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Use block height 0 when checking for genesis block

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There is no previous block when validating the genesis block as part of contextual checks,
so block height cannot be used. Consensus parameters are now taken from height 0 for
the genesis check, and from block height only if the it's not the genesis block.
This commit is contained in:
Ross Nicoll 2015-07-26 12:22:04 +00:00
parent 8cd835cddb
commit d97a37f4a9
1 changed files with 2 additions and 2 deletions
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4
src/main.cpp
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@ -2747,14 +2747,14 @@ bool CheckBlock(const CBlock& block, CValidationState& state, bool fCheckPOW, bo
bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& state, CBlockIndex * const pindexPrev)
{
const CChainParams& chainParams = Params();
const Consensus::Params& consensusParams = chainParams.GetConsensus(pindexPrev->nHeight + 1);
uint256 hash = block.GetHash();
if (hash == consensusParams.hashGenesisBlock)
if (hash == chainParams.GetConsensus(0).hashGenesisBlock)
return true;
assert(pindexPrev);
int nHeight = pindexPrev->nHeight+1;
const Consensus::Params& consensusParams = chainParams.GetConsensus(nHeight);
// Disallow legacy blocks after merge-mining start.
if (!consensusParams.fAllowLegacyBlocks