main.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Distributed under the MIT/X11 software license, see the accompanying
   3 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   4
   5 class COutPoint;
   6 class CInPoint;
   7 class CDiskTxPos;
   8 class CCoinBase;
   9 class CTxIn;
  10 class CTxOut;
  11 class CTransaction;
  12 class CBlock;
  13 class CBlockIndex;
  14 class CWalletTx;
  15 class CKeyItem;
  16
  17 static const unsigned int MAX_BLOCK_SIZE = 1000000;
  18 static const unsigned int MAX_BLOCK_SIZE_GEN = MAX_BLOCK_SIZE/2;
  19 static const int MAX_BLOCK_SIGOPS = MAX_BLOCK_SIZE/50;
  20 static const int64 COIN = 100000000;
  21 static const int64 CENT = 1000000;
  22 static const int64 MAX_MONEY = 21000000 * COIN;
  23 inline bool MoneyRange(int64 nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); }
  24 static const int COINBASE_MATURITY = 100;
  25 static const CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
  26
  27
  28
  29
  30
  31
  32 extern CCriticalSection cs_main;
  33 extern map<uint256, CBlockIndex*> mapBlockIndex;
  34 extern const uint256 hashGenesisBlock;
  35 extern CBlockIndex* pindexGenesisBlock;
  36 extern int nBestHeight;
  37 extern CBigNum bnBestChainWork;
  38 extern CBigNum bnBestInvalidWork;
  39 extern uint256 hashBestChain;
  40 extern CBlockIndex* pindexBest;
  41 extern unsigned int nTransactionsUpdated;
  42 extern map<uint256, int> mapRequestCount;
  43 extern CCriticalSection cs_mapRequestCount;
  44 extern map<string, string> mapAddressBook;
  45 extern CCriticalSection cs_mapAddressBook;
  46 extern vector<unsigned char> vchDefaultKey;
  47 extern double dHashesPerSec;
  48 extern int64 nHPSTimerStart;
  49
  50 // Settings
  51 extern int fGenerateBitcoins;
  52 extern int64 nTransactionFee;
  53 extern CAddress addrIncoming;
  54 extern int fLimitProcessors;
  55 extern int nLimitProcessors;
  56 extern int fMinimizeToTray;
  57 extern int fMinimizeOnClose;
  58
  59
  60
  61
  62
  63
  64
  65 bool CheckDiskSpace(uint64 nAdditionalBytes=0);
  66 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode="rb");
  67 FILE* AppendBlockFile(unsigned int& nFileRet);
  68 bool AddKey(const CKey& key);
  69 vector<unsigned char> GenerateNewKey();
  70 bool AddToWallet(const CWalletTx& wtxIn);
  71 void WalletUpdateSpent(const COutPoint& prevout);
  72 void ReacceptWalletTransactions();
  73 bool LoadBlockIndex(bool fAllowNew=true);
  74 void PrintBlockTree();
  75 bool ProcessMessages(CNode* pfrom);
  76 bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv);
  77 bool SendMessages(CNode* pto, bool fSendTrickle);
  78 int64 GetBalance();
  79 bool CreateTransaction(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, CKey& keyRet, int64& nFeeRequiredRet);
  80 bool CommitTransaction(CWalletTx& wtxNew, const CKey& key);
  81 bool BroadcastTransaction(CWalletTx& wtxNew);
  82 string SendMoney(CScript scriptPubKey, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);
  83 string SendMoneyToBitcoinAddress(string strAddress, int64 nValue, CWalletTx& wtxNew, bool fAskFee=false);
  84 void GenerateBitcoins(bool fGenerate);
  85 void ThreadBitcoinMiner(void* parg);
  86 void BitcoinMiner();
  87 bool CheckProofOfWork(uint256 hash, unsigned int nBits);
  88 bool IsInitialBlockDownload();
  89 string GetWarnings(string strFor);
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102 class CDiskTxPos
 103 {
 104 public:
 105     unsigned int nFile;
 106     unsigned int nBlockPos;
 107     unsigned int nTxPos;
 108
 109     CDiskTxPos()
 110     {
 111         SetNull();
 112     }
 113
 114     CDiskTxPos(unsigned int nFileIn, unsigned int nBlockPosIn, unsigned int nTxPosIn)
 115     {
 116         nFile = nFileIn;
 117         nBlockPos = nBlockPosIn;
 118         nTxPos = nTxPosIn;
 119     }
 120
 121     IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); )
 122     void SetNull() { nFile = -1; nBlockPos = 0; nTxPos = 0; }
 123     bool IsNull() const { return (nFile == -1); }
 124
 125     friend bool operator==(const CDiskTxPos& a, const CDiskTxPos& b)
 126     {
 127         return (a.nFile     == b.nFile &&
 128                 a.nBlockPos == b.nBlockPos &&
 129                 a.nTxPos    == b.nTxPos);
 130     }
 131
 132     friend bool operator!=(const CDiskTxPos& a, const CDiskTxPos& b)
 133     {
 134         return !(a == b);
 135     }
 136
 137     string ToString() const
 138     {
 139         if (IsNull())
 140             return strprintf("null");
 141         else
 142             return strprintf("(nFile=%d, nBlockPos=%d, nTxPos=%d)", nFile, nBlockPos, nTxPos);
 143     }
 144
 145     void print() const
 146     {
 147         printf("%s", ToString().c_str());
 148     }
 149 };
 150
 151
 152
 153
 154 class CInPoint
 155 {
 156 public:
 157     CTransaction* ptx;
 158     unsigned int n;
 159
 160     CInPoint() { SetNull(); }
 161     CInPoint(CTransaction* ptxIn, unsigned int nIn) { ptx = ptxIn; n = nIn; }
 162     void SetNull() { ptx = NULL; n = -1; }
 163     bool IsNull() const { return (ptx == NULL && n == -1); }
 164 };
 165
 166
 167
 168
 169 class COutPoint
 170 {
 171 public:
 172     uint256 hash;
 173     unsigned int n;
 174
 175     COutPoint() { SetNull(); }
 176     COutPoint(uint256 hashIn, unsigned int nIn) { hash = hashIn; n = nIn; }
 177     IMPLEMENT_SERIALIZE( READWRITE(FLATDATA(*this)); )
 178     void SetNull() { hash = 0; n = -1; }
 179     bool IsNull() const { return (hash == 0 && n == -1); }
 180
 181     friend bool operator<(const COutPoint& a, const COutPoint& b)
 182     {
 183         return (a.hash < b.hash || (a.hash == b.hash && a.n < b.n));
 184     }
 185
 186     friend bool operator==(const COutPoint& a, const COutPoint& b)
 187     {
 188         return (a.hash == b.hash && a.n == b.n);
 189     }
 190
 191     friend bool operator!=(const COutPoint& a, const COutPoint& b)
 192     {
 193         return !(a == b);
 194     }
 195
 196     string ToString() const
 197     {
 198         return strprintf("COutPoint(%s, %d)", hash.ToString().substr(0,6).c_str(), n);
 199     }
 200
 201     void print() const
 202     {
 203         printf("%s\n", ToString().c_str());
 204     }
 205 };
 206
 207
 208
 209
 210 //
 211 // An input of a transaction.  It contains the location of the previous
 212 // transaction's output that it claims and a signature that matches the
 213 // output's public key.
