raw
genesis                 1 // Copyright (c) 2009-2010 Satoshi Nakamoto
genesis 2 // Copyright (c) 2009-2012 The Bitcoin developers
genesis 3 // Distributed under the MIT/X11 software license, see the accompanying
genesis 4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
genesis 5 #include "headers.h"
genesis 6 #include "checkpoints.h"
genesis 7 #include "db.h"
genesis 8 #include "net.h"
genesis 9 #include "init.h"
genesis 10 #include <boost/filesystem.hpp>
genesis 11 #include <boost/filesystem/fstream.hpp>
genesis 12
genesis 13 using namespace std;
genesis 14 using namespace boost;
genesis 15
genesis 16 //
genesis 17 // Global state
genesis 18 //
genesis 19
genesis 20 CCriticalSection cs_setpwalletRegistered;
genesis 21 set<CWallet*> setpwalletRegistered;
genesis 22
genesis 23 CCriticalSection cs_main;
genesis 24
genesis 25 static map<uint256, CTransaction> mapTransactions;
genesis 26 CCriticalSection cs_mapTransactions;
genesis 27 unsigned int nTransactionsUpdated = 0;
genesis 28 map<COutPoint, CInPoint> mapNextTx;
genesis 29
genesis 30 map<uint256, CBlockIndex*> mapBlockIndex;
genesis 31 uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
genesis 32 static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
genesis 33 CBlockIndex* pindexGenesisBlock = NULL;
genesis 34 int nBestHeight = -1;
genesis 35 CBigNum bnBestChainWork = 0;
genesis 36 CBigNum bnBestInvalidWork = 0;
genesis 37 uint256 hashBestChain = 0;
genesis 38 CBlockIndex* pindexBest = NULL;
genesis 39 int64 nTimeBestReceived = 0;
genesis 40
genesis 41 CMedianFilter<int> cPeerBlockCounts(5, 0); // Amount of blocks that other nodes claim to have
genesis 42
genesis 43 map<uint256, CBlock*> mapOrphanBlocks;
genesis 44 multimap<uint256, CBlock*> mapOrphanBlocksByPrev;
genesis 45
genesis 46 map<uint256, CDataStream*> mapOrphanTransactions;
genesis 47 multimap<uint256, CDataStream*> mapOrphanTransactionsByPrev;
genesis 48
genesis 49
genesis 50 double dHashesPerSec;
genesis 51 int64 nHPSTimerStart;
genesis 52
genesis 53 // Settings
genesis 54 int fGenerateBitcoins = false;
genesis 55 int64 nTransactionFee = 0;
genesis 56 int fLimitProcessors = false;
genesis 57 int nLimitProcessors = 1;
genesis 58 int fMinimizeToTray = true;
genesis 59 int fMinimizeOnClose = true;
genesis 60
genesis 61
genesis 62 //////////////////////////////////////////////////////////////////////////////
genesis 63 //
genesis 64 // dispatching functions
genesis 65 //
genesis 66
genesis 67 // These functions dispatch to one or all registered wallets
genesis 68
genesis 69
genesis 70 void RegisterWallet(CWallet* pwalletIn)
genesis 71 {
genesis 72 CRITICAL_BLOCK(cs_setpwalletRegistered)
genesis 73 {
genesis 74 setpwalletRegistered.insert(pwalletIn);
genesis 75 }
genesis 76 }
genesis 77
genesis 78 void UnregisterWallet(CWallet* pwalletIn)
genesis 79 {
genesis 80 CRITICAL_BLOCK(cs_setpwalletRegistered)
genesis 81 {
genesis 82 setpwalletRegistered.erase(pwalletIn);
genesis 83 }
genesis 84 }
genesis 85
genesis 86 // check whether the passed transaction is from us
genesis 87 bool static IsFromMe(CTransaction& tx)
genesis 88 {
genesis 89 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 90 if (pwallet->IsFromMe(tx))
genesis 91 return true;
genesis 92 return false;
genesis 93 }
genesis 94
genesis 95 // get the wallet transaction with the given hash (if it exists)
genesis 96 bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
genesis 97 {
genesis 98 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 99 if (pwallet->GetTransaction(hashTx,wtx))
genesis 100 return true;
genesis 101 return false;
genesis 102 }
genesis 103
genesis 104 // erases transaction with the given hash from all wallets
genesis 105 void static EraseFromWallets(uint256 hash)
genesis 106 {
genesis 107 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 108 pwallet->EraseFromWallet(hash);
genesis 109 }
genesis 110
genesis 111 // make sure all wallets know about the given transaction, in the given block
genesis 112 void static SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL, bool fUpdate = false)
genesis 113 {
genesis 114 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 115 pwallet->AddToWalletIfInvolvingMe(tx, pblock, fUpdate);
genesis 116 }
genesis 117
genesis 118 // notify wallets about a new best chain
genesis 119 void static SetBestChain(const CBlockLocator& loc)
genesis 120 {
genesis 121 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 122 pwallet->SetBestChain(loc);
genesis 123 }
genesis 124
genesis 125 // notify wallets about an updated transaction
genesis 126 void static UpdatedTransaction(const uint256& hashTx)
genesis 127 {
genesis 128 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 129 pwallet->UpdatedTransaction(hashTx);
genesis 130 }
genesis 131
genesis 132 // dump all wallets
genesis 133 void static PrintWallets(const CBlock& block)
genesis 134 {
genesis 135 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 136 pwallet->PrintWallet(block);
genesis 137 }
genesis 138
genesis 139 // notify wallets about an incoming inventory (for request counts)
genesis 140 void static Inventory(const uint256& hash)
genesis 141 {
genesis 142 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 143 pwallet->Inventory(hash);
genesis 144 }
genesis 145
genesis 146 // ask wallets to resend their transactions
genesis 147 void static ResendWalletTransactions()
genesis 148 {
genesis 149 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 150 pwallet->ResendWalletTransactions();
genesis 151 }
genesis 152
genesis 153
genesis 154
genesis 155
genesis 156
genesis 157
genesis 158
genesis 159 //////////////////////////////////////////////////////////////////////////////
genesis 160 //
genesis 161 // mapOrphanTransactions
genesis 162 //
genesis 163
genesis 164 void AddOrphanTx(const CDataStream& vMsg)
genesis 165 {
genesis 166 CTransaction tx;
genesis 167 CDataStream(vMsg) >> tx;
genesis 168 uint256 hash = tx.GetHash();
genesis 169 if (mapOrphanTransactions.count(hash))
genesis 170 return;
genesis 171
genesis 172 CDataStream* pvMsg = mapOrphanTransactions[hash] = new CDataStream(vMsg);
genesis 173 BOOST_FOREACH(const CTxIn& txin, tx.vin)
genesis 174 mapOrphanTransactionsByPrev.insert(make_pair(txin.prevout.hash, pvMsg));
genesis 175 }
genesis 176
genesis 177 void static EraseOrphanTx(uint256 hash)
genesis 178 {
genesis 179 if (!mapOrphanTransactions.count(hash))
genesis 180 return;
genesis 181 const CDataStream* pvMsg = mapOrphanTransactions[hash];
genesis 182 CTransaction tx;
genesis 183 CDataStream(*pvMsg) >> tx;
genesis 184 BOOST_FOREACH(const CTxIn& txin, tx.vin)
genesis 185 {
genesis 186 for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(txin.prevout.hash);
genesis 187 mi != mapOrphanTransactionsByPrev.upper_bound(txin.prevout.hash);)
genesis 188 {
genesis 189 if ((*mi).second == pvMsg)
genesis 190 mapOrphanTransactionsByPrev.erase(mi++);
genesis 191 else
genesis 192 mi++;
genesis 193 }
genesis 194 }
genesis 195 delete pvMsg;
genesis 196 mapOrphanTransactions.erase(hash);
genesis 197 }
genesis 198
genesis 199 int LimitOrphanTxSize(int nMaxOrphans)
genesis 200 {
genesis 201 int nEvicted = 0;
genesis 202 while (mapOrphanTransactions.size() > nMaxOrphans)
genesis 203 {
genesis 204 // Evict a random orphan:
genesis 205 std::vector<unsigned char> randbytes(32);
genesis 206 RAND_bytes(&randbytes[0], 32);
genesis 207 uint256 randomhash(randbytes);
genesis 208 map<uint256, CDataStream*>::iterator it = mapOrphanTransactions.lower_bound(randomhash);
genesis 209 if (it == mapOrphanTransactions.end())
genesis 210 it = mapOrphanTransactions.begin();
genesis 211 EraseOrphanTx(it->first);
genesis 212 ++nEvicted;
genesis 213 }
genesis 214 return nEvicted;
genesis 215 }
genesis 216
genesis 217
genesis 218
genesis 219
genesis 220
genesis 221
genesis 222
genesis 223 //////////////////////////////////////////////////////////////////////////////
genesis 224 //
genesis 225 // CTransaction and CTxIndex
genesis 226 //
genesis 227
genesis 228 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout, CTxIndex& txindexRet)
genesis 229 {
genesis 230 SetNull();
genesis 231 if (!txdb.ReadTxIndex(prevout.hash, txindexRet))
genesis 232 return false;
genesis 233 if (!ReadFromDisk(txindexRet.pos))
genesis 234 return false;
genesis 235 if (prevout.n >= vout.size())
genesis 236 {
genesis 237 SetNull();
genesis 238 return false;
genesis 239 }
genesis 240 return true;
genesis 241 }
genesis 242
genesis 243 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout)
genesis 244 {
genesis 245 CTxIndex txindex;
genesis 246 return ReadFromDisk(txdb, prevout, txindex);
genesis 247 }
genesis 248
genesis 249 bool CTransaction::ReadFromDisk(COutPoint prevout)
genesis 250 {
genesis 251 CTxDB txdb("r");
genesis 252 CTxIndex txindex;
genesis 253 return ReadFromDisk(txdb, prevout, txindex);
genesis 254 }
genesis 255
genesis 256
genesis 257
genesis 258 int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
genesis 259 {
genesis 260 if (fClient)
genesis 261 {
genesis 262 if (hashBlock == 0)
genesis 263 return 0;
genesis 264 }
genesis 265 else
genesis 266 {
genesis 267 CBlock blockTmp;
genesis 268 if (pblock == NULL)
genesis 269 {
genesis 270 // Load the block this tx is in
genesis 271 CTxIndex txindex;
genesis 272 if (!CTxDB("r").ReadTxIndex(GetHash(), txindex))
genesis 273 return 0;
genesis 274 if (!blockTmp.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos))
genesis 275 return 0;
genesis 276 pblock = &blockTmp;
genesis 277 }
genesis 278
genesis 279 // Update the tx's hashBlock
genesis 280 hashBlock = pblock->GetHash();
genesis 281
genesis 282 // Locate the transaction
genesis 283 for (nIndex = 0; nIndex < pblock->vtx.size(); nIndex++)
genesis 284 if (pblock->vtx[nIndex] == *(CTransaction*)this)
genesis 285 break;
genesis 286 if (nIndex == pblock->vtx.size())
genesis 287 {
genesis 288 vMerkleBranch.clear();
genesis 289 nIndex = -1;
genesis 290 printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
genesis 291 return 0;
genesis 292 }
genesis 293
genesis 294 // Fill in merkle branch
genesis 295 vMerkleBranch = pblock->GetMerkleBranch(nIndex);
genesis 296 }
genesis 297
genesis 298 // Is the tx in a block that's in the main chain
genesis 299 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
genesis 300 if (mi == mapBlockIndex.end())
genesis 301 return 0;
genesis 302 CBlockIndex* pindex = (*mi).second;
genesis 303 if (!pindex || !pindex->IsInMainChain())
genesis 304 return 0;
genesis 305
genesis 306 return pindexBest->nHeight - pindex->nHeight + 1;
genesis 307 }
genesis 308
genesis 309
genesis 310
genesis 311
genesis 312
genesis 313
genesis 314
genesis 315 bool CTransaction::CheckTransaction() const
genesis 316 {
genesis 317 // Basic checks that don't depend on any context
genesis 318 if (vin.empty())
genesis 319 return DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
genesis 320 if (vout.empty())
genesis 321 return DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
genesis 322 // Size limits
genesis 323 if (::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
genesis 324 return DoS(100, error("CTransaction::CheckTransaction() : size limits failed"));
genesis 325
genesis 326 // Check for negative or overflow output values
genesis 327 int64 nValueOut = 0;
genesis 328 BOOST_FOREACH(const CTxOut& txout, vout)
genesis 329 {
genesis 330 if (txout.nValue < 0)
genesis 331 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue negative"));
genesis 332 if (txout.nValue > MAX_MONEY)
genesis 333 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
genesis 334 nValueOut += txout.nValue;
genesis 335 if (!MoneyRange(nValueOut))
genesis 336 return DoS(100, error("CTransaction::CheckTransaction() : txout total out of range"));
genesis 337 }
genesis 338
genesis 339 // Check for duplicate inputs
genesis 340 set<COutPoint> vInOutPoints;
genesis 341 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 342 {
genesis 343 if (vInOutPoints.count(txin.prevout))
genesis 344 return false;
genesis 345 vInOutPoints.insert(txin.prevout);
genesis 346 }
genesis 347
genesis 348 if (IsCoinBase())
genesis 349 {
genesis 350 if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
genesis 351 return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size"));
genesis 352 }
genesis 353 else
genesis 354 {
genesis 355 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 356 if (txin.prevout.IsNull())
genesis 357 return DoS(10, error("CTransaction::CheckTransaction() : prevout is null"));
genesis 358 }
genesis 359
genesis 360 return true;
genesis 361 }
genesis 362
genesis 363 bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMissingInputs)
genesis 364 {
genesis 365 if (pfMissingInputs)
genesis 366 *pfMissingInputs = false;
genesis 367
genesis 368 if (!CheckTransaction())
genesis 369 return error("AcceptToMemoryPool() : CheckTransaction failed");
genesis 370
genesis 371 // Coinbase is only valid in a block, not as a loose transaction
genesis 372 if (IsCoinBase())
genesis 373 return DoS(100, error("AcceptToMemoryPool() : coinbase as individual tx"));
genesis 374
genesis 375 // To help v0.1.5 clients who would see it as a negative number
genesis 376 if ((int64)nLockTime > INT_MAX)
genesis 377 return error("AcceptToMemoryPool() : not accepting nLockTime beyond 2038 yet");
genesis 378
genesis 379 // Safety limits
genesis 380 unsigned int nSize = ::GetSerializeSize(*this, SER_NETWORK);
genesis 381 // Checking ECDSA signatures is a CPU bottleneck, so to avoid denial-of-service
genesis 382 // attacks disallow transactions with more than one SigOp per 34 bytes.
genesis 383 // 34 bytes because a TxOut is:
genesis 384 // 20-byte address + 8 byte bitcoin amount + 5 bytes of ops + 1 byte script length
genesis 385 if (GetSigOpCount() > nSize / 34 || nSize < 100)
genesis 386 return error("AcceptToMemoryPool() : transaction with out-of-bounds SigOpCount");
genesis 387
genesis 388 // Rather not work on nonstandard transactions (unless -testnet)
genesis 389 if (!fTestNet && !IsStandard())
genesis 390 return error("AcceptToMemoryPool() : nonstandard transaction type");
genesis 391
genesis 392 // Do we already have it?
genesis 393 uint256 hash = GetHash();
genesis 394 CRITICAL_BLOCK(cs_mapTransactions)
genesis 395 if (mapTransactions.count(hash))
genesis 396 return false;
genesis 397 if (fCheckInputs)
genesis 398 if (txdb.ContainsTx(hash))
genesis 399 return false;
genesis 400
genesis 401 // Check for conflicts with in-memory transactions
genesis 402 CTransaction* ptxOld = NULL;
genesis 403 for (int i = 0; i < vin.size(); i++)
genesis 404 {
genesis 405 COutPoint outpoint = vin[i].prevout;
genesis 406 if (mapNextTx.count(outpoint))
genesis 407 {
genesis 408 // Disable replacement feature for now
genesis 409 return false;
genesis 410
genesis 411 // Allow replacing with a newer version of the same transaction
genesis 412 if (i != 0)
genesis 413 return false;
genesis 414 ptxOld = mapNextTx[outpoint].ptx;
genesis 415 if (ptxOld->IsFinal())
genesis 416 return false;
genesis 417 if (!IsNewerThan(*ptxOld))
genesis 418 return false;
genesis 419 for (int i = 0; i < vin.size(); i++)
genesis 420 {
genesis 421 COutPoint outpoint = vin[i].prevout;
genesis 422 if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
genesis 423 return false;
genesis 424 }
genesis 425 break;
genesis 426 }
genesis 427 }
genesis 428
genesis 429 if (fCheckInputs)
genesis 430 {
genesis 431 // Check against previous transactions
genesis 432 map<uint256, CTxIndex> mapUnused;
genesis 433 int64 nFees = 0;
genesis 434 bool fInvalid = false;
genesis 435 if (!ConnectInputs(txdb, mapUnused, CDiskTxPos(1,1,1), pindexBest, nFees, false, false, 0, fInvalid))
genesis 436 {
genesis 437 if (fInvalid)
genesis 438 return error("AcceptToMemoryPool() : FetchInputs found invalid tx %s", hash.ToString().substr(0,10).c_str());
genesis 439 return error("AcceptToMemoryPool() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
genesis 440 }
genesis 441
genesis 442 // Don't accept it if it can't get into a block
genesis 443 if (nFees < GetMinFee(1000, true, true))
genesis 444 return error("AcceptToMemoryPool() : not enough fees");
genesis 445
genesis 446 // Continuously rate-limit free transactions
genesis 447 // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
genesis 448 // be annoying or make other's transactions take longer to confirm.
