diff options
Diffstat (limited to 'src/main.h')
| -rw-r--r-- | src/main.h | 184 |
1 files changed, 99 insertions, 85 deletions
diff --git a/src/main.h b/src/main.h index caf8331ee1..ecf5489718 100644 --- a/src/main.h +++ b/src/main.h @@ -1,6 +1,6 @@ // Copyright (c) 2009-2010 Satoshi Nakamoto // Copyright (c) 2009-2014 The Bitcoin developers -// Distributed under the MIT/X11 software license, see the accompanying +// Distributed under the MIT software license, see the accompanying // file COPYING or http://www.opensource.org/licenses/mit-license.php. #ifndef BITCOIN_MAIN_H @@ -60,7 +60,7 @@ static const unsigned int DEFAULT_BLOCK_PRIORITY_SIZE = 50000; static const unsigned int MAX_STANDARD_TX_SIZE = 100000; /** The maximum allowed number of signature check operations in a block (network rule) */ static const unsigned int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50; -/** Maxiumum number of signature check operations in an IsStandard() P2SH script */ +/** Maximum number of signature check operations in an IsStandard() P2SH script */ static const unsigned int MAX_P2SH_SIGOPS = 15; /** The maximum number of sigops we're willing to relay/mine in a single tx */ static const unsigned int MAX_TX_SIGOPS = MAX_BLOCK_SIGOPS/5; @@ -97,7 +97,7 @@ static const unsigned int BLOCK_DOWNLOAD_WINDOW = 1024; /** Time to wait (in seconds) between writing blockchain state to disk. */ static const unsigned int DATABASE_WRITE_INTERVAL = 3600; -/** "reject" message codes **/ +/** "reject" message codes */ static const unsigned char REJECT_MALFORMED = 0x01; static const unsigned char REJECT_INVALID = 0x10; static const unsigned char REJECT_OBSOLETE = 0x11; @@ -131,10 +131,10 @@ extern bool fIsBareMultisigStd; extern unsigned int nCoinCacheSize; extern CFeeRate minRelayTxFee; -// Best header we've seen so far (used for getheaders queries' starting points). +/** Best header we've seen so far (used for getheaders queries' starting points). */ extern CBlockIndex *pindexBestHeader; -// Minimum disk space required - used in CheckDiskSpace() +/** Minimum disk space required - used in CheckDiskSpace() */ static const uint64_t nMinDiskSpace = 52428800; /** Register a wallet to receive updates from core */ @@ -151,15 +151,17 @@ void RegisterNodeSignals(CNodeSignals& nodeSignals); /** Unregister a network node */ void UnregisterNodeSignals(CNodeSignals& nodeSignals); -/** Process an incoming block. This only returns after the best known valid - block is made active. Note that it does not, however, guarantee that the - specific block passed to it has been checked for validity! - @param[out] state This may be set to an Error state if any error occurred processing it, including during validation/connection/etc of otherwise unrelated blocks during reorganisation; or it may be set to an Invalid state iff pblock is itself invalid (but this is not guaranteed even when the block is checked). If you want to *possibly* get feedback on whether pblock is valid, you must also install a CValidationInterface - this will have its BlockChecked method called whenever *any* block completes validation. - @param[in] pfrom The node which we are receiving the block from; it is added to mapBlockSource and may be penalised if the block is invalid. - @param[in] pblock The block we want to process. - @param[out] dbp If pblock is stored to disk (or already there), this will be set to its location. - @return True if state.IsValid() -*/ +/** + * Process an incoming block. This only returns after the best known valid + * block is made active. Note that it does not, however, guarantee that the + * specific block passed to it has been checked for validity! + * + * @param[out] state This may be set to an Error state if any error occurred processing it, including during validation/connection/etc of otherwise unrelated blocks during reorganisation; or it may be set to an Invalid state if pblock is itself invalid (but this is not guaranteed even when the block is checked). If you want to *possibly* get feedback on whether pblock is valid, you must also install a CValidationInterface - this will have its BlockChecked method called whenever *any* block completes