mirror of
https://github.com/XRPLF/rippled.git
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521 lines
17 KiB
C++
521 lines
17 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of rippled: https://github.com/ripple/rippled
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Copyright (c) 2012, 2013 Ripple Labs Inc.
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#ifndef RIPPLE_LEDGER_H
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#define RIPPLE_LEDGER_H
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class Job;
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enum LedgerStateParms
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{
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lepNONE = 0, // no special flags
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// input flags
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lepCREATE = 1, // Create if not present
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// output flags
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lepOKAY = 2, // success
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lepMISSING = 4, // No node in that slot
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lepWRONGTYPE = 8, // Node of different type there
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lepCREATED = 16, // Node was created
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lepERROR = 32, // error
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};
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#define LEDGER_JSON_DUMP_TXRP 0x10000000
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#define LEDGER_JSON_DUMP_STATE 0x20000000
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#define LEDGER_JSON_EXPAND 0x40000000
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#define LEDGER_JSON_FULL 0x80000000
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class SqliteStatement;
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class LedgerBase
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{
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protected:
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LedgerBase ();
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// VFALCO TODO eliminate the need for friends
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friend class TransactionEngine;
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friend class Transactor;
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typedef RippleRecursiveMutex LockType;
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typedef LockType::ScopedLockType ScopedLockType;
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LockType mLock;
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};
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// VFALCO TODO figure out exactly how this thing works.
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// It seems like some ledger database is stored as a global, static in the
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// class. But then what is the meaning of a Ledger object? Is this
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// really two classes in one? StoreOfAllLedgers + SingleLedgerObject?
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//
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class Ledger
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: public boost::enable_shared_from_this <Ledger>
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, public LedgerBase
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, public CountedObject <Ledger>
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, public Uncopyable
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{
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public:
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static char const* getCountedObjectName () { return "Ledger"; }
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typedef boost::shared_ptr<Ledger> pointer;
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typedef const boost::shared_ptr<Ledger>& ref;
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enum TransResult
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{
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TR_ERROR = -1,
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TR_SUCCESS = 0,
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TR_NOTFOUND = 1,
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TR_ALREADY = 2,
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TR_BADTRANS = 3, // the transaction itself is corrupt
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TR_BADACCT = 4, // one of the accounts is invalid
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TR_INSUFF = 5, // the sending(apply)/receiving(remove) account is broke
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TR_PASTASEQ = 6, // account is past this transaction
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TR_PREASEQ = 7, // account is missing transactions before this
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TR_BADLSEQ = 8, // ledger too early
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TR_TOOSMALL = 9, // amount is less than Tx fee
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};
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// ledger close flags
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static const uint32 sLCF_NoConsensusTime = 1;
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public:
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Ledger (const RippleAddress & masterID, uint64 startAmount); // used for the starting bootstrap ledger
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Ledger (uint256 const & parentHash, uint256 const & transHash, uint256 const & accountHash,
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uint64 totCoins, uint32 closeTime, uint32 parentCloseTime, int closeFlags, int closeResolution,
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uint32 ledgerSeq, bool & loaded); // used for database ledgers
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Ledger (Blob const & rawLedger, bool hasPrefix);
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Ledger (const std::string & rawLedger, bool hasPrefix);
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Ledger (bool dummy, Ledger & previous); // ledger after this one
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Ledger (Ledger & target, bool isMutable); // snapshot
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~Ledger ();
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static Ledger::pointer getSQL (const std::string & sqlStatement);
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static Ledger::pointer getSQL1 (SqliteStatement*);
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static void getSQL2 (Ledger::ref);
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static Ledger::pointer getLastFullLedger ();
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static uint32 roundCloseTime (uint32 closeTime, uint32 closeResolution);
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void updateHash ();
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void setClosed ()
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{
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mClosed = true;
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}
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void setValidated()
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{
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mValidated = true;
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}
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void setAccepted (uint32 closeTime, int closeResolution, bool correctCloseTime);
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void setAccepted ();
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void setImmutable ();
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bool isClosed ()
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{
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return mClosed;
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}
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bool isAccepted ()
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{
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return mAccepted;
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}
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bool isValidated ()
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{
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return mValidated;
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}
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bool isImmutable ()
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{
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return mImmutable;
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}
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bool isFixed ()
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{
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return mClosed || mImmutable;
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}