genesis 449 if (nFees < MIN_RELAY_TX_FEE)
genesis 450 {
genesis 451 static CCriticalSection cs;
genesis 452 static double dFreeCount;
genesis 453 static int64 nLastTime;
genesis 454 int64 nNow = GetTime();
genesis 455
genesis 456 CRITICAL_BLOCK(cs)
genesis 457 {
genesis 458 // Use an exponentially decaying ~10-minute window:
genesis 459 dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
genesis 460 nLastTime = nNow;
genesis 461 // -limitfreerelay unit is thousand-bytes-per-minute
genesis 462 // At default rate it would take over a month to fill 1GB
genesis 463 if (dFreeCount > GetArg("-limitfreerelay", 15)*10*1000 && !IsFromMe(*this))
genesis 464 return error("AcceptToMemoryPool() : free transaction rejected by rate limiter");
genesis 465 if (fDebug)
genesis 466 printf("Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
genesis 467 dFreeCount += nSize;
genesis 468 }
genesis 469 }
genesis 470 }
genesis 471
genesis 472 // Store transaction in memory
genesis 473 CRITICAL_BLOCK(cs_mapTransactions)
genesis 474 {
genesis 475 if (ptxOld)
genesis 476 {
genesis 477 printf("AcceptToMemoryPool() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
genesis 478 ptxOld->RemoveFromMemoryPool();
genesis 479 }
genesis 480 AddToMemoryPoolUnchecked();
genesis 481 }
genesis 482
genesis 483 ///// are we sure this is ok when loading transactions or restoring block txes
genesis 484 // If updated, erase old tx from wallet
genesis 485 if (ptxOld)
genesis 486 EraseFromWallets(ptxOld->GetHash());
genesis 487
genesis 488 printf("AcceptToMemoryPool(): accepted %s\n", hash.ToString().substr(0,10).c_str());
genesis 489 return true;
genesis 490 }
genesis 491
genesis 492 bool CTransaction::AcceptToMemoryPool(bool fCheckInputs, bool* pfMissingInputs)
genesis 493 {
genesis 494 CTxDB txdb("r");
genesis 495 return AcceptToMemoryPool(txdb, fCheckInputs, pfMissingInputs);
genesis 496 }
genesis 497
genesis 498 bool CTransaction::AddToMemoryPoolUnchecked()
genesis 499 {
genesis 500 // Add to memory pool without checking anything. Don't call this directly,
genesis 501 // call AcceptToMemoryPool to properly check the transaction first.
genesis 502 CRITICAL_BLOCK(cs_mapTransactions)
genesis 503 {
genesis 504 uint256 hash = GetHash();
genesis 505 mapTransactions[hash] = *this;
genesis 506 for (int i = 0; i < vin.size(); i++)
genesis 507 mapNextTx[vin[i].prevout] = CInPoint(&mapTransactions[hash], i);
genesis 508 nTransactionsUpdated++;
genesis 509 }
genesis 510 return true;
genesis 511 }
genesis 512
genesis 513
genesis 514 bool CTransaction::RemoveFromMemoryPool()
genesis 515 {
genesis 516 // Remove transaction from memory pool
genesis 517 CRITICAL_BLOCK(cs_mapTransactions)
genesis 518 {
genesis 519 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 520 mapNextTx.erase(txin.prevout);
genesis 521 mapTransactions.erase(GetHash());
genesis 522 nTransactionsUpdated++;
genesis 523 }
genesis 524 return true;
genesis 525 }
genesis 526
genesis 527
genesis 528
genesis 529
genesis 530
genesis 531
genesis 532 int CMerkleTx::GetDepthInMainChain(int& nHeightRet) const
genesis 533 {
genesis 534 if (hashBlock == 0 || nIndex == -1)
genesis 535 return 0;
genesis 536
genesis 537 // Find the block it claims to be in
genesis 538 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
genesis 539 if (mi == mapBlockIndex.end())
genesis 540 return 0;
genesis 541 CBlockIndex* pindex = (*mi).second;
genesis 542 if (!pindex || !pindex->IsInMainChain())
genesis 543 return 0;
genesis 544
genesis 545 // Make sure the merkle branch connects to this block
genesis 546 if (!fMerkleVerified)
genesis 547 {
genesis 548 if (CBlock::CheckMerkleBranch(GetHash(), vMerkleBranch, nIndex) != pindex->hashMerkleRoot)
genesis 549 return 0;
genesis 550 fMerkleVerified = true;
genesis 551 }
genesis 552
genesis 553 nHeightRet = pindex->nHeight;
genesis 554 return pindexBest->nHeight - pindex->nHeight + 1;
genesis 555 }
genesis 556
genesis 557
genesis 558 int CMerkleTx::GetBlocksToMaturity() const
genesis 559 {
genesis 560 if (!IsCoinBase())
genesis 561 return 0;
genesis 562 return max(0, (COINBASE_MATURITY+20) - GetDepthInMainChain());
genesis 563 }
genesis 564
genesis 565
genesis 566 bool CMerkleTx::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs)
genesis 567 {
genesis 568 if (fClient)
genesis 569 {
genesis 570 if (!IsInMainChain() && !ClientConnectInputs())
genesis 571 return false;
genesis 572 return CTransaction::AcceptToMemoryPool(txdb, false);
genesis 573 }
genesis 574 else
genesis 575 {
genesis 576 return CTransaction::AcceptToMemoryPool(txdb, fCheckInputs);
genesis 577 }
genesis 578 }
genesis 579
genesis 580 bool CMerkleTx::AcceptToMemoryPool()
genesis 581 {
genesis 582 CTxDB txdb("r");
genesis 583 return AcceptToMemoryPool(txdb);
genesis 584 }
genesis 585
genesis 586
genesis 587
genesis 588 bool CWalletTx::AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs)
genesis 589 {
genesis 590 CRITICAL_BLOCK(cs_mapTransactions)
genesis 591 {
genesis 592 // Add previous supporting transactions first
genesis 593 BOOST_FOREACH(CMerkleTx& tx, vtxPrev)
genesis 594 {
genesis 595 if (!tx.IsCoinBase())
genesis 596 {
genesis 597 uint256 hash = tx.GetHash();
genesis 598 if (!mapTransactions.count(hash) && !txdb.ContainsTx(hash))
genesis 599 tx.AcceptToMemoryPool(txdb, fCheckInputs);
genesis 600 }
genesis 601 }
genesis 602 return AcceptToMemoryPool(txdb, fCheckInputs);
genesis 603 }
genesis 604 return false;
genesis 605 }
genesis 606
genesis 607 bool CWalletTx::AcceptWalletTransaction()
genesis 608 {
genesis 609 CTxDB txdb("r");
genesis 610 return AcceptWalletTransaction(txdb);
genesis 611 }
genesis 612
genesis 613 int CTxIndex::GetDepthInMainChain() const
genesis 614 {
genesis 615 // Read block header
genesis 616 CBlock block;
genesis 617 if (!block.ReadFromDisk(pos.nFile, pos.nBlockPos, false))
genesis 618 return 0;
genesis 619 // Find the block in the index
genesis 620 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(block.GetHash());
genesis 621 if (mi == mapBlockIndex.end())
genesis 622 return 0;
genesis 623 CBlockIndex* pindex = (*mi).second;
genesis 624 if (!pindex || !pindex->IsInMainChain())
genesis 625 return 0;
genesis 626 return 1 + nBestHeight - pindex->nHeight;
genesis 627 }
genesis 628
genesis 629
genesis 630
genesis 631
genesis 632
genesis 633
genesis 634
genesis 635
genesis 636
genesis 637
genesis 638 //////////////////////////////////////////////////////////////////////////////
genesis 639 //
genesis 640 // CBlock and CBlockIndex
genesis 641 //
genesis 642
genesis 643 bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
genesis 644 {
genesis 645 if (!fReadTransactions)
genesis 646 {
genesis 647 *this = pindex->GetBlockHeader();
genesis 648 return true;
genesis 649 }
genesis 650 if (!ReadFromDisk(pindex->nFile, pindex->nBlockPos, fReadTransactions))
genesis 651 return false;
genesis 652 if (GetHash() != pindex->GetBlockHash())
genesis 653 return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
genesis 654 return true;
genesis 655 }
genesis 656
genesis 657 uint256 static GetOrphanRoot(const CBlock* pblock)
genesis 658 {
genesis 659 // Work back to the first block in the orphan chain
genesis 660 while (mapOrphanBlocks.count(pblock->hashPrevBlock))
genesis 661 pblock = mapOrphanBlocks[pblock->hashPrevBlock];
genesis 662 return pblock->GetHash();
genesis 663 }
genesis 664
genesis 665 int64 static GetBlockValue(int nHeight, int64 nFees)
genesis 666 {
genesis 667 int64 nSubsidy = 50 * COIN;
genesis 668
genesis 669 // Subsidy is cut in half every 4 years
genesis 670 nSubsidy >>= (nHeight / 210000);
genesis 671
genesis 672 return nSubsidy + nFees;
genesis 673 }
genesis 674
genesis 675 static const int64 nTargetTimespan = 14 * 24 * 60 * 60; // two weeks
genesis 676 static const int64 nTargetSpacing = 10 * 60;
genesis 677 static const int64 nInterval = nTargetTimespan / nTargetSpacing;
genesis 678
genesis 679 //
genesis 680 // minimum amount of work that could possibly be required nTime after
genesis 681 // minimum work required was nBase
genesis 682 //
genesis 683 unsigned int ComputeMinWork(unsigned int nBase, int64 nTime)
genesis 684 {
genesis 685 // Testnet has min-difficulty blocks
genesis 686 // after nTargetSpacing*2 time between blocks:
genesis 687 if (fTestNet && nTime > nTargetSpacing*2)
genesis 688 return bnProofOfWorkLimit.GetCompact();
genesis 689
genesis 690 CBigNum bnResult;
genesis 691 bnResult.SetCompact(nBase);
genesis 692 while (nTime > 0 && bnResult < bnProofOfWorkLimit)
genesis 693 {
genesis 694 // Maximum 400% adjustment...
genesis 695 bnResult *= 4;
genesis 696 // ... in best-case exactly 4-times-normal target time
genesis 697 nTime -= nTargetTimespan*4;
genesis 698 }
genesis 699 if (bnResult > bnProofOfWorkLimit)
genesis 700 bnResult = bnProofOfWorkLimit;
genesis 701 return bnResult.GetCompact();
genesis 702 }
genesis 703
genesis 704 unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlock *pblock)
genesis 705 {
genesis 706 unsigned int nProofOfWorkLimit = bnProofOfWorkLimit.GetCompact();
genesis 707
genesis 708 // Genesis block
genesis 709 if (pindexLast == NULL)
genesis 710 return nProofOfWorkLimit;
genesis 711
genesis 712 // Only change once per interval
genesis 713 if ((pindexLast->nHeight+1) % nInterval != 0)
genesis 714 {
genesis 715 // Special rules for testnet after 15 Feb 2012:
genesis 716 if (fTestNet && pblock->nTime > 1329264000)
genesis 717 {
genesis 718 // If the new block's timestamp is more than 2* 10 minutes
genesis 719 // then allow mining of a min-difficulty block.
genesis 720 if (pblock->nTime - pindexLast->nTime > nTargetSpacing*2)
genesis 721 return nProofOfWorkLimit;
genesis 722 else
genesis 723 {
genesis 724 // Return the last non-special-min-difficulty-rules-block
genesis 725 const CBlockIndex* pindex = pindexLast;
genesis 726 while (pindex->pprev && pindex->nHeight % nInterval != 0 && pindex->nBits == nProofOfWorkLimit)
genesis 727 pindex = pindex->pprev;
genesis 728 return pindex->nBits;
genesis 729 }
genesis 730 }
genesis 731
genesis 732 return pindexLast->nBits;
genesis 733 }
genesis 734
genesis 735 // Go back by what we want to be 14 days worth of blocks
genesis 736 const CBlockIndex* pindexFirst = pindexLast;
genesis 737 for (int i = 0; pindexFirst && i < nInterval-1; i++)
genesis 738 pindexFirst = pindexFirst->pprev;
genesis 739 assert(pindexFirst);
genesis 740
genesis 741 // Limit adjustment step
genesis 742 int64 nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime();
genesis 743 printf(" nActualTimespan = %"PRI64d" before bounds\n", nActualTimespan);
genesis 744 if (nActualTimespan < nTargetTimespan/4)
genesis 745 nActualTimespan = nTargetTimespan/4;
genesis 746 if (nActualTimespan > nTargetTimespan*4)
genesis 747 nActualTimespan = nTargetTimespan*4;
genesis 748
genesis 749 // Retarget
genesis 750 CBigNum bnNew;
genesis 751 bnNew.SetCompact(pindexLast->nBits);
genesis 752 bnNew *= nActualTimespan;
genesis 753 bnNew /= nTargetTimespan;
genesis 754
genesis 755 if (bnNew > bnProofOfWorkLimit)
genesis 756 bnNew = bnProofOfWorkLimit;
genesis 757
genesis 758 /// debug print
genesis 759 printf("GetNextWorkRequired RETARGET\n");
genesis 760 printf("nTargetTimespan = %"PRI64d" nActualTimespan = %"PRI64d"\n", nTargetTimespan, nActualTimespan);
genesis 761 printf("Before: %08x %s\n", pindexLast->nBits, CBigNum().SetCompact(pindexLast->nBits).getuint256().ToString().c_str());
genesis 762 printf("After: %08x %s\n", bnNew.GetCompact(), bnNew.getuint256().ToString().c_str());
genesis 763
genesis 764 return bnNew.GetCompact();
genesis 765 }
genesis 766
genesis 767 bool CheckProofOfWork(uint256 hash, unsigned int nBits)
genesis 768 {
genesis 769 CBigNum bnTarget;
genesis 770 bnTarget.SetCompact(nBits);
genesis 771
genesis 772 // Check range
genesis 773 if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
genesis 774 return error("CheckProofOfWork() : nBits below minimum work");
genesis 775
genesis 776 // Check proof of work matches claimed amount
genesis 777 if (hash > bnTarget.getuint256())
genesis 778 return error("CheckProofOfWork() : hash doesn't match nBits");
genesis 779
genesis 780 return true;
genesis 781 }
genesis 782
genesis 783 // Return maximum amount of blocks that other nodes claim to have
genesis 784 int GetNumBlocksOfPeers()
genesis 785 {
genesis 786 return std::max(cPeerBlockCounts.median(), Checkpoints::GetTotalBlocksEstimate());
genesis 787 }
genesis 788
genesis 789 bool IsInitialBlockDownload()
genesis 790 {
genesis 791 if (pindexBest == NULL || nBestHeight < Checkpoints::GetTotalBlocksEstimate())
genesis 792 return true;
genesis 793 static int64 nLastUpdate;
genesis 794 static CBlockIndex* pindexLastBest;
genesis 795 if (pindexBest != pindexLastBest)
genesis 796 {
genesis 797 pindexLastBest = pindexBest;
genesis 798 nLastUpdate = GetTime();
genesis 799 }
genesis 800 return (GetTime() - nLastUpdate < 10 &&
genesis 801 pindexBest->GetBlockTime() < GetTime() - 24 * 60 * 60);
genesis 802 }
genesis 803
genesis 804 void static InvalidChainFound(CBlockIndex* pindexNew)
genesis 805 {
genesis 806 if (pindexNew->bnChainWork > bnBestInvalidWork)
genesis 807 {
genesis 808 bnBestInvalidWork = pindexNew->bnChainWork;
genesis 809 CTxDB().WriteBestInvalidWork(bnBestInvalidWork);
genesis 810 MainFrameRepaint();
genesis 811 }
genesis 812 printf("InvalidChainFound: invalid block=%s height=%d work=%s\n", pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight, pindexNew->bnChainWork.ToString().c_str());
genesis 813 printf("InvalidChainFound: current best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
genesis 814 if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
genesis 815 printf("InvalidChainFound: WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.\n");
genesis 816 }
genesis 817
genesis 818
genesis 819
genesis 820
genesis 821
genesis 822
genesis 823
genesis 824
genesis 825
genesis 826
genesis 827
genesis 828 bool CTransaction::DisconnectInputs(CTxDB& txdb)
genesis 829 {
genesis 830 // Relinquish previous transactions' spent pointers
genesis 831 if (!IsCoinBase())
genesis 832 {
genesis 833 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 834 {
genesis 835 COutPoint prevout = txin.prevout;
genesis 836
genesis 837 // Get prev txindex from disk
genesis 838 CTxIndex txindex;
genesis 839 if (!txdb.ReadTxIndex(prevout.hash, txindex))
genesis 840 return error("DisconnectInputs() : ReadTxIndex failed");
genesis 841
genesis 842 if (prevout.n >= txindex.vSpent.size())
genesis 843 return error("DisconnectInputs() : prevout.n out of range");
genesis 844
genesis 845 // Mark outpoint as not spent
genesis 846 txindex.vSpent[prevout.n].SetNull();
genesis 847
genesis 848 // Write back
genesis 849 if (!txdb.UpdateTxIndex(prevout.hash, txindex))
genesis 850 return error("DisconnectInputs() : UpdateTxIndex failed");
genesis 851 }
genesis 852 }
genesis 853
genesis 854 // Remove transaction from index
genesis 855 // This can fail if a duplicate of this transaction was in a chain that got
genesis 856 // reorganized away. This is only possible if this transaction was completely
genesis 857 // spent, so erasing it would be a no-op anway.
