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Validate RandomX proof of work when reading blocks

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This commit is contained in:
Capri 2026-09-15 22:06:59 +00:00
commit e9e4cad8e8
Signed by: VextaProject
SSH key fingerprint: SHA256:739BZv8LvIDY2tR7lXLy/IQ6MaGTQtYcG9GNvCjmpVM
3 changed files with 35 additions and 11 deletions
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29
src/node/blockstorage.cpp
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@ -379,9 +379,16 @@ bool ReadBlockFromDisk(CBlock& block, const FlatFilePos& pos, const Consensus::P
return error("%s: Deserialize or I/O error - %s at %s", __func__, e.what(), pos.ToString());
}
// Check the header
if (!CheckProofOfWork(block.GetHash(), block.nBits, consensusParams)) {
return error("ReadBlockFromDisk: Errors in block header at %s", pos.ToString());
// Check context-free proof of work. RandomX requires the previous block
// index to resolve its deterministic seed and is therefore checked by
// the CBlockIndex overload below.
if (block.GetHash() == consensusParams.hashGenesisBlock ||
block.GetAlgo() == ALGO_SHA256D) {
if (!CheckProofOfWork(block.GetHash(), block.nBits, consensusParams)) {
return error("ReadBlockFromDisk: Errors in block header at %s", pos.ToString());
}
} else if (block.GetAlgo() != ALGO_RANDOMX) {
return error("ReadBlockFromDisk: Unknown proof-of-work algorithm at %s", pos.ToString());
}
// Signet only: check block solution
@ -403,6 +410,22 @@ bool ReadBlockFromDisk(CBlock& block, const CBlockIndex* pindex, const Consensus
return error("ReadBlockFromDisk(CBlock&, CBlockIndex*): GetHash() doesn't match index for %s at %s",
pindex->ToString(), block_pos.ToString());
}
if (block.GetHash() != consensusParams.hashGenesisBlock &&
block.GetAlgo() == ALGO_RANDOMX) {
if (pindex->pprev == nullptr) {
return error("ReadBlockFromDisk(CBlock&, CBlockIndex*): RandomX block has no previous block index for %s at %s",
pindex->ToString(), block_pos.ToString());
}
BlockValidationState state;
if (!CheckContextualRandomXProofOfWork(
block, state, consensusParams, pindex->pprev, true)) {
return error("ReadBlockFromDisk(CBlock&, CBlockIndex*): RandomX proof of work failed for %s at %s: %s",
pindex->ToString(), block_pos.ToString(), state.ToString());
}
}
return true;
}