4291 lines
144 KiB
C++
4291 lines
144 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2012 The Bitcoin developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include "alert.h"
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#include "checkpoints.h"
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#include "db.h"
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#include "txdb.h"
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#include "net.h"
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#include "init.h"
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#include "ui_interface.h"
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#include <boost/algorithm/string/replace.hpp>
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#include <boost/filesystem.hpp>
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#include <boost/filesystem/fstream.hpp>
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using namespace std;
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using namespace boost;
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//
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// Global state
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//
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CCriticalSection cs_setpwalletRegistered;
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set<CWallet*> setpwalletRegistered;
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CCriticalSection cs_main;
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CTxMemPool mempool;
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unsigned int nTransactionsUpdated = 0;
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map<uint256, CBlockIndex*> mapBlockIndex;
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uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
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static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
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CBlockIndex* pindexGenesisBlock = NULL;
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int nBestHeight = -1;
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CBigNum bnBestChainWork = 0;
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CBigNum bnBestInvalidWork = 0;
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uint256 hashBestChain = 0;
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CBlockIndex* pindexBest = NULL;
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set<CBlockIndex*, CBlockIndexWorkComparator> setBlockIndexValid; // may contain all CBlockIndex*'s that have validness >=BLOCK_VALID_TRANSACTIONS, and must contain those who aren't failed
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int64 nTimeBestReceived = 0;
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bool fImporting = false;
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bool fReindex = false;
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unsigned int nCoinCacheSize = 5000;
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CMedianFilter<int> cPeerBlockCounts(5, 0); // Amount of blocks that other nodes claim to have
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map<uint256, CBlock*> mapOrphanBlocks;
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multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
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map<uint256, CDataStream*> mapOrphanTransactions;
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map<uint256, map<uint256, CDataStream*> > mapOrphanTransactionsByPrev;
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// Constant stuff for coinbase transactions we create:
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CScript COINBASE_FLAGS;
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const string strMessageMagic = "Bitcoin Signed Message:\n";
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double dHashesPerSec;
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int64 nHPSTimerStart;
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// Settings
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int64 nTransactionFee = 0;
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//////////////////////////////////////////////////////////////////////////////
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//
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// dispatching functions
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//
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// These functions dispatch to one or all registered wallets
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void RegisterWallet(CWallet* pwalletIn)
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{
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{
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LOCK(cs_setpwalletRegistered);
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setpwalletRegistered.insert(pwalletIn);
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}
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}
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void UnregisterWallet(CWallet* pwalletIn)
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{
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{
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LOCK(cs_setpwalletRegistered);
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setpwalletRegistered.erase(pwalletIn);
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}
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}
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// check whether the passed transaction is from us
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bool static IsFromMe(CTransaction& tx)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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if (pwallet->IsFromMe(tx))
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return true;
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return false;
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}
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// get the wallet transaction with the given hash (if it exists)
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bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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if (pwallet->GetTransaction(hashTx,wtx))
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return true;
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return false;
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}
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// erases transaction with the given hash from all wallets
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void static EraseFromWallets(uint256 hash)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->EraseFromWallet(hash);
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}
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// make sure all wallets know about the given transaction, in the given block
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void SyncWithWallets(const uint256 &hash, const CTransaction& tx, const CBlock* pblock, bool fUpdate)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->AddToWalletIfInvolvingMe(hash, tx, pblock, fUpdate);
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}
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// notify wallets about a new best chain
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void static SetBestChain(const CBlockLocator& loc)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->SetBestChain(loc);
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}
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// notify wallets about an updated transaction
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void static UpdatedTransaction(const uint256& hashTx)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->UpdatedTransaction(hashTx);
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}
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// dump all wallets
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void static PrintWallets(const CBlock& block)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->PrintWallet(block);
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}
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// notify wallets about an incoming inventory (for request counts)
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void static Inventory(const uint256& hash)
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->Inventory(hash);
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}
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// ask wallets to resend their transactions
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void static ResendWalletTransactions()
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{
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BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
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pwallet->ResendWalletTransactions();
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// CCoinsView implementations
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//
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bool CCoinsView::GetCoins(uint256 txid, CCoins &coins) { return false; }
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bool CCoinsView::SetCoins(uint256 txid, const CCoins &coins) { return false; }
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bool CCoinsView::HaveCoins(uint256 txid) { return false; }
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CBlockIndex *CCoinsView::GetBestBlock() { return NULL; }
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bool CCoinsView::SetBestBlock(CBlockIndex *pindex) { return false; }
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bool CCoinsView::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) { return false; }
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bool CCoinsView::GetStats(CCoinsStats &stats) { return false; }
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CCoinsViewBacked::CCoinsViewBacked(CCoinsView &viewIn) : base(&viewIn) { }
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bool CCoinsViewBacked::GetCoins(uint256 txid, CCoins &coins) { return base->GetCoins(txid, coins); }
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bool CCoinsViewBacked::SetCoins(uint256 txid, const CCoins &coins) { return base->SetCoins(txid, coins); }
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bool CCoinsViewBacked::HaveCoins(uint256 txid) { return base->HaveCoins(txid); }
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CBlockIndex *CCoinsViewBacked::GetBestBlock() { return base->GetBestBlock(); }
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bool CCoinsViewBacked::SetBestBlock(CBlockIndex *pindex) { return base->SetBestBlock(pindex); }
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void CCoinsViewBacked::SetBackend(CCoinsView &viewIn) { base = &viewIn; }
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bool CCoinsViewBacked::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) { return base->BatchWrite(mapCoins, pindex); }
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bool CCoinsViewBacked::GetStats(CCoinsStats &stats) { return base->GetStats(stats); }
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CCoinsViewCache::CCoinsViewCache(CCoinsView &baseIn, bool fDummy) : CCoinsViewBacked(baseIn), pindexTip(NULL) { }
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bool CCoinsViewCache::GetCoins(uint256 txid, CCoins &coins) {
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if (cacheCoins.count(txid)) {
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coins = cacheCoins[txid];
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return true;
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}
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if (base->GetCoins(txid, coins)) {
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cacheCoins[txid] = coins;
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return true;
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}
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return false;
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}
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std::map<uint256,CCoins>::iterator CCoinsViewCache::FetchCoins(uint256 txid) {
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std::map<uint256,CCoins>::iterator it = cacheCoins.find(txid);
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if (it != cacheCoins.end())
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return it;
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CCoins tmp;
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if (!base->GetCoins(txid,tmp))
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return it;
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std::pair<std::map<uint256,CCoins>::iterator,bool> ret = cacheCoins.insert(std::make_pair(txid, tmp));
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return ret.first;
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}
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CCoins &CCoinsViewCache::GetCoins(uint256 txid) {
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std::map<uint256,CCoins>::iterator it = FetchCoins(txid);
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assert(it != cacheCoins.end());
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return it->second;
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}
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bool CCoinsViewCache::SetCoins(uint256 txid, const CCoins &coins) {
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cacheCoins[txid] = coins;
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return true;
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}
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bool CCoinsViewCache::HaveCoins(uint256 txid) {
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return FetchCoins(txid) != cacheCoins.end();
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}
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CBlockIndex *CCoinsViewCache::GetBestBlock() {
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if (pindexTip == NULL)
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pindexTip = base->GetBestBlock();
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return pindexTip;
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}
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bool CCoinsViewCache::SetBestBlock(CBlockIndex *pindex) {
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pindexTip = pindex;
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return true;
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}
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bool CCoinsViewCache::BatchWrite(const std::map<uint256, CCoins> &mapCoins, CBlockIndex *pindex) {
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for (std::map<uint256, CCoins>::const_iterator it = mapCoins.begin(); it != mapCoins.end(); it++)
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cacheCoins[it->first] = it->second;
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pindexTip = pindex;
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return true;
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}
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bool CCoinsViewCache::Flush() {
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bool fOk = base->BatchWrite(cacheCoins, pindexTip);
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if (fOk)
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cacheCoins.clear();
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return fOk;
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}
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unsigned int CCoinsViewCache::GetCacheSize() {
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return cacheCoins.size();
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}
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/** CCoinsView that brings transactions from a memorypool into view.
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It does not check for spendings by memory pool transactions. */
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CCoinsViewMemPool::CCoinsViewMemPool(CCoinsView &baseIn, CTxMemPool &mempoolIn) : CCoinsViewBacked(baseIn), mempool(mempoolIn) { }
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bool CCoinsViewMemPool::GetCoins(uint256 txid, CCoins &coins) {
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if (base->GetCoins(txid, coins))
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return true;
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if (mempool.exists(txid)) {
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const CTransaction &tx = mempool.lookup(txid);
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coins = CCoins(tx, MEMPOOL_HEIGHT);
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return true;
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}
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return false;
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}
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bool CCoinsViewMemPool::HaveCoins(uint256 txid) {
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return mempool.exists(txid) || base->HaveCoins(txid);
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}
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CCoinsViewCache *pcoinsTip = NULL;
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CBlockTreeDB *pblocktree = NULL;
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//////////////////////////////////////////////////////////////////////////////
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//
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// mapOrphanTransactions
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//
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bool AddOrphanTx(const CDataStream& vMsg)
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{
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CTransaction tx;
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CDataStream(vMsg) >> tx;
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uint256 hash = tx.GetHash();
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if (mapOrphanTransactions.count(hash))
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return false;
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CDataStream* pvMsg = new CDataStream(vMsg);
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// Ignore big transactions, to avoid a
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// send-big-orphans memory exhaustion attack. If a peer has a legitimate
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// large transaction with a missing parent then we assume
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// it will rebroadcast it later, after the parent transaction(s)
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// have been mined or received.
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// 10,000 orphans, each of which is at most 5,000 bytes big is
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// at most 500 megabytes of orphans:
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if (pvMsg->size() > 5000)
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{
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printf("ignoring large orphan tx (size: %"PRIszu", hash: %s)\n", pvMsg->size(), hash.ToString().substr(0,10).c_str());
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delete pvMsg;
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return false;
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}
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mapOrphanTransactions[hash] = pvMsg;
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BOOST_FOREACH(const CTxIn& txin, tx.vin)
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mapOrphanTransactionsByPrev[txin.prevout.hash].insert(make_pair(hash, pvMsg));
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printf("stored orphan tx %s (mapsz %"PRIszu")\n", hash.ToString().substr(0,10).c_str(),
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mapOrphanTransactions.size());
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return true;
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}
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void static EraseOrphanTx(uint256 hash)
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{
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if (!mapOrphanTransactions.count(hash))
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return;
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const CDataStream* pvMsg = mapOrphanTransactions[hash];
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CTransaction tx;
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CDataStream(*pvMsg) >> tx;
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BOOST_FOREACH(const CTxIn& txin, tx.vin)
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{
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mapOrphanTransactionsByPrev[txin.prevout.hash].erase(hash);
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if (mapOrphanTransactionsByPrev[txin.prevout.hash].empty())
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mapOrphanTransactionsByPrev.erase(txin.prevout.hash);
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}
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delete pvMsg;
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mapOrphanTransactions.erase(hash);
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}
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unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans)
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{
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unsigned int nEvicted = 0;
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while (mapOrphanTransactions.size() > nMaxOrphans)
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{
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// Evict a random orphan:
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uint256 randomhash = GetRandHash();
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map<uint256, CDataStream*>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
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if (it == mapOrphanTransactions.end())
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it = mapOrphanTransactions.begin();
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EraseOrphanTx(it->first);
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++nEvicted;
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}
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return nEvicted;
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}
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//////////////////////////////////////////////////////////////////////////////
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//
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// CTransaction
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//
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bool CTransaction::IsStandard() const
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{
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if (nVersion > CTransaction::CURRENT_VERSION)
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return false;
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BOOST_FOREACH(const CTxIn& txin, vin)
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{
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// Biggest 'standard' txin is a 3-signature 3-of-3 CHECKMULTISIG
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// pay-to-script-hash, which is 3 ~80-byte signatures, 3
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// ~65-byte public keys, plus a few script ops.
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if (txin.scriptSig.size() > 500)
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return false;
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if (!txin.scriptSig.IsPushOnly())
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return false;
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}
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BOOST_FOREACH(const CTxOut& txout, vout) {
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if (!::IsStandard(txout.scriptPubKey))
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return false;
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if (txout.nValue == 0)
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return false;
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}
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return true;
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}
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//
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// Check transaction inputs, and make sure any
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// pay-to-script-hash transactions are evaluating IsStandard scripts
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//
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// Why bother? To avoid denial-of-service attacks; an attacker
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// can submit a standard HASH... OP_EQUAL transaction,
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// which will get accepted into blocks. The redemption
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// script can be anything; an attacker could use a very
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// expensive-to-check-upon-redemption script like:
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// DUP CHECKSIG DROP ... repeated 100 times... OP_1
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//
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bool CTransaction::AreInputsStandard(CCoinsViewCache& mapInputs) const
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{
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if (IsCoinBase())
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return true; // Coinbases don't use vin normally
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for (unsigned int i = 0; i < vin.size(); i++)
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{
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const CTxOut& prev = GetOutputFor(vin[i], mapInputs);
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vector<vector<unsigned char> > vSolutions;
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txnouttype whichType;
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// get the scriptPubKey corresponding to this input:
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const CScript& prevScript = prev.scriptPubKey;
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if (!Solver(prevScript, whichType, vSolutions))
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return false;
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int nArgsExpected = ScriptSigArgsExpected(whichType, vSolutions);
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if (nArgsExpected < 0)
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return false;
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// Transactions with extra stuff in their scriptSigs are
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// non-standard. Note that this EvalScript() call will
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// be quick, because if there are any operations
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// beside "push data" in the scriptSig the
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// IsStandard() call returns false
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vector<vector<unsigned char> > stack;
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if (!EvalScript(stack, vin[i].scriptSig, *this, i, false, 0))
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return false;
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if (whichType == TX_SCRIPTHASH)
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{
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if (stack.empty())
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return false;
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CScript subscript(stack.back().begin(), stack.back().end());
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vector<vector<unsigned char> > vSolutions2;
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txnouttype whichType2;
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if (!Solver(subscript, whichType2, vSolutions2))
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return false;
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if (whichType2 == TX_SCRIPTHASH)
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return false;
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int tmpExpected;
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tmpExpected = ScriptSigArgsExpected(whichType2, vSolutions2);
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if (tmpExpected < 0)
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return false;
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nArgsExpected += tmpExpected;
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}
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if (stack.size() != (unsigned int)nArgsExpected)
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return false;
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}
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return true;
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}
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unsigned int
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CTransaction::GetLegacySigOpCount() const
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{
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unsigned int nSigOps = 0;
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BOOST_FOREACH(const CTxIn& txin, vin)
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{
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nSigOps += txin.scriptSig.GetSigOpCount(false);
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}
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BOOST_FOREACH(const CTxOut& txout, vout)
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{
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nSigOps += txout.scriptPubKey.GetSigOpCount(false);
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}
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return nSigOps;
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}
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int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
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{
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if (fClient)
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{
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if (hashBlock == 0)
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return 0;
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}
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else
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{
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CBlock blockTmp;
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if (pblock == NULL) {
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CCoins coins;
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if (pcoinsTip->GetCoins(GetHash(), coins)) {
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CBlockIndex *pindex = FindBlockByHeight(coins.nHeight);
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if (pindex) {
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if (!blockTmp.ReadFromDisk(pindex))
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return 0;
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pblock = &blockTmp;
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}
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}
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}
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if (pblock) {
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// Update the tx's hashBlock
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hashBlock = pblock->GetHash();
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// Locate the transaction
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for (nIndex = 0; nIndex < (int)pblock->vtx.size(); nIndex++)
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if (pblock->vtx[nIndex] == *(CTransaction*)this)
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break;
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if (nIndex == (int)pblock->vtx.size())
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{
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vMerkleBranch.clear();
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nIndex = -1;
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printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
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return 0;
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}
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// Fill in merkle branch
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vMerkleBranch = pblock->GetMerkleBranch(nIndex);
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}
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
bool CTransaction::CheckTransaction() const
|
|
{
|
|
// Basic checks that don't depend on any context
|
|
if (vin.empty())
|
|
return DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
|
|
if (vout.empty())
|
|
return DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
|
|
// Size limits
|
|
if (::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
|
|
return 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 DoS(100, error("CTransaction::CheckTransaction() : txout.nValue negative"));
|
|
if (txout.nValue > MAX_MONEY)
|
|
return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
|
|
nValueOut += txout.nValue;
|
|
if (!MoneyRange(nValueOut))
|
|
return 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 false;
|
|
vInOutPoints.insert(txin.prevout);
|
|
}
|
|
|
|
if (IsCoinBase())
|
|
{
|
|
if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
|
|
return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size"));
|
|
}
|
|
else
|
|
{
|
|
BOOST_FOREACH(const CTxIn& txin, vin)
|
|
if (txin.prevout.IsNull())
|
|
return DoS(10, error("CTransaction::CheckTransaction() : prevout is null"));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int64 CTransaction::GetMinFee(unsigned int nBlockSize, bool fAllowFree,
|
|
enum GetMinFee_mode mode) const
|
|
{
|
|
// Base fee is either MIN_TX_FEE or MIN_RELAY_TX_FEE
|
|
int64 nBaseFee = (mode == GMF_RELAY) ? MIN_RELAY_TX_FEE : MIN_TX_FEE;
|
|
|
|
unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION);
|
|
unsigned int nNewBlockSize = nBlockSize + nBytes;
|
|
int64 nMinFee = (1 + (int64)nBytes / 1000) * nBaseFee;
|
|
|
|
if (fAllowFree)
|
|
{
|
|
if (nBlockSize == 1)
|
|
{
|
|
// Transactions under 10K are free
|
|
// (about 4500 BTC if made of 50 BTC inputs)
|
|
if (nBytes < 10000)
|
|
nMinFee = 0;
|
|
}
|
|
else
|
|
{
|
|
// Free transaction area
|
|
if (nNewBlockSize < 27000)
|
|
nMinFee = 0;
|
|
}
|
|
}
|
|
|
|
// To limit dust spam, require MIN_TX_FEE/MIN_RELAY_TX_FEE if any output is less than 0.01
|
|
if (nMinFee < nBaseFee)
|
|
{
|
|
BOOST_FOREACH(const CTxOut& txout, vout)
|
|
if (txout.nValue < CENT)
|
|
nMinFee = nBaseFee;
|
|
}
|
|
|
|
// Raise the price as the block approaches full
|
|
if (nBlockSize != 1 && nNewBlockSize >= MAX_BLOCK_SIZE_GEN/2)
|
|
{
|
|
if (nNewBlockSize >= MAX_BLOCK_SIZE_GEN)
|
|
return MAX_MONEY;
|
|
nMinFee *= MAX_BLOCK_SIZE_GEN / (MAX_BLOCK_SIZE_GEN - nNewBlockSize);
|
|
}
|
|
|
|
if (!MoneyRange(nMinFee))
|
|
nMinFee = MAX_MONEY;
|
|
return nMinFee;
|
|
}
|
|
|
|
void CTxMemPool::pruneSpent(const uint256 &hashTx, CCoins &coins)
|
|
{
|
|
LOCK(cs);
|
|
|
|
std::map<COutPoint, CInPoint>::iterator it = mapNextTx.lower_bound(COutPoint(hashTx, 0));
|
|
|
|
// iterate over all COutPoints in mapNextTx whose hash equals the provided hashTx
|
|
while (it != mapNextTx.end() && it->first.hash == hashTx) {
|
|
coins.Spend(it->first.n); // and remove those outputs from coins
|
|
it++;
|
|
}
|
|
}
|
|
|
|
bool CTxMemPool::accept(CTransaction &tx, bool fCheckInputs,
|
|
bool* pfMissingInputs)
|
|
{
|
|
if (pfMissingInputs)
|
|
*pfMissingInputs = false;
|
|
|
|
if (!tx.CheckTransaction())
|
|
return error("CTxMemPool::accept() : CheckTransaction failed");
|
|
|
|
// Coinbase is only valid in a block, not as a loose transaction
|
|
if (tx.IsCoinBase())
|
|
return tx.DoS(100, error("CTxMemPool::accept() : coinbase as individual tx"));
|
|
|
|
// To help v0.1.5 clients who would see it as a negative number
|
|
if ((int64)tx.nLockTime > std::numeric_limits<int>::max())
|
|
return error("CTxMemPool::accept() : not accepting nLockTime beyond 2038 yet");
|
|
|
|
// Rather not work on nonstandard transactions (unless -testnet)
|
|
if (!fTestNet && !tx.IsStandard())
|
|
return error("CTxMemPool::accept() : nonstandard transaction type");
|
|
|
|
// is it already in the memory pool?