genesis 858 txdb.EraseTxIndex(*this);
genesis 859
genesis 860 return true;
genesis 861 }
genesis 862
genesis 863
genesis 864 bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx,
genesis 865 CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee,
genesis 866 bool& fInvalid)
genesis 867 {
genesis 868 // FetchInputs can return false either because we just haven't seen some inputs
genesis 869 // (in which case the transaction should be stored as an orphan)
genesis 870 // or because the transaction is malformed (in which case the transaction should
genesis 871 // be dropped). If tx is definitely invalid, fInvalid will be set to true.
genesis 872 fInvalid = false;
genesis 873
genesis 874 // Take over previous transactions' spent pointers
genesis 875 // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
genesis 876 // fMiner is true when called from the internal bitcoin miner
genesis 877 // ... both are false when called from CTransaction::AcceptToMemoryPool
genesis 878 if (!IsCoinBase())
genesis 879 {
genesis 880 int64 nValueIn = 0;
genesis 881 for (int i = 0; i < vin.size(); i++)
genesis 882 {
genesis 883 COutPoint prevout = vin[i].prevout;
genesis 884
genesis 885 // Read txindex
genesis 886 CTxIndex txindex;
genesis 887 bool fFound = true;
genesis 888 if ((fBlock || fMiner) && mapTestPool.count(prevout.hash))
genesis 889 {
genesis 890 // Get txindex from current proposed changes
genesis 891 txindex = mapTestPool[prevout.hash];
genesis 892 }
genesis 893 else
genesis 894 {
genesis 895 // Read txindex from txdb
genesis 896 fFound = txdb.ReadTxIndex(prevout.hash, txindex);
genesis 897 }
genesis 898 if (!fFound && (fBlock || fMiner))
genesis 899 return fMiner ? false : error("ConnectInputs() : %s prev tx %s index entry not found", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
genesis 900
genesis 901 // Read txPrev
genesis 902 CTransaction txPrev;
genesis 903 if (!fFound || txindex.pos == CDiskTxPos(1,1,1))
genesis 904 {
genesis 905 // Get prev tx from single transactions in memory
genesis 906 CRITICAL_BLOCK(cs_mapTransactions)
genesis 907 {
genesis 908 if (!mapTransactions.count(prevout.hash))
genesis 909 return error("ConnectInputs() : %s mapTransactions prev not found %s", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
genesis 910 txPrev = mapTransactions[prevout.hash];
genesis 911 }
genesis 912 if (!fFound)
genesis 913 txindex.vSpent.resize(txPrev.vout.size());
genesis 914 }
genesis 915 else
genesis 916 {
genesis 917 // Get prev tx from disk
genesis 918 if (!txPrev.ReadFromDisk(txindex.pos))
genesis 919 return error("ConnectInputs() : %s ReadFromDisk prev tx %s failed", GetHash().ToString().substr(0,10).c_str(), prevout.hash.ToString().substr(0,10).c_str());
genesis 920 }
genesis 921
genesis 922 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
genesis 923 {
genesis 924 // Revisit this if/when transaction replacement is implemented and allows
genesis 925 // adding inputs:
genesis 926 fInvalid = true;
genesis 927 return DoS(100, error("ConnectInputs() : %s prevout.n out of range %d %d %d prev tx %s\n%s", GetHash().ToString().substr(0,10).c_str(), prevout.n, txPrev.vout.size(), txindex.vSpent.size(), prevout.hash.ToString().substr(0,10).c_str(), txPrev.ToString().c_str()));
genesis 928 }
genesis 929
genesis 930 // If prev is coinbase, check that it's matured
genesis 931 if (txPrev.IsCoinBase())
genesis 932 for (CBlockIndex* pindex = pindexBlock; pindex && pindexBlock->nHeight - pindex->nHeight < COINBASE_MATURITY; pindex = pindex->pprev)
genesis 933 if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
genesis 934 return error("ConnectInputs() : tried to spend coinbase at depth %d", pindexBlock->nHeight - pindex->nHeight);
genesis 935
genesis 936 // Skip ECDSA signature verification when connecting blocks (fBlock=true)
genesis 937 // before the last blockchain checkpoint. This is safe because block merkle hashes are
genesis 938 // still computed and checked, and any change will be caught at the next checkpoint.
genesis 939 if (!(fBlock && (nBestHeight < Checkpoints::GetTotalBlocksEstimate())))
genesis 940 // Verify signature
genesis 941 if (!VerifySignature(txPrev, *this, i))
genesis 942 return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
genesis 943
genesis 944 // Check for conflicts (double-spend)
genesis 945 // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
genesis 946 // for an attacker to attempt to split the network.
genesis 947 if (!txindex.vSpent[prevout.n].IsNull())
genesis 948 return fMiner ? false : error("ConnectInputs() : %s prev tx already used at %s", GetHash().ToString().substr(0,10).c_str(), txindex.vSpent[prevout.n].ToString().c_str());
genesis 949
genesis 950 // Check for negative or overflow input values
genesis 951 nValueIn += txPrev.vout[prevout.n].nValue;
genesis 952 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
genesis 953 return DoS(100, error("ConnectInputs() : txin values out of range"));
genesis 954
genesis 955 // Mark outpoints as spent
genesis 956 txindex.vSpent[prevout.n] = posThisTx;
genesis 957
genesis 958 // Write back
genesis 959 if (fBlock || fMiner)
genesis 960 {
genesis 961 mapTestPool[prevout.hash] = txindex;
genesis 962 }
genesis 963 }
genesis 964
genesis 965 if (nValueIn < GetValueOut())
genesis 966 return DoS(100, error("ConnectInputs() : %s value in < value out", GetHash().ToString().substr(0,10).c_str()));
genesis 967
genesis 968 // Tally transaction fees
genesis 969 int64 nTxFee = nValueIn - GetValueOut();
genesis 970 if (nTxFee < 0)
genesis 971 return DoS(100, error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str()));
genesis 972 if (nTxFee < nMinFee)
genesis 973 return false;
genesis 974 nFees += nTxFee;
genesis 975 if (!MoneyRange(nFees))
genesis 976 return DoS(100, error("ConnectInputs() : nFees out of range"));
genesis 977 }
genesis 978
genesis 979 if (fBlock)
genesis 980 {
genesis 981 // Add transaction to changes
genesis 982 mapTestPool[GetHash()] = CTxIndex(posThisTx, vout.size());
genesis 983 }
genesis 984 else if (fMiner)
genesis 985 {
genesis 986 // Add transaction to test pool
genesis 987 mapTestPool[GetHash()] = CTxIndex(CDiskTxPos(1,1,1), vout.size());
genesis 988 }
genesis 989
genesis 990 return true;
genesis 991 }
genesis 992
genesis 993
genesis 994 bool CTransaction::ClientConnectInputs()
genesis 995 {
genesis 996 if (IsCoinBase())
genesis 997 return false;
genesis 998
genesis 999 // Take over previous transactions' spent pointers
genesis 1000 CRITICAL_BLOCK(cs_mapTransactions)
genesis 1001 {
genesis 1002 int64 nValueIn = 0;
genesis 1003 for (int i = 0; i < vin.size(); i++)
genesis 1004 {
genesis 1005 // Get prev tx from single transactions in memory
genesis 1006 COutPoint prevout = vin[i].prevout;
genesis 1007 if (!mapTransactions.count(prevout.hash))
genesis 1008 return false;
genesis 1009 CTransaction& txPrev = mapTransactions[prevout.hash];
genesis 1010
genesis 1011 if (prevout.n >= txPrev.vout.size())
genesis 1012 return false;
genesis 1013
genesis 1014 // Verify signature
genesis 1015 if (!VerifySignature(txPrev, *this, i))
genesis 1016 return error("ConnectInputs() : VerifySignature failed");
genesis 1017
genesis 1018 ///// this is redundant with the mapNextTx stuff, not sure which I want to get rid of
genesis 1019 ///// this has to go away now that posNext is gone
genesis 1020 // // Check for conflicts
genesis 1021 // if (!txPrev.vout[prevout.n].posNext.IsNull())
genesis 1022 // return error("ConnectInputs() : prev tx already used");
genesis 1023 //
genesis 1024 // // Flag outpoints as used
genesis 1025 // txPrev.vout[prevout.n].posNext = posThisTx;
genesis 1026
genesis 1027 nValueIn += txPrev.vout[prevout.n].nValue;
genesis 1028
genesis 1029 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
genesis 1030 return error("ClientConnectInputs() : txin values out of range");
genesis 1031 }
genesis 1032 if (GetValueOut() > nValueIn)
genesis 1033 return false;
genesis 1034 }
genesis 1035
genesis 1036 return true;
genesis 1037 }
genesis 1038
genesis 1039
genesis 1040
genesis 1041
genesis 1042 bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
genesis 1043 {
genesis 1044 // Disconnect in reverse order
genesis 1045 for (int i = vtx.size()-1; i >= 0; i--)
genesis 1046 if (!vtx[i].DisconnectInputs(txdb))
genesis 1047 return false;
genesis 1048
genesis 1049 // Update block index on disk without changing it in memory.
genesis 1050 // The memory index structure will be changed after the db commits.
genesis 1051 if (pindex->pprev)
genesis 1052 {
genesis 1053 CDiskBlockIndex blockindexPrev(pindex->pprev);
genesis 1054 blockindexPrev.hashNext = 0;
genesis 1055 if (!txdb.WriteBlockIndex(blockindexPrev))
genesis 1056 return error("DisconnectBlock() : WriteBlockIndex failed");
genesis 1057 }
genesis 1058
genesis 1059 return true;
genesis 1060 }
genesis 1061
genesis 1062 bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
genesis 1063 {
genesis 1064 // Check it again in case a previous version let a bad block in
genesis 1065 if (!CheckBlock())
genesis 1066 return false;
genesis 1067
genesis 1068 // Do not allow blocks that contain transactions which 'overwrite' older transactions,
genesis 1069 // unless those are already completely spent.
genesis 1070 // If such overwrites are allowed, coinbases and transactions depending upon those
genesis 1071 // can be duplicated to remove the ability to spend the first instance -- even after
genesis 1072 // being sent to another address.
genesis 1073 // See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
genesis 1074 // This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
genesis 1075 // already refuses previously-known transaction id's entirely.
genesis 1076 // This rule applies to all blocks whose timestamp is after March 15, 2012, 0:00 UTC.
genesis 1077 // On testnet it is enabled as of februari 20, 2012, 0:00 UTC.
genesis 1078 if (pindex->nTime > 1331769600 || (fTestNet && pindex->nTime > 1329696000))
genesis 1079 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 1080 {
genesis 1081 CTxIndex txindexOld;
genesis 1082 if (txdb.ReadTxIndex(tx.GetHash(), txindexOld))
genesis 1083 BOOST_FOREACH(CDiskTxPos &pos, txindexOld.vSpent)
genesis 1084 if (pos.IsNull())
genesis 1085 return false;
genesis 1086 }
genesis 1087
genesis 1088 //// issue here: it doesn't know the version
genesis 1089 unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - 1 + GetSizeOfCompactSize(vtx.size());
genesis 1090
genesis 1091 map<uint256, CTxIndex> mapQueuedChanges;
genesis 1092 int64 nFees = 0;
genesis 1093 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 1094 {
genesis 1095 CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
genesis 1096 nTxPos += ::GetSerializeSize(tx, SER_DISK);
genesis 1097
genesis 1098 bool fInvalid;
genesis 1099 if (!tx.ConnectInputs(txdb, mapQueuedChanges, posThisTx, pindex, nFees, true, false, 0, fInvalid))
genesis 1100 return false;
genesis 1101 }
genesis 1102 // Write queued txindex changes
genesis 1103 for (map<uint256, CTxIndex>::iterator mi = mapQueuedChanges.begin(); mi != mapQueuedChanges.end(); ++mi)
genesis 1104 {
genesis 1105 if (!txdb.UpdateTxIndex((*mi).first, (*mi).second))
genesis 1106 return error("ConnectBlock() : UpdateTxIndex failed");
genesis 1107 }
genesis 1108
genesis 1109 if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
genesis 1110 return false;
genesis 1111
genesis 1112 // Update block index on disk without changing it in memory.
genesis 1113 // The memory index structure will be changed after the db commits.
genesis 1114 if (pindex->pprev)
genesis 1115 {
genesis 1116 CDiskBlockIndex blockindexPrev(pindex->pprev);
genesis 1117 blockindexPrev.hashNext = pindex->GetBlockHash();
genesis 1118 if (!txdb.WriteBlockIndex(blockindexPrev))
genesis 1119 return error("ConnectBlock() : WriteBlockIndex failed");
genesis 1120 }
genesis 1121
genesis 1122 // Watch for transactions paying to me
genesis 1123 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 1124 SyncWithWallets(tx, this, true);
genesis 1125
genesis 1126 return true;
genesis 1127 }
genesis 1128
genesis 1129 bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
genesis 1130 {
genesis 1131 printf("REORGANIZE\n");
genesis 1132
genesis 1133 // Find the fork
genesis 1134 CBlockIndex* pfork = pindexBest;
genesis 1135 CBlockIndex* plonger = pindexNew;
genesis 1136 while (pfork != plonger)
genesis 1137 {
genesis 1138 while (plonger->nHeight > pfork->nHeight)
genesis 1139 if (!(plonger = plonger->pprev))
genesis 1140 return error("Reorganize() : plonger->pprev is null");
genesis 1141 if (pfork == plonger)
genesis 1142 break;
genesis 1143 if (!(pfork = pfork->pprev))
genesis 1144 return error("Reorganize() : pfork->pprev is null");
genesis 1145 }
genesis 1146
genesis 1147 // List of what to disconnect
genesis 1148 vector<CBlockIndex*> vDisconnect;
genesis 1149 for (CBlockIndex* pindex = pindexBest; pindex != pfork; pindex = pindex->pprev)
genesis 1150 vDisconnect.push_back(pindex);
genesis 1151
genesis 1152 // List of what to connect
genesis 1153 vector<CBlockIndex*> vConnect;
genesis 1154 for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
genesis 1155 vConnect.push_back(pindex);
genesis 1156 reverse(vConnect.begin(), vConnect.end());
genesis 1157
genesis 1158 // Disconnect shorter branch
genesis 1159 vector<CTransaction> vResurrect;
genesis 1160 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
genesis 1161 {
genesis 1162 CBlock block;
genesis 1163 if (!block.ReadFromDisk(pindex))
genesis 1164 return error("Reorganize() : ReadFromDisk for disconnect failed");
genesis 1165 if (!block.DisconnectBlock(txdb, pindex))
genesis 1166 return error("Reorganize() : DisconnectBlock failed");
genesis 1167
genesis 1168 // Queue memory transactions to resurrect
genesis 1169 BOOST_FOREACH(const CTransaction& tx, block.vtx)
genesis 1170 if (!tx.IsCoinBase())
genesis 1171 vResurrect.push_back(tx);
genesis 1172 }
genesis 1173
genesis 1174 // Connect longer branch
genesis 1175 vector<CTransaction> vDelete;
genesis 1176 for (int i = 0; i < vConnect.size(); i++)
genesis 1177 {
genesis 1178 CBlockIndex* pindex = vConnect[i];
genesis 1179 CBlock block;
genesis 1180 if (!block.ReadFromDisk(pindex))
genesis 1181 return error("Reorganize() : ReadFromDisk for connect failed");
genesis 1182 if (!block.ConnectBlock(txdb, pindex))
genesis 1183 {
genesis 1184 // Invalid block
genesis 1185 txdb.TxnAbort();
genesis 1186 return error("Reorganize() : ConnectBlock failed");
genesis 1187 }
genesis 1188
genesis 1189 // Queue memory transactions to delete
genesis 1190 BOOST_FOREACH(const CTransaction& tx, block.vtx)
genesis 1191 vDelete.push_back(tx);
genesis 1192 }
genesis 1193 if (!txdb.WriteHashBestChain(pindexNew->GetBlockHash()))
genesis 1194 return error("Reorganize() : WriteHashBestChain failed");
genesis 1195
genesis 1196 // Make sure it's successfully written to disk before changing memory structure
genesis 1197 if (!txdb.TxnCommit())
genesis 1198 return error("Reorganize() : TxnCommit failed");
genesis 1199
genesis 1200 // Disconnect shorter branch
genesis 1201 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
genesis 1202 if (pindex->pprev)
genesis 1203 pindex->pprev->pnext = NULL;
genesis 1204
genesis 1205 // Connect longer branch
genesis 1206 BOOST_FOREACH(CBlockIndex* pindex, vConnect)
genesis 1207 if (pindex->pprev)
genesis 1208 pindex->pprev->pnext = pindex;
genesis 1209
genesis 1210 // Resurrect memory transactions that were in the disconnected branch
genesis 1211 BOOST_FOREACH(CTransaction& tx, vResurrect)
genesis 1212 tx.AcceptToMemoryPool(txdb, false);
genesis 1213
genesis 1214 // Delete redundant memory transactions that are in the connected branch
genesis 1215 BOOST_FOREACH(CTransaction& tx, vDelete)
genesis 1216 tx.RemoveFromMemoryPool();
genesis 1217
genesis 1218 return true;
genesis 1219 }
genesis 1220
genesis 1221
genesis 1222 bool CBlock::SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew)
genesis 1223 {
genesis 1224 uint256 hash = GetHash();
genesis 1225
genesis 1226 txdb.TxnBegin();
genesis 1227 if (pindexGenesisBlock == NULL && hash == hashGenesisBlock)
genesis 1228 {
genesis 1229 txdb.WriteHashBestChain(hash);
genesis 1230 if (!txdb.TxnCommit())
genesis 1231 return error("SetBestChain() : TxnCommit failed");
genesis 1232 pindexGenesisBlock = pindexNew;
genesis 1233 }
genesis 1234 else if (hashPrevBlock == hashBestChain)
genesis 1235 {
genesis 1236 // Adding to current best branch
genesis 1237 if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
genesis 1238 {
genesis 1239 txdb.TxnAbort();
genesis 1240 InvalidChainFound(pindexNew);
genesis 1241 return error("SetBestChain() : ConnectBlock failed");
genesis 1242 }
genesis 1243 if (!txdb.TxnCommit())
genesis 1244 return error("SetBestChain() : TxnCommit failed");
genesis 1245
genesis 1246 // Add to current best branch
genesis 1247 pindexNew->pprev->pnext = pindexNew;
genesis 1248
genesis 1249 // Delete redundant memory transactions
genesis 1250 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 1251 tx.RemoveFromMemoryPool();
genesis 1252 }
genesis 1253 else
genesis 1254 {
genesis 1255 // New best branch
genesis 1256 if (!Reorganize(txdb, pindexNew))
genesis 1257 {
genesis 1258 txdb.TxnAbort();
genesis 1259 InvalidChainFound(pindexNew);
genesis 1260 return error("SetBestChain() : Reorganize failed");
genesis 1261 }
genesis 1262 }
genesis 1263
genesis 1264 // Update best block in wallet (so we can detect restored wallets)
genesis 1265 if (!IsInitialBlockDownload())
genesis 1266 {
genesis 1267 const CBlockLocator locator(pindexNew);
genesis 1268 ::SetBestChain(locator);
genesis 1269 }
genesis 1270
genesis 1271 // New best block
genesis 1272 hashBestChain = hash;
genesis 1273 pindexBest = pindexNew;
genesis 1274 nBestHeight = pindexBest->nHeight;
genesis 1275 bnBestChainWork = pindexNew->bnChainWork;
genesis 1276 nTimeBestReceived = GetTime();
genesis 1277 nTransactionsUpdated++;
genesis 1278 printf("SetBestChain: new best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
genesis 1279
genesis 1280 return true;
genesis 1281 }
genesis 1282
genesis 1283
genesis 1284 bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
genesis 1285 {
genesis 1286 // Check for duplicate
genesis 1287 uint256 hash = GetHash();
genesis 1288 if (mapBlockIndex.count(hash))
genesis 1289 return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
genesis 1290
genesis 1291 // Construct new block index object
genesis 1292 CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
genesis 1293 if (!pindexNew)
genesis 1294 return error("AddToBlockIndex() : new CBlockIndex failed");
genesis 1295 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
genesis 1296 pindexNew->phashBlock = &((*mi).first);
genesis 1297 map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
genesis 1298 if (miPrev != mapBlockIndex.end())
genesis 1299 {
genesis 1300 pindexNew->pprev = (*miPrev).second;
genesis 1301 pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
genesis 1302 }
genesis 1303 pindexNew->bnChainWork = (pindexNew->pprev ? pindexNew->pprev->bnChainWork : 0) + pindexNew->GetBlockWork();
genesis 1304
genesis 1305 CTxDB txdb;
genesis 1306 txdb.TxnBegin();
genesis 1307 txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
genesis 1308 if (!txdb.TxnCommit())
genesis 1309 return false;
genesis 1310
genesis 1311 // New best
genesis 1312 if (pindexNew->bnChainWork > bnBestChainWork)
genesis 1313 if (!SetBestChain(txdb, pindexNew))
genesis 1314 return false;
genesis 1315
genesis 1316 txdb.Close();
genesis 1317
genesis 1318 if (pindexNew == pindexBest)
genesis 1319 {
genesis 1320 // Notify UI to display prev block's coinbase if it was ours
genesis 1321 static uint256 hashPrevBestCoinBase;
genesis 1322 UpdatedTransaction(hashPrevBestCoinBase);
genesis 1323 hashPrevBestCoinBase = vtx[0].GetHash();
genesis 1324 }
genesis 1325
genesis 1326 MainFrameRepaint();
genesis 1327 return true;
genesis 1328 }
genesis 1329
genesis 1330
genesis 1331
genesis 1332
genesis 1333 bool CBlock::CheckBlock() const
genesis 1334 {
genesis 1335 // These are checks that are independent of context
genesis 1336 // that can be verified before saving an orphan block.
