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
makefiles 13 // v0.5.4 RELEASE
makefiles 14
genesis 15 using namespace std;
genesis 16 using namespace boost;
genesis 17
genesis 18 //
genesis 19 // Global state
genesis 20 //
genesis 21
programmable-vers... 22 int VERSION = DEFAULT_CLIENT_VERSION;
programmable-vers... 23
genesis 24 CCriticalSection cs_setpwalletRegistered;
genesis 25 set<CWallet*> setpwalletRegistered;
genesis 26
genesis 27 CCriticalSection cs_main;
genesis 28
genesis 29 static map<uint256, CTransaction> mapTransactions;
genesis 30 CCriticalSection cs_mapTransactions;
genesis 31 unsigned int nTransactionsUpdated = 0;
genesis 32 map<COutPoint, CInPoint> mapNextTx;
genesis 33
genesis 34 map<uint256, CBlockIndex*> mapBlockIndex;
genesis 35 uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f");
genesis 36 static CBigNum bnProofOfWorkLimit(~uint256(0) >> 32);
genesis 37 CBlockIndex* pindexGenesisBlock = NULL;
genesis 38 int nBestHeight = -1;
genesis 39 CBigNum bnBestChainWork = 0;
genesis 40 CBigNum bnBestInvalidWork = 0;
genesis 41 uint256 hashBestChain = 0;
genesis 42 CBlockIndex* pindexBest = NULL;
genesis 43 int64 nTimeBestReceived = 0;
genesis 44
genesis 45 CMedianFilter<int> cPeerBlockCounts(5, 0); // Amount of blocks that other nodes claim to have
genesis 46
genesis 47
genesis 48
genesis 49 double dHashesPerSec;
genesis 50 int64 nHPSTimerStart;
genesis 51
genesis 52 // Settings
genesis 53 int fGenerateBitcoins = false;
genesis 54 int64 nTransactionFee = 0;
genesis 55 int fLimitProcessors = false;
genesis 56 int nLimitProcessors = 1;
genesis 57 int fMinimizeToTray = true;
genesis 58 int fMinimizeOnClose = true;
genesis 59
genesis 60
genesis 61 //////////////////////////////////////////////////////////////////////////////
genesis 62 //
genesis 63 // dispatching functions
genesis 64 //
genesis 65
genesis 66 // These functions dispatch to one or all registered wallets
genesis 67
genesis 68
genesis 69 void RegisterWallet(CWallet* pwalletIn)
genesis 70 {
genesis 71 CRITICAL_BLOCK(cs_setpwalletRegistered)
genesis 72 {
genesis 73 setpwalletRegistered.insert(pwalletIn);
genesis 74 }
genesis 75 }
genesis 76
genesis 77 void UnregisterWallet(CWallet* pwalletIn)
genesis 78 {
genesis 79 CRITICAL_BLOCK(cs_setpwalletRegistered)
genesis 80 {
genesis 81 setpwalletRegistered.erase(pwalletIn);
genesis 82 }
genesis 83 }
genesis 84
genesis 85 // check whether the passed transaction is from us
genesis 86 bool static IsFromMe(CTransaction& tx)
genesis 87 {
genesis 88 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 89 if (pwallet->IsFromMe(tx))
genesis 90 return true;
genesis 91 return false;
genesis 92 }
genesis 93
genesis 94 // get the wallet transaction with the given hash (if it exists)
genesis 95 bool static GetTransaction(const uint256& hashTx, CWalletTx& wtx)
genesis 96 {
genesis 97 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 98 if (pwallet->GetTransaction(hashTx,wtx))
genesis 99 return true;
genesis 100 return false;
genesis 101 }
genesis 102
genesis 103 // erases transaction with the given hash from all wallets
genesis 104 void static EraseFromWallets(uint256 hash)
genesis 105 {
genesis 106 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 107 pwallet->EraseFromWallet(hash);
genesis 108 }
genesis 109
genesis 110 // make sure all wallets know about the given transaction, in the given block
genesis 111 void static SyncWithWallets(const CTransaction& tx, const CBlock* pblock = NULL, bool fUpdate = false)
genesis 112 {
genesis 113 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 114 pwallet->AddToWalletIfInvolvingMe(tx, pblock, fUpdate);
genesis 115 }
genesis 116
genesis 117 // notify wallets about a new best chain
genesis 118 void static SetBestChain(const CBlockLocator& loc)
genesis 119 {
genesis 120 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 121 pwallet->SetBestChain(loc);
genesis 122 }
genesis 123
genesis 124 // notify wallets about an updated transaction
genesis 125 void static UpdatedTransaction(const uint256& hashTx)
genesis 126 {
genesis 127 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 128 pwallet->UpdatedTransaction(hashTx);
genesis 129 }
genesis 130
genesis 131 // dump all wallets
genesis 132 void static PrintWallets(const CBlock& block)
genesis 133 {
genesis 134 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 135 pwallet->PrintWallet(block);
genesis 136 }
genesis 137
genesis 138 // notify wallets about an incoming inventory (for request counts)
genesis 139 void static Inventory(const uint256& hash)
genesis 140 {
genesis 141 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 142 pwallet->Inventory(hash);
genesis 143 }
genesis 144
genesis 145 // ask wallets to resend their transactions
genesis 146 void static ResendWalletTransactions()
genesis 147 {
genesis 148 BOOST_FOREACH(CWallet* pwallet, setpwalletRegistered)
genesis 149 pwallet->ResendWalletTransactions();
genesis 150 }
genesis 151
genesis 152
genesis 153 //////////////////////////////////////////////////////////////////////////////
genesis 154 //
genesis 155 // CTransaction and CTxIndex
genesis 156 //
genesis 157
genesis 158 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout, CTxIndex& txindexRet)
genesis 159 {
genesis 160 SetNull();
genesis 161 if (!txdb.ReadTxIndex(prevout.hash, txindexRet))
genesis 162 return false;
genesis 163 if (!ReadFromDisk(txindexRet.pos))
genesis 164 return false;
genesis 165 if (prevout.n >= vout.size())
genesis 166 {
genesis 167 SetNull();
genesis 168 return false;
genesis 169 }
genesis 170 return true;
genesis 171 }
genesis 172
genesis 173 bool CTransaction::ReadFromDisk(CTxDB& txdb, COutPoint prevout)
genesis 174 {
genesis 175 CTxIndex txindex;
genesis 176 return ReadFromDisk(txdb, prevout, txindex);
genesis 177 }
genesis 178
genesis 179 bool CTransaction::ReadFromDisk(COutPoint prevout)
genesis 180 {
genesis 181 CTxDB txdb("r");
genesis 182 CTxIndex txindex;
genesis 183 return ReadFromDisk(txdb, prevout, txindex);
genesis 184 }
genesis 185
genesis 186
genesis 187
genesis 188 int CMerkleTx::SetMerkleBranch(const CBlock* pblock)
genesis 189 {
genesis 190 if (fClient)
genesis 191 {
genesis 192 if (hashBlock == 0)
genesis 193 return 0;
genesis 194 }
genesis 195 else
genesis 196 {
genesis 197 CBlock blockTmp;
genesis 198 if (pblock == NULL)
genesis 199 {
genesis 200 // Load the block this tx is in
genesis 201 CTxIndex txindex;
genesis 202 if (!CTxDB("r").ReadTxIndex(GetHash(), txindex))
genesis 203 return 0;
genesis 204 if (!blockTmp.ReadFromDisk(txindex.pos.nFile, txindex.pos.nBlockPos))
genesis 205 return 0;
genesis 206 pblock = &blockTmp;
genesis 207 }
genesis 208
genesis 209 // Update the tx's hashBlock
genesis 210 hashBlock = pblock->GetHash();
genesis 211
genesis 212 // Locate the transaction
genesis 213 for (nIndex = 0; nIndex < pblock->vtx.size(); nIndex++)
genesis 214 if (pblock->vtx[nIndex] == *(CTransaction*)this)
genesis 215 break;
genesis 216 if (nIndex == pblock->vtx.size())
genesis 217 {
genesis 218 vMerkleBranch.clear();
genesis 219 nIndex = -1;
genesis 220 printf("ERROR: SetMerkleBranch() : couldn't find tx in block\n");
genesis 221 return 0;
genesis 222 }
genesis 223
genesis 224 // Fill in merkle branch
genesis 225 vMerkleBranch = pblock->GetMerkleBranch(nIndex);
genesis 226 }
genesis 227
genesis 228 // Is the tx in a block that's in the main chain
genesis 229 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
genesis 230 if (mi == mapBlockIndex.end())
genesis 231 return 0;
genesis 232 CBlockIndex* pindex = (*mi).second;
genesis 233 if (!pindex || !pindex->IsInMainChain())
genesis 234 return 0;
genesis 235
genesis 236 return pindexBest->nHeight - pindex->nHeight + 1;
genesis 237 }
genesis 238
genesis 239
genesis 240
genesis 241
genesis 242
genesis 243
genesis 244
genesis 245 bool CTransaction::CheckTransaction() const
genesis 246 {
genesis 247 // Basic checks that don't depend on any context
genesis 248 if (vin.empty())
genesis 249 return DoS(10, error("CTransaction::CheckTransaction() : vin empty"));
genesis 250 if (vout.empty())
genesis 251 return DoS(10, error("CTransaction::CheckTransaction() : vout empty"));
genesis 252 // Size limits
genesis 253 if (::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
genesis 254 return DoS(100, error("CTransaction::CheckTransaction() : size limits failed"));
genesis 255
genesis 256 // Check for negative or overflow output values
genesis 257 int64 nValueOut = 0;
genesis 258 BOOST_FOREACH(const CTxOut& txout, vout)
genesis 259 {
genesis 260 if (txout.nValue < 0)
genesis 261 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue negative"));
genesis 262 if (txout.nValue > MAX_MONEY)
genesis 263 return DoS(100, error("CTransaction::CheckTransaction() : txout.nValue too high"));
genesis 264 nValueOut += txout.nValue;
genesis 265 if (!MoneyRange(nValueOut))
genesis 266 return DoS(100, error("CTransaction::CheckTransaction() : txout total out of range"));
genesis 267 }
genesis 268
genesis 269 // Check for duplicate inputs
genesis 270 set<COutPoint> vInOutPoints;
genesis 271 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 272 {
genesis 273 if (vInOutPoints.count(txin.prevout))
genesis 274 return false;
genesis 275 vInOutPoints.insert(txin.prevout);
genesis 276 }
genesis 277
genesis 278 if (IsCoinBase())
genesis 279 {
genesis 280 if (vin[0].scriptSig.size() < 2 || vin[0].scriptSig.size() > 100)
genesis 281 return DoS(100, error("CTransaction::CheckTransaction() : coinbase script size"));
genesis 282 }
genesis 283 else
genesis 284 {
genesis 285 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 286 if (txin.prevout.IsNull())
genesis 287 return DoS(10, error("CTransaction::CheckTransaction() : prevout is null"));
genesis 288 }
genesis 289
genesis 290 return true;
genesis 291 }
genesis 292
genesis 293 bool CTransaction::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs, bool* pfMissingInputs)
genesis 294 {
genesis 295 if (pfMissingInputs)
genesis 296 *pfMissingInputs = false;
genesis 297
genesis 298 if (!CheckTransaction())
genesis 299 return error("AcceptToMemoryPool() : CheckTransaction failed");
genesis 300
genesis 301 // Coinbase is only valid in a block, not as a loose transaction
genesis 302 if (IsCoinBase())
genesis 303 return DoS(100, error("AcceptToMemoryPool() : coinbase as individual tx"));
genesis 304
genesis 305 // To help v0.1.5 clients who would see it as a negative number
genesis 306 if ((int64)nLockTime > INT_MAX)
genesis 307 return error("AcceptToMemoryPool() : not accepting nLockTime beyond 2038 yet");
genesis 308
genesis 309 // Safety limits
genesis 310 unsigned int nSize = ::GetSerializeSize(*this, SER_NETWORK);
genesis 311 // Checking ECDSA signatures is a CPU bottleneck, so to avoid denial-of-service
genesis 312 // attacks disallow transactions with more than one SigOp per 34 bytes.
genesis 313 // 34 bytes because a TxOut is:
genesis 314 // 20-byte address + 8 byte bitcoin amount + 5 bytes of ops + 1 byte script length
genesis 315 if (GetSigOpCount() > nSize / 34 || nSize < 100)
genesis 316 return error("AcceptToMemoryPool() : transaction with out-of-bounds SigOpCount");
genesis 317
asciilifeform_let... 318 // Rather not work on nonstandard transactions
asciilifeform_let... 319 if (!IsStandard())
genesis 320 return error("AcceptToMemoryPool() : nonstandard transaction type");
genesis 321
genesis 322 // Do we already have it?
genesis 323 uint256 hash = GetHash();
genesis 324 CRITICAL_BLOCK(cs_mapTransactions)
genesis 325 if (mapTransactions.count(hash))
genesis 326 return false;
genesis 327 if (fCheckInputs)
genesis 328 if (txdb.ContainsTx(hash))
genesis 329 return false;
genesis 330
genesis 331 // Check for conflicts with in-memory transactions
genesis 332 CTransaction* ptxOld = NULL;
genesis 333 for (int i = 0; i < vin.size(); i++)
genesis 334 {
genesis 335 COutPoint outpoint = vin[i].prevout;
genesis 336 if (mapNextTx.count(outpoint))
genesis 337 {
genesis 338 // Disable replacement feature for now
genesis 339 return false;
genesis 340
genesis 341 // Allow replacing with a newer version of the same transaction
genesis 342 if (i != 0)
genesis 343 return false;
genesis 344 ptxOld = mapNextTx[outpoint].ptx;
genesis 345 if (ptxOld->IsFinal())
genesis 346 return false;
genesis 347 if (!IsNewerThan(*ptxOld))
genesis 348 return false;
genesis 349 for (int i = 0; i < vin.size(); i++)
genesis 350 {
genesis 351 COutPoint outpoint = vin[i].prevout;
genesis 352 if (!mapNextTx.count(outpoint) || mapNextTx[outpoint].ptx != ptxOld)
genesis 353 return false;
genesis 354 }
genesis 355 break;
genesis 356 }
genesis 357 }
genesis 358
genesis 359 if (fCheckInputs)
genesis 360 {
genesis 361 // Check against previous transactions
genesis 362 map<uint256, CTxIndex> mapUnused;
genesis 363 int64 nFees = 0;
genesis 364 bool fInvalid = false;
genesis 365 if (!ConnectInputs(txdb, mapUnused, CDiskTxPos(1,1,1), pindexBest, nFees, false, false, 0, fInvalid))
genesis 366 {
genesis 367 if (fInvalid)
genesis 368 return error("AcceptToMemoryPool() : FetchInputs found invalid tx %s", hash.ToString().substr(0,10).c_str());
genesis 369 return error("AcceptToMemoryPool() : ConnectInputs failed %s", hash.ToString().substr(0,10).c_str());
genesis 370 }
genesis 371
genesis 372 // Don't accept it if it can't get into a block
genesis 373 if (nFees < GetMinFee(1000, true, true))
genesis 374 return error("AcceptToMemoryPool() : not enough fees");
genesis 375
genesis 376 // Continuously rate-limit free transactions
genesis 377 // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
genesis 378 // be annoying or make other's transactions take longer to confirm.
genesis 379 if (nFees < MIN_RELAY_TX_FEE)
genesis 380 {
genesis 381 static CCriticalSection cs;
genesis 382 static double dFreeCount;
genesis 383 static int64 nLastTime;
genesis 384 int64 nNow = GetTime();
genesis 385
genesis 386 CRITICAL_BLOCK(cs)
genesis 387 {
genesis 388 // Use an exponentially decaying ~10-minute window:
genesis 389 dFreeCount *= pow(1.0 - 1.0/600.0, (double)(nNow - nLastTime));
genesis 390 nLastTime = nNow;
genesis 391 // -limitfreerelay unit is thousand-bytes-per-minute
genesis 392 // At default rate it would take over a month to fill 1GB
genesis 393 if (dFreeCount > GetArg("-limitfreerelay", 15)*10*1000 && !IsFromMe(*this))
genesis 394 return error("AcceptToMemoryPool() : free transaction rejected by rate limiter");
genesis 395 if (fDebug)
genesis 396 printf("Rate limit dFreeCount: %g => %g\n", dFreeCount, dFreeCount+nSize);
genesis 397 dFreeCount += nSize;
genesis 398 }
genesis 399 }
genesis 400 }
genesis 401
genesis 402 // Store transaction in memory
genesis 403 CRITICAL_BLOCK(cs_mapTransactions)
genesis 404 {
genesis 405 if (ptxOld)
genesis 406 {
genesis 407 printf("AcceptToMemoryPool() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
genesis 408 ptxOld->RemoveFromMemoryPool();
genesis 409 }
genesis 410 AddToMemoryPoolUnchecked();
genesis 411 }
genesis 412
genesis 413 ///// are we sure this is ok when loading transactions or restoring block txes
genesis 414 // If updated, erase old tx from wallet
genesis 415 if (ptxOld)
genesis 416 EraseFromWallets(ptxOld->GetHash());
genesis 417
genesis 418 printf("AcceptToMemoryPool(): accepted %s\n", hash.ToString().substr(0,10).c_str());
genesis 419 return true;
genesis 420 }
genesis 421
genesis 422 bool CTransaction::AcceptToMemoryPool(bool fCheckInputs, bool* pfMissingInputs)
genesis 423 {
genesis 424 CTxDB txdb("r");
genesis 425 return AcceptToMemoryPool(txdb, fCheckInputs, pfMissingInputs);
genesis 426 }
genesis 427
genesis 428 bool CTransaction::AddToMemoryPoolUnchecked()
genesis 429 {
genesis 430 // Add to memory pool without checking anything. Don't call this directly,
genesis 431 // call AcceptToMemoryPool to properly check the transaction first.
