diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/chain.cpp | 59 | ||||
| -rw-r--r-- | src/chain.h | 390 | ||||
| -rw-r--r-- | src/init.cpp | 2 | ||||
| -rw-r--r-- | src/main.cpp | 65 | ||||
| -rw-r--r-- | src/main.h | 385 |
6 files changed, 461 insertions, 442 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 94a582dfac..2c64cb74a0 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -67,6 +67,7 @@ BITCOIN_CORE_H = \ allocators.h \ base58.h \ bloom.h \ + chain.h \ chainparams.h \ chainparamsbase.h \ chainparamsseeds.h \ @@ -145,6 +146,7 @@ libbitcoin_server_a_SOURCES = \ addrman.cpp \ alert.cpp \ bloom.cpp \ + chain.cpp \ checkpoints.cpp \ init.cpp \ leveldbwrapper.cpp \ diff --git a/src/chain.cpp b/src/chain.cpp new file mode 100644 index 0000000000..bcb497b2d4 --- /dev/null +++ b/src/chain.cpp @@ -0,0 +1,59 @@ +// Copyright (c) 2009-2010 Satoshi Nakamoto +// Copyright (c) 2009-2014 The Bitcoin developers +// Distributed under the MIT/X11 software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#include "chain.h" + +using namespace std; + +// CChain implementation + +CBlockIndex *CChain::SetTip(CBlockIndex *pindex) { + if (pindex == NULL) { + vChain.clear(); + return NULL; + } + vChain.resize(pindex->nHeight + 1); + while (pindex && vChain[pindex->nHeight] != pindex) { + vChain[pindex->nHeight] = pindex; + pindex = pindex->pprev; + } + return pindex; +} + +CBlockLocator CChain::GetLocator(const CBlockIndex *pindex) const { + int nStep = 1; + std::vector<uint256> vHave; + vHave.reserve(32); + + if (!pindex) + pindex = Tip(); + while (pindex) { + vHave.push_back(pindex->GetBlockHash()); + // Stop when we have added the genesis block. + if (pindex->nHeight == 0) + break; + // Exponentially larger steps back, plus the genesis block. + int nHeight = std::max(pindex->nHeight - nStep, 0); + if (Contains(pindex)) { + // Use O(1) CChain index if possible. + pindex = (*this)[nHeight]; + } else { + // Otherwise, use O(log n) skiplist. + pindex = pindex->GetAncestor(nHeight); + } + if (vHave.size() > 10) + nStep *= 2; + } + + return CBlockLocator(vHave); +} + +const CBlockIndex *CChain::FindFork(const CBlockIndex *pindex) const { + if (pindex->nHeight > Height()) + pindex = pindex->GetAncestor(Height()); + while (pindex && !Contains(pindex)) + pindex = pindex->pprev; + return pindex; +} diff --git a/src/chain.h b/src/chain.h new file mode 100644 index 0000000000..91bdf38347 --- /dev/null +++ b/src/chain.h @@ -0,0 +1,390 @@ +// Copyright (c) 2009-2010 Satoshi Nakamoto +// Copyright (c) 2009-2014 The Bitcoin developers +// Distributed under the MIT/X11 software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#ifndef H_BITCOIN_CHAIN +#define H_BITCOIN_CHAIN + +#include "core.h" +#include "pow.h" +#include "uint256.h" + +#include <vector> + +#include <boost/foreach.hpp> + +struct CDiskBlockPos +{ + int nFile; + unsigned int nPos; + + ADD_SERIALIZE_METHODS; + + template <typename Stream, typename Operation> + inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { + READWRITE(VARINT(nFile)); + READWRITE(VARINT(nPos)); + } + + CDiskBlockPos() { + SetNull(); + } + + CDiskBlockPos(int nFileIn, unsigned int nPosIn) { + nFile = nFileIn; + nPos = nPosIn; + } + + friend bool operator==(const CDiskBlockPos &a, const CDiskBlockPos &b) { + return (a.nFile == b.nFile && a.nPos == b.nPos); + } + + friend bool operator!=(const CDiskBlockPos &a, const CDiskBlockPos &b) { + return !