 214 //
 215 class CTxIn
 216 {
 217 public:
 218     COutPoint prevout;
 219     CScript scriptSig;
 220     unsigned int nSequence;
 221
 222     CTxIn()
 223     {
 224         nSequence = UINT_MAX;
 225     }
 226
 227     explicit CTxIn(COutPoint prevoutIn, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=UINT_MAX)
 228     {
 229         prevout = prevoutIn;
 230         scriptSig = scriptSigIn;
 231         nSequence = nSequenceIn;
 232     }
 233
 234     CTxIn(uint256 hashPrevTx, unsigned int nOut, CScript scriptSigIn=CScript(), unsigned int nSequenceIn=UINT_MAX)
 235     {
 236         prevout = COutPoint(hashPrevTx, nOut);
 237         scriptSig = scriptSigIn;
 238         nSequence = nSequenceIn;
 239     }
 240
 241     IMPLEMENT_SERIALIZE
 242     (
 243         READWRITE(prevout);
 244         READWRITE(scriptSig);
 245         READWRITE(nSequence);
 246     )
 247
 248     bool IsFinal() const
 249     {
 250         return (nSequence == UINT_MAX);
 251     }
 252
 253     friend bool operator==(const CTxIn& a, const CTxIn& b)
 254     {
 255         return (a.prevout   == b.prevout &&
 256                 a.scriptSig == b.scriptSig &&
 257                 a.nSequence == b.nSequence);
 258     }
 259
 260     friend bool operator!=(const CTxIn& a, const CTxIn& b)
 261     {
 262         return !(a == b);
 263     }
 264
 265     string ToString() const
 266     {
 267         string str;
 268         str += strprintf("CTxIn(");
 269         str += prevout.ToString();
 270         if (prevout.IsNull())
 271             str += strprintf(", coinbase %s", HexStr(scriptSig).c_str());
 272         else
 273             str += strprintf(", scriptSig=%s", scriptSig.ToString().substr(0,24).c_str());
 274         if (nSequence != UINT_MAX)
 275             str += strprintf(", nSequence=%u", nSequence);
 276         str += ")";
 277         return str;
 278     }
 279
 280     void print() const
 281     {
 282         printf("%s\n", ToString().c_str());
 283     }
 284
 285     bool IsMine() const;
 286     int64 GetDebit() const;
 287 };
 288
 289
 290
 291
 292 //
 293 // An output of a transaction.  It contains the public key that the next input
 294 // must be able to sign with to claim it.
 295 //
 296 class CTxOut
 297 {
 298 public:
 299     int64 nValue;
 300     CScript scriptPubKey;
 301
 302     CTxOut()
 303     {
 304         SetNull();
 305     }
 306
 307     CTxOut(int64 nValueIn, CScript scriptPubKeyIn)
 308     {
 309         nValue = nValueIn;
 310         scriptPubKey = scriptPubKeyIn;
 311     }
 312
 313     IMPLEMENT_SERIALIZE
 314     (
 315         READWRITE(nValue);
 316         READWRITE(scriptPubKey);
 317     )
 318
 319     void SetNull()
 320     {
 321         nValue = -1;
 322         scriptPubKey.clear();
 323     }
 324
 325     bool IsNull()
 326     {
 327         return (nValue == -1);
 328     }
 329
 330     uint256 GetHash() const
 331     {
 332         return SerializeHash(*this);
 333     }
 334
 335     bool IsMine() const
 336     {
 337         return ::IsMine(scriptPubKey);
 338     }
 339
 340     int64 GetCredit() const
 341     {
 342         if (!MoneyRange(nValue))
 343             throw runtime_error("CTxOut::GetCredit() : value out of range");
 344         if (IsMine())
 345             return nValue;
 346         return 0;
 347     }
 348
 349     friend bool operator==(const CTxOut& a, const CTxOut& b)
 350     {
 351         return (a.nValue       == b.nValue &&
 352                 a.scriptPubKey == b.scriptPubKey);
 353     }
 354
 355     friend bool operator!=(const CTxOut& a, const CTxOut& b)
 356     {
 357         return !(a == b);
 358     }
 359
 360     string ToString() const
 361     {
 362         if (scriptPubKey.size() < 6)
 363             return "CTxOut(error)";
 364         return strprintf("CTxOut(nValue=%"PRI64d".%08"PRI64d", scriptPubKey=%s)", nValue / COIN, nValue % COIN, scriptPubKey.ToString().substr(0,24).c_str());
 365     }
 366
 367     void print() const
 368     {
 369         printf("%s\n", ToString().c_str());
 370     }
 371 };
 372
 373
 374
 375
 376 //
 377 // The basic transaction that is broadcasted on the network and contained in
 378 // blocks.  A transaction can contain multiple inputs and outputs.
