.push_back(pindex);
// List of what to connect
vector<CBlockIndex*> vConnect;
for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
vConnect.push_back(pindex);
reverse(vConnect.begin(), vConnect.end());
// Disconnect shorter branch
vector<CTransaction> vResurrect;
foreach(CBlockIndex* pindex, vDisconnect)
{
CBlock block;
if (!block.ReadFromDisk(pindex->nFile, pindex->nBlockPos))
return error("Reorganize() : ReadFromDisk for disconnect failed");
if (!block.DisconnectBlock(txdb, pindex))
return error("Reorganize() : DisconnectBlock failed");
// Queue memory transactions to resurrect
foreach(const CTransaction& tx, block.vtx)
if (!tx.IsCoinBase())
vResurrect.push_back(tx);
}
// Connect longer branch
vector<CTransaction> vDelete;
for (int i = 0; i < vConnect.size(); i++)
{
CBlockIndex* pindex = vConnect[i];
CBlock block;
if (!block.ReadFromDisk(pindex->nFile, pindex->nBlockPos))
return error("Reorganize() : ReadFromDisk for connect failed");
if (!block.ConnectBlock(txdb, pindex))
{
// Invalid block, delete the rest of this branch
txdb.TxnAbort();
for (int j = i; j < vConnect.size(); j++)
{
CBlockIndex* pindex = vConnect[j];
pindex->EraseBlockFromDisk();
txdb.EraseBlockIndex(pindex->GetBlockHash());
mapBlockIndex.erase(pindex->GetBlockHash());
delete pindex;
}
return error("Reorganize() : ConnectBlock failed");
}
// Queue memory transactions to delete
foreach(const CTransaction& tx, block.vtx)
vDelete.push_back(tx);
}
if (!txdb.WriteHashBestChain(pindexNew->GetBlockHash()))
return error("Reorganize() : WriteHashBestChain failed");
// Commit now because resurrecting could take some time
txdb.TxnCommit();
// Disconnect shorter branch
foreach(CBlockIndex* pindex, vDisconnect)
if (pindex->pprev)
pindex->pprev->pnext = NULL;
// Connect longer branch
foreach(CBlockIndex* pindex, vConnect)
if (pindex->pprev)
pindex->pprev->pnext = pindex;
// Resurrect memory transactions that were in the disconnected branch
foreach(CTransaction& tx, vResurrect)
tx.AcceptTransaction(txdb, false);
// Delete redundant memory transactions that are in the connected branch
foreach(CTransaction& tx, vDelete)
tx.RemoveFromMemoryPool();
return true;
}
bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
{
// Check for duplicate
uint256 hash = GetHash();
if (mapBlockIndex.count(hash))
return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,16).c_str());
// Construct new block index object
CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
if (!pindexNew)
return error("AddToBlockIndex() : new CBlockIndex failed");
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
pindexNew->phashBlock = &((*mi).first);
map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
if (miPrev != mapBlockIndex.end())
{
pindexNew->pprev = (*miPrev).second;
pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
}
CTxDB txdb;
txdb.TxnBegin();
txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
// New best
if (pindexNew->nHeight > nBestHeight)
{
if (pindexGenesisBlock == NULL && hash == hashGenesisBlock)
{
pindexGenesisBlock = pindexNew;
txdb.WriteHashBestChain(hash);
}
else if (hashPrevBlock == hashBestChain)
{
// Adding to current best branch
if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
{
txdb.TxnAbort();
pindexNew->EraseBlockFromDisk();
mapBlockIndex.erase(pindexNew->GetBlockHash());
delete pindexNew;
return error("AddToBlockIndex() : ConnectBlock failed");
}
txdb.TxnCommit();
pindexNew->pprev->pnext = pindexNew;
// Delete redundant memory transactions
foreach(CTransaction& tx, vtx)
tx.RemoveFromMemoryPool();
}
else
{
// New best branch
if (!Reorganize(txdb, pindexNew))
{
txdb.TxnAbort();
return error("AddToBlockIndex() : Reorganize failed");
}
}
// New best link
hashBestChain = hash;
pindexBest = pindexNew;
nBestHeight = pindexBest->nHeight;
nTransactionsUpdated++;
printf("AddToBlockIndex: new best=%s height=%d\n", hashBestChain.ToString().substr(0,16).c_str(), nBestHeight);
}
txdb.TxnCommit();
txdb.Close();
if (pindexNew == pindexBest)
{
// Relay wallet transactions that haven't gotten in yet
RelayWalletTransactions();
// Notify UI to display prev block's coinbase if it was ours
static uint256 hashPrevBestCoinBase;
CRITICAL_BLOCK(cs_mapWallet)
vWalletUpdated.push_back(hashPrevBestCoinBase);
hashPrevBestCoinBase = vtx[0].GetHash();
}
MainFrameRepaint();
return true;
}
bool CBlock::CheckBlock() const
{
// These are checks that are independent of context
// that can be verified before saving an orphan block.