|
|
uint256 hash = tx.GetHash();
|
|
{
|
|
LOCK(cs);
|
|
if (mapTx.count(hash))
|
|
return false;
|
|
}
|
|
|
|
// Check for conflicts with in-memory transactions
|
|
CTransaction* ptxOld = NULL;
|
|
for (unsigned int i = 0; i < tx.vin.size(); i++)
|
|
{
|
|
COutPoint outpoint = tx.vin[i].prevout;
|
|
if (mapNextTx.count(outpoint))
|
|
{
|
|
// Disable replacement feature for now
|
|
return false;
|
|
|
|
// Allow replacing with a newer version of the same transaction
|
|
if (i != 0)
|
|
return false;
|
|
ptxOld = mapNextTx[outpoint].ptx;
|
|
if (ptxOld->IsFinal())
|
|
return false;
|
|
if (!tx.IsNewerThan(*ptxOld))
|
|
return false;
|
|
for (unsigned int i = 0; i < tx.vin.size(); i++)
|
|
{
|
|
COutPoint outpoint = tx.vin[i].prevout;
|
|
if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
|
|
return false;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (fCheckInputs)
|
|
{
|
|
CCoinsView dummy;
|
|
CCoinsViewCache view(dummy);
|
|
|
|
{
|
|
LOCK(cs);
|
|
CCoinsViewMemPool viewMemPool(*pcoinsTip, *this);
|
|
view.SetBackend(viewMemPool);
|
|
|
|
// do we already have it?
|
|
if (view.HaveCoins(hash))
|
|
return false;
|
|
|
|
// do all inputs exist?
|
|
// Note that this does not check for the presence of actual outputs (see the next check for that),
|
|
// only helps filling in pfMissingInputs (to determine missing vs spent).
|
|
BOOST_FOREACH(const CTxIn txin, tx.vin) {
|
|
if (!view.HaveCoins(txin.prevout.hash)) {
|
|
if (pfMissingInputs)
|
|
*pfMissingInputs = true;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// are the actual inputs available?
|
|
if (!tx.HaveInputs(view))
|
|
return error("CTxMemPool::accept() : inputs already spent");
|
|
|
|
// Bring the best block into scope
|
|
view.GetBestBlock();
|
|
|
|
// we have all inputs cached now, so switch back to dummy, so we don't need to keep lock on mempool
|
|
view.SetBackend(dummy);
|
|
}
|
|
|
|
// Check for non-standard pay-to-script-hash in inputs
|
|
if (!tx.AreInputsStandard(view) && !fTestNet)
|
|
return error("CTxMemPool::accept() : nonstandard transaction input");
|
|
|
|
// Note: if you modify this code to accept non-standard transactions, then
|
|
// you should add code here to check that the transaction does a
|
|
// reasonable number of ECDSA signature verifications.
|
|
|
|
int64 nFees = tx.GetValueIn(view)-tx.GetValueOut();
|
|
unsigned int nSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
|
|
|
|
// Don't accept it if it can't get into a block
|
|
int64 txMinFee = tx.GetMinFee(1000, true, GMF_RELAY);
|
|
if (nFees < txMinFee)
|
|
return error("CTxMemPool::accept() : not enough fees %s, %"PRI64d" < %"PRI64d,
|
|
hash.ToString().c_str(),
|
|
nFees, txMinFee);
|
|
|
|
// Continuously rate-limit free transactions
|
|
// This mitigates 'penny-flooding' -- sending thousands of free transactions just to
|
|
// be annoying or make others' transactions take longer to confirm.
|
|
if (nFees < MIN_RELAY_TX_FEE)
|
|
{
|
|
static CCriticalSection cs;
|
|
static double dFreeCount;
|
|
static int64 nLastTime;
|
|
int64 nNow = GetTime();
|
|
|
|
{
|
|
// Use an exponentially decaying ~10-minute window:
|
|
dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
|
|
nLastTime = nNow;
|
|
// -limitfreerelay unit is thousand-bytes-per-minute
|
|
// At default rate it would take over a month to fill 1GB
|
|
if (dFreeCount > GetArg("-limitfreerelay", 15)*10*1000 && !IsFromMe(tx))
|
|
return error("CTxMemPool::accept() : free transaction rejected by rate limiter");
|
|
if (fDebug)
|
|
printf("Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
|
|
dFreeCount += nSize;
|
|
}
|
|
}
|
|
|
|
// Check against previous transactions
|
|
// This is done last to help prevent CPU exhaustion denial-of-service attacks.
|
|
if (!tx.CheckInputs(view, CS_ALWAYS, SCRIPT_VERIFY_P2SH))
|
|
{
|
|
return error("CTxMemPool::accept() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
|
|
}
|
|
}
|
|
|
|
// Store transaction in memory
|
|
{
|
|
LOCK(cs);
|
|
if (ptxOld)
|
|
{
|
|
printf("CTxMemPool::accept() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
|
|
remove(*ptxOld);
|
|
}
|
|
addUnchecked(hash, tx);
|
|
}
|
|
|
|
///// are we sure this is ok when loading transactions or restoring block txes
|
|
// If updated, erase old tx from wallet
|
|
if (ptxOld)
|
|
EraseFromWallets(ptxOld->GetHash());
|
|
|
|
printf("CTxMemPool::accept() : accepted %s (poolsz %"PRIszu")\n",
|
|
hash.ToString().substr(0,10).c_str(),
|
|
mapTx.size());
|
|
return true;
|
|
}
|
|
|
|
bool CTransaction::AcceptToMemoryPool(bool fCheckInputs, bool* pfMissingInputs)
|
|
{
|
|
return mempool.accept(*this, fCheckInputs, pfMissingInputs);
|
|
}
|
|
|
|
bool CTxMemPool::addUnchecked(const uint256& hash, CTransaction &tx)
|
|
{
|
|
// Add to memory pool without checking anything. Don't call this directly,
|
|
// call CTxMemPool::accept to properly check the transaction first.
|
|
{
|
|
mapTx[hash] = tx;
|
|
for (unsigned int i = 0; i < tx.vin.size(); i++)
|
|
mapNextTx[tx.vin[i].prevout] = CInPoint(&mapTx[hash], i);
|
|
nTransactionsUpdated++;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
bool CTxMemPool::remove(CTransaction &tx)
|
|
{
|
|
// Remove transaction from memory pool
|
|
{
|
|
LOCK(cs);
|
|
uint256 hash = tx.GetHash();
|
|
if (mapTx.count(hash))
|
|
{
|
|
BOOST_FOREACH(const CTxIn& txin, tx.vin)
|
|
mapNextTx.erase(txin.prevout);
|
|
mapTx.erase(hash);
|
|
nTransactionsUpdated++;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void CTxMemPool::clear()
|
|
{
|
|
LOCK(cs);
|
|
mapTx.clear();
|
|
mapNextTx.clear();
|
|
++nTransactionsUpdated;
|
|
}
|
|
|
|
void CTxMemPool::queryHashes(std::vector<uint256>& vtxid)
|
|
{
|
|
vtxid.clear();
|
|
|
|
LOCK(cs);
|
|
vtxid.reserve(mapTx.size());
|
|
for (map<uint256, CTransaction>::iterator mi = mapTx.begin(); mi != mapTx.end(); ++mi)
|
|
vtxid.push_back((*mi).first);
|
|
}
|
|
|
|
|
|
|
|
|
|
int CMerkleTx::GetDepthInMainChain(CBlockIndex* &pindexRet) 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;
|
|
}
|
|
|
|
pindexRet = pindex;
|
|
return pindexBest->nHeight - pindex->nHeight + 1;
|
|
}
|
|
|
|
|
|
int CMerkleTx::GetBlocksToMaturity() const
|
|
{
|
|
if (!IsCoinBase())
|
|
return 0;
|
|
return max(0, (COINBASE_MATURITY+20) - GetDepthInMainChain());
|
|
}
|
|
|
|
|
|
bool CMerkleTx::AcceptToMemoryPool(bool fCheckInputs)
|
|
{
|
|
if (fClient)
|
|
{
|
|
if (!IsInMainChain() && !ClientCheckInputs())
|
|
return false;
|
|
return CTransaction::AcceptToMemoryPool(false);
|
|
}
|
|
else
|
|
{
|
|
return CTransaction::AcceptToMemoryPool(fCheckInputs);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
bool CWalletTx::AcceptWalletTransaction(bool fCheckInputs)
|
|
{
|
|
{
|
|
LOCK(mempool.cs);
|
|
// Add previous supporting transactions first
|
|
BOOST_FOREACH(CMerkleTx& tx, vtxPrev)
|
|
{
|
|
if (!tx.IsCoinBase())
|
|
{
|
|
uint256 hash = tx.GetHash();
|
|
if (!mempool.exists(hash) && pcoinsTip->HaveCoins(hash))
|
|
tx.AcceptToMemoryPool(fCheckInputs);
|
|
}
|
|
}
|
|
return AcceptToMemoryPool(fCheckInputs);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// Return transaction in tx, and if it was found inside a block, its hash is placed in hashBlock
|
|
bool GetTransaction(const uint256 &hash, CTransaction &txOut, uint256 &hashBlock, bool fAllowSlow)
|
|
{
|
|
CBlockIndex *pindexSlow = NULL;
|
|
{
|
|
LOCK(cs_main);
|
|
{
|
|
LOCK(mempool.cs);
|
|
if (mempool.exists(hash))
|
|
{
|
|
txOut = mempool.lookup(hash);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
if (fAllowSlow) { // use coin database to locate block that contains transaction, and scan it
|
|
int nHeight = -1;
|
|
{
|
|
CCoinsViewCache &view = *pcoinsTip;
|
|
CCoins coins;
|
|
if (view.GetCoins(hash, coins))
|
|
nHeight = coins.nHeight;
|
|
}
|
|
if (nHeight > 0)
|
|
pindexSlow = FindBlockByHeight(nHeight);
|
|
}
|
|
}
|
|
|
|
if (pindexSlow) {
|
|
CBlock block;
|
|
if (block.ReadFromDisk(pindexSlow)) {
|
|
BOOST_FOREACH(const CTransaction &tx, block.vtx) {
|
|
if (tx.GetHash() == hash) {
|
|
txOut = tx;
|
|
hashBlock = pindexSlow->GetBlockHash();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// CBlock and CBlockIndex
|
|
//
|
|
|
|
static CBlockIndex* pblockindexFBBHLast;
|
|
CBlockIndex* FindBlockByHeight(int nHeight)
|
|
{
|
|
CBlockIndex *pblockindex;
|
|
if (nHeight < nBestHeight / 2)
|
|
pblockindex = pindexGenesisBlock;
|
|
else
|
|
pblockindex = pindexBest;
|
|
if (pblockindexFBBHLast && abs(nHeight - pblockindex->nHeight) > abs(nHeight - pblockindexFBBHLast->nHeight))
|
|
pblockindex = pblockindexFBBHLast;
|
|
while (pblockindex->nHeight > nHeight)
|
|
pblockindex = pblockindex->pprev;
|
|
while (pblockindex->nHeight < nHeight)
|
|
pblockindex = pblockindex->pnext;
|
|
pblockindexFBBHLast = pblockindex;
|
|
return pblockindex;
|
|
}
|
|
|
|
bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
|
|
{
|
|
if (!fReadTransactions)
|
|
{
|
|
*this = pindex->GetBlockHeader();
|
|
return true;
|
|
}
|
|
if (!ReadFromDisk(pindex->GetBlockPos(), fReadTransactions))
|
|
return false;
|
|
if (GetHash() != pindex->GetBlockHash())
|
|
return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
|
|
return true;
|
|
}
|
|
|
|
uint256 static 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 static GetBlockValue(int nHeight, int64 nFees)
|
|
{
|
|
int64 nSubsidy = 50 * COIN;
|
|
|
|
// Subsidy is cut in half every 210000 blocks, which will occur approximately every 4 years
|
|
nSubsidy >>= (nHeight / 210000);
|
|
|
|
return nSubsidy + nFees;
|
|
}
|
|
|
|
static const int64 nTargetTimespan = 14 * 24 * 60 * 60; // two weeks
|
|
static const int64 nTargetSpacing = 10 * 60;
|
|
static const int64 nInterval = nTargetTimespan / nTargetSpacing;
|
|
|
|
//
|
|
// minimum amount of work that could possibly be required nTime after
|
|
// minimum work required was nBase
|
|
//
|
|
unsigned int ComputeMinWork(unsigned int nBase, int64 nTime)
|
|
{
|
|
// Testnet has min-difficulty blocks
|
|
// after nTargetSpacing*2 time between blocks:
|
|
if (fTestNet && nTime > nTargetSpacing*2)
|
|
return bnProofOfWorkLimit.GetCompact();
|
|
|
|
CBigNum bnResult;
|
|
bnResult.SetCompact(nBase);
|
|
while (nTime > 0 && bnResult < bnProofOfWorkLimit)
|
|
{
|
|
// Maximum 400% adjustment...
|
|
bnResult *= 4;
|
|
// ... in best-case exactly 4-times-normal target time
|
|
nTime -= nTargetTimespan*4;
|
|
}
|
|
if (bnResult > bnProofOfWorkLimit)
|
|
bnResult = bnProofOfWorkLimit;
|
|
return bnResult.GetCompact();
|
|
}
|
|
|
|
unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlock *pblock)
|
|
{
|
|
unsigned int nProofOfWorkLimit = bnProofOfWorkLimit.GetCompact();
|
|
|
|
// Genesis block
|
|
if (pindexLast == NULL)
|
|
return nProofOfWorkLimit;
|
|
|
|
// Only change once per interval
|
|
if ((pindexLast->nHeight+1) % nInterval != 0)
|
|
{
|
|
// Special difficulty rule for testnet:
|
|
if (fTestNet)
|
|
{
|
|
// If the new block's timestamp is more than 2* 10 minutes
|
|
// then allow mining of a min-difficulty block.
