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