// Size limits
if (vtx.empty() || vtx.size() > MAX_SIZE || ::GetSerializeSize(*this, SER_DISK) > MAX_SIZE)
return error("CheckBlock() : size limits failed");
// Check timestamp
if (nTime > GetAdjustedTime() + 2 * 60 * 60)
return error("CheckBlock() : block timestamp too far in the future");
// First transaction must be coinbase, the rest must not be
if (vtx.empty() || !vtx[0].IsCoinBase())
return error("CheckBlock() : first tx is not coinbase");
for (int i = 1; i < vtx.size(); i++)
if (vtx[i].IsCoinBase())
return error("CheckBlock() : more than one coinbase");
// Check transactions
foreach(const CTransaction& tx, vtx)
if (!tx.CheckTransaction())
return error("CheckBlock() : CheckTransaction failed");
// Check proof of work matches claimed amount
if (CBigNum().SetCompact(nBits) > bnProofOfWorkLimit)
return error("CheckBlock() : nBits below minimum work");
if (GetHash() > CBigNum().SetCompact(nBits).getuint256())
return error("CheckBlock() : hash doesn't match nBits");
// Check merkleroot
if (hashMerkleRoot != BuildMerkleTree())
return error("CheckBlock() : hashMerkleRoot mismatch");
return true;
}
bool CBlock::AcceptBlock()
{
// Check for duplicate
uint256 hash = GetHash();
if (mapBlockIndex.count(hash))
return error("AcceptBlock() : block already in mapBlockIndex");
// Get prev block index
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
if (mi == mapBlockIndex.end())
return error("AcceptBlock() : prev block not found");
CBlockIndex* pindexPrev = (*mi).second;
// Check timestamp against prev
if (nTime <= pindexPrev->GetMedianTimePast())
return error("AcceptBlock() : block's timestamp is too early");
// Check that all transactions are finalized (starting around Mar 2010)
if (nBestHeight > 36000)
foreach(const CTransaction& tx, vtx)
if (!tx.IsFinal(nTime))
return error("AcceptBlock() : contains a non-final transaction");
// Check proof of work
if (nBits != GetNextWorkRequired(pindexPrev))
return error("AcceptBlock() : incorrect proof of work");
// Write block to history file
if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK)))
return error("AcceptBlock() : out of disk space");
unsigned int nFile;
unsigned int nBlockPos;
if (!WriteToDisk(!fClient, nFile, nBlockPos))
return error("AcceptBlock() : WriteToDisk failed");
if (!AddToBlockIndex(nFile, nBlockPos))
return error("AcceptBlock() : AddToBlockIndex failed");
if (hashBestChain == hash && nBestHeight > 28000)
RelayInventory(CInv(MSG_BLOCK, hash));
// // Add atoms to user reviews for coins created
// vector<unsigned char> vchPubKey;
// if (ExtractPubKey(vtx[0].vout[0].scriptPubKey, false, vchPubKey))
// {
// unsigned short nAtom = GetRand(USHRT_MAX - 100) + 100;
// vector<unsigned short> vAtoms(1, nAtom);
// AddAtomsAndPropagate(Hash(vchPubKey.begin(), vchPubKey.end()), vAtoms, true);
// }
return true;
}
bool ProcessBlock(CNode* pfrom, CBlock* pblock)
{
// Check for duplicate
uint256 hash = pblock->GetHash();
if (mapBlockIndex.count(hash))
return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,16).c_str());
if (mapOrphanBlocks.count(hash))
return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,16).c_str());
// Preliminary checks
if (!pblock->CheckBlock())
{
delete pblock;
return error("ProcessBlock() : CheckBlock FAILED");
}
// If don't already have its previous block, shunt it off to holding area until we get it
if (!mapBlockIndex.count(pblock->hashPrevBlock))
{
printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,16).c_str());
mapOrphanBlocks.insert(make_pair(hash, pblock));
mapOrphanBlocksByPrev.insert(make_pair(pblock->hashPrevBlock, pblock));
// Ask this guy to fill in what we're missing
if (pfrom)
pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(pblock));
return true;
}
// Store to disk
if (!pblock->AcceptBlock())
{
delete pblock;
return error("ProcessBlock() : AcceptBlock FAILED");
}
delete pblock;
// Recursively process any orphan blocks that depended on this one
vector<uint256> vWorkQueue;
vWorkQueue.push_back(hash);
for (int i = 0; i < vWorkQueue.size(); i++)
{
uint256 hashPrev = vWorkQueue[i];
for (multimap<uint256, CBlock*>::iterator mi = mapOrphanBlocksByPrev.lower_bound(hashPrev);
mi != mapOrphanBlocksByPrev.upper_bound(hashPrev);
++mi)
{
CBlock* pblockOrphan = (*mi).second;
if (pblockOrphan->AcceptBlock())
vWorkQueue.push_back(pblockOrphan->GetHash());
mapOrphanBlocks.erase(pblockOrphan->GetHash());
delete pblockOrphan;
}
mapOrphanBlocksByPrev.erase(hashPrev);
}
printf("ProcessBlock: ACCEPTED\n");
return true;
}
template<typename Stream>
bool ScanMessageStart(Stream& s)
{
// Scan ahead to the next pchMessageStart, which should normally be immediately
// at the file pointer. Leaves file pointer at end of pchMessageStart.
s.clear(0);
short prevmask = s.exceptions(0);
const char* p = BEGIN(pchMessageStart);
try
{
loop
{
char c;
s.read(&c, 1);
if (s.fail())
{
s.clear(0);
s.exceptions(prevmask);
return false;
}
if (*p != c)
p = BEGIN(pchMessageStart);
if (*p == c)
{
if (++p == END(pchMessageStart))
{
s.clear(0);
s.exceptions(prevmask);
return true;
}
}
}
}
catch (...)
{
s.clear(0);
s.exceptions(prevmask);
return false;
}
}
bool CheckDiskSpace(int64 nAdditionalBytes)
{
#ifdef __WXMSW__
uint64 nFreeBytesAvailable = 0; // bytes available to caller
uint64 nTotalNumberOfBytes = 0; // bytes on disk
uint64 nTotalNumberOfFreeBytes = 0; // free bytes on disk
if (!GetDiskFreeSpaceEx(GetDataDir().c_str(),
(PULARGE_INTEGER)&nFreeBytesAvailable,
(PULARGE_INTEGER)&nTotalNumberOfBytes,
(PULARGE_INTEGER)&nTotalNumberOfFreeBytes))
{
printf("ERROR: GetDiskFreeSpaceEx() failed\n");
return true;
}
#else
uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
#endif
// Check for 15MB because database could create another 10MB log file at any time
if (nFreeBytesAvailable < (int64)15000000 + nAdditionalBytes)
{
fShutdown = true;
ThreadSafeMessageBox("Warning: Your disk space is low ", "Bitcoin", wxOK | wxICON_EXCLAMATION);
CreateThread(Shutdown, NULL);
return false;
}
return true;
}
FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
{
if (nFile == -1)
return NULL;
FILE* file = fopen(strprintf("%s/blk%04d.dat", GetDataDir().c_str(), nFile).c_str(), pszMode);
if (!file)
return NULL;
if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))
{
if (fseek(file, nBlockPos, SEEK_SET) != 0)
{
fclose(file);