|
|
if (pblock->nTime > pindexLast->nTime + nTargetSpacing*2)
|
|
return nProofOfWorkLimit;
|
|
else
|
|
{
|
|
// Return the last non-special-min-difficulty-rules-block
|
|
const CBlockIndex* pindex = pindexLast;
|
|
while (pindex->pprev && pindex->nHeight % nInterval != 0 && pindex->nBits == nProofOfWorkLimit)
|
|
pindex = pindex->pprev;
|
|
return pindex->nBits;
|
|
}
|
|
}
|
|
|
|
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
|
|
int64 nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime();
|
|
printf(" nActualTimespan = %"PRI64d" 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 = %"PRI64d" nActualTimespan = %"PRI64d"\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 CheckProofOfWork(uint256 hash, unsigned int nBits)
|
|
{
|
|
CBigNum bnTarget;
|
|
bnTarget.SetCompact(nBits);
|
|
|
|
// Check range
|
|
if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
|
|
return error("CheckProofOfWork() : nBits below minimum work");
|
|
|
|
// Check proof of work matches claimed amount
|
|
if (hash > bnTarget.getuint256())
|
|
return error("CheckProofOfWork() : hash doesn't match nBits");
|
|
|
|
return true;
|
|
}
|
|
|
|
// Return maximum amount of blocks that other nodes claim to have
|
|
int GetNumBlocksOfPeers()
|
|
{
|
|
return std::max(cPeerBlockCounts.median(), Checkpoints::GetTotalBlocksEstimate());
|
|
}
|
|
|
|
bool IsInitialBlockDownload()
|
|
{
|
|
if (pindexBest == NULL || nBestHeight < Checkpoints::GetTotalBlocksEstimate() || fReindex || fImporting)
|
|
return true;
|
|
static int64 nLastUpdate;
|
|
static CBlockIndex* pindexLastBest;
|
|
if (pindexBest != pindexLastBest)
|
|
{
|
|
pindexLastBest = pindexBest;
|
|
nLastUpdate = GetTime();
|
|
}
|
|
return (GetTime() - nLastUpdate < 10 &&
|
|
pindexBest->GetBlockTime() < GetTime() - 24 * 60 * 60);
|
|
}
|
|
|
|
void static InvalidChainFound(CBlockIndex* pindexNew)
|
|
{
|
|
if (pindexNew->bnChainWork > bnBestInvalidWork)
|
|
{
|
|
bnBestInvalidWork = pindexNew->bnChainWork;
|
|
pblocktree->WriteBestInvalidWork(bnBestInvalidWork);
|
|
uiInterface.NotifyBlocksChanged();
|
|
}
|
|
printf("InvalidChainFound: invalid block=%s height=%d work=%s date=%s\n",
|
|
pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight,
|
|
pindexNew->bnChainWork.ToString().c_str(), DateTimeStrFormat("%x %H:%M:%S",
|
|
pindexNew->GetBlockTime()).c_str());
|
|
printf("InvalidChainFound: current best=%s height=%d work=%s date=%s\n",
|
|
hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str(),
|
|
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
|
|
if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
|
|
printf("InvalidChainFound: Warning: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.\n");
|
|
}
|
|
|
|
void static InvalidBlockFound(CBlockIndex *pindex) {
|
|
pindex->nStatus |= BLOCK_FAILED_VALID;
|
|
pblocktree->WriteBlockIndex(CDiskBlockIndex(pindex));
|
|
setBlockIndexValid.erase(pindex);
|
|
InvalidChainFound(pindex);
|
|
if (pindex->pnext)
|
|
ConnectBestBlock(); // reorganise away from the failed block
|
|
}
|
|
|
|
bool ConnectBestBlock() {
|
|
do {
|
|
CBlockIndex *pindexNewBest;
|
|
|
|
{
|
|
std::set<CBlockIndex*,CBlockIndexWorkComparator>::reverse_iterator it = setBlockIndexValid.rbegin();
|
|
if (it == setBlockIndexValid.rend())
|
|
return true;
|
|
pindexNewBest = *it;
|
|
}
|
|
|
|
if (pindexNewBest == pindexBest)
|
|
return true; // nothing to do
|
|
|
|
// check ancestry
|
|
CBlockIndex *pindexTest = pindexNewBest;
|
|
std::vector<CBlockIndex*> vAttach;
|
|
do {
|
|
if (pindexTest->nStatus & BLOCK_FAILED_MASK) {
|
|
// mark descendants failed
|
|
CBlockIndex *pindexFailed = pindexNewBest;
|
|
while (pindexTest != pindexFailed) {
|
|
pindexFailed->nStatus |= BLOCK_FAILED_CHILD;
|
|
setBlockIndexValid.erase(pindexFailed);
|
|
pblocktree->WriteBlockIndex(CDiskBlockIndex(pindexFailed));
|
|
pindexFailed = pindexFailed->pprev;
|
|
}
|
|
InvalidChainFound(pindexNewBest);
|
|
break;
|
|
}
|
|
|
|
if (pindexBest == NULL || pindexTest->bnChainWork > pindexBest->bnChainWork)
|
|
vAttach.push_back(pindexTest);
|
|
|
|
if (pindexTest->pprev == NULL || pindexTest->pnext != NULL) {
|
|
reverse(vAttach.begin(), vAttach.end());
|
|
BOOST_FOREACH(CBlockIndex *pindexSwitch, vAttach)
|
|
if (!SetBestChain(pindexSwitch))
|
|
return false;
|
|
return true;
|
|
}
|
|
pindexTest = pindexTest->pprev;
|
|
} while(true);
|
|
} while(true);
|
|
}
|
|
|
|
void CBlock::UpdateTime(const CBlockIndex* pindexPrev)
|
|
{
|
|
nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
|
|
|
|
// Updating time can change work required on testnet:
|
|
if (fTestNet)
|
|
nBits = GetNextWorkRequired(pindexPrev, this);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
const CTxOut &CTransaction::GetOutputFor(const CTxIn& input, CCoinsViewCache& view)
|
|
{
|
|
const CCoins &coins = view.GetCoins(input.prevout.hash);
|
|
assert(coins.IsAvailable(input.prevout.n));
|
|
return coins.vout[input.prevout.n];
|
|
}
|
|
|
|
int64 CTransaction::GetValueIn(CCoinsViewCache& inputs) const
|
|
{
|
|
if (IsCoinBase())
|
|
return 0;
|
|
|
|
int64 nResult = 0;
|
|
for (unsigned int i = 0; i < vin.size(); i++)
|
|
nResult += GetOutputFor(vin[i], inputs).nValue;
|
|
|
|
return nResult;
|
|
}
|
|
|
|
unsigned int CTransaction::GetP2SHSigOpCount(CCoinsViewCache& inputs) const
|
|
{
|
|
if (IsCoinBase())
|
|
return 0;
|
|
|
|
unsigned int nSigOps = 0;
|
|
for (unsigned int i = 0; i < vin.size(); i++)
|
|
{
|
|
const CTxOut &prevout = GetOutputFor(vin[i], inputs);
|
|
if (prevout.scriptPubKey.IsPayToScriptHash())
|
|
nSigOps += prevout.scriptPubKey.GetSigOpCount(vin[i].scriptSig);
|
|
}
|
|
return nSigOps;
|
|
}
|
|
|
|
bool CTransaction::UpdateCoins(CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight, const uint256 &txhash) const
|
|
{
|
|
// mark inputs spent
|
|
if (!IsCoinBase()) {
|
|
BOOST_FOREACH(const CTxIn &txin, vin) {
|
|
CCoins &coins = inputs.GetCoins(txin.prevout.hash);
|
|
CTxInUndo undo;
|
|
if (!coins.Spend(txin.prevout, undo))
|
|
return error("UpdateCoins() : cannot spend input");
|
|
txundo.vprevout.push_back(undo);
|
|
}
|
|
}
|
|
|
|
// add outputs
|
|
if (!inputs.SetCoins(txhash, CCoins(*this, nHeight)))
|
|
return error("UpdateCoins() : cannot update output");
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CTransaction::HaveInputs(CCoinsViewCache &inputs) const
|
|
{
|
|
if (!IsCoinBase()) {
|
|
// first check whether information about the prevout hash is available
|
|
for (unsigned int i = 0; i < vin.size(); i++) {
|
|
const COutPoint &prevout = vin[i].prevout;
|
|
if (!inputs.HaveCoins(prevout.hash))
|
|
return false;
|
|
}
|
|
|
|
// then check whether the actual outputs are available
|
|
for (unsigned int i = 0; i < vin.size(); i++) {
|
|
const COutPoint &prevout = vin[i].prevout;
|
|
const CCoins &coins = inputs.GetCoins(prevout.hash);
|
|
if (!coins.IsAvailable(prevout.n))
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool CTransaction::CheckInputs(CCoinsViewCache &inputs, enum CheckSig_mode csmode, unsigned int flags) const
|
|
{
|
|
if (!IsCoinBase())
|
|
{
|
|
// This doesn't trigger the DoS code on purpose; if it did, it would make it easier
|
|
// for an attacker to attempt to split the network.
|
|
if (!HaveInputs(inputs))
|
|
return error("CheckInputs() : %s inputs unavailable", GetHash().ToString().substr(0,10).c_str());
|
|
|
|
// While checking, GetBestBlock() refers to the parent block.
|
|
// This is also true for mempool checks.
|
|
int nSpendHeight = inputs.GetBestBlock()->nHeight + 1;
|
|
int64 nValueIn = 0;
|
|
int64 nFees = 0;
|
|
for (unsigned int i = 0; i < vin.size(); i++)
|
|
{
|
|
const COutPoint &prevout = vin[i].prevout;
|
|
const CCoins &coins = inputs.GetCoins(prevout.hash);
|
|
|
|
// If prev is coinbase, check that it's matured
|
|
if (coins.IsCoinBase()) {
|
|
if (nSpendHeight - coins.nHeight < COINBASE_MATURITY)
|
|
return error("CheckInputs() : tried to spend coinbase at depth %d", nSpendHeight - coins.nHeight);
|
|
}
|
|
|
|
// Check for negative or overflow input values
|
|
nValueIn += coins.vout[prevout.n].nValue;
|
|
if (!MoneyRange(coins.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
|
|
return DoS(100, error("CheckInputs() : txin values out of range"));
|
|
|
|
}
|
|
|
|
if (nValueIn < GetValueOut())
|
|
return DoS(100, error("ChecktInputs() : %s value in < value out", GetHash().ToString().substr(0,10).c_str()));
|
|
|
|
// Tally transaction fees
|
|
int64 nTxFee = nValueIn - GetValueOut();
|
|
if (nTxFee < 0)
|
|
return DoS(100, error("CheckInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str()));
|
|
nFees += nTxFee;
|
|
if (!MoneyRange(nFees))
|
|
return DoS(100, error("CheckInputs() : nFees out of range"));
|
|
|
|
// The first loop above does all the inexpensive checks.
|
|
// Only if ALL inputs pass do we perform expensive ECDSA signature checks.
|
|
// Helps prevent CPU exhaustion attacks.
|
|
|
|
// Skip ECDSA signature verification when connecting blocks
|
|
// before the last block chain checkpoint. This is safe because block merkle hashes are
|
|
// still computed and checked, and any change will be caught at the next checkpoint.
|
|
if (csmode == CS_ALWAYS ||
|
|
(csmode == CS_AFTER_CHECKPOINT && inputs.GetBestBlock()->nHeight >= Checkpoints::GetTotalBlocksEstimate())) {
|
|
for (unsigned int i = 0; i < vin.size(); i++) {
|
|
const COutPoint &prevout = vin[i].prevout;
|
|
const CCoins &coins = inputs.GetCoins(prevout.hash);
|
|
|
|
// Verify signature
|
|
if (!VerifySignature(coins, *this, i, flags, 0))
|
|
return DoS(100,error("CheckInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
bool CTransaction::ClientCheckInputs() const
|
|
{
|
|
if (IsCoinBase())
|
|
return false;
|
|
|
|
// Take over previous transactions' spent pointers
|
|
{
|
|
LOCK(mempool.cs);
|
|
int64 nValueIn = 0;
|
|
for (unsigned int i = 0; i < vin.size(); i++)
|
|
{
|
|
// Get prev tx from single transactions in memory
|
|
COutPoint prevout = vin[i].prevout;
|
|
if (!mempool.exists(prevout.hash))
|
|
return false;
|
|
CTransaction& txPrev = mempool.lookup(prevout.hash);
|
|
|
|
if (prevout.n >= txPrev.vout.size())
|
|
return false;
|
|
|
|
// Verify signature
|
|
if (!VerifySignature(CCoins(txPrev, -1), *this, i, SCRIPT_VERIFY_P2SH, 0))
|
|
return error("ConnectInputs() : VerifySignature failed");
|
|
|
|
///// this is redundant with the mempool.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 (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
|
|
return error("ClientConnectInputs() : txin values out of range");
|
|
}
|
|
if (GetValueOut() > nValueIn)
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
|
|
bool CBlock::DisconnectBlock(CBlockIndex *pindex, CCoinsViewCache &view)
|
|
{
|
|
assert(pindex == view.GetBestBlock());
|
|
|
|
CBlockUndo blockUndo;
|
|
{
|
|
CDiskBlockPos pos = pindex->GetUndoPos();
|
|
if (pos.IsNull())
|
|
return error("DisconnectBlock() : no undo data available");
|
|
FILE *file = OpenUndoFile(pos, true);
|
|
if (file == NULL)
|
|
return error("DisconnectBlock() : undo file not available");
|
|
CAutoFile fileUndo(file, SER_DISK, CLIENT_VERSION);
|
|
fileUndo >> blockUndo;
|
|
}
|
|
|
|
assert(blockUndo.vtxundo.size() + 1 == vtx.size());
|
|
|
|
// undo transactions in reverse order
|
|
for (int i = vtx.size() - 1; i >= 0; i--) {
|
|
const CTransaction &tx = vtx[i];
|
|
uint256 hash = tx.GetHash();
|
|
|
|
// check that all outputs are available
|
|
if (!view.HaveCoins(hash))
|
|
return error("DisconnectBlock() : outputs still spent? database corrupted");
|
|
CCoins &outs = view.GetCoins(hash);
|
|
|
|
CCoins outsBlock = CCoins(tx, pindex->nHeight);
|
|
if (outs != outsBlock)
|
|
return error("DisconnectBlock() : added transaction mismatch? database corrupted");
|
|
|
|
// remove outputs
|
|
outs = CCoins();
|
|
|
|
// restore inputs
|
|
if (i > 0) { // not coinbases
|
|
const CTxUndo &txundo = blockUndo.vtxundo[i-1];
|
|
assert(txundo.vprevout.size() == tx.vin.size());
|
|
for (unsigned int j = tx.vin.size(); j-- > 0;) {
|
|
const COutPoint &out = tx.vin[j].prevout;
|
|
const CTxInUndo &undo = txundo.vprevout[j];
|
|
CCoins coins;
|
|
view.GetCoins(out.hash, coins); // this can fail if the prevout was already entirely spent
|
|
if (coins.IsPruned()) {
|
|
if (undo.nHeight == 0)
|
|
return error("DisconnectBlock() : undo data doesn't contain tx metadata? database corrupted");
|
|
coins.fCoinBase = undo.fCoinBase;
|
|
coins.nHeight = undo.nHeight;
|
|
coins.nVersion = undo.nVersion;
|
|
} else {
|
|
if (undo.nHeight != 0)
|
|
return error("DisconnectBlock() : undo data contains unneeded tx metadata? database corrupted");
|
|
}
|
|
if (coins.IsAvailable(out.n))
|
|
return error("DisconnectBlock() : prevout output not spent? database corrupted");
|
|
if (coins.vout.size() < out.n+1)
|
|
coins.vout.resize(out.n+1);
|
|
coins.vout[out.n] = undo.txout;
|
|
if (!view.SetCoins(out.hash, coins))
|
|
return error("DisconnectBlock() : cannot restore coin inputs");
|
|
}
|
|
}
|
|
}
|
|
|
|
// move best block pointer to prevout block
|
|
view.SetBestBlock(pindex->pprev);
|
|
|
|
return true;
|
|
}
|
|
|
|
void static FlushBlockFile()
|
|
{
|
|
LOCK(cs_LastBlockFile);
|
|
|
|
CDiskBlockPos posOld;
|
|
posOld.nFile = nLastBlockFile;
|
|
posOld.nPos = 0;
|
|
|
|
FILE *fileOld = OpenBlockFile(posOld);
|
|
FileCommit(fileOld);
|
|
fclose(fileOld);
|
|
|
|
fileOld = OpenUndoFile(posOld);
|
|
FileCommit(fileOld);
|
|
fclose(fileOld);
|
|
}
|
|
|
|
bool FindUndoPos(int nFile, CDiskBlockPos &pos, unsigned int nAddSize);
|
|
|
|
bool CBlock::ConnectBlock(CBlockIndex* pindex, CCoinsViewCache &view, bool fJustCheck)
|
|
{
|
|
// Check it again in case a previous version let a bad block in
|
|
if (!CheckBlock(!fJustCheck, !fJustCheck))
|
|
return false;
|
|
|
|
// verify that the view's current state corresponds to the previous block
|
|
assert(pindex->pprev == view.GetBestBlock());
|
|
|
|
// Do not allow blocks that contain transactions which 'overwrite' older transactions,
|
|
// unless those are already completely spent.
|
|
// If such overwrites are allowed, coinbases and transactions depending upon those
|
|
// can be duplicated to remove the ability to spend the first instance -- even after
|
|
// being sent to another address.
|
|
// See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
|
|
// This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
|
|
// already refuses previously-known transaction ids entirely.
|
|
// This rule was originally applied all blocks whose timestamp was after March 15, 2012, 0:00 UTC.
|
|
// Now that the whole chain is irreversibly beyond that time it is applied to all blocks except the
|
|
// two in the chain that violate it. This prevents exploiting the issue against nodes in their
|
|
// initial block download.
|
|
bool fEnforceBIP30 = (!pindex->phashBlock) || // Enforce on CreateNewBlock invocations which don't have a hash.
|
|
!((pindex->nHeight==91842 && pindex->GetBlockHash() == uint256("0x00000000000a4d0a398161ffc163c503763b1f4360639393e0e4c8e300e0caec")) ||
|
|
(pindex->nHeight==91880 && pindex->GetBlockHash() == uint256("0x00000000000743f190a18c5577a3c2d2a1f610ae9601ac046a38084ccb7cd721")));
|
|
if (fEnforceBIP30) {
|
|
for (unsigned int i=0; i<vtx.size(); i++) {
|
|
uint256 hash = GetTxHash(i);
|
|
if (view.HaveCoins(hash) && !view.GetCoins(hash).IsPruned())
|
|
return error("ConnectBlock() : tried to overwrite transaction");
|
|
}
|
|
}
|
|
|
|
// BIP16 didn't become active until Apr 1 2012
|
|
int64 nBIP16SwitchTime = 1333238400;
|
|
bool fStrictPayToScriptHash = (pindex->nTime >= nBIP16SwitchTime);
|
|
|
|
CBlockUndo blockundo;
|
|
|
|
int64 nFees = 0;
|
|
unsigned int nSigOps = 0;
|
|
for (unsigned int i=0; i<vtx.size(); i++)
|
|
{
|
|
const CTransaction &tx = vtx[i];
|
|
|
|
nSigOps += tx.GetLegacySigOpCount();
|
|
if (nSigOps > MAX_BLOCK_SIGOPS)
|
|
return DoS(100, error("ConnectBlock() : too many sigops"));
|
|
|
|
if (!tx.IsCoinBase())
|
|
{
|
|
if (!tx.HaveInputs(view))
|
|
return DoS(100, error("ConnectBlock() : inputs missing/spent"));
|
|
|
|
if (fStrictPayToScriptHash)
|
|
{
|
|
// Add in sigops done by pay-to-script-hash inputs;
|
|
// this is to prevent a "rogue miner" from creating
|
|
// an incredibly-expensive-to-validate block.
