code data_base::verify_insert(const block& block, size_t height)
{
if (block.transactions().empty())
return error::empty_block;
if (blocks_->exists(height))
return error::store_block_duplicate;
return error::success;
}
code data_base::verify_push(const block& block, size_t height)
{
if (block.transactions().empty())
return error::empty_block;
if (get_next_height(blocks()) != height)
return error::store_block_invalid_height;
if (block.header().previous_block_hash() !=
get_previous_hash(blocks(), height))
return error::store_block_missing_parent;
return error::success;
}