validation. + * @param[in] pfrom The node which we are receiving the block from; it is added to mapBlockSource and may be penalised if the block is invalid. + * @param[in] pblock The block we want to process. + * @param[out] dbp If pblock is stored to disk (or already there), this will be set to its location. + * @return True if state.IsValid() + */ bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBlockPos *dbp = NULL); /** Check whether enough disk space is available for an incoming block */ bool CheckDiskSpace(uint64_t nAdditionalBytes = 0); @@ -245,54 +247,59 @@ struct CDiskTxPos : public CDiskBlockPos CAmount GetMinRelayFee(const CTransaction& tx, unsigned int nBytes, bool fAllowFree); -// -// Check transaction inputs, and make sure any -// pay-to-script-hash transactions are evaluating IsStandard scripts -// -// Why bother? To avoid denial-of-service attacks; an attacker -// can submit a standard HASH... OP_EQUAL transaction, -// which will get accepted into blocks. The redemption -// script can be anything; an attacker could use a very -// expensive-to-check-upon-redemption script like: -// DUP CHECKSIG DROP ... repeated 100 times... OP_1 -// +/** + * Check transaction inputs, and make sure any + * pay-to-script-hash transactions are evaluating IsStandard scripts + * + * Why bother? To avoid denial-of-service attacks; an attacker + * can submit a standard HASH... OP_EQUAL transaction, + * which will get accepted into blocks. The redemption + * script can be anything; an attacker could use a very + * expensive-to-check-upon-redemption script like: + * DUP CHECKSIG DROP ... repeated 100 times... OP_1 + */ -/** Check for standard transaction types - @param[in] mapInputs Map of previous transactions that have outputs we're spending - @return True if all inputs (scriptSigs) use only standard transaction forms -*/ +/** + * Check for standard transaction types + * @param[in] mapInputs Map of previous transactions that have outputs we're spending + * @return True if all inputs (scriptSigs) use only standard transaction forms + */ bool AreInputsStandard(const CTransaction& tx, const CCoinsViewCache& mapInputs); -/** Count ECDSA signature operations the old-fashioned (pre-0.6) way - @return number of sigops this transaction's outputs will produce when spent - @see CTransaction::FetchInputs -*/ +/** + * Count ECDSA signature operations the old-fashioned (pre-0.6) way + * @return number of sigops this transaction's outputs will produce when spent + * @see CTransaction::FetchInputs + */ unsigned int GetLegacySigOpCount(const CTransaction& tx); -/** Count ECDSA signature operations in pay-to-script-hash inputs. - - @param[in] mapInputs Map of previous transactions that have outputs we're spending - @return maximum number of sigops required to validate this transaction's inputs - @see CTransaction::FetchInputs +/** + * Count ECDSA signature operations in pay-to-script-hash inputs. + * + * @param[in] mapInputs Map of previous transactions that have outputs we're spending + * @return maximum number of sigops required to validate this transaction's inputs + * @see CTransaction::FetchInputs */ unsigned int GetP2SHSigOpCount(const CTransaction& tx, const CCoinsViewCache& mapInputs); -// Check whether all inputs of this transaction are valid (no double spends, scripts & sigs, amounts) -// This does not modify the UTXO set. If pvChecks is not NULL, script checks are pushed onto it -// instead of being performed inline. +/** + * Check whether all inputs of this transaction are valid (no double spends, scripts & sigs, amounts) + * This does not modify the UTXO set. If pvChecks is not NULL, script checks are pushed onto it + * instead of being performed inline. + */ bool CheckInputs(const CTransaction& tx, CValidationState &state, const CCoinsViewCache &view, bool fScriptChecks, unsigned int flags, bool cacheStore, std::vector<CScriptCheck> *pvChecks = NULL); -// Apply the effects of this transaction on the UTXO set represented by view +/** Apply the effects of this transaction on the UTXO set represented by view */ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCache &inputs, CTxUndo &txundo, int