|
|
nSigOps += tx.GetP2SHSigOpCount(view);
|
|
if (nSigOps > MAX_BLOCK_SIGOPS)
|
|
return DoS(100, error("ConnectBlock() : too many sigops"));
|
|
}
|
|
|
|
nFees += tx.GetValueIn(view)-tx.GetValueOut();
|
|
|
|
if (!tx.CheckInputs(view, CS_AFTER_CHECKPOINT, fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE))
|
|
return false;
|
|
}
|
|
|
|
CTxUndo txundo;
|
|
if (!tx.UpdateCoins(view, txundo, pindex->nHeight, GetTxHash(i)))
|
|
return error("ConnectBlock() : UpdateInputs failed");
|
|
if (!tx.IsCoinBase())
|
|
blockundo.vtxundo.push_back(txundo);
|
|
}
|
|
|
|
if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
|
|
return error("ConnectBlock() : coinbase pays too much (actual=%lld vs limit=%lld)", (long long)vtx[0].GetValueOut(), (long long)GetBlockValue(pindex->nHeight, nFees));
|
|
|
|
if (fJustCheck)
|
|
return true;
|
|
|
|
// Write undo information to disk
|
|
if (pindex->GetUndoPos().IsNull() || (pindex->nStatus & BLOCK_VALID_MASK) < BLOCK_VALID_SCRIPTS)
|
|
{
|
|
if (pindex->GetUndoPos().IsNull()) {
|
|
CDiskBlockPos pos;
|
|
if (!FindUndoPos(pindex->nFile, pos, ::GetSerializeSize(blockundo, SER_DISK, CLIENT_VERSION) + 8))
|
|
return error("ConnectBlock() : FindUndoPos failed");
|
|
if (!blockundo.WriteToDisk(pos))
|
|
return error("ConnectBlock() : CBlockUndo::WriteToDisk failed");
|
|
|
|
// update nUndoPos in block index
|
|
pindex->nUndoPos = pos.nPos;
|
|
pindex->nStatus |= BLOCK_HAVE_UNDO;
|
|
}
|
|
|
|
pindex->nStatus = (pindex->nStatus & ~BLOCK_VALID_MASK) | BLOCK_VALID_SCRIPTS;
|
|
|
|
CDiskBlockIndex blockindex(pindex);
|
|
if (!pblocktree->WriteBlockIndex(blockindex))
|
|
return error("ConnectBlock() : WriteBlockIndex failed");
|
|
}
|
|
|
|
// add this block to the view's block chain
|
|
if (!view.SetBestBlock(pindex))
|
|
return false;
|
|
|
|
// Watch for transactions paying to me
|
|
for (unsigned int i=0; i<vtx.size(); i++)
|
|
SyncWithWallets(GetTxHash(i), vtx[i], this, true);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool SetBestChain(CBlockIndex* pindexNew)
|
|
{
|
|
CCoinsViewCache &view = *pcoinsTip;
|
|
|
|
// special case for attaching the genesis block
|
|
// note that no ConnectBlock is called, so its coinbase output is non-spendable
|
|
if (pindexGenesisBlock == NULL && pindexNew->GetBlockHash() == hashGenesisBlock)
|
|
{
|
|
view.SetBestBlock(pindexNew);
|
|
if (!view.Flush())
|
|
return false;
|
|
pindexGenesisBlock = pindexNew;
|
|
pindexBest = pindexNew;
|
|
hashBestChain = pindexNew->GetBlockHash();
|
|
nBestHeight = pindexBest->nHeight;
|
|
bnBestChainWork = pindexNew->bnChainWork;
|
|
return true;
|
|
}
|
|
|
|
// Find the fork (typically, there is none)
|
|
CBlockIndex* pfork = view.GetBestBlock();
|
|
CBlockIndex* plonger = pindexNew;
|
|
while (pfork != plonger)
|
|
{
|
|
while (plonger->nHeight > pfork->nHeight)
|
|
if (!(plonger = plonger->pprev))
|
|
return error("SetBestChain() : plonger->pprev is null");
|
|
if (pfork == plonger)
|
|
break;
|
|
if (!(pfork = pfork->pprev))
|
|
return error("SetBestChain() : pfork->pprev is null");
|
|
}
|
|
|
|
// List of what to disconnect (typically nothing)
|
|
vector<CBlockIndex*> vDisconnect;
|
|
for (CBlockIndex* pindex = view.GetBestBlock(); pindex != pfork; pindex = pindex->pprev)
|
|
vDisconnect.push_back(pindex);
|
|
|
|
// List of what to connect (typically only pindexNew)
|
|
vector<CBlockIndex*> vConnect;
|
|
for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
|
|
vConnect.push_back(pindex);
|
|
reverse(vConnect.begin(), vConnect.end());
|
|
|
|
if (vDisconnect.size() > 0) {
|
|
printf("REORGANIZE: Disconnect %"PRIszu" blocks; %s..%s\n", vDisconnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexBest->GetBlockHash().ToString().substr(0,20).c_str());
|
|
printf("REORGANIZE: Connect %"PRIszu" blocks; %s..%s\n", vConnect.size(), pfork->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->GetBlockHash().ToString().substr(0,20).c_str());
|
|
}
|
|
|
|
// Disconnect shorter branch
|
|
vector<CTransaction> vResurrect;
|
|
BOOST_FOREACH(CBlockIndex* pindex, vDisconnect) {
|
|
CBlock block;
|
|
if (!block.ReadFromDisk(pindex))
|
|
return error("SetBestBlock() : ReadFromDisk for disconnect failed");
|
|
CCoinsViewCache viewTemp(view, true);
|
|
if (!block.DisconnectBlock(pindex, viewTemp))
|
|
return error("SetBestBlock() : DisconnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
|
|
if (!viewTemp.Flush())
|
|
return error("SetBestBlock() : Cache flush failed after disconnect");
|
|
|
|
// Queue memory transactions to resurrect
|
|
BOOST_FOREACH(const CTransaction& tx, block.vtx)
|
|
if (!tx.IsCoinBase())
|
|
vResurrect.push_back(tx);
|
|
}
|
|
|
|
// Connect longer branch
|
|
vector<CTransaction> vDelete;
|
|
BOOST_FOREACH(CBlockIndex *pindex, vConnect) {
|
|
CBlock block;
|
|
if (!block.ReadFromDisk(pindex))
|
|
return error("SetBestBlock() : ReadFromDisk for connect failed");
|
|
CCoinsViewCache viewTemp(view, true);
|
|
if (!block.ConnectBlock(pindex, viewTemp)) {
|
|
InvalidChainFound(pindexNew);
|
|
InvalidBlockFound(pindex);
|
|
return error("SetBestBlock() : ConnectBlock %s failed", pindex->GetBlockHash().ToString().substr(0,20).c_str());
|
|
}
|
|
if (!viewTemp.Flush())
|
|
return error("SetBestBlock() : Cache flush failed after connect");
|
|
|
|
// Queue memory transactions to delete
|
|
BOOST_FOREACH(const CTransaction& tx, block.vtx)
|
|
vDelete.push_back(tx);
|
|
}
|
|
|
|
// Make sure it's successfully written to disk before changing memory structure
|
|
bool fIsInitialDownload = IsInitialBlockDownload();
|
|
if (!fIsInitialDownload || view.GetCacheSize() > nCoinCacheSize) {
|
|
FlushBlockFile();
|
|
pblocktree->Sync();
|
|
if (!view.Flush())
|
|
return false;
|
|
}
|
|
|
|
// At this point, all changes have been done to the database.
|
|
// Proceed by updating the memory structures.
|
|
|
|
// Disconnect shorter branch
|
|
BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
|
|
if (pindex->pprev)
|
|
pindex->pprev->pnext = NULL;
|
|
|
|
// Connect longer branch
|
|
BOOST_FOREACH(CBlockIndex* pindex, vConnect)
|
|
if (pindex->pprev)
|
|
pindex->pprev->pnext = pindex;
|
|
|
|
// Resurrect memory transactions that were in the disconnected branch
|
|
BOOST_FOREACH(CTransaction& tx, vResurrect)
|
|
tx.AcceptToMemoryPool(false);
|
|
|
|
// Delete redundant memory transactions that are in the connected branch
|
|
BOOST_FOREACH(CTransaction& tx, vDelete)
|
|
mempool.remove(tx);
|
|
|
|
// Update best block in wallet (so we can detect restored wallets)
|
|
if (!fIsInitialDownload)
|
|
{
|
|
const CBlockLocator locator(pindexNew);
|
|
::SetBestChain(locator);
|
|
}
|
|
|
|
// New best block
|
|
hashBestChain = pindexNew->GetBlockHash();
|
|
pindexBest = pindexNew;
|
|
pblockindexFBBHLast = NULL;
|
|
nBestHeight = pindexBest->nHeight;
|
|
bnBestChainWork = pindexNew->bnChainWork;
|
|
nTimeBestReceived = GetTime();
|
|
nTransactionsUpdated++;
|
|
printf("SetBestChain: new best=%s height=%d work=%s tx=%lu date=%s\n",
|
|
hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str(), (unsigned long)pindexNew->nChainTx,
|
|
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
|
|
|
|
// Check the version of the last 100 blocks to see if we need to upgrade:
|
|
if (!fIsInitialDownload)
|
|
{
|
|
int nUpgraded = 0;
|
|
const CBlockIndex* pindex = pindexBest;
|
|
for (int i = 0; i < 100 && pindex != NULL; i++)
|
|
{
|
|
if (pindex->nVersion > CBlock::CURRENT_VERSION)
|
|
++nUpgraded;
|
|
pindex = pindex->pprev;
|
|
}
|
|
if (nUpgraded > 0)
|
|
printf("SetBestChain: %d of last 100 blocks above version %d\n", nUpgraded, CBlock::CURRENT_VERSION);
|
|
if (nUpgraded > 100/2)
|
|
// strMiscWarning is read by GetWarnings(), called by Qt and the JSON-RPC code to warn the user:
|
|
strMiscWarning = _("Warning: This version is obsolete, upgrade required!");
|
|
}
|
|
|
|
std::string strCmd = GetArg("-blocknotify", "");
|
|
|
|
if (!fIsInitialDownload && !strCmd.empty())
|
|
{
|
|
boost::replace_all(strCmd, "%s", hashBestChain.GetHex());
|
|
boost::thread t(runCommand, strCmd); // thread runs free
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
bool CBlock::AddToBlockIndex(const CDiskBlockPos &pos)
|
|
{
|
|
// Check for duplicate
|
|
uint256 hash = GetHash();
|
|
if (mapBlockIndex.count(hash))
|
|
return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
|
|
|
|
// Construct new block index object
|
|
CBlockIndex* pindexNew = new CBlockIndex(*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;
|
|
}
|
|
pindexNew->nTx = vtx.size();
|
|
pindexNew->bnChainWork = (pindexNew->pprev ? pindexNew->pprev->bnChainWork : 0) + pindexNew->GetBlockWork();
|
|
pindexNew->nChainTx = (pindexNew->pprev ? pindexNew->pprev->nChainTx : 0) + pindexNew->nTx;
|
|
pindexNew->nFile = pos.nFile;
|
|
pindexNew->nDataPos = pos.nPos;
|
|
pindexNew->nUndoPos = 0;
|
|
pindexNew->nStatus = BLOCK_VALID_TRANSACTIONS | BLOCK_HAVE_DATA;
|
|
setBlockIndexValid.insert(pindexNew);
|
|
|
|
pblocktree->WriteBlockIndex(CDiskBlockIndex(pindexNew));
|
|
|
|
// New best?
|
|
if (!ConnectBestBlock())
|
|
return false;
|
|
|
|
if (pindexNew == pindexBest)
|
|
{
|
|
// Notify UI to display prev block's coinbase if it was ours
|
|
static uint256 hashPrevBestCoinBase;
|
|
UpdatedTransaction(hashPrevBestCoinBase);
|
|
hashPrevBestCoinBase = GetTxHash(0);
|
|
}
|
|
|
|
pblocktree->Flush();
|
|
|
|
uiInterface.NotifyBlocksChanged();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool FindBlockPos(CDiskBlockPos &pos, unsigned int nAddSize, unsigned int nHeight, uint64 nTime, bool fKnown = false)
|
|
{
|
|
bool fUpdatedLast = false;
|
|
|
|
LOCK(cs_LastBlockFile);
|
|
|
|
if (fKnown) {
|
|
if (nLastBlockFile != pos.nFile) {
|
|
nLastBlockFile = pos.nFile;
|
|
infoLastBlockFile.SetNull();
|
|
pblocktree->ReadBlockFileInfo(nLastBlockFile, infoLastBlockFile);
|
|
}
|
|
} else {
|
|
while (infoLastBlockFile.nSize + nAddSize >= MAX_BLOCKFILE_SIZE) {
|
|
printf("Leaving block file %i: %s\n", nLastBlockFile, infoLastBlockFile.ToString().c_str());
|
|
FlushBlockFile();
|
|
nLastBlockFile++;
|
|
infoLastBlockFile.SetNull();
|
|
pblocktree->ReadBlockFileInfo(nLastBlockFile, infoLastBlockFile); // check whether data for the new file somehow already exist; can fail just fine
|
|
fUpdatedLast = true;
|
|
}
|
|
pos.nFile = nLastBlockFile;
|
|
pos.nPos = infoLastBlockFile.nSize;
|
|
}
|
|
|
|
infoLastBlockFile.nSize += nAddSize;
|
|
infoLastBlockFile.AddBlock(nHeight, nTime);
|
|
|
|
if (!fKnown) {
|
|
unsigned int nOldChunks = (pos.nPos + BLOCKFILE_CHUNK_SIZE - 1) / BLOCKFILE_CHUNK_SIZE;
|
|
unsigned int nNewChunks = (infoLastBlockFile.nSize + BLOCKFILE_CHUNK_SIZE - 1) / BLOCKFILE_CHUNK_SIZE;
|
|
if (nNewChunks > nOldChunks) {
|
|
FILE *file = OpenBlockFile(pos);
|
|
if (file) {
|
|
printf("Pre-allocating up to position 0x%x in blk%05u.dat\n", nNewChunks * BLOCKFILE_CHUNK_SIZE, pos.nFile);
|
|
AllocateFileRange(file, pos.nPos, nNewChunks * BLOCKFILE_CHUNK_SIZE - pos.nPos);
|
|
fclose(file);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!pblocktree->WriteBlockFileInfo(nLastBlockFile, infoLastBlockFile))
|
|
return error("FindBlockPos() : cannot write updated block info");
|
|
if (fUpdatedLast)
|
|
pblocktree->WriteLastBlockFile(nLastBlockFile);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool FindUndoPos(int nFile, CDiskBlockPos &pos, unsigned int nAddSize)
|
|
{
|
|
pos.nFile = nFile;
|
|
|
|
LOCK(cs_LastBlockFile);
|
|
|
|
unsigned int nNewSize;
|
|
if (nFile == nLastBlockFile) {
|
|
pos.nPos = infoLastBlockFile.nUndoSize;
|
|
nNewSize = (infoLastBlockFile.nUndoSize += nAddSize);
|
|
if (!pblocktree->WriteBlockFileInfo(nLastBlockFile, infoLastBlockFile))
|
|
return error("FindUndoPos() : cannot write updated block info");
|
|
} else {
|
|
CBlockFileInfo info;
|
|
if (!pblocktree->ReadBlockFileInfo(nFile, info))
|
|
return error("FindUndoPos() : cannot read block info");
|
|
pos.nPos = info.nUndoSize;
|
|
nNewSize = (info.nUndoSize += nAddSize);
|
|
if (!pblocktree->WriteBlockFileInfo(nFile, info))
|
|
return error("FindUndoPos() : cannot write updated block info");
|
|
}
|
|
|
|
unsigned int nOldChunks = (pos.nPos + UNDOFILE_CHUNK_SIZE - 1) / UNDOFILE_CHUNK_SIZE;
|
|
unsigned int nNewChunks = (nNewSize + UNDOFILE_CHUNK_SIZE - 1) / UNDOFILE_CHUNK_SIZE;
|
|
if (nNewChunks > nOldChunks) {
|
|
FILE *file = OpenUndoFile(pos);
|
|
if (file) {
|
|
printf("Pre-allocating up to position 0x%x in rev%05u.dat\n", nNewChunks * UNDOFILE_CHUNK_SIZE, pos.nFile);
|
|
AllocateFileRange(file, pos.nPos, nNewChunks * UNDOFILE_CHUNK_SIZE - pos.nPos);
|
|
fclose(file);
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
bool CBlock::CheckBlock(bool fCheckPOW, bool fCheckMerkleRoot) 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_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK, PROTOCOL_VERSION) > MAX_BLOCK_SIZE)
|
|
return DoS(100, error("CheckBlock() : size limits failed"));
|
|
|
|
// Check proof of work matches claimed amount
|
|
if (fCheckPOW && !CheckProofOfWork(GetHash(), nBits))
|
|
return DoS(50, error("CheckBlock() : proof of work failed"));
|
|
|
|
// Check timestamp
|
|
if (GetBlockTime() > 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 DoS(100, error("CheckBlock() : first tx is not coinbase"));
|
|
for (unsigned int i = 1; i < vtx.size(); i++)
|
|
if (vtx[i].IsCoinBase())
|
|
return DoS(100, error("CheckBlock() : more than one coinbase"));
|
|
|
|
// Check transactions
|
|
BOOST_FOREACH(const CTransaction& tx, vtx)
|
|
if (!tx.CheckTransaction())
|
|
return DoS(tx.nDoS, error("CheckBlock() : CheckTransaction failed"));
|
|
|
|
// Build the merkle tree already. We need it anyway later, and it makes the
|
|
// block cache the transaction hashes, which means they don't need to be
|
|
// recalculated many times during this block's validation.