(a == b); + } + + void SetNull() { nFile = -1; nPos = 0; } + bool IsNull() const { return (nFile == -1); } +}; + +enum BlockStatus { + BLOCK_VALID_UNKNOWN = 0, + BLOCK_VALID_HEADER = 1, // parsed, version ok, hash satisfies claimed PoW, 1 <= vtx count <= max, timestamp not in future + BLOCK_VALID_TREE = 2, // parent found, difficulty matches, timestamp >= median previous, checkpoint + BLOCK_VALID_TRANSACTIONS = 3, // only first tx is coinbase, 2 <= coinbase input script length <= 100, transactions valid, no duplicate txids, sigops, size, merkle root + BLOCK_VALID_CHAIN = 4, // outputs do not overspend inputs, no double spends, coinbase output ok, immature coinbase spends, BIP30 + BLOCK_VALID_SCRIPTS = 5, // scripts/signatures ok + BLOCK_VALID_MASK = BLOCK_VALID_HEADER | BLOCK_VALID_TREE | BLOCK_VALID_TRANSACTIONS | + BLOCK_VALID_CHAIN | BLOCK_VALID_SCRIPTS, + + BLOCK_HAVE_DATA = 8, // full block available in blk*.dat + BLOCK_HAVE_UNDO = 16, // undo data available in rev*.dat + BLOCK_HAVE_MASK = BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO, + + BLOCK_FAILED_VALID = 32, // stage after last reached validness failed + BLOCK_FAILED_CHILD = 64, // descends from failed block + BLOCK_FAILED_MASK = BLOCK_FAILED_VALID | BLOCK_FAILED_CHILD, +}; + +/** The block chain is a tree shaped structure starting with the + * genesis block at the root, with each block potentially having multiple + * candidates to be the next block. A blockindex may have multiple pprev pointing + * to it, but at most one of them can be part of the currently active branch. + */ +class CBlockIndex +{ +public: + // pointer to the hash of the block, if any. memory is owned by this CBlockIndex + const uint256* phashBlock; + + // pointer to the index of the predecessor of this block + CBlockIndex* pprev; + + // pointer to the index of some further predecessor of this block + CBlockIndex* pskip; + + // height of the entry in the chain. The genesis block has height 0 + int nHeight; + + // Which # file this block is stored in (blk?????.dat) + int nFile; + + // Byte offset within blk?????.dat where this block's data is stored + unsigned int nDataPos; + + // Byte offset within rev?????.dat where this block's undo data is stored + unsigned int nUndoPos; + + // (memory only) Total amount of work (expected number of hashes) in the chain up to and including this block + uint256 nChainWork; + + // Number of transactions in this block. + // Note: in a potential headers-first mode, this number cannot be relied upon + unsigned int nTx; + + // (memory only) Number of transactions in the chain up to and including this block + unsigned int nChainTx; // change to 64-bit type when necessary; won't happen before 2030 + + // Verification status of this block. See enum BlockStatus + unsigned int nStatus; + + // block header + int nVersion; + uint256 hashMerkleRoot; + unsigned int nTime; + unsigned int nBits; + unsigned int nNonce; + + // (memory only) Sequencial id assigned to distinguish order in which blocks are received. + uint32_t nSequenceId; + + void SetNull() + { + phashBlock = NULL; + pprev = NULL; + pskip = NULL; + nHeight = 0; + nFile = 0; + nDataPos = 0; + nUndoPos = 0; + nChainWork = 0; + nTx = 0; + nChainTx = 0; + nStatus = 0; + nSequenceId = 0; + + nVersion = 0; + hashMerkleRoot = 0; + nTime = 0; + nBits = 0; + nNonce = 0; + } + + CBlockIndex() + { + SetNull(); + } + + CBlockIndex(CBlockHeader& block) + { + SetNull(); + + nVersion = block.nVersion; + hashMerkleRoot = block.hashMerkleRoot; + nTime = block.nTime; + nBits = block.nBits; + nNonce = block.nNonce; + } + + CDiskBlockPos GetBlockPos() const { + CDiskBlockPos ret; + if (nStatus & BLOCK_HAVE_DATA) { + ret.nFile = nFile; + ret.nPos = nDataPos; + } + return ret; + } + + CDiskBlockPos GetUndoPos() const { + CDiskBlockPos ret; + if (nStatus & BLOCK_HAVE_UNDO) { + ret.nFile = nFile; + ret.nPos = nUndoPos; + } + return ret; + } + + CBlockHeader GetBlockHeader() const + { + CBlockHeader block; + block.nVersion = nVersion; + if (pprev) + block.hashPrevBlock = pprev->GetBlockHash(); + block.hashMerkleRoot = hashMerkleRoot; + block.nTime = nTime; + block.nBits = nBits; + block.nNonce = nNonce; + return block; + } + + uint256 GetBlockHash() const + { + return *phashBlock; + } + + int64_t GetBlockTime() const + { + return (int64_t)nTime; + } + + uint256 GetBlockWork() const + { + return GetProofIncrement(nBits); + } + + enum { nMedianTimeSpan=11 }; + + int64_t GetMedianTimePast() const + { + int64_t pmedian[nMedianTimeSpan]; + int64_t* pbegin = &pmedian[nMedianTimeSpan]; + int64_t* pend = &pmedian[nMedianTimeSpan]; + + const CBlockIndex* pindex = this; + for (int i = 0; i < nMedianTimeSpan && pindex; i++, pindex = pindex->pprev) + *(--pbegin) = pindex->GetBlockTime(); + + std::sort(pbegin, pend); + return pbegin[(pend - pbegin)/2]; + } + + /** + * Returns true if there are nRequired or more blocks of minVersion or above + * in the last Params().ToCheckBlockUpgradeMajority() blocks, starting at pstart + * and going backwards. + */ + static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, + unsigned int nRequired); + + std::string ToString() const + { + return strprintf("CBlockIndex(pprev=%p, nHeight=%d, merkle=%s, hashBlock=%s)", + pprev, nHeight, + hashMerkleRoot.ToString(), + GetBlockHash().ToString()); + } + + // Check whether this block index entry is valid up to the passed validity level. + bool IsValid(enum BlockStatus nUpTo = BLOCK_VALID_TRANSACTIONS) const + { + assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed. + if (nStatus & BLOCK_FAILED_MASK) + return false; + return ((nStatus & BLOCK_VALID_MASK) >= nUpTo); + } + + // Raise the validity level of this block index entry. + // Returns true if the validity was changed. + bool RaiseValidity(enum BlockStatus nUpTo) + { + assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed. + if (nStatus & BLOCK_FAILED_MASK) + return false; + if ((nStatus & BLOCK_VALID_MASK) < nUpTo) { + nStatus = (nStatus & ~BLOCK_VALID_MASK) | nUpTo; + return true; + } + return false; + } + + // Build the skiplist pointer for this entry. + void BuildSkip(); + + // Efficiently find an ancestor of this block. + CBlockIndex* GetAncestor(int height); + const CBlockIndex* GetAncestor(int height) const; +}; + +/** Used to marshal pointers into hashes for db storage. */ +class CDiskBlockIndex : public CBlockIndex +{ +public: + uint256 hashPrev; + + CDiskBlockIndex() { + hashPrev = 0; + } + + explicit CDiskBlockIndex(CBlockIndex* pindex) : CBlockIndex(*pindex) { + hashPrev = (pprev ? pprev->GetBlockHash() : 0); + } + + ADD_SERIALIZE_METHODS; + + template <typename Stream, typename Operation> + inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { + if (!