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void setFull ()
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{
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mTransactionMap->setLedgerSeq (mLedgerSeq);
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mAccountStateMap->setLedgerSeq (mLedgerSeq);
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}
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// ledger signature operations
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void addRaw (Serializer & s) const;
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void setRaw (Serializer & s, bool hasPrefix);
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uint256 getHash ();
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uint256 const& getParentHash () const
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{
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return mParentHash;
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}
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uint256 const& getTransHash () const
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{
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return mTransHash;
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}
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uint256 const& getAccountHash () const
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{
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return mAccountHash;
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}
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uint64 getTotalCoins () const
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{
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return mTotCoins;
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}
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void destroyCoins (uint64 fee)
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{
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mTotCoins -= fee;
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}
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uint32 getCloseTimeNC () const
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{
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return mCloseTime;
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}
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uint32 getParentCloseTimeNC () const
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{
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return mParentCloseTime;
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}
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uint32 getLedgerSeq () const
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{
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return mLedgerSeq;
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}
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int getCloseResolution () const
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{
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return mCloseResolution;
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}
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bool getCloseAgree () const
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{
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return (mCloseFlags & sLCF_NoConsensusTime) == 0;
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}
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// close time functions
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void setCloseTime (uint32 ct)
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{
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assert (!mImmutable);
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mCloseTime = ct;
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}
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void setCloseTime (boost::posix_time::ptime);
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boost::posix_time::ptime getCloseTime () const;
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// low level functions
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SHAMap::ref peekTransactionMap ()
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{
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return mTransactionMap;
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}
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SHAMap::ref peekAccountStateMap ()
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{
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return mAccountStateMap;
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}
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void dropCache ()
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{
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assert (isImmutable ());
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if (mTransactionMap)
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mTransactionMap->dropCache ();
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if (mAccountStateMap)
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mAccountStateMap->dropCache ();
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}
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// ledger sync functions
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void setAcquiring (void);
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bool isAcquiring (void);
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bool isAcquiringTx (void);
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bool isAcquiringAS (void);
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// Transaction Functions
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bool addTransaction (uint256 const & id, const Serializer & txn);
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bool addTransaction (uint256 const & id, const Serializer & txn, const Serializer & metaData);
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bool hasTransaction (uint256 const & TransID) const
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{
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return mTransactionMap->hasItem (TransID);
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}
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Transaction::pointer getTransaction (uint256 const & transID) const;
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bool getTransaction (uint256 const & transID, Transaction::pointer & txn, TransactionMetaSet::pointer & txMeta);
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bool getTransactionMeta (uint256 const & transID, TransactionMetaSet::pointer & txMeta);
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bool getMetaHex (uint256 const & transID, std::string & hex);
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static SerializedTransaction::pointer getSTransaction (SHAMapItem::ref, SHAMapTreeNode::TNType);
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SerializedTransaction::pointer getSMTransaction (SHAMapItem::ref, SHAMapTreeNode::TNType,
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TransactionMetaSet::pointer & txMeta);
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// high-level functions
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bool hasAccount (const RippleAddress & acctID);
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AccountState::pointer getAccountState (const RippleAddress & acctID);
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LedgerStateParms writeBack (LedgerStateParms parms, SLE::ref);
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SLE::pointer getAccountRoot (const uint160 & accountID);
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SLE::pointer getAccountRoot (const RippleAddress & naAccountID);
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void updateSkipList ();
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void visitAccountItems (const uint160 & acctID, FUNCTION_TYPE<void (SLE::ref)>);
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void visitStateItems (FUNCTION_TYPE<void (SLE::ref)>);
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// database functions (low-level)
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static Ledger::pointer loadByIndex (uint32 ledgerIndex);
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static Ledger::pointer loadByHash (uint256 const & ledgerHash);
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static uint256 getHashByIndex (uint32 index);
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static bool getHashesByIndex (uint32 index, uint256 & ledgerHash, uint256 & parentHash);
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static std::map< uint32, std::pair<uint256, uint256> > getHashesByIndex (uint32 minSeq, uint32 maxSeq);
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bool pendSaveValidated (bool isSynchronous, bool isCurrent);
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// next/prev function
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SLE::pointer getSLE (uint256 const & uHash); // SLE is mutable
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SLE::pointer getSLEi (uint256 const & uHash); // SLE is immutable
