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Consensus: Separate CheckIndexAgainstCheckpoint() from ContextualCheckBlockHeader

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This commit is contained in:
Jorge Timón 2015-03-30 13:48:04 +02:00
parent ac5476e2c1
commit 425c3a87ff
1 changed files with 19 additions and 16 deletions
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35
src/main.cpp
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@ -2719,18 +2719,23 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo
return true; return true;
} }
bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex * const pindexPrev) static bool CheckIndexAgainstCheckpoint(const CBlockIndex* pindexPrev, CValidationState& state, const CChainParams& chainparams, const uint256& hash)
{ {
const CChainParams& chainParams = Params(); if (*pindexPrev->phashBlock == chainparams.GetConsensus().hashGenesisBlock)
const Consensus::Params& consensusParams = chainParams.GetConsensus();
uint256 hash = block.GetHash();
if (hash == consensusParams.hashGenesisBlock)
return true; return true;
assert(pindexPrev);
int nHeight = pindexPrev->nHeight+1; int nHeight = pindexPrev->nHeight+1;
// Don't accept any forks from the main chain prior to last checkpoint
CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(chainparams.Checkpoints());
if (pcheckpoint && nHeight < pcheckpoint->nHeight)
return state.DoS(100, error("%s: forked chain older than last checkpoint (height %d)", __func__, nHeight));
return true;
}
bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex * const pindexPrev)
{
const Consensus::Params& consensusParams = Params().GetConsensus();
// Check proof of work // Check proof of work
if (block.nBits != GetNextWorkRequired(pindexPrev, &block, consensusParams)) if (block.nBits != GetNextWorkRequired(pindexPrev, &block, consensusParams))
return state.DoS(100, error("%s: incorrect proof of work", __func__), return state.DoS(100, error("%s: incorrect proof of work", __func__),
@ -2741,14 +2746,6 @@ bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& sta
return state.Invalid(error("%s: block's timestamp is too early", __func__), return state.Invalid(error("%s: block's timestamp is too early", __func__),
REJECT_INVALID, "time-too-old"); REJECT_INVALID, "time-too-old");
if (fCheckpointsEnabled)
{
// Don't accept any forks from the main chain prior to last checkpoint
CBlockIndex* pcheckpoint = Checkpoints::GetLastCheckpoint(chainParams.Checkpoints());
if (pcheckpoint && nHeight < pcheckpoint->nHeight)
return state.DoS(100, error("%s: forked chain older than last checkpoint (height %d)", __func__, nHeight));
}
// Reject block.nVersion=1 blocks when 95% (75% on testnet) of the network has upgraded: // Reject block.nVersion=1 blocks when 95% (75% on testnet) of the network has upgraded:
if (block.nVersion < 2 && IsSuperMajority(2, pindexPrev, consensusParams.nMajorityRejectBlockOutdated, consensusParams)) if (block.nVersion < 2 && IsSuperMajority(2, pindexPrev, consensusParams.nMajorityRejectBlockOutdated, consensusParams))
return state.Invalid(error("%s: rejected nVersion=1 block", __func__), return state.Invalid(error("%s: rejected nVersion=1 block", __func__),
@ -2818,6 +2815,9 @@ bool AcceptBlockHeader(const CBlockHeader& block, CValidationState& state, CBloc
if (pindexPrev->nStatus & BLOCK_FAILED_MASK) if (pindexPrev->nStatus & BLOCK_FAILED_MASK)
return state.DoS(100, error("%s: prev block invalid", __func__), REJECT_INVALID, "bad-prevblk"); return state.DoS(100, error("%s: prev block invalid", __func__), REJECT_INVALID, "bad-prevblk");
} }
assert(pindexPrev);
if (fCheckpointsEnabled && !CheckIndexAgainstCheckpoint(pindexPrev, state, chainparams, hash))
return error("%s: CheckIndexAgainstCheckpoint(): %s", __func__, state.GetRejectReason().c_str());
if (!ContextualCheckBlockHeader(block, state, pindexPrev)) if (!ContextualCheckBlockHeader(block, state, pindexPrev))
return false; return false;
@ -2933,8 +2933,11 @@ bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, bool
bool TestBlockValidity(CValidationState &state, const CBlock& block, CBlockIndex * const pindexPrev, bool fCheckPOW, bool fCheckMerkleRoot) bool TestBlockValidity(CValidationState &state, const CBlock& block, CBlockIndex * const pindexPrev, bool fCheckPOW, bool fCheckMerkleRoot)
{ {
const CChainParams& chainparams = Params();
AssertLockHeld(cs_main); AssertLockHeld(cs_main);
assert(pindexPrev == chainActive.Tip()); assert(pindexPrev && pindexPrev == chainActive.Tip());
if (fCheckpointsEnabled && !CheckIndexAgainstCheckpoint(pindexPrev, state, chainparams, block.GetHash()))
return error("%s: CheckIndexAgainstCheckpoint(): %s", __func__, state.GetRejectReason().c_str());
CCoinsViewCache viewNew(pcoinsTip); CCoinsViewCache viewNew(pcoinsTip);
CBlockIndex indexDummy(block); CBlockIndex indexDummy(block);