|
|
BuildMerkleTree();
|
|
|
|
// Check for duplicate txids. This is caught by ConnectInputs(),
|
|
// but catching it earlier avoids a potential DoS attack:
|
|
set<uint256> uniqueTx;
|
|
for (unsigned int i=0; i<vtx.size(); i++) {
|
|
uniqueTx.insert(GetTxHash(i));
|
|
}
|
|
if (uniqueTx.size() != vtx.size())
|
|
return DoS(100, error("CheckBlock() : duplicate transaction"));
|
|
|
|
unsigned int nSigOps = 0;
|
|
BOOST_FOREACH(const CTransaction& tx, vtx)
|
|
{
|
|
nSigOps += tx.GetLegacySigOpCount();
|
|
}
|
|
if (nSigOps > MAX_BLOCK_SIGOPS)
|
|
return DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"));
|
|
|
|
// Check merkle root
|
|
if (fCheckMerkleRoot && hashMerkleRoot != BuildMerkleTree())
|
|
return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CBlock::AcceptBlock(CDiskBlockPos *dbp)
|
|
{
|
|
// Check for duplicate
|
|
uint256 hash = GetHash();
|
|
if (mapBlockIndex.count(hash))
|
|
return error("AcceptBlock() : block already in mapBlockIndex");
|
|
|
|
// Get prev block index
|
|
CBlockIndex* pindexPrev = NULL;
|
|
int nHeight = 0;
|
|
if (hash != hashGenesisBlock) {
|
|
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
|
|
if (mi == mapBlockIndex.end())
|
|
return DoS(10, error("AcceptBlock() : prev block not found"));
|
|
pindexPrev = (*mi).second;
|
|
nHeight = pindexPrev->nHeight+1;
|
|
|
|
// Check proof of work
|
|
if (nBits != GetNextWorkRequired(pindexPrev, this))
|
|
return DoS(100, error("AcceptBlock() : incorrect proof of work"));
|
|
|
|
// Check timestamp against prev
|
|
if (GetBlockTime() <= pindexPrev->GetMedianTimePast())
|
|
return error("AcceptBlock() : block's timestamp is too early");
|
|
|
|
// Check that all transactions are finalized
|
|
BOOST_FOREACH(const CTransaction& tx, vtx)
|
|
if (!tx.IsFinal(nHeight, GetBlockTime()))
|
|
return DoS(10, error("AcceptBlock() : contains a non-final transaction"));
|
|
|
|
// Check that the block chain matches the known block chain up to a checkpoint
|
|
if (!Checkpoints::CheckBlock(nHeight, hash))
|
|
return DoS(100, error("AcceptBlock() : rejected by checkpoint lock-in at %d", nHeight));
|
|
|
|
// Reject block.nVersion=1 blocks when 95% (75% on testnet) of the network has upgraded:
|
|
if (nVersion < 2)
|
|
{
|
|
if ((!fTestNet && CBlockIndex::IsSuperMajority(2, pindexPrev, 950, 1000)) ||
|
|
(fTestNet && CBlockIndex::IsSuperMajority(2, pindexPrev, 75, 100)))
|
|
{
|
|
return error("AcceptBlock() : rejected nVersion=1 block");
|
|
}
|
|
}
|
|
// Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
|
|
if (nVersion >= 2)
|
|
{
|
|
// if 750 of the last 1,000 blocks are version 2 or greater (51/100 if testnet):
|
|
if ((!fTestNet && CBlockIndex::IsSuperMajority(2, pindexPrev, 750, 1000)) ||
|
|
(fTestNet && CBlockIndex::IsSuperMajority(2, pindexPrev, 51, 100)))
|
|
{
|
|
CScript expect = CScript() << nHeight;
|
|
if (!std::equal(expect.begin(), expect.end(), vtx[0].vin[0].scriptSig.begin()))
|
|
return DoS(100, error("AcceptBlock() : block height mismatch in coinbase"));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Write block to history file
|
|
unsigned int nBlockSize = ::GetSerializeSize(*this, SER_DISK, CLIENT_VERSION);
|
|
CDiskBlockPos blockPos;
|
|
if (dbp == NULL) {
|
|
if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK, CLIENT_VERSION)))
|
|
return error("AcceptBlock() : out of disk space");
|
|
} else {
|
|
blockPos = *dbp;
|
|
}
|
|
if (!FindBlockPos(blockPos, nBlockSize+8, nHeight, nTime, dbp != NULL))
|
|
return error("AcceptBlock() : FindBlockPos failed");
|
|
if (dbp == NULL)
|
|
if (!WriteToDisk(blockPos))
|
|
return error("AcceptBlock() : WriteToDisk failed");
|
|
if (!AddToBlockIndex(blockPos))
|
|
return error("AcceptBlock() : AddToBlockIndex failed");
|
|
|
|
// Relay inventory, but don't relay old inventory during initial block download
|
|
int nBlockEstimate = Checkpoints::GetTotalBlocksEstimate();
|
|
if (hashBestChain == hash)
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate))
|
|
pnode->PushInventory(CInv(MSG_BLOCK, hash));
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired, unsigned int nToCheck)
|
|
{
|
|
unsigned int nFound = 0;
|
|
for (unsigned int i = 0; i < nToCheck && nFound < nRequired && pstart != NULL; i++)
|
|
{
|
|
if (pstart->nVersion >= minVersion)
|
|
++nFound;
|
|
pstart = pstart->pprev;
|
|
}
|
|
return (nFound >= nRequired);
|
|
}
|
|
|
|
bool ProcessBlock(CNode* pfrom, CBlock* pblock, CDiskBlockPos *dbp)
|
|
{
|
|
// 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(0,20).c_str());
|
|
if (mapOrphanBlocks.count(hash))
|
|
return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,20).c_str());
|
|
|
|
// Preliminary checks
|
|
if (!pblock->CheckBlock())
|
|
return error("ProcessBlock() : CheckBlock FAILED");
|
|
|
|
CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
|
|
if (pcheckpoint && pblock->hashPrevBlock != hashBestChain)
|
|
{
|
|
// Extra checks to prevent "fill up memory by spamming with bogus blocks"
|
|
int64 deltaTime = pblock->GetBlockTime() - pcheckpoint->nTime;
|
|
if (deltaTime < 0)
|
|
{
|
|
if (pfrom)
|
|
pfrom->Misbehaving(100);
|
|
return error("ProcessBlock() : block with timestamp before last checkpoint");
|
|
}
|
|
CBigNum bnNewBlock;
|
|
bnNewBlock.SetCompact(pblock->nBits);
|
|
CBigNum bnRequired;
|
|
bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime));
|
|
if (bnNewBlock > bnRequired)
|
|
{
|
|
if (pfrom)
|
|
pfrom->Misbehaving(100);
|
|
return error("ProcessBlock() : block with too little proof-of-work");
|
|
}
|
|
}
|
|
|
|
|
|
// If we don't already have its previous block, shunt it off to holding area until we get it
|
|
if (pblock->hashPrevBlock != 0 && !mapBlockIndex.count(pblock->hashPrevBlock))
|
|
{
|
|
printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
|
|
|
|
// Accept orphans as long as there is a node to request its parents from
|
|
if (pfrom) {
|
|
CBlock* pblock2 = new CBlock(*pblock);
|
|
mapOrphanBlocks.insert(make_pair(hash, pblock2));
|
|
mapOrphanBlocksByPrev.insert(make_pair(pblock2->hashPrevBlock, pblock2));
|
|
|
|
// Ask this guy to fill in what we're missing
|
|
pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(pblock2));
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Store to disk
|
|
if (!pblock->AcceptBlock(dbp))
|
|
return error("ProcessBlock() : AcceptBlock FAILED");
|
|
|
|
// Recursively process any orphan blocks that depended on this one
|
|
vector<uint256> vWorkQueue;
|
|
vWorkQueue.push_back(hash);
|
|
for (unsigned 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;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
bool CheckDiskSpace(uint64 nAdditionalBytes)
|
|
{
|
|
uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
|
|
|
|
// Check for nMinDiskSpace bytes (currently 50MB)
|
|
if (nFreeBytesAvailable < nMinDiskSpace + nAdditionalBytes)
|
|
{
|
|
fShutdown = true;
|
|
string strMessage = _("Warning: Disk space is low!");
|
|
strMiscWarning = strMessage;
|
|
printf("*** %s\n", strMessage.c_str());
|
|
uiInterface.ThreadSafeMessageBox(strMessage, "Bitcoin", CClientUIInterface::OK | CClientUIInterface::ICON_EXCLAMATION | CClientUIInterface::MODAL);
|
|
StartShutdown();
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
CCriticalSection cs_LastBlockFile;
|
|
CBlockFileInfo infoLastBlockFile;
|
|
int nLastBlockFile = 0;
|
|
|
|
FILE* OpenDiskFile(const CDiskBlockPos &pos, const char *prefix, bool fReadOnly)
|
|
{
|
|
if (pos.IsNull())
|
|
return NULL;
|
|
boost::filesystem::path path = GetDataDir() / "blocks" / strprintf("%s%05u.dat", prefix, pos.nFile);
|
|
boost::filesystem::create_directories(path.parent_path());
|
|
FILE* file = fopen(path.string().c_str(), "rb+");
|
|
if (!file && !fReadOnly)
|
|
file = fopen(path.string().c_str(), "wb+");
|
|
if (!file) {
|
|
printf("Unable to open file %s\n", path.string().c_str());
|
|
return NULL;
|
|
}
|
|
if (pos.nPos) {
|
|
if (fseek(file, pos.nPos, SEEK_SET)) {
|
|
printf("Unable to seek to position %u of %s\n", pos.nPos, path.string().c_str());
|
|
fclose(file);
|
|
return NULL;
|
|
}
|
|
}
|
|
return file;
|
|
}
|
|
|
|
FILE* OpenBlockFile(const CDiskBlockPos &pos, bool fReadOnly) {
|
|
return OpenDiskFile(pos, "blk", fReadOnly);
|
|
}
|
|
|
|
FILE *OpenUndoFile(const CDiskBlockPos &pos, bool fReadOnly) {
|
|
return OpenDiskFile(pos, "rev", fReadOnly);
|
|
}
|
|
|
|
CBlockIndex * InsertBlockIndex(uint256 hash)
|
|
{
|
|
if (hash == 0)
|
|
return NULL;
|
|
|
|
// Return existing
|
|
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
|
|
if (mi != mapBlockIndex.end())
|
|
return (*mi).second;
|
|
|
|
// Create new
|
|
CBlockIndex* pindexNew = new CBlockIndex();
|
|
if (!pindexNew)
|
|
throw runtime_error("LoadBlockIndex() : new CBlockIndex failed");
|
|
mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
|
|
pindexNew->phashBlock = &((*mi).first);
|
|
|
|
return pindexNew;
|
|
}
|
|
|
|
bool static LoadBlockIndexDB()
|
|
{
|
|
if (!pblocktree->LoadBlockIndexGuts())
|
|
return false;
|
|
|
|
if (fRequestShutdown)
|
|
return true;
|
|
|
|
// Calculate bnChainWork
|
|
vector<pair<int, CBlockIndex*> > vSortedByHeight;
|
|
vSortedByHeight.reserve(mapBlockIndex.size());
|
|
BOOST_FOREACH(const PAIRTYPE(uint256, CBlockIndex*)& item, mapBlockIndex)
|
|
{
|
|
CBlockIndex* pindex = item.second;
|
|
vSortedByHeight.push_back(make_pair(pindex->nHeight, pindex));
|
|
}
|
|
sort(vSortedByHeight.begin(), vSortedByHeight.end());
|
|
BOOST_FOREACH(const PAIRTYPE(int, CBlockIndex*)& item, vSortedByHeight)
|
|
{
|
|
CBlockIndex* pindex = item.second;
|
|
pindex->bnChainWork = (pindex->pprev ? pindex->pprev->bnChainWork : 0) + pindex->GetBlockWork();
|
|
pindex->nChainTx = (pindex->pprev ? pindex->pprev->nChainTx : 0) + pindex->nTx;
|
|
if ((pindex->nStatus & BLOCK_VALID_MASK) >= BLOCK_VALID_TRANSACTIONS && !(pindex->nStatus & BLOCK_FAILED_MASK))
|
|
setBlockIndexValid.insert(pindex);
|
|
}
|
|
|
|
// Load block file info
|
|
pblocktree->ReadLastBlockFile(nLastBlockFile);
|
|
printf("LoadBlockIndex(): last block file = %i\n", nLastBlockFile);
|
|
if (pblocktree->ReadBlockFileInfo(nLastBlockFile, infoLastBlockFile))
|
|
printf("LoadBlockIndex(): last block file: %s\n", infoLastBlockFile.ToString().c_str());
|
|
|
|
// Load hashBestChain pointer to end of best chain
|
|
pindexBest = pcoinsTip->GetBestBlock();
|
|
if (pindexBest == NULL)
|
|
{
|
|
if (pindexGenesisBlock == NULL)
|
|
return true;
|
|
}
|
|
hashBestChain = pindexBest->GetBlockHash();
|
|
nBestHeight = pindexBest->nHeight;
|
|
bnBestChainWork = pindexBest->bnChainWork;
|
|
|
|
// set 'next' pointers in best chain
|
|
CBlockIndex *pindex = pindexBest;
|
|
while(pindex != NULL && pindex->pprev != NULL) {
|
|
CBlockIndex *pindexPrev = pindex->pprev;
|
|
pindexPrev->pnext = pindex;
|
|
pindex = pindexPrev;
|
|
}
|
|
printf("LoadBlockIndex(): hashBestChain=%s height=%d date=%s\n",
|
|
hashBestChain.ToString().substr(0,20).c_str(), nBestHeight,
|
|
DateTimeStrFormat("%x %H:%M:%S", pindexBest->GetBlockTime()).c_str());
|
|
|
|
// Load bnBestInvalidWork, OK if it doesn't exist
|
|
pblocktree->ReadBestInvalidWork(bnBestInvalidWork);
|
|
|
|
// Check whether we need to continue reindexing
|
|
bool fReindexing = false;
|
|
pblocktree->ReadReindexing(fReindexing);
|
|
fReindex |= fReindexing;
|
|
|
|
// Verify blocks in the best chain
|
|
int nCheckLevel = GetArg("-checklevel", 1);
|
|
int nCheckDepth = GetArg( "-checkblocks", 2500);
|
|
if (nCheckDepth == 0)
|
|
nCheckDepth = 1000000000; // suffices until the year 19000
|
|
if (nCheckDepth > nBestHeight)
|
|
nCheckDepth = nBestHeight;
|
|
printf("Verifying last %i blocks at level %i\n", nCheckDepth, nCheckLevel);
|
|
CBlockIndex* pindexFork = NULL;
|
|
for (CBlockIndex* pindex = pindexBest; pindex && pindex->pprev; pindex = pindex->pprev)
|
|
{
|
|
if (fRequestShutdown || pindex->nHeight < nBestHeight-nCheckDepth)
|
|
break;
|
|
CBlock block;
|
|
if (!block.ReadFromDisk(pindex))
|
|
return error("LoadBlockIndex() : block.ReadFromDisk failed");
|
|
// check level 1: verify block validity
|
|
if (nCheckLevel>0 && !block.CheckBlock())
|
|
{
|
|
printf("LoadBlockIndex() : *** found bad block at %d, hash=%s\n", pindex->nHeight, pindex->GetBlockHash().ToString().c_str());
|
|
pindexFork = pindex->pprev;
|
|
}
|
|
// TODO: stronger verifications
|
|
}
|
|
if (pindexFork && !fRequestShutdown)
|
|
{
|
|
// TODO: reorg back
|
|
return error("LoadBlockIndex(): chain database corrupted");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool LoadBlockIndex()
|
|
{
|
|
if (fTestNet)
|
|
{
|
|
pchMessageStart[0] = 0x0b;
|
|
pchMessageStart[1] = 0x11;
|
|
pchMessageStart[2] = 0x09;
|
|
pchMessageStart[3] = 0x07;
|
|
hashGenesisBlock = uint256("000000000933ea01ad0ee984209779baaec3ced90fa3f408719526f8d77f4943");
|
|
}
|
|
|
|
if (fReindex)
|
|
return true;
|
|
|
|
//
|
|
// Load block index from databases
|
|
//
|
|
if (!LoadBlockIndexDB())
|
|
return false;
|
|
|
|
//
|
|
// Init with genesis block
|
|
//
|
|
if (mapBlockIndex.empty())
|
|
{
|
|
// Genesis Block:
|
|
// 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() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << 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;
|
|
|
|
if (fTestNet)
|
|
{
|
|
block.nTime = 1296688602;
|
|
block.nNonce = 414098458;
|
|
}
|
|
|
|
//// debug print
|
|
uint256 hash = block.GetHash();
|
|
printf("%s\n", hash.ToString().c_str());
|
|
printf("%s\n", hashGenesisBlock.ToString().c_str());
|
|
printf("%s\n", block.hashMerkleRoot.ToString().c_str());
|
|
assert(block.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
|
|
block.print();
|
|
assert(hash == hashGenesisBlock);
|
|
|
|
// Start new block file
|
|
unsigned int nBlockSize = ::GetSerializeSize(block, SER_DISK, CLIENT_VERSION);
|
|
CDiskBlockPos blockPos;
|
|
if (!FindBlockPos(blockPos, nBlockSize+8, 0, block.nTime))
|
|
return error("AcceptBlock() : FindBlockPos failed");
|
|
if (!block.WriteToDisk(blockPos))
|
|
return error("LoadBlockIndex() : writing genesis block to disk failed");
|
|
if (!block.AddToBlockIndex(blockPos))
|
|
return error("LoadBlockIndex() : genesis block not accepted");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
void PrintBlockTree()
|
|
{
|
|
// pre-compute 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 (blk%05u.dat:0x%x) %s tx %"PRIszu"",
|
|
pindex->nHeight,
|
|
pindex->GetBlockPos().nFile, pindex->GetBlockPos().nPos,
|
|
DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
|
|
block.vtx.size());
|
|
|
|
PrintWallets(block);
|
|
|
|
// put the main time-chain first
|
|
vector<CBlockIndex*>& vNext = mapNext[pindex];
|
|
for (unsigned int i = 0; i < vNext.size(); i++)
|
|
{
|
|
if (vNext[i]->pnext)
|
|
{
|
|
swap(vNext[0], vNext[i]);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// iterate children
|
|
for (unsigned int i = 0; i < vNext.size(); i++)
|
|
vStack.push_back(make_pair(nCol+i, vNext[i]));
|
|
}
|
|
}
|
|
|
|
bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
|
|
{
|
|
int64 nStart = GetTimeMillis();
|
|
|
|
int nLoaded = 0;
|
|
{
|
|
CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE, MAX_BLOCK_SIZE+8, SER_DISK, CLIENT_VERSION);
|
|
uint64 nStartByte = 0;
|
|
if (dbp) {
|
|
// (try to) skip already indexed part
|
|
CBlockFileInfo info;
|
|
if (pblocktree->ReadBlockFileInfo(dbp->nFile, info)) {
|
|
nStartByte = info.nSize;
|
|
blkdat.Seek(info.nSize);
|
|
}
|
|
}
|
|
uint64 nRewind = blkdat.GetPos();
|
|
while (blkdat.good() && !blkdat.eof() && !fShutdown) {
|
|
blkdat.SetPos(nRewind);
|
|
nRewind++; // start one byte further next time, in case of failure
|
|
blkdat.SetLimit(); // remove former limit
|
|
unsigned int nSize = 0;
|
|
try {
|
|
// locate a header
|
|
unsigned char buf[4];
|
|
blkdat.FindByte(pchMessageStart[0]);
|
|
nRewind = blkdat.GetPos()+1;
|
|
blkdat >> FLATDATA(buf);
|
|
if (memcmp(buf, pchMessageStart, 4))
|
|
continue;
|
|
// read size
|
|
blkdat >> nSize;
|
|
if (nSize < 80 || nSize > MAX_BLOCK_SIZE)
|
|
continue;
|
|
} catch (std::exception &e) {
|
|
// no valid block header found; don't complain
|
|
break;
|
|
}
|
|
try {
|
|
// read block
|
|
uint64 nBlockPos = blkdat.GetPos();
|
|
blkdat.SetLimit(nBlockPos + nSize);
|
|
CBlock block;
|
|
blkdat >> block;
|
|
nRewind = blkdat.GetPos();
|
|
|
|
// process block
|
|
if (nBlockPos >= nStartByte) {
|
|
LOCK(cs_main);
|
|
if (dbp)
|
|
dbp->nPos = nBlockPos;
|
|
if (ProcessBlock(NULL, &block, dbp))
|
|
nLoaded++;
|
|
}
|
|
} catch (std::exception &e) {
|
|
printf("%s() : Deserialize or I/O error caught during load\n", __PRETTY_FUNCTION__);
|
|
}
|
|
}
|
|
fclose(fileIn);
|
|
}
|
|
if (nLoaded > 0)
|
|
printf("Loaded %i blocks from external file in %"PRI64d"ms\n", nLoaded, GetTimeMillis() - nStart);
|
|
return nLoaded > 0;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// CAlert
|
|
//
|
|
|
|
extern map<uint256, CAlert> mapAlerts;
|
|
extern CCriticalSection cs_mapAlerts;
|
|
|
|
string GetWarnings(string strFor)
|
|
{
|
|
int nPriority = 0;
|
|
string strStatusBar;
|
|
string strRPC;
|
|
|
|
if (GetBoolArg("-testsafemode"))
|
|
strRPC = "test";
|
|
|
|
if (!CLIENT_VERSION_IS_RELEASE)
|
|
strStatusBar = _("This is a pre-release test build - use at your own risk - do not use for mining or merchant applications");
|
|
|
|
// Misc warnings like out of disk space and clock is wrong
|
|
if (strMiscWarning != "")
|
|
{
|
|
nPriority = 1000;
|
|
strStatusBar = strMiscWarning;
|
|
}
|
|
|
|
// Longer invalid proof-of-work chain
|
|
if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
|
|
{
|
|
nPriority = 2000;
|
|
strStatusBar = strRPC = _("Warning: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.");
|
|
}
|
|
|
|
// Alerts
|
|
{
|
|
LOCK(cs_mapAlerts);
|
|
BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
|
|
{
|
|
const CAlert& alert = item.second;
|
|
if (alert.AppliesToMe() && alert.nPriority > nPriority)
|
|
{
|
|
nPriority = alert.nPriority;
|
|
strStatusBar = alert.strStatusBar;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (strFor == "statusbar")
|
|
return strStatusBar;
|
|
else if (strFor == "rpc")
|
|
return strRPC;
|
|
assert(!"GetWarnings() : invalid parameter");
|
|
return "error";
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Messages
|
|
//
|
|
|
|
|
|
bool static AlreadyHave(const CInv& inv)
|
|
{
|
|
switch (inv.type)
|
|
{
|
|
case MSG_TX:
|
|
{
|
|
bool txInMap = false;
|
|
{
|
|
LOCK(mempool.cs);
|
|
txInMap = mempool.exists(inv.hash);
|
|
}
|
|
return txInMap || mapOrphanTransactions.count(inv.hash) ||
|
|
pcoinsTip->HaveCoins(inv.hash);
|
|
}
|
|
case MSG_BLOCK:
|
|
return mapBlockIndex.count(inv.hash) ||
|
|
mapOrphanBlocks.count(inv.hash);
|
|
}
|
|
// Don't know what it is, just say we already got one
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
|
|
// The message start string is designed to be unlikely to occur in normal data.