genesis 432 CRITICAL_BLOCK(cs_mapTransactions)
genesis 433 {
genesis 434 uint256 hash = GetHash();
genesis 435 mapTransactions[hash] = *this;
genesis 436 for (int i = 0; i < vin.size(); i++)
genesis 437 mapNextTx[vin[i].prevout] = CInPoint(&mapTransactions[hash], i);
genesis 438 nTransactionsUpdated++;
genesis 439 }
genesis 440 return true;
genesis 441 }
genesis 442
genesis 443
genesis 444 bool CTransaction::RemoveFromMemoryPool()
genesis 445 {
genesis 446 // Remove transaction from memory pool
genesis 447 CRITICAL_BLOCK(cs_mapTransactions)
genesis 448 {
genesis 449 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 450 mapNextTx.erase(txin.prevout);
genesis 451 mapTransactions.erase(GetHash());
genesis 452 nTransactionsUpdated++;
genesis 453 }
genesis 454 return true;
genesis 455 }
genesis 456
genesis 457
genesis 458
genesis 459
genesis 460
genesis 461
genesis 462 int CMerkleTx::GetDepthInMainChain(int& nHeightRet) const
genesis 463 {
genesis 464 if (hashBlock == 0 || nIndex == -1)
genesis 465 return 0;
genesis 466
genesis 467 // Find the block it claims to be in
genesis 468 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashBlock);
genesis 469 if (mi == mapBlockIndex.end())
genesis 470 return 0;
genesis 471 CBlockIndex* pindex = (*mi).second;
genesis 472 if (!pindex || !pindex->IsInMainChain())
genesis 473 return 0;
genesis 474
genesis 475 // Make sure the merkle branch connects to this block
genesis 476 if (!fMerkleVerified)
genesis 477 {
genesis 478 if (CBlock::CheckMerkleBranch(GetHash(), vMerkleBranch, nIndex) != pindex->hashMerkleRoot)
genesis 479 return 0;
genesis 480 fMerkleVerified = true;
genesis 481 }
genesis 482
genesis 483 nHeightRet = pindex->nHeight;
genesis 484 return pindexBest->nHeight - pindex->nHeight + 1;
genesis 485 }
genesis 486
genesis 487
genesis 488 int CMerkleTx::GetBlocksToMaturity() const
genesis 489 {
genesis 490 if (!IsCoinBase())
genesis 491 return 0;
genesis 492 return max(0, (COINBASE_MATURITY+20) - GetDepthInMainChain());
genesis 493 }
genesis 494
genesis 495
genesis 496 bool CMerkleTx::AcceptToMemoryPool(CTxDB& txdb, bool fCheckInputs)
genesis 497 {
genesis 498 if (fClient)
genesis 499 {
genesis 500 if (!IsInMainChain() && !ClientConnectInputs())
genesis 501 return false;
genesis 502 return CTransaction::AcceptToMemoryPool(txdb, false);
genesis 503 }
genesis 504 else
genesis 505 {
genesis 506 return CTransaction::AcceptToMemoryPool(txdb, fCheckInputs);
genesis 507 }
genesis 508 }
genesis 509
genesis 510 bool CMerkleTx::AcceptToMemoryPool()
genesis 511 {
genesis 512 CTxDB txdb("r");
genesis 513 return AcceptToMemoryPool(txdb);
genesis 514 }
genesis 515
genesis 516
genesis 517
genesis 518 bool CWalletTx::AcceptWalletTransaction(CTxDB& txdb, bool fCheckInputs)
genesis 519 {
genesis 520 CRITICAL_BLOCK(cs_mapTransactions)
genesis 521 {
genesis 522 // Add previous supporting transactions first
genesis 523 BOOST_FOREACH(CMerkleTx& tx, vtxPrev)
genesis 524 {
genesis 525 if (!tx.IsCoinBase())
genesis 526 {
genesis 527 uint256 hash = tx.GetHash();
genesis 528 if (!mapTransactions.count(hash) && !txdb.ContainsTx(hash))
genesis 529 tx.AcceptToMemoryPool(txdb, fCheckInputs);
genesis 530 }
genesis 531 }
genesis 532 return AcceptToMemoryPool(txdb, fCheckInputs);
genesis 533 }
genesis 534 return false;
genesis 535 }
genesis 536
genesis 537 bool CWalletTx::AcceptWalletTransaction()
genesis 538 {
genesis 539 CTxDB txdb("r");
genesis 540 return AcceptWalletTransaction(txdb);
genesis 541 }
genesis 542
genesis 543 int CTxIndex::GetDepthInMainChain() const
genesis 544 {
genesis 545 // Read block header
genesis 546 CBlock block;
genesis 547 if (!block.ReadFromDisk(pos.nFile, pos.nBlockPos, false))
genesis 548 return 0;
genesis 549 // Find the block in the index
genesis 550 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(block.GetHash());
genesis 551 if (mi == mapBlockIndex.end())
genesis 552 return 0;
genesis 553 CBlockIndex* pindex = (*mi).second;
genesis 554 if (!pindex || !pindex->IsInMainChain())
genesis 555 return 0;
genesis 556 return 1 + nBestHeight - pindex->nHeight;
genesis 557 }
genesis 558
genesis 559
genesis 560
genesis 561
genesis 562
genesis 563
genesis 564
genesis 565
genesis 566
genesis 567
genesis 568 //////////////////////////////////////////////////////////////////////////////
genesis 569 //
genesis 570 // CBlock and CBlockIndex
genesis 571 //
genesis 572
genesis 573 bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
genesis 574 {
genesis 575 if (!fReadTransactions)
genesis 576 {
genesis 577 *this = pindex->GetBlockHeader();
genesis 578 return true;
genesis 579 }
genesis 580 if (!ReadFromDisk(pindex->nFile, pindex->nBlockPos, fReadTransactions))
genesis 581 return false;
genesis 582 if (GetHash() != pindex->GetBlockHash())
genesis 583 return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
genesis 584 return true;
genesis 585 }
genesis 586
genesis 587 int64 static GetBlockValue(int nHeight, int64 nFees)
genesis 588 {
genesis 589 int64 nSubsidy = 50 * COIN;
genesis 590
genesis 591 // Subsidy is cut in half every 4 years
genesis 592 nSubsidy >>= (nHeight / 210000);
genesis 593
genesis 594 return nSubsidy + nFees;
genesis 595 }
genesis 596
genesis 597 static const int64 nTargetTimespan = 14 * 24 * 60 * 60; // two weeks
genesis 598 static const int64 nTargetSpacing = 10 * 60;
genesis 599 static const int64 nInterval = nTargetTimespan / nTargetSpacing;
genesis 600
genesis 601 //
genesis 602 // minimum amount of work that could possibly be required nTime after
genesis 603 // minimum work required was nBase
genesis 604 //
genesis 605 unsigned int ComputeMinWork(unsigned int nBase, int64 nTime)
genesis 606 {
genesis 607 CBigNum bnResult;
genesis 608 bnResult.SetCompact(nBase);
genesis 609 while (nTime > 0 && bnResult < bnProofOfWorkLimit)
genesis 610 {
genesis 611 // Maximum 400% adjustment...
genesis 612 bnResult *= 4;
genesis 613 // ... in best-case exactly 4-times-normal target time
genesis 614 nTime -= nTargetTimespan*4;
genesis 615 }
genesis 616 if (bnResult > bnProofOfWorkLimit)
genesis 617 bnResult = bnProofOfWorkLimit;
genesis 618 return bnResult.GetCompact();
genesis 619 }
genesis 620
genesis 621 unsigned int static GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlock *pblock)
genesis 622 {
genesis 623 unsigned int nProofOfWorkLimit = bnProofOfWorkLimit.GetCompact();
genesis 624
genesis 625 // Genesis block
genesis 626 if (pindexLast == NULL)
genesis 627 return nProofOfWorkLimit;
genesis 628
genesis 629 // Only change once per interval
genesis 630 if ((pindexLast->nHeight+1) % nInterval != 0)
genesis 631 {
genesis 632 return pindexLast->nBits;
genesis 633 }
genesis 634
genesis 635 // Go back by what we want to be 14 days worth of blocks
genesis 636 const CBlockIndex* pindexFirst = pindexLast;
genesis 637 for (int i = 0; pindexFirst && i < nInterval-1; i++)
genesis 638 pindexFirst = pindexFirst->pprev;
genesis 639 assert(pindexFirst);
genesis 640
genesis 641 // Limit adjustment step
genesis 642 int64 nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime();
genesis 643 printf(" nActualTimespan = %"PRI64d" before bounds\n", nActualTimespan);
genesis 644 if (nActualTimespan < nTargetTimespan/4)
genesis 645 nActualTimespan = nTargetTimespan/4;
genesis 646 if (nActualTimespan > nTargetTimespan*4)
genesis 647 nActualTimespan = nTargetTimespan*4;
genesis 648
genesis 649 // Retarget
genesis 650 CBigNum bnNew;
genesis 651 bnNew.SetCompact(pindexLast->nBits);
genesis 652 bnNew *= nActualTimespan;
genesis 653 bnNew /= nTargetTimespan;
genesis 654
genesis 655 if (bnNew > bnProofOfWorkLimit)
genesis 656 bnNew = bnProofOfWorkLimit;
genesis 657
genesis 658 /// debug print
genesis 659 printf("GetNextWorkRequired RETARGET\n");
genesis 660 printf("nTargetTimespan = %"PRI64d" nActualTimespan = %"PRI64d"\n", nTargetTimespan, nActualTimespan);
genesis 661 printf("Before: %08x %s\n", pindexLast->nBits, CBigNum().SetCompact(pindexLast->nBits).getuint256().ToString().c_str());
genesis 662 printf("After: %08x %s\n", bnNew.GetCompact(), bnNew.getuint256().ToString().c_str());
genesis 663
genesis 664 return bnNew.GetCompact();
genesis 665 }
genesis 666
genesis 667 bool CheckProofOfWork(uint256 hash, unsigned int nBits)
genesis 668 {
genesis 669 CBigNum bnTarget;
genesis 670 bnTarget.SetCompact(nBits);
genesis 671
genesis 672 // Check range
genesis 673 if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
genesis 674 return error("CheckProofOfWork() : nBits below minimum work");
genesis 675
genesis 676 // Check proof of work matches claimed amount
genesis 677 if (hash > bnTarget.getuint256())
genesis 678 return error("CheckProofOfWork() : hash doesn't match nBits");
genesis 679
genesis 680 return true;
genesis 681 }
genesis 682
genesis 683 // Return maximum amount of blocks that other nodes claim to have
genesis 684 int GetNumBlocksOfPeers()
genesis 685 {
genesis 686 return std::max(cPeerBlockCounts.median(), Checkpoints::GetTotalBlocksEstimate());
genesis 687 }
genesis 688
genesis 689 bool IsInitialBlockDownload()
genesis 690 {
genesis 691 if (pindexBest == NULL || nBestHeight < Checkpoints::GetTotalBlocksEstimate())
genesis 692 return true;
genesis 693 static int64 nLastUpdate;
genesis 694 static CBlockIndex* pindexLastBest;
genesis 695 if (pindexBest != pindexLastBest)
genesis 696 {
genesis 697 pindexLastBest = pindexBest;
genesis 698 nLastUpdate = GetTime();
genesis 699 }
genesis 700 return (GetTime() - nLastUpdate < 10 &&
genesis 701 pindexBest->GetBlockTime() < GetTime() - 24 * 60 * 60);
genesis 702 }
genesis 703
genesis 704 void static InvalidChainFound(CBlockIndex* pindexNew)
genesis 705 {
genesis 706 if (pindexNew->bnChainWork > bnBestInvalidWork)
genesis 707 {
genesis 708 bnBestInvalidWork = pindexNew->bnChainWork;
genesis 709 CTxDB().WriteBestInvalidWork(bnBestInvalidWork);
genesis 710 MainFrameRepaint();
genesis 711 }
genesis 712 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 713 printf("InvalidChainFound: current best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
genesis 714 if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
genesis 715 printf("InvalidChainFound: WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.\n");
genesis 716 }
genesis 717
genesis 718
genesis 719
genesis 720
genesis 721
genesis 722
genesis 723
genesis 724
genesis 725
genesis 726
genesis 727
genesis 728 bool CTransaction::DisconnectInputs(CTxDB& txdb)
genesis 729 {
genesis 730 // Relinquish previous transactions' spent pointers
genesis 731 if (!IsCoinBase())
genesis 732 {
genesis 733 BOOST_FOREACH(const CTxIn& txin, vin)
genesis 734 {
genesis 735 COutPoint prevout = txin.prevout;
genesis 736
genesis 737 // Get prev txindex from disk
genesis 738 CTxIndex txindex;
genesis 739 if (!txdb.ReadTxIndex(prevout.hash, txindex))
genesis 740 return error("DisconnectInputs() : ReadTxIndex failed");
genesis 741
genesis 742 if (prevout.n >= txindex.vSpent.size())
genesis 743 return error("DisconnectInputs() : prevout.n out of range");
genesis 744
genesis 745 // Mark outpoint as not spent
genesis 746 txindex.vSpent[prevout.n].SetNull();
genesis 747
genesis 748 // Write back
genesis 749 if (!txdb.UpdateTxIndex(prevout.hash, txindex))
genesis 750 return error("DisconnectInputs() : UpdateTxIndex failed");
genesis 751 }
genesis 752 }
genesis 753
genesis 754 // Remove transaction from index
genesis 755 // This can fail if a duplicate of this transaction was in a chain that got
genesis 756 // reorganized away. This is only possible if this transaction was completely
genesis 757 // spent, so erasing it would be a no-op anway.
genesis 758 txdb.EraseTxIndex(*this);
genesis 759
genesis 760 return true;
genesis 761 }
genesis 762
genesis 763
genesis 764 bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPool, CDiskTxPos posThisTx,
genesis 765 CBlockIndex* pindexBlock, int64& nFees, bool fBlock, bool fMiner, int64 nMinFee,
genesis 766 bool& fInvalid)
genesis 767 {
genesis 768 // FetchInputs can return false either because we just haven't seen some inputs
genesis 769 // (in which case the transaction should be stored as an orphan)
genesis 770 // or because the transaction is malformed (in which case the transaction should
genesis 771 // be dropped). If tx is definitely invalid, fInvalid will be set to true.
genesis 772 fInvalid = false;
genesis 773
genesis 774 // Take over previous transactions' spent pointers
genesis 775 // fBlock is true when this is called from AcceptBlock when a new best-block is added to the blockchain
genesis 776 // fMiner is true when called from the internal bitcoin miner
genesis 777 // ... both are false when called from CTransaction::AcceptToMemoryPool
genesis 778 if (!IsCoinBase())
genesis 779 {
genesis 780 int64 nValueIn = 0;
genesis 781 for (int i = 0; i < vin.size(); i++)
genesis 782 {
genesis 783 COutPoint prevout = vin[i].prevout;
genesis 784
genesis 785 // Read txindex
genesis 786 CTxIndex txindex;
genesis 787 bool fFound = true;
genesis 788 if ((fBlock || fMiner) && mapTestPool.count(prevout.hash))
genesis 789 {
genesis 790 // Get txindex from current proposed changes
genesis 791 txindex = mapTestPool[prevout.hash];
genesis 792 }
genesis 793 else
genesis 794 {
genesis 795 // Read txindex from txdb
genesis 796 fFound = txdb.ReadTxIndex(prevout.hash, txindex);
genesis 797 }
genesis 798 if (!fFound && (fBlock || fMiner))
genesis 799 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 800
genesis 801 // Read txPrev
genesis 802 CTransaction txPrev;
genesis 803 if (!fFound || txindex.pos == CDiskTxPos(1,1,1))
genesis 804 {
genesis 805 // Get prev tx from single transactions in memory
genesis 806 CRITICAL_BLOCK(cs_mapTransactions)
genesis 807 {
genesis 808 if (!mapTransactions.count(prevout.hash))
genesis 809 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 810 txPrev = mapTransactions[prevout.hash];
genesis 811 }
genesis 812 if (!fFound)
genesis 813 txindex.vSpent.resize(txPrev.vout.size());
genesis 814 }
genesis 815 else
genesis 816 {
genesis 817 // Get prev tx from disk
genesis 818 if (!txPrev.ReadFromDisk(txindex.pos))
genesis 819 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 820 }
genesis 821
genesis 822 if (prevout.n >= txPrev.vout.size() || prevout.n >= txindex.vSpent.size())
genesis 823 {
genesis 824 // Revisit this if/when transaction replacement is implemented and allows
genesis 825 // adding inputs:
genesis 826 fInvalid = true;
genesis 827 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 828 }
genesis 829
genesis 830 // If prev is coinbase, check that it's matured
genesis 831 if (txPrev.IsCoinBase())
genesis 832 for (CBlockIndex* pindex = pindexBlock; pindex && pindexBlock->nHeight - pindex->nHeight < COINBASE_MATURITY; pindex = pindex->pprev)
genesis 833 if (pindex->nBlockPos == txindex.pos.nBlockPos && pindex->nFile == txindex.pos.nFile)
genesis 834 return error("ConnectInputs() : tried to spend coinbase at depth %d", pindexBlock->nHeight - pindex->nHeight);
genesis 835
genesis 836 // Skip ECDSA signature verification when connecting blocks (fBlock=true)
genesis 837 // before the last blockchain checkpoint. This is safe because block merkle hashes are
genesis 838 // still computed and checked, and any change will be caught at the next checkpoint.