(nType & SER_GETHASH)) + READWRITE(VARINT(nVersion)); + + READWRITE(VARINT(nHeight)); + READWRITE(VARINT(nStatus)); + READWRITE(VARINT(nTx)); + if (nStatus & (BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO)) + READWRITE(VARINT(nFile)); + if (nStatus & BLOCK_HAVE_DATA) + READWRITE(VARINT(nDataPos)); + if (nStatus & BLOCK_HAVE_UNDO) + READWRITE(VARINT(nUndoPos)); + + // block header + READWRITE(this->nVersion); + READWRITE(hashPrev); + READWRITE(hashMerkleRoot); + READWRITE(nTime); + READWRITE(nBits); + READWRITE(nNonce); + } + + uint256 GetBlockHash() const + { + CBlockHeader block; + block.nVersion = nVersion; + block.hashPrevBlock = hashPrev; + block.hashMerkleRoot = hashMerkleRoot; + block.nTime = nTime; + block.nBits = nBits; + block.nNonce = nNonce; + return block.GetHash(); + } + + + std::string ToString() const + { + std::string str = "CDiskBlockIndex("; + str += CBlockIndex::ToString(); + str += strprintf("\n hashBlock=%s, hashPrev=%s)", + GetBlockHash().ToString(), + hashPrev.ToString()); + return str; + } +}; + +/** An in-memory indexed chain of blocks. */ +class CChain { +private: + std::vector<CBlockIndex*> vChain; + +public: + /** Returns the index entry for the genesis block of this chain, or NULL if none. */ + CBlockIndex *Genesis() const { + return vChain.size() > 0 ? vChain[0] : NULL; + } + + /** Returns the index entry for the tip of this chain, or NULL if none. */ + CBlockIndex *Tip() const { + return vChain.size() > 0 ? vChain[vChain.size() - 1] : NULL; + } + + /** Returns the index entry at a particular height in this chain, or NULL if no such height exists. */ + CBlockIndex *operator[](int nHeight) const { + if (nHeight < 0 || nHeight >= (int)vChain.size()) + return NULL; + return vChain[nHeight]; + } + + /** Compare two chains efficiently. */ + friend bool operator==(const CChain &a, const CChain &b) { + return a.vChain.size() == b.vChain.size() && + a.vChain[a.vChain.size() - 1] == b.vChain[b.vChain.size() - 1]; + } + + /** Efficiently check whether a block is present in this chain. */ + bool Contains(const CBlockIndex *pindex) const { + return (*this)[pindex->nHeight] == pindex; + } + + /** Find the successor of a block in this chain, or NULL if the given index is not found or is the tip. */ + CBlockIndex *Next(const CBlockIndex *pindex) const { + if (Contains(pindex)) + return (*this)[pindex->nHeight + 1]; + else + return NULL; + } + + /** Return the maximal height in the chain. Is equal to chain.Tip() ? chain.Tip()->nHeight : -1. */ + int Height() const { + return vChain.size() - 1; + } + + /** Set/initialize a chain with a given tip. Returns the forking point. */ + CBlockIndex *SetTip(CBlockIndex *pindex); + + /** Return a CBlockLocator that refers to a block in this chain (by default the tip). */ + CBlockLocator GetLocator(const CBlockIndex *pindex = NULL) const; + + /** Find the last common block between this chain and a block index entry. */ + const CBlockIndex *FindFork(const CBlockIndex *pindex) const; +}; + +#endif diff --git a/src/init.cpp b/src/init.cpp index 27594ecbe3..85f4d360d2 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -1159,7 +1159,7 @@ bool AppInit2(boost::thread_group& threadGroup) CWalletDB walletdb(strWalletFile); CBlockLocator locator; if (walletdb.ReadBestBlock(locator)) - pindexRescan = chainActive.FindFork(locator); + pindexRescan = FindForkInGlobalIndex(chainActive, locator); else pindexRescan = chainActive.Genesis(); } diff --git a/src/main.cpp b/src/main.cpp index 60e2a56795..9a4271eda2 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -391,72 +391,19 @@ void UnregisterNodeSignals(CNodeSignals& nodeSignals) nodeSignals.FinalizeNode.disconnect(&FinalizeNode); } -////////////////////////////////////////////////////////////////////////////// -// -// CChain implementation -// - -CBlockIndex *CChain::SetTip(CBlockIndex *pindex) { - if (pindex == NULL) { - vChain.clear(); - return NULL; - } - vChain.resize(pindex->nHeight + 1); - while (pindex && vChain[pindex->nHeight] != pindex) { - vChain[pindex->nHeight] = pindex; - pindex = pindex->pprev; - } - return pindex; -} - -CBlockLocator CChain::GetLocator(const CBlockIndex *pindex) const { - int nStep = 1; - std::vector<uint256> vHave; - vHave.reserve(32); - - if (!pindex) - pindex = Tip(); - while (pindex) { - vHave.push_back(pindex->GetBlockHash()); - // Stop when we have added the genesis block. - if (pindex->nHeight == 0) - break; - // Exponentially larger steps back, plus the genesis block. - int nHeight = std::max(pindex->nHeight - nStep, 0); - if (Contains(pindex)) { - // Use O(1) CChain index if possible. - pindex = (*this)[nHeight]; - } else { - // Otherwise, use O(log n) skiplist. - pindex = pindex->GetAncestor(nHeight); - } - if (vHave.size() > 10) - nStep *= 2; - } - - return CBlockLocator(vHave); -} - -CBlockIndex *CChain::FindFork(const CBlockLocator &locator) const { +CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator) +{ // Find the first block the caller has in the main chain BOOST_FOREACH(const uint256& hash, locator.vHave) { BlockMap::iterator mi = mapBlockIndex.find(hash); if (mi != mapBlockIndex.end()) { CBlockIndex* pindex = (*mi).second; - if (Contains(pindex)) + if (chain.Contains(pindex)) return pindex; } } - return Genesis(); -} - -const CBlockIndex *CChain::FindFork(const CBlockIndex *pindex) const { - if (pindex->nHeight > Height()) - pindex = pindex->GetAncestor(Height()); - while (pindex && !Contains(pindex)) - pindex = pindex->pprev; - return pindex; + return chain.Genesis(); } CCoinsViewCache *pcoinsTip = NULL; @@ -3709,7 +3656,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, LOCK(cs_main); // Find the last block the caller has in the main chain - CBlockIndex* pindex = chainActive.FindFork(locator); + CBlockIndex* pindex = FindForkInGlobalIndex(chainActive, locator); // Send the rest of the chain if (pindex) @@ -3756,7 +3703,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv, else { // Find the last block the caller has in the main chain - pindex = chainActive.FindFork(locator); + pindex = FindForkInGlobalIndex(chainActive, locator); if (pindex) pindex = chainActive.Next(pindex); } diff --git a/src/main.h b/src/main.h index 5acc551793..c75841538f 100644 --- a/src/main.h +++ b/src/main.h @@ -10,6 +10,7 @@ #include "config/bitcoin-config.h" #endif +#include "chain.h" #include "chainparams.h" #include "coins.h" #include "core.h" @@ -113,7 +114,6 @@ static const uint64_t nMinDiskSpace = 52428800; class CBlockTreeDB; -struct CDiskBlockPos; class CTxUndo; class CScriptCheck; class CValidationState; @@ -189,51 +189,11 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa bool* pfMissingInputs, bool fRejectInsaneFee=false); - - - - - - struct CNodeStateStats { int nMisbehavior; int nSyncHeight; }; -struct CDiskBlockPos -{ - int nFile; - unsigned int nPos; - - ADD_SERIALIZE_METHODS; - - template <typename Stream, typename Operation> - inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { - READWRITE(VARINT(nFile)); - READWRITE(VARINT(nPos)); - } - - CDiskBlockPos() { - SetNull(); - } - - CDiskBlockPos(int nFileIn, unsigned int nPosIn) { - nFile = nFileIn; - nPos = nPosIn; - } - - friend bool operator==(const CDiskBlockPos &a, const CDiskBlockPos &b) { - return (a.nFile == b.nFile && a.nPos == b.nPos); - } - - friend bool operator!