genesis 1337
genesis 1338 // Size limits
genesis 1339 if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
genesis 1340 return DoS(100, error("CheckBlock() : size limits failed"));
genesis 1341
genesis 1342 // Check proof of work matches claimed amount
genesis 1343 if (!CheckProofOfWork(GetHash(), nBits))
genesis 1344 return DoS(50, error("CheckBlock() : proof of work failed"));
genesis 1345
genesis 1346 // Check timestamp
genesis 1347 if (GetBlockTime() > GetAdjustedTime() + 2 * 60 * 60)
genesis 1348 return error("CheckBlock() : block timestamp too far in the future");
genesis 1349
genesis 1350 // First transaction must be coinbase, the rest must not be
genesis 1351 if (vtx.empty() || !vtx[0].IsCoinBase())
genesis 1352 return DoS(100, error("CheckBlock() : first tx is not coinbase"));
genesis 1353 for (int i = 1; i < vtx.size(); i++)
genesis 1354 if (vtx[i].IsCoinBase())
genesis 1355 return DoS(100, error("CheckBlock() : more than one coinbase"));
genesis 1356
genesis 1357 // Check transactions
genesis 1358 BOOST_FOREACH(const CTransaction& tx, vtx)
genesis 1359 if (!tx.CheckTransaction())
genesis 1360 return DoS(tx.nDoS, error("CheckBlock() : CheckTransaction failed"));
genesis 1361
genesis 1362 // Check that it's not full of nonstandard transactions
genesis 1363 if (GetSigOpCount() > MAX_BLOCK_SIGOPS)
genesis 1364 return DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"));
genesis 1365
genesis 1366 // Check merkleroot
genesis 1367 if (hashMerkleRoot != BuildMerkleTree())
genesis 1368 return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
genesis 1369
genesis 1370 return true;
genesis 1371 }
genesis 1372
genesis 1373 bool CBlock::AcceptBlock()
genesis 1374 {
genesis 1375 // Check for duplicate
genesis 1376 uint256 hash = GetHash();
genesis 1377 if (mapBlockIndex.count(hash))
genesis 1378 return error("AcceptBlock() : block already in mapBlockIndex");
genesis 1379
genesis 1380 // Get prev block index
genesis 1381 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
genesis 1382 if (mi == mapBlockIndex.end())
genesis 1383 return DoS(10, error("AcceptBlock() : prev block not found"));
genesis 1384 CBlockIndex* pindexPrev = (*mi).second;
genesis 1385 int nHeight = pindexPrev->nHeight+1;
genesis 1386
genesis 1387 // Check proof of work
genesis 1388 if (nBits != GetNextWorkRequired(pindexPrev, this))
genesis 1389 return DoS(100, error("AcceptBlock() : incorrect proof of work"));
genesis 1390
genesis 1391 // Check timestamp against prev
genesis 1392 if (GetBlockTime() <= pindexPrev->GetMedianTimePast())
genesis 1393 return error("AcceptBlock() : block's timestamp is too early");
genesis 1394
genesis 1395 // Check that all transactions are finalized
genesis 1396 BOOST_FOREACH(const CTransaction& tx, vtx)
genesis 1397 if (!tx.IsFinal(nHeight, GetBlockTime()))
genesis 1398 return DoS(10, error("AcceptBlock() : contains a non-final transaction"));
genesis 1399
genesis 1400 // Check that the block chain matches the known block chain up to a checkpoint
genesis 1401 if (!Checkpoints::CheckBlock(nHeight, hash))
genesis 1402 return DoS(100, error("AcceptBlock() : rejected by checkpoint lockin at %d", nHeight));
genesis 1403
genesis 1404 // Write block to history file
genesis 1405 if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK)))
genesis 1406 return error("AcceptBlock() : out of disk space");
genesis 1407 unsigned int nFile = -1;
genesis 1408 unsigned int nBlockPos = 0;
genesis 1409 if (!WriteToDisk(nFile, nBlockPos))
genesis 1410 return error("AcceptBlock() : WriteToDisk failed");
genesis 1411 if (!AddToBlockIndex(nFile, nBlockPos))
genesis 1412 return error("AcceptBlock() : AddToBlockIndex failed");
genesis 1413
genesis 1414 // Relay inventory, but don't relay old inventory during initial block download
genesis 1415 if (hashBestChain == hash)
genesis 1416 CRITICAL_BLOCK(cs_vNodes)
genesis 1417 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 1418 if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 140700))
genesis 1419 pnode->PushInventory(CInv(MSG_BLOCK, hash));
genesis 1420
genesis 1421 return true;
genesis 1422 }
genesis 1423
genesis 1424 bool ProcessBlock(CNode* pfrom, CBlock* pblock)
genesis 1425 {
genesis 1426 // Check for duplicate
genesis 1427 uint256 hash = pblock->GetHash();
genesis 1428 if (mapBlockIndex.count(hash))
genesis 1429 return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,20).c_str());
genesis 1430 if (mapOrphanBlocks.count(hash))
genesis 1431 return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,20).c_str());
genesis 1432
genesis 1433 // Preliminary checks
genesis 1434 if (!pblock->CheckBlock())
genesis 1435 return error("ProcessBlock() : CheckBlock FAILED");
genesis 1436
genesis 1437 CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
genesis 1438 if (pcheckpoint && pblock->hashPrevBlock != hashBestChain)
genesis 1439 {
genesis 1440 // Extra checks to prevent "fill up memory by spamming with bogus blocks"
genesis 1441 int64 deltaTime = pblock->GetBlockTime() - pcheckpoint->nTime;
genesis 1442 if (deltaTime < 0)
genesis 1443 {
genesis 1444 if (pfrom)
genesis 1445 pfrom->Misbehaving(100);
genesis 1446 return error("ProcessBlock() : block with timestamp before last checkpoint");
genesis 1447 }
genesis 1448 CBigNum bnNewBlock;
genesis 1449 bnNewBlock.SetCompact(pblock->nBits);
genesis 1450 CBigNum bnRequired;
genesis 1451 bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime));
genesis 1452 if (bnNewBlock > bnRequired)
genesis 1453 {
genesis 1454 if (pfrom)
genesis 1455 pfrom->Misbehaving(100);
genesis 1456 return error("ProcessBlock() : block with too little proof-of-work");
genesis 1457 }
genesis 1458 }
genesis 1459
genesis 1460
genesis 1461 // If don't already have its previous block, shunt it off to holding area until we get it
genesis 1462 if (!mapBlockIndex.count(pblock->hashPrevBlock))
genesis 1463 {
genesis 1464 printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
genesis 1465 CBlock* pblock2 = new CBlock(*pblock);
genesis 1466 mapOrphanBlocks.insert(make_pair(hash, pblock2));
genesis 1467 mapOrphanBlocksByPrev.insert(make_pair(pblock2->hashPrevBlock, pblock2));
genesis 1468
genesis 1469 // Ask this guy to fill in what we're missing
genesis 1470 if (pfrom)
genesis 1471 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(pblock2));
genesis 1472 return true;
genesis 1473 }
genesis 1474
genesis 1475 // Store to disk
genesis 1476 if (!pblock->AcceptBlock())
genesis 1477 return error("ProcessBlock() : AcceptBlock FAILED");
genesis 1478
genesis 1479 // Recursively process any orphan blocks that depended on this one
genesis 1480 vector<uint256> vWorkQueue;
genesis 1481 vWorkQueue.push_back(hash);
genesis 1482 for (int i = 0; i < vWorkQueue.size(); i++)
genesis 1483 {
genesis 1484 uint256 hashPrev = vWorkQueue[i];
genesis 1485 for (multimap<uint256, CBlock*>::iterator mi = mapOrphanBlocksByPrev.lower_bound(hashPrev);
genesis 1486 mi != mapOrphanBlocksByPrev.upper_bound(hashPrev);
genesis 1487 ++mi)
genesis 1488 {
genesis 1489 CBlock* pblockOrphan = (*mi).second;
genesis 1490 if (pblockOrphan->AcceptBlock())
genesis 1491 vWorkQueue.push_back(pblockOrphan->GetHash());
genesis 1492 mapOrphanBlocks.erase(pblockOrphan->GetHash());
genesis 1493 delete pblockOrphan;
genesis 1494 }
genesis 1495 mapOrphanBlocksByPrev.erase(hashPrev);
genesis 1496 }
genesis 1497
genesis 1498 printf("ProcessBlock: ACCEPTED\n");
genesis 1499 return true;
genesis 1500 }
genesis 1501
genesis 1502
genesis 1503
genesis 1504
genesis 1505
genesis 1506
genesis 1507
genesis 1508
genesis 1509 bool CheckDiskSpace(uint64 nAdditionalBytes)
genesis 1510 {
genesis 1511 uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
genesis 1512
genesis 1513 // Check for 15MB because database could create another 10MB log file at any time
genesis 1514 if (nFreeBytesAvailable < (uint64)15000000 + nAdditionalBytes)
genesis 1515 {
genesis 1516 fShutdown = true;
genesis 1517 string strMessage = _("Warning: Disk space is low ");
genesis 1518 strMiscWarning = strMessage;
genesis 1519 printf("*** %s\n", strMessage.c_str());
genesis 1520 ThreadSafeMessageBox(strMessage, "Bitcoin", wxOK | wxICON_EXCLAMATION);
genesis 1521 CreateThread(Shutdown, NULL);
genesis 1522 return false;
genesis 1523 }
genesis 1524 return true;
genesis 1525 }
genesis 1526
genesis 1527 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
genesis 1528 {
genesis 1529 if (nFile == -1)
genesis 1530 return NULL;
genesis 1531 FILE* file = fopen(strprintf("%s/blk%04d.dat", GetDataDir().c_str(), nFile).c_str(), pszMode);
genesis 1532 if (!file)
genesis 1533 return NULL;
genesis 1534 if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))
genesis 1535 {
genesis 1536 if (fseek(file, nBlockPos, SEEK_SET) != 0)
genesis 1537 {
genesis 1538 fclose(file);
genesis 1539 return NULL;
genesis 1540 }
genesis 1541 }
genesis 1542 return file;
genesis 1543 }
genesis 1544
genesis 1545 static unsigned int nCurrentBlockFile = 1;
genesis 1546
genesis 1547 FILE* AppendBlockFile(unsigned int& nFileRet)
genesis 1548 {
genesis 1549 nFileRet = 0;
genesis 1550 loop
genesis 1551 {
genesis 1552 FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
genesis 1553 if (!file)
genesis 1554 return NULL;
genesis 1555 if (fseek(file, 0, SEEK_END) != 0)
genesis 1556 return NULL;
genesis 1557 // FAT32 filesize max 4GB, fseek and ftell max 2GB, so we must stay under 2GB
genesis 1558 if (ftell(file) < 0x7F000000 - MAX_SIZE)
genesis 1559 {
genesis 1560 nFileRet = nCurrentBlockFile;
genesis 1561 return file;
genesis 1562 }
genesis 1563 fclose(file);
genesis 1564 nCurrentBlockFile++;
genesis 1565 }
genesis 1566 }
genesis 1567
genesis 1568 bool LoadBlockIndex(bool fAllowNew)
genesis 1569 {
genesis 1570 if (fTestNet)
genesis 1571 {
genesis 1572 hashGenesisBlock = uint256("0x00000007199508e34a9ff81e6ec0c477a4cccff2a4767a8eee39c11db367b008");
genesis 1573 bnProofOfWorkLimit = CBigNum(~uint256(0) >> 28);
genesis 1574 pchMessageStart[0] = 0xfa;
genesis 1575 pchMessageStart[1] = 0xbf;
genesis 1576 pchMessageStart[2] = 0xb5;
genesis 1577 pchMessageStart[3] = 0xda;
genesis 1578 }
genesis 1579
genesis 1580 //
genesis 1581 // Load block index
genesis 1582 //
genesis 1583 CTxDB txdb("cr");
genesis 1584 if (!txdb.LoadBlockIndex())
genesis 1585 return false;
genesis 1586 txdb.Close();
genesis 1587
genesis 1588 //
genesis 1589 // Init with genesis block
genesis 1590 //
genesis 1591 if (mapBlockIndex.empty())
genesis 1592 {
genesis 1593 if (!fAllowNew)
genesis 1594 return false;
genesis 1595
genesis 1596 // Genesis Block:
genesis 1597 // CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
genesis 1598 // CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
genesis 1599 // CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
genesis 1600 // CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
genesis 1601 // vMerkleTree: 4a5e1e
genesis 1602
genesis 1603 // Genesis block
genesis 1604 const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
genesis 1605 CTransaction txNew;
genesis 1606 txNew.vin.resize(1);
genesis 1607 txNew.vout.resize(1);
genesis 1608 txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
genesis 1609 txNew.vout[0].nValue = 50 * COIN;
genesis 1610 txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
genesis 1611 CBlock block;
genesis 1612 block.vtx.push_back(txNew);
genesis 1613 block.hashPrevBlock = 0;
genesis 1614 block.hashMerkleRoot = block.BuildMerkleTree();
genesis 1615 block.nVersion = 1;
genesis 1616 block.nTime = 1231006505;
genesis 1617 block.nBits = 0x1d00ffff;
genesis 1618 block.nNonce = 2083236893;
genesis 1619
genesis 1620 if (fTestNet)
genesis 1621 {
genesis 1622 block.nTime = 1296688602;
genesis 1623 block.nBits = 0x1d07fff8;
genesis 1624 block.nNonce = 384568319;
genesis 1625 }
genesis 1626
genesis 1627 //// debug print
genesis 1628 printf("%s\n", block.GetHash().ToString().c_str());
genesis 1629 printf("%s\n", hashGenesisBlock.ToString().c_str());
genesis 1630 printf("%s\n", block.hashMerkleRoot.ToString().c_str());
genesis 1631 assert(block.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
genesis 1632 block.print();
genesis 1633 assert(block.GetHash() == hashGenesisBlock);
genesis 1634
genesis 1635 // Start new block file
genesis 1636 unsigned int nFile;
genesis 1637 unsigned int nBlockPos;
genesis 1638 if (!block.WriteToDisk(nFile, nBlockPos))
genesis 1639 return error("LoadBlockIndex() : writing genesis block to disk failed");
genesis 1640 if (!block.AddToBlockIndex(nFile, nBlockPos))
genesis 1641 return error("LoadBlockIndex() : genesis block not accepted");
genesis 1642 }
genesis 1643
genesis 1644 return true;
genesis 1645 }
genesis 1646
genesis 1647
genesis 1648
genesis 1649 void PrintBlockTree()
genesis 1650 {
genesis 1651 // precompute tree structure
genesis 1652 map<CBlockIndex*, vector<CBlockIndex*> > mapNext;
genesis 1653 for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
genesis 1654 {
genesis 1655 CBlockIndex* pindex = (*mi).second;
genesis 1656 mapNext[pindex->pprev].push_back(pindex);
genesis 1657 // test
genesis 1658 //while (rand() % 3 == 0)
genesis 1659 // mapNext[pindex->pprev].push_back(pindex);
genesis 1660 }
genesis 1661
genesis 1662 vector<pair<int, CBlockIndex*> > vStack;
genesis 1663 vStack.push_back(make_pair(0, pindexGenesisBlock));
genesis 1664
genesis 1665 int nPrevCol = 0;
genesis 1666 while (!vStack.empty())
genesis 1667 {
genesis 1668 int nCol = vStack.back().first;
genesis 1669 CBlockIndex* pindex = vStack.back().second;
genesis 1670 vStack.pop_back();
genesis 1671
genesis 1672 // print split or gap
genesis 1673 if (nCol > nPrevCol)
genesis 1674 {
genesis 1675 for (int i = 0; i < nCol-1; i++)
genesis 1676 printf("| ");
genesis 1677 printf("|\\\n");
genesis 1678 }
genesis 1679 else if (nCol < nPrevCol)
genesis 1680 {
genesis 1681 for (int i = 0; i < nCol; i++)
genesis 1682 printf("| ");
genesis 1683 printf("|\n");
genesis 1684 }
genesis 1685 nPrevCol = nCol;
genesis 1686
genesis 1687 // print columns
genesis 1688 for (int i = 0; i < nCol; i++)
genesis 1689 printf("| ");
genesis 1690
genesis 1691 // print item
genesis 1692 CBlock block;
genesis 1693 block.ReadFromDisk(pindex);
genesis 1694 printf("%d (%u,%u) %s %s tx %d",
genesis 1695 pindex->nHeight,
genesis 1696 pindex->nFile,
genesis 1697 pindex->nBlockPos,
genesis 1698 block.GetHash().ToString().substr(0,20).c_str(),
genesis 1699 DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