return NULL;
}
}
return file;
}
static unsigned int nCurrentBlockFile = 1;
FILE* AppendBlockFile(unsigned int& nFileRet)
{
nFileRet = 0;
loop
{
FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
if (!file)
return NULL;
if (fseek(file, 0, SEEK_END) != 0)
return NULL;
// FAT32 filesize max 4GB, fseek and ftell max 2GB, so we must stay under 2GB
if (ftell(file) < 0x7F000000 - MAX_SIZE)
{
nFileRet = nCurrentBlockFile;
return file;
}
fclose(file);
nCurrentBlockFile++;
}
}
bool LoadBlockIndex(bool fAllowNew)
{
//
// Load block index
//
CTxDB txdb("cr");
if (!txdb.LoadBlockIndex())
return false;
txdb.Close();
//
// Init with genesis block
//
if (mapBlockIndex.empty())
{
if (!fAllowNew)
return false;
// Genesis Block:
// GetHash() = 0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
// hashMerkleRoot = 0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b
// txNew.vin[0].scriptSig = 486604799 4 0x736B6E616220726F662074756F6C69616220646E6F63657320666F206B6E697262206E6F20726F6C6C65636E61684320393030322F6E614A2F33302073656D695420656854
// txNew.vout[0].nValue = 5000000000
// txNew.vout[0].scriptPubKey = 0x5F1DF16B2B704C8A578D0BBAF74D385CDE12C11EE50455F3C438EF4C3FBCF649B6DE611FEAE06279A60939E028A8D65C10B73071A6F16719274855FEB0FD8A6704 OP_CHECKSIG
// block.nVersion = 1
// block.nTime = 1231006505
// block.nBits = 0x1d00ffff
// block.nNonce = 2083236893
// CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
// CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
// CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
// CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
// vMerkleTree: 4a5e1e
// Genesis block
const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
CTransaction txNew;
txNew.vin.resize(1);
txNew.vout.resize(1);
txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
txNew.vout[0].nValue = 50 * COIN;
txNew.vout[0].scriptPubKey = CScript() << CBigNum("0x5F1DF16B2B704C8A578D0BBAF74D385CDE12C11EE50455F3C438EF4C3FBCF649B6DE611FEAE06279A60939E028A8D65C10B73071A6F16719274855FEB0FD8A6704") << OP_CHECKSIG;
CBlock block;
block.vtx.push_back(txNew);
block.hashPrevBlock = 0;
block.hashMerkleRoot = block.BuildMerkleTree();
block.nVersion = 1;
block.nTime = 1231006505;
block.nBits = 0x1d00ffff;
block.nNonce = 2083236893;
//// debug print
printf("%s\n", block.GetHash().ToString().c_str());
printf("%s\n", block.hashMerkleRoot.ToString().c_str());
printf("%s\n", hashGenesisBlock.ToString().c_str());
txNew.vout[0].scriptPubKey.print();
block.print();
assert(block.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
assert(block.GetHash() == hashGenesisBlock);
// Start new block file
unsigned int nFile;
unsigned int nBlockPos;
if (!block.WriteToDisk(!fClient, nFile, nBlockPos))
return error("LoadBlockIndex() : writing genesis block to disk failed");
if (!block.AddToBlockIndex(nFile, nBlockPos))
return error("LoadBlockIndex() : genesis block not accepted");
}
return true;
}
void PrintBlockTree()
{
// precompute tree structure
map<CBlockIndex*, vector<CBlockIndex*> > mapNext;
for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
{
CBlockIndex* pindex = (*mi).second;
mapNext[pindex->pprev].push_back(pindex);
// test
//while (rand() % 3 == 0)
// mapNext[pindex->pprev].push_back(pindex);
}
vector<pair<int, CBlockIndex*> > vStack;
vStack.push_back(make_pair(0, pindexGenesisBlock));
int nPrevCol = 0;
while (!vStack.empty())
{
int nCol = vStack.back().first;
CBlockIndex* pindex = vStack.back().second;
vStack.pop_back();
// print split or gap
if (nCol > nPrevCol)
{
for (int i = 0; i < nCol-1; i++)
printf("| ");
printf("|\\\n");
}
else if (nCol < nPrevCol)
{
for (int i = 0; i < nCol; i++)
printf("| ");
printf("|\n");
}
nPrevCol = nCol;
// print columns
for (int i = 0; i < nCol; i++)
printf("| ");
// print item
CBlock block;
block.ReadFromDisk(pindex);
printf("%d (%u,%u) %s %s tx %d",
pindex->nHeight,
pindex->nFile,
pindex->nBlockPos,
block.GetHash().ToString().substr(0,16).c_str(),
DateTimeStrFormat("%x %H:%M:%S", block.nTime).c_str(),
block.vtx.size());
CRITICAL_BLOCK(cs_mapWallet)
{
if (mapWallet.count(block.vtx[0].GetHash()))
{
CWalletTx& wtx = mapWallet[block.vtx[0].GetHash()];
printf(" mine: %d %d %d", wtx.GetDepthInMainChain(), wtx.GetBlocksToMaturity(), wtx.GetCredit());
}
}
printf("\n");
// put the main timechain first
vector<CBlockIndex*>& vNext = mapNext[pindex];
for (int i = 0; i < vNext.size(); i++)
{
if (vNext[i]->pnext)
{
swap(vNext[0], vNext[i]);
break;
}
}
// iterate children
for (int i = 0; i < vNext.size(); i++)
vStack.push_back(make_pair(nCol+i, vNext[i]));
}
}
//////////////////////////////////////////////////////////////////////////////
//
// Messages
//
bool AlreadyHave(CTxDB& txdb, const CInv& inv)
{
switch (inv.type)
{
case MSG_TX: return mapTransactions.count(inv.hash) || txdb.ContainsTx(inv.hash);
case MSG_BLOCK: return mapBlockIndex.count(inv.hash) || mapOrphanBlocks.count(inv.hash);
case MSG_REVIEW: return true;
case MSG_PRODUCT: return mapProducts.count(inv.hash);
}
// Don't know what it is, just say we already got one
return true;
}
bool ProcessMessages(CNode* pfrom)
{
CDataStream& vRecv = pfrom->vRecv;
if (vRecv.empty())
return true;
//if (fDebug)
// printf("ProcessMessages(%d bytes)\n", vRecv.size());
//
// Message format
// (4) message start
// (12) command
// (4) size
// (x) data
//
loop
{
// Scan for message start
CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
if (vRecv.end() - pstart < sizeof(CMessageHeader))
{
if (vRecv.size() > sizeof(CMessageHeader))
{
printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
vRecv.erase(vRecv.begin(), vRecv.end() - sizeof(CMessageHeader));
}
break;
}
if (pstart - vRecv.begin() > 0)
printf("\n\nPROCESSMESSAGE SKIPPED %d BYTES\n\n", pstart - vRecv.begin());
vRecv.erase(vRecv.begin(), pstart);
// Read header
CMessageHeader hdr;
vRecv >> hdr;
if (!hdr.IsValid())
{
printf("\n\nPROCESSMESSAGE: ERRORS IN HEADER %s\n\n\n", hdr.GetCommand().c_str());
continue;
}
string strCommand = hdr.GetCommand();
// Message size
unsigned int nMessageSize = hdr.nMessageSize;
if (nMessageSize > vRecv.size())
{
// Rewind and wait for rest of message
///// need a mechanism to give up waiting for overlong message size error
//if (fDebug)
// printf("message-break\n");
vRecv.insert(vRecv.begin(), BEGIN(hdr), END(hdr));
