@achow101 noted we don't reject them therefore they must be silently accepted. This is not part of the specs, we should remove them. Also cc @sipa.

I can take care of this.
{
    std::vector<int> m_depths;
protected:
    std::vector<CScript> MakeScripts(const std::vector<CPubKey>& keys, Span<const CScript> scripts, FlatSigningProvider& out) const override
    {
        TaprootBuilder builder;
        assert(m_depths.size() == scripts.size());
        for (size_t pos = 0; pos < m_depths.size(); ++pos) {
            builder.Add(m_depths[pos], scripts[pos], TAPROOT_LEAF_TAPSCRIPT);
        }
        if (!builder.IsComplete()) return {};
        assert(keys.size() == 1);
        XOnlyPubKey xpk(keys[0]);
        if (!xpk.IsFullyValid()) return {};
        builder.Finalize(xpk);
        WitnessV1Taproot output = builder.GetOutput();
        out.tr_trees[output] = builder;
        out.pubkeys.emplace(keys[0].GetID(), keys[0]);
        return Vector(GetScriptForDestination(output));
    }
    bool ToStringSubScriptHelper(const SigningProvider* arg, std::string& ret, const StringType type, const DescriptorCache* cache = nullptr) const override