asciilifeform_add... 839 if (fVerifyAll || (!(fBlock && (nBestHeight < Checkpoints::GetTotalBlocksEstimate()))))
genesis 840 // Verify signature
genesis 841 if (!VerifySignature(txPrev, *this, i))
genesis 842 return DoS(100,error("ConnectInputs() : %s VerifySignature failed", GetHash().ToString().substr(0,10).c_str()));
genesis 843
genesis 844 // Check for conflicts (double-spend)
genesis 845 // This doesn't trigger the DoS code on purpose; if it did, it would make it easier
genesis 846 // for an attacker to attempt to split the network.
genesis 847 if (!txindex.vSpent[prevout.n].IsNull())
genesis 848 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 849
genesis 850 // Check for negative or overflow input values
genesis 851 nValueIn += txPrev.vout[prevout.n].nValue;
genesis 852 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
genesis 853 return DoS(100, error("ConnectInputs() : txin values out of range"));
genesis 854
genesis 855 // Mark outpoints as spent
genesis 856 txindex.vSpent[prevout.n] = posThisTx;
genesis 857
genesis 858 // Write back
genesis 859 if (fBlock || fMiner)
genesis 860 {
genesis 861 mapTestPool[prevout.hash] = txindex;
genesis 862 }
genesis 863 }
genesis 864
genesis 865 if (nValueIn < GetValueOut())
genesis 866 return DoS(100, error("ConnectInputs() : %s value in < value out", GetHash().ToString().substr(0,10).c_str()));
genesis 867
genesis 868 // Tally transaction fees
genesis 869 int64 nTxFee = nValueIn - GetValueOut();
genesis 870 if (nTxFee < 0)
genesis 871 return DoS(100, error("ConnectInputs() : %s nTxFee < 0", GetHash().ToString().substr(0,10).c_str()));
genesis 872 if (nTxFee < nMinFee)
genesis 873 return false;
genesis 874 nFees += nTxFee;
genesis 875 if (!MoneyRange(nFees))
genesis 876 return DoS(100, error("ConnectInputs() : nFees out of range"));
genesis 877 }
genesis 878
genesis 879 if (fBlock)
genesis 880 {
genesis 881 // Add transaction to changes
genesis 882 mapTestPool[GetHash()] = CTxIndex(posThisTx, vout.size());
genesis 883 }
genesis 884 else if (fMiner)
genesis 885 {
genesis 886 // Add transaction to test pool
genesis 887 mapTestPool[GetHash()] = CTxIndex(CDiskTxPos(1,1,1), vout.size());
genesis 888 }
genesis 889
genesis 890 return true;
genesis 891 }
genesis 892
genesis 893
genesis 894 bool CTransaction::ClientConnectInputs()
genesis 895 {
genesis 896 if (IsCoinBase())
genesis 897 return false;
genesis 898
genesis 899 // Take over previous transactions' spent pointers
genesis 900 CRITICAL_BLOCK(cs_mapTransactions)
genesis 901 {
genesis 902 int64 nValueIn = 0;
genesis 903 for (int i = 0; i < vin.size(); i++)
genesis 904 {
genesis 905 // Get prev tx from single transactions in memory
genesis 906 COutPoint prevout = vin[i].prevout;
genesis 907 if (!mapTransactions.count(prevout.hash))
genesis 908 return false;
genesis 909 CTransaction& txPrev = mapTransactions[prevout.hash];
genesis 910
genesis 911 if (prevout.n >= txPrev.vout.size())
genesis 912 return false;
genesis 913
genesis 914 // Verify signature
genesis 915 if (!VerifySignature(txPrev, *this, i))
genesis 916 return error("ConnectInputs() : VerifySignature failed");
genesis 917
genesis 918 ///// this is redundant with the mapNextTx stuff, not sure which I want to get rid of
genesis 919 ///// this has to go away now that posNext is gone
genesis 920 // // Check for conflicts
genesis 921 // if (!txPrev.vout[prevout.n].posNext.IsNull())
genesis 922 // return error("ConnectInputs() : prev tx already used");
genesis 923 //
genesis 924 // // Flag outpoints as used
genesis 925 // txPrev.vout[prevout.n].posNext = posThisTx;
genesis 926
genesis 927 nValueIn += txPrev.vout[prevout.n].nValue;
genesis 928
genesis 929 if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
genesis 930 return error("ClientConnectInputs() : txin values out of range");
genesis 931 }
genesis 932 if (GetValueOut() > nValueIn)
genesis 933 return false;
genesis 934 }
genesis 935
genesis 936 return true;
genesis 937 }
genesis 938
genesis 939
genesis 940
genesis 941
genesis 942 bool CBlock::DisconnectBlock(CTxDB& txdb, CBlockIndex* pindex)
genesis 943 {
genesis 944 // Disconnect in reverse order
genesis 945 for (int i = vtx.size()-1; i >= 0; i--)
genesis 946 if (!vtx[i].DisconnectInputs(txdb))
genesis 947 return false;
genesis 948
genesis 949 // Update block index on disk without changing it in memory.
genesis 950 // The memory index structure will be changed after the db commits.
genesis 951 if (pindex->pprev)
genesis 952 {
genesis 953 CDiskBlockIndex blockindexPrev(pindex->pprev);
genesis 954 blockindexPrev.hashNext = 0;
genesis 955 if (!txdb.WriteBlockIndex(blockindexPrev))
genesis 956 return error("DisconnectBlock() : WriteBlockIndex failed");
genesis 957 }
genesis 958
genesis 959 return true;
genesis 960 }
genesis 961
genesis 962 bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
genesis 963 {
genesis 964 // Check it again in case a previous version let a bad block in
genesis 965 if (!CheckBlock())
genesis 966 return false;
genesis 967
genesis 968 // Do not allow blocks that contain transactions which 'overwrite' older transactions,
genesis 969 // unless those are already completely spent.
genesis 970 // If such overwrites are allowed, coinbases and transactions depending upon those
genesis 971 // can be duplicated to remove the ability to spend the first instance -- even after
genesis 972 // being sent to another address.
genesis 973 // See BIP30 and http://r6.ca/blog/20120206T005236Z.html for more information.
genesis 974 // This logic is not necessary for memory pool transactions, as AcceptToMemoryPool
genesis 975 // already refuses previously-known transaction id's entirely.
genesis 976 // This rule applies to all blocks whose timestamp is after March 15, 2012, 0:00 UTC.
asciilifeform_let... 977 if (pindex->nTime > 1331769600)
genesis 978 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 979 {
genesis 980 CTxIndex txindexOld;
genesis 981 if (txdb.ReadTxIndex(tx.GetHash(), txindexOld))
genesis 982 BOOST_FOREACH(CDiskTxPos &pos, txindexOld.vSpent)
genesis 983 if (pos.IsNull())
genesis 984 return false;
genesis 985 }
genesis 986
genesis 987 //// issue here: it doesn't know the version
genesis 988 unsigned int nTxPos = pindex->nBlockPos + ::GetSerializeSize(CBlock(), SER_DISK) - 1 + GetSizeOfCompactSize(vtx.size());
genesis 989
genesis 990 map<uint256, CTxIndex> mapQueuedChanges;
genesis 991 int64 nFees = 0;
genesis 992 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 993 {
genesis 994 CDiskTxPos posThisTx(pindex->nFile, pindex->nBlockPos, nTxPos);
genesis 995 nTxPos += ::GetSerializeSize(tx, SER_DISK);
genesis 996
genesis 997 bool fInvalid;
genesis 998 if (!tx.ConnectInputs(txdb, mapQueuedChanges, posThisTx, pindex, nFees, true, false, 0, fInvalid))
genesis 999 return false;
genesis 1000 }
genesis 1001 // Write queued txindex changes
genesis 1002 for (map<uint256, CTxIndex>::iterator mi = mapQueuedChanges.begin(); mi != mapQueuedChanges.end(); ++mi)
genesis 1003 {
genesis 1004 if (!txdb.UpdateTxIndex((*mi).first, (*mi).second))
genesis 1005 return error("ConnectBlock() : UpdateTxIndex failed");
genesis 1006 }
genesis 1007
genesis 1008 if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
genesis 1009 return false;
genesis 1010
genesis 1011 // Update block index on disk without changing it in memory.
genesis 1012 // The memory index structure will be changed after the db commits.
genesis 1013 if (pindex->pprev)
genesis 1014 {
genesis 1015 CDiskBlockIndex blockindexPrev(pindex->pprev);
genesis 1016 blockindexPrev.hashNext = pindex->GetBlockHash();
genesis 1017 if (!txdb.WriteBlockIndex(blockindexPrev))
genesis 1018 return error("ConnectBlock() : WriteBlockIndex failed");
genesis 1019 }
genesis 1020
genesis 1021 // Watch for transactions paying to me
genesis 1022 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 1023 SyncWithWallets(tx, this, true);
genesis 1024
genesis 1025 return true;
genesis 1026 }
genesis 1027
genesis 1028 bool static Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
genesis 1029 {
genesis 1030 printf("REORGANIZE\n");
genesis 1031
genesis 1032 // Find the fork
genesis 1033 CBlockIndex* pfork = pindexBest;
genesis 1034 CBlockIndex* plonger = pindexNew;
genesis 1035 while (pfork != plonger)
genesis 1036 {
genesis 1037 while (plonger->nHeight > pfork->nHeight)
genesis 1038 if (!(plonger = plonger->pprev))
genesis 1039 return error("Reorganize() : plonger->pprev is null");
genesis 1040 if (pfork == plonger)
genesis 1041 break;
genesis 1042 if (!(pfork = pfork->pprev))
genesis 1043 return error("Reorganize() : pfork->pprev is null");
genesis 1044 }
genesis 1045
genesis 1046 // List of what to disconnect
genesis 1047 vector<CBlockIndex*> vDisconnect;
genesis 1048 for (CBlockIndex* pindex = pindexBest; pindex != pfork; pindex = pindex->pprev)
genesis 1049 vDisconnect.push_back(pindex);
genesis 1050
genesis 1051 // List of what to connect
genesis 1052 vector<CBlockIndex*> vConnect;
genesis 1053 for (CBlockIndex* pindex = pindexNew; pindex != pfork; pindex = pindex->pprev)
genesis 1054 vConnect.push_back(pindex);
genesis 1055 reverse(vConnect.begin(), vConnect.end());
genesis 1056
genesis 1057 // Disconnect shorter branch
genesis 1058 vector<CTransaction> vResurrect;
genesis 1059 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
genesis 1060 {
genesis 1061 CBlock block;
genesis 1062 if (!block.ReadFromDisk(pindex))
genesis 1063 return error("Reorganize() : ReadFromDisk for disconnect failed");
genesis 1064 if (!block.DisconnectBlock(txdb, pindex))
genesis 1065 return error("Reorganize() : DisconnectBlock failed");
genesis 1066
genesis 1067 // Queue memory transactions to resurrect
genesis 1068 BOOST_FOREACH(const CTransaction& tx, block.vtx)
genesis 1069 if (!tx.IsCoinBase())
genesis 1070 vResurrect.push_back(tx);
genesis 1071 }
genesis 1072
genesis 1073 // Connect longer branch
genesis 1074 vector<CTransaction> vDelete;
genesis 1075 for (int i = 0; i < vConnect.size(); i++)
genesis 1076 {
genesis 1077 CBlockIndex* pindex = vConnect[i];
genesis 1078 CBlock block;
genesis 1079 if (!block.ReadFromDisk(pindex))
genesis 1080 return error("Reorganize() : ReadFromDisk for connect failed");
genesis 1081 if (!block.ConnectBlock(txdb, pindex))
genesis 1082 {
genesis 1083 // Invalid block
genesis 1084 txdb.TxnAbort();
genesis 1085 return error("Reorganize() : ConnectBlock failed");
genesis 1086 }
genesis 1087
genesis 1088 // Queue memory transactions to delete
genesis 1089 BOOST_FOREACH(const CTransaction& tx, block.vtx)
genesis 1090 vDelete.push_back(tx);
genesis 1091 }
genesis 1092 if (!txdb.WriteHashBestChain(pindexNew->GetBlockHash()))
genesis 1093 return error("Reorganize() : WriteHashBestChain failed");
genesis 1094
genesis 1095 // Make sure it's successfully written to disk before changing memory structure
genesis 1096 if (!txdb.TxnCommit())
genesis 1097 return error("Reorganize() : TxnCommit failed");
genesis 1098
genesis 1099 // Disconnect shorter branch
genesis 1100 BOOST_FOREACH(CBlockIndex* pindex, vDisconnect)
genesis 1101 if (pindex->pprev)
genesis 1102 pindex->pprev->pnext = NULL;
genesis 1103
genesis 1104 // Connect longer branch
genesis 1105 BOOST_FOREACH(CBlockIndex* pindex, vConnect)
genesis 1106 if (pindex->pprev)
genesis 1107 pindex->pprev->pnext = pindex;
genesis 1108
genesis 1109 // Resurrect memory transactions that were in the disconnected branch
genesis 1110 BOOST_FOREACH(CTransaction& tx, vResurrect)
genesis 1111 tx.AcceptToMemoryPool(txdb, false);
genesis 1112
genesis 1113 // Delete redundant memory transactions that are in the connected branch
genesis 1114 BOOST_FOREACH(CTransaction& tx, vDelete)
genesis 1115 tx.RemoveFromMemoryPool();
genesis 1116
genesis 1117 return true;
genesis 1118 }
genesis 1119
genesis 1120
genesis 1121 bool CBlock::SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew)
genesis 1122 {
genesis 1123 uint256 hash = GetHash();
genesis 1124
genesis 1125 txdb.TxnBegin();
genesis 1126 if (pindexGenesisBlock == NULL && hash == hashGenesisBlock)
genesis 1127 {
genesis 1128 txdb.WriteHashBestChain(hash);
genesis 1129 if (!txdb.TxnCommit())
genesis 1130 return error("SetBestChain() : TxnCommit failed");
genesis 1131 pindexGenesisBlock = pindexNew;
genesis 1132 }
genesis 1133 else if (hashPrevBlock == hashBestChain)
genesis 1134 {
genesis 1135 // Adding to current best branch
genesis 1136 if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
genesis 1137 {
genesis 1138 txdb.TxnAbort();
genesis 1139 InvalidChainFound(pindexNew);
genesis 1140 return error("SetBestChain() : ConnectBlock failed");
genesis 1141 }
genesis 1142 if (!txdb.TxnCommit())
genesis 1143 return error("SetBestChain() : TxnCommit failed");
genesis 1144
genesis 1145 // Add to current best branch
genesis 1146 pindexNew->pprev->pnext = pindexNew;
genesis 1147
genesis 1148 // Delete redundant memory transactions
genesis 1149 BOOST_FOREACH(CTransaction& tx, vtx)
genesis 1150 tx.RemoveFromMemoryPool();
genesis 1151 }
genesis 1152 else
genesis 1153 {
genesis 1154 // New best branch
genesis 1155 if (!Reorganize(txdb, pindexNew))
genesis 1156 {
genesis 1157 txdb.TxnAbort();
genesis 1158 InvalidChainFound(pindexNew);
genesis 1159 return error("SetBestChain() : Reorganize failed");
genesis 1160 }
genesis 1161 }
genesis 1162
genesis 1163 // Update best block in wallet (so we can detect restored wallets)
genesis 1164 if (!IsInitialBlockDownload())
genesis 1165 {
genesis 1166 const CBlockLocator locator(pindexNew);
genesis 1167 ::SetBestChain(locator);
genesis 1168 }
genesis 1169
genesis 1170 // New best block
genesis 1171 hashBestChain = hash;
genesis 1172 pindexBest = pindexNew;
genesis 1173 nBestHeight = pindexBest->nHeight;
genesis 1174 bnBestChainWork = pindexNew->bnChainWork;
genesis 1175 nTimeBestReceived = GetTime();
genesis 1176 nTransactionsUpdated++;
genesis 1177 printf("SetBestChain: new best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
genesis 1178
genesis 1179 return true;
genesis 1180 }
genesis 1181
genesis 1182
genesis 1183 bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
genesis 1184 {
genesis 1185 // Check for duplicate
genesis 1186 uint256 hash = GetHash();
genesis 1187 if (mapBlockIndex.count(hash))
genesis 1188 return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
genesis 1189
genesis 1190 // Construct new block index object
genesis 1191 CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
genesis 1192 if (!pindexNew)
genesis 1193 return error("AddToBlockIndex() : new CBlockIndex failed");
genesis 1194 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.insert(make_pair(hash, pindexNew)).first;
genesis 1195 pindexNew->phashBlock = &((*mi).first);
genesis 1196 map<uint256, CBlockIndex*>::iterator miPrev = mapBlockIndex.find(hashPrevBlock);
genesis 1197 if (miPrev != mapBlockIndex.end())
genesis 1198 {
genesis 1199 pindexNew->pprev = (*miPrev).second;
genesis 1200 pindexNew->nHeight = pindexNew->pprev->nHeight + 1;
genesis 1201 }
genesis 1202 pindexNew->bnChainWork = (pindexNew->pprev ? pindexNew->pprev->bnChainWork : 0) + pindexNew->GetBlockWork();
genesis 1203
genesis 1204 CTxDB txdb;
genesis 1205 txdb.TxnBegin();
genesis 1206 txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
genesis 1207 if (!txdb.TxnCommit())
genesis 1208 return false;
genesis 1209
genesis 1210 // New best
genesis 1211 if (pindexNew->bnChainWork > bnBestChainWork)
genesis 1212 if (!SetBestChain(txdb, pindexNew))
genesis 1213 return false;
genesis 1214
genesis 1215 txdb.Close();
genesis 1216
genesis 1217 if (pindexNew == pindexBest)
genesis 1218 {
genesis 1219 // Notify UI to display prev block's coinbase if it was ours
genesis 1220 static uint256 hashPrevBestCoinBase;
genesis 1221 UpdatedTransaction(hashPrevBestCoinBase);
genesis 1222 hashPrevBestCoinBase = vtx[0].GetHash();
genesis 1223 }
genesis 1224
genesis 1225 MainFrameRepaint();
genesis 1226 return true;
genesis 1227 }
genesis 1228
genesis 1229
genesis 1230
genesis 1231
genesis 1232 bool CBlock::CheckBlock() const
genesis 1233 {
genesis 1234 // These are checks that are independent of context
genesis 1235 // that can be verified before saving an orphan block.