 379 //
 380 class CTransaction
 381 {
 382 public:
 383     int nVersion;
 384     vector<CTxIn> vin;
 385     vector<CTxOut> vout;
 386     unsigned int nLockTime;
 387
 388
 389     CTransaction()
 390     {
 391         SetNull();
 392     }
 393
 394     IMPLEMENT_SERIALIZE
 395     (
 396         READWRITE(this->nVersion);
 397         nVersion = this->nVersion;
 398         READWRITE(vin);
 399         READWRITE(vout);
 400         READWRITE(nLockTime);
 401     )
 402
 403     void SetNull()
 404     {
 405         nVersion = 1;
 406         vin.clear();
 407         vout.clear();
 408         nLockTime = 0;
 409     }
 410
 411     bool IsNull() const
 412     {
 413         return (vin.empty() && vout.empty());
 414     }
 415
 416     uint256 GetHash() const
 417     {
 418         return SerializeHash(*this);
 419     }
 420
 421     bool IsFinal(int nBlockHeight=0, int64 nBlockTime=0) const
 422     {
 423         // Time based nLockTime implemented in 0.1.6
 424         if (nLockTime == 0)
 425             return true;
 426         if (nBlockHeight == 0)
 427             nBlockHeight = nBestHeight;
 428         if (nBlockTime == 0)
 429             nBlockTime = GetAdjustedTime();
 430         if ((int64)nLockTime < (nLockTime < 500000000 ? (int64)nBlockHeight : nBlockTime))
 431             return true;
 432         foreach(const CTxIn& txin, vin)
 433             if (!txin.IsFinal())
 434                 return false;
 435         return true;
 436     }
 437
 438     bool IsNewerThan(const CTransaction& old) const
 439     {
 440         if (vin.size() != old.vin.size())
 441             return false;
 442         for (int i = 0; i < vin.size(); i++)
 443             if (vin[i].prevout != old.vin[i].prevout)
 444                 return false;
 445
 446         bool fNewer = false;
 447         unsigned int nLowest = UINT_MAX;
 448         for (int i = 0; i < vin.size(); i++)
 449         {
 450             if (vin[i].nSequence != old.vin[i].nSequence)
 451             {
 452                 if (vin[i].nSequence <= nLowest)
 453                 {
 454                     fNewer = false;
 455                     nLowest = vin[i].nSequence;
 456                 }
 457                 if (old.vin[i].nSequence < nLowest)
 458                 {
 459                     fNewer = true;
 460                     nLowest = old.vin[i].nSequence;
 461                 }
 462             }
 463         }
 464         return fNewer;
 465     }
 466
 467     bool IsCoinBase() const
 468     {
 469         return (vin.size() == 1 && vin[0].prevout.IsNull());
 470     }
 471
 472     bool CheckTransaction() const
 473     {
 474         // Basic checks that don't depend on any context
 475         if (vin.empty() || vout.empty())
 476             return error("CTransaction::CheckTransaction() : vin or vout empty");
 477
 478         // Size limits
 479         if (::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
 480             return error("CTransaction::CheckTransaction() : size limits failed");
 481
 482         // Check for negative or overflow output values
 483         int64 nValueOut = 0;
 484         foreach(const CTxOut& txout, vout)
 485         {
 486             if (txout.nValue < 0)
 487                 return error("CTransaction::CheckTransaction() : txout.nValue negative");
 488             if (txout.nValue > MAX_MONEY)
 489                 return error("CTransaction::CheckTransaction() : txout.nValue too high");
 490             nValueOut += txout.nValue;
 491             if (!MoneyRange(nValueOut))
 492                 return error("CTransaction::CheckTransaction() : txout total out of range");
 493         }
 494
 495         if (IsCoinBase())
 496         {
 497             if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
 498                 return error("CTransaction::CheckTransaction() : coinbase script size");
 499         }
 500         else
 501         {
 502             foreach(const CTxIn& txin, vin)
 503                 if (txin.prevout.IsNull())
 504                     return error("CTransaction::CheckTransaction() : prevout is null");
 505         }
 506
 507         return true;
 508     }
 509
 510     int GetSigOpCount() const
 511     {
 512         int n = 0;
 513         foreach(const CTxIn& txin, vin)
 514             n += txin.scriptSig.GetSigOpCount();
 515         foreach(const CTxOut& txout, vout)
 516             n += txout.scriptPubKey.GetSigOpCount();
 517         return n;
 518     }
 519
 520     bool IsMine() const
 521     {
 522         foreach(const CTxOut& txout, vout)
 523             if (txout.IsMine())
 524                 return true;
 525         return false;
 526     }
 527
 528     int64 GetDebit() const
 529     {
 530         int64 nDebit = 0;
 531         foreach(const CTxIn& txin, vin)
 532         {
 533             nDebit += txin.GetDebit();
 534             if (!MoneyRange(nDebit))
 535                 throw runtime_error("CTransaction::GetDebit() : value out of range");
 536         }
 537         return nDebit;
 538     }
 539
 540     int64 GetCredit() const
 541     {
 542         int64 nCredit = 0;
 543         foreach(const CTxOut& txout, vout)
 544         {
 545             nCredit += txout.GetCredit();
 546             if (!MoneyRange(nCredit))
 547                 throw runtime_error("CTransaction::GetCredit() : value out of range");
 548         }
 549         return nCredit;
 550     }
 551
 552     int64 GetValueOut() const
 553     {
 554         int64 nValueOut = 0;
 555         foreach(const CTxOut& txout, vout)
 556         {
 557             nValueOut += txout.nValue;
 558             if (!MoneyRange(txout.nValue) || !MoneyRange(nValueOut))
 559                 throw runtime_error("CTransaction::GetValueOut() : value out of range");
 560         }
 561         return nValueOut;
 562     }
 563
 564     int64 GetMinFee(unsigned int nBlockSize=1) const
 565     {
 566         // Base fee is 1 cent per kilobyte
 567         unsigned int nBytes = ::GetSerializeSize(*this, SER_NETWORK);
 568         int64 nMinFee = (1 + (int64)nBytes / 1000) * CENT;
 569
 570         // Transactions under 60K are free as long as block size is under 80K
 571         // (about 27,000bc if made of 50bc inputs)
 572         if (nBytes < 60000 && nBlockSize < 80000)
 573             nMinFee = 0;
 574
 575         // Transactions under 3K are free as long as block size is under 200K
 576         if (nBytes < 3000 && nBlockSize < 200000)
 577             nMinFee = 0;
 578
 579         // To limit dust spam, require a 0.01 fee if any output is less than 0.01
 580         if (nMinFee < CENT)
 581             foreach(const CTxOut& txout, vout)
 582                 if (txout.nValue < CENT)
 583                     nMinFee = CENT;
 584
 585         // Raise the price as the block approaches full
 586         if (MAX_BLOCK_SIZE/2 <= nBlockSize && nBlockSize < MAX_BLOCK_SIZE)
 587             nMinFee *= MAX_BLOCK_SIZE / (MAX_BLOCK_SIZE - nBlockSize);
 588         if (!MoneyRange(nMinFee))
 589             nMinFee = MAX_MONEY;
 590
 591         return nMinFee;
 592     }
 593
 594
 595     bool ReadFromDisk(CDiskTxPos pos, FILE** pfileRet=NULL)
 596     {
 597         CAutoFile filein = OpenBlockFile(pos.nFile, 0, pfileRet ? "rb+" : "rb");