genesis 1700 block.vtx.size());
genesis 1701
genesis 1702 PrintWallets(block);
genesis 1703
genesis 1704 // put the main timechain first
genesis 1705 vector<CBlockIndex*>& vNext = mapNext[pindex];
genesis 1706 for (int i = 0; i < vNext.size(); i++)
genesis 1707 {
genesis 1708 if (vNext[i]->pnext)
genesis 1709 {
genesis 1710 swap(vNext[0], vNext[i]);
genesis 1711 break;
genesis 1712 }
genesis 1713 }
genesis 1714
genesis 1715 // iterate children
genesis 1716 for (int i = 0; i < vNext.size(); i++)
genesis 1717 vStack.push_back(make_pair(nCol+i, vNext[i]));
genesis 1718 }
genesis 1719 }
genesis 1720
genesis 1721
genesis 1722
genesis 1723
genesis 1724
genesis 1725
genesis 1726
genesis 1727
genesis 1728
genesis 1729
genesis 1730 //////////////////////////////////////////////////////////////////////////////
genesis 1731 //
genesis 1732 // CAlert
genesis 1733 //
genesis 1734
genesis 1735 map<uint256, CAlert> mapAlerts;
genesis 1736 CCriticalSection cs_mapAlerts;
genesis 1737
genesis 1738 string GetWarnings(string strFor)
genesis 1739 {
genesis 1740 int nPriority = 0;
genesis 1741 string strStatusBar;
genesis 1742 string strRPC;
genesis 1743 if (GetBoolArg("-testsafemode"))
genesis 1744 strRPC = "test";
genesis 1745
genesis 1746 // Misc warnings like out of disk space and clock is wrong
genesis 1747 if (strMiscWarning != "")
genesis 1748 {
genesis 1749 nPriority = 1000;
genesis 1750 strStatusBar = strMiscWarning;
genesis 1751 }
genesis 1752
genesis 1753 // Longer invalid proof-of-work chain
genesis 1754 if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
genesis 1755 {
genesis 1756 nPriority = 2000;
genesis 1757 strStatusBar = strRPC = "WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.";
genesis 1758 }
genesis 1759
genesis 1760 // Alerts
genesis 1761 CRITICAL_BLOCK(cs_mapAlerts)
genesis 1762 {
genesis 1763 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
genesis 1764 {
genesis 1765 const CAlert& alert = item.second;
genesis 1766 if (alert.AppliesToMe() && alert.nPriority > nPriority)
genesis 1767 {
genesis 1768 nPriority = alert.nPriority;
genesis 1769 strStatusBar = alert.strStatusBar;
genesis 1770 }
genesis 1771 }
genesis 1772 }
genesis 1773
genesis 1774 if (strFor == "statusbar")
genesis 1775 return strStatusBar;
genesis 1776 else if (strFor == "rpc")
genesis 1777 return strRPC;
genesis 1778 assert(!"GetWarnings() : invalid parameter");
genesis 1779 return "error";
genesis 1780 }
genesis 1781
genesis 1782 bool CAlert::ProcessAlert()
genesis 1783 {
genesis 1784 if (!CheckSignature())
genesis 1785 return false;
genesis 1786 if (!IsInEffect())
genesis 1787 return false;
genesis 1788
genesis 1789 CRITICAL_BLOCK(cs_mapAlerts)
genesis 1790 {
genesis 1791 // Cancel previous alerts
genesis 1792 for (map<uint256, CAlert>::iterator mi = mapAlerts.begin(); mi != mapAlerts.end();)
genesis 1793 {
genesis 1794 const CAlert& alert = (*mi).second;
genesis 1795 if (Cancels(alert))
genesis 1796 {
genesis 1797 printf("cancelling alert %d\n", alert.nID);
genesis 1798 mapAlerts.erase(mi++);
genesis 1799 }
genesis 1800 else if (!alert.IsInEffect())
genesis 1801 {
genesis 1802 printf("expiring alert %d\n", alert.nID);
genesis 1803 mapAlerts.erase(mi++);
genesis 1804 }
genesis 1805 else
genesis 1806 mi++;
genesis 1807 }
genesis 1808
genesis 1809 // Check if this alert has been cancelled
genesis 1810 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
genesis 1811 {
genesis 1812 const CAlert& alert = item.second;
genesis 1813 if (alert.Cancels(*this))
genesis 1814 {
genesis 1815 printf("alert already cancelled by %d\n", alert.nID);
genesis 1816 return false;
genesis 1817 }
genesis 1818 }
genesis 1819
genesis 1820 // Add to mapAlerts
genesis 1821 mapAlerts.insert(make_pair(GetHash(), *this));
genesis 1822 }
genesis 1823
genesis 1824 printf("accepted alert %d, AppliesToMe()=%d\n", nID, AppliesToMe());
genesis 1825 MainFrameRepaint();
genesis 1826 return true;
genesis 1827 }
genesis 1828
genesis 1829
genesis 1830
genesis 1831
genesis 1832
genesis 1833
genesis 1834
genesis 1835
genesis 1836 //////////////////////////////////////////////////////////////////////////////
genesis 1837 //
genesis 1838 // Messages
genesis 1839 //
genesis 1840
genesis 1841
genesis 1842 bool static AlreadyHave(CTxDB& txdb, const CInv& inv)
genesis 1843 {
genesis 1844 switch (inv.type)
genesis 1845 {
genesis 1846 case MSG_TX: return mapTransactions.count(inv.hash) || mapOrphanTransactions.count(inv.hash) || txdb.ContainsTx(inv.hash);
genesis 1847 case MSG_BLOCK: return mapBlockIndex.count(inv.hash) || mapOrphanBlocks.count(inv.hash);
genesis 1848 }
genesis 1849 // Don't know what it is, just say we already got one
genesis 1850 return true;
genesis 1851 }
genesis 1852
genesis 1853
genesis 1854
genesis 1855
genesis 1856 // The message start string is designed to be unlikely to occur in normal data.
genesis 1857 // The characters are rarely used upper ascii, not valid as UTF-8, and produce
genesis 1858 // a large 4-byte int at any alignment.
genesis 1859 unsigned char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
genesis 1860
genesis 1861
genesis 1862 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
genesis 1863 {
genesis 1864 static map<unsigned int, vector<unsigned char> > mapReuseKey;
genesis 1865 RandAddSeedPerfmon();
genesis 1866 if (fDebug) {
genesis 1867 printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
genesis 1868 printf("received: %s (%d bytes)\n", strCommand.c_str(), vRecv.size());
genesis 1869 }
genesis 1870 if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
genesis 1871 {
genesis 1872 printf("dropmessagestest DROPPING RECV MESSAGE\n");
genesis 1873 return true;
genesis 1874 }
genesis 1875
genesis 1876
genesis 1877
genesis 1878
genesis 1879
genesis 1880 if (strCommand == "version")
genesis 1881 {
genesis 1882 // Each connection can only send one version message
genesis 1883 if (pfrom->nVersion != 0)
genesis 1884 {
genesis 1885 pfrom->Misbehaving(1);
genesis 1886 return false;
genesis 1887 }
genesis 1888
genesis 1889 int64 nTime;
genesis 1890 CAddress addrMe;
genesis 1891 CAddress addrFrom;
genesis 1892 uint64 nNonce = 1;
genesis 1893 vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
genesis 1894 if (pfrom->nVersion == 10300)
genesis 1895 pfrom->nVersion = 300;
genesis 1896 if (pfrom->nVersion >= 106 && !vRecv.empty())
genesis 1897 vRecv >> addrFrom >> nNonce;
genesis 1898 if (pfrom->nVersion >= 106 && !vRecv.empty())
genesis 1899 vRecv >> pfrom->strSubVer;
genesis 1900 if (pfrom->nVersion >= 209 && !vRecv.empty())
genesis 1901 vRecv >> pfrom->nStartingHeight;
genesis 1902
genesis 1903 if (pfrom->nVersion == 0)
genesis 1904 return false;
genesis 1905
genesis 1906 // Disconnect if we connected to ourself
genesis 1907 if (nNonce == nLocalHostNonce && nNonce > 1)
genesis 1908 {
genesis 1909 printf("connected to self at %s, disconnecting\n", pfrom->addr.ToString().c_str());
genesis 1910 pfrom->fDisconnect = true;
genesis 1911 return true;
genesis 1912 }
genesis 1913
genesis 1914 // Be shy and don't send version until we hear
genesis 1915 if (pfrom->fInbound)
genesis 1916 pfrom->PushVersion();
genesis 1917
genesis 1918 pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
genesis 1919
genesis 1920 AddTimeData(pfrom->addr.ip, nTime);
genesis 1921
genesis 1922 // Change version
genesis 1923 if (pfrom->nVersion >= 209)
genesis 1924 pfrom->PushMessage("verack");
genesis 1925 pfrom->vSend.SetVersion(min(pfrom->nVersion, VERSION));
genesis 1926 if (pfrom->nVersion < 209)
genesis 1927 pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
genesis 1928
genesis 1929 if (!pfrom->fInbound)
genesis 1930 {
genesis 1931 // Advertise our address
genesis 1932 if (addrLocalHost.IsRoutable() && !fUseProxy)
genesis 1933 {
genesis 1934 CAddress addr(addrLocalHost);
genesis 1935 addr.nTime = GetAdjustedTime();
genesis 1936 pfrom->PushAddress(addr);
genesis 1937 }
genesis 1938
genesis 1939 // Get recent addresses
genesis 1940 if (pfrom->nVersion >= 31402 || mapAddresses.size() < 1000)
genesis 1941 {
genesis 1942 pfrom->PushMessage("getaddr");
genesis 1943 pfrom->fGetAddr = true;
genesis 1944 }
genesis 1945 }
genesis 1946
genesis 1947 // Ask the first connected node for block updates
genesis 1948 static int nAskedForBlocks;
genesis 1949 if (!pfrom->fClient &&
genesis 1950 (pfrom->nVersion < 32000 || pfrom->nVersion >= 32400) &&
genesis 1951 (nAskedForBlocks < 1 || vNodes.size() <= 1))
genesis 1952 {
genesis 1953 nAskedForBlocks++;
genesis 1954 pfrom->PushGetBlocks(pindexBest, uint256(0));
genesis 1955 }
genesis 1956
genesis 1957 // Relay alerts
genesis 1958 CRITICAL_BLOCK(cs_mapAlerts)
genesis 1959 BOOST_FOREACH(PAIRTYPE(const uint256, CAlert)& item, mapAlerts)
genesis 1960 item.second.RelayTo(pfrom);
genesis 1961
genesis 1962 pfrom->fSuccessfullyConnected = true;
genesis 1963
genesis 1964 printf("version message: version %d, blocks=%d\n", pfrom->nVersion, pfrom->nStartingHeight);
genesis 1965
genesis 1966 cPeerBlockCounts.input(pfrom->nStartingHeight);
genesis 1967 }
genesis 1968
genesis 1969
genesis 1970 else if (pfrom->nVersion == 0)
genesis 1971 {
genesis 1972 // Must have a version message before anything else
genesis 1973 pfrom->Misbehaving(1);
genesis 1974 return false;
genesis 1975 }
genesis 1976
genesis 1977
genesis 1978 else if (strCommand == "verack")
genesis 1979 {
genesis 1980 pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
genesis 1981 }
genesis 1982
genesis 1983
genesis 1984 else if (strCommand == "addr")
genesis 1985 {
genesis 1986 vector<CAddress> vAddr;
genesis 1987 vRecv >> vAddr;
genesis 1988
genesis 1989 // Don't want addr from older versions unless seeding
genesis 1990 if (pfrom->nVersion < 209)
genesis 1991 return true;
genesis 1992 if (pfrom->nVersion < 31402 && mapAddresses.size() > 1000)
genesis 1993 return true;
genesis 1994 if (vAddr.size() > 1000)
genesis 1995 {
genesis 1996 pfrom->Misbehaving(20);
genesis 1997 return error("message addr size() = %d", vAddr.size());
genesis 1998 }
genesis 1999
genesis 2000 // Store the new addresses
genesis 2001 CAddrDB addrDB;
genesis 2002 addrDB.TxnBegin();
genesis 2003 int64 nNow = GetAdjustedTime();
genesis 2004 int64 nSince = nNow - 10 * 60;
genesis 2005 BOOST_FOREACH(CAddress& addr, vAddr)
genesis 2006 {
genesis 2007 if (fShutdown)
genesis 2008 return true;
genesis 2009 // ignore IPv6 for now, since it isn't implemented anyway
genesis 2010 if (!addr.IsIPv4())
genesis 2011 continue;
genesis 2012 if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
genesis 2013 addr.nTime = nNow - 5 * 24 * 60 * 60;
genesis 2014 AddAddress(addr, 2 * 60 * 60, &addrDB);
genesis 2015 pfrom->AddAddressKnown(addr);
genesis 2016 if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
genesis 2017 {
genesis 2018 // Relay to a limited number of other nodes
genesis 2019 CRITICAL_BLOCK(cs_vNodes)
genesis 2020 {
genesis 2021 // Use deterministic randomness to send to the same nodes for 24 hours
genesis 2022 // at a time so the setAddrKnowns of the chosen nodes prevent repeats
genesis 2023 static uint256 hashSalt;
genesis 2024 if (hashSalt == 0)
genesis 2025 RAND_bytes((unsigned char*)&hashSalt, sizeof(hashSalt));
genesis 2026 uint256 hashRand = hashSalt ^ (((int64)addr.ip)<<32) ^ ((GetTime()+addr.ip)/(24*60*60));
genesis 2027 hashRand = Hash(BEGIN(hashRand), END(hashRand));
genesis 2028 multimap<uint256, CNode*> mapMix;
genesis 2029 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 2030 {
genesis 2031 if (pnode->nVersion < 31402)
genesis 2032 continue;
genesis 2033 unsigned int nPointer;
genesis 2034 memcpy(&nPointer, &pnode, sizeof(nPointer));
genesis 2035 uint256 hashKey = hashRand ^ nPointer;
genesis 2036 hashKey = Hash(BEGIN(hashKey), END(hashKey));
genesis 2037 mapMix.insert(make_pair(hashKey, pnode));
genesis 2038 }
genesis 2039 int nRelayNodes = 2;
genesis 2040 for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
genesis 2041 ((*mi).second)->PushAddress(addr);
genesis 2042 }
genesis 2043 }
genesis 2044 }
genesis 2045 addrDB.TxnCommit(); // Save addresses (it's ok if this fails)
genesis 2046 if (vAddr.size() < 1000)
genesis 2047 pfrom->fGetAddr = false;
genesis 2048 }
genesis 2049
genesis 2050
genesis 2051 else if (strCommand == "inv")
genesis 2052 {
genesis 2053 vector<CInv> vInv;
genesis 2054 vRecv >> vInv;
genesis 2055 if (vInv.size() > 50000)
genesis 2056 {
genesis 2057 pfrom->Misbehaving(20);
genesis 2058 return error("message inv size() = %d", vInv.size());
genesis 2059 }
genesis 2060
genesis 2061 CTxDB txdb("r");
genesis 2062 BOOST_FOREACH(const CInv& inv, vInv)
genesis 2063 {
genesis 2064 if (fShutdown)
genesis 2065 return true;
genesis 2066 pfrom->AddInventoryKnown(inv);
genesis 2067
genesis 2068 bool fAlreadyHave = AlreadyHave(txdb, inv);
genesis 2069 if (fDebug)
genesis 2070 printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
genesis 2071
genesis 2072 if (!fAlreadyHave)
genesis 2073 pfrom->AskFor(inv);
genesis 2074 else if (inv.type == MSG_BLOCK && mapOrphanBlocks.count(inv.hash))
genesis 2075 pfrom->PushGetBlocks(pindexBest, GetOrphanRoot(mapOrphanBlocks[inv.hash]));
genesis 2076
genesis 2077 // Track requests for our stuff
genesis 2078 Inventory(inv.hash);
genesis 2079 }
genesis 2080 }
genesis 2081
genesis 2082
genesis 2083 else if (strCommand == "getdata")
genesis 2084 {
genesis 2085 vector<CInv> vInv;
genesis 2086 vRecv >> vInv;
genesis 2087 if (vInv.size() > 50000)
genesis 2088 {
genesis 2089 pfrom->Misbehaving(20);
genesis 2090 return error("message getdata size() = %d", vInv.size());
genesis 2091 }
genesis 2092
genesis 2093 BOOST_FOREACH(const CInv& inv, vInv)
genesis 2094 {
genesis 2095 if (fShutdown)
genesis 2096 return true;
genesis 2097 printf("received getdata for: %s\n", inv.ToString().c_str());
genesis 2098
genesis 2099 if (inv.type == MSG_BLOCK)
genesis 2100 {
genesis 2101 // Send block from disk
genesis 2102 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(inv.hash);
genesis 2103 if (mi != mapBlockIndex.end())
genesis 2104 {
genesis 2105 CBlock block;
genesis 2106 block.ReadFromDisk((*mi).second);
genesis 2107 pfrom->PushMessage("block", block);
genesis 2108
genesis 2109 // Trigger them to send a getblocks request for the next batch of inventory
genesis 2110 if (inv.hash == pfrom->hashContinue)
genesis 2111 {
genesis 2112 // Bypass PushInventory, this must send even if redundant,
genesis 2113 // and we want it right after the last block so they don't
genesis 2114 // wait for other stuff first.