Sleep(100);
break;
}
// Copy message to its own buffer
CDataStream vMsg(vRecv.begin(), vRecv.begin() + nMessageSize, vRecv.nType, vRecv.nVersion);
vRecv.ignore(nMessageSize);
// Process message
bool fRet = false;
try
{
CRITICAL_BLOCK(cs_main)
fRet = ProcessMessage(pfrom, strCommand, vMsg);
if (fShutdown)
return true;
}
catch (std::ios_base::failure& e)
{
if (strstr(e.what(), "CDataStream::read() : end of data"))
{
// Allow exceptions from underlength message on vRecv
printf("ProcessMessage(%s, %d bytes) : Exception '%s' caught, normally caused by a message being shorter than its stated length\n", strCommand.c_str(), nMessageSize, e.what());
}
else if (strstr(e.what(), ": size too large"))
{
// Allow exceptions from overlong size
printf("ProcessMessage(%s, %d bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
}
else
{
PrintException(&e, "ProcessMessage()");
}
}
catch (std::exception& e) {
PrintException(&e, "ProcessMessage()");
} catch (...) {
PrintException(NULL, "ProcessMessage()");
}
if (!fRet)
printf("ProcessMessage(%s, %d bytes) FAILED\n", strCommand.c_str(), nMessageSize);
}
vRecv.Compact();
return true;
}
bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
{
static map<unsigned int, vector<unsigned char> > mapReuseKey;
RandAddSeedPerfmon();
if (fDebug)
printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
printf("received: %s (%d bytes)\n", strCommand.c_str(), vRecv.size());
if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
{
printf("dropmessagestest DROPPING RECV MESSAGE\n");
return true;
}
if (strCommand == "version")
{
// Each connection can only send one version message
if (pfrom->nVersion != 0)
return false;
int64 nTime;
CAddress addrMe;
CAddress addrFrom;
uint64 nNonce = 1;
string strSubVer;
vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
if (pfrom->nVersion >= 106 && !vRecv.empty())
vRecv >> addrFrom >> nNonce;
if (pfrom->nVersion >= 106 && !vRecv.empty())
vRecv >> strSubVer;
if (pfrom->nVersion == 0)
return false;
// Disconnect if we connected to ourself
if (nNonce == nLocalHostNonce && nNonce > 1)
{
pfrom->fDisconnect = true;
return true;
}
pfrom->vSend.SetVersion(min(pfrom->nVersion, VERSION));
pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
if (pfrom->fClient)
{
pfrom->vSend.nType |= SER_BLOCKHEADERONLY;
pfrom->vRecv.nType |= SER_BLOCKHEADERONLY;
}
AddTimeData(pfrom->addr.ip, nTime);
// Ask the first connected node for block updates
static bool fAskedForBlocks;
if (!fAskedForBlocks && !pfrom->fClient)
{
fAskedForBlocks = true;
pfrom->PushGetBlocks(pindexBest, uint256(0));
}
pfrom->fSuccessfullyConnected = true;
printf("version message: version %d\n", pfrom->nVersion);
}
else if (pfrom->nVersion == 0)
{
// Must have a version message before anything else
return false;
}
else if (strCommand == "addr")
{
vector<CAddress> vAddr;
vRecv >> vAddr;
if (vAddr.size() > 50000) // lower this to 1000 later
return error("message addr size() = %d", vAddr.size());
// Store the new addresses
foreach(CAddress& addr, vAddr)
{
if (fShutdown)
return true;
addr.nTime = GetAdjustedTime() - 2 * 60 * 60;
if (pfrom->fGetAddr)
addr.nTime -= 5 * 24 * 60 * 60;
AddAddress(addr, false);
pfrom->AddAddressKnown(addr);
if (!pfrom->fGetAddr && addr.IsRoutable())
{
// Put on lists to send to other nodes
CRITICAL_BLOCK(cs_vNodes)
foreach(CNode* pnode, vNodes)
pnode->PushAddress(addr);
}
}
pfrom->fGetAddr = false;
}
else if (strCommand == "inv")
{
vector<CInv> vInv;
vRecv >> vInv;
if (vInv.size() > 50000)
return error("message inv size() = %d", vInv.size());
CTxDB txdb("r");
foreach(const CInv& inv, vInv)
{
if (fShutdown)
return true;
pfrom->AddInventoryKnown(inv);
bool fAlreadyHave = AlreadyHave(txdb, inv);
printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
if (!fAlreadyHave)
pfrom->AskFor(inv);
else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash))
pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
// Track requests for our stuff
CRITICAL_BLOCK(cs_mapRequestCount)
{
map<uint256, int>::iterator mi = mapRequestCount.find(inv.hash);
if (mi != mapRequestCount.end())
(*mi).second++;
}
}
}
else if (strCommand == "getdata")
{
vector<CInv> vInv;
vRecv >> vInv;
if (vInv.size() > 50000)
return error("message getdata size() = %d", vInv.size());
foreach(const CInv& inv, vInv)
{
if (fShutdown)
return true;
printf("received getdata for: %s\n", inv.ToString().c_str());
if (inv.type == MSG_BLOCK)
{
// Send block from disk
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(inv.hash);
if (mi != mapBlockIndex.end())
{
//// could optimize this to send header straight from blockindex for client
CBlock block;
block.ReadFromDisk((*mi).second, !pfrom->fClient);
pfrom->PushMessage("block", block);
// Trigger them to send a getblocks request for the next batch of inventory
if (inv.hash == pfrom->hashContinue)
{
// Bypass PushInventory, this must send even if redundant,
// and we want it right after the last block so they don't
// wait for other stuff first.
vector<CInv> vInv;
vInv.push_back(CInv(MSG_BLOCK, hashBestChain));
pfrom->PushMessage("inv", vInv);
pfrom->hashContinue = 0;
}
}
}
else if (inv.IsKnownType())
{
// Send stream from relay memory
CRITICAL_BLOCK(cs_mapRelay)
{
map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
if (mi != mapRelay.end())
pfrom->PushMessage(inv.GetCommand(), (*mi).second);
}
}
// Track requests for our stuff
CRITICAL_BLOCK(cs_mapRequestCount)
{
map<uint256, int>::iterator mi = mapRequestCount.find(inv.hash);
if (mi != mapRequestCount.end())
(*mi).second++;
}
}
}
else if (strCommand == "getblocks")
{
CBlockLocator locator;
uint256 hashStop;
vRecv >> locator >> hashStop;
// Find the first block the caller has in the main chain
CBlockIndex* pindex = locator.GetBlockIndex();
// Send the rest of the chain
if (pindex)
pindex = pindex->pnext;
int nLimit = 500 + locator.GetDistanceBack();
printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,16).c_str(), nLimit);
for (; pindex; pindex = pindex->pnext)
{
if (pindex->GetBlockHash() == hashStop)
{
printf(" getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,16).c_str());
break;
}
pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
if (--nLimit <= 0)
{
// When this block is requested, we'll send an inv that'll make them
// getblocks the next batch of inventory.
