Function SerializeHDKeypaths

src/script/sign.h:189–201

// Serialize HD keypaths to a stream from a map
template<typename Stream>
void SerializeHDKeypaths(Stream& s, const std::map<CPubKey, std::vector<uint32_t>>& hd_keypaths, uint8_t type)
{
    for (auto keypath_pair : hd_keypaths) {
        if (!keypath_pair.first.IsValid()) {
            throw std::ios_base::failure("Invalid CPubKey being serialized");
        }
        SerializeToVector(s, type, MakeSpan(keypath_pair.first));
        WriteCompactSize(s, keypath_pair.second.size() * sizeof(uint32_t));
        for (auto& path : keypath_pair.second) {
            s << path;
        }
    }
}

/** A structure for PSBTs which contain per-input information */
struct PSBTInput