genesis 2115 vector<CInv> vInv;
genesis 2116 vInv.push_back(CInv(MSG_BLOCK, hashBestChain));
genesis 2117 pfrom->PushMessage("inv", vInv);
genesis 2118 pfrom->hashContinue = 0;
genesis 2119 }
genesis 2120 }
genesis 2121 }
genesis 2122 else if (inv.IsKnownType())
genesis 2123 {
genesis 2124 // Send stream from relay memory
genesis 2125 CRITICAL_BLOCK(cs_mapRelay)
genesis 2126 {
genesis 2127 map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
genesis 2128 if (mi != mapRelay.end())
genesis 2129 pfrom->PushMessage(inv.GetCommand(), (*mi).second);
genesis 2130 }
genesis 2131 }
genesis 2132
genesis 2133 // Track requests for our stuff
genesis 2134 Inventory(inv.hash);
genesis 2135 }
genesis 2136 }
genesis 2137
genesis 2138
genesis 2139 else if (strCommand == "getblocks")
genesis 2140 {
genesis 2141 CBlockLocator locator;
genesis 2142 uint256 hashStop;
genesis 2143 vRecv >> locator >> hashStop;
genesis 2144
genesis 2145 // Find the last block the caller has in the main chain
genesis 2146 CBlockIndex* pindex = locator.GetBlockIndex();
genesis 2147
genesis 2148 // Send the rest of the chain
genesis 2149 if (pindex)
genesis 2150 pindex = pindex->pnext;
genesis 2151 int nLimit = 500 + locator.GetDistanceBack();
genesis 2152 unsigned int nBytes = 0;
genesis 2153 printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
genesis 2154 for (; pindex; pindex = pindex->pnext)
genesis 2155 {
genesis 2156 if (pindex->GetBlockHash() == hashStop)
genesis 2157 {
genesis 2158 printf(" getblocks stopping at %d %s (%u bytes)\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str(), nBytes);
genesis 2159 break;
genesis 2160 }
genesis 2161 pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
genesis 2162 CBlock block;
genesis 2163 block.ReadFromDisk(pindex, true);
genesis 2164 nBytes += block.GetSerializeSize(SER_NETWORK);
genesis 2165 if (--nLimit <= 0 || nBytes >= SendBufferSize()/2)
genesis 2166 {
genesis 2167 // When this block is requested, we'll send an inv that'll make them
genesis 2168 // getblocks the next batch of inventory.
genesis 2169 printf(" getblocks stopping at limit %d %s (%u bytes)\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str(), nBytes);
genesis 2170 pfrom->hashContinue = pindex->GetBlockHash();
genesis 2171 break;
genesis 2172 }
genesis 2173 }
genesis 2174 }
genesis 2175
genesis 2176
genesis 2177 else if (strCommand == "getheaders")
genesis 2178 {
genesis 2179 CBlockLocator locator;
genesis 2180 uint256 hashStop;
genesis 2181 vRecv >> locator >> hashStop;
genesis 2182
genesis 2183 CBlockIndex* pindex = NULL;
genesis 2184 if (locator.IsNull())
genesis 2185 {
genesis 2186 // If locator is null, return the hashStop block
genesis 2187 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashStop);
genesis 2188 if (mi == mapBlockIndex.end())
genesis 2189 return true;
genesis 2190 pindex = (*mi).second;
genesis 2191 }
genesis 2192 else
genesis 2193 {
genesis 2194 // Find the last block the caller has in the main chain
genesis 2195 pindex = locator.GetBlockIndex();
genesis 2196 if (pindex)
genesis 2197 pindex = pindex->pnext;
genesis 2198 }
genesis 2199
genesis 2200 vector<CBlock> vHeaders;
genesis 2201 int nLimit = 2000 + locator.GetDistanceBack();
genesis 2202 printf("getheaders %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
genesis 2203 for (; pindex; pindex = pindex->pnext)
genesis 2204 {
genesis 2205 vHeaders.push_back(pindex->GetBlockHeader());
genesis 2206 if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
genesis 2207 break;
genesis 2208 }
genesis 2209 pfrom->PushMessage("headers", vHeaders);
genesis 2210 }
genesis 2211
genesis 2212
genesis 2213 else if (strCommand == "tx")
genesis 2214 {
genesis 2215 vector<uint256> vWorkQueue;
genesis 2216 CDataStream vMsg(vRecv);
genesis 2217 CTransaction tx;
genesis 2218 vRecv >> tx;
genesis 2219
genesis 2220 CInv inv(MSG_TX, tx.GetHash());
genesis 2221 pfrom->AddInventoryKnown(inv);
genesis 2222
genesis 2223 bool fMissingInputs = false;
genesis 2224 if (tx.AcceptToMemoryPool(true, &fMissingInputs))
genesis 2225 {
genesis 2226 SyncWithWallets(tx, NULL, true);
genesis 2227 RelayMessage(inv, vMsg);
genesis 2228 mapAlreadyAskedFor.erase(inv);
genesis 2229 vWorkQueue.push_back(inv.hash);
genesis 2230
genesis 2231 // Recursively process any orphan transactions that depended on this one
genesis 2232 for (int i = 0; i < vWorkQueue.size(); i++)
genesis 2233 {
genesis 2234 uint256 hashPrev = vWorkQueue[i];
genesis 2235 for (multimap<uint256, CDataStream*>::iterator mi = mapOrphanTransactionsByPrev.lower_bound(hashPrev);
genesis 2236 mi != mapOrphanTransactionsByPrev.upper_bound(hashPrev);
genesis 2237 ++mi)
genesis 2238 {
genesis 2239 const CDataStream& vMsg = *((*mi).second);
genesis 2240 CTransaction tx;
genesis 2241 CDataStream(vMsg) >> tx;
genesis 2242 CInv inv(MSG_TX, tx.GetHash());
genesis 2243
genesis 2244 if (tx.AcceptToMemoryPool(true))
genesis 2245 {
genesis 2246 printf(" accepted orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
genesis 2247 SyncWithWallets(tx, NULL, true);
genesis 2248 RelayMessage(inv, vMsg);
genesis 2249 mapAlreadyAskedFor.erase(inv);
genesis 2250 vWorkQueue.push_back(inv.hash);
genesis 2251 }
genesis 2252 }
genesis 2253 }
genesis 2254
genesis 2255 BOOST_FOREACH(uint256 hash, vWorkQueue)
genesis 2256 EraseOrphanTx(hash);
genesis 2257 }
genesis 2258 else if (fMissingInputs)
genesis 2259 {
genesis 2260 printf("storing orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
genesis 2261 AddOrphanTx(vMsg);
genesis 2262
genesis 2263 // DoS prevention: do not allow mapOrphanTransactions to grow unbounded
genesis 2264 int nEvicted = LimitOrphanTxSize(MAX_ORPHAN_TRANSACTIONS);
genesis 2265 if (nEvicted > 0)
genesis 2266 printf("mapOrphan overflow, removed %d tx\n", nEvicted);
genesis 2267 }
genesis 2268 if (tx.nDoS) pfrom->Misbehaving(tx.nDoS);
genesis 2269 }
genesis 2270
genesis 2271
genesis 2272 else if (strCommand == "block")
genesis 2273 {
genesis 2274 CBlock block;
genesis 2275 vRecv >> block;
genesis 2276
genesis 2277 printf("received block %s\n", block.GetHash().ToString().substr(0,20).c_str());
genesis 2278 // block.print();
genesis 2279
genesis 2280 CInv inv(MSG_BLOCK, block.GetHash());
genesis 2281 pfrom->AddInventoryKnown(inv);
genesis 2282
genesis 2283 if (ProcessBlock(pfrom, &block))
genesis 2284 mapAlreadyAskedFor.erase(inv);
genesis 2285 if (block.nDoS) pfrom->Misbehaving(block.nDoS);
genesis 2286 }
genesis 2287
genesis 2288
genesis 2289 else if (strCommand == "getaddr")
genesis 2290 {
genesis 2291 // Nodes rebroadcast an addr every 24 hours
genesis 2292 pfrom->vAddrToSend.clear();
genesis 2293 int64 nSince = GetAdjustedTime() - 3 * 60 * 60; // in the last 3 hours
genesis 2294 CRITICAL_BLOCK(cs_mapAddresses)
genesis 2295 {
genesis 2296 unsigned int nCount = 0;
genesis 2297 BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
genesis 2298 {
genesis 2299 const CAddress& addr = item.second;
genesis 2300 if (addr.nTime > nSince)
genesis 2301 nCount++;
genesis 2302 }
genesis 2303 BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
genesis 2304 {
genesis 2305 const CAddress& addr = item.second;
genesis 2306 if (addr.nTime > nSince && GetRand(nCount) < 2500)
genesis 2307 pfrom->PushAddress(addr);
genesis 2308 }
genesis 2309 }
genesis 2310 }
genesis 2311
genesis 2312
genesis 2313 else if (strCommand == "checkorder")
genesis 2314 {
genesis 2315 uint256 hashReply;
genesis 2316 vRecv >> hashReply;
genesis 2317
genesis 2318 if (!GetBoolArg("-allowreceivebyip"))
genesis 2319 {
genesis 2320 pfrom->PushMessage("reply", hashReply, (int)2, string(""));
genesis 2321 return true;
genesis 2322 }
genesis 2323
genesis 2324 CWalletTx order;
genesis 2325 vRecv >> order;
genesis 2326
genesis 2327 /// we have a chance to check the order here
genesis 2328
genesis 2329 // Keep giving the same key to the same ip until they use it
genesis 2330 if (!mapReuseKey.count(pfrom->addr.ip))
genesis 2331 pwalletMain->GetKeyFromPool(mapReuseKey[pfrom->addr.ip], true);
genesis 2332
genesis 2333 // Send back approval of order and pubkey to use
genesis 2334 CScript scriptPubKey;
genesis 2335 scriptPubKey << mapReuseKey[pfrom->addr.ip] << OP_CHECKSIG;
genesis 2336 pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
genesis 2337 }
genesis 2338
genesis 2339
genesis 2340 else if (strCommand == "reply")
genesis 2341 {
genesis 2342 uint256 hashReply;
genesis 2343 vRecv >> hashReply;
genesis 2344
genesis 2345 CRequestTracker tracker;
genesis 2346 CRITICAL_BLOCK(pfrom->cs_mapRequests)
genesis 2347 {
genesis 2348 map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
genesis 2349 if (mi != pfrom->mapRequests.end())
genesis 2350 {
genesis 2351 tracker = (*mi).second;
genesis 2352 pfrom->mapRequests.erase(mi);
genesis 2353 }
genesis 2354 }
genesis 2355 if (!tracker.IsNull())
genesis 2356 tracker.fn(tracker.param1, vRecv);
genesis 2357 }
genesis 2358
genesis 2359
genesis 2360 else if (strCommand == "ping")
genesis 2361 {
genesis 2362 }
genesis 2363
genesis 2364
genesis 2365 else if (strCommand == "alert")
genesis 2366 {
genesis 2367 CAlert alert;
genesis 2368 vRecv >> alert;
genesis 2369
genesis 2370 if (alert.ProcessAlert())
genesis 2371 {
genesis 2372 // Relay
genesis 2373 pfrom->setKnown.insert(alert.GetHash());
genesis 2374 CRITICAL_BLOCK(cs_vNodes)
genesis 2375 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 2376 alert.RelayTo(pnode);
genesis 2377 }
genesis 2378 }
genesis 2379
genesis 2380
genesis 2381 else
genesis 2382 {
genesis 2383 // Ignore unknown commands for extensibility
genesis 2384 }
genesis 2385
genesis 2386
genesis 2387 // Update the last seen time for this node's address
genesis 2388 if (pfrom->fNetworkNode)
genesis 2389 if (strCommand == "version" || strCommand == "addr" || strCommand == "inv" || strCommand == "getdata" || strCommand == "ping")
genesis 2390 AddressCurrentlyConnected(pfrom->addr);
genesis 2391
genesis 2392
genesis 2393 return true;
genesis 2394 }
genesis 2395
genesis 2396 bool ProcessMessages(CNode* pfrom)
genesis 2397 {
genesis 2398 CDataStream& vRecv = pfrom->vRecv;
genesis 2399 if (vRecv.empty())
genesis 2400 return true;
genesis 2401 //if (fDebug)
genesis 2402 // printf("ProcessMessages(%u bytes)\n", vRecv.size());
genesis 2403
genesis 2404 //
genesis 2405 // Message format
genesis 2406 // (4) message start
genesis 2407 // (12) command
genesis 2408 // (4) size
genesis 2409 // (4) checksum
genesis 2410 // (x) data
genesis 2411 //
genesis 2412
genesis 2413 loop
genesis 2414 {
genesis 2415 // Scan for message start
genesis 2416 CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
genesis 2417 int nHeaderSize = vRecv.GetSerializeSize(CMessageHeader());
genesis 2418 if (vRecv.end() - pstart < nHeaderSize)
genesis 2419 {
genesis 2420 if (vRecv.size() > nHeaderSize)
genesis 2421 {
genesis 2422 printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
genesis 2423 vRecv.erase(vRecv.begin(), vRecv.end() - nHeaderSize);
genesis 2424 }
genesis 2425 break;
genesis 2426 }
genesis 2427 if (pstart - vRecv.begin() > 0)
genesis 2428 printf("\n\nPROCESSMESSAGE SKIPPED %d BYTES\n\n", pstart - vRecv.begin());
genesis 2429 vRecv.erase(vRecv.begin(), pstart);
genesis 2430
genesis 2431 // Read header
genesis 2432 vector<char> vHeaderSave(vRecv.begin(), vRecv.begin() + nHeaderSize);
genesis 2433 CMessageHeader hdr;