 598         if (!filein)
 599             return error("CTransaction::ReadFromDisk() : OpenBlockFile failed");
 600
 601         // Read transaction
 602         if (fseek(filein, pos.nTxPos, SEEK_SET) != 0)
 603             return error("CTransaction::ReadFromDisk() : fseek failed");
 604         filein >> *this;
 605
 606         // Return file pointer
 607         if (pfileRet)
 608         {
 609             if (fseek(filein, pos.nTxPos, SEEK_SET) != 0)
 610                 return error("CTransaction::ReadFromDisk() : second fseek failed");
 611             *pfileRet = filein.release();
 612         }
 613         return true;
 614     }
 615
 616
 617     friend bool operator==(const CTransaction& a, const CTransaction& b)
 618     {
 619         return (a.nVersion  == b.nVersion &&
 620                 a.vin       == b.vin &&
 621                 a.vout      == b.vout &&
 622                 a.nLockTime == b.nLockTime);
 623     }
 624
 625     friend bool operator!=(const CTransaction& a, const CTransaction& b)
 626     {
 627         return !(a == b);
 628     }
 629
 630
 631     string ToString() const
 632     {
 633         string str;
 634         str += strprintf("CTransaction(hash=%s, ver=%d, vin.size=%d, vout.size=%d, nLockTime=%d)\n",
 635             GetHash().ToString().substr(0,6).c_str(),
 636             nVersion,
 637             vin.size(),
 638             vout.size(),
 639             nLockTime);
 640         for (int i = 0; i < vin.size(); i++)
 641             str += "    " + vin[i].ToString() + "\n";
 642         for (int i = 0; i < vout.size(); i++)
 643             str += "    " + vout[i].ToString() + "\n";
 644         return str;
 645     }
 646
 647     void print() const
 648     {
 649         printf("%s", ToString().c_str());
 650     }
 651
 652
 653
 654     bool DisconnectInputs(CTxDB& txdb);
 655     bool ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx,
 656                        CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee=0);
 657     bool ClientConnectInputs();
 658
 659     bool AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs=true, bool* pfMissingInputs=NULL);
 660
 661     bool AcceptToMemoryPool(bool fCheckInputs=true, bool* pfMissingInputs=NULL)
 662     {
 663         CTxDB txdb("r");
 664         return AcceptToMemoryPool(txdb, fCheckInputs, pfMissingInputs);
 665     }
 666
 667 protected:
 668     bool AddToMemoryPoolUnchecked();
 669 public:
 670     bool RemoveFromMemoryPool();
 671 };
 672
 673
 674
 675
 676
 677 //
 678 // A transaction with a merkle branch linking it to the block chain
 679 //
 680 class CMerkleTx : public CTransaction
 681 {
 682 public:
 683     uint256 hashBlock;
 684     vector<uint256> vMerkleBranch;
 685     int nIndex;
 686
 687     // memory only
 688     mutable bool fMerkleVerified;
 689     mutable bool fGetCreditCached;
 690     mutable int64 nGetCreditCached;
 691
 692
 693     CMerkleTx()
 694     {
 695         Init();
 696     }
 697
 698     CMerkleTx(const CTransaction& txIn) : CTransaction(txIn)
 699     {
 700         Init();
 701     }
 702
 703     void Init()
 704     {
 705         hashBlock = 0;
 706         nIndex = -1;
 707         fMerkleVerified = false;
 708         fGetCreditCached = false;
 709         nGetCreditCached = 0;
 710     }
 711
 712     IMPLEMENT_SERIALIZE
 713     (
 714         nSerSize += SerReadWrite(s, *(CTransaction*)this, nType, nVersion, ser_action);
 715         nVersion = this->nVersion;
 716         READWRITE(hashBlock);
 717         READWRITE(vMerkleBranch);
 718         READWRITE(nIndex);
 719     )
 720
 721     int64 GetCredit(bool fUseCache=false) const
 722     {
 723         // Must wait until coinbase is safely deep enough in the chain before valuing it
 724         if (IsCoinBase() && GetBlocksToMaturity() > 0)
 725             return 0;
 726
 727         // GetBalance can assume transactions in mapWallet won't change
 728         if (fUseCache && fGetCreditCached)
 729             return nGetCreditCached;
 730         nGetCreditCached = CTransaction::GetCredit();
 731         fGetCreditCached = true;
 732         return nGetCreditCached;
 733     }
 734
 735
 736     int SetMerkleBranch(const CBlock* pblock=NULL);
 737     int GetDepthInMainChain(int& nHeightRet) const;
 738     int GetDepthInMainChain() const { int nHeight; return GetDepthInMainChain(nHeight); }
 739     bool IsInMainChain() const { return GetDepthInMainChain() > 0; }
 740     int GetBlocksToMaturity() const;
 741     bool AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs=true);
 742     bool AcceptToMemoryPool() { CTxDB txdb("r"); return AcceptToMemoryPool(txdb); }
 743 };
 744
 745
 746
 747
 748 //
 749 // A transaction with a bunch of additional info that only the owner cares
 750 // about.  It includes any unrecorded transactions needed to link it back
 751 // to the block chain.
 752 //
 753 class CWalletTx : public CMerkleTx
 754 {
 755 public:
 756     vector<CMerkleTx> vtxPrev;
 757     map<string, string> mapValue;
 758     vector<pair<string, string> > vOrderForm;
 759     unsigned int fTimeReceivedIsTxTime;
 760     unsigned int nTimeReceived;  // time received by this node
 761     char fFromMe;
 762     char fSpent;
 763     //// probably need to sign the order info so know it came from payer
 764
 765     // memory only UI hints
 766     mutable unsigned int nTimeDisplayed;
 767     mutable int nLinesDisplayed;
 768
 769
 770     CWalletTx()
 771     {
 772         Init();
 773     }
 774
 775     CWalletTx(const CMerkleTx& txIn) : CMerkleTx(txIn)
 776     {
 777         Init();
 778     }
 779
 780     CWalletTx(const CTransaction& txIn) : CMerkleTx(txIn)
 781     {
 782         Init();
 783     }
 784
 785     void Init()
 786     {
 787         fTimeReceivedIsTxTime = false;
 788         nTimeReceived = 0;
 789         fFromMe = false;
 790         fSpent = false;
 791         nTimeDisplayed = 0;
 792         nLinesDisplayed = 0;
 793     }
 794
 795     IMPLEMENT_SERIALIZE
 796     (
 797         nSerSize += SerReadWrite(s, *(CMerkleTx*)this, nType, nVersion, ser_action);
 798         nVersion = this->nVersion;
 799         READWRITE(vtxPrev);
 800         READWRITE(mapValue);
 801         READWRITE(vOrderForm);
 802         READWRITE(fTimeReceivedIsTxTime);
 803         READWRITE(nTimeReceived);
 804         READWRITE(fFromMe);
 805         READWRITE(fSpent);
 806     )
 807
 808     bool WriteToDisk()
 809     {
 810         return CWalletDB().WriteTx(GetHash(), *this);
 811     }
 812
 813
 814     int64 GetTxTime() const;
 815     int GetRequestCount() const;
 816
 817     void AddSupportingTransactions(CTxDB& txdb);
 818
 819     bool AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs=true);
 820     bool AcceptWalletTransaction() { CTxDB txdb("r"); return AcceptWalletTransaction(txdb); }
 821
 822     void RelayWalletTransaction(CTxDB& txdb);
 823     void RelayWalletTransaction() { CTxDB txdb("r"); RelayWalletTransaction(txdb); }
 824 };
 825
 826
 827
 828
 829 //
 830 // A txdb record that contains the disk location of a transaction and the
 831 // locations of transactions that spend its outputs.  vSpent is really only
 832 // used as a flag, but having the location is very helpful for debugging.