genesis 1236
genesis 1237 // Size limits
genesis 1238 if (vtx.empty() || vtx.size() > MAX_BLOCK_SIZE || ::GetSerializeSize(*this, SER_NETWORK) > MAX_BLOCK_SIZE)
genesis 1239 return DoS(100, error("CheckBlock() : size limits failed"));
genesis 1240
genesis 1241 // Check proof of work matches claimed amount
genesis 1242 if (!CheckProofOfWork(GetHash(), nBits))
genesis 1243 return DoS(50, error("CheckBlock() : proof of work failed"));
genesis 1244
genesis 1245 // Check timestamp
genesis 1246 if (GetBlockTime() > GetAdjustedTime() + 2 * 60 * 60)
genesis 1247 return error("CheckBlock() : block timestamp too far in the future");
genesis 1248
genesis 1249 // First transaction must be coinbase, the rest must not be
genesis 1250 if (vtx.empty() || !vtx[0].IsCoinBase())
genesis 1251 return DoS(100, error("CheckBlock() : first tx is not coinbase"));
genesis 1252 for (int i = 1; i < vtx.size(); i++)
genesis 1253 if (vtx[i].IsCoinBase())
genesis 1254 return DoS(100, error("CheckBlock() : more than one coinbase"));
genesis 1255
genesis 1256 // Check transactions
genesis 1257 BOOST_FOREACH(const CTransaction& tx, vtx)
genesis 1258 if (!tx.CheckTransaction())
genesis 1259 return DoS(tx.nDoS, error("CheckBlock() : CheckTransaction failed"));
genesis 1260
genesis 1261 // Check that it's not full of nonstandard transactions
genesis 1262 if (GetSigOpCount() > MAX_BLOCK_SIGOPS)
genesis 1263 return DoS(100, error("CheckBlock() : out-of-bounds SigOpCount"));
genesis 1264
genesis 1265 // Check merkleroot
genesis 1266 if (hashMerkleRoot != BuildMerkleTree())
genesis 1267 return DoS(100, error("CheckBlock() : hashMerkleRoot mismatch"));
genesis 1268
genesis 1269 return true;
genesis 1270 }
genesis 1271
genesis 1272 bool CBlock::AcceptBlock()
genesis 1273 {
genesis 1274 // Check for duplicate
genesis 1275 uint256 hash = GetHash();
genesis 1276 if (mapBlockIndex.count(hash))
genesis 1277 return error("AcceptBlock() : block already in mapBlockIndex");
genesis 1278
genesis 1279 // Get prev block index
genesis 1280 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock);
genesis 1281 if (mi == mapBlockIndex.end())
genesis 1282 return DoS(10, error("AcceptBlock() : prev block not found"));
genesis 1283 CBlockIndex* pindexPrev = (*mi).second;
genesis 1284 int nHeight = pindexPrev->nHeight+1;
genesis 1285
genesis 1286 // Check proof of work
genesis 1287 if (nBits != GetNextWorkRequired(pindexPrev, this))
genesis 1288 return DoS(100, error("AcceptBlock() : incorrect proof of work"));
genesis 1289
genesis 1290 // Check timestamp against prev
genesis 1291 if (GetBlockTime() <= pindexPrev->GetMedianTimePast())
genesis 1292 return error("AcceptBlock() : block's timestamp is too early");
genesis 1293
genesis 1294 // Check that all transactions are finalized
genesis 1295 BOOST_FOREACH(const CTransaction& tx, vtx)
genesis 1296 if (!tx.IsFinal(nHeight, GetBlockTime()))
genesis 1297 return DoS(10, error("AcceptBlock() : contains a non-final transaction"));
genesis 1298
genesis 1299 // Check that the block chain matches the known block chain up to a checkpoint
genesis 1300 if (!Checkpoints::CheckBlock(nHeight, hash))
genesis 1301 return DoS(100, error("AcceptBlock() : rejected by checkpoint lockin at %d", nHeight));
genesis 1302
genesis 1303 // Write block to history file
genesis 1304 if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK)))
genesis 1305 return error("AcceptBlock() : out of disk space");
genesis 1306 unsigned int nFile = -1;
genesis 1307 unsigned int nBlockPos = 0;
genesis 1308 if (!WriteToDisk(nFile, nBlockPos))
genesis 1309 return error("AcceptBlock() : WriteToDisk failed");
genesis 1310 if (!AddToBlockIndex(nFile, nBlockPos))
genesis 1311 return error("AcceptBlock() : AddToBlockIndex failed");
genesis 1312
genesis 1313 // Relay inventory, but don't relay old inventory during initial block download
genesis 1314 if (hashBestChain == hash)
genesis 1315 CRITICAL_BLOCK(cs_vNodes)
genesis 1316 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 1317 if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : 140700))
genesis 1318 pnode->PushInventory(CInv(MSG_BLOCK, hash));
genesis 1319
genesis 1320 return true;
genesis 1321 }
genesis 1322
genesis 1323 bool ProcessBlock(CNode* pfrom, CBlock* pblock)
genesis 1324 {
genesis 1325 // Check for duplicate
genesis 1326 uint256 hash = pblock->GetHash();
genesis 1327 if (mapBlockIndex.count(hash))
genesis 1328 return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,20).c_str());
genesis 1329
genesis 1330 // Preliminary checks
genesis 1331 if (!pblock->CheckBlock())
genesis 1332 return error("ProcessBlock() : CheckBlock FAILED");
genesis 1333
genesis 1334 CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(mapBlockIndex);
genesis 1335 if (pcheckpoint && pblock->hashPrevBlock != hashBestChain)
genesis 1336 {
genesis 1337 // Extra checks to prevent "fill up memory by spamming with bogus blocks"
genesis 1338 int64 deltaTime = pblock->GetBlockTime() - pcheckpoint->nTime;
genesis 1339 if (deltaTime < 0)
genesis 1340 {
genesis 1341 if (pfrom)
genesis 1342 pfrom->Misbehaving(100);
genesis 1343 return error("ProcessBlock() : block with timestamp before last checkpoint");
genesis 1344 }
genesis 1345 CBigNum bnNewBlock;
genesis 1346 bnNewBlock.SetCompact(pblock->nBits);
genesis 1347 CBigNum bnRequired;
genesis 1348 bnRequired.SetCompact(ComputeMinWork(pcheckpoint->nBits, deltaTime));
genesis 1349 if (bnNewBlock > bnRequired)
genesis 1350 {
genesis 1351 if (pfrom)
genesis 1352 pfrom->Misbehaving(100);
genesis 1353 return error("ProcessBlock() : block with too little proof-of-work");
genesis 1354 }
genesis 1355 }
genesis 1356
asciilifeform_orp... 1357 // If don't already have its previous block, throw it out!
genesis 1358 if (!mapBlockIndex.count(pblock->hashPrevBlock))
genesis 1359 {
asciilifeform_orp... 1360 printf("ProcessBlock: BASTARD BLOCK, prev=%s, DISCARDED\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
genesis 1361
genesis 1362 // Ask this guy to fill in what we're missing
genesis 1363 if (pfrom)
asciilifeform_orp... 1364 pfrom->PushGetBlocks(pindexBest, pblock->hashPrevBlock);
asciilifeform_orp... 1365
asciilifeform_orp... 1366 return true;
genesis 1367 }
genesis 1368
genesis 1369 // Store to disk
genesis 1370 if (!pblock->AcceptBlock())
genesis 1371 return error("ProcessBlock() : AcceptBlock FAILED");
genesis 1372
genesis 1373 printf("ProcessBlock: ACCEPTED\n");
genesis 1374 return true;
genesis 1375 }
genesis 1376
genesis 1377
genesis 1378
genesis 1379
genesis 1380
genesis 1381
genesis 1382
genesis 1383
genesis 1384 bool CheckDiskSpace(uint64 nAdditionalBytes)
genesis 1385 {
genesis 1386 uint64 nFreeBytesAvailable = filesystem::space(GetDataDir()).available;
genesis 1387
genesis 1388 // Check for 15MB because database could create another 10MB log file at any time
genesis 1389 if (nFreeBytesAvailable < (uint64)15000000 + nAdditionalBytes)
genesis 1390 {
genesis 1391 fShutdown = true;
genesis 1392 string strMessage = _("Warning: Disk space is low ");
genesis 1393 strMiscWarning = strMessage;
genesis 1394 printf("*** %s\n", strMessage.c_str());
genesis 1395 ThreadSafeMessageBox(strMessage, "Bitcoin", wxOK | wxICON_EXCLAMATION);
genesis 1396 CreateThread(Shutdown, NULL);
genesis 1397 return false;
genesis 1398 }
genesis 1399 return true;
genesis 1400 }
genesis 1401
genesis 1402 FILE* OpenBlockFile(unsigned int nFile, unsigned int nBlockPos, const char* pszMode)
genesis 1403 {
genesis 1404 if (nFile == -1)
genesis 1405 return NULL;
genesis 1406 FILE* file = fopen(strprintf("%s/blk%04d.dat", GetDataDir().c_str(), nFile).c_str(), pszMode);
genesis 1407 if (!file)
genesis 1408 return NULL;
genesis 1409 if (nBlockPos != 0 && !strchr(pszMode, 'a') && !strchr(pszMode, 'w'))
genesis 1410 {
genesis 1411 if (fseek(file, nBlockPos, SEEK_SET) != 0)
genesis 1412 {
genesis 1413 fclose(file);
genesis 1414 return NULL;
genesis 1415 }
genesis 1416 }
genesis 1417 return file;
genesis 1418 }
genesis 1419
genesis 1420 static unsigned int nCurrentBlockFile = 1;
genesis 1421
genesis 1422 FILE* AppendBlockFile(unsigned int& nFileRet)
genesis 1423 {
genesis 1424 nFileRet = 0;
genesis 1425 loop
genesis 1426 {
genesis 1427 FILE* file = OpenBlockFile(nCurrentBlockFile, 0, "ab");
genesis 1428 if (!file)
genesis 1429 return NULL;
genesis 1430 if (fseek(file, 0, SEEK_END) != 0)
genesis 1431 return NULL;
genesis 1432 // FAT32 filesize max 4GB, fseek and ftell max 2GB, so we must stay under 2GB
genesis 1433 if (ftell(file) < 0x7F000000 - MAX_SIZE)
genesis 1434 {
genesis 1435 nFileRet = nCurrentBlockFile;
genesis 1436 return file;
genesis 1437 }
genesis 1438 fclose(file);
genesis 1439 nCurrentBlockFile++;
genesis 1440 }
genesis 1441 }
genesis 1442
genesis 1443 bool LoadBlockIndex(bool fAllowNew)
genesis 1444 {
genesis 1445 //
genesis 1446 // Load block index
genesis 1447 //
genesis 1448 CTxDB txdb("cr");
genesis 1449 if (!txdb.LoadBlockIndex())
genesis 1450 return false;
genesis 1451 txdb.Close();
genesis 1452
genesis 1453 //
genesis 1454 // Init with genesis block
genesis 1455 //
genesis 1456 if (mapBlockIndex.empty())
genesis 1457 {
genesis 1458 if (!fAllowNew)
genesis 1459 return false;
genesis 1460
genesis 1461 // Genesis Block:
genesis 1462 // CBlock(hash=000000000019d6, ver=1, hashPrevBlock=00000000000000, hashMerkleRoot=4a5e1e, nTime=1231006505, nBits=1d00ffff, nNonce=2083236893, vtx=1)
genesis 1463 // CTransaction(hash=4a5e1e, ver=1, vin.size=1, vout.size=1, nLockTime=0)
genesis 1464 // CTxIn(COutPoint(000000, -1), coinbase 04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73)
genesis 1465 // CTxOut(nValue=50.00000000, scriptPubKey=0x5F1DF16B2B704C8A578D0B)
genesis 1466 // vMerkleTree: 4a5e1e
genesis 1467
genesis 1468 // Genesis block
genesis 1469 const char* pszTimestamp = "The Times 03/Jan/2009 Chancellor on brink of second bailout for banks";
genesis 1470 CTransaction txNew;
genesis 1471 txNew.vin.resize(1);
genesis 1472 txNew.vout.resize(1);
genesis 1473 txNew.vin[0].scriptSig = CScript() << 486604799 << CBigNum(4) << vector<unsigned char>((const unsigned char*)pszTimestamp, (const unsigned char*)pszTimestamp + strlen(pszTimestamp));
genesis 1474 txNew.vout[0].nValue = 50 * COIN;
genesis 1475 txNew.vout[0].scriptPubKey = CScript() << ParseHex("04678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5f") << OP_CHECKSIG;
genesis 1476 CBlock block;
genesis 1477 block.vtx.push_back(txNew);
genesis 1478 block.hashPrevBlock = 0;
genesis 1479 block.hashMerkleRoot = block.BuildMerkleTree();
genesis 1480 block.nVersion = 1;
genesis 1481 block.nTime = 1231006505;
genesis 1482 block.nBits = 0x1d00ffff;
genesis 1483 block.nNonce = 2083236893;
genesis 1484
genesis 1485 //// debug print
genesis 1486 printf("%s\n", block.GetHash().ToString().c_str());
genesis 1487 printf("%s\n", hashGenesisBlock.ToString().c_str());
genesis 1488 printf("%s\n", block.hashMerkleRoot.ToString().c_str());
genesis 1489 assert(block.hashMerkleRoot == uint256("0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b"));
genesis 1490 block.print();
genesis 1491 assert(block.GetHash() == hashGenesisBlock);
genesis 1492
genesis 1493 // Start new block file
genesis 1494 unsigned int nFile;
genesis 1495 unsigned int nBlockPos;
genesis 1496 if (!block.WriteToDisk(nFile, nBlockPos))
genesis 1497 return error("LoadBlockIndex() : writing genesis block to disk failed");
genesis 1498 if (!block.AddToBlockIndex(nFile, nBlockPos))
genesis 1499 return error("LoadBlockIndex() : genesis block not accepted");
genesis 1500 }
genesis 1501
genesis 1502 return true;
genesis 1503 }
genesis 1504
genesis 1505
genesis 1506
genesis 1507 void PrintBlockTree()
genesis 1508 {
genesis 1509 // precompute tree structure
genesis 1510 map<CBlockIndex*, vector<CBlockIndex*> > mapNext;
genesis 1511 for (map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.begin(); mi != mapBlockIndex.end(); ++mi)
genesis 1512 {
genesis 1513 CBlockIndex* pindex = (*mi).second;
genesis 1514 mapNext[pindex->pprev].push_back(pindex);
genesis 1515 // test
genesis 1516 //while (rand() % 3 == 0)
genesis 1517 // mapNext[pindex->pprev].push_back(pindex);
genesis 1518 }
genesis 1519
genesis 1520 vector<pair<int, CBlockIndex*> > vStack;
genesis 1521 vStack.push_back(make_pair(0, pindexGenesisBlock));
genesis 1522
genesis 1523 int nPrevCol = 0;
genesis 1524 while (!vStack.empty())
genesis 1525 {
genesis 1526 int nCol = vStack.back().first;
genesis 1527 CBlockIndex* pindex = vStack.back().second;
genesis 1528 vStack.pop_back();
genesis 1529
genesis 1530 // print split or gap
genesis 1531 if (nCol > nPrevCol)
genesis 1532 {
genesis 1533 for (int i = 0; i < nCol-1; i++)
genesis 1534 printf("| ");
genesis 1535 printf("|\\\n");
genesis 1536 }