printf(" getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,16).c_str());
pfrom->hashContinue = pindex->GetBlockHash();
break;
}
}
}
else if (strCommand == "tx")
{
vector<uint256> vWorkQueue;
CDataStream vMsg(vRecv);
CTransaction tx;
vRecv >> tx;
CInv inv(MSG_TX, tx.GetHash());
pfrom->AddInventoryKnown(inv);
bool fMissingInputs = false;
if (tx.AcceptTransaction(true, &fMissingInputs))
{
AddToWalletIfMine(tx, NULL);
RelayMessage(inv, vMsg);
mapAlreadyAskedFor.erase(inv);
vWorkQueue.push_back(inv.hash);
// Recursively process any orphan transactions that depended on this one
for (int i = 0; i < vWorkQueue.size(); i++)
{
uint256 hashPrev = vWorkQueue[i];
for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(hashPrev);
mi != mapOrphanTransactionsByPrev.upper_bound(hashPrev);
++mi)
{
const CDataStream& vMsg = *((*mi).second);
CTransaction tx;
CDataStream(vMsg) >> tx;
CInv inv(MSG_TX, tx.GetHash());
if (tx.AcceptTransaction(true))
{
printf(" accepted orphan tx %s\n", inv.hash.ToString().substr(0,6).c_str());
AddToWalletIfMine(tx, NULL);
RelayMessage(inv, vMsg);
mapAlreadyAskedFor.erase(inv);
vWorkQueue.push_back(inv.hash);
}
}
}
foreach(uint256 hash, vWorkQueue)
EraseOrphanTx(hash);
}
else if (fMissingInputs)
{
printf("storing orphan tx %s\n", inv.hash.ToString().substr(0,6).c_str());
AddOrphanTx(vMsg);
}
}
else if (strCommand == "review")
{
CDataStream vMsg(vRecv);
CReview review;
vRecv >> review;
CInv inv(MSG_REVIEW, review.GetHash());
pfrom->AddInventoryKnown(inv);
if (review.AcceptReview())
{
// Relay the original message as-is in case it's a higher version than we know how to parse
RelayMessage(inv, vMsg);
mapAlreadyAskedFor.erase(inv);
}
}
else if (strCommand == "block")
{
auto_ptr<CBlock> pblock(new CBlock);
vRecv >> *pblock;
//// debug print
// printf("received block:\n");
// pblock->print();
printf("received block %s\n", pblock->GetHash().ToString().substr(0,16).c_str());
CInv inv(MSG_BLOCK, pblock->GetHash());
pfrom->AddInventoryKnown(inv);
if (ProcessBlock(pfrom, pblock.release()))
mapAlreadyAskedFor.erase(inv);
}
else if (strCommand == "getaddr")
{
pfrom->vAddrToSend.clear();
int64 nSince = GetAdjustedTime() - 5 * 24 * 60 * 60; // in the last 5 days
CRITICAL_BLOCK(cs_mapAddresses)
{
unsigned int nSize = mapAddresses.size();
foreach(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
{
if (fShutdown)
return true;
const CAddress& addr = item.second;
if (addr.nTime > nSince)
pfrom->PushAddress(addr);
}
}
}
else if (strCommand == "checkorder")
{
uint256 hashReply;
CWalletTx order;
vRecv >> hashReply >> order;
/// we have a chance to check the order here
// Keep giving the same key to the same ip until they use it
if (!mapReuseKey.count(pfrom->addr.ip))
mapReuseKey[pfrom->addr.ip] = GenerateNewKey();
// Send back approval of order and pubkey to use
CScript scriptPubKey;
scriptPubKey << mapReuseKey[pfrom->addr.ip] << OP_CHECKSIG;
pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
}
else if (strCommand == "submitorder")
{
uint256 hashReply;
CWalletTx wtxNew;
vRecv >> hashReply >> wtxNew;
// Broadcast
if (!wtxNew.AcceptWalletTransaction())
{
pfrom->PushMessage("reply", hashReply, (int)1);
return error("submitorder AcceptWalletTransaction() failed, returning error 1");
}
wtxNew.fTimeReceivedIsTxTime = true;
AddToWallet(wtxNew);
wtxNew.RelayWalletTransaction();
mapReuseKey.erase(pfrom->addr.ip);
// Send back confirmation
pfrom->PushMessage("reply", hashReply, (int)0);
}
else if (strCommand == "reply")
{
uint256 hashReply;
vRecv >> hashReply;
CRequestTracker tracker;
CRITICAL_BLOCK(pfrom->cs_mapRequests)
{
map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
if (mi != pfrom->mapRequests.end())
{
tracker = (*mi).second;
pfrom->mapRequests.erase(mi);
}
}
if (!tracker.IsNull())
tracker.fn(tracker.param1, vRecv);
}
else if (strCommand == "ping")
{
}
else
{
// Ignore unknown commands for extensibility
}
// Update the last seen time for this node's address
if (pfrom->fNetworkNode)
if (strCommand == "version" || strCommand == "addr" || strCommand == "inv" || strCommand == "getdata" || strCommand == "ping")
AddressCurrentlyConnected(pfrom->addr);
return true;
}
bool SendMessages(CNode* pto)
{
CRITICAL_BLOCK(cs_main)
{
// Don't send anything until we get their version message
if (pto->nVersion == 0)
return true;
// Keep-alive ping
if (pto->nLastSend && GetTime() - pto->nLastSend > 12 * 60 && pto->vSend.empty())
pto->PushMessage("ping");
// Address refresh broadcast
static int64 nLastRebroadcast;
if (GetTime() - nLastRebroadcast > 24 * 60 * 60) // every 24 hours
{
nLastRebroadcast = GetTime();
CRITICAL_BLOCK(cs_vNodes)
{
foreach(CNode* pnode, vNodes)
{
// Periodically clear setAddrKnown to allow refresh broadcasts
pnode->setAddrKnown.clear();
// Rebroadcast our address
if (addrLocalHost.IsRoutable() && !fUseProxy)
pnode->PushAddress(addrLocalHost);
}
}
}
//
// Message: addr
//
vector<CAddress> vAddrToSend;
vAddrToSend.reserve(pto->vAddrToSend.size());
foreach(const CAddress& addr, pto->vAddrToSend)
{
// returns true if wasn't already contained in the set
if (pto->setAddrKnown.insert(addr).second)