 833 //
 834 class CTxIndex
 835 {
 836 public:
 837     CDiskTxPos pos;
 838     vector<CDiskTxPos> vSpent;
 839
 840     CTxIndex()
 841     {
 842         SetNull();
 843     }
 844
 845     CTxIndex(const CDiskTxPos& posIn, unsigned int nOutputs)
 846     {
 847         pos = posIn;
 848         vSpent.resize(nOutputs);
 849     }
 850
 851     IMPLEMENT_SERIALIZE
 852     (
 853         if (!(nType & SER_GETHASH))
 854             READWRITE(nVersion);
 855         READWRITE(pos);
 856         READWRITE(vSpent);
 857     )
 858
 859     void SetNull()
 860     {
 861         pos.SetNull();
 862         vSpent.clear();
 863     }
 864
 865     bool IsNull()
 866     {
 867         return pos.IsNull();
 868     }
 869
 870     friend bool operator==(const CTxIndex& a, const CTxIndex& b)
 871     {
 872         return (a.pos    == b.pos &&
 873                 a.vSpent == b.vSpent);
 874     }
 875
 876     friend bool operator!=(const CTxIndex& a, const CTxIndex& b)
 877     {
 878         return !(a == b);
 879     }
 880 };
 881
 882
 883
 884
 885
 886 //
 887 // Nodes collect new transactions into a block, hash them into a hash tree,
 888 // and scan through nonce values to make the block's hash satisfy proof-of-work
 889 // requirements.  When they solve the proof-of-work, they broadcast the block
 890 // to everyone and the block is added to the block chain.  The first transaction
 891 // in the block is a special one that creates a new coin owned by the creator
 892 // of the block.
 893 //
 894 // Blocks are appended to blk0001.dat files on disk.  Their location on disk
 895 // is indexed by CBlockIndex objects in memory.
 896 //
 897 class CBlock
 898 {
 899 public:
 900     // header
 901     int nVersion;
 902     uint256 hashPrevBlock;
 903     uint256 hashMerkleRoot;
 904     unsigned int nTime;
 905     unsigned int nBits;
 906     unsigned int nNonce;
 907
 908     // network and disk
 909     vector<CTransaction> vtx;
 910
 911     // memory only
 912     mutable vector<uint256> vMerkleTree;
 913
 914
 915     CBlock()
 916     {
 917         SetNull();
 918     }
 919
 920     IMPLEMENT_SERIALIZE
 921     (
 922         READWRITE(this->nVersion);
 923         nVersion = this->nVersion;
 924         READWRITE(hashPrevBlock);
 925         READWRITE(hashMerkleRoot);
 926         READWRITE(nTime);
 927         READWRITE(nBits);
 928         READWRITE(nNonce);
 929
 930         // ConnectBlock depends on vtx being last so it can calculate offset
 931         if (!(nType & (SER_GETHASH|SER_BLOCKHEADERONLY)))
 932             READWRITE(vtx);
 933         else if (fRead)
 934             const_cast<CBlock*>(this)->vtx.clear();
 935     )
 936
 937     void SetNull()
 938     {
 939         nVersion = 1;
 940         hashPrevBlock = 0;
 941         hashMerkleRoot = 0;
 942         nTime = 0;
 943         nBits = 0;
 944         nNonce = 0;
 945         vtx.clear();
 946         vMerkleTree.clear();
 947     }
 948
 949     bool IsNull() const
 950     {
 951         return (nBits == 0);
 952     }
 953
 954     uint256 GetHash() const
 955     {
 956         return Hash(BEGIN(nVersion), END(nNonce));
 957     }
 958
 959     int64 GetBlockTime() const
 960     {
 961         return (int64)nTime;
 962     }
 963
 964     int GetSigOpCount() const
 965     {
 966         int n = 0;
 967         foreach(const CTransaction& tx, vtx)
 968             n += tx.GetSigOpCount();
 969         return n;
 970     }
 971
 972
 973     uint256 BuildMerkleTree() const
 974     {
 975         vMerkleTree.clear();
 976         foreach(const CTransaction& tx, vtx)
 977             vMerkleTree.push_back(tx.GetHash());
 978         int j = 0;
 979         for (int nSize = vtx.size(); nSize > 1; nSize = (nSize + 1) / 2)
 980         {
 981             for (int i = 0; i < nSize; i += 2)
 982             {
 983                 int i2 = min(i+1, nSize-1);
 984                 vMerkleTree.push_back(Hash(BEGIN(vMerkleTree[j+i]),  END(vMerkleTree[j+i]),
 985                                            BEGIN(vMerkleTree[j+i2]), END(vMerkleTree[j+i2])));
 986             }
 987             j += nSize;
 988         }
 989         return (vMerkleTree.empty() ? 0 : vMerkleTree.back());
 990     }
 991
 992     vector<uint256> GetMerkleBranch(int nIndex) const
 993     {
 994         if (vMerkleTree.empty())
 995             BuildMerkleTree();
 996         vector<uint256> vMerkleBranch;
 997         int j = 0;
 998         for (int nSize = vtx.size(); nSize > 1; nSize = (nSize + 1) / 2)
 999         {
1000             int i = min(nIndex^1, nSize-1);
1001             vMerkleBranch.push_back(vMerkleTree[j+i]);
1002             nIndex >>= 1;
1003             j += nSize;
1004         }
1005         return vMerkleBranch;
1006     }
1007
1008     static uint256 CheckMerkleBranch(uint256 hash, const vector<uint256>& vMerkleBranch, int nIndex)
1009     {
1010         if (nIndex == -1)
1011             return 0;
1012         foreach(const uint256& otherside, vMerkleBranch)
1013         {
1014             if (nIndex & 1)
1015                 hash = Hash(BEGIN(otherside), END(otherside), BEGIN(hash), END(hash));
1016             else
1017                 hash = Hash(BEGIN(hash), END(hash), BEGIN(otherside), END(otherside));
1018             nIndex >>= 1;
1019         }
1020         return hash;
1021     }
1022
1023
1024     bool WriteToDisk(bool fWriteTransactions, unsigned int& nFileRet, unsigned int& nBlockPosRet)
1025     {
1026         // Open history file to append
1027         CAutoFile fileout = AppendBlockFile(nFileRet);
1028         if (!fileout)
1029             return error("CBlock::WriteToDisk() : AppendBlockFile failed");
1030         if (!fWriteTransactions)
1031             fileout.nType |= SER_BLOCKHEADERONLY;
1032
1033         // Write index header
1034         unsigned int nSize = fileout.GetSerializeSize(*this);
1035         fileout << FLATDATA(pchMessageStart) << nSize;
1036
1037         // Write block
1038         nBlockPosRet = ftell(fileout);
1039         if (nBlockPosRet == -1)
1040             return error("CBlock::WriteToDisk() : ftell failed");
1041         fileout << *this;
1042
1043         // Flush stdio buffers and commit to disk before returning
1044         fflush(fileout);
1045         if (!IsInitialBlockDownload() || (nBestHeight+1) % 500 == 0)
1046         {
1047 #ifdef __WXMSW__
1048             _commit(_fileno(fileout));
1049 #else
1050             fsync(fileno(fileout));
1051 #endif
1052         }