genesis 1537 else if (nCol < nPrevCol)
genesis 1538 {
genesis 1539 for (int i = 0; i < nCol; i++)
genesis 1540 printf("| ");
genesis 1541 printf("|\n");
genesis 1542 }
genesis 1543 nPrevCol = nCol;
genesis 1544
genesis 1545 // print columns
genesis 1546 for (int i = 0; i < nCol; i++)
genesis 1547 printf("| ");
genesis 1548
genesis 1549 // print item
genesis 1550 CBlock block;
genesis 1551 block.ReadFromDisk(pindex);
genesis 1552 printf("%d (%u,%u) %s %s tx %d",
genesis 1553 pindex->nHeight,
genesis 1554 pindex->nFile,
genesis 1555 pindex->nBlockPos,
genesis 1556 block.GetHash().ToString().substr(0,20).c_str(),
genesis 1557 DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
genesis 1558 block.vtx.size());
genesis 1559
genesis 1560 PrintWallets(block);
genesis 1561
genesis 1562 // put the main timechain first
genesis 1563 vector<CBlockIndex*>& vNext = mapNext[pindex];
genesis 1564 for (int i = 0; i < vNext.size(); i++)
genesis 1565 {
genesis 1566 if (vNext[i]->pnext)
genesis 1567 {
genesis 1568 swap(vNext[0], vNext[i]);
genesis 1569 break;
genesis 1570 }
genesis 1571 }
genesis 1572
genesis 1573 // iterate children
genesis 1574 for (int i = 0; i < vNext.size(); i++)
genesis 1575 vStack.push_back(make_pair(nCol+i, vNext[i]));
genesis 1576 }
genesis 1577 }
genesis 1578
genesis 1579
genesis 1580
genesis 1581 //////////////////////////////////////////////////////////////////////////////
genesis 1582 //
bitcoin-asciilife... 1583 // Warnings (was: CAlert)
genesis 1584 //
genesis 1585
genesis 1586 string GetWarnings(string strFor)
genesis 1587 {
genesis 1588 int nPriority = 0;
genesis 1589 string strStatusBar;
genesis 1590 string strRPC;
genesis 1591 if (GetBoolArg("-testsafemode"))
genesis 1592 strRPC = "test";
genesis 1593
genesis 1594 // Misc warnings like out of disk space and clock is wrong
genesis 1595 if (strMiscWarning != "")
genesis 1596 {
genesis 1597 nPriority = 1000;
genesis 1598 strStatusBar = strMiscWarning;
genesis 1599 }
genesis 1600
genesis 1601 // Longer invalid proof-of-work chain
genesis 1602 if (pindexBest && bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6)
genesis 1603 {
genesis 1604 nPriority = 2000;
genesis 1605 strStatusBar = strRPC = "WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.";
genesis 1606 }
genesis 1607
genesis 1608 if (strFor == "statusbar")
genesis 1609 return strStatusBar;
genesis 1610 else if (strFor == "rpc")
genesis 1611 return strRPC;
genesis 1612 assert(!"GetWarnings() : invalid parameter");
genesis 1613 return "error";
genesis 1614 }
genesis 1615
genesis 1616
genesis 1617 //////////////////////////////////////////////////////////////////////////////
genesis 1618 //
genesis 1619 // Messages
genesis 1620 //
genesis 1621
genesis 1622
genesis 1623 bool static AlreadyHave(CTxDB& txdb, const CInv& inv)
genesis 1624 {
genesis 1625 switch (inv.type)
genesis 1626 {
asciilifeform_tx-... 1627 case MSG_TX: return mapTransactions.count(inv.hash) || txdb.ContainsTx(inv.hash);
asciilifeform_orp... 1628 case MSG_BLOCK: return mapBlockIndex.count(inv.hash);
genesis 1629 }
genesis 1630 // Don't know what it is, just say we already got one
genesis 1631 return true;
genesis 1632 }
genesis 1633
genesis 1634
genesis 1635
genesis 1636
genesis 1637 // The message start string is designed to be unlikely to occur in normal data.
genesis 1638 // The characters are rarely used upper ascii, not valid as UTF-8, and produce
genesis 1639 // a large 4-byte int at any alignment.
genesis 1640 unsigned char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
genesis 1641
genesis 1642
genesis 1643 bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
genesis 1644 {
genesis 1645 static map<unsigned int, vector<unsigned char> > mapReuseKey;
genesis 1646 RandAddSeedPerfmon();
genesis 1647 if (fDebug) {
genesis 1648 printf("%s ", DateTimeStrFormat("%x %H:%M:%S", GetTime()).c_str());
genesis 1649 printf("received: %s (%d bytes)\n", strCommand.c_str(), vRecv.size());
genesis 1650 }
genesis 1651 if (mapArgs.count("-dropmessagestest") && GetRand(atoi(mapArgs["-dropmessagestest"])) == 0)
genesis 1652 {
genesis 1653 printf("dropmessagestest DROPPING RECV MESSAGE\n");
genesis 1654 return true;
genesis 1655 }
genesis 1656
genesis 1657
genesis 1658
genesis 1659
genesis 1660
genesis 1661 if (strCommand == "version")
genesis 1662 {
genesis 1663 // Each connection can only send one version message
genesis 1664 if (pfrom->nVersion != 0)
genesis 1665 {
genesis 1666 pfrom->Misbehaving(1);
genesis 1667 return false;
genesis 1668 }
genesis 1669
genesis 1670 int64 nTime;
genesis 1671 CAddress addrMe;
genesis 1672 CAddress addrFrom;
genesis 1673 uint64 nNonce = 1;
genesis 1674 vRecv >> pfrom->nVersion >> pfrom->nServices >> nTime >> addrMe;
genesis 1675 if (pfrom->nVersion == 10300)
genesis 1676 pfrom->nVersion = 300;
genesis 1677 if (pfrom->nVersion >= 106 && !vRecv.empty())
genesis 1678 vRecv >> addrFrom >> nNonce;
genesis 1679 if (pfrom->nVersion >= 106 && !vRecv.empty())
genesis 1680 vRecv >> pfrom->strSubVer;
genesis 1681 if (pfrom->nVersion >= 209 && !vRecv.empty())
genesis 1682 vRecv >> pfrom->nStartingHeight;
genesis 1683
genesis 1684 if (pfrom->nVersion == 0)
genesis 1685 return false;
genesis 1686
genesis 1687 // Disconnect if we connected to ourself
genesis 1688 if (nNonce == nLocalHostNonce && nNonce > 1)
genesis 1689 {
genesis 1690 printf("connected to self at %s, disconnecting\n", pfrom->addr.ToString().c_str());
genesis 1691 pfrom->fDisconnect = true;
genesis 1692 return true;
genesis 1693 }
genesis 1694
genesis 1695 // Be shy and don't send version until we hear
genesis 1696 if (pfrom->fInbound)
genesis 1697 pfrom->PushVersion();
genesis 1698
genesis 1699 pfrom->fClient = !(pfrom->nServices & NODE_NETWORK);
genesis 1700
genesis 1701 AddTimeData(pfrom->addr.ip, nTime);
genesis 1702
genesis 1703 // Change version
genesis 1704 if (pfrom->nVersion >= 209)
genesis 1705 pfrom->PushMessage("verack");
genesis 1706 pfrom->vSend.SetVersion(min(pfrom->nVersion, VERSION));
genesis 1707 if (pfrom->nVersion < 209)
genesis 1708 pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
genesis 1709
genesis 1710 if (!pfrom->fInbound)
genesis 1711 {
genesis 1712 // Advertise our address
genesis 1713 if (addrLocalHost.IsRoutable() && !fUseProxy)
genesis 1714 {
genesis 1715 CAddress addr(addrLocalHost);
genesis 1716 addr.nTime = GetAdjustedTime();
genesis 1717 pfrom->PushAddress(addr);
genesis 1718 }
genesis 1719
genesis 1720 // Get recent addresses
genesis 1721 if (pfrom->nVersion >= 31402 || mapAddresses.size() < 1000)
genesis 1722 {
genesis 1723 pfrom->PushMessage("getaddr");
genesis 1724 pfrom->fGetAddr = true;
genesis 1725 }
genesis 1726 }
genesis 1727
genesis 1728 // Ask the first connected node for block updates
genesis 1729 static int nAskedForBlocks;
genesis 1730 if (!pfrom->fClient &&
genesis 1731 (pfrom->nVersion < 32000 || pfrom->nVersion >= 32400) &&
genesis 1732 (nAskedForBlocks < 1 || vNodes.size() <= 1))
genesis 1733 {
genesis 1734 nAskedForBlocks++;
genesis 1735 pfrom->PushGetBlocks(pindexBest, uint256(0));
genesis 1736 }
genesis 1737
genesis 1738 pfrom->fSuccessfullyConnected = true;
genesis 1739
genesis 1740 printf("version message: version %d, blocks=%d\n", pfrom->nVersion, pfrom->nStartingHeight);
genesis 1741
genesis 1742 cPeerBlockCounts.input(pfrom->nStartingHeight);
genesis 1743 }
genesis 1744
genesis 1745
genesis 1746 else if (pfrom->nVersion == 0)
genesis 1747 {
genesis 1748 // Must have a version message before anything else
genesis 1749 pfrom->Misbehaving(1);
genesis 1750 return false;
genesis 1751 }
genesis 1752
genesis 1753
genesis 1754 else if (strCommand == "verack")
genesis 1755 {
genesis 1756 pfrom->vRecv.SetVersion(min(pfrom->nVersion, VERSION));
genesis 1757 }
genesis 1758
genesis 1759
genesis 1760 else if (strCommand == "addr")
genesis 1761 {
genesis 1762 vector<CAddress> vAddr;
genesis 1763 vRecv >> vAddr;
genesis 1764
genesis 1765 // Don't want addr from older versions unless seeding
genesis 1766 if (pfrom->nVersion < 209)
genesis 1767 return true;
genesis 1768 if (pfrom->nVersion < 31402 && mapAddresses.size() > 1000)
genesis 1769 return true;
genesis 1770 if (vAddr.size() > 1000)
genesis 1771 {
genesis 1772 pfrom->Misbehaving(20);
genesis 1773 return error("message addr size() = %d", vAddr.size());
genesis 1774 }
genesis 1775
genesis 1776 // Store the new addresses
genesis 1777 CAddrDB addrDB;
genesis 1778 addrDB.TxnBegin();
genesis 1779 int64 nNow = GetAdjustedTime();
genesis 1780 int64 nSince = nNow - 10 * 60;
genesis 1781 BOOST_FOREACH(CAddress& addr, vAddr)
genesis 1782 {
genesis 1783 if (fShutdown)
genesis 1784 return true;
genesis 1785 // ignore IPv6 for now, since it isn't implemented anyway
genesis 1786 if (!addr.IsIPv4())
genesis 1787 continue;
genesis 1788 if (addr.nTime <= 100000000 || addr.nTime > nNow + 10 * 60)
genesis 1789 addr.nTime = nNow - 5 * 24 * 60 * 60;
genesis 1790 AddAddress(addr, 2 * 60 * 60, &addrDB);
genesis 1791 pfrom->AddAddressKnown(addr);
genesis 1792 if (addr.nTime > nSince && !pfrom->fGetAddr && vAddr.size() <= 10 && addr.IsRoutable())
genesis 1793 {
genesis 1794 // Relay to a limited number of other nodes
genesis 1795 CRITICAL_BLOCK(cs_vNodes)
genesis 1796 {
genesis 1797 // Use deterministic randomness to send to the same nodes for 24 hours
genesis 1798 // at a time so the setAddrKnowns of the chosen nodes prevent repeats
genesis 1799 static uint256 hashSalt;
genesis 1800 if (hashSalt == 0)
genesis 1801 RAND_bytes((unsigned char*)&hashSalt, sizeof(hashSalt));
genesis 1802 uint256 hashRand = hashSalt ^ (((int64)addr.ip)<<32) ^ ((GetTime()+addr.ip)/(24*60*60));
genesis 1803 hashRand = Hash(BEGIN(hashRand), END(hashRand));
genesis 1804 multimap<uint256, CNode*> mapMix;
genesis 1805 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 1806 {
genesis 1807 if (pnode->nVersion < 31402)
genesis 1808 continue;
genesis 1809 unsigned int nPointer;
genesis 1810 memcpy(&nPointer, &pnode, sizeof(nPointer));
genesis 1811 uint256 hashKey = hashRand ^ nPointer;
genesis 1812 hashKey = Hash(BEGIN(hashKey), END(hashKey));
genesis 1813 mapMix.insert(make_pair(hashKey, pnode));
genesis 1814 }
genesis 1815 int nRelayNodes = 2;
genesis 1816 for (multimap<uint256, CNode*>::iterator mi = mapMix.begin(); mi != mapMix.end() && nRelayNodes-- > 0; ++mi)
genesis 1817 ((*mi).second)->PushAddress(addr);
genesis 1818 }
genesis 1819 }
genesis 1820 }
genesis 1821 addrDB.TxnCommit(); // Save addresses (it's ok if this fails)
genesis 1822 if (vAddr.size() < 1000)
genesis 1823 pfrom->fGetAddr = false;
genesis 1824 }
genesis 1825
genesis 1826
genesis 1827 else if (strCommand == "inv")
genesis 1828 {
genesis 1829 vector<CInv> vInv;
genesis 1830 vRecv >> vInv;
genesis 1831 if (vInv.size() > 50000)
genesis 1832 {
genesis 1833 pfrom->Misbehaving(20);
genesis 1834 return error("message inv size() = %d", vInv.size());
genesis 1835 }
genesis 1836
genesis 1837 CTxDB txdb("r");
genesis 1838 BOOST_FOREACH(const CInv& inv, vInv)
genesis 1839 {
genesis 1840 if (fShutdown)
genesis 1841 return true;
genesis 1842 pfrom->AddInventoryKnown(inv);
genesis 1843
genesis 1844 bool fAlreadyHave = AlreadyHave(txdb, inv);
genesis 1845 if (fDebug)
genesis 1846 printf(" got inventory: %s %s\n", inv.ToString().c_str(), fAlreadyHave ? "have" : "new");
genesis 1847
genesis 1848 if (!fAlreadyHave)
genesis 1849 pfrom->AskFor(inv);
genesis 1850
genesis 1851 // Track requests for our stuff
genesis 1852 Inventory(inv.hash);
genesis 1853 }
genesis 1854 }
genesis 1855
genesis 1856
genesis 1857 else if (strCommand == "getdata")
genesis 1858 {
genesis 1859 vector<CInv> vInv;
genesis 1860 vRecv >> vInv;
genesis 1861 if (vInv.size() > 50000)
genesis 1862 {
genesis 1863 pfrom->Misbehaving(20);
genesis 1864 return error("message getdata size() = %d", vInv.size());
genesis 1865 }
genesis 1866
genesis 1867 BOOST_FOREACH(const CInv& inv, vInv)
genesis 1868 {
genesis 1869 if (fShutdown)
genesis 1870 return true;
genesis 1871 printf("received getdata for: %s\n", inv.ToString().c_str());
genesis 1872
genesis 1873 if (inv.type == MSG_BLOCK)
genesis 1874 {
genesis 1875 // Send block from disk
genesis 1876 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(inv.hash);
genesis 1877 if (mi != mapBlockIndex.end())
genesis 1878 {
genesis 1879 CBlock block;
genesis 1880 block.ReadFromDisk((*mi).second);
genesis 1881 pfrom->PushMessage("block", block);
genesis 1882
genesis 1883 // Trigger them to send a getblocks request for the next batch of inventory
genesis 1884 if (inv.hash == pfrom->hashContinue)
genesis 1885 {
genesis 1886 // Bypass PushInventory, this must send even if redundant,
genesis 1887 // and we want it right after the last block so they don't
genesis 1888 // wait for other stuff first.