nHeight); -// Context-independent validity checks +/** Context-independent validity checks */ bool CheckTransaction(const CTransaction& tx, CValidationState& state); /** Check for standard transaction types - @return True if all outputs (scriptPubKeys) use only standard transaction forms -*/ + * @return True if all outputs (scriptPubKeys) use only standard transaction forms + */ bool IsStandardTx(const CTransaction& tx, std::string& reason); bool IsFinalTx(const CTransaction &tx, int nBlockHeight = 0, int64_t nBlockTime = 0); @@ -315,8 +322,10 @@ public: }; -/** Closure representing one script verification - * Note that this stores references to the spending transaction */ +/** + * Closure representing one script verification + * Note that this stores references to the spending transaction + */ class CScriptCheck { private: @@ -345,7 +354,7 @@ public: /** Data structure that represents a partial merkle tree. * - * It respresents a subset of the txid's of a known block, in a way that + * It represents a subset of the txid's of a known block, in a way that * allows recovery of the list of txid's and the merkle root, in an * authenticated way. * @@ -380,36 +389,38 @@ public: class CPartialMerkleTree { protected: - // the total number of transactions in the block + /** the total number of transactions in the block */ unsigned int nTransactions; - // node-is-parent-of-matched-txid bits + /** node-is-parent-of-matched-txid bits */ std::vector<bool> vBits; - // txids and internal hashes + /** txids and internal hashes */ std::vector<uint256> vHash; - // flag set when encountering invalid data + /** flag set when encountering invalid data */ bool fBad; - // helper function to efficiently calculate the number of nodes at given height in the merkle tree + /** helper function to efficiently calculate the number of nodes at given height in the merkle tree */ unsigned int CalcTreeWidth(int height) { return (nTransactions+(1 << height)-1) >> height; } - // calculate the hash of a node in the merkle tree (at leaf level: the txid's themself) + /** calculate the hash of a node in the merkle tree (at leaf level: the txid's themselves) */ uint256 CalcHash(int height, unsigned int pos, const std::vector<uint256> &vTxid); - // recursive function that traverses tree nodes, storing the data as bits and hashes + /** recursive function that traverses tree nodes, storing the data as bits and hashes */ void TraverseAndBuild(int height, unsigned int pos, const std::vector<uint256> &vTxid, const std::vector<bool> &vMatch); - // recursive function that traverses tree nodes, consuming the bits and hashes produced by TraverseAndBuild. - // it returns the hash of the respective node. + /** + * recursive function that traverses tree nodes, consuming the bits and hashes produced by TraverseAndBuild. + * it returns the hash of the respective node. + */ uint256 TraverseAndExtract(int height, unsigned int pos, unsigned int &nBitsUsed, unsigned int &nHashUsed, std::vector<uint256> &vMatch); public: - // serialization implementation + /** serialization implementation */ ADD_SERIALIZE_METHODS; template <typename Stream, typename Operation> @@ -432,13 +443,15 @@ public: } } - // Construct a partial merkle tree from a list of transaction id's, and a mask that selects a subset of them + /** Construct a partial merkle tree from a list of transaction id's, and a mask that selects a subset of them */ CPartialMerkleTree(const std::vector<uint256> &vTxid, const std::vector<bool> &vMatch); CPartialMerkleTree(); - // extract the matching txid's represented by this partial merkle tree. - // returns the merkle root, or 0 in case of failure + /** + * extract the matching txid's represented by this partial merkle tree. + * returns the merkle root, or 0 in case of failure + */ uint256 ExtractMatches(std::vector<uint256> &vMatch); }; @@ -458,22 +471,21 @@ bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex); * of problems. Note that in any case, coins may be modified. */ bool DisconnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& coins, bool* pfClean = NULL); -// Apply the effects of this block (with given index) on the UTXO set represented by coins +/** Apply the effects of this block (with given index) on the UTXO set represented by coins */ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pindex, CCoinsViewCache& coins, bool fJustCheck = false); -// Context-independent validity checks +/** Context-independent validity checks */ bool CheckBlockHeader(const CBlockHeader& block, CValidationState& state, bool fCheckPOW = true); bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW = true, bool fCheckMerkleRoot = true); -// Context-dependent validity checks +/** Context-dependent validity checks */ bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex *pindexPrev); bool ContextualCheckBlock(const CBlock& block, CValidationState& state, CBlockIndex *pindexPrev); -// Check a block is completely valid from start to finish (only works on top of our current best block, with cs_main held) +/** Check a block is completely valid from start to finish (only works on top of our current best block, with cs_main held) */ bool TestBlockValidity(CValidationState &state, const CBlock& block, CBlockIndex *pindexPrev, bool fCheckPOW = true, bool fCheckMerkleRoot = true); -// Store block on disk -// if dbp is provided, the file is known to already reside on disk +/** Store block on disk. If dbp is provided, the file is known to already reside on disk */ bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex **pindex, CDiskBlockPos* dbp = NULL); bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex **ppindex= NULL); @@ -482,13 +494,13 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc class CBlockFileInfo { public: - unsigned int nBlocks; // number of blocks stored in file - unsigned int nSize; // number of used bytes of block file - unsigned int nUndoSize; // number of used bytes in the undo file - unsigned int nHeightFirst; // lowest height of block in file - unsigned int nHeightLast; // highest height of block in file - uint64_t nTimeFirst; // earliest time of block in file - uint64_t nTimeLast; // latest time of block in file + unsigned int nBlocks; //! number of blocks stored in file + unsigned int nSize; //! number of used bytes of block file + unsigned int nUndoSize; //! number of used bytes in the undo file + unsigned int nHeightFirst; //! lowest height of block in file + unsigned int nHeightLast; //! highest height of block in file + uint64_t nTimeFirst; //! earliest time of block in file + uint64_t nTimeLast; //! latest time of block in file ADD_SERIALIZE_METHODS; @@ -519,7 +531,7 @@ public: std::string ToString() const; - // update statistics (does not update nSize) + /** update statistics (does not update nSize) */ void AddBlock(unsigned int nHeightIn, uint64_t nTimeIn) { if (nBlocks==0 || nHeightFirst > nHeightIn) nHeightFirst = nHeightIn; @@ -537,9 +549,9 @@ public: class CValidationState { private: enum mode_state { - MODE_VALID, // everything ok - MODE_INVALID, // network rule violation (DoS value may be set) - MODE_ERROR, // run-time error + MODE_VALID, //! everything ok + MODE_INVALID, //! network rule violation (DoS value may be set) + MODE_ERROR, //! run-time error } mode; int nDoS; std::string strRejectReason; @@ -634,24 +646,26 @@ struct CBlockTemplate -/** Used to relay blocks as header + vector<merkle branch> +/** + * Used to relay blocks as header + vector<merkle branch> * to filtered nodes. */ class CMerkleBlock { public: - // Public only for unit testing + /** Public only for unit testing */ CBlockHeader header; CPartialMerkleTree txn; public: - // Public only for unit testing and relay testing - // (not relayed) + /** Public only for unit testing and relay testing (not relayed) */ std::vector<std::pair<unsigned int, uint256> > vMatchedTxn; - // Create from a CBlock, filtering transactions according to filter - // Note that this will call IsRelevantAndUpdate on the filter for each transaction, - // thus the filter will likely be modified. + /** + * Create from a CBlock, filtering transactions according to filter + * Note that this will call IsRelevantAndUpdate on the filter for each transaction, + * thus the filter will likely be modified. + */ CMerkleBlock(const CBlock& block, CBloomFilter& filter); ADD_SERIALIZE_METHODS; |