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new safety feature displays a warning message and locks down RPC if it detects a problem that may require an upgrade

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-- version 0.3.8

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@122 1a98c847-1fd6-4fd8-948a-caf3550aa51b
This commit is contained in:
s_nakamoto
2010-08-03 18:25:05 +00:00
parent 6ff5f718b6
commit 2c06be915d
8 changed files with 81 additions and 34 deletions
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60
main.cpp
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@@ -25,6 +25,7 @@ const uint256 hashGenesisBlock("0x000000000019d6689c085ae165831e934ff763ae46a2a6
CBlockIndex* pindexGenesisBlock = NULL;
int nBestHeight = -1;
CBigNum bnBestChainWork = 0;
CBigNum bnBestInvalidWork = 0;
uint256 hashBestChain = 0;
CBlockIndex* pindexBest = NULL;
int64 nTimeBestReceived = 0;
@@ -794,12 +795,12 @@ uint256 GetOrphanRoot(const CBlock* pblock)
return pblock->GetHash();
}
int64 CBlock::GetBlockValue(int64 nFees) const
int64 CBlock::GetBlockValue(int nHeight, int64 nFees) const
{
int64 nSubsidy = 50 * COIN;
// Subsidy is cut in half every 4 years
nSubsidy >>= (nBestHeight / 210000);
nSubsidy >>= (nHeight / 210000);
return nSubsidy + nFees;
}
@@ -865,6 +866,28 @@ bool IsInitialBlockDownload()
pindexBest->nTime < GetTime() - 24 * 60 * 60);
}
bool IsLockdown()
{
if (!pindexBest)
return false;
return (bnBestInvalidWork > bnBestChainWork + pindexBest->GetBlockWork() * 6);
}
void Lockdown(CBlockIndex* pindexNew)
{
if (pindexNew->bnChainWork > bnBestInvalidWork)
{
bnBestInvalidWork = pindexNew->bnChainWork;
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: IsLockdown()=%d\n", (IsLockdown() ? 1 : 0));
if (IsLockdown())
printf("Lockdown: WARNING: Displayed transactions may not be correct! You may need to upgrade.\n");
}
@@ -1086,7 +1109,7 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
return false;
}
if (vtx[0].GetValueOut() > GetBlockValue(nFees))
if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
return false;
// Update block index on disk without changing it in memory.
@@ -1116,11 +1139,13 @@ bool Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
CBlockIndex* plonger = pindexNew;
while (pfork != plonger)
{
if (!(pfork = pfork->pprev))
return error("Reorganize() : pfork->pprev is null");
while (plonger->nHeight > pfork->nHeight)
if (!(plonger = plonger->pprev))
return error("Reorganize() : plonger->pprev is null");
if (pfork == plonger)
break;
if (!(pfork = pfork->pprev))
return error("Reorganize() : pfork->pprev is null");
}
// List of what to disconnect
@@ -1160,16 +1185,8 @@ bool Reorganize(CTxDB& txdb, CBlockIndex* pindexNew)
return error("Reorganize() : ReadFromDisk for connect failed");
if (!block.ConnectBlock(txdb, pindex))
{
// Invalid block, delete the rest of this branch
// Invalid block
txdb.TxnAbort();
for (int j = i; j < vConnect.size(); j++)
{
CBlockIndex* pindex = vConnect[j];
pindex->EraseBlockFromDisk();
txdb.EraseBlockIndex(pindex->GetBlockHash());
mapBlockIndex.erase(pindex->GetBlockHash());
delete pindex;
}
return error("Reorganize() : ConnectBlock failed");
}
@@ -1227,12 +1244,12 @@ bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
pindexNew->bnChainWork = (pindexNew->pprev ? pindexNew->pprev->bnChainWork : 0) + pindexNew->GetBlockWork();
CTxDB txdb;
txdb.TxnBegin();
txdb.WriteBlockIndex(CDiskBlockIndex(pindexNew));
// New best
if (pindexNew->bnChainWork > bnBestChainWork)
{
txdb.TxnBegin();
if (pindexGenesisBlock == NULL && hash == hashGenesisBlock)
{
pindexGenesisBlock = pindexNew;
@@ -1244,9 +1261,7 @@ bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
if (!ConnectBlock(txdb, pindexNew) || !txdb.WriteHashBestChain(hash))
{
txdb.TxnAbort();
pindexNew->EraseBlockFromDisk();
mapBlockIndex.erase(pindexNew->GetBlockHash());
delete pindexNew;
Lockdown(pindexNew);
return error("AddToBlockIndex() : ConnectBlock failed");
}
txdb.TxnCommit();
@@ -1262,9 +1277,11 @@ bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
if (!Reorganize(txdb, pindexNew))
{
txdb.TxnAbort();
Lockdown(pindexNew);
return error("AddToBlockIndex() : Reorganize failed");
}
}
txdb.TxnCommit();
// New best block
hashBestChain = hash;
@@ -1273,10 +1290,9 @@ bool CBlock::AddToBlockIndex(unsigned int nFile, unsigned int nBlockPos)
bnBestChainWork = pindexNew->bnChainWork;
nTimeBestReceived = GetTime();
nTransactionsUpdated++;
printf("AddToBlockIndex: new best=%s height=%d\n", hashBestChain.ToString().substr(0,16).c_str(), nBestHeight);
printf("AddToBlockIndex: new best=%s height=%d work=%s\n", hashBestChain.ToString().substr(0,22).c_str(), nBestHeight, bnBestChainWork.ToString().c_str());
}
txdb.TxnCommit();
txdb.Close();
if (pindexNew == pindexBest)
@@ -1352,7 +1368,7 @@ bool CBlock::AcceptBlock()
// Check that all transactions are finalized
foreach(const CTransaction& tx, vtx)
if (!tx.IsFinal(nTime))
if (!tx.IsFinal(pindexPrev->nHeight+1, nTime))
return error("AcceptBlock() : contains a non-final transaction");
// Check proof of work
@@ -2648,7 +2664,7 @@ void BitcoinMiner()
}
}
pblock->nBits = nBits;
pblock->vtx[0].vout[0].nValue = pblock->GetBlockValue(nFees);
pblock->vtx[0].vout[0].nValue = pblock->GetBlockValue(pindexPrev->nHeight+1, nFees);
printf("Running BitcoinMiner with %d transactions in block\n", pblock->vtx.size());