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// VFALCO NOTE These seem to let you walk the list of ledgers
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//
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uint256 getFirstLedgerIndex ();
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uint256 getLastLedgerIndex ();
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uint256 getNextLedgerIndex (uint256 const & uHash); // first node >hash
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uint256 getNextLedgerIndex (uint256 const & uHash, uint256 const & uEnd); // first node >hash, <end
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uint256 getPrevLedgerIndex (uint256 const & uHash); // last node <hash
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uint256 getPrevLedgerIndex (uint256 const & uHash, uint256 const & uBegin); // last node <hash, >begin
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// Ledger hash table function
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static uint256 getLedgerHashIndex ();
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static uint256 getLedgerHashIndex (uint32 desiredLedgerIndex);
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static int getLedgerHashOffset (uint32 desiredLedgerIndex);
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static int getLedgerHashOffset (uint32 desiredLedgerIndex, uint32 currentLedgerIndex);
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uint256 getLedgerHash (uint32 ledgerIndex);
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std::vector< std::pair<uint32, uint256> > getLedgerHashes ();
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static uint256 getLedgerFeatureIndex ();
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static uint256 getLedgerFeeIndex ();
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std::vector<uint256> getLedgerFeatures ();
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std::vector<uint256> getNeededTransactionHashes (int max, SHAMapSyncFilter * filter);
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std::vector<uint256> getNeededAccountStateHashes (int max, SHAMapSyncFilter * filter);
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// index calculation functions
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static uint256 getAccountRootIndex (const uint160 & uAccountID);
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static uint256 getAccountRootIndex (const RippleAddress & account)
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{
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return getAccountRootIndex (account.getAccountID ());
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}
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//
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// Generator Map functions
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//
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SLE::pointer getGenerator (const uint160 & uGeneratorID);
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static uint256 getGeneratorIndex (const uint160 & uGeneratorID);
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//
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// Nickname functions
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//
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static uint256 getNicknameHash (const std::string & strNickname)
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{
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Serializer s (strNickname);
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return s.getSHA256 ();
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}
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NicknameState::pointer getNicknameState (uint256 const & uNickname);
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NicknameState::pointer getNicknameState (const std::string & strNickname)
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{
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return getNicknameState (getNicknameHash (strNickname));
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}
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SLE::pointer getNickname (uint256 const & uNickname);
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SLE::pointer getNickname (const std::string & strNickname)
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{
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return getNickname (getNicknameHash (strNickname));
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}
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static uint256 getNicknameIndex (uint256 const & uNickname);
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//
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// Order book functions
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//
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// Order book dirs have a base so we can use next to step through them in quality order.
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static bool isValidBook (const uint160 & uTakerPaysCurrency, const uint160 & uTakerPaysIssuerID,
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const uint160 & uTakerGetsCurrency, const uint160 & uTakerGetsIssuerID);
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static uint256 getBookBase (const uint160 & uTakerPaysCurrency, const uint160 & uTakerPaysIssuerID,
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const uint160 & uTakerGetsCurrency, const uint160 & uTakerGetsIssuerID);
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//
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// Offer functions
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//
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SLE::pointer getOffer (uint256 const & uIndex);
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SLE::pointer getOffer (const uint160 & uAccountID, uint32 uSequence)
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{
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return getOffer (getOfferIndex (uAccountID, uSequence));
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}
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// The index of an offer.
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static uint256 getOfferIndex (const uint160 & uAccountID, uint32 uSequence);
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//
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// Owner functions
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//
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// VFALCO NOTE This is a simple math operation that converts the account ID
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// into a 256 bit object (I think....need to research this)
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//
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// All items controlled by an account are here: offers
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static uint256 getOwnerDirIndex (const uint160 & uAccountID);
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//
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// Directory functions
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// Directories are doubly linked lists of nodes.
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// Given a directory root and and index compute the index of a node.
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static uint256 getDirNodeIndex (uint256 const & uDirRoot, const uint64 uNodeIndex = 0);
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static void ownerDirDescriber (SLE::ref, bool, const uint160 & owner);
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// Return a node: root or normal
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SLE::pointer getDirNode (uint256 const & uNodeIndex);
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//
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// Quality
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//
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static uint256 getQualityIndex (uint256 const & uBase, const uint64 uNodeDir = 0);
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static uint256 getQualityNext (uint256 const & uBase);
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static uint64 getQuality (uint256 const & uBase);
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static void qualityDirDescriber (SLE::ref, bool,
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const uint160 & uTakerPaysCurrency, const uint160 & uTakerPaysIssuer,
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const uint160 & uTakerGetsCurrency, const uint160 & uTakerGetsIssuer,
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const uint64 & uRate);
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//
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// Ripple functions : credit lines
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//
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// Index of node which is the ripple state between two accounts for a currency.