=(const CDiskBlockPos &a, const CDiskBlockPos &b) { - return !(a == b); - } - - void SetNull() { nFile = -1; nPos = 0; } - bool IsNull() const { return (nFile == -1); } -}; - struct CDiskTxPos : public CDiskBlockPos { unsigned int nTxOffset; // after header @@ -545,288 +505,6 @@ public: } }; -enum BlockStatus { - BLOCK_VALID_UNKNOWN = 0, - BLOCK_VALID_HEADER = 1, // parsed, version ok, hash satisfies claimed PoW, 1 <= vtx count <= max, timestamp not in future - BLOCK_VALID_TREE = 2, // parent found, difficulty matches, timestamp >= median previous, checkpoint - BLOCK_VALID_TRANSACTIONS = 3, // only first tx is coinbase, 2 <= coinbase input script length <= 100, transactions valid, no duplicate txids, sigops, size, merkle root - BLOCK_VALID_CHAIN = 4, // outputs do not overspend inputs, no double spends, coinbase output ok, immature coinbase spends, BIP30 - BLOCK_VALID_SCRIPTS = 5, // scripts/signatures ok - BLOCK_VALID_MASK = BLOCK_VALID_HEADER | BLOCK_VALID_TREE | BLOCK_VALID_TRANSACTIONS | - BLOCK_VALID_CHAIN | BLOCK_VALID_SCRIPTS, - - BLOCK_HAVE_DATA = 8, // full block available in blk*.dat - BLOCK_HAVE_UNDO = 16, // undo data available in rev*.dat - BLOCK_HAVE_MASK = BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO, - - BLOCK_FAILED_VALID = 32, // stage after last reached validness failed - BLOCK_FAILED_CHILD = 64, // descends from failed block - BLOCK_FAILED_MASK = BLOCK_FAILED_VALID | BLOCK_FAILED_CHILD, -}; - -/** The block chain is a tree shaped structure starting with the - * genesis block at the root, with each block potentially having multiple - * candidates to be the next block. A blockindex may have multiple pprev pointing - * to it, but at most one of them can be part of the currently active branch. - */ -class CBlockIndex -{ -public: - // pointer to the hash of the block, if any. memory is owned by this CBlockIndex - const uint256* phashBlock; - - // pointer to the index of the predecessor of this block - CBlockIndex* pprev; - - // pointer to the index of some further predecessor of this block - CBlockIndex* pskip; - - // height of the entry in the chain. The genesis block has height 0 - int nHeight; - - // Which # file this block is stored in (blk?????.dat) - int nFile; - - // Byte offset within blk?????.dat where this block's data is stored - unsigned int nDataPos; - - // Byte offset within rev?????.dat where this block's undo data is stored - unsigned int nUndoPos; - - // (memory only) Total amount of work (expected number of hashes) in the chain up to and including this block - uint256 nChainWork; - - // Number of transactions in this block. - // Note: in a potential headers-first mode, this number cannot be relied upon - unsigned int nTx; - - // (memory only) Number of transactions in the chain up to and including this block - unsigned int nChainTx; // change to 64-bit type when necessary; won't happen before 2030 - - // Verification status of this block. See enum BlockStatus - unsigned int nStatus; - - // block header - int nVersion; - uint256 hashMerkleRoot; - unsigned int nTime; - unsigned int nBits; - unsigned int nNonce; - - // (memory only) Sequencial id assigned to distinguish order in which blocks are received. - uint32_t nSequenceId; - - void SetNull() - { - phashBlock = NULL; - pprev = NULL; - pskip = NULL; - nHeight = 0; - nFile = 0; - nDataPos = 0; - nUndoPos = 0; - nChainWork = 0; - nTx = 0; - nChainTx = 0; - nStatus = 0; - nSequenceId = 0; - - nVersion = 0; - hashMerkleRoot = 0; - nTime = 0; - nBits = 0; - nNonce = 0; - } - - CBlockIndex() - { - SetNull(); - } - - CBlockIndex(CBlockHeader& block) - { - SetNull(); - - nVersion = block.nVersion; - hashMerkleRoot = block.hashMerkleRoot; - nTime = block.nTime; - nBits = block.nBits; - nNonce = block.nNonce; - } - - CDiskBlockPos GetBlockPos() const { - CDiskBlockPos ret; - if (nStatus & BLOCK_HAVE_DATA) { - ret.nFile = nFile; - ret.nPos = nDataPos; - } - return ret; - } - - CDiskBlockPos GetUndoPos() const { - CDiskBlockPos ret; - if (nStatus & BLOCK_HAVE_UNDO) { - ret.nFile = nFile; - ret.nPos = nUndoPos; - } - return ret; - } - - CBlockHeader GetBlockHeader() const - { - CBlockHeader block; - block.nVersion = nVersion; - if (pprev) - block.hashPrevBlock = pprev->GetBlockHash(); - block.hashMerkleRoot = hashMerkleRoot; - block.nTime = nTime; - block.nBits = nBits; - block.nNonce = nNonce; - return block; - } - - uint256 GetBlockHash() const - { - return *phashBlock; - } - - int64_t GetBlockTime() const - { - return (int64_t)nTime; - } - - uint256 GetBlockWork() const - { - return GetProofIncrement(nBits); - } - - enum { nMedianTimeSpan=11 }; - - int64_t GetMedianTimePast() const - { - int64_t pmedian[nMedianTimeSpan]; - int64_t* pbegin = &pmedian[nMedianTimeSpan]; - int64_t* pend = &pmedian[nMedianTimeSpan]; - - const CBlockIndex* pindex = this; - for (int i = 0; i < nMedianTimeSpan && pindex; i++, pindex = pindex->pprev) - *(--pbegin) = pindex->GetBlockTime(); - - std::sort(pbegin, pend); - return pbegin[(pend - pbegin)/2]; - } - - /** - * Returns true if there are nRequired or more blocks of minVersion or above - * in the last Params().ToCheckBlockUpgradeMajority() blocks, starting at pstart - * and going backwards. - */ - static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, - unsigned int nRequired); - - std::string ToString() const - { - return strprintf("CBlockIndex(pprev=%p, nHeight=%d, merkle=%s, hashBlock=%s)", - pprev, nHeight, - hashMerkleRoot.ToString(), - GetBlockHash().ToString()); - } - - // Check whether this block index entry is valid up to the passed validity level. - bool IsValid(enum BlockStatus nUpTo = BLOCK_VALID_TRANSACTIONS) const - { - assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed. - if (nStatus & BLOCK_FAILED_MASK) - return false; - return ((nStatus & BLOCK_VALID_MASK) >= nUpTo); - } - - // Raise the validity level of this block index entry. - // Returns true if the validity was changed. - bool RaiseValidity(enum BlockStatus nUpTo) - { - assert(!(nUpTo & ~BLOCK_VALID_MASK)); // Only validity flags allowed. - if (nStatus & BLOCK_FAILED_MASK) - return false; - if ((nStatus & BLOCK_VALID_MASK) < nUpTo) { - nStatus = (nStatus & ~BLOCK_VALID_MASK) | nUpTo; - return true; - } - return false; - } - - // Build the skiplist pointer for this entry. - void BuildSkip(); - - // Efficiently find an ancestor of this block. - CBlockIndex* GetAncestor(int height); - const CBlockIndex* GetAncestor(int height) const; -}; - -/** Used to marshal pointers into hashes for db storage. */ -class CDiskBlockIndex : public CBlockIndex -{ -public: - uint256 hashPrev; - - CDiskBlockIndex() { - hashPrev = 0; - } - - explicit CDiskBlockIndex(CBlockIndex* pindex) : CBlockIndex(*pindex) { - hashPrev = (pprev ? pprev->GetBlockHash() : 0); - } - - ADD_SERIALIZE_METHODS; - - template <typename Stream, typename Operation> - inline void SerializationOp(Stream& s, Operation ser_action, int nType, int nVersion) { - if (!