Method findAncestorByHeight

src/node/interfaces.cpp:611–621

        return FillBlock(active.FindEarliestAtLeast(min_time, min_height), block, lock, active, chainman().m_blockman);
    }
    bool findAncestorByHeight(const uint256& block_hash, int ancestor_height, const FoundBlock& ancestor_out) override
    {
        WAIT_LOCK(cs_main, lock);
        const CChain& active = chainman().ActiveChain();
        if (const CBlockIndex* block = chainman().m_blockman.LookupBlockIndex(block_hash)) {
            if (const CBlockIndex* ancestor = block->GetAncestor(ancestor_height)) {
                return FillBlock(ancestor, ancestor_out, lock, active, chainman().m_blockman);
            }
        }
        return FillBlock(nullptr, ancestor_out, lock, active, chainman().m_blockman);
    }
    bool findAncestorByHash(const uint256& block_hash, const uint256& ancestor_hash, const FoundBlock& ancestor_out) override
    {
        WAIT_LOCK(cs_main, lock);