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block index checking on load, extra redundant checks, misc refactoring

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This commit is contained in:
Satoshi Nakamoto
2010-08-28 00:49:30 +00:00
committed by Gavin Andresen
parent 43deefa435
commit 7a37c906a1
5 changed files with 126 additions and 62 deletions
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98
main.cpp
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@@ -500,8 +500,8 @@ bool CTransaction::AcceptTransaction(CTxDB& txdb, bool fCheckInputs, bool* pfMis
return error("AcceptTransaction() : CheckTransaction failed");
// To help v0.1.5 clients who would see it as a negative number
if (nLockTime > INT_MAX)
return error("AcceptTransaction() : not accepting nLockTime beyond 2038");
if ((int64)nLockTime > INT_MAX)
return error("AcceptTransaction() : not accepting nLockTime beyond 2038 yet");
// Do we already have it?
uint256 hash = GetHash();
@@ -519,6 +519,9 @@ bool CTransaction::AcceptTransaction(CTxDB& txdb, bool fCheckInputs, bool* pfMis
COutPoint outpoint = vin[i].prevout;
if (mapNextTx.count(outpoint))
{
// Disable replacement feature for now
return false;
// Allow replacing with a newer version of the same transaction
if (i != 0)
return false;
@@ -550,8 +553,8 @@ bool CTransaction::AcceptTransaction(CTxDB& txdb, bool fCheckInputs, bool* pfMis
{
if (ptxOld)
{
printf("mapTransaction.erase(%s) replacing with new version\n", ptxOld->GetHash().ToString().c_str());
mapTransactions.erase(ptxOld->GetHash());
printf("AcceptTransaction() : replacing tx %s with new version\n", ptxOld->GetHash().ToString().c_str());
ptxOld->RemoveFromMemoryPool();
}
AddToMemoryPool();
}
@@ -748,6 +751,12 @@ void ResendWalletTransactions()
if (fFirst)
return;
// Only do it if there's been a new block since last time
static int64 nLastTime;
if (nTimeBestReceived < nLastTime)
return;
nLastTime = GetTime();
// Rebroadcast any of our txes that aren't in a block yet
printf("ResendWalletTransactions()\n");
CTxDB txdb("r");
@@ -785,9 +794,13 @@ void ResendWalletTransactions()
// CBlock and CBlockIndex
//
bool CBlock::ReadFromDisk(const CBlockIndex* pblockindex, bool fReadTransactions)
bool CBlock::ReadFromDisk(const CBlockIndex* pindex, bool fReadTransactions)
{
return ReadFromDisk(pblockindex->nFile, pblockindex->nBlockPos, fReadTransactions);
if (!ReadFromDisk(pindex->nFile, pindex->nBlockPos, fReadTransactions))
return false;
if (GetHash() != pindex->GetBlockHash())
return error("CBlock::ReadFromDisk() : GetHash() doesn't match index");
return true;
}
uint256 GetOrphanRoot(const CBlock* pblock)
@@ -829,7 +842,7 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast)
assert(pindexFirst);
// Limit adjustment step
int64 nActualTimespan = (int64)pindexLast->nTime - (int64)pindexFirst->nTime;
int64 nActualTimespan = pindexLast->GetBlockTime() - pindexFirst->GetBlockTime();
printf(" nActualTimespan = %"PRI64d" before bounds\n", nActualTimespan);
if (nActualTimespan < nTargetTimespan/4)
nActualTimespan = nTargetTimespan/4;
@@ -854,6 +867,22 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast)
return bnNew.GetCompact();
}
bool CheckProofOfWork(uint256 hash, unsigned int nBits)
{
CBigNum bnTarget;
bnTarget.SetCompact(nBits);
// Check range
if (bnTarget <= 0 || bnTarget > bnProofOfWorkLimit)
return error("CheckProofOfWork() : nBits below minimum work");
// Check proof of work matches claimed amount
if (hash > bnTarget.getuint256())
return error("CheckProofOfWork() : hash doesn't match nBits");
return true;
}
bool IsInitialBlockDownload()
{
if (pindexBest == NULL)
@@ -866,7 +895,7 @@ bool IsInitialBlockDownload()
nLastUpdate = GetTime();
}
return (GetTime() - nLastUpdate < 10 &&
pindexBest->nTime < GetTime() - 24 * 60 * 60);
pindexBest->GetBlockTime() < GetTime() - 24 * 60 * 60);
}
bool IsLockdown()