1053
1054         return true;
1055     }
1056
1057     bool ReadFromDisk(unsigned int nFile, unsigned int nBlockPos, bool fReadTransactions=true)
1058     {
1059         SetNull();
1060
1061         // Open history file to read
1062         CAutoFile filein = OpenBlockFile(nFile, nBlockPos, "rb");
1063         if (!filein)
1064             return error("CBlock::ReadFromDisk() : OpenBlockFile failed");
1065         if (!fReadTransactions)
1066             filein.nType |= SER_BLOCKHEADERONLY;
1067
1068         // Read block
1069         filein >> *this;
1070
1071         // Check the header
1072         if (!CheckProofOfWork(GetHash(), nBits))
1073             return error("CBlock::ReadFromDisk() : errors in block header");
1074
1075         return true;
1076     }
1077
1078
1079
1080     void print() const
1081     {
1082         printf("CBlock(hash=%s, ver=%d, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%d)\n",
1083             GetHash().ToString().substr(0,20).c_str(),
1084             nVersion,
1085             hashPrevBlock.ToString().substr(0,20).c_str(),
1086             hashMerkleRoot.ToString().substr(0,6).c_str(),
1087             nTime, nBits, nNonce,
1088             vtx.size());
1089         for (int i = 0; i < vtx.size(); i++)
1090         {
1091             printf("  ");
1092             vtx[i].print();
1093         }
1094         printf("  vMerkleTree: ");
1095         for (int i = 0; i < vMerkleTree.size(); i++)
1096             printf("%s ", vMerkleTree[i].ToString().substr(0,6).c_str());
1097         printf("\n");
1098     }
1099
1100
1101     int64 GetBlockValue(int nHeight, int64 nFees) const;
1102     bool DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex);
1103     bool ConnectBlock(CTxDB& txdb, CBlockIndex* pindex);
1104     bool ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions=true);
1105     bool SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew);
1106     bool AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos);
1107     bool CheckBlock() const;
1108     bool AcceptBlock();
1109 };
1110
1111
1112
1113
1114
1115
1116 //
1117 // The block chain is a tree shaped structure starting with the
1118 // genesis block at the root, with each block potentially having multiple
1119 // candidates to be the next block.  pprev and pnext link a path through the
1120 // main/longest chain.  A blockindex may have multiple pprev pointing back
1121 // to it, but pnext will only point forward to the longest branch, or will
1122 // be null if the block is not part of the longest chain.
1123 //
1124 class CBlockIndex
1125 {
1126 public:
1127     const uint256* phashBlock;
1128     CBlockIndex* pprev;
1129     CBlockIndex* pnext;
1130     unsigned int nFile;
1131     unsigned int nBlockPos;
1132     int nHeight;
1133     CBigNum bnChainWork;
1134
1135     // block header
1136     int nVersion;
1137     uint256 hashMerkleRoot;
1138     unsigned int nTime;
1139     unsigned int nBits;
1140     unsigned int nNonce;
1141
1142
1143     CBlockIndex()
1144     {
1145         phashBlock = NULL;
1146         pprev = NULL;
1147         pnext = NULL;
1148         nFile = 0;
1149         nBlockPos = 0;
1150         nHeight = 0;
1151         bnChainWork = 0;
1152
1153         nVersion       = 0;
1154         hashMerkleRoot = 0;
1155         nTime          = 0;
1156         nBits          = 0;
1157         nNonce         = 0;
1158     }
1159
1160     CBlockIndex(unsigned int nFileIn, unsigned int nBlockPosIn, CBlock& block)
1161     {
1162         phashBlock = NULL;
1163         pprev = NULL;
1164         pnext = NULL;
1165         nFile = nFileIn;
1166         nBlockPos = nBlockPosIn;
1167         nHeight = 0;
1168         bnChainWork = 0;
1169
1170         nVersion       = block.nVersion;
1171         hashMerkleRoot = block.hashMerkleRoot;
1172         nTime          = block.nTime;
1173         nBits          = block.nBits;
1174         nNonce         = block.nNonce;
1175     }
1176
1177     uint256 GetBlockHash() const
1178     {
1179         return *phashBlock;
1180     }
1181
1182     int64 GetBlockTime() const
1183     {
1184         return (int64)nTime;
1185     }
1186
1187     CBigNum GetBlockWork() const
1188     {
1189         if (CBigNum().SetCompact(nBits) <= 0)
1190             return 0;
1191         return (CBigNum(1)<<256) / (CBigNum().SetCompact(nBits)+1);
1192     }
1193
1194     bool IsInMainChain() const
1195     {
1196         return (pnext || this == pindexBest);
1197     }
1198
1199     bool CheckIndex() const
1200     {
1201         return CheckProofOfWork(GetBlockHash(), nBits);
1202     }
1203
1204     bool EraseBlockFromDisk()
1205     {
1206         // Open history file
1207         CAutoFile fileout = OpenBlockFile(nFile, nBlockPos, "rb+");
1208         if (!fileout)
1209             return false;
1210
1211         // Overwrite with empty null block
1212         CBlock block;
1213         block.SetNull();
1214         fileout << block;
1215
1216         return true;
1217     }
1218
1219     enum { nMedianTimeSpan=11 };
1220
1221     int64 GetMedianTimePast() const
1222     {
1223         int64 pmedian[nMedianTimeSpan];
1224         int64* pbegin = &pmedian[nMedianTimeSpan];
1225         int64* pend = &pmedian[nMedianTimeSpan];
1226
1227         const CBlockIndex* pindex = this;
1228         for (int i = 0; i < nMedianTimeSpan && pindex; i++, pindex = pindex->pprev)
1229             *(--pbegin) = pindex->GetBlockTime();
1230
1231         sort(pbegin, pend);
1232         return pbegin[(pend - pbegin)/2];
1233     }
1234
1235     int64 GetMedianTime() const
1236     {
1237         const CBlockIndex* pindex = this;
1238         for (int i = 0; i < nMedianTimeSpan/2; i++)
1239         {
1240             if (!pindex->pnext)
1241                 return GetBlockTime();
1242             pindex = pindex->pnext;
1243         }
1244         return pindex->GetMedianTimePast();
1245     }
1246
1247
1248
1249     string ToString() const
1250     {
1251         return strprintf("CBlockIndex(nprev=%08x, pnext=%08x, nFile=%d, nBlockPos=%-6d nHeight=%d, merkle=%s, hashBlock=%s)",
1252             pprev, pnext, nFile, nBlockPos, nHeight,
1253             hashMerkleRoot.ToString().substr(0,6).c_str(),
1254             GetBlockHash().ToString().substr(0,20).c_str());
1255     }
1256
1257     void print() const
1258     {
1259         printf("%s\n", ToString().c_str());
1260     }
1261 };
1262
1263
1264
1265 //
1266 // Used to marshal pointers into hashes for db storage.