{
vAddrToSend.push_back(addr);
if (vAddrToSend.size() >= 1000)
{
pto->PushMessage("addr", vAddrToSend);
vAddrToSend.clear();
}
}
}
pto->vAddrToSend.clear();
if (!vAddrToSend.empty())
pto->PushMessage("addr", vAddrToSend);
//
// Message: inventory
//
vector<CInv> vInventoryToSend;
CRITICAL_BLOCK(pto->cs_inventory)
{
vInventoryToSend.reserve(pto->vInventoryToSend.size());
foreach(const CInv& inv, pto->vInventoryToSend)
{
// returns true if wasn't already contained in the set
if (pto->setInventoryKnown.insert(inv).second)
{
vInventoryToSend.push_back(inv);
if (vInventoryToSend.size() >= 1000)
{
pto->PushMessage("inv", vInventoryToSend);
vInventoryToSend.clear();
}
}
}
pto->vInventoryToSend.clear();
}
if (!vInventoryToSend.empty())
pto->PushMessage("inv", vInventoryToSend);
//
// Message: getdata
//
vector<CInv> vAskFor;
int64 nNow = GetTime() * 1000000;
CTxDB txdb("r");
while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
{
const CInv& inv = (*pto->mapAskFor.begin()).second;
if (!AlreadyHave(txdb, inv))
{
printf("sending getdata: %s\n", inv.ToString().c_str());
vAskFor.push_back(inv);
if (vAskFor.size() >= 1000)
{
pto->PushMessage("getdata", vAskFor);
vAskFor.clear();
}
}
pto->mapAskFor.erase(pto->mapAskFor.begin());
}
if (!vAskFor.empty())
pto->PushMessage("getdata", vAskFor);
}
return true;
}
//////////////////////////////////////////////////////////////////////////////
//
// BitcoinMiner
//
void GenerateBitcoins(bool fGenerate)
{
if (fGenerateBitcoins != fGenerate)
{
fGenerateBitcoins = fGenerate;
CWalletDB().WriteSetting("fGenerateBitcoins", fGenerateBitcoins);
MainFrameRepaint();
}
if (fGenerateBitcoins)
{
int nProcessors = wxThread::GetCPUCount();
printf("%d processors\n", nProcessors);
if (nProcessors < 1)
nProcessors = 1;
if (fLimitProcessors && nProcessors > nLimitProcessors)
nProcessors = nLimitProcessors;
int nAddThreads = nProcessors - vnThreadsRunning[3];
printf("Starting %d BitcoinMiner threads\n", nAddThreads);
for (int i = 0; i < nAddThreads; i++)
if (!CreateThread(ThreadBitcoinMiner, NULL))
printf("Error: CreateThread(ThreadBitcoinMiner) failed\n");
}
}
void ThreadBitcoinMiner(void* parg)
{
try
{
vnThreadsRunning[3]++;
BitcoinMiner();
vnThreadsRunning[3]--;
}
catch (std::exception& e) {
vnThreadsRunning[3]--;
PrintException(&e, "ThreadBitcoinMiner()");
} catch (...) {
vnThreadsRunning[3]--;
PrintException(NULL, "ThreadBitcoinMiner()");
}
printf("ThreadBitcoinMiner exiting, %d threads remaining\n", vnThreadsRunning[3]);
}
int FormatHashBlocks(void* pbuffer, unsigned int len)
{
unsigned char* pdata = (unsigned char*)pbuffer;
unsigned int blocks = 1 + ((len + 8) / 64);
unsigned char* pend = pdata + 64 * blocks;
memset(pdata + len, 0, 64 * blocks - len);
pdata[len] = 0x80;
unsigned int bits = len * 8;
pend[-1] = (bits >> 0) & 0xff;
pend[-2] = (bits >> 8) & 0xff;
pend[-3] = (bits >> 16) & 0xff;
pend[-4] = (bits >> 24) & 0xff;
return blocks;
}
using CryptoPP::ByteReverse;
static int detectlittleendian = 1;
void BlockSHA256(const void* pin, unsigned int nBlocks, void* pout)
{
unsigned int* pinput = (unsigned int*)pin;
unsigned int* pstate = (unsigned int*)pout;
CryptoPP::SHA256::InitState(pstate);
if (*(char*)&detectlittleendian != 0)
{
for (int n = 0; n < nBlocks; n++)
{
unsigned int pbuf[16];
for (int i = 0; i < 16; i++)
pbuf[i] = ByteReverse(pinput[n * 16 + i]);
CryptoPP::SHA256::Transform(pstate, pbuf);
}
for (int i = 0; i < 8; i++)
pstate[i] = ByteReverse(pstate[i]);
}
else
{
for (int n = 0; n < nBlocks; n++)
CryptoPP::SHA256::Transform(pstate, pinput + n * 16);
}
}
void BitcoinMiner()
{
printf("BitcoinMiner started\n");
CKey key;
key.MakeNewKey();
CBigNum bnExtraNonce = 0;
while (fGenerateBitcoins)
{
SetThreadPriority(THREAD_PRIORITY_LOWEST);
Sleep(50);
if (fShutdown)
return;
while (vNodes.empty())
{
Sleep(1000);
if (fShutdown)
return;
if (!fGenerateBitcoins)
return;
}
unsigned int nTransactionsUpdatedLast = nTransactionsUpdated;
CBlockIndex* pindexPrev = pindexBest;
unsigned int nBits = GetNextWorkRequired(pindexPrev);
//
// Create coinbase tx
//
CTransaction txNew;
txNew.vin.resize(1);
txNew.vin[0].prevout.SetNull();
txNew.vin[0].scriptSig << nBits << ++bnExtraNonce;
txNew.vout.resize(1);
txNew.vout[0].scriptPubKey << key.GetPubKey() << OP_CHECKSIG;
//
// Create new block
//
auto_ptr<CBlock> pblock(new CBlock());
if (!pblock.get())
return;
// Add our coinbase tx as first transaction
pblock->vtx.push_back(txNew);
// Collect the latest transactions into the block
int64 nFees = 0;
CRITICAL_BLOCK(cs_main)
CRITICAL_BLOCK(cs_mapTransactions)
{
CTxDB txdb("r");
map<uint256, CTxIndex> mapTestPool;
vector<char> vfAlreadyAdded(mapTransactions.size());
bool fFoundSomething = true;
unsigned int nBlockSize = 0;
while (fFoundSomething && nBlockSize < MAX_SIZE/2)
{
fFoundSomething = false;
unsigned int n = 0;
for (map<uint256, CTransaction>::iterator mi = mapTransactions.begin(); mi != mapTransactions.end(); ++mi, ++n)
{
if (vfAlreadyAdded[n])
continue;
CTransaction& tx = (*mi).second;
if (tx.IsCoinBase() || !tx.IsFinal())
continue;
// Transaction fee based on block size
int64 nMinFee = tx.GetMinFee(nBlockSize);