genesis 1889 vector<CInv> vInv;
genesis 1890 vInv.push_back(CInv(MSG_BLOCK, hashBestChain));
genesis 1891 pfrom->PushMessage("inv", vInv);
genesis 1892 pfrom->hashContinue = 0;
genesis 1893 }
genesis 1894 }
genesis 1895 }
genesis 1896 else if (inv.IsKnownType())
genesis 1897 {
genesis 1898 // Send stream from relay memory
genesis 1899 CRITICAL_BLOCK(cs_mapRelay)
genesis 1900 {
genesis 1901 map<CInv, CDataStream>::iterator mi = mapRelay.find(inv);
genesis 1902 if (mi != mapRelay.end())
genesis 1903 pfrom->PushMessage(inv.GetCommand(), (*mi).second);
genesis 1904 }
genesis 1905 }
malleus_mikehearn... 1906 else
malleus_mikehearn... 1907 {
malleus_mikehearn... 1908 pfrom->Misbehaving(100);
malleus_mikehearn... 1909 return error("BANNED peer issuing unknown inv type.");
malleus_mikehearn... 1910 }
genesis 1911
genesis 1912 // Track requests for our stuff
genesis 1913 Inventory(inv.hash);
genesis 1914 }
genesis 1915 }
genesis 1916
genesis 1917
genesis 1918 else if (strCommand == "getblocks")
genesis 1919 {
genesis 1920 CBlockLocator locator;
genesis 1921 uint256 hashStop;
genesis 1922 vRecv >> locator >> hashStop;
genesis 1923
genesis 1924 // Find the last block the caller has in the main chain
genesis 1925 CBlockIndex* pindex = locator.GetBlockIndex();
genesis 1926
genesis 1927 // Send the rest of the chain
genesis 1928 if (pindex)
genesis 1929 pindex = pindex->pnext;
genesis 1930 int nLimit = 500 + locator.GetDistanceBack();
genesis 1931 unsigned int nBytes = 0;
genesis 1932 printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
genesis 1933 for (; pindex; pindex = pindex->pnext)
genesis 1934 {
genesis 1935 if (pindex->GetBlockHash() == hashStop)
genesis 1936 {
genesis 1937 printf(" getblocks stopping at %d %s (%u bytes)\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str(), nBytes);
genesis 1938 break;
genesis 1939 }
genesis 1940 pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
genesis 1941 CBlock block;
genesis 1942 block.ReadFromDisk(pindex, true);
genesis 1943 nBytes += block.GetSerializeSize(SER_NETWORK);
genesis 1944 if (--nLimit <= 0 || nBytes >= SendBufferSize()/2)
genesis 1945 {
genesis 1946 // When this block is requested, we'll send an inv that'll make them
genesis 1947 // getblocks the next batch of inventory.
genesis 1948 printf(" getblocks stopping at limit %d %s (%u bytes)\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str(), nBytes);
genesis 1949 pfrom->hashContinue = pindex->GetBlockHash();
genesis 1950 break;
genesis 1951 }
genesis 1952 }
genesis 1953 }
genesis 1954
genesis 1955
genesis 1956 else if (strCommand == "getheaders")
genesis 1957 {
genesis 1958 CBlockLocator locator;
genesis 1959 uint256 hashStop;
genesis 1960 vRecv >> locator >> hashStop;
genesis 1961
genesis 1962 CBlockIndex* pindex = NULL;
genesis 1963 if (locator.IsNull())
genesis 1964 {
genesis 1965 // If locator is null, return the hashStop block
genesis 1966 map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashStop);
genesis 1967 if (mi == mapBlockIndex.end())
genesis 1968 return true;
genesis 1969 pindex = (*mi).second;
genesis 1970 }
genesis 1971 else
genesis 1972 {
genesis 1973 // Find the last block the caller has in the main chain
genesis 1974 pindex = locator.GetBlockIndex();
genesis 1975 if (pindex)
genesis 1976 pindex = pindex->pnext;
genesis 1977 }
genesis 1978
genesis 1979 vector<CBlock> vHeaders;
genesis 1980 int nLimit = 2000 + locator.GetDistanceBack();
genesis 1981 printf("getheaders %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
genesis 1982 for (; pindex; pindex = pindex->pnext)
genesis 1983 {
genesis 1984 vHeaders.push_back(pindex->GetBlockHeader());
genesis 1985 if (--nLimit <= 0 || pindex->GetBlockHash() == hashStop)
genesis 1986 break;
genesis 1987 }
genesis 1988 pfrom->PushMessage("headers", vHeaders);
genesis 1989 }
genesis 1990
genesis 1991
genesis 1992 else if (strCommand == "tx")
genesis 1993 {
genesis 1994 vector<uint256> vWorkQueue;
genesis 1995 CDataStream vMsg(vRecv);
genesis 1996 CTransaction tx;
genesis 1997 vRecv >> tx;
genesis 1998
genesis 1999 CInv inv(MSG_TX, tx.GetHash());
genesis 2000 pfrom->AddInventoryKnown(inv);
genesis 2001
genesis 2002 bool fMissingInputs = false;
genesis 2003 if (tx.AcceptToMemoryPool(true, &fMissingInputs))
genesis 2004 {
genesis 2005 SyncWithWallets(tx, NULL, true);
genesis 2006 RelayMessage(inv, vMsg);
genesis 2007 mapAlreadyAskedFor.erase(inv);
genesis 2008 vWorkQueue.push_back(inv.hash);
genesis 2009 }
genesis 2010 else if (fMissingInputs)
genesis 2011 {
asciilifeform_tx-... 2012 printf("REJECTED orphan tx %s\n", inv.hash.ToString().substr(0,10).c_str());
genesis 2013 }
genesis 2014 if (tx.nDoS) pfrom->Misbehaving(tx.nDoS);
genesis 2015 }
genesis 2016
genesis 2017
genesis 2018 else if (strCommand == "block")
genesis 2019 {
genesis 2020 CBlock block;
genesis 2021 vRecv >> block;
genesis 2022
genesis 2023 printf("received block %s\n", block.GetHash().ToString().substr(0,20).c_str());
genesis 2024 // block.print();
genesis 2025
genesis 2026 CInv inv(MSG_BLOCK, block.GetHash());
genesis 2027 pfrom->AddInventoryKnown(inv);
genesis 2028
genesis 2029 if (ProcessBlock(pfrom, &block))
genesis 2030 mapAlreadyAskedFor.erase(inv);
genesis 2031 if (block.nDoS) pfrom->Misbehaving(block.nDoS);
genesis 2032 }
genesis 2033
genesis 2034
genesis 2035 else if (strCommand == "getaddr")
genesis 2036 {
genesis 2037 // Nodes rebroadcast an addr every 24 hours
genesis 2038 pfrom->vAddrToSend.clear();
genesis 2039 int64 nSince = GetAdjustedTime() - 3 * 60 * 60; // in the last 3 hours
genesis 2040 CRITICAL_BLOCK(cs_mapAddresses)
genesis 2041 {
genesis 2042 unsigned int nCount = 0;
genesis 2043 BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
genesis 2044 {
genesis 2045 const CAddress& addr = item.second;
genesis 2046 if (addr.nTime > nSince)
genesis 2047 nCount++;
genesis 2048 }
genesis 2049 BOOST_FOREACH(const PAIRTYPE(vector<unsigned char>, CAddress)& item, mapAddresses)
genesis 2050 {
genesis 2051 const CAddress& addr = item.second;
genesis 2052 if (addr.nTime > nSince && GetRand(nCount) < 2500)
genesis 2053 pfrom->PushAddress(addr);
genesis 2054 }
genesis 2055 }
genesis 2056 }
genesis 2057
genesis 2058
genesis 2059 else if (strCommand == "checkorder")
genesis 2060 {
genesis 2061 uint256 hashReply;
genesis 2062 vRecv >> hashReply;
genesis 2063
genesis 2064 if (!GetBoolArg("-allowreceivebyip"))
genesis 2065 {
genesis 2066 pfrom->PushMessage("reply", hashReply, (int)2, string(""));
genesis 2067 return true;
genesis 2068 }
genesis 2069
genesis 2070 CWalletTx order;
genesis 2071 vRecv >> order;
genesis 2072
genesis 2073 /// we have a chance to check the order here
genesis 2074
genesis 2075 // Keep giving the same key to the same ip until they use it
genesis 2076 if (!mapReuseKey.count(pfrom->addr.ip))
genesis 2077 pwalletMain->GetKeyFromPool(mapReuseKey[pfrom->addr.ip], true);
genesis 2078
genesis 2079 // Send back approval of order and pubkey to use
genesis 2080 CScript scriptPubKey;
genesis 2081 scriptPubKey << mapReuseKey[pfrom->addr.ip] << OP_CHECKSIG;
genesis 2082 pfrom->PushMessage("reply", hashReply, (int)0, scriptPubKey);
genesis 2083 }
genesis 2084
genesis 2085
genesis 2086 else if (strCommand == "reply")
genesis 2087 {
genesis 2088 uint256 hashReply;
genesis 2089 vRecv >> hashReply;
genesis 2090
genesis 2091 CRequestTracker tracker;
genesis 2092 CRITICAL_BLOCK(pfrom->cs_mapRequests)
genesis 2093 {
genesis 2094 map<uint256, CRequestTracker>::iterator mi = pfrom->mapRequests.find(hashReply);
genesis 2095 if (mi != pfrom->mapRequests.end())
genesis 2096 {
genesis 2097 tracker = (*mi).second;
genesis 2098 pfrom->mapRequests.erase(mi);
genesis 2099 }
genesis 2100 }
genesis 2101 if (!tracker.IsNull())
genesis 2102 tracker.fn(tracker.param1, vRecv);
genesis 2103 }
genesis 2104
genesis 2105
genesis 2106 else if (strCommand == "ping")
genesis 2107 {
genesis 2108 }
genesis 2109
genesis 2110
genesis 2111 else
genesis 2112 {
malleus_mikehearn... 2113 // He who comes to us with a turd, by the turd shall perish.
malleus_mikehearn... 2114 pfrom->Misbehaving(100);
malleus_mikehearn... 2115 return error("BANNED peer issuing heathen command.");
genesis 2116 }
genesis 2117
genesis 2118
genesis 2119 // Update the last seen time for this node's address
genesis 2120 if (pfrom->fNetworkNode)
genesis 2121 if (strCommand == "version" || strCommand == "addr" || strCommand == "inv" || strCommand == "getdata" || strCommand == "ping")
genesis 2122 AddressCurrentlyConnected(pfrom->addr);
genesis 2123
genesis 2124
genesis 2125 return true;
genesis 2126 }
genesis 2127
genesis 2128 bool ProcessMessages(CNode* pfrom)
genesis 2129 {
genesis 2130 CDataStream& vRecv = pfrom->vRecv;
genesis 2131 if (vRecv.empty())
genesis 2132 return true;
genesis 2133 //if (fDebug)
genesis 2134 // printf("ProcessMessages(%u bytes)\n", vRecv.size());
genesis 2135
genesis 2136 //
genesis 2137 // Message format
genesis 2138 // (4) message start
genesis 2139 // (12) command
genesis 2140 // (4) size
genesis 2141 // (4) checksum
genesis 2142 // (x) data
genesis 2143 //
genesis 2144
genesis 2145 loop
genesis 2146 {
genesis 2147 // Scan for message start
genesis 2148 CDataStream::iterator pstart = search(vRecv.begin(), vRecv.end(), BEGIN(pchMessageStart), END(pchMessageStart));
genesis 2149 int nHeaderSize = vRecv.GetSerializeSize(CMessageHeader());
genesis 2150 if (vRecv.end() - pstart < nHeaderSize)
genesis 2151 {
genesis 2152 if (vRecv.size() > nHeaderSize)
genesis 2153 {
genesis 2154 printf("\n\nPROCESSMESSAGE MESSAGESTART NOT FOUND\n\n");
genesis 2155 vRecv.erase(vRecv.begin(), vRecv.end() - nHeaderSize);
genesis 2156 }
genesis 2157 break;
genesis 2158 }
genesis 2159 if (pstart - vRecv.begin() > 0)
genesis 2160 printf("\n\nPROCESSMESSAGE SKIPPED %d BYTES\n\n", pstart - vRecv.begin());
genesis 2161 vRecv.erase(vRecv.begin(), pstart);
genesis 2162
genesis 2163 // Read header
genesis 2164 vector<char> vHeaderSave(vRecv.begin(), vRecv.begin() + nHeaderSize);
genesis 2165 CMessageHeader hdr;
genesis 2166 vRecv >> hdr;
genesis 2167 if (!hdr.IsValid())
genesis 2168 {
genesis 2169 printf("\n\nPROCESSMESSAGE: ERRORS IN HEADER %s\n\n\n", hdr.GetCommand().c_str());
genesis 2170 continue;
genesis 2171 }
genesis 2172 string strCommand = hdr.GetCommand();
genesis 2173
genesis 2174 // Message size
genesis 2175 unsigned int nMessageSize = hdr.nMessageSize;
genesis 2176 if (nMessageSize > MAX_SIZE)
genesis 2177 {
genesis 2178 printf("ProcessMessage(%s, %u bytes) : nMessageSize > MAX_SIZE\n", strCommand.c_str(), nMessageSize);
genesis 2179 continue;
genesis 2180 }
genesis 2181 if (nMessageSize > vRecv.size())
genesis 2182 {
genesis 2183 // Rewind and wait for rest of message
genesis 2184 vRecv.insert(vRecv.begin(), vHeaderSave.begin(), vHeaderSave.end());
genesis 2185 break;
genesis 2186 }
genesis 2187
genesis 2188 // Checksum
genesis 2189 if (vRecv.GetVersion() >= 209)
genesis 2190 {
genesis 2191 uint256 hash = Hash(vRecv.begin(), vRecv.begin() + nMessageSize);
genesis 2192 unsigned int nChecksum = 0;
genesis 2193 memcpy(&nChecksum, &hash, sizeof(nChecksum));
genesis 2194 if (nChecksum != hdr.nChecksum)
genesis 2195 {
genesis 2196 printf("ProcessMessage(%s, %u bytes) : CHECKSUM ERROR nChecksum=%08x hdr.nChecksum=%08x\n",
genesis 2197 strCommand.c_str(), nMessageSize, nChecksum, hdr.nChecksum);
genesis 2198 continue;
genesis 2199 }
genesis 2200 }
genesis 2201
genesis 2202 // Copy message to its own buffer
genesis 2203 CDataStream vMsg(vRecv.begin(), vRecv.begin() + nMessageSize, vRecv.nType, vRecv.nVersion);
genesis 2204 vRecv.ignore(nMessageSize);
genesis 2205
genesis 2206 // Process message
genesis 2207 bool fRet = false;
genesis 2208 try
genesis 2209 {
genesis 2210 CRITICAL_BLOCK(cs_main)
genesis 2211 fRet = ProcessMessage(pfrom, strCommand, vMsg);
genesis 2212 if (fShutdown)
genesis 2213 return true;
genesis 2214 }
genesis 2215 catch (std::ios_base::failure& e)
genesis 2216 {
genesis 2217 if (strstr(e.what(), "end of data"))
genesis 2218 {
genesis 2219 // Allow exceptions from underlength message on vRecv
genesis 2220 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 2221 }
genesis 2222 else if (strstr(e.what(), "size too large"))
genesis 2223 {
genesis 2224 // Allow exceptions from overlong size
genesis 2225 printf("ProcessMessage(%s, %u bytes) : Exception '%s' caught\n", strCommand.c_str(), nMessageSize, e.what());
genesis 2226 }
genesis 2227 else
genesis 2228 {
genesis 2229 PrintExceptionContinue(&e, "ProcessMessage()");
genesis 2230 }
genesis 2231 }
genesis 2232 catch (std::exception& e) {
genesis 2233 PrintExceptionContinue(&e, "ProcessMessage()");
genesis 2234 } catch (...) {
genesis 2235 PrintExceptionContinue(NULL, "ProcessMessage()");
genesis 2236 }
genesis 2237
genesis 2238 if (!fRet)
genesis 2239 printf("ProcessMessage(%s, %u bytes) FAILED\n", strCommand.c_str(), nMessageSize);
genesis 2240 }
genesis 2241
genesis 2242 vRecv.Compact();
genesis 2243 return true;
genesis 2244 }
genesis 2245
genesis 2246
genesis 2247 bool SendMessages(CNode* pto, bool fSendTrickle)
genesis 2248 {
genesis 2249 CRITICAL_BLOCK(cs_main)
genesis 2250 {
genesis 2251 // Don't send anything until we get their version message
genesis 2252 if (pto->nVersion == 0)
genesis 2253 return true;
genesis 2254
genesis 2255 // Keep-alive ping
genesis 2256 if (pto->nLastSend && GetTime() - pto->nLastSend > 30 * 60 && pto->vSend.empty())