|
|
// The characters are rarely used upper ASCII, not valid as UTF-8, and produce
|
|
// a large 4-byte int at any alignment.
|
|
unsigned char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
|
|
|
|
|
|
bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
|
|
{
|
|
RandAddSeedPerfmon();
|
|
if (fDebug)
|
|
printf("received: %s (%"PRIszu" 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)
|
|
{
|
|
pfrom->Misbehaving(1);
|
|
return false;
|
|
}
|
|
|
|
int64 nTime;
|
|
CAddress addrMe;
|
|
CAddress addrFrom;
|
|
uint64 nNonce = 1;
|
|
vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
|
|
if (pfrom->nVersion < MIN_PROTO_VERSION)
|
|
{
|
|
// Since February 20, 2012, the protocol is initiated at version 209,
|
|
// and earlier versions are no longer supported
|
|
printf("partner %s using obsolete version %i; disconnecting\n", pfrom->addr.ToString().c_str(), pfrom->nVersion);
|
|
pfrom->fDisconnect = true;
|
|
return false;
|
|
}
|
|
|
|
if (pfrom->nVersion == 10300)
|
|
pfrom->nVersion = 300;
|
|
if (!vRecv.empty())
|
|
vRecv >> addrFrom >> nNonce;
|
|
if (!vRecv.empty())
|
|
vRecv >> pfrom->strSubVer;
|
|
if (!vRecv.empty())
|
|
vRecv >> pfrom->nStartingHeight;
|
|
|
|
if (pfrom->fInbound && addrMe.IsRoutable())
|
|
{
|
|
pfrom->addrLocal = addrMe;
|
|
SeenLocal(addrMe);
|
|
}
|
|
|
|
// Disconnect if we connected to ourself
|
|
if (nNonce == nLocalHostNonce && nNonce > 1)
|
|
{
|
|
printf("connected to self at %s, disconnecting\n", pfrom->addr.ToString().c_str());
|
|
pfrom->fDisconnect = true;
|
|
return true;
|
|
}
|
|
|
|
// Be shy and don't send version until we hear
|
|
if (pfrom->fInbound)
|
|
pfrom->PushVersion();
|
|
|
|
pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
|
|
|
|
AddTimeData(pfrom->addr, nTime);
|
|
|
|
// Change version
|
|
pfrom->PushMessage("verack");
|
|
pfrom->vSend.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
|
|
|
|
if (!pfrom->fInbound)
|
|
{
|
|
// Advertise our address
|
|
if (!fNoListen && !IsInitialBlockDownload())
|
|
{
|
|
CAddress addr = GetLocalAddress(&pfrom->addr);
|
|
if (addr.IsRoutable())
|
|
pfrom->PushAddress(addr);
|
|
}
|
|
|
|
// Get recent addresses
|
|
if (pfrom->fOneShot || pfrom->nVersion >= CADDR_TIME_VERSION || addrman.size() < 1000)
|
|
{
|
|
pfrom->PushMessage("getaddr");
|
|
pfrom->fGetAddr = true;
|
|
}
|
|
addrman.Good(pfrom->addr);
|
|
} else {
|
|
if (((CNetAddr)pfrom->addr) == (CNetAddr)addrFrom)
|
|
{
|
|
addrman.Add(addrFrom, addrFrom);
|
|
addrman.Good(addrFrom);
|
|
}
|
|
}
|
|
|
|
// Ask the first connected node for block updates
|
|
static int nAskedForBlocks = 0;
|
|
if (!pfrom->fClient && !pfrom->fOneShot && !fImporting && !fReindex &&
|
|
(pfrom->nStartingHeight > (nBestHeight - 144)) &&
|
|
(pfrom->nVersion < NOBLKS_VERSION_START ||
|
|
pfrom->nVersion >= NOBLKS_VERSION_END) &&
|
|
(nAskedForBlocks < 1 || vNodes.size() <= 1))
|
|
{
|
|
nAskedForBlocks++;
|
|
pfrom->PushGetBlocks(pindexBest, uint256(0));
|
|
}
|
|
|
|
// Relay alerts
|
|
{
|
|
LOCK(cs_mapAlerts);
|
|
BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
|
|
item.second.RelayTo(pfrom);
|
|
}
|
|
|
|
pfrom->fSuccessfullyConnected = true;
|
|
|
|
printf("receive version message: version %d, blocks=%d, us=%s, them=%s, peer=%s\n", pfrom->nVersion, pfrom->nStartingHeight, addrMe.ToString().c_str(), addrFrom.ToString().c_str(), pfrom->addr.ToString().c_str());
|
|
|
|
cPeerBlockCounts.input(pfrom->nStartingHeight);
|
|
}
|
|
|
|
|
|
else if (pfrom->nVersion == 0)
|
|
{
|
|
// Must have a version message before anything else
|
|
pfrom->Misbehaving(1);
|
|
return false;
|
|
}
|
|
|
|
|
|
else if (strCommand == "verack")
|
|
{
|
|
pfrom->vRecv.SetVersion(min(pfrom->nVersion, PROTOCOL_VERSION));
|
|
}
|
|
|
|
|
|
else if (strCommand == "addr")
|
|
{
|
|
vector<CAddress> vAddr;
|
|
vRecv >> vAddr;
|
|
|
|
// Don't want addr from older versions unless seeding
|
|
if (pfrom->nVersion < CADDR_TIME_VERSION && addrman.size() > 1000)
|
|
return true;
|
|
if (vAddr.size() > 1000)
|
|
{
|
|
pfrom->Misbehaving(20);
|
|
return error("message addr size() = %"PRIszu"", vAddr.size());
|
|
}
|
|
|
|
// Store the new addresses
|
|
vector<CAddress> vAddrOk;
|
|
int64 nNow = GetAdjustedTime();
|
|
int64 nSince = nNow - 10 * 60;
|
|
BOOST_FOREACH(CAddress& addr, vAddr)
|
|
{
|
|
if (fShutdown)
|
|
return true;
|
|
if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
|
|
addr.nTime = nNow - 5 * 24 * 60 * 60;
|
|
pfrom->AddAddressKnown(addr);
|
|
bool fReachable = IsReachable(addr);
|
|
if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
|
|
{
|
|
// Relay to a limited number of other nodes
|
|
{
|
|
LOCK(cs_vNodes);
|
|
// Use deterministic randomness to send to the same nodes for 24 hours
|
|
// at a time so the setAddrKnowns of the chosen nodes prevent repeats
|
|
static uint256 hashSalt;
|
|
if (hashSalt == 0)
|
|
hashSalt = GetRandHash();
|
|
uint64 hashAddr = addr.GetHash();
|
|
uint256 hashRand = hashSalt ^ (hashAddr<<32) ^ ((GetTime()+hashAddr)/(24*60*60));
|
|
hashRand = Hash(BEGIN(hashRand), END(hashRand));
|
|
multimap<uint256, CNode*> mapMix;
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
if (pnode->nVersion < CADDR_TIME_VERSION)
|
|
continue;
|
|
unsigned int nPointer;
|
|
memcpy(&nPointer, &pnode, sizeof(nPointer));
|
|
uint256 hashKey = hashRand ^ nPointer;
|
|
hashKey = Hash(BEGIN(hashKey), END(hashKey));
|
|
mapMix.insert(make_pair(hashKey, pnode));
|
|
}
|
|
int nRelayNodes = fReachable ? 2 : 1; // limited relaying of addresses outside our network(s)
|
|
for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
|
|
((*mi).second)->PushAddress(addr);
|
|
}
|
|
}
|
|
// Do not store addresses outside our network
|
|
if (fReachable)
|
|
vAddrOk.push_back(addr);
|
|
}
|
|
addrman.Add(vAddrOk, pfrom->addr, 2 * 60 * 60);
|
|
if (vAddr.size() < 1000)
|
|
pfrom->fGetAddr = false;
|
|
if (pfrom->fOneShot)
|
|
pfrom->fDisconnect = true;
|
|
}
|
|
|
|
|
|
else if (strCommand == "inv")
|
|
{
|
|
vector<CInv> vInv;
|
|
vRecv >> vInv;
|
|
if (vInv.size() > MAX_INV_SZ)
|
|
{
|
|
pfrom->Misbehaving(20);
|
|
return error("message inv size() = %"PRIszu"", vInv.size());
|
|
}
|
|
|
|
// find last block in inv vector
|
|
unsigned int nLastBlock = (unsigned int)(-1);
|
|
for (unsigned int nInv = 0; nInv < vInv.size(); nInv++) {
|
|
if (vInv[vInv.size() - 1 - nInv].type == MSG_BLOCK) {
|
|
nLastBlock = vInv.size() - 1 - nInv;
|
|
break;
|
|
}
|
|
}
|
|
for (unsigned int nInv = 0; nInv < vInv.size(); nInv++)
|
|
{
|
|
const CInv &inv = vInv[nInv];
|
|
|
|
if (fShutdown)
|
|
return true;
|
|
pfrom->AddInventoryKnown(inv);
|
|
|
|
bool fAlreadyHave = AlreadyHave(inv);
|
|
if (fDebug)
|
|
printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
|
|
|
|
if (!fAlreadyHave) {
|
|
if (!fImporting && !fReindex)
|
|
pfrom->AskFor(inv);
|
|
} else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash)) {
|
|
pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
|
|
} else if (nInv == nLastBlock) {
|
|
// In case we are on a very long side-chain, it is possible that we already have
|
|
// the last block in an inv bundle sent in response to getblocks. Try to detect
|
|
// this situation and push another getblocks to continue.
|
|
pfrom->PushGetBlocks(mapBlockIndex[inv.hash], uint256(0));
|
|
if (fDebug)
|
|
printf("force request: %s\n", inv.ToString().c_str());
|
|
}
|
|
|
|
// Track requests for our stuff
|
|
Inventory(inv.hash);
|
|
}
|
|
}
|
|
|
|
|
|
else if (strCommand == "getdata")
|
|
{
|
|
vector<CInv> vInv;
|
|
vRecv >> vInv;
|
|
if (vInv.size() > MAX_INV_SZ)
|
|
{
|
|
pfrom->Misbehaving(20);
|
|
return error("message getdata size() = %"PRIszu"", vInv.size());
|
|
}
|
|
|
|
if (fDebugNet || (vInv.size() != 1))
|
|
printf("received getdata (%"PRIszu" invsz)\n", vInv.size());
|
|
|
|
BOOST_FOREACH(const CInv& inv, vInv)
|
|
{
|
|
if (fShutdown)
|
|
return true;
|
|
if (fDebugNet || (vInv.size() == 1))
|
|
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())
|
|
{
|
|
CBlock block;
|
|
block.ReadFromDisk((*mi).second);
|
|
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
|
|
bool pushed = false;
|
|
{
|
|
LOCK(cs_mapRelay);
|
|
map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
|
|
if (mi != mapRelay.end()) {
|
|
pfrom->PushMessage(inv.GetCommand(), (*mi).second);
|
|
pushed = true;
|
|
}
|
|
}
|
|
if (!pushed && inv.type == MSG_TX) {
|
|
LOCK(mempool.cs);
|
|
if (mempool.exists(inv.hash)) {
|
|
CTransaction tx = mempool.lookup(inv.hash);
|
|
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
|
|
ss.reserve(1000);
|
|
ss << tx;
|
|
pfrom->PushMessage("tx", ss);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Track requests for our stuff
|
|
Inventory(inv.hash);
|
|
}
|
|
}
|
|
|
|
|
|
else if (strCommand == "getblocks")
|
|
{
|
|
CBlockLocator locator;
|
|
uint256 hashStop;
|
|
vRecv >> locator >> hashStop;
|
|
|
|
// Find the last 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;
|
|
printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).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(0,20).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(0,20).c_str());
|
|
pfrom->hashContinue = pindex->GetBlockHash();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
else if (strCommand == "getheaders")
|
|
{
|
|
CBlockLocator locator;
|
|
uint256 hashStop;
|
|
vRecv >> locator >> hashStop;
|
|
|
|
CBlockIndex* pindex = NULL;
|
|
if (locator.IsNull())
|
|
{
|
|
// If locator is null, return the hashStop block
|
|
map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashStop);
|
|
if (mi == mapBlockIndex.end())
|
|
return true;
|
|
pindex = (*mi).second;
|
|
}
|
|
else
|
|
{
|
|
// Find the last block the caller has in the main chain
|
|
pindex = locator.GetBlockIndex();
|
|
if (pindex)
|
|
pindex = pindex->pnext;
|
|
}
|
|
|
|
vector<CBlock> vHeaders;
|
|
int nLimit = 2000;
|
|
printf("getheaders %d to %s\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str());
|
|
for (; pindex; pindex = pindex->pnext)
|
|
{
|
|
vHeaders.push_back(pindex->GetBlockHeader());
|
|
if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
|
|
break;
|
|
}
|
|
pfrom->PushMessage("headers", vHeaders);
|
|
}
|
|
|
|
|
|
else if (strCommand == "tx")
|
|
{
|
|
vector<uint256> vWorkQueue;
|
|
vector<uint256> vEraseQueue;
|
|
CDataStream vMsg(vRecv);
|
|
CTransaction tx;
|
|
vRecv >> tx;
|
|
|
|
CInv inv(MSG_TX, tx.GetHash());
|
|
pfrom->AddInventoryKnown(inv);
|
|
|
|
bool fMissingInputs = false;
|
|
if (tx.AcceptToMemoryPool(true, &fMissingInputs))
|
|
{
|
|
SyncWithWallets(inv.hash, tx, NULL, true);
|
|
RelayMessage(inv, vMsg);
|
|
mapAlreadyAskedFor.erase(inv);
|
|
vWorkQueue.push_back(inv.hash);
|
|
vEraseQueue.push_back(inv.hash);
|
|
|
|
// Recursively process any orphan transactions that depended on this one
|
|
for (unsigned int i = 0; i < vWorkQueue.size(); i++)
|
|
{
|
|
uint256 hashPrev = vWorkQueue[i];
|
|
for (map<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev[hashPrev].begin();
|
|
mi != mapOrphanTransactionsByPrev[hashPrev].end();
|
|
++mi)
|
|
{
|
|
const CDataStream& vMsg = *((*mi).second);
|
|
CTransaction tx;
|
|
CDataStream(vMsg) >> tx;
|
|
CInv inv(MSG_TX, tx.GetHash());
|
|
bool fMissingInputs2 = false;
|
|
|
|
if (tx.AcceptToMemoryPool(true, &fMissingInputs2))
|
|
{
|
|
printf(" accepted orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
|
|
SyncWithWallets(inv.hash, tx, NULL, true);
|
|
RelayMessage(inv, vMsg);
|
|
mapAlreadyAskedFor.erase(inv);
|
|
vWorkQueue.push_back(inv.hash);
|
|
vEraseQueue.push_back(inv.hash);
|
|
}
|
|
else if (!fMissingInputs2)
|
|
{
|
|
// invalid orphan
|
|
vEraseQueue.push_back(inv.hash);
|
|
printf(" removed invalid orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
|
|
}
|
|
}
|
|
}
|
|
|
|
BOOST_FOREACH(uint256 hash, vEraseQueue)
|
|
EraseOrphanTx(hash);
|
|
}
|
|
else if (fMissingInputs)
|
|
{
|
|
AddOrphanTx(vMsg);
|
|
|
|
// DoS prevention: do not allow mapOrphanTransactions to grow unbounded
|
|
unsigned int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
|
|
if (nEvicted > 0)
|
|
printf("mapOrphan overflow, removed %u tx\n", nEvicted);
|
|
}
|
|
if (tx.nDoS) pfrom->Misbehaving(tx.nDoS);
|
|
}
|
|
|
|
|
|
else if (strCommand == "block" && !fImporting && !fReindex) // Ignore blocks received while importing
|
|
{
|
|
CBlock block;
|
|
vRecv >> block;
|
|
|
|
printf("received block %s\n", block.GetHash().ToString().substr(0,20).c_str());
|
|
// block.print();
|
|
|
|
CInv inv(MSG_BLOCK, block.GetHash());
|
|
pfrom->AddInventoryKnown(inv);
|
|
|
|
if (ProcessBlock(pfrom, &block))
|
|
mapAlreadyAskedFor.erase(inv);
|
|
if (block.nDoS) pfrom->Misbehaving(block.nDoS);
|
|
}
|
|
|
|
|
|
else if (strCommand == "getaddr")
|
|
{
|
|
pfrom->vAddrToSend.clear();
|
|
vector<CAddress> vAddr = addrman.GetAddr();
|
|
BOOST_FOREACH(const CAddress &addr, vAddr)
|
|
pfrom->PushAddress(addr);
|
|
}
|
|
|
|
|
|
else if (strCommand == "mempool")
|
|
{
|
|
std::vector<uint256> vtxid;
|
|
mempool.queryHashes(vtxid);
|
|
vector<CInv> vInv;
|
|
for (unsigned int i = 0; i < vtxid.size(); i++) {
|
|
CInv inv(MSG_TX, vtxid[i]);
|
|
vInv.push_back(inv);
|
|
if (i == (MAX_INV_SZ - 1))
|
|
break;
|
|
}
|
|
if (vInv.size() > 0)
|
|
pfrom->PushMessage("inv", vInv);
|
|
}
|
|
|
|
|
|
else if (strCommand == "ping")
|
|
{
|
|
if (pfrom->nVersion > BIP0031_VERSION)
|
|
{
|
|
uint64 nonce = 0;
|
|
vRecv >> nonce;
|
|
// Echo the message back with the nonce. This allows for two useful features:
|
|
//
|
|
// 1) A remote node can quickly check if the connection is operational
|
|
// 2) Remote nodes can measure the latency of the network thread. If this node
|
|
// is overloaded it won't respond to pings quickly and the remote node can
|
|
// avoid sending us more work, like chain download requests.
