Method getBlockHash

src/node/interfaces.cpp:468–475

        return std::nullopt;
    }
    uint256 getBlockHash(int height) override
    {
        LOCK(::cs_main);
        const CChain& active = Assert(m_node.chainman)->ActiveChain();
        CBlockIndex* block = active[height];
        assert(block);
        return block->GetBlockHash();
    }
    bool haveBlockOnDisk(int height) override
    {
        LOCK(cs_main);