genesis 2257 pto->PushMessage("ping");
genesis 2258
genesis 2259 // Resend wallet transactions that haven't gotten in a block yet
genesis 2260 ResendWalletTransactions();
genesis 2261
genesis 2262 // Address refresh broadcast
genesis 2263 static int64 nLastRebroadcast;
genesis 2264 if (GetTime() - nLastRebroadcast > 24 * 60 * 60)
genesis 2265 {
genesis 2266 nLastRebroadcast = GetTime();
genesis 2267 CRITICAL_BLOCK(cs_vNodes)
genesis 2268 {
genesis 2269 BOOST_FOREACH(CNode* pnode, vNodes)
genesis 2270 {
genesis 2271 // Periodically clear setAddrKnown to allow refresh broadcasts
genesis 2272 pnode->setAddrKnown.clear();
genesis 2273
genesis 2274 // Rebroadcast our address
genesis 2275 if (addrLocalHost.IsRoutable() && !fUseProxy)
genesis 2276 {
genesis 2277 CAddress addr(addrLocalHost);
genesis 2278 addr.nTime = GetAdjustedTime();
genesis 2279 pnode->PushAddress(addr);
genesis 2280 }
genesis 2281 }
genesis 2282 }
genesis 2283 }
genesis 2284
genesis 2285 // Clear out old addresses periodically so it's not too much work at once
genesis 2286 static int64 nLastClear;
genesis 2287 if (nLastClear == 0)
genesis 2288 nLastClear = GetTime();
genesis 2289 if (GetTime() - nLastClear > 10 * 60 && vNodes.size() >= 3)
genesis 2290 {
genesis 2291 nLastClear = GetTime();
genesis 2292 CRITICAL_BLOCK(cs_mapAddresses)
genesis 2293 {
genesis 2294 CAddrDB addrdb;
genesis 2295 int64 nSince = GetAdjustedTime() - 14 * 24 * 60 * 60;
genesis 2296 for (map<vector<unsigned char>, CAddress>::iterator mi = mapAddresses.begin();
genesis 2297 mi != mapAddresses.end();)
genesis 2298 {
genesis 2299 const CAddress& addr = (*mi).second;
genesis 2300 if (addr.nTime < nSince)
genesis 2301 {
genesis 2302 if (mapAddresses.size() < 1000 || GetTime() > nLastClear + 20)
genesis 2303 break;
genesis 2304 addrdb.EraseAddress(addr);
genesis 2305 mapAddresses.erase(mi++);
genesis 2306 }
genesis 2307 else
genesis 2308 mi++;
genesis 2309 }
genesis 2310 }
genesis 2311 }
genesis 2312
genesis 2313
genesis 2314 //
genesis 2315 // Message: addr
genesis 2316 //
genesis 2317 if (fSendTrickle)
genesis 2318 {
genesis 2319 vector<CAddress> vAddr;
genesis 2320 vAddr.reserve(pto->vAddrToSend.size());
genesis 2321 BOOST_FOREACH(const CAddress& addr, pto->vAddrToSend)
genesis 2322 {
genesis 2323 // returns true if wasn't already contained in the set
genesis 2324 if (pto->setAddrKnown.insert(addr).second)
genesis 2325 {
genesis 2326 vAddr.push_back(addr);
genesis 2327 // receiver rejects addr messages larger than 1000
genesis 2328 if (vAddr.size() >= 1000)
genesis 2329 {
genesis 2330 pto->PushMessage("addr", vAddr);
genesis 2331 vAddr.clear();
genesis 2332 }
genesis 2333 }
genesis 2334 }
genesis 2335 pto->vAddrToSend.clear();
genesis 2336 if (!vAddr.empty())
genesis 2337 pto->PushMessage("addr", vAddr);
genesis 2338 }
genesis 2339
genesis 2340
genesis 2341 //
genesis 2342 // Message: inventory
genesis 2343 //
genesis 2344 vector<CInv> vInv;
genesis 2345 vector<CInv> vInvWait;
genesis 2346 CRITICAL_BLOCK(pto->cs_inventory)
genesis 2347 {
genesis 2348 vInv.reserve(pto->vInventoryToSend.size());
genesis 2349 vInvWait.reserve(pto->vInventoryToSend.size());
genesis 2350 BOOST_FOREACH(const CInv& inv, pto->vInventoryToSend)
genesis 2351 {
genesis 2352 if (pto->setInventoryKnown.count(inv))
genesis 2353 continue;
genesis 2354
genesis 2355 // trickle out tx inv to protect privacy
genesis 2356 if (inv.type == MSG_TX && !fSendTrickle)
genesis 2357 {
genesis 2358 // 1/4 of tx invs blast to all immediately
genesis 2359 static uint256 hashSalt;
genesis 2360 if (hashSalt == 0)
genesis 2361 RAND_bytes((unsigned char*)&hashSalt, sizeof(hashSalt));
genesis 2362 uint256 hashRand = inv.hash ^ hashSalt;
genesis 2363 hashRand = Hash(BEGIN(hashRand), END(hashRand));
genesis 2364 bool fTrickleWait = ((hashRand & 3) != 0);
genesis 2365
genesis 2366 // always trickle our own transactions
genesis 2367 if (!fTrickleWait)
genesis 2368 {
genesis 2369 CWalletTx wtx;
genesis 2370 if (GetTransaction(inv.hash, wtx))
genesis 2371 if (wtx.fFromMe)
genesis 2372 fTrickleWait = true;
genesis 2373 }
genesis 2374
genesis 2375 if (fTrickleWait)
genesis 2376 {
genesis 2377 vInvWait.push_back(inv);
genesis 2378 continue;
genesis 2379 }
genesis 2380 }
genesis 2381
genesis 2382 // returns true if wasn't already contained in the set
genesis 2383 if (pto->setInventoryKnown.insert(inv).second)
genesis 2384 {
genesis 2385 vInv.push_back(inv);
genesis 2386 if (vInv.size() >= 1000)
genesis 2387 {
genesis 2388 pto->PushMessage("inv", vInv);
genesis 2389 vInv.clear();
genesis 2390 }
genesis 2391 }
genesis 2392 }
genesis 2393 pto->vInventoryToSend = vInvWait;
genesis 2394 }
genesis 2395 if (!vInv.empty())
genesis 2396 pto->PushMessage("inv", vInv);
genesis 2397
genesis 2398
genesis 2399 //
genesis 2400 // Message: getdata
genesis 2401 //
genesis 2402 vector<CInv> vGetData;
genesis 2403 int64 nNow = GetTime() * 1000000;
genesis 2404 CTxDB txdb("r");
genesis 2405 while (!pto->mapAskFor.empty() && (*pto->mapAskFor.begin()).first <= nNow)
genesis 2406 {
genesis 2407 const CInv& inv = (*pto->mapAskFor.begin()).second;
genesis 2408 if (!AlreadyHave(txdb, inv))
genesis 2409 {
genesis 2410 printf("sending getdata: %s\n", inv.ToString().c_str());
genesis 2411 vGetData.push_back(inv);
genesis 2412 if (vGetData.size() >= 1000)
genesis 2413 {
genesis 2414 pto->PushMessage("getdata", vGetData);
genesis 2415 vGetData.clear();
genesis 2416 }
genesis 2417 }
genesis 2418 mapAlreadyAskedFor[inv] = nNow;
genesis 2419 pto->mapAskFor.erase(pto->mapAskFor.begin());
genesis 2420 }
genesis 2421 if (!vGetData.empty())
genesis 2422 pto->PushMessage("getdata", vGetData);
genesis 2423
genesis 2424 }
genesis 2425 return true;
genesis 2426 }
genesis 2427
genesis 2428
genesis 2429
genesis 2430
genesis 2431
genesis 2432
genesis 2433
genesis 2434
genesis 2435
genesis 2436
genesis 2437
genesis 2438
genesis 2439
genesis 2440
genesis 2441 //////////////////////////////////////////////////////////////////////////////
genesis 2442 //
genesis 2443 // BitcoinMiner
genesis 2444 //
genesis 2445
genesis 2446 int static FormatHashBlocks(void* pbuffer, unsigned int len)
genesis 2447 {
genesis 2448 unsigned char* pdata = (unsigned char*)pbuffer;
genesis 2449 unsigned int blocks = 1 + ((len + 8) / 64);
genesis 2450 unsigned char* pend = pdata + 64 * blocks;
genesis 2451 memset(pdata + len, 0, 64 * blocks - len);
genesis 2452 pdata[len] = 0x80;
genesis 2453 unsigned int bits = len * 8;
genesis 2454 pend[-1] = (bits >> 0) & 0xff;
genesis 2455 pend[-2] = (bits >> 8) & 0xff;
genesis 2456 pend[-3] = (bits >> 16) & 0xff;
genesis 2457 pend[-4] = (bits >> 24) & 0xff;
genesis 2458 return blocks;
genesis 2459 }
genesis 2460
genesis 2461 static const unsigned int pSHA256InitState[8] =
genesis 2462 {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
genesis 2463
genesis 2464 void SHA256Transform(void* pstate, void* pinput, const void* pinit)
genesis 2465 {
genesis 2466 SHA256_CTX ctx;
genesis 2467 unsigned char data[64];
genesis 2468
genesis 2469 SHA256_Init(&ctx);
genesis 2470
genesis 2471 for (int i = 0; i < 16; i++)
genesis 2472 ((uint32_t*)data)[i] = ByteReverse(((uint32_t*)pinput)[i]);
genesis 2473
genesis 2474 for (int i = 0; i < 8; i++)
genesis 2475 ctx.h[i] = ((uint32_t*)pinit)[i];
genesis 2476
genesis 2477 SHA256_Update(&ctx, data, sizeof(data));
genesis 2478 for (int i = 0; i < 8; i++)
genesis 2479 ((uint32_t*)pstate)[i] = ctx.h[i];
genesis 2480 }
genesis 2481
genesis 2482 //
genesis 2483 // ScanHash scans nonces looking for a hash with at least some zero bits.
genesis 2484 // It operates on big endian data. Caller does the byte reversing.
genesis 2485 // All input buffers are 16-byte aligned. nNonce is usually preserved
genesis 2486 // between calls, but periodically or if nNonce is 0xffff0000 or above,
genesis 2487 // the block is rebuilt and nNonce starts over at zero.
genesis 2488 //
genesis 2489 unsigned int static ScanHash_CryptoPP(char* pmidstate, char* pdata, char* phash1, char* phash, unsigned int& nHashesDone)
genesis 2490 {
genesis 2491 unsigned int& nNonce = *(unsigned int*)(pdata + 12);
genesis 2492 for (;;)
genesis 2493 {
genesis 2494 // Crypto++ SHA-256
genesis 2495 // Hash pdata using pmidstate as the starting state into
genesis 2496 // preformatted buffer phash1, then hash phash1 into phash
genesis 2497 nNonce++;
genesis 2498 SHA256Transform(phash1, pdata, pmidstate);
genesis 2499 SHA256Transform(phash, phash1, pSHA256InitState);
genesis 2500
genesis 2501 // Return the nonce if the hash has at least some zero bits,
genesis 2502 // caller will check if it has enough to reach the target
genesis 2503 if (((unsigned short*)phash)[14] == 0)
genesis 2504 return nNonce;
genesis 2505
genesis 2506 // If nothing found after trying for a while, return -1
genesis 2507 if ((nNonce & 0xffff) == 0)
genesis 2508 {
genesis 2509 nHashesDone = 0xffff+1;
genesis 2510 return -1;
genesis 2511 }
genesis 2512 }
genesis 2513 }
genesis 2514
genesis 2515 // Some explaining would be appreciated
genesis 2516 class COrphan
genesis 2517 {
genesis 2518 public:
genesis 2519 CTransaction* ptx;
genesis 2520 set<uint256> setDependsOn;
genesis 2521 double dPriority;
genesis 2522
genesis 2523 COrphan(CTransaction* ptxIn)
genesis 2524 {
genesis 2525 ptx = ptxIn;
genesis 2526 dPriority = 0;
genesis 2527 }
genesis 2528
genesis 2529 void print() const
genesis 2530 {
genesis 2531 printf("COrphan(hash=%s, dPriority=%.1f)\n", ptx->GetHash().ToString().substr(0,10).c_str(), dPriority);
genesis 2532 BOOST_FOREACH(uint256 hash, setDependsOn)
genesis 2533 printf(" setDependsOn %s\n", hash.ToString().substr(0,10).c_str());
genesis 2534 }
genesis 2535 };
genesis 2536
genesis 2537
genesis 2538 CBlock* CreateNewBlock(CReserveKey& reservekey)
genesis 2539 {
genesis 2540 CBlockIndex* pindexPrev = pindexBest;
genesis 2541
genesis 2542 // Create new block
genesis 2543 auto_ptr<CBlock> pblock(new CBlock());
genesis 2544 if (!pblock.get())
genesis 2545 return NULL;
genesis 2546
genesis 2547 // Create coinbase tx
genesis 2548 CTransaction txNew;
genesis 2549 txNew.vin.resize(1);
genesis 2550 txNew.vin[0].prevout.SetNull();
genesis 2551 txNew.vout.resize(1);
genesis 2552 txNew.vout[0].scriptPubKey << reservekey.GetReservedKey() << OP_CHECKSIG;
genesis 2553
genesis 2554 // Add our coinbase tx as first transaction
genesis 2555 pblock->vtx.push_back(txNew);
genesis 2556
genesis 2557 // Collect memory pool transactions into the block
genesis 2558 int64 nFees = 0;
genesis 2559 CRITICAL_BLOCK(cs_main)
genesis 2560 CRITICAL_BLOCK(cs_mapTransactions)
genesis 2561 {
genesis 2562 CTxDB txdb("r");
genesis 2563
genesis 2564 // Priority order to process transactions
genesis 2565 list<COrphan> vOrphan; // list memory doesn't move
genesis 2566 map<uint256, vector<COrphan*> > mapDependers;
genesis 2567 multimap<double, CTransaction*> mapPriority;
genesis 2568 for (map<uint256, CTransaction>::iterator mi = mapTransactions.begin(); mi != mapTransactions.end(); ++mi)
genesis 2569 {
genesis 2570 CTransaction& tx = (*mi).second;
genesis 2571 if (tx.IsCoinBase() || !tx.IsFinal())
genesis 2572 continue;
genesis 2573
genesis 2574 COrphan* porphan = NULL;
genesis 2575 double dPriority = 0;
genesis 2576 BOOST_FOREACH(const CTxIn& txin, tx.vin)
genesis 2577 {
genesis 2578 // Read prev transaction
genesis 2579 CTransaction txPrev;
genesis 2580 CTxIndex txindex;
genesis 2581 if (!txPrev.ReadFromDisk(txdb, txin.prevout, txindex))
genesis 2582 {
genesis 2583 // Has to wait for dependencies
genesis 2584 if (!porphan)
genesis 2585 {
genesis 2586 // Use list for automatic deletion
genesis 2587 vOrphan.push_back(COrphan(&tx));
genesis 2588 porphan = &vOrphan.back();
genesis 2589 }
genesis 2590 mapDependers[txin.prevout.hash].push_back(porphan);
genesis 2591 porphan->setDependsOn.insert(txin.prevout.hash);
genesis 2592 continue;
genesis 2593 }
genesis 2594 int64 nValueIn = txPrev.vout[txin.prevout.n].nValue;
genesis 2595
genesis 2596 // Read block header
genesis 2597 int nConf = txindex.GetDepthInMainChain();
genesis 2598
genesis 2599 dPriority += (double)nValueIn * nConf;
genesis 2600
genesis 2601 if (fDebug && GetBoolArg("-printpriority"))
genesis 2602 printf("priority nValueIn=%-12I64d nConf=%-5d dPriority=%-20.1f\n", nValueIn, nConf, dPriority);
genesis 2603 }
genesis 2604
genesis 2605 // Priority is sum(valuein * age) / txsize
genesis 2606 dPriority /= ::GetSerializeSize(tx, SER_NETWORK);
genesis 2607
genesis 2608 if (porphan)
genesis 2609 porphan->dPriority = dPriority;
genesis 2610 else
genesis 2611 mapPriority.insert(make_pair(-dPriority, &(*mi).second));
genesis 2612
genesis 2613 if (fDebug && GetBoolArg("-printpriority"))
genesis 2614 {
genesis 2615 printf("priority %-20.1f %s\n%s", dPriority, tx.GetHash().ToString().substr(0,10).c_str(), tx.ToString().c_str());
genesis 2616 if (porphan)
genesis 2617 porphan->print();
genesis 2618 printf("\n");
genesis 2619 }
genesis 2620 }
genesis 2621
genesis 2622 // Collect transactions into block
genesis 2623 map<uint256, CTxIndex> mapTestPool;
genesis 2624 uint64 nBlockSize = 1000;
genesis 2625 int nBlockSigOps = 100;
genesis 2626 while (!mapPriority.empty())
genesis 2627 {
genesis 2628 // Take highest priority transaction off priority queue
genesis 2629 double dPriority = -(*mapPriority.begin()).first;