|
|
//
|
|
// The nonce stops the remote getting confused between different pings: without
|
|
// it, if the remote node sends a ping once per second and this node takes 5
|
|
// seconds to respond to each, the 5th ping the remote sends would appear to
|
|
// return very quickly.
|
|
pfrom->PushMessage("pong", nonce);
|
|
}
|
|
}
|
|
|
|
|
|
else if (strCommand == "alert")
|
|
{
|
|
CAlert alert;
|
|
vRecv >> alert;
|
|
|
|
uint256 alertHash = alert.GetHash();
|
|
if (pfrom->setKnown.count(alertHash) == 0)
|
|
{
|
|
if (alert.ProcessAlert())
|
|
{
|
|
// Relay
|
|
pfrom->setKnown.insert(alertHash);
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
alert.RelayTo(pnode);
|
|
}
|
|
}
|
|
else {
|
|
// Small DoS penalty so peers that send us lots of
|
|
// duplicate/expired/invalid-signature/whatever alerts
|
|
// eventually get banned.
|
|
// This isn't a Misbehaving(100) (immediate ban) because the
|
|
// peer might be an older or different implementation with
|
|
// a different signature key, etc.
|
|
pfrom->Misbehaving(10);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
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 ProcessMessages(CNode* pfrom)
|
|
{
|
|
CDataStream& vRecv = pfrom->vRecv;
|
|
if (vRecv.empty())
|
|
return true;
|
|
//if (fDebug)
|
|
// printf("ProcessMessages(%u bytes)\n", vRecv.size());
|
|
|
|
//
|
|
// Message format
|
|
// (4) message start
|
|
// (12) command
|
|
// (4) size
|
|
// (4) checksum
|
|
// (x) data
|
|
//
|
|
|
|
loop
|
|
{
|
|
// Don't bother if send buffer is too full to respond anyway
|
|
if (pfrom->vSend.size() >= SendBufferSize())
|
|
break;
|
|
|
|
// Scan for message start
|
|
CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
|
|
int nHeaderSize = vRecv.GetSerializeSize(CMessageHeader());
|
|
if (vRecv.end() - pstart < nHeaderSize)
|
|
{
|
|
if ((int)vRecv.size() > nHeaderSize)
|
|
{
|
|
printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
|
|
vRecv.erase(vRecv.begin(), vRecv.end() - nHeaderSize);
|
|
}
|
|
break;
|
|
}
|
|
if (pstart - vRecv.begin() > 0)
|
|
printf("\n\nPROCESSMESSAGE SKIPPED %"PRIpdd" BYTES\n\n", pstart - vRecv.begin());
|
|
vRecv.erase(vRecv.begin(), pstart);
|
|
|
|
// Read header
|
|
vector<char> vHeaderSave(vRecv.begin(), vRecv.begin() + nHeaderSize);
|
|
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 > MAX_SIZE)
|
|
{
|
|
printf("ProcessMessages(%s, %u bytes) : nMessageSize > MAX_SIZE\n", strCommand.c_str(), nMessageSize);
|
|
continue;
|
|
}
|
|
if (nMessageSize > vRecv.size())
|
|
{
|
|
// Rewind and wait for rest of message
|
|
vRecv.insert(vRecv.begin(), vHeaderSave.begin(), vHeaderSave.end());
|
|
break;
|
|
}
|
|
|
|
// Checksum
|
|
uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
|
|
unsigned int nChecksum = 0;
|
|
memcpy(&nChecksum, &hash, sizeof(nChecksum));
|
|
if (nChecksum != hdr.nChecksum)
|
|
{
|
|
printf("ProcessMessages(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
|
|
strCommand.c_str(), nMessageSize, nChecksum, hdr.nChecksum);
|
|
continue;
|
|
}
|
|
|
|
// 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
|
|
{
|
|
{
|
|
LOCK(cs_main);
|
|
fRet = ProcessMessage(pfrom, strCommand, vMsg);
|
|
}
|
|
if (fShutdown)
|
|
return true;
|
|
}
|
|
catch (std::ios_base::failure& e)
|
|
{
|
|
if (strstr(e.what(), "end of data"))
|
|
{
|
|
// Allow exceptions from under-length message on vRecv
|
|
printf("ProcessMessages(%s, %u 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 over-long size
|
|
printf("ProcessMessages(%s, %u bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
|
|
}
|
|
else
|
|
{
|
|
PrintExceptionContinue(&e, "ProcessMessages()");
|
|
}
|
|
}
|
|
catch (std::exception& e) {
|
|
PrintExceptionContinue(&e, "ProcessMessages()");
|
|
} catch (...) {
|
|
PrintExceptionContinue(NULL, "ProcessMessages()");
|
|
}
|
|
|
|
if (!fRet)
|
|
printf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand.c_str(), nMessageSize);
|
|
}
|
|
|
|
vRecv.Compact();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool SendMessages(CNode* pto, bool fSendTrickle)
|
|
{
|
|
TRY_LOCK(cs_main, lockMain);
|
|
if (lockMain) {
|
|
// Don't send anything until we get their version message
|
|
if (pto->nVersion == 0)
|
|
return true;
|
|
|
|
// Keep-alive ping. We send a nonce of zero because we don't use it anywhere
|
|
// right now.
|
|
if (pto->nLastSend && GetTime() - pto->nLastSend > 30 * 60 && pto->vSend.empty()) {
|
|
uint64 nonce = 0;
|
|
if (pto->nVersion > BIP0031_VERSION)
|
|
pto->PushMessage("ping", nonce);
|
|
else
|
|
pto->PushMessage("ping");
|
|
}
|
|
|
|
// Resend wallet transactions that haven't gotten in a block yet
|
|
ResendWalletTransactions();
|
|
|
|
// Address refresh broadcast
|
|
static int64 nLastRebroadcast;
|
|
if (!IsInitialBlockDownload() && (GetTime() - nLastRebroadcast > 24 * 60 * 60))
|
|
{
|
|
{
|
|
LOCK(cs_vNodes);
|
|
BOOST_FOREACH(CNode* pnode, vNodes)
|
|
{
|
|
// Periodically clear setAddrKnown to allow refresh broadcasts
|
|
if (nLastRebroadcast)
|
|
pnode->setAddrKnown.clear();
|
|
|
|
// Rebroadcast our address
|
|
if (!fNoListen)
|
|
{
|
|
CAddress addr = GetLocalAddress(&pnode->addr);
|
|
if (addr.IsRoutable())
|
|
pnode->PushAddress(addr);
|
|
}
|
|
}
|
|
}
|
|
nLastRebroadcast = GetTime();
|
|
}
|
|
|
|
//
|
|
// Message: addr
|
|
//
|
|
if (fSendTrickle)
|
|
{
|
|
vector<CAddress> vAddr;
|
|
vAddr.reserve(pto->vAddrToSend.size());
|
|
BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
|
|
{
|
|
// returns true if wasn't already contained in the set
|
|
if (pto->setAddrKnown.insert(addr).second)
|
|
{
|
|
vAddr.push_back(addr);
|
|
// receiver rejects addr messages larger than 1000
|
|
if (vAddr.size() >= 1000)
|
|
{
|
|
pto->PushMessage("addr", vAddr);
|
|
vAddr.clear();
|
|
}
|
|
}
|
|
}
|
|
pto->vAddrToSend.clear();
|
|
if (!vAddr.empty())
|
|
pto->PushMessage("addr", vAddr);
|
|
}
|
|
|
|
|
|
//
|
|
// Message: inventory
|
|
//
|
|
vector<CInv> vInv;
|
|
vector<CInv> vInvWait;
|
|
{
|
|
LOCK(pto->cs_inventory);
|
|
vInv.reserve(pto->vInventoryToSend.size());
|
|
vInvWait.reserve(pto->vInventoryToSend.size());
|
|
BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
|
|
{
|
|
if (pto->setInventoryKnown.count(inv))
|
|
continue;
|
|
|
|
// trickle out tx inv to protect privacy
|
|
if (inv.type == MSG_TX && !fSendTrickle)
|
|
{
|
|
// 1/4 of tx invs blast to all immediately
|
|
static uint256 hashSalt;
|
|
if (hashSalt == 0)
|
|
hashSalt = GetRandHash();
|
|
uint256 hashRand = inv.hash ^ hashSalt;
|
|
hashRand = Hash(BEGIN(hashRand), END(hashRand));
|
|
bool fTrickleWait = ((hashRand & 3) != 0);
|
|
|
|
// always trickle our own transactions
|
|
if (!fTrickleWait)
|
|
{
|
|
CWalletTx wtx;
|
|
if (GetTransaction(inv.hash, wtx))
|
|
if (wtx.fFromMe)
|
|
fTrickleWait = true;
|
|
}
|
|
|
|
if (fTrickleWait)
|
|
{
|
|
vInvWait.push_back(inv);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// returns true if wasn't already contained in the set
|
|
if (pto->setInventoryKnown.insert(inv).second)
|
|
{
|
|
vInv.push_back(inv);
|
|
if (vInv.size() >= 1000)
|
|
{
|
|
pto->PushMessage("inv", vInv);
|
|
vInv.clear();
|
|
}
|
|
}
|
|
}
|
|
pto->vInventoryToSend = vInvWait;
|
|
}
|
|
if (!vInv.empty())
|
|
pto->PushMessage("inv", vInv);
|
|
|
|
|
|
//
|
|
// Message: getdata
|
|
//
|
|
vector<CInv> vGetData;
|
|
int64 nNow = GetTime() * 1000000;
|
|
while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
|
|
{
|
|
const CInv& inv = (*pto->mapAskFor.begin()).second;
|
|
if (!AlreadyHave(inv))
|
|
{
|
|
if (fDebugNet)
|
|
printf("sending getdata: %s\n", inv.ToString().c_str());
|
|
vGetData.push_back(inv);
|
|
if (vGetData.size() >= 1000)
|
|
{
|
|
pto->PushMessage("getdata", vGetData);
|
|
vGetData.clear();
|
|
}
|
|
mapAlreadyAskedFor[inv] = nNow;
|
|
}
|
|
pto->mapAskFor.erase(pto->mapAskFor.begin());
|
|
}
|
|
if (!vGetData.empty())
|
|
pto->PushMessage("getdata", vGetData);
|
|
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// BitcoinMiner
|
|
//
|
|
|
|
int static 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;
|
|
}
|
|
|
|
static const unsigned int pSHA256InitState[8] =
|
|
{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
|
|
|
|
void SHA256Transform(void* pstate, void* pinput, const void* pinit)
|
|
{
|
|
SHA256_CTX ctx;
|
|
unsigned char data[64];
|
|
|
|
SHA256_Init(&ctx);
|
|
|
|
for (int i = 0; i < 16; i++)
|
|
((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]);
|
|
|
|
for (int i = 0; i < 8; i++)
|
|
ctx.h[i] = ((uint32_t*)pinit)[i];
|
|
|
|
SHA256_Update(&ctx, data, sizeof(data));
|
|
for (int i = 0; i < 8; i++)
|
|
((uint32_t*)pstate)[i] = ctx.h[i];
|
|
}
|
|
|
|
//
|
|
// ScanHash scans nonces looking for a hash with at least some zero bits.
|
|
// It operates on big endian data. Caller does the byte reversing.
|
|
// All input buffers are 16-byte aligned. nNonce is usually preserved
|
|
// between calls, but periodically or if nNonce is 0xffff0000 or above,
|
|
// the block is rebuilt and nNonce starts over at zero.
|
|
//
|
|
unsigned int static ScanHash_CryptoPP(char* pmidstate, char* pdata, char* phash1, char* phash, unsigned int& nHashesDone)
|
|
{
|
|
unsigned int& nNonce = *(unsigned int*)(pdata + 12);
|
|
for (;;)
|
|
{
|
|
// Crypto++ SHA256
|
|
// Hash pdata using pmidstate as the starting state into
|
|
// pre-formatted buffer phash1, then hash phash1 into phash
|
|
nNonce++;
|
|
SHA256Transform(phash1, pdata, pmidstate);
|
|
SHA256Transform(phash, phash1, pSHA256InitState);
|
|
|
|
// Return the nonce if the hash has at least some zero bits,
|
|
// caller will check if it has enough to reach the target
|
|
if (((unsigned short*)phash)[14] == 0)
|
|
return nNonce;
|
|
|
|
// If nothing found after trying for a while, return -1
|
|
if ((nNonce & 0xffff) == 0)
|
|
{
|
|
nHashesDone = 0xffff+1;
|
|
return (unsigned int) -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Some explaining would be appreciated
|
|
class COrphan
|
|
{
|
|
public:
|
|
CTransaction* ptx;
|
|
set<uint256> setDependsOn;
|
|
double dPriority;
|
|
double dFeePerKb;
|
|
|
|
COrphan(CTransaction* ptxIn)
|
|
{
|
|
ptx = ptxIn;
|
|
dPriority = dFeePerKb = 0;
|
|
}
|
|
|
|
void print() const
|
|
{
|
|
printf("COrphan(hash=%s, dPriority=%.1f, dFeePerKb=%.1f)\n",
|
|
ptx->GetHash().ToString().substr(0,10).c_str(), dPriority, dFeePerKb);
|
|
BOOST_FOREACH(uint256 hash, setDependsOn)
|
|
printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
|
|
}
|
|
};
|
|
|
|
|
|
uint64 nLastBlockTx = 0;
|
|
uint64 nLastBlockSize = 0;
|
|
|
|
// We want to sort transactions by priority and fee, so:
|
|
typedef boost::tuple<double, double, CTransaction*> TxPriority;
|
|
class TxPriorityCompare
|
|
{
|
|
bool byFee;
|
|
public:
|
|
TxPriorityCompare(bool _byFee) : byFee(_byFee) { }
|
|
bool operator()(const TxPriority& a, const TxPriority& b)
|
|
{
|
|
if (byFee)
|
|
{
|
|
if (a.get<1>() == b.get<1>())
|
|
return a.get<0>() < b.get<0>();
|
|
return a.get<1>() < b.get<1>();
|
|
}
|
|
else
|
|
{
|
|
if (a.get<0>() == b.get<0>())
|
|
return a.get<1>() < b.get<1>();
|
|
return a.get<0>() < b.get<0>();
|
|
}
|
|
}
|
|
};
|
|
|
|
CBlock* CreateNewBlock(CReserveKey& reservekey)
|
|
{
|
|
|
|
// Create new block
|
|
auto_ptr<CBlock> pblock(new CBlock());
|
|
if (!pblock.get())
|
|
return NULL;
|
|
|
|
// Create coinbase tx
|
|
CTransaction txNew;
|
|
txNew.vin.resize(1);
|
|
txNew.vin[0].prevout.SetNull();
|
|
txNew.vout.resize(1);
|
|
txNew.vout[0].scriptPubKey << reservekey.GetReservedKey() << OP_CHECKSIG;
|
|
|
|
// Add our coinbase tx as first transaction
|
|
pblock->vtx.push_back(txNew);
|
|
|
|
// Largest block you're willing to create:
|
|
unsigned int nBlockMaxSize = GetArg("-blockmaxsize", MAX_BLOCK_SIZE_GEN/2);
|
|
// Limit to betweeen 1K and MAX_BLOCK_SIZE-1K for sanity:
|
|
nBlockMaxSize = std::max((unsigned int)1000, std::min((unsigned int)(MAX_BLOCK_SIZE-1000), nBlockMaxSize));
|
|
|
|
// How much of the block should be dedicated to high-priority transactions,
|
|
// included regardless of the fees they pay
|
|
unsigned int nBlockPrioritySize = GetArg("-blockprioritysize", 27000);
|
|
nBlockPrioritySize = std::min(nBlockMaxSize, nBlockPrioritySize);
|
|
|
|
// Minimum block size you want to create; block will be filled with free transactions
|
|
// until there are no more or the block reaches this size:
|
|
unsigned int nBlockMinSize = GetArg("-blockminsize", 0);
|
|
nBlockMinSize = std::min(nBlockMaxSize, nBlockMinSize);
|
|
|
|
// Fee-per-kilobyte amount considered the same as "free"
|
|
// Be careful setting this: if you set it to zero then
|
|
// a transaction spammer can cheaply fill blocks using
|
|
// 1-satoshi-fee transactions. It should be set above the real
|
|
// cost to you of processing a transaction.
|
|
int64 nMinTxFee = MIN_TX_FEE;
|
|
if (mapArgs.count("-mintxfee"))
|
|
ParseMoney(mapArgs["-mintxfee"], nMinTxFee);
|
|
|
|
// Collect memory pool transactions into the block
|
|
int64 nFees = 0;
|
|
{
|
|
LOCK2(cs_main, mempool.cs);
|
|
CBlockIndex* pindexPrev = pindexBest;
|
|
CCoinsViewCache view(*pcoinsTip, true);
|
|
|
|
// Priority order to process transactions
|
|
list<COrphan> vOrphan; // list memory doesn't move
|
|
map<uint256, vector<COrphan*> > mapDependers;
|
|
|
|
// This vector will be sorted into a priority queue:
|
|
vector<TxPriority> vecPriority;
|
|
vecPriority.reserve(mempool.mapTx.size());
|
|
for (map<uint256, CTransaction>::iterator mi = mempool.mapTx.begin(); mi != mempool.mapTx.end(); ++mi)
|
|
{
|
|
CTransaction& tx = (*mi).second;
|
|
if (tx.IsCoinBase() || !tx.IsFinal())
|
|
continue;
|
|
|
|
COrphan* porphan = NULL;
|
|
double dPriority = 0;
|
|
int64 nTotalIn = 0;
|
|
bool fMissingInputs = false;
|
|
BOOST_FOREACH(const CTxIn& txin, tx.vin)
|
|
{
|
|
// Read prev transaction
|
|
CCoins coins;
|
|
if (!view.GetCoins(txin.prevout.hash, coins))
|
|
{
|
|
// This should never happen; all transactions in the memory
|
|
// pool should connect to either transactions in the chain
|
|
// or other transactions in the memory pool.
