Method ToPrivateString

src/script/descriptor.cpp:214–220

    bool IsRange() const override { return m_provider->IsRange(); }
    std::string ToString() const override { return m_fn_name + "(" + m_provider->ToString() + ")"; }
    bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
    {
        std::string ret;
        if (!m_provider->ToPrivateString(arg, ret)) return false;
        out = m_fn_name + "(" + std::move(ret) + ")";
        return true;
    }
    bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
    {
        CPubKey key;