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