map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), 0, nFees, false, true, nMinFee))
continue;
swap(mapTestPool, mapTestPoolTmp);
pblock->vtx.push_back(tx);
nBlockSize += ::GetSerializeSize(tx, SER_NETWORK);
vfAlreadyAdded[n] = true;
fFoundSomething = true;
}
}
}
pblock->nBits = nBits;
pblock->vtx[0].vout[0].nValue = pblock->GetBlockValue(nFees);
printf("Running BitcoinMiner with %d transactions in block\n", pblock->vtx.size());
//
// Prebuild hash buffer
//
struct unnamed1
{
struct unnamed2
{
int nVersion;
uint256 hashPrevBlock;
uint256 hashMerkleRoot;
unsigned int nTime;
unsigned int nBits;
unsigned int nNonce;
}
block;
unsigned char pchPadding0[64];
uint256 hash1;
unsigned char pchPadding1[64];
}
tmp;
tmp.block.nVersion = pblock->nVersion;
tmp.block.hashPrevBlock = pblock->hashPrevBlock = (pindexPrev ? pindexPrev->GetBlockHash() : 0);
tmp.block.hashMerkleRoot = pblock->hashMerkleRoot = pblock->BuildMerkleTree();
tmp.block.nTime = pblock->nTime = max((pindexPrev ? pindexPrev->GetMedianTimePast()+1 : 0), GetAdjustedTime());
tmp.block.nBits = pblock->nBits = nBits;
tmp.block.nNonce = pblock->nNonce = 1;
unsigned int nBlocks0 = FormatHashBlocks(&tmp.block, sizeof(tmp.block));
unsigned int nBlocks1 = FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
//
// Search
//
int64 nStart = GetTime();
uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
uint256 hash;
loop
{
BlockSHA256(&tmp.block, nBlocks0, &tmp.hash1);
BlockSHA256(&tmp.hash1, nBlocks1, &hash);
if (hash <= hashTarget)
{
pblock->nNonce = tmp.block.nNonce;
assert(hash == pblock->GetHash());
//// debug print
printf("BitcoinMiner:\n");
printf("proof-of-work found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str());
pblock->print();
SetThreadPriority(THREAD_PRIORITY_NORMAL);
CRITICAL_BLOCK(cs_main)
{
if (pindexPrev == pindexBest)
{
// Save key
if (!AddKey(key))
return;
key.MakeNewKey();
// Track how many getdata requests this block gets
CRITICAL_BLOCK(cs_mapRequestCount)
mapRequestCount[pblock->GetHash()] = 0;
// Process this block the same as if we had received it from another node
if (!ProcessBlock(NULL, pblock.release()))
printf("ERROR in BitcoinMiner, ProcessBlock, block not accepted\n");
}
}
SetThreadPriority(THREAD_PRIORITY_LOWEST);
Sleep(500);
break;
}
// Update nTime every few seconds
if ((++tmp.block.nNonce & 0xffff) == 0)
{
if (fShutdown)
return;
if (!fGenerateBitcoins)
return;
if (fLimitProcessors && vnThreadsRunning[3] > nLimitProcessors)
return;
if (vNodes.empty())
break;
if (tmp.block.nNonce == 0)
break;
if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60)
break;
if (pindexPrev != pindexBest)
{
// Pause generating during initial download
if (GetTime() - nStart < 20)
{
CBlockIndex* pindexTmp;
do
{
pindexTmp = pindexBest;
Sleep(10000);
}
while (pindexTmp != pindexBest);
}
break;
}
tmp.block.nTime = pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
}
}
}
}
//////////////////////////////////////////////////////////////////////////////
//
// Actions
//
int64 GetBalance()
{
int64 nStart = GetTimeMillis();
int64 nTotal = 0;
CRITICAL_BLOCK(cs_mapWallet)
{
for (map<uint256, CWalletTx>::iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
{
CWalletTx* pcoin = &(*it).second;
if (!pcoin->IsFinal() || pcoin->fSpent)
continue;
nTotal += pcoin->GetCredit(true);
}
}
//printf("GetBalance() %"PRI64d"ms\n", GetTimeMillis() - nStart);
return nTotal;
}
bool SelectCoins(int64 nTargetValue, set<CWalletTx*>& setCoinsRet)
{
setCoinsRet.clear();
// List of values less than target
int64 nLowestLarger = INT64_MAX;
CWalletTx* pcoinLowestLarger = NULL;
vector<pair<int64, CWalletTx*> > vValue;
int64 nTotalLower = 0;
CRITICAL_BLOCK(cs_mapWallet)
{
for (map<uint256, CWalletTx>::iterator it = mapWallet.begin(); it != mapWallet.end(); ++it)
{
CWalletTx* pcoin = &(*it).second;
if (!pcoin->IsFinal() || pcoin->fSpent)
continue;
int64 n = pcoin->GetCredit();
if (n <= 0)
continue;
if (n < nTargetValue)
{
vValue.push_back(make_pair(n, pcoin));
nTotalLower += n;
}
else if (n == nTargetValue)
{
setCoinsRet.insert(pcoin);
return true;
}
else if (n < nLowestLarger)
{
nLowestLarger = n;
pcoinLowestLarger = pcoin;
}
}
}
if (nTotalLower < nTargetValue)
{
if (pcoinLowestLarger == NULL)
return false;
setCoinsRet.insert(pcoinLowestLarger);
return true;
}
// Solve subset sum by stochastic approximation
sort(vValue.rbegin(), vValue.rend());
vector<char> vfIncluded;
vector<char> vfBest(vValue.size(), true);
int64 nBest = nTotalLower;
for (int nRep = 0; nRep < 1000 && nBest != nTargetValue; nRep++)
{
vfIncluded.assign(vValue.size(), false);
int64 nTotal = 0;
bool fReachedTarget = false;
for (int nPass = 0; nPass < 2 && !fReachedTarget; nPass++)
{
for (int i = 0; i < vValue.size(); i++)
{
if (nPass == 0 ? rand() % 2 : !vfIncluded[i])
{
nTotal += vValue[i].first;
vfIncluded[i] = true;
if (nTotal >= nTargetValue)
{
fReachedTarget = true;
if (nTotal < nBest)
{
nBest = nTotal;
vfBest = vfIncluded;
}
nTotal -= vValue[i].first;
vfIncluded[i] = false;
}
}
}
}
}
// If the next larger is still closer, return it
if (pcoinLowestLarger && nLowestLarger - nTargetValue <= nBest - nTargetValue)