genesis 2630 CTransaction& tx = *(*mapPriority.begin()).second;
genesis 2631 mapPriority.erase(mapPriority.begin());
genesis 2632
genesis 2633 // Size limits
genesis 2634 unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK);
genesis 2635 if (nBlockSize + nTxSize >= MAX_BLOCK_SIZE_GEN)
genesis 2636 continue;
genesis 2637 int nTxSigOps = tx.GetSigOpCount();
genesis 2638 if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS)
genesis 2639 continue;
genesis 2640
genesis 2641 // Transaction fee required depends on block size
genesis 2642 bool fAllowFree = (nBlockSize + nTxSize < 4000 || CTransaction::AllowFree(dPriority));
genesis 2643 int64 nMinFee = tx.GetMinFee(nBlockSize, fAllowFree);
genesis 2644
genesis 2645 // Connecting shouldn't fail due to dependency on other memory pool transactions
genesis 2646 // because we're already processing them in order of dependency
genesis 2647 map<uint256, CTxIndex> mapTestPoolTmp(mapTestPool);
genesis 2648 bool fInvalid;
genesis 2649 if (!tx.ConnectInputs(txdb, mapTestPoolTmp, CDiskTxPos(1,1,1), pindexPrev, nFees, false, true, nMinFee, fInvalid))
genesis 2650 continue;
genesis 2651 swap(mapTestPool, mapTestPoolTmp);
genesis 2652
genesis 2653 // Added
genesis 2654 pblock->vtx.push_back(tx);
genesis 2655 nBlockSize += nTxSize;
genesis 2656 nBlockSigOps += nTxSigOps;
genesis 2657
genesis 2658 // Add transactions that depend on this one to the priority queue
genesis 2659 uint256 hash = tx.GetHash();
genesis 2660 if (mapDependers.count(hash))
genesis 2661 {
genesis 2662 BOOST_FOREACH(COrphan* porphan, mapDependers[hash])
genesis 2663 {
genesis 2664 if (!porphan->setDependsOn.empty())
genesis 2665 {
genesis 2666 porphan->setDependsOn.erase(hash);
genesis 2667 if (porphan->setDependsOn.empty())
genesis 2668 mapPriority.insert(make_pair(-porphan->dPriority, porphan->ptx));
genesis 2669 }
genesis 2670 }
genesis 2671 }
genesis 2672 }
genesis 2673 }
genesis 2674 pblock->vtx[0].vout[0].nValue = GetBlockValue(pindexPrev->nHeight+1, nFees);
genesis 2675
genesis 2676 // Fill in header
genesis 2677 pblock->hashPrevBlock = pindexPrev->GetBlockHash();
genesis 2678 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
genesis 2679 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
genesis 2680 pblock->nBits = GetNextWorkRequired(pindexPrev, pblock.get());
genesis 2681 pblock->nNonce = 0;
genesis 2682
genesis 2683 return pblock.release();
genesis 2684 }
genesis 2685
genesis 2686
genesis 2687 void IncrementExtraNonce(CBlock* pblock, CBlockIndex* pindexPrev, unsigned int& nExtraNonce)
genesis 2688 {
genesis 2689 // Update nExtraNonce
genesis 2690 static uint256 hashPrevBlock;
genesis 2691 if (hashPrevBlock != pblock->hashPrevBlock)
genesis 2692 {
genesis 2693 nExtraNonce = 0;
genesis 2694 hashPrevBlock = pblock->hashPrevBlock;
genesis 2695 }
genesis 2696 ++nExtraNonce;
genesis 2697 pblock->vtx[0].vin[0].scriptSig = CScript() << pblock->nTime << CBigNum(nExtraNonce);
genesis 2698 pblock->hashMerkleRoot = pblock->BuildMerkleTree();
genesis 2699 }
genesis 2700
genesis 2701
genesis 2702 void FormatHashBuffers(CBlock* pblock, char* pmidstate, char* pdata, char* phash1)
genesis 2703 {
genesis 2704 //
genesis 2705 // Prebuild hash buffers
genesis 2706 //
genesis 2707 struct
genesis 2708 {
genesis 2709 struct unnamed2
genesis 2710 {
genesis 2711 int nVersion;
genesis 2712 uint256 hashPrevBlock;
genesis 2713 uint256 hashMerkleRoot;
genesis 2714 unsigned int nTime;
genesis 2715 unsigned int nBits;
genesis 2716 unsigned int nNonce;
genesis 2717 }
genesis 2718 block;
genesis 2719 unsigned char pchPadding0[64];
genesis 2720 uint256 hash1;
genesis 2721 unsigned char pchPadding1[64];
genesis 2722 }
genesis 2723 tmp;
genesis 2724 memset(&tmp, 0, sizeof(tmp));
genesis 2725
genesis 2726 tmp.block.nVersion = pblock->nVersion;
genesis 2727 tmp.block.hashPrevBlock = pblock->hashPrevBlock;
genesis 2728 tmp.block.hashMerkleRoot = pblock->hashMerkleRoot;
genesis 2729 tmp.block.nTime = pblock->nTime;
genesis 2730 tmp.block.nBits = pblock->nBits;
genesis 2731 tmp.block.nNonce = pblock->nNonce;
genesis 2732
genesis 2733 FormatHashBlocks(&tmp.block, sizeof(tmp.block));
genesis 2734 FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
genesis 2735
genesis 2736 // Byte swap all the input buffer
genesis 2737 for (int i = 0; i < sizeof(tmp)/4; i++)
genesis 2738 ((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
genesis 2739
genesis 2740 // Precalc the first half of the first hash, which stays constant
genesis 2741 SHA256Transform(pmidstate, &tmp.block, pSHA256InitState);
genesis 2742
genesis 2743 memcpy(pdata, &tmp.block, 128);
genesis 2744 memcpy(phash1, &tmp.hash1, 64);
genesis 2745 }
genesis 2746
genesis 2747
genesis 2748 bool CheckWork(CBlock* pblock, CWallet& wallet, CReserveKey& reservekey)
genesis 2749 {
genesis 2750 uint256 hash = pblock->GetHash();
genesis 2751 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
genesis 2752
genesis 2753 if (hash > hashTarget)
genesis 2754 return false;
genesis 2755
genesis 2756 //// debug print
genesis 2757 printf("BitcoinMiner:\n");
genesis 2758 printf("proof-of-work found \n hash: %s \ntarget: %s\n", hash.GetHex().c_str(), hashTarget.GetHex().c_str());
genesis 2759 pblock->print();
genesis 2760 printf("%s ", DateTimeStrFormat("%x %H:%M", GetTime()).c_str());
genesis 2761 printf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue).c_str());
genesis 2762
genesis 2763 // Found a solution
genesis 2764 CRITICAL_BLOCK(cs_main)
genesis 2765 {
genesis 2766 if (pblock->hashPrevBlock != hashBestChain)
genesis 2767 return error("BitcoinMiner : generated block is stale");
genesis 2768
genesis 2769 // Remove key from key pool
genesis 2770 reservekey.KeepKey();
genesis 2771
genesis 2772 // Track how many getdata requests this block gets
genesis 2773 CRITICAL_BLOCK(wallet.cs_wallet)
genesis 2774 wallet.mapRequestCount[pblock->GetHash()] = 0;
genesis 2775
genesis 2776 // Process this block the same as if we had received it from another node
genesis 2777 if (!ProcessBlock(NULL, pblock))
genesis 2778 return error("BitcoinMiner : ProcessBlock, block not accepted");
genesis 2779 }
genesis 2780
genesis 2781 return true;
genesis 2782 }
genesis 2783
genesis 2784 void static ThreadBitcoinMiner(void* parg);
genesis 2785
genesis 2786 void static BitcoinMiner(CWallet *pwallet)
genesis 2787 {
genesis 2788 printf("BitcoinMiner started\n");
genesis 2789 SetThreadPriority(THREAD_PRIORITY_LOWEST);
genesis 2790
genesis 2791 // Each thread has its own key and counter
genesis 2792 CReserveKey reservekey(pwallet);
genesis 2793 unsigned int nExtraNonce = 0;
genesis 2794
genesis 2795 while (fGenerateBitcoins)
genesis 2796 {
genesis 2797 if (AffinityBugWorkaround(ThreadBitcoinMiner))
genesis 2798 return;
genesis 2799 if (fShutdown)
genesis 2800 return;
genesis 2801 while (vNodes.empty() || IsInitialBlockDownload())
genesis 2802 {
genesis 2803 Sleep(1000);
genesis 2804 if (fShutdown)
genesis 2805 return;
genesis 2806 if (!fGenerateBitcoins)
genesis 2807 return;
genesis 2808 }
genesis 2809
genesis 2810
genesis 2811 //
genesis 2812 // Create new block
genesis 2813 //
genesis 2814 unsigned int nTransactionsUpdatedLast = nTransactionsUpdated;
genesis 2815 CBlockIndex* pindexPrev = pindexBest;
genesis 2816
genesis 2817 auto_ptr<CBlock> pblock(CreateNewBlock(reservekey));
genesis 2818 if (!pblock.get())
genesis 2819 return;
genesis 2820 IncrementExtraNonce(pblock.get(), pindexPrev, nExtraNonce);
genesis 2821
genesis 2822 printf("Running BitcoinMiner with %d transactions in block\n", pblock->vtx.size());
genesis 2823
genesis 2824
genesis 2825 //
genesis 2826 // Prebuild hash buffers
genesis 2827 //
genesis 2828 char pmidstatebuf[32+16]; char* pmidstate = alignup<16>(pmidstatebuf);
genesis 2829 char pdatabuf[128+16]; char* pdata = alignup<16>(pdatabuf);
genesis 2830 char phash1buf[64+16]; char* phash1 = alignup<16>(phash1buf);
genesis 2831
genesis 2832 FormatHashBuffers(pblock.get(), pmidstate, pdata, phash1);
genesis 2833
genesis 2834 unsigned int& nBlockTime = *(unsigned int*)(pdata + 64 + 4);
genesis 2835 unsigned int& nBlockNonce = *(unsigned int*)(pdata + 64 + 12);
genesis 2836
genesis 2837
genesis 2838 //
genesis 2839 // Search
genesis 2840 //
genesis 2841 int64 nStart = GetTime();
genesis 2842 uint256 hashTarget = CBigNum().SetCompact(pblock->nBits).getuint256();
genesis 2843 uint256 hashbuf[2];
genesis 2844 uint256& hash = *alignup<16>(hashbuf);
genesis 2845 loop
genesis 2846 {
genesis 2847 unsigned int nHashesDone = 0;
genesis 2848 unsigned int nNonceFound;
genesis 2849
genesis 2850 // Crypto++ SHA-256
genesis 2851 nNonceFound = ScanHash_CryptoPP(pmidstate, pdata + 64, phash1,
genesis 2852 (char*)&hash, nHashesDone);
genesis 2853
genesis 2854 // Check if something found
genesis 2855 if (nNonceFound != -1)
genesis 2856 {
genesis 2857 for (int i = 0; i < sizeof(hash)/4; i++)
genesis 2858 ((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]);
genesis 2859
genesis 2860 if (hash <= hashTarget)
genesis 2861 {
genesis 2862 // Found a solution
genesis 2863 pblock->nNonce = ByteReverse(nNonceFound);
genesis 2864 assert(hash == pblock->GetHash());
genesis 2865
genesis 2866 SetThreadPriority(THREAD_PRIORITY_NORMAL);
genesis 2867 CheckWork(pblock.get(), *pwalletMain, reservekey);
genesis 2868 SetThreadPriority(THREAD_PRIORITY_LOWEST);
genesis 2869 break;
genesis 2870 }
genesis 2871 }
genesis 2872
genesis 2873 // Meter hashes/sec
genesis 2874 static int64 nHashCounter;
genesis 2875 if (nHPSTimerStart == 0)
genesis 2876 {
genesis 2877 nHPSTimerStart = GetTimeMillis();
genesis 2878 nHashCounter = 0;
genesis 2879 }
genesis 2880 else
genesis 2881 nHashCounter += nHashesDone;
genesis 2882 if (GetTimeMillis() - nHPSTimerStart > 4000)
genesis 2883 {
genesis 2884 static CCriticalSection cs;
genesis 2885 CRITICAL_BLOCK(cs)
genesis 2886 {
genesis 2887 if (GetTimeMillis() - nHPSTimerStart > 4000)
genesis 2888 {
genesis 2889 dHashesPerSec = 1000.0 * nHashCounter / (GetTimeMillis() - nHPSTimerStart);
genesis 2890 nHPSTimerStart = GetTimeMillis();
genesis 2891 nHashCounter = 0;
genesis 2892 string strStatus = strprintf(" %.0f khash/s", dHashesPerSec/1000.0);
genesis 2893 UIThreadCall(boost::bind(CalledSetStatusBar, strStatus, 0));
genesis 2894 static int64 nLogTime;
genesis 2895 if (GetTime() - nLogTime > 30 * 60)
genesis 2896 {
genesis 2897 nLogTime = GetTime();
genesis 2898 printf("%s ", DateTimeStrFormat("%x %H:%M", GetTime()).c_str());
genesis 2899 printf("hashmeter %3d CPUs %6.0f khash/s\n", vnThreadsRunning[3], dHashesPerSec/1000.0);
genesis 2900 }
genesis 2901 }
genesis 2902 }
genesis 2903 }
genesis 2904
genesis 2905 // Check for stop or if block needs to be rebuilt
genesis 2906 if (fShutdown)
genesis 2907 return;
genesis 2908 if (!fGenerateBitcoins)
genesis 2909 return;
genesis 2910 if (fLimitProcessors && vnThreadsRunning[3] > nLimitProcessors)
genesis 2911 return;
genesis 2912 if (vNodes.empty())
genesis 2913 break;
genesis 2914 if (nBlockNonce >= 0xffff0000)
genesis 2915 break;
genesis 2916 if (nTransactionsUpdated != nTransactionsUpdatedLast && GetTime() - nStart > 60)
genesis 2917 break;
genesis 2918 if (pindexPrev != pindexBest)
genesis 2919 break;
genesis 2920
genesis 2921 // Update nTime every few seconds
genesis 2922 pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
genesis 2923 nBlockTime = ByteReverse(pblock->nTime);
genesis 2924 }
genesis 2925 }
genesis 2926 }
genesis 2927
genesis 2928 void static ThreadBitcoinMiner(void* parg)
genesis 2929 {
genesis 2930 CWallet* pwallet = (CWallet*)parg;
genesis 2931 try
genesis 2932 {
genesis 2933 vnThreadsRunning[3]++;
genesis 2934 BitcoinMiner(pwallet);
genesis 2935 vnThreadsRunning[3]--;
genesis 2936 }
genesis 2937 catch (std::exception& e) {
genesis 2938 vnThreadsRunning[3]--;
genesis 2939 PrintException(&e, "ThreadBitcoinMiner()");
genesis 2940 } catch (...) {
genesis 2941 vnThreadsRunning[3]--;
genesis 2942 PrintException(NULL, "ThreadBitcoinMiner()");
genesis 2943 }
genesis 2944 UIThreadCall(boost::bind(CalledSetStatusBar, "", 0));
genesis 2945 nHPSTimerStart = 0;
genesis 2946 if (vnThreadsRunning[3] == 0)
genesis 2947 dHashesPerSec = 0;
genesis 2948 printf("ThreadBitcoinMiner exiting, %d threads remaining\n", vnThreadsRunning[3]);
genesis 2949 }
genesis 2950
genesis 2951
genesis 2952 void GenerateBitcoins(bool fGenerate, CWallet* pwallet)
genesis 2953 {
genesis 2954 if (fGenerateBitcoins != fGenerate)
genesis 2955 {
genesis 2956 fGenerateBitcoins = fGenerate;
genesis 2957 WriteSetting("fGenerateBitcoins", fGenerateBitcoins);
genesis 2958 MainFrameRepaint();
genesis 2959 }
genesis 2960 if (fGenerateBitcoins)
genesis 2961 {
genesis 2962 int nProcessors = boost::thread::hardware_concurrency();
genesis 2963 printf("%d processors\n", nProcessors);
genesis 2964 if (nProcessors < 1)
genesis 2965 nProcessors = 1;
genesis 2966 if (fLimitProcessors && nProcessors > nLimitProcessors)
genesis 2967 nProcessors = nLimitProcessors;
genesis 2968 int nAddThreads = nProcessors - vnThreadsRunning[3];
genesis 2969 printf("Starting %d BitcoinMiner threads\n", nAddThreads);
genesis 2970 for (int i = 0; i < nAddThreads; i++)
genesis 2971 {
genesis 2972 if (!CreateThread(ThreadBitcoinMiner, pwallet))
genesis 2973 printf("Error: CreateThread(ThreadBitcoinMiner) failed\n");
genesis 2974 Sleep(10);
genesis 2975 }
genesis 2976 }
genesis 2977 }