@@ -884,8 +913,8 @@ void Lockdown(CBlockIndex* pindexNew)
CTxDB().WriteBestInvalidWork(bnBestInvalidWork);
MainFrameRepaint();
}
printf("Lockdown: invalid block=%s height=%d work=%s\n", pindexNew->GetBlockHash().ToString().substr(0,22).c_str(), pindexNew->nHeight, pindexNew->bnChainWork.ToString().c_str());
printf("Lockdown: current best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,22).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
printf("Lockdown: invalid block=%s height=%d work=%s\n", pindexNew->GetBlockHash().ToString().substr(0,20).c_str(), pindexNew->nHeight, pindexNew->bnChainWork.ToString().c_str());
printf("Lockdown: current best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
printf("Lockdown: IsLockdown()=%d\n", (IsLockdown() ? 1 : 0));
if (IsLockdown())
printf("Lockdown: WARNING: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade.\n");
@@ -1008,14 +1037,13 @@ bool CTransaction::ConnectInputs(CTxDB& txdb, map<uint256, CTxIndex>& mapTestPoo
nValueIn += txPrev.vout[prevout.n].nValue;
// Check for negative or overflow input values
if (txPrev.vout[prevout.n].nValue < 0)
return error("ConnectInputs() : txin.nValue negative");
if (txPrev.vout[prevout.n].nValue > MAX_MONEY)
return error("ConnectInputs() : txin.nValue too high");
if (nValueIn > MAX_MONEY)
return error("ConnectInputs() : txin total too high");
if (!MoneyRange(txPrev.vout[prevout.n].nValue) || !MoneyRange(nValueIn))
return error("ConnectInputs() : txin values out of range");
}
if (nValueIn < GetValueOut())
return error("ConnectInputs() : %s value in < value out", GetHash().ToString().substr(0,6).c_str());
// Tally transaction fees
int64 nTxFee = nValueIn - GetValueOut();
if (nTxFee < 0)
@@ -1180,7 +1208,7 @@ bool Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
foreach(CBlockIndex* pindex, vDisconnect)
{
CBlock block;
if (!block.ReadFromDisk(pindex->nFile, pindex->nBlockPos))
if (!block.ReadFromDisk(pindex))
return error("Reorganize() : ReadFromDisk for disconnect failed");
if (!block.DisconnectBlock(txdb, pindex))
return error("Reorganize() : DisconnectBlock failed");
@@ -1197,7 +1225,7 @@ bool Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
{
CBlockIndex* pindex = vConnect[i];
CBlock block;
if (!block.ReadFromDisk(pindex->nFile, pindex->nBlockPos))
if (!block.ReadFromDisk(pindex))
return error("Reorganize() : ReadFromDisk for connect failed");
if (!block.ConnectBlock(txdb, pindex))
{
@@ -1283,7 +1311,7 @@ bool CBlock::SetBestChain(CTxDB& txdb, CBlockIndex* pindexNew)
bnBestChainWork = pindexNew->bnChainWork;
nTimeBestReceived = GetTime();
nTransactionsUpdated++;
printf("SetBestChain: new best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,22).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
printf("SetBestChain: new best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,20).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
return true;
}
@@ -1294,7 +1322,7 @@ bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
// Check for duplicate
uint256 hash = GetHash();
if (mapBlockIndex.count(hash))
return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,16).c_str());
return error("AddToBlockIndex() : %s already exists", hash.ToString().substr(0,20).c_str());
// Construct new block index object
CBlockIndex* pindexNew = new CBlockIndex(nFile, nBlockPos, *this);
@@ -1346,7 +1374,7 @@ bool CBlock::CheckBlock() const
return error("CheckBlock() : size limits failed");
// Check timestamp
if (nTime > GetAdjustedTime() + 2 * 60 * 60)
if (GetBlockTime() > GetAdjustedTime() + 2 * 60 * 60)
return error("CheckBlock() : block timestamp too far in the future");
// First transaction must be coinbase, the rest must not be
@@ -1362,10 +1390,8 @@ bool CBlock::CheckBlock() const
return error("CheckBlock() : CheckTransaction failed");
// Check proof of work matches claimed amount
if (CBigNum().SetCompact(nBits) > bnProofOfWorkLimit)