1267 //
1268 class CDiskBlockIndex : public CBlockIndex
1269 {
1270 public:
1271     uint256 hashPrev;
1272     uint256 hashNext;
1273
1274     CDiskBlockIndex()
1275     {
1276         hashPrev = 0;
1277         hashNext = 0;
1278     }
1279
1280     explicit CDiskBlockIndex(CBlockIndex* pindex) : CBlockIndex(*pindex)
1281     {
1282         hashPrev = (pprev ? pprev->GetBlockHash() : 0);
1283         hashNext = (pnext ? pnext->GetBlockHash() : 0);
1284     }
1285
1286     IMPLEMENT_SERIALIZE
1287     (
1288         if (!(nType & SER_GETHASH))
1289             READWRITE(nVersion);
1290
1291         READWRITE(hashNext);
1292         READWRITE(nFile);
1293         READWRITE(nBlockPos);
1294         READWRITE(nHeight);
1295
1296         // block header
1297         READWRITE(this->nVersion);
1298         READWRITE(hashPrev);
1299         READWRITE(hashMerkleRoot);
1300         READWRITE(nTime);
1301         READWRITE(nBits);
1302         READWRITE(nNonce);
1303     )
1304
1305     uint256 GetBlockHash() const
1306     {
1307         CBlock block;
1308         block.nVersion        = nVersion;
1309         block.hashPrevBlock   = hashPrev;
1310         block.hashMerkleRoot  = hashMerkleRoot;
1311         block.nTime           = nTime;
1312         block.nBits           = nBits;
1313         block.nNonce          = nNonce;
1314         return block.GetHash();
1315     }
1316
1317
1318     string ToString() const
1319     {
1320         string str = "CDiskBlockIndex(";
1321         str += CBlockIndex::ToString();
1322         str += strprintf("\n                hashBlock=%s, hashPrev=%s, hashNext=%s)",
1323             GetBlockHash().ToString().c_str(),
1324             hashPrev.ToString().substr(0,20).c_str(),
1325             hashNext.ToString().substr(0,20).c_str());
1326         return str;
1327     }
1328
1329     void print() const
1330     {
1331         printf("%s\n", ToString().c_str());
1332     }
1333 };
1334
1335
1336
1337
1338
1339
1340
1341
1342 //
1343 // Describes a place in the block chain to another node such that if the
1344 // other node doesn't have the same branch, it can find a recent common trunk.
1345 // The further back it is, the further before the fork it may be.
1346 //
1347 class CBlockLocator
1348 {
1349 protected:
1350     vector<uint256> vHave;
1351 public:
1352
1353     CBlockLocator()
1354     {
1355     }
1356
1357     explicit CBlockLocator(const CBlockIndex* pindex)
1358     {
1359         Set(pindex);
1360     }
1361
1362     explicit CBlockLocator(uint256 hashBlock)
1363     {
1364         map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
1365         if (mi != mapBlockIndex.end())
1366             Set((*mi).second);
1367     }
1368
1369     IMPLEMENT_SERIALIZE
1370     (
1371         if (!(nType & SER_GETHASH))
1372             READWRITE(nVersion);
1373         READWRITE(vHave);
1374     )
1375
1376     void Set(const CBlockIndex* pindex)
1377     {
1378         vHave.clear();
1379         int nStep = 1;
1380         while (pindex)
1381         {
1382             vHave.push_back(pindex->GetBlockHash());
1383
1384             // Exponentially larger steps back
1385             for (int i = 0; pindex && i < nStep; i++)
1386                 pindex = pindex->pprev;
1387             if (vHave.size() > 10)
1388                 nStep *= 2;
1389         }
1390         vHave.push_back(hashGenesisBlock);
1391     }
1392
1393     int GetDistanceBack()
1394     {
1395         // Retrace how far back it was in the sender's branch
1396         int nDistance = 0;
1397         int nStep = 1;
1398         foreach(const uint256& hash, vHave)
1399         {
1400             map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
1401             if (mi != mapBlockIndex.end())
1402             {
1403                 CBlockIndex* pindex = (*mi).second;
1404                 if (pindex->IsInMainChain())
1405                     return nDistance;
1406             }
1407             nDistance += nStep;
1408             if (nDistance > 10)
1409                 nStep *= 2;
1410         }
1411         return nDistance;
1412     }
1413
1414     CBlockIndex* GetBlockIndex()
1415     {
1416         // Find the first block the caller has in the main chain
1417         foreach(const uint256& hash, vHave)
1418         {
1419             map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
1420             if (mi != mapBlockIndex.end())
1421             {
1422                 CBlockIndex* pindex = (*mi).second;
1423                 if (pindex->IsInMainChain())
1424                     return pindex;
1425             }
1426         }
1427         return pindexGenesisBlock;
1428     }
1429
1430     uint256 GetBlockHash()
1431     {
1432         // Find the first block the caller has in the main chain
1433         foreach(const uint256& hash, vHave)
1434         {
1435             map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hash);
1436             if (mi != mapBlockIndex.end())
1437             {
1438                 CBlockIndex* pindex = (*mi).second;
1439                 if (pindex->IsInMainChain())
1440                     return hash;
1441             }
1442         }
1443         return hashGenesisBlock;
1444     }
1445
1446     int GetHeight()
1447     {
1448         CBlockIndex* pindex = GetBlockIndex();
1449         if (!pindex)
1450             return 0;
1451         return pindex->nHeight;
1452     }
1453 };
1454
1455
1456
1457
1458
1459
1460 //
1461 // Private key that includes an expiration date in case it never gets used.
1462 //
1463 class CWalletKey
1464 {
1465 public:
1466     CPrivKey vchPrivKey;
1467     int64 nTimeCreated;
1468     int64 nTimeExpires;
1469     string strComment;
1470     //// todo: add something to note what created it (user, getnewaddress, change)
1471     ////   maybe should have a map<string, string> property map
1472
1473     CWalletKey(int64 nTimeExpiresIn=0)
1474     {
1475         nTimeCreated = (nTimeExpiresIn ? GetTime() : 0);
1476         nTimeExpires = nTimeExpiresIn;
1477     }
1478
1479     IMPLEMENT_SERIALIZE
1480     (
1481         if (!(nType & SER_GETHASH))
1482             READWRITE(nVersion);
1483         READWRITE(vchPrivKey);
1484         READWRITE(nTimeCreated);
1485         READWRITE(nTimeExpires);
1486         READWRITE(strComment);
1487     )
1488 };
1489
1490
1491
1492
1493
1494
1495 //
1496 // Alert messages are broadcast as a vector of signed data.  Unserializing may
1497 // not read the entire buffer if the alert is for a newer version, but older
1498 // versions can still relay the original data.