setCoinsRet.insert(pcoinLowestLarger);
else
{
for (int i = 0; i < vValue.size(); i++)
if (vfBest[i])
setCoinsRet.insert(vValue[i].second);
//// debug print
printf("SelectCoins() best subset: ");
for (int i = 0; i < vValue.size(); i++)
if (vfBest[i])
printf("%s ", FormatMoney(vValue[i].first).c_str());
printf("total %s\n", FormatMoney(nBest).c_str());
}
return true;
}
bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CKey& keyRet, int64& nFeeRequiredRet)
{
nFeeRequiredRet = 0;
CRITICAL_BLOCK(cs_main)
{
// txdb must be opened before the mapWallet lock
CTxDB txdb("r");
CRITICAL_BLOCK(cs_mapWallet)
{
int64 nFee = nTransactionFee;
loop
{
wtxNew.vin.clear();
wtxNew.vout.clear();
if (nValue < 0)
return false;
int64 nValueOut = nValue;
int64 nTotalValue = nValue + nFee;
// Choose coins to use
set<CWalletTx*> setCoins;
if (!SelectCoins(nTotalValue, setCoins))
return false;
int64 nValueIn = 0;
foreach(CWalletTx* pcoin, setCoins)
nValueIn += pcoin->GetCredit();
// Fill a vout to the payee
bool fChangeFirst = GetRand(2);
if (!fChangeFirst)
wtxNew.vout.push_back(CTxOut(nValueOut, scriptPubKey));
// Fill a vout back to self with any change
if (nValueIn > nTotalValue)
{
// New private key
if (keyRet.IsNull())
keyRet.MakeNewKey();
// Fill a vout to ourself
CScript scriptPubKey;
scriptPubKey << keyRet.GetPubKey() << OP_CHECKSIG;
wtxNew.vout.push_back(CTxOut(nValueIn - nTotalValue, scriptPubKey));
}
// Fill a vout to the payee
if (fChangeFirst)
wtxNew.vout.push_back(CTxOut(nValueOut, scriptPubKey));
// Fill vin
foreach(CWalletTx* pcoin, setCoins)
for (int nOut = 0; nOut < pcoin->vout.size(); nOut++)
if (pcoin->vout[nOut].IsMine())
wtxNew.vin.push_back(CTxIn(pcoin->GetHash(), nOut));
// Sign
int nIn = 0;
foreach(CWalletTx* pcoin, setCoins)
for (int nOut = 0; nOut < pcoin->vout.size(); nOut++)
if (pcoin->vout[nOut].IsMine())
SignSignature(*pcoin, wtxNew, nIn++);
// Check that enough fee is included
if (nFee < wtxNew.GetMinFee())
{
nFee = nFeeRequiredRet = wtxNew.GetMinFee();
continue;
}
// Fill vtxPrev by copying from previous transactions vtxPrev
wtxNew.AddSupportingTransactions(txdb);
wtxNew.fTimeReceivedIsTxTime = true;
break;
}
}
}
return true;
}
// Call after CreateTransaction unless you want to abort
bool CommitTransactionSpent(const CWalletTx& wtxNew, const CKey& key)
{
CRITICAL_BLOCK(cs_main)
CRITICAL_BLOCK(cs_mapWallet)
{
//// old: eventually should make this transactional, never want to add a
//// transaction without marking spent transactions, although the risk of
//// interruption during this step is remote.
//// update: This matters even less now that fSpent can get corrected
//// when transactions are seen in VerifySignature. The remote chance of
//// unmarked fSpent will be handled by that. Don't need to make this
//// transactional.
// This is only to keep the database open to defeat the auto-flush for the
// duration of this scope. This is the only place where this optimization
// maybe makes sense; please don't do it anywhere else.
CWalletDB walletdb("r");
// Add the change's private key to wallet
if (!key.IsNull() && !AddKey(key))
throw runtime_error("CommitTransactionSpent() : AddKey failed\n");
// Add tx to wallet, because if it has change it's also ours,
// otherwise just for transaction history.
AddToWallet(wtxNew);
// Mark old coins as spent
set<CWalletTx*> setCoins;
foreach(const CTxIn& txin, wtxNew.vin)
setCoins.insert(&mapWallet[txin.prevout.hash]);
foreach(CWalletTx* pcoin, setCoins)
{
pcoin->fSpent = true;
pcoin->WriteToDisk();
vWalletUpdated.push_back(pcoin->GetHash());
}
}
MainFrameRepaint();
return true;
}
bool SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew)
{
CRITICAL_BLOCK(cs_main)
{
CKey key;
int64 nFeeRequired;
if (!CreateTransaction(scriptPubKey, nValue, wtxNew, key, nFeeRequired))
{
string strError;
if (nValue + nFeeRequired > GetBalance())
strError = strprintf("Error: This is an oversized transaction that requires a transaction fee of %s ", FormatMoney(nFeeRequired).c_str());
else
strError = "Error: Transaction creation failed ";
wxMessageBox(strError, "Sending...");
return error("SendMoney() : %s", strError.c_str());
}
if (!CommitTransactionSpent(wtxNew, key))
{
wxMessageBox("Error finalizing transaction ", "Sending...");
return error("SendMoney() : Error finalizing transaction");
}
// Track how many getdata requests our transaction gets
CRITICAL_BLOCK(cs_mapRequestCount)
mapRequestCount[wtxNew.GetHash()] = 0;
printf("SendMoney: %s\n", wtxNew.GetHash().ToString().substr(0,6).c_str());
// Broadcast
if (!wtxNew.AcceptTransaction())
{
// This must not fail. The transaction has already been signed and recorded.
wxMessageBox("Error: The transaction was rejected. This might happen if some of the coins in your wallet were already spent, such as if you used a copy of wallet.dat and coins were spent in the copy but not marked as spent here.", "Sending...");
return error("SendMoney() : Error: Transaction not valid");
}
wtxNew.RelayWalletTransaction();
}
MainFrameRepaint();
return true;
}
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