return error("CheckBlock() : nBits below minimum work");
if (GetHash() > CBigNum().SetCompact(nBits).getuint256())
return error("CheckBlock() : hash doesn't match nBits");
if (!CheckProofOfWork(GetHash(), nBits))
return error("CheckBlock() : proof of work failed");
// Check merkleroot
if (hashMerkleRoot != BuildMerkleTree())
@@ -1388,12 +1414,12 @@ bool CBlock::AcceptBlock()
CBlockIndex* pindexPrev = (*mi).second;
// Check timestamp against prev
if (nTime <= pindexPrev->GetMedianTimePast())
if (GetBlockTime() <= pindexPrev->GetMedianTimePast())
return error("AcceptBlock() : block's timestamp is too early");
// Check that all transactions are finalized
foreach(const CTransaction& tx, vtx)
if (!tx.IsFinal(pindexPrev->nHeight+1, nTime))
if (!tx.IsFinal(pindexPrev->nHeight+1, GetBlockTime()))
return error("AcceptBlock() : contains a non-final transaction");
// Check proof of work
@@ -1442,9 +1468,9 @@ bool ProcessBlock(CNode* pfrom, CBlock* pblock)
// Check for duplicate
uint256 hash = pblock->GetHash();
if (mapBlockIndex.count(hash))
return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,16).c_str());
return error("ProcessBlock() : already have block %d %s", mapBlockIndex[hash]->nHeight, hash.ToString().substr(0,20).c_str());
if (mapOrphanBlocks.count(hash))
return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,16).c_str());
return error("ProcessBlock() : already have block (orphan) %s", hash.ToString().substr(0,20).c_str());
// Preliminary checks
if (!pblock->CheckBlock())
@@ -1456,7 +1482,7 @@ bool ProcessBlock(CNode* pfrom, CBlock* pblock)
// If don't already have its previous block, shunt it off to holding area until we get it
if (!mapBlockIndex.count(pblock->hashPrevBlock))
{
printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,16).c_str());
printf("ProcessBlock: ORPHAN BLOCK, prev=%s\n", pblock->hashPrevBlock.ToString().substr(0,20).c_str());
mapOrphanBlocks.insert(make_pair(hash, pblock));
mapOrphanBlocksByPrev.insert(make_pair(pblock->hashPrevBlock, pblock));
@@ -1731,8 +1757,8 @@ void PrintBlockTree()
pindex->nHeight,
pindex->nFile,
pindex->nBlockPos,
block.GetHash().ToString().substr(0,16).c_str(),
DateTimeStrFormat("%x %H:%M:%S", block.nTime).c_str(),
block.GetHash().ToString().substr(0,20).c_str(),
DateTimeStrFormat("%x %H:%M:%S", block.GetBlockTime()).c_str(),
block.vtx.size());
CRITICAL_BLOCK(cs_mapWallet)
@@ -2157,12 +2183,12 @@ bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
if (pindex)
pindex = pindex->pnext;
int nLimit = 500 + locator.GetDistanceBack();
printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,16).c_str(), nLimit);
printf("getblocks %d to %s limit %d\n", (pindex ? pindex->nHeight : -1), hashStop.ToString().substr(0,20).c_str(), nLimit);
for (; pindex; pindex = pindex->pnext)
{
if (pindex->GetBlockHash() == hashStop)
{
printf(" getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,16).c_str());
printf(" getblocks stopping at %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str());
break;
}
pfrom->PushInventory(CInv(MSG_BLOCK, pindex->GetBlockHash()));
@@ -2170,7 +2196,7 @@ bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
{
// When this block is requested, we'll send an inv that'll make them
// getblocks the next batch of inventory.
printf(" getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,16).c_str());
printf(" getblocks stopping at limit %d %s\n", pindex->nHeight, pindex->GetBlockHash().ToString().substr(0,20).c_str());
pfrom->hashContinue = pindex->GetBlockHash();
break;
}
@@ -2237,7 +2263,7 @@ bool ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
vRecv >> *pblock;
//// debug print
printf("received block %s\n", pblock->GetHash().ToString().substr(0,16).c_str());
printf("received block %s\n", pblock->GetHash().ToString().substr(0,20).c_str());
// pblock->print();
CInv inv(MSG_BLOCK, pblock->GetHash());