|
|
if (!mempool.mapTx.count(txin.prevout.hash))
|
|
{
|
|
printf("ERROR: mempool transaction missing input\n");
|
|
if (fDebug) assert("mempool transaction missing input" == 0);
|
|
fMissingInputs = true;
|
|
if (porphan)
|
|
vOrphan.pop_back();
|
|
break;
|
|
}
|
|
|
|
// Has to wait for dependencies
|
|
if (!porphan)
|
|
{
|
|
// Use list for automatic deletion
|
|
vOrphan.push_back(COrphan(&tx));
|
|
porphan = &vOrphan.back();
|
|
}
|
|
mapDependers[txin.prevout.hash].push_back(porphan);
|
|
porphan->setDependsOn.insert(txin.prevout.hash);
|
|
nTotalIn += mempool.mapTx[txin.prevout.hash].vout[txin.prevout.n].nValue;
|
|
continue;
|
|
}
|
|
|
|
int64 nValueIn = coins.vout[txin.prevout.n].nValue;
|
|
nTotalIn += nValueIn;
|
|
|
|
int nConf = pindexPrev->nHeight - coins.nHeight + 1;
|
|
|
|
dPriority += (double)nValueIn * nConf;
|
|
}
|
|
if (fMissingInputs) continue;
|
|
|
|
// Priority is sum(valuein * age) / txsize
|
|
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
|
|
dPriority /= nTxSize;
|
|
|
|
// This is a more accurate fee-per-kilobyte than is used by the client code, because the
|
|
// client code rounds up the size to the nearest 1K. That's good, because it gives an
|
|
// incentive to create smaller transactions.
|
|
double dFeePerKb = double(nTotalIn-tx.GetValueOut()) / (double(nTxSize)/1000.0);
|
|
|
|
if (porphan)
|
|
{
|
|
porphan->dPriority = dPriority;
|
|
porphan->dFeePerKb = dFeePerKb;
|
|
}
|
|
else
|
|
vecPriority.push_back(TxPriority(dPriority, dFeePerKb, &(*mi).second));
|
|
}
|
|
|
|
// Collect transactions into block
|
|
uint64 nBlockSize = 1000;
|
|
uint64 nBlockTx = 0;
|
|
int nBlockSigOps = 100;
|
|
bool fSortedByFee = (nBlockPrioritySize <= 0);
|
|
|
|
TxPriorityCompare comparer(fSortedByFee);
|
|
std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
|
|
while (!vecPriority.empty())
|
|
{
|
|
// Take highest priority transaction off the priority queue:
|
|
double dPriority = vecPriority.front().get<0>();
|
|
double dFeePerKb = vecPriority.front().get<1>();
|
|
CTransaction& tx = *(vecPriority.front().get<2>());
|
|
|
|
std::pop_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
vecPriority.pop_back();
|
|
|
|
// second layer cached modifications just for this transaction
|
|
CCoinsViewCache viewTemp(view, true);
|
|
|
|
// Size limits
|
|
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
|
|
if (nBlockSize + nTxSize >= nBlockMaxSize)
|
|
continue;
|
|
|
|
// Legacy limits on sigOps:
|
|
unsigned int nTxSigOps = tx.GetLegacySigOpCount();
|
|
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
|
|
continue;
|
|
|
|
// Skip free transactions if we're past the minimum block size:
|
|
if (fSortedByFee && (dFeePerKb < nMinTxFee) && (nBlockSize + nTxSize >= nBlockMinSize))
|
|
continue;
|
|
|
|
// Prioritize by fee once past the priority size or we run out of high-priority
|
|
// transactions:
|
|
if (!fSortedByFee &&
|
|
((nBlockSize + nTxSize >= nBlockPrioritySize) || (dPriority < COIN * 144 / 250)))
|
|
{
|
|
fSortedByFee = true;
|
|
comparer = TxPriorityCompare(fSortedByFee);
|
|
std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
}
|
|
|
|
if (!tx.HaveInputs(viewTemp))
|
|
continue;
|
|
|
|
int64 nTxFees = tx.GetValueIn(viewTemp)-tx.GetValueOut();
|
|
|
|
nTxSigOps += tx.GetP2SHSigOpCount(viewTemp);
|
|
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
|
|
continue;
|
|
|
|
if (!tx.CheckInputs(viewTemp, CS_ALWAYS, SCRIPT_VERIFY_P2SH))
|
|
continue;
|
|
|
|
CTxUndo txundo;
|
|
uint256 hash = tx.GetHash();
|
|
if (!tx.UpdateCoins(viewTemp, txundo, pindexPrev->nHeight+1, hash))
|
|
continue;
|
|
|
|
// push changes from the second layer cache to the first one
|
|
viewTemp.Flush();
|
|
|
|
// Added
|
|
pblock->vtx.push_back(tx);
|
|
nBlockSize += nTxSize;
|
|
++nBlockTx;
|
|
nBlockSigOps += nTxSigOps;
|
|
nFees += nTxFees;
|
|
|
|
if (fDebug && GetBoolArg("-printpriority"))
|
|
{
|
|
printf("priority %.1f feeperkb %.1f txid %s\n",
|
|
dPriority, dFeePerKb, tx.GetHash().ToString().c_str());
|
|
}
|
|
|
|
// Add transactions that depend on this one to the priority queue
|
|
if (mapDependers.count(hash))
|
|
{
|
|
BOOST_FOREACH(COrphan* porphan, mapDependers[hash])
|
|
{
|
|
if (!porphan->setDependsOn.empty())
|
|
{
|
|
porphan->setDependsOn.erase(hash);
|
|
if (porphan->setDependsOn.empty())
|
|
{
|
|
vecPriority.push_back(TxPriority(porphan->dPriority, porphan->dFeePerKb, porphan->ptx));
|
|
std::push_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
nLastBlockTx = nBlockTx;
|
|
nLastBlockSize = nBlockSize;
|
|
printf("CreateNewBlock(): total size %"PRI64u"\n", nBlockSize);
|
|
|
|
pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nHeight+1, nFees);
|
|
|
|
// Fill in header
|
|
pblock->hashPrevBlock = pindexPrev->GetBlockHash();
|
|
pblock->UpdateTime(pindexPrev);
|
|
pblock->nBits = GetNextWorkRequired(pindexPrev, pblock.get());
|
|
pblock->nNonce = 0;
|
|
pblock->vtx[0].vin[0].scriptSig = CScript() << OP_0 << OP_0;
|
|
|
|
CBlockIndex indexDummy(*pblock);
|
|
indexDummy.pprev = pindexPrev;
|
|
indexDummy.nHeight = pindexPrev->nHeight + 1;
|
|
CCoinsViewCache viewNew(*pcoinsTip, true);
|
|
if (!pblock->ConnectBlock(&indexDummy, viewNew, true))
|
|
throw std::runtime_error("CreateNewBlock() : ConnectBlock failed");
|
|
}
|
|
|
|
return pblock.release();
|
|
}
|
|
|
|
|
|
void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
|
|
{
|
|
// Update nExtraNonce
|
|
static uint256 hashPrevBlock;
|
|
if (hashPrevBlock != pblock->hashPrevBlock)
|
|
{
|
|
nExtraNonce = 0;
|
|
hashPrevBlock = pblock->hashPrevBlock;
|
|
}
|
|
++nExtraNonce;
|
|
unsigned int nHeight = pindexPrev->nHeight+1; // Height first in coinbase required for block.version=2
|
|
pblock->vtx[0].vin[0].scriptSig = (CScript() << nHeight << CBigNum(nExtraNonce)) + COINBASE_FLAGS;
|
|
assert(pblock->vtx[0].vin[0].scriptSig.size() <= 100);
|
|
|
|
pblock->hashMerkleRoot = pblock->BuildMerkleTree();
|
|
}
|
|
|
|
|
|
void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
|
|
{
|
|
//
|
|
// Pre-build hash buffers
|
|
//
|
|
struct
|
|
{
|
|
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;
|
|
memset(&tmp, 0, sizeof(tmp));
|
|
|
|
tmp.block.nVersion = pblock->nVersion;
|
|
tmp.block.hashPrevBlock = pblock->hashPrevBlock;
|
|
tmp.block.hashMerkleRoot = pblock->hashMerkleRoot;
|
|
tmp.block.nTime = pblock->nTime;
|
|
tmp.block.nBits = pblock->nBits;
|
|
tmp.block.nNonce = pblock->nNonce;
|
|
|
|
FormatHashBlocks(&tmp.block, sizeof(tmp.block));
|
|
FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
|
|
|
|
// Byte swap all the input buffer
|
|
for (unsigned int i = 0; i < sizeof(tmp)/4; i++)
|
|
((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
|
|
|
|
// Precalc the first half of the first hash, which stays constant
|
|
SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
|
|
|
|
memcpy(pdata, &tmp.block, 128);
|
|
memcpy(phash1, &tmp.hash1, 64);
|
|
}
|
|
|
|
|
|
bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
|
|
{
|
|
uint256 hash = pblock->GetHash();
|
|
uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
|
|
|
|
if (hash > hashTarget)
|
|
return false;
|
|
|
|
//// 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();
|
|
printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str());
|
|
|
|
// Found a solution
|
|
{
|
|
LOCK(cs_main);
|
|
if (pblock->hashPrevBlock != hashBestChain)
|
|
return error("BitcoinMiner : generated block is stale");
|
|
|
|
// Remove key from key pool
|
|
reservekey.KeepKey();
|
|
|
|
// Track how many getdata requests this block gets
|
|
{
|
|
LOCK(wallet.cs_wallet);
|
|
wallet.mapRequestCount[pblock->GetHash()] = 0;
|
|
}
|
|
|
|
// Process this block the same as if we had received it from another node
|
|
if (!ProcessBlock(NULL, pblock))
|
|
return error("BitcoinMiner : ProcessBlock, block not accepted");
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void static ThreadBitcoinMiner(void* parg);
|
|
|
|
static bool fGenerateBitcoins = false;
|
|
static bool fLimitProcessors = false;
|
|
static int nLimitProcessors = -1;
|
|
|
|
void static BitcoinMiner(CWallet *pwallet)
|
|
{
|
|
printf("BitcoinMiner started\n");
|
|
SetThreadPriority(THREAD_PRIORITY_LOWEST);
|
|
|
|
// Make this thread recognisable as the mining thread
|
|
RenameThread("bitcoin-miner");
|
|
|
|
// Each thread has its own key and counter
|
|
CReserveKey reservekey(pwallet);
|
|
unsigned int nExtraNonce = 0;
|
|
|
|
while (fGenerateBitcoins)
|
|
{
|
|
if (fShutdown)
|
|
return;
|
|
while (vNodes.empty() || IsInitialBlockDownload())
|
|
{
|
|
Sleep(1000);
|
|
if (fShutdown)
|
|
return;
|
|
if (!fGenerateBitcoins)
|
|
return;
|
|
}
|
|
|
|
|
|
//
|
|
// Create new block
|
|
//
|
|
unsigned int nTransactionsUpdatedLast = nTransactionsUpdated;
|
|
CBlockIndex* pindexPrev = pindexBest;
|
|
|
|
auto_ptr<CBlock> pblock(CreateNewBlock(reservekey));
|
|
if (!pblock.get())
|
|
return;
|
|
IncrementExtraNonce(pblock.get(), pindexPrev, nExtraNonce);
|
|
|
|
printf("Running BitcoinMiner with %"PRIszu" transactions in block (%u bytes)\n", pblock->vtx.size(),
|
|
::GetSerializeSize(*pblock, SER_NETWORK, PROTOCOL_VERSION));
|
|
|
|
|
|
//
|
|
// Pre-build hash buffers
|
|
//
|
|
char pmidstatebuf[32+16]; char* pmidstate = alignup<16>(pmidstatebuf);
|
|
char pdatabuf[128+16]; char* pdata = alignup<16>(pdatabuf);
|
|
char phash1buf[64+16]; char* phash1 = alignup<16>(phash1buf);
|
|
|
|
FormatHashBuffers(pblock.get(), pmidstate, pdata, phash1);
|
|
|
|
unsigned int& nBlockTime = *(unsigned int*)(pdata + 64 + 4);
|
|
unsigned int& nBlockBits = *(unsigned int*)(pdata + 64 + 8);
|
|
unsigned int& nBlockNonce = *(unsigned int*)(pdata + 64 + 12);
|
|
|
|
|
|
//
|
|
// Search
|
|
//
|
|
int64 nStart = GetTime();
|
|
uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
|
|
uint256 hashbuf[2];
|
|
uint256& hash = *alignup<16>(hashbuf);
|
|
loop
|
|
{
|
|
unsigned int nHashesDone = 0;
|
|
unsigned int nNonceFound;
|
|
|
|
// Crypto++ SHA256
|
|
nNonceFound = ScanHash_CryptoPP(pmidstate, pdata + 64, phash1,
|
|
(char*)&hash, nHashesDone);
|
|
|
|
// Check if something found
|
|
if (nNonceFound != (unsigned int) -1)
|
|
{
|
|
for (unsigned int i = 0; i < sizeof(hash)/4; i++)
|
|
((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]);
|
|
|
|
if (hash <= hashTarget)
|
|
{
|
|
// Found a solution
|
|
pblock->nNonce = ByteReverse(nNonceFound);
|
|
assert(hash == pblock->GetHash());
|
|
|
|
SetThreadPriority(THREAD_PRIORITY_NORMAL);
|
|
CheckWork(pblock.get(), *pwalletMain, reservekey);
|
|
SetThreadPriority(THREAD_PRIORITY_LOWEST);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Meter hashes/sec
|
|
static int64 nHashCounter;
|
|
if (nHPSTimerStart == 0)
|
|
{
|
|
nHPSTimerStart = GetTimeMillis();
|
|
nHashCounter = 0;
|
|
}
|
|
else
|
|
nHashCounter += nHashesDone;
|
|
if (GetTimeMillis() - nHPSTimerStart > 4000)
|
|
{
|
|
static CCriticalSection cs;
|
|
{
|
|
LOCK(cs);
|
|
if (GetTimeMillis() - nHPSTimerStart > 4000)
|
|
{
|
|
dHashesPerSec = 1000.0 * nHashCounter / (GetTimeMillis() - nHPSTimerStart);
|
|
nHPSTimerStart = GetTimeMillis();
|
|
nHashCounter = 0;
|
|
static int64 nLogTime;
|
|
if (GetTime() - nLogTime > 30 * 60)
|
|
{
|
|
nLogTime = GetTime();
|
|
printf("hashmeter %3d CPUs %6.0f khash/s\n", vnThreadsRunning[THREAD_MINER], dHashesPerSec/1000.0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check for stop or if block needs to be rebuilt
|
|
if (fShutdown)
|
|
return;
|
|
if (!fGenerateBitcoins)
|
|
return;
|
|
if (fLimitProcessors && vnThreadsRunning[THREAD_MINER] > nLimitProcessors)
|
|
return;
|
|
if (vNodes.empty())
|
|
break;
|
|
if (nBlockNonce >= 0xffff0000)
|
|
break;
|
|
if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60)
|
|
break;
|
|
if (pindexPrev != pindexBest)
|
|
break;
|
|
|
|
// Update nTime every few seconds
|
|
pblock->UpdateTime(pindexPrev);
|
|
nBlockTime = ByteReverse(pblock->nTime);
|
|
if (fTestNet)
|
|
{
|
|
// Changing pblock->nTime can change work required on testnet:
|
|
nBlockBits = ByteReverse(pblock->nBits);
|
|
hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void static ThreadBitcoinMiner(void* parg)
|
|
{
|
|
CWallet* pwallet = (CWallet*)parg;
|
|
try
|
|
{
|
|
vnThreadsRunning[THREAD_MINER]++;
|
|
BitcoinMiner(pwallet);
|
|
vnThreadsRunning[THREAD_MINER]--;
|
|
}
|
|
catch (std::exception& e) {
|
|
vnThreadsRunning[THREAD_MINER]--;
|
|
PrintException(&e, "ThreadBitcoinMiner()");
|
|
} catch (...) {
|
|
vnThreadsRunning[THREAD_MINER]--;
|
|
PrintException(NULL, "ThreadBitcoinMiner()");
|
|
}
|
|
nHPSTimerStart = 0;
|
|
if (vnThreadsRunning[THREAD_MINER] == 0)
|
|
dHashesPerSec = 0;
|
|
printf("ThreadBitcoinMiner exiting, %d threads remaining\n", vnThreadsRunning[THREAD_MINER]);
|
|
}
|
|
|
|
|
|
void GenerateBitcoins(bool fGenerate, CWallet* pwallet)
|
|
{
|
|
fGenerateBitcoins = fGenerate;
|
|
nLimitProcessors = GetArg("-genproclimit", -1);
|
|
if (nLimitProcessors == 0)
|
|
fGenerateBitcoins = false;
|
|
fLimitProcessors = (nLimitProcessors != -1);
|
|
|
|
if (fGenerate)
|
|
{
|
|
int nProcessors = boost::thread::hardware_concurrency();
|
|
printf("%d processors\n", nProcessors);
|
|
if (nProcessors < 1)
|
|
nProcessors = 1;
|
|
if (fLimitProcessors && nProcessors > nLimitProcessors)
|
|
nProcessors = nLimitProcessors;
|
|
int nAddThreads = nProcessors - vnThreadsRunning[THREAD_MINER];
|
|
printf("Starting %d BitcoinMiner threads\n", nAddThreads);
|
|
for (int i = 0; i < nAddThreads; i++)
|
|
{
|
|
if (!NewThread(ThreadBitcoinMiner, pwallet))
|
|
printf("Error: NewThread(ThreadBitcoinMiner) failed\n");
|
|
Sleep(10);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Amount compression:
|
|
// * If the amount is 0, output 0
|
|
// * first, divide the amount (in base units) by the largest power of 10 possible; call the exponent e (e is max 9)
|
|
// * if e<9, the last digit of the resulting number cannot be 0; store it as d, and drop it (divide by 10)
|
|
// * call the result n
|
|
// * output 1 + 10*(9*n + d - 1) + e
|
|
// * if e==9, we only know the resulting number is not zero, so output 1 + 10*(n - 1) + 9
|
|
// (this is decodable, as d is in [1-9] and e is in [0-9])
|
|
|
|
uint64 CTxOutCompressor::CompressAmount(uint64 n)
|
|
{
|
|
if (n == 0)
|
|
return 0;
|
|
int e = 0;
|
|
while (((n % 10) == 0) && e < 9) {
|
|
n /= 10;
|
|
e++;
|
|
}
|
|
if (e < 9) {
|
|
int d = (n % 10);
|
|
assert(d >= 1 && d <= 9);
|
|
n /= 10;
|
|
return 1 + (n*9 + d - 1)*10 + e;
|
|
} else {
|
|
return 1 + (n - 1)*10 + 9;
|
|
}
|
|
}
|
|
|
|
uint64 CTxOutCompressor::DecompressAmount(uint64 x)
|
|
{
|
|
// x = 0 OR x = 1+10*(9*n + d - 1) + e OR x = 1+10*(n - 1) + 9
|
|
if (x == 0)
|
|
return 0;
|
|
x--;
|
|
// x = 10*(9*n + d - 1) + e
|
|
int e = x % 10;
|
|
x /= 10;
|
|
uint64 n = 0;
|
|
if (e < 9) {
|
|
// x = 9*n + d - 1
|
|
int d = (x % 9) + 1;
|
|
x /= 9;
|
|
// x = n
|
|
n = x*10 + d;
|
|
} else {
|
|
n = x+1;
|
|
}
|
|
while (e) {
|
|
n *= 10;
|
|
e--;
|
|
}
|
|
return n;
|
|
}
|