1499 //
1500 class CUnsignedAlert
1501 {
1502 public:
1503     int nVersion;
1504     int64 nRelayUntil;      // when newer nodes stop relaying to newer nodes
1505     int64 nExpiration;
1506     int nID;
1507     int nCancel;
1508     set<int> setCancel;
1509     int nMinVer;            // lowest version inclusive
1510     int nMaxVer;            // highest version inclusive
1511     set<string> setSubVer;  // empty matches all
1512     int nPriority;
1513
1514     // Actions
1515     string strComment;
1516     string strStatusBar;
1517     string strRPCError;
1518
1519     IMPLEMENT_SERIALIZE
1520     (
1521         READWRITE(this->nVersion);
1522         nVersion = this->nVersion;
1523         READWRITE(nRelayUntil);
1524         READWRITE(nExpiration);
1525         READWRITE(nID);
1526         READWRITE(nCancel);
1527         READWRITE(setCancel);
1528         READWRITE(nMinVer);
1529         READWRITE(nMaxVer);
1530         READWRITE(setSubVer);
1531         READWRITE(nPriority);
1532
1533         READWRITE(strComment);
1534         READWRITE(strStatusBar);
1535         READWRITE(strRPCError);
1536     )
1537
1538     void SetNull()
1539     {
1540         nVersion = 1;
1541         nRelayUntil = 0;
1542         nExpiration = 0;
1543         nID = 0;
1544         nCancel = 0;
1545         setCancel.clear();
1546         nMinVer = 0;
1547         nMaxVer = 0;
1548         setSubVer.clear();
1549         nPriority = 0;
1550
1551         strComment.clear();
1552         strStatusBar.clear();
1553         strRPCError.clear();
1554     }
1555
1556     string ToString() const
1557     {
1558         string strSetCancel;
1559         foreach(int n, setCancel)
1560             strSetCancel += strprintf("%d ", n);
1561         string strSetSubVer;
1562         foreach(string str, setSubVer)
1563             strSetSubVer += "\"" + str + "\" ";
1564         return strprintf(
1565                 "CAlert(\n"
1566                 "    nVersion     = %d\n"
1567                 "    nRelayUntil  = %"PRI64d"\n"
1568                 "    nExpiration  = %"PRI64d"\n"
1569                 "    nID          = %d\n"
1570                 "    nCancel      = %d\n"
1571                 "    setCancel    = %s\n"
1572                 "    nMinVer      = %d\n"
1573                 "    nMaxVer      = %d\n"
1574                 "    setSubVer    = %s\n"
1575                 "    nPriority    = %d\n"
1576                 "    strComment   = \"%s\"\n"
1577                 "    strStatusBar = \"%s\"\n"
1578                 "    strRPCError  = \"%s\"\n"
1579                 ")\n",
1580             nVersion,
1581             nRelayUntil,
1582             nExpiration,
1583             nID,
1584             nCancel,
1585             strSetCancel.c_str(),
1586             nMinVer,
1587             nMaxVer,
1588             strSetSubVer.c_str(),
1589             nPriority,
1590             strComment.c_str(),
1591             strStatusBar.c_str(),
1592             strRPCError.c_str());
1593     }
1594
1595     void print() const
1596     {
1597         printf("%s", ToString().c_str());
1598     }
1599 };
1600
1601 class CAlert : public CUnsignedAlert
1602 {
1603 public:
1604     vector<unsigned char> vchMsg;
1605     vector<unsigned char> vchSig;
1606
1607     CAlert()
1608     {
1609         SetNull();
1610     }
1611
1612     IMPLEMENT_SERIALIZE
1613     (
1614         READWRITE(vchMsg);
1615         READWRITE(vchSig);
1616     )
1617
1618     void SetNull()
1619     {
1620         CUnsignedAlert::SetNull();
1621         vchMsg.clear();
1622         vchSig.clear();
1623     }
1624
1625     bool IsNull() const
1626     {
1627         return (nExpiration == 0);
1628     }
1629
1630     uint256 GetHash() const
1631     {
1632         return SerializeHash(*this);
1633     }
1634
1635     bool IsInEffect() const
1636     {
1637         return (GetAdjustedTime() < nExpiration);
1638     }
1639
1640     bool Cancels(const CAlert& alert) const
1641     {
1642         if (!IsInEffect())
1643             false;
1644         return (alert.nID <= nCancel || setCancel.count(alert.nID));
1645     }
1646
1647     bool AppliesTo(int nVersion, string strSubVerIn) const
1648     {
1649         return (IsInEffect() &&
1650                 nMinVer <= nVersion && nVersion <= nMaxVer &&
1651                 (setSubVer.empty() || setSubVer.count(strSubVerIn)));
1652     }
1653
1654     bool AppliesToMe() const
1655     {
1656         return AppliesTo(VERSION, ::pszSubVer);
1657     }
1658
1659     bool RelayTo(CNode* pnode) const
1660     {
1661         if (!IsInEffect())
1662             return false;
1663         // returns true if wasn't already contained in the set
1664         if (pnode->setKnown.insert(GetHash()).second)
1665         {
1666             if (AppliesTo(pnode->nVersion, pnode->strSubVer) ||
1667                 AppliesToMe() ||
1668                 GetAdjustedTime() < nRelayUntil)
1669             {
1670                 pnode->PushMessage("alert", *this);
1671                 return true;
1672             }
1673         }
1674         return false;
1675     }
1676
1677     bool CheckSignature()
1678     {
1679         CKey key;
1680         if (!key.SetPubKey(ParseHex("04fc9702847840aaf195de8442ebecedf5b095cdbb9bc716bda9110971b28a49e0ead8564ff0db22209e0374782c093bb899692d524e9d6a6956e7c5ecbcd68284")))
1681             return error("CAlert::CheckSignature() : SetPubKey failed");
1682         if (!key.Verify(Hash(vchMsg.begin(), vchMsg.end()), vchSig))
1683             return error("CAlert::CheckSignature() : verify signature failed");
1684
1685         // Now unserialize the data
1686         CDataStream sMsg(vchMsg);
1687         sMsg >> *(CUnsignedAlert*)this;
1688         return true;
1689     }
1690
1691     bool ProcessAlert();
1692 };
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703 extern map<uint256, CTransaction> mapTransactions;
1704 extern map<uint256, CWalletTx> mapWallet;
1705 extern vector<uint256> vWalletUpdated;
1706 extern CCriticalSection cs_mapWallet;
1707 extern map<vector<unsigned char>, CPrivKey> mapKeys;
1708 extern map<uint160, vector<unsigned char> > mapPubKeys;
1709 extern CCriticalSection cs_mapKeys;
1710 extern CKey keyUser;