(nType & SER_GETHASH)) - READWRITE(VARINT(nVersion)); - - READWRITE(VARINT(nHeight)); - READWRITE(VARINT(nStatus)); - READWRITE(VARINT(nTx)); - if (nStatus & (BLOCK_HAVE_DATA | BLOCK_HAVE_UNDO)) - READWRITE(VARINT(nFile)); - if (nStatus & BLOCK_HAVE_DATA) - READWRITE(VARINT(nDataPos)); - if (nStatus & BLOCK_HAVE_UNDO) - READWRITE(VARINT(nUndoPos)); - - // block header - READWRITE(this->nVersion); - READWRITE(hashPrev); - READWRITE(hashMerkleRoot); - READWRITE(nTime); - READWRITE(nBits); - READWRITE(nNonce); - } - - uint256 GetBlockHash() const - { - CBlockHeader block; - block.nVersion = nVersion; - block.hashPrevBlock = hashPrev; - block.hashMerkleRoot = hashMerkleRoot; - block.nTime = nTime; - block.nBits = nBits; - block.nNonce = nNonce; - return block.GetHash(); - } - - - std::string ToString() const - { - std::string str = "CDiskBlockIndex("; - str += CBlockIndex::ToString(); - str += strprintf("\n hashBlock=%s, hashPrev=%s)", - GetBlockHash().ToString(), - hashPrev.ToString()); - return str; - } -}; - /** Capture information about block/transaction validation */ class CValidationState { private: @@ -898,65 +576,8 @@ public: bool VerifyDB(CCoinsView *coinsview, int nCheckLevel, int nCheckDepth); }; -/** An in-memory indexed chain of blocks. */ -class CChain { -private: - std::vector<CBlockIndex*> vChain; - -public: - /** Returns the index entry for the genesis block of this chain, or NULL if none. */ - CBlockIndex *Genesis() const { - return vChain.size() > 0 ? vChain[0] : NULL; - } - - /** Returns the index entry for the tip of this chain, or NULL if none. */ - CBlockIndex *Tip() const { - return vChain.size() > 0 ? vChain[vChain.size() - 1] : NULL; - } - - /** Returns the index entry at a particular height in this chain, or NULL if no such height exists. */ - CBlockIndex *operator[](int nHeight) const { - if (nHeight < 0 || nHeight >= (int)vChain.size()) - return NULL; - return vChain[nHeight]; - } - - /** Compare two chains efficiently. */ - friend bool operator==(const CChain &a, const CChain &b) { - return a.vChain.size() == b.vChain.size() && - a.vChain[a.vChain.size() - 1] == b.vChain[b.vChain.size() - 1]; - } - - /** Efficiently check whether a block is present in this chain. */ - bool Contains(const CBlockIndex *pindex) const { - return (*this)[pindex->nHeight] == pindex; - } - - /** Find the successor of a block in this chain, or NULL if the given index is not found or is the tip. */ - CBlockIndex *Next(const CBlockIndex *pindex) const { - if (Contains(pindex)) - return (*this)[pindex->nHeight + 1]; - else - return NULL; - } - - /** Return the maximal height in the chain. Is equal to chain.Tip() ? chain.Tip()->nHeight : -1. */ - int Height() const { - return vChain.size() - 1; - } - - /** Set/initialize a chain with a given tip. Returns the forking point. */ - CBlockIndex *SetTip(CBlockIndex *pindex); - - /** Return a CBlockLocator that refers to a block in this chain (by default the tip). */ - CBlockLocator GetLocator(const CBlockIndex *pindex = NULL) const; - - /** Find the last common block between this chain and a locator. */ - CBlockIndex *FindFork(const CBlockLocator &locator) const; - - /** Find the last common block between this chain and a block index entry. */ - const CBlockIndex *FindFork(const CBlockIndex *pindex) const; -}; +/** Find the last common block between the parameter chain and a locator. */ +CBlockIndex* FindForkInGlobalIndex(const CChain& chain, const CBlockLocator& locator); /** The currently-connected chain of blocks. */ extern CChain chainActive; |