genesis 2434 vRecv >> hdr;
genesis 2435 if (!hdr.IsValid())
genesis 2436 {
genesis 2437 printf("\n\nPROCESSMESSAGE: ERRORS IN HEADER %s\n\n\n", hdr.GetCommand().c_str());
genesis 2438 continue;
genesis 2439 }
genesis 2440 string strCommand = hdr.GetCommand();
genesis 2441
genesis 2442 // Message size
genesis 2443 unsigned int nMessageSize = hdr.nMessageSize;
genesis 2444 if (nMessageSize > MAX_SIZE)
genesis 2445 {
genesis 2446 printf("ProcessMessage(%s, %u bytes) : nMessageSize > MAX_SIZE\n", strCommand.c_str(), nMessageSize);
genesis 2447 continue;
genesis 2448 }
genesis 2449 if (nMessageSize > vRecv.size())
genesis 2450 {
genesis 2451 // Rewind and wait for rest of message
genesis 2452 vRecv.insert(vRecv.begin(), vHeaderSave.begin(), vHeaderSave.end());
genesis 2453 break;
genesis 2454 }
genesis 2455
genesis 2456 // Checksum
genesis 2457 if (vRecv.GetVersion() >= 209)
genesis 2458 {
genesis 2459 uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
genesis 2460 unsigned int nChecksum = 0;
genesis 2461 memcpy(&nChecksum, &hash, sizeof(nChecksum));
genesis 2462 if (nChecksum != hdr.nChecksum)
genesis 2463 {
genesis 2464 printf("ProcessMessage(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
genesis 2465 strCommand.c_str(), nMessageSize, nChecksum, hdr.nChecksum);
genesis 2466 continue;
genesis 2467 }
genesis 2468 }
genesis 2469
genesis 2470 // Copy message to its own buffer
genesis 2471 CDataStream vMsg(vRecv.begin(), vRecv.begin() + nMessageSize, vRecv.nType, vRecv.nVersion);
genesis 2472 vRecv.ignore(nMessageSize);
genesis 2473
genesis 2474 // Process message
genesis 2475 bool fRet = false;
genesis 2476 try
genesis 2477 {
genesis 2478 CRITICAL_BLOCK(cs_main)
genesis 2479 fRet = ProcessMessage(pfrom, strCommand, vMsg);
genesis 2480 if (fShutdown)
genesis 2481 return true;
genesis 2482 }
genesis 2483 catch (std::ios_base::failure& e)
genesis 2484 {
genesis 2485 if (strstr(e.what(), "end of data"))
genesis 2486 {
genesis 2487 // Allow exceptions from underlength message on vRecv
genesis 2488 printf("ProcessMessage(%s, %u bytes) : Exception '%s' caught, normally caused by a message being shorter than its stated length\n", strCommand.c_str(), nMessageSize, e.what());
genesis 2489 }
genesis 2490 else if (strstr(e.what(), "size too large"))
genesis 2491 {
genesis 2492 // Allow exceptions from overlong size
genesis 2493 printf("ProcessMessage(%s, %u bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
genesis 2494 }
genesis 2495 else
genesis 2496 {
genesis 2497 PrintExceptionContinue(&e, "ProcessMessage()");
genesis 2498 }
genesis 2499 }
genesis 2500 catch (std::exception& e) {
genesis 2501 PrintExceptionContinue(&e, "ProcessMessage()");
genesis 2502 } catch (...) {
genesis 2503 PrintExceptionContinue(NULL, "ProcessMessage()");
genesis 2504 }
genesis 2505
genesis 2506 if (!fRet)
genesis 2507 printf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand.c_str(), nMessageSize);
genesis 2508 }
genesis 2509
genesis 2510 vRecv.Compact();
genesis 2511 return true;
genesis 2512 }
genesis 2513
genesis 2514
genesis 2515 bool SendMessages(CNode* pto, bool fSendTrickle)
genesis 2516 {
genesis 2517 CRITICAL_BLOCK(cs_main)
genesis 2518 {
genesis 2519 // Don't send anything until we get their version message
genesis 2520 if (pto->nVersion == 0)
genesis 2521 return true;
genesis 2522
genesis 2523 // Keep-alive ping
genesis 2524 if (pto->nLastSend && GetTime() - pto->nLastSend > 30 * 60 && pto->vSend.empty())
genesis 2525 pto->PushMessage("ping");
genesis 2526
genesis 2527 // Resend wallet transactions that haven't gotten in a block yet
genesis 2528 ResendWalletTransactions();
genesis 2529
genesis 2530 // Address refresh broadcast
genesis 2531 static int64 nLastRebroadcast;
genesis 2532 if (GetTime() - nLastRebroadcast > 24 * 60 * 60)
genesis 2533 {
genesis 2534 nLastRebroadcast = GetTime();
genesis 2535 CRITICAL_BLOCK(cs_vNodes)
genesis 2536 {
genesis 2537 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 2538 {
genesis 2539 // Periodically clear setAddrKnown to allow refresh broadcasts
genesis 2540 pnode->setAddrKnown.clear();
genesis 2541
genesis 2542 // Rebroadcast our address
genesis 2543 if (addrLocalHost.IsRoutable() && !fUseProxy)
genesis 2544 {
genesis 2545 CAddress addr(addrLocalHost);
genesis 2546 addr.nTime = GetAdjustedTime();
genesis 2547 pnode->PushAddress(addr);
genesis 2548 }
genesis 2549 }
genesis 2550 }
genesis 2551 }
genesis 2552
genesis 2553 // Clear out old addresses periodically so it's not too much work at once
genesis 2554 static int64 nLastClear;
genesis 2555 if (nLastClear == 0)
genesis 2556 nLastClear = GetTime();
genesis 2557 if (GetTime() - nLastClear > 10 * 60 && vNodes.size() >= 3)
genesis 2558 {
genesis 2559 nLastClear = GetTime();
genesis 2560 CRITICAL_BLOCK(cs_mapAddresses)
genesis 2561 {
genesis 2562 CAddrDB addrdb;
genesis 2563 int64 nSince = GetAdjustedTime() - 14 * 24 * 60 * 60;
genesis 2564 for (map<vector<unsigned char>, CAddress>::iterator mi = mapAddresses.begin();
genesis 2565 mi != mapAddresses.end();)
genesis 2566 {
genesis 2567 const CAddress& addr = (*mi).second;
genesis 2568 if (addr.nTime < nSince)
genesis 2569 {
genesis 2570 if (mapAddresses.size() < 1000 || GetTime() > nLastClear + 20)
genesis 2571 break;
genesis 2572 addrdb.EraseAddress(addr);
genesis 2573 mapAddresses.erase(mi++);
genesis 2574 }
genesis 2575 else
genesis 2576 mi++;
genesis 2577 }
genesis 2578 }
genesis 2579 }
genesis 2580
genesis 2581
genesis 2582 //
genesis 2583 // Message: addr
genesis 2584 //
genesis 2585 if (fSendTrickle)
genesis 2586 {
genesis 2587 vector<CAddress> vAddr;
genesis 2588 vAddr.reserve(pto->vAddrToSend.size());
genesis 2589 BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
genesis 2590 {
genesis 2591 // returns true if wasn't already contained in the set
genesis 2592 if (pto->setAddrKnown.insert(addr).second)
genesis 2593 {
genesis 2594 vAddr.push_back(addr);
genesis 2595 // receiver rejects addr messages larger than 1000
genesis 2596 if (vAddr.size() >= 1000)
genesis 2597 {
genesis 2598 pto->PushMessage("addr", vAddr);
genesis 2599 vAddr.clear();
genesis 2600 }
genesis 2601 }
genesis 2602 }
genesis 2603 pto->vAddrToSend.clear();
genesis 2604 if (!vAddr.empty())
genesis 2605 pto->PushMessage("addr", vAddr);
genesis 2606 }
genesis 2607
genesis 2608
genesis 2609 //
genesis 2610 // Message: inventory
genesis 2611 //
genesis 2612 vector<CInv> vInv;
genesis 2613 vector<CInv> vInvWait;
genesis 2614 CRITICAL_BLOCK(pto->cs_inventory)
genesis 2615 {
genesis 2616 vInv.reserve(pto->vInventoryToSend.size());
genesis 2617 vInvWait.reserve(pto->vInventoryToSend.size());
genesis 2618 BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
genesis 2619 {
genesis 2620 if (pto->setInventoryKnown.count(inv))
genesis 2621 continue;
genesis 2622
genesis 2623 // trickle out tx inv to protect privacy
genesis 2624 if (inv.type == MSG_TX && !fSendTrickle)
genesis 2625 {
genesis 2626 // 1/4 of tx invs blast to all immediately
genesis 2627 static uint256 hashSalt;
genesis 2628 if (hashSalt == 0)
genesis 2629 RAND_bytes((unsigned char*)&hashSalt, sizeof(hashSalt));
genesis 2630 uint256 hashRand = inv.hash ^ hashSalt;
genesis 2631 hashRand = Hash(BEGIN(hashRand), END(hashRand));
genesis 2632 bool fTrickleWait = ((hashRand & 3) != 0);
genesis 2633
genesis 2634 // always trickle our own transactions
genesis 2635 if (!fTrickleWait)
genesis 2636 {
genesis 2637 CWalletTx wtx;
genesis 2638 if (GetTransaction(inv.hash, wtx))
genesis 2639 if (wtx.fFromMe)
genesis 2640 fTrickleWait = true;
genesis 2641 }
genesis 2642
genesis 2643 if (fTrickleWait)
genesis 2644 {
genesis 2645 vInvWait.push_back(inv);
genesis 2646 continue;
genesis 2647 }
genesis 2648 }
genesis 2649
genesis 2650 // returns true if wasn't already contained in the set
genesis 2651 if (pto->setInventoryKnown.insert(inv).second)
genesis 2652 {
genesis 2653 vInv.push_back(inv);
genesis 2654 if (vInv.size() >= 1000)
genesis 2655 {
genesis 2656 pto->PushMessage("inv", vInv);
genesis 2657 vInv.clear();
genesis 2658 }
genesis 2659 }
genesis 2660 }
genesis 2661 pto->vInventoryToSend = vInvWait;
genesis 2662 }
genesis 2663 if (!vInv.empty())
genesis 2664 pto->PushMessage("inv", vInv);
genesis 2665
genesis 2666
genesis 2667 //
genesis 2668 // Message: getdata
genesis 2669 //
genesis 2670 vector<CInv> vGetData;
genesis 2671 int64 nNow = GetTime() * 1000000;
genesis 2672 CTxDB txdb("r");
genesis 2673 while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
genesis 2674 {
genesis 2675 const CInv& inv = (*pto->mapAskFor.begin()).second;
genesis 2676 if (!AlreadyHave(txdb, inv))
genesis 2677 {
genesis 2678 printf("sending getdata: %s\n", inv.ToString().c_str());
genesis 2679 vGetData.push_back(inv);
genesis 2680 if (vGetData.size() >= 1000)
genesis 2681 {
genesis 2682 pto->PushMessage("getdata", vGetData);
genesis 2683 vGetData.clear();
genesis 2684 }
genesis 2685 }
genesis 2686 mapAlreadyAskedFor[inv] = nNow;
genesis 2687 pto->mapAskFor.erase(pto->mapAskFor.begin());
genesis 2688 }
genesis 2689 if (!vGetData.empty())
genesis 2690 pto->PushMessage("getdata", vGetData);
genesis 2691
genesis 2692 }
genesis 2693 return true;
genesis 2694 }
genesis 2695
genesis 2696
genesis 2697
genesis 2698
genesis 2699
genesis 2700
genesis 2701
genesis 2702
genesis 2703
genesis 2704
genesis 2705
genesis 2706
genesis 2707
genesis 2708
genesis 2709 //////////////////////////////////////////////////////////////////////////////
genesis 2710 //
genesis 2711 // BitcoinMiner
genesis 2712 //
genesis 2713
genesis 2714 int static FormatHashBlocks(void* pbuffer, unsigned int len)
genesis 2715 {
genesis 2716 unsigned char* pdata = (unsigned char*)pbuffer;
genesis 2717 unsigned int blocks = 1 + ((len + 8) / 64);
genesis 2718 unsigned char* pend = pdata + 64 * blocks;
genesis 2719 memset(pdata + len, 0, 64 * blocks - len);
genesis 2720 pdata[len] = 0x80;
genesis 2721 unsigned int bits = len * 8;
genesis 2722 pend[-1] = (bits >> 0) & 0xff;
genesis 2723 pend[-2] = (bits >> 8) & 0xff;
genesis 2724 pend[-3] = (bits >> 16) & 0xff;
genesis 2725 pend[-4] = (bits >> 24) & 0xff;
genesis 2726 return blocks;
genesis 2727 }
genesis 2728
genesis 2729 static const unsigned int pSHA256InitState[8] =
genesis 2730 {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
genesis 2731
genesis 2732 void SHA256Transform(void* pstate, void* pinput, const void* pinit)
genesis 2733 {
genesis 2734 SHA256_CTX ctx;
genesis 2735 unsigned char data[64];
genesis 2736
genesis 2737 SHA256_Init(&ctx);
genesis 2738
genesis 2739 for (int i = 0; i < 16; i++)
genesis 2740 ((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]);
genesis 2741
genesis 2742 for (int i = 0; i < 8; i++)
genesis 2743 ctx.h[i] = ((uint32_t*)pinit)[i];
genesis 2744
genesis 2745 SHA256_Update(&ctx, data, sizeof(data));
genesis 2746 for (int i = 0; i < 8; i++)
genesis 2747 ((uint32_t*)pstate)[i] = ctx.h[i];
genesis 2748 }
genesis 2749
genesis 2750 //
genesis 2751 // ScanHash scans nonces looking for a hash with at least some zero bits.
genesis 2752 // It operates on big endian data. Caller does the byte reversing.
genesis 2753 // All input buffers are 16-byte aligned. nNonce is usually preserved
genesis 2754 // between calls, but periodically or if nNonce is 0xffff0000 or above,
genesis 2755 // the block is rebuilt and nNonce starts over at zero.
