void CBlock::print() const { printf("CBlock(hash=%s, ver=%d, pow_algo=%d, pow_hash=%s, hashPrevBlock=%s, hashMerkleRoot=%s, nTime=%u, nBits=%08x, nNonce=%u, vtx=%"PRIszu")\n", GetHash().ToString().c_str(), nVersion, GetAlgo(), GetPoWHash(GetAlgo()).ToString().c_str(), hashPrevBlock.ToString().c_str(), hashMerkleRoot.ToString().c_str(), nTime, nBits, nNonce, vtx.size()); for (unsigned int i = 0; i < vtx.size(); i++) { printf(" "); vtx[i].print(); } printf(" vMerkleTree: "); for (unsigned int i = 0; i < vMerkleTree.size(); i++) printf("%s ", vMerkleTree[i].ToString().c_str()); printf("\n"); }
bool CBlock::AcceptBlock() { AssertLockHeld(cs_main); if (nVersion > CURRENT_VERSION) return DoS(100, error("AcceptBlock() : reject unknown block version %d", nVersion)); // Check for duplicate uint256 hash = GetHash(); if (mapBlockIndex.count(hash)) return error("AcceptBlock() : block already in mapBlockIndex"); // Get prev block index map<uint256, CBlockIndex*>::iterator mi = mapBlockIndex.find(hashPrevBlock); if (mi == mapBlockIndex.end()) return DoS(10, error("AcceptBlock() : prev block not found")); CBlockIndex* pindexPrev = (*mi).second; int nHeight = pindexPrev->nHeight+1; if (IsProofOfStake() && nHeight < Params().FirstPOSBlock()) return DoS(100, error("AcceptBlock() : reject proof-of-stake at height <= %d", nHeight)); // Check coinbase timestamp if (GetBlockTime() > FutureDrift((int64_t)vtx[0].nTime, IsProofOfStake())) return DoS(50, error("AcceptBlock() : coinbase timestamp is too early")); // Check coinstake timestamp if (IsProofOfStake() && !CheckCoinStakeTimestamp(nHeight, GetBlockTime(), (int64_t)vtx[1].nTime)) return DoS(50, error("AcceptBlock() : coinstake timestamp violation nTimeBlock=%d nTimeTx=%u", GetBlockTime(), vtx[1].nTime)); // Check proof-of-work or proof-of-stake if (nBits != GetNextTargetRequired(pindexPrev, IsProofOfStake())) return DoS(100, error("AcceptBlock() : incorrect %s", IsProofOfWork() ? "proof-of-work" : "proof-of-stake")); // Check timestamp against prev LogPrintf("GetBlockTime(): %d, <=? pindexPrev->GetPastTimeLimit(): %d\nFutureDrift(GetBlockTime()): %d, <?pindexPrev->GetBlockTime(): %d\n",GetBlockTime(),pindexPrev->GetPastTimeLimit(),FutureDrift(GetBlockTime()),pindexPrev->GetBlockTime()); if (GetBlockTime() <= pindexPrev->GetPastTimeLimit() || FutureDrift(GetBlockTime(), IsProofOfStake()) < pindexPrev->GetBlockTime()) return error("AcceptBlock() : block's timestamp is too early"); // Check that all transactions are finalized BOOST_FOREACH(const CTransaction& tx, vtx) if (!IsFinalTx(tx, nHeight, GetBlockTime())) return DoS(10, error("AcceptBlock() : contains a non-final transaction")); // Check that the block chain matches the known block chain up to a checkpoint if (!Checkpoints::CheckHardened(nHeight, hash)) return DoS(100, error("AcceptBlock() : rejected by hardened checkpoint lock-in at %d", nHeight)); uint256 hashProof; // Verify hash target and signature of coinstake tx if (IsProofOfStake()) { uint256 targetProofOfStake; if (!CheckProofOfStake(pindexPrev, vtx[1], nBits, hashProof, targetProofOfStake)) { return error("AcceptBlock() : check proof-of-stake failed for block %s", hash.ToString()); } } // PoW is checked in CheckBlock() if (IsProofOfWork()) { hashProof = GetPoWHash(); } // Check that the block satisfies synchronized checkpoint if (!Checkpoints::CheckSync(nHeight)) return error("AcceptBlock() : rejected by synchronized checkpoint"); // Enforce rule that the coinbase starts with serialized block height CScript expect = CScript() << nHeight; if (vtx[0].vin[0].scriptSig.size() < expect.size() || !std::equal(expect.begin(), expect.end(), vtx[0].vin[0].scriptSig.begin())) return DoS(100, error("AcceptBlock() : block height mismatch in coinbase")); // Write block to history file if (!CheckDiskSpace(::GetSerializeSize(*this, SER_DISK, CLIENT_VERSION))) return error("AcceptBlock() : out of disk space"); unsigned int nFile = -1; unsigned int nBlockPos = 0; if (!WriteToDisk(nFile, nBlockPos)) return error("AcceptBlock() : WriteToDisk failed"); if (!AddToBlockIndex(nFile, nBlockPos, hashProof)) return error("AcceptBlock() : AddToBlockIndex failed"); // Relay inventory, but don't relay old inventory during initial block download int nBlockEstimate = Checkpoints::GetTotalBlocksEstimate(); if (hashBestChain == hash) { LOCK(cs_vNodes); BOOST_FOREACH(CNode* pnode, vNodes) if (nBestHeight > (pnode->nStartingHeight != -1 ? pnode->nStartingHeight - 2000 : nBlockEstimate)) pnode->PushInventory(CInv(MSG_BLOCK, hash)); }