Function GetPackageHash

src/policy/packages.cpp:151–170

}

uint256 GetPackageHash(const std::vector<CTransactionRef>& transactions)
{
    // Create a vector of the wtxids.
    std::vector<Wtxid> wtxids_copy;
    std::transform(transactions.cbegin(), transactions.cend(), std::back_inserter(wtxids_copy),
        [](const auto& tx){ return tx->GetWitnessHash(); });

    // Sort in ascending order
    std::sort(wtxids_copy.begin(), wtxids_copy.end(), [](const auto& lhs, const auto& rhs) {
        return std::lexicographical_compare(std::make_reverse_iterator(lhs.end()), std::make_reverse_iterator(lhs.begin()),
                                            std::make_reverse_iterator(rhs.end()), std::make_reverse_iterator(rhs.begin()));
    });

    // Get sha256 hash of the wtxids concatenated in this order
    HashWriter hashwriter;
    for (const auto& wtxid : wtxids_copy) {
        hashwriter << wtxid;
    }
    return hashwriter.GetSHA256();
}