genesis 2756 //
genesis 2757 unsigned int static ScanHash_CryptoPP(char* pmidstate, char* pdata, char* phash1, char* phash, unsigned int& nHashesDone)
genesis 2758 {
genesis 2759 unsigned int& nNonce = *(unsigned int*)(pdata + 12);
genesis 2760 for (;;)
genesis 2761 {
genesis 2762 // Crypto++ SHA-256
genesis 2763 // Hash pdata using pmidstate as the starting state into
genesis 2764 // preformatted buffer phash1, then hash phash1 into phash
genesis 2765 nNonce++;
genesis 2766 SHA256Transform(phash1, pdata, pmidstate);
genesis 2767 SHA256Transform(phash, phash1, pSHA256InitState);
genesis 2768
genesis 2769 // Return the nonce if the hash has at least some zero bits,
genesis 2770 // caller will check if it has enough to reach the target
genesis 2771 if (((unsigned short*)phash)[14] == 0)
genesis 2772 return nNonce;
genesis 2773
genesis 2774 // If nothing found after trying for a while, return -1
genesis 2775 if ((nNonce & 0xffff) == 0)
genesis 2776 {
genesis 2777 nHashesDone = 0xffff+1;
genesis 2778 return -1;
genesis 2779 }
genesis 2780 }
genesis 2781 }
genesis 2782
genesis 2783 // Some explaining would be appreciated
genesis 2784 class COrphan
genesis 2785 {
genesis 2786 public:
genesis 2787 CTransaction* ptx;
genesis 2788 set<uint256> setDependsOn;
genesis 2789 double dPriority;
genesis 2790
genesis 2791 COrphan(CTransaction* ptxIn)
genesis 2792 {
genesis 2793 ptx = ptxIn;
genesis 2794 dPriority = 0;
genesis 2795 }
genesis 2796
genesis 2797 void print() const
genesis 2798 {
genesis 2799 printf("COrphan(hash=%s, dPriority=%.1f)\n", ptx->GetHash().ToString().substr(0,10).c_str(), dPriority);
genesis 2800 BOOST_FOREACH(uint256 hash, setDependsOn)
genesis 2801 printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
genesis 2802 }
genesis 2803 };
genesis 2804
genesis 2805
genesis 2806 CBlock* CreateNewBlock(CReserveKey& reservekey)
genesis 2807 {
genesis 2808 CBlockIndex* pindexPrev = pindexBest;
genesis 2809
genesis 2810 // Create new block
genesis 2811 auto_ptr<CBlock> pblock(new CBlock());
genesis 2812 if (!pblock.get())
genesis 2813 return NULL;
genesis 2814
genesis 2815 // Create coinbase tx
genesis 2816 CTransaction txNew;
genesis 2817 txNew.vin.resize(1);
genesis 2818 txNew.vin[0].prevout.SetNull();
genesis 2819 txNew.vout.resize(1);
genesis 2820 txNew.vout[0].scriptPubKey << reservekey.GetReservedKey() << OP_CHECKSIG;
genesis 2821
genesis 2822 // Add our coinbase tx as first transaction
genesis 2823 pblock->vtx.push_back(txNew);
genesis 2824
genesis 2825 // Collect memory pool transactions into the block
genesis 2826 int64 nFees = 0;
genesis 2827 CRITICAL_BLOCK(cs_main)
genesis 2828 CRITICAL_BLOCK(cs_mapTransactions)
genesis 2829 {
genesis 2830 CTxDB txdb("r");
genesis 2831
genesis 2832 // Priority order to process transactions
genesis 2833 list<COrphan> vOrphan; // list memory doesn't move
genesis 2834 map<uint256, vector<COrphan*> > mapDependers;
genesis 2835 multimap<double, CTransaction*> mapPriority;
genesis 2836 for (map<uint256, CTransaction>::iterator mi = mapTransactions.begin(); mi != mapTransactions.end(); ++mi)
genesis 2837 {
genesis 2838 CTransaction& tx = (*mi).second;
genesis 2839 if (tx.IsCoinBase() || !tx.IsFinal())
genesis 2840 continue;
genesis 2841
genesis 2842 COrphan* porphan = NULL;
genesis 2843 double dPriority = 0;
genesis 2844 BOOST_FOREACH(const CTxIn& txin, tx.vin)
genesis 2845 {
genesis 2846 // Read prev transaction
genesis 2847 CTransaction txPrev;
genesis 2848 CTxIndex txindex;
genesis 2849 if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
genesis 2850 {
genesis 2851 // Has to wait for dependencies
genesis 2852 if (!porphan)
genesis 2853 {
genesis 2854 // Use list for automatic deletion
genesis 2855 vOrphan.push_back(COrphan(&tx));
genesis 2856 porphan = &vOrphan.back();
genesis 2857 }
genesis 2858 mapDependers[txin.prevout.hash].push_back(porphan);
genesis 2859 porphan->setDependsOn.insert(txin.prevout.hash);
genesis 2860 continue;
genesis 2861 }
genesis 2862 int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
genesis 2863
genesis 2864 // Read block header
genesis 2865 int nConf = txindex.GetDepthInMainChain();
genesis 2866
genesis 2867 dPriority += (double)nValueIn * nConf;
genesis 2868
genesis 2869 if (fDebug && GetBoolArg("-printpriority"))
genesis 2870 printf("priority nValueIn=%-12I64d nConf=%-5d dPriority=%-20.1f\n", nValueIn, nConf, dPriority);
genesis 2871 }
genesis 2872
genesis 2873 // Priority is sum(valuein * age) / txsize
genesis 2874 dPriority /= ::GetSerializeSize(tx, SER_NETWORK);
genesis 2875
genesis 2876 if (porphan)
genesis 2877 porphan->dPriority = dPriority;
genesis 2878 else
genesis 2879 mapPriority.insert(make_pair(-dPriority, &(*mi).second));
genesis 2880
genesis 2881 if (fDebug && GetBoolArg("-printpriority"))
genesis 2882 {
genesis 2883 printf("priority %-20.1f %s\n%s", dPriority, tx.GetHash().ToString().substr(0,10).c_str(), tx.ToString().c_str());
genesis 2884 if (porphan)
genesis 2885 porphan->print();
genesis 2886 printf("\n");
genesis 2887 }
genesis 2888 }
genesis 2889
genesis 2890 // Collect transactions into block
genesis 2891 map<uint256, CTxIndex> mapTestPool;
genesis 2892 uint64 nBlockSize = 1000;
genesis 2893 int nBlockSigOps = 100;
genesis 2894 while (!mapPriority.empty())
genesis 2895 {
genesis 2896 // Take highest priority transaction off priority queue
genesis 2897 double dPriority = -(*mapPriority.begin()).first;
genesis 2898 CTransaction& tx = *(*mapPriority.begin()).second;
genesis 2899 mapPriority.erase(mapPriority.begin());
genesis 2900
genesis 2901 // Size limits
genesis 2902 unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK);
genesis 2903 if (nBlockSize + nTxSize >= MAX_BLOCK_SIZE_GEN)
genesis 2904 continue;
genesis 2905 int nTxSigOps = tx.GetSigOpCount();
genesis 2906 if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
genesis 2907 continue;
genesis 2908
genesis 2909 // Transaction fee required depends on block size
genesis 2910 bool fAllowFree = (nBlockSize + nTxSize < 4000 || CTransaction::AllowFree(dPriority));
genesis 2911 int64 nMinFee = tx.GetMinFee(nBlockSize, fAllowFree);
genesis 2912
genesis 2913 // Connecting shouldn't fail due to dependency on other memory pool transactions
genesis 2914 // because we're already processing them in order of dependency
genesis 2915 map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
genesis 2916 bool fInvalid;
genesis 2917 if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, nFees, false, true, nMinFee, fInvalid))
genesis 2918 continue;
genesis 2919 swap(mapTestPool, mapTestPoolTmp);
genesis 2920
genesis 2921 // Added
genesis 2922 pblock->vtx.push_back(tx);
genesis 2923 nBlockSize += nTxSize;
genesis 2924 nBlockSigOps += nTxSigOps;
genesis 2925
genesis 2926 // Add transactions that depend on this one to the priority queue
genesis 2927 uint256 hash = tx.GetHash();
genesis 2928 if (mapDependers.count(hash))
genesis 2929 {
genesis 2930 BOOST_FOREACH(COrphan* porphan, mapDependers[hash])
genesis 2931 {
genesis 2932 if (!porphan->setDependsOn.empty())
genesis 2933 {
genesis 2934 porphan->setDependsOn.erase(hash);
genesis 2935 if (porphan->setDependsOn.empty())
genesis 2936 mapPriority.insert(make_pair(-porphan->dPriority, porphan->ptx));
genesis 2937 }
genesis 2938 }
genesis 2939 }
genesis 2940 }
genesis 2941 }
genesis 2942 pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nHeight+1, nFees);
genesis 2943
genesis 2944 // Fill in header
genesis 2945 pblock->hashPrevBlock = pindexPrev->GetBlockHash();
genesis 2946 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
genesis 2947 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
genesis 2948 pblock->nBits = GetNextWorkRequired(pindexPrev, pblock.get());
genesis 2949 pblock->nNonce = 0;
genesis 2950
genesis 2951 return pblock.release();
genesis 2952 }
genesis 2953
genesis 2954
genesis 2955 void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
genesis 2956 {
genesis 2957 // Update nExtraNonce
genesis 2958 static uint256 hashPrevBlock;
genesis 2959 if (hashPrevBlock != pblock->hashPrevBlock)
genesis 2960 {
genesis 2961 nExtraNonce = 0;
genesis 2962 hashPrevBlock = pblock->hashPrevBlock;
genesis 2963 }
genesis 2964 ++nExtraNonce;
genesis 2965 pblock->vtx[0].vin[0].scriptSig = CScript() << pblock->nTime << CBigNum(nExtraNonce);
genesis 2966 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
genesis 2967 }
genesis 2968
genesis 2969
genesis 2970 void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
genesis 2971 {
genesis 2972 //
genesis 2973 // Prebuild hash buffers
genesis 2974 //
genesis 2975 struct
genesis 2976 {
genesis 2977 struct unnamed2
genesis 2978 {
genesis 2979 int nVersion;
genesis 2980 uint256 hashPrevBlock;
genesis 2981 uint256 hashMerkleRoot;
genesis 2982 unsigned int nTime;
genesis 2983 unsigned int nBits;
genesis 2984 unsigned int nNonce;
genesis 2985 }
genesis 2986 block;
genesis 2987 unsigned char pchPadding0[64];
genesis 2988 uint256 hash1;
genesis 2989 unsigned char pchPadding1[64];
genesis 2990 }
genesis 2991 tmp;
genesis 2992 memset(&tmp, 0, sizeof(tmp));
genesis 2993
genesis 2994 tmp.block.nVersion = pblock->nVersion;
genesis 2995 tmp.block.hashPrevBlock = pblock->hashPrevBlock;
genesis 2996 tmp.block.hashMerkleRoot = pblock->hashMerkleRoot;
genesis 2997 tmp.block.nTime = pblock->nTime;
genesis 2998 tmp.block.nBits = pblock->nBits;
genesis 2999 tmp.block.nNonce = pblock->nNonce;
genesis 3000
genesis 3001 FormatHashBlocks(&tmp.block, sizeof(tmp.block));
genesis 3002 FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
genesis 3003
genesis 3004 // Byte swap all the input buffer
genesis 3005 for (int i = 0; i < sizeof(tmp)/4; i++)
genesis 3006 ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
genesis 3007
genesis 3008 // Precalc the first half of the first hash, which stays constant
genesis 3009 SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
genesis 3010
genesis 3011 memcpy(pdata, &tmp.block, 128);
genesis 3012 memcpy(phash1, &tmp.hash1, 64);
genesis 3013 }
genesis 3014
genesis 3015
genesis 3016 bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
genesis 3017 {
genesis 3018 uint256 hash = pblock->GetHash();
genesis 3019 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
genesis 3020
genesis 3021 if (hash > hashTarget)
genesis 3022 return false;
genesis 3023
genesis 3024 //// debug print
genesis 3025 printf("BitcoinMiner:\n");
genesis 3026 printf("proof-of-work found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str());
genesis 3027 pblock->print();
genesis 3028 printf("%s ", DateTimeStrFormat("%x %H:%M", GetTime()).c_str());
genesis 3029 printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str());
genesis 3030
genesis 3031 // Found a solution
genesis 3032 CRITICAL_BLOCK(cs_main)
genesis 3033 {
genesis 3034 if (pblock->hashPrevBlock != hashBestChain)
genesis 3035 return error("BitcoinMiner : generated block is stale");
genesis 3036
genesis 3037 // Remove key from key pool
genesis 3038 reservekey.KeepKey();
genesis 3039
genesis 3040 // Track how many getdata requests this block gets
genesis 3041 CRITICAL_BLOCK(wallet.cs_wallet)
genesis 3042 wallet.mapRequestCount[pblock->GetHash()] = 0;
genesis 3043
genesis 3044 // Process this block the same as if we had received it from another node
genesis 3045 if (!ProcessBlock(NULL, pblock))
genesis 3046 return error("BitcoinMiner : ProcessBlock, block not accepted");
genesis 3047 }
genesis 3048
genesis 3049 return true;
genesis 3050 }
genesis 3051
genesis 3052 void static ThreadBitcoinMiner(void* parg);
genesis 3053
genesis 3054 void static BitcoinMiner(CWallet *pwallet)
genesis 3055 {
genesis 3056 printf("BitcoinMiner started\n");
genesis 3057 SetThreadPriority(THREAD_PRIORITY_LOWEST);
genesis 3058
genesis 3059 // Each thread has its own key and counter
genesis 3060 CReserveKey reservekey(pwallet);
genesis 3061 unsigned int nExtraNonce = 0;
genesis 3062
genesis 3063 while (fGenerateBitcoins)
genesis 3064 {
genesis 3065 if (AffinityBugWorkaround(ThreadBitcoinMiner))
genesis 3066 return;
genesis 3067 if (fShutdown)
genesis 3068 return;
genesis 3069 while (vNodes.empty() || IsInitialBlockDownload())
genesis 3070 {
genesis 3071 Sleep(1000);
genesis 3072 if (fShutdown)
genesis 3073 return;
genesis 3074 if (!fGenerateBitcoins)
genesis 3075 return;
genesis 3076 }
genesis 3077
genesis 3078
genesis 3079 //
genesis 3080 // Create new block
genesis 3081 //
genesis 3082 unsigned int nTransactionsUpdatedLast = nTransactionsUpdated;
genesis 3083 CBlockIndex* pindexPrev = pindexBest;
genesis 3084
genesis 3085 auto_ptr<CBlock> pblock(CreateNewBlock(reservekey));
genesis 3086 if (!pblock.get())
genesis 3087 return;
genesis 3088 IncrementExtraNonce(pblock.get(), pindexPrev, nExtraNonce);
genesis 3089
genesis 3090 printf("Running BitcoinMiner with %d transactions in block\n", pblock->vtx.size());
genesis 3091
genesis 3092
genesis 3093 //
genesis 3094 // Prebuild hash buffers
genesis 3095 //
genesis 3096 char pmidstatebuf[32+16]; char* pmidstate = alignup<16>(pmidstatebuf);
genesis 3097 char pdatabuf[128+16]; char* pdata = alignup<16>(pdatabuf);
genesis 3098 char phash1buf[64+16]; char* phash1 = alignup<16>(phash1buf);
genesis 3099
genesis 3100 FormatHashBuffers(pblock.get(), pmidstate, pdata, phash1);
genesis 3101
genesis 3102 unsigned int& nBlockTime = *(unsigned int*)(pdata + 64 + 4);
genesis 3103 unsigned int& nBlockNonce = *(unsigned int*)(pdata + 64 + 12);
genesis 3104
genesis 3105
genesis 3106 //
genesis 3107 // Search
genesis 3108 //
genesis 3109 int64 nStart = GetTime();
genesis 3110 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
genesis 3111 uint256 hashbuf[2];
genesis 3112 uint256& hash = *alignup<16>(hashbuf);
genesis 3113 loop
genesis 3114 {
genesis 3115 unsigned int nHashesDone = 0;
genesis 3116 unsigned int nNonceFound;
genesis 3117
genesis 3118 // Crypto++ SHA-256
genesis 3119 nNonceFound = ScanHash_CryptoPP(pmidstate, pdata + 64, phash1,
genesis 3120 (char*)&hash, nHashesDone);
genesis 3121
genesis 3122 // Check if something found
genesis 3123 if (nNonceFound != -1)
genesis 3124 {
genesis 3125 for (int i = 0; i < sizeof(hash)/4; i++)
genesis 3126 ((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]);
genesis 3127
genesis 3128 if (hash <= hashTarget)
genesis 3129 {
genesis 3130 // Found a solution
genesis 3131 pblock->nNonce = ByteReverse(nNonceFound);
genesis 3132 assert(hash == pblock->GetHash());
genesis 3133
genesis 3134 SetThreadPriority(THREAD_PRIORITY_NORMAL);
genesis 3135 CheckWork(pblock.get(), *pwalletMain, reservekey);
genesis 3136 SetThreadPriority(THREAD_PRIORITY_LOWEST);
genesis 3137 break;
genesis 3138 }
genesis 3139 }
genesis 3140
genesis 3141 // Meter hashes/sec
genesis 3142 static int64 nHashCounter;
genesis 3143 if (nHPSTimerStart == 0)
genesis 3144 {
genesis 3145 nHPSTimerStart = GetTimeMillis();
genesis 3146 nHashCounter = 0;
genesis 3147 }
genesis 3148 else
genesis 3149 nHashCounter += nHashesDone;
genesis 3150 if (GetTimeMillis() - nHPSTimerStart > 4000)
genesis 3151 {
genesis 3152 static CCriticalSection cs;
genesis 3153 CRITICAL_BLOCK(cs)
genesis 3154 {
genesis 3155 if (GetTimeMillis() - nHPSTimerStart > 4000)
genesis 3156 {
genesis 3157 dHashesPerSec = 1000.0 * nHashCounter / (GetTimeMillis() - nHPSTimerStart);
genesis 3158 nHPSTimerStart = GetTimeMillis();
genesis 3159 nHashCounter = 0;
genesis 3160 string strStatus = strprintf(" %.0f khash/s", dHashesPerSec/1000.0);
genesis 3161 UIThreadCall(boost::bind(CalledSetStatusBar, strStatus, 0));
genesis 3162 static int64 nLogTime;
genesis 3163 if (GetTime() - nLogTime > 30 * 60)
genesis 3164 {
genesis 3165 nLogTime = GetTime();
genesis 3166 printf("%s ", DateTimeStrFormat("%x %H:%M", GetTime()).c_str());
genesis 3167 printf("hashmeter %3d CPUs %6.0f khash/s\n", vnThreadsRunning[3], dHashesPerSec/1000.0);
genesis 3168 }
genesis 3169 }
genesis 3170 }
genesis 3171 }
genesis 3172
genesis 3173 // Check for stop or if block needs to be rebuilt
genesis 3174 if (fShutdown)
genesis 3175 return;
genesis 3176 if (!fGenerateBitcoins)
genesis 3177 return;
genesis 3178 if (fLimitProcessors && vnThreadsRunning[3] > nLimitProcessors)
genesis 3179 return;
genesis 3180 if (vNodes.empty())
genesis 3181 break;
genesis 3182 if (nBlockNonce >= 0xffff0000)
genesis 3183 break;
genesis 3184 if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60)
genesis 3185 break;
genesis 3186 if (pindexPrev != pindexBest)
genesis 3187 break;
genesis 3188
genesis 3189 // Update nTime every few seconds
genesis 3190 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
genesis 3191 nBlockTime = ByteReverse(pblock->nTime);
genesis 3192 }
genesis 3193 }
genesis 3194 }
genesis 3195
genesis 3196 void static ThreadBitcoinMiner(void* parg)
genesis 3197 {
genesis 3198 CWallet* pwallet = (CWallet*)parg;
genesis 3199 try
genesis 3200 {
genesis 3201 vnThreadsRunning[3]++;
genesis 3202 BitcoinMiner(pwallet);
genesis 3203 vnThreadsRunning[3]--;
genesis 3204 }
genesis 3205 catch (std::exception& e) {
genesis 3206 vnThreadsRunning[3]--;
genesis 3207 PrintException(&e, "ThreadBitcoinMiner()");
genesis 3208 } catch (...) {
genesis 3209 vnThreadsRunning[3]--;
genesis 3210 PrintException(NULL, "ThreadBitcoinMiner()");
genesis 3211 }
genesis 3212 UIThreadCall(boost::bind(CalledSetStatusBar, "", 0));
genesis 3213 nHPSTimerStart = 0;
genesis 3214 if (vnThreadsRunning[3] == 0)
genesis 3215 dHashesPerSec = 0;
genesis 3216 printf("ThreadBitcoinMiner exiting, %d threads remaining\n", vnThreadsRunning[3]);
genesis 3217 }
genesis 3218
genesis 3219
genesis 3220 void GenerateBitcoins(bool fGenerate, CWallet* pwallet)
genesis 3221 {
genesis 3222 if (fGenerateBitcoins != fGenerate)
genesis 3223 {
genesis 3224 fGenerateBitcoins = fGenerate;
genesis 3225 WriteSetting("fGenerateBitcoins", fGenerateBitcoins);
genesis 3226 MainFrameRepaint();
genesis 3227 }
genesis 3228 if (fGenerateBitcoins)
genesis 3229 {
genesis 3230 int nProcessors = boost::thread::hardware_concurrency();
genesis 3231 printf("%d processors\n", nProcessors);
genesis 3232 if (nProcessors < 1)
genesis 3233 nProcessors = 1;
genesis 3234 if (fLimitProcessors && nProcessors > nLimitProcessors)
genesis 3235 nProcessors = nLimitProcessors;
genesis 3236 int nAddThreads = nProcessors - vnThreadsRunning[3];
genesis 3237 printf("Starting %d BitcoinMiner threads\n", nAddThreads);
genesis 3238 for (int i = 0; i < nAddThreads; i++)
genesis 3239 {
genesis 3240 if (!CreateThread(ThreadBitcoinMiner, pwallet))
genesis 3241 printf("Error: CreateThread(ThreadBitcoinMiner) failed\n");
genesis 3242 Sleep(10);
genesis 3243 }
genesis 3244 }
genesis 3245 }