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f4e6a72e1c
This code does not assume the new previous ledger is valid or trusted. 1) Validate sequence numbers and basic information. 2) Create a new ledger based on the new previous ledger. 3) Compare the old previous ledger and the new previous ledger. 4) Try to include any missing, valid transactions in the current ledger. 5) Traverse the old ledger based on the old previous ledger, try to import any transactions into the new ledger.
116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
#ifndef __LEDGER__
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#define __LEDGER__
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#include <map>
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#include <list>
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#include <boost/shared_ptr.hpp>
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#include <boost/enable_shared_from_this.hpp>
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#include "json/value.h"
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#include "Transaction.h"
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#include "types.h"
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#include "BitcoinUtil.h"
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#include "Hanko.h"
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#include "AccountState.h"
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#include "SHAMap.h"
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class Ledger : public boost::enable_shared_from_this<Ledger>
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{ // The basic Ledger structure, can be opened, closed, or synching
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public:
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typedef boost::shared_ptr<Ledger> pointer;
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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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private:
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uint256 mHash, mParentHash, mTransHash, mAccountHash;
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uint64 mFeeHeld, mTimeStamp;
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uint32 mLedgerSeq;
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bool mClosed, mValidHash, mAccepted;
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SHAMap::pointer mTransactionMap, mAccountStateMap;
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mutable boost::recursive_mutex mLock;
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Ledger(const Ledger&); // no implementation
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Ledger& operator=(const Ledger&); // no implementation
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protected:
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Ledger(Ledger&, uint64 timestamp); // ledger after this one
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void updateHash();
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bool addAccountState(AccountState::pointer);
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bool updateAccountState(AccountState::pointer);
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bool addTransaction(Transaction::pointer);
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bool delTransaction(const uint256& id);
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static Ledger::pointer getSQL(const std::string& sqlStatement);
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public:
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Ledger(const uint160& masterID, uint64 startAmount); // used for the starting bootstrap ledger
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Ledger(const uint256 &parentHash, const uint256 &transHash, const uint256 &accountHash,
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uint64 feeHeld, uint64 timeStamp, uint32 ledgerSeq); // used for received ledgers
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void setClosed() { mClosed=true; }
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void setAccepted() { mAccepted=true; }
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bool isClosed() { return mClosed; }
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bool isAccepted() { return mAccepted; }
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// ledger signature operations
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void addRaw(Serializer &s);
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uint256 getHash();
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const uint256& getParentHash() const { return mParentHash; }
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const uint256& getTransHash() const { return mTransHash; }
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const uint256& getAccountHash() const { return mAccountHash; }
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uint64 getFeeHeld() const { return mFeeHeld; }
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uint64 getTimeStamp() const { return mTimeStamp; }
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uint32 getLedgerSeq() const { return mLedgerSeq; }
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// low level functions
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SHAMap::pointer peekTransactionMap() { return mTransactionMap; }
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SHAMap::pointer peekAccountStateMap() { return mAccountStateMap; }
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// mid level functions
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AccountState::pointer getAccountState(const uint160& acctID);
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Transaction::pointer getTransaction(const uint256& transID);
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uint64 getBalance(const uint160& acctID);
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// high level functions
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TransResult applyTransaction(Transaction::pointer trans);
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TransResult removeTransaction(Transaction::pointer trans);
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TransResult hasTransaction(Transaction::pointer trans);
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Ledger::pointer switchPreviousLedger(Ledger::pointer oldPrevious, Ledger::pointer newPrevious, int limit);
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// database functions
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static void saveAcceptedLedger(Ledger::pointer);
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static Ledger::pointer loadByIndex(uint32 ledgerIndex);
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static Ledger::pointer loadByHash(const uint256& ledgerHash);
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Ledger::pointer closeLedger(uint64 timestamp);
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bool isCompatible(boost::shared_ptr<Ledger> other);
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bool signLedger(std::vector<unsigned char> &signature, const LocalHanko &hanko);
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void addJson(Json::Value&);
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static bool unitTest();
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};
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#endif
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