bool get_block_hashing_blob(const Block& b, BinaryArray& ba) {
if (!toBinaryArray(static_cast<const BlockHeader&>(b), ba)) {
return false;
}
Hash treeRootHash = get_tx_tree_hash(b);
ba.insert(ba.end(), treeRootHash.data, treeRootHash.data + 32);
auto transactionCount = asBinaryArray(Tools::get_varint_data(b.transactionHashes.size() + 1));
ba.insert(ba.end(), transactionCount.begin(), transactionCount.end());
return true;
}
const Crypto::Hash& CachedBlock::getBlockHash() const {
if (!blockHash.is_initialized()) {
BinaryArray blockBinaryArray = getBlockHashingBinaryArray();
if (BLOCK_MAJOR_VERSION_2 <= block.majorVersion) {
const auto& parentBlock = getParentBlockHashingBinaryArray(false);
blockBinaryArray.insert(blockBinaryArray.end(), parentBlock.begin(), parentBlock.end());
}
blockHash = getObjectHash(blockBinaryArray);
}
return blockHash.get();
}
bool get_block_hash(const Block& b, Hash& res) {
BinaryArray ba;
if (!get_block_hashing_blob(b, ba)) {
return false;
}
// The header of block version 1 differs from headers of blocks starting from v.2
if (BLOCK_MAJOR_VERSION_2 == b.majorVersion || BLOCK_MAJOR_VERSION_3 == b.majorVersion) {
BinaryArray parent_blob;
auto serializer = makeParentBlockSerializer(b, true, false);
if (!toBinaryArray(serializer, parent_blob))
return false;
ba.insert(ba.end(), parent_blob.begin(), parent_blob.end());
}
return getObjectHash(ba, res);
}