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// VFALCO NOTE Rename these to make it clear they are simple functions that
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// don't access global variables. e.g. "calculateKeyFromRippleStateAndAddress"
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//
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static uint256 getRippleStateIndex (const RippleAddress & naA, const RippleAddress & naB, const uint160 & uCurrency);
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static uint256 getRippleStateIndex (const uint160 & uiA, const uint160 & uiB, const uint160 & uCurrency)
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{
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return getRippleStateIndex (RippleAddress::createAccountID (uiA), RippleAddress::createAccountID (uiB), uCurrency);
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}
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SLE::pointer getRippleState (uint256 const & uNode);
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SLE::pointer getRippleState (const RippleAddress & naA, const RippleAddress & naB, const uint160 & uCurrency)
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{
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return getRippleState (getRippleStateIndex (naA, naB, uCurrency));
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}
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SLE::pointer getRippleState (const uint160 & uiA, const uint160 & uiB, const uint160 & uCurrency)
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{
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return getRippleState (getRippleStateIndex (RippleAddress::createAccountID (uiA), RippleAddress::createAccountID (uiB), uCurrency));
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}
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uint32 getReferenceFeeUnits ()
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{
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if (!mBaseFee) updateFees ();
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return mReferenceFeeUnits;
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}
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uint64 getBaseFee ()
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{
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if (!mBaseFee) updateFees ();
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return mBaseFee;
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}
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uint64 getReserve (int increments)
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{
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if (!mBaseFee) updateFees ();
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return scaleFeeBase (static_cast<uint64> (increments) * mReserveIncrement + mReserveBase);
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}
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uint64 getReserveInc ()
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{
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if (!mBaseFee) updateFees ();
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return mReserveIncrement;
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}
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uint64 scaleFeeBase (uint64 fee);
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uint64 scaleFeeLoad (uint64 fee, bool bAdmin);
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static std::set<uint32> getPendingSaves();
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Json::Value getJson (int options);
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void addJson (Json::Value&, int options);
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bool walkLedger ();
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bool assertSane ();
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protected:
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SLE::pointer getASNode (LedgerStateParms & parms, uint256 const & nodeID, LedgerEntryType let);
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// returned SLE is immutable
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SLE::pointer getASNodeI (uint256 const & nodeID, LedgerEntryType let);
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void saveValidatedLedgerAsync(Job&, bool current)
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{
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saveValidatedLedger(current);
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}
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void saveValidatedLedger (bool current);
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void updateFees ();
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private:
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void initializeFees ();
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private:
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// The basic Ledger structure, can be opened, closed, or synching
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uint256 mHash;
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uint256 mParentHash;
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uint256 mTransHash;
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uint256 mAccountHash;
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uint64 mTotCoins;
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uint32 mLedgerSeq;
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uint32 mCloseTime; // when this ledger closed
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uint32 mParentCloseTime; // when the previous ledger closed
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int mCloseResolution; // the resolution for this ledger close time (2-120 seconds)
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uint32 mCloseFlags; // flags indicating how this ledger close took place
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bool mClosed, mValidated, mValidHash, mAccepted, mImmutable;
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uint32 mReferenceFeeUnits; // Fee units for the reference transaction
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uint32 mReserveBase, mReserveIncrement; // Reserve basse and increment in fee units
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uint64 mBaseFee; // Ripple cost of the reference transaction
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SHAMap::pointer mTransactionMap;
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SHAMap::pointer mAccountStateMap;
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typedef RippleMutex StaticLockType;
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typedef StaticLockType::ScopedLockType StaticScopedLockType;
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// ledgers not fully saved, validated ledger present but DB may not be correct yet
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static StaticLockType sPendingSaveLock;
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static std::set<uint32> sPendingSaves;
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};
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inline LedgerStateParms operator| (const LedgerStateParms& l1, const LedgerStateParms& l2)
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{
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return static_cast<LedgerStateParms> (static_cast<int> (l1) | static_cast<int> (l2));
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}
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inline LedgerStateParms operator& (const LedgerStateParms& l1, const LedgerStateParms& l2)
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{
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return static_cast<LedgerStateParms> (static_cast<int> (l1) & static_cast<int> (l2));
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}
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#endif
|