Function Grind

src/bitcoin-util.cpp:115–152

}

static int Grind(const std::vector<std::string>& args, std::string& strPrint)
{
    if (args.size() != 1) {
        strPrint = "Must specify block header to grind";
        return EXIT_FAILURE;
    }

    CBlockHeader header;
    if (!DecodeHexBlockHeader(header, args[0])) {
        strPrint = "Could not decode block header";
        return EXIT_FAILURE;
    }

    uint32_t nBits = header.nBits;
    std::atomic<bool> found{false};
    uint32_t proposed_nonce{};

    std::vector<std::thread> threads;
    int n_tasks = std::max(1u, std::thread::hardware_concurrency());
    threads.reserve(n_tasks);
    for (int i = 0; i < n_tasks; ++i) {
        threads.emplace_back(grind_task, nBits, header, i, n_tasks, std::ref(found), std::ref(proposed_nonce));
    }
    for (auto& t : threads) {
        t.join();
    }
    if (found) {
        header.nNonce = proposed_nonce;
    } else {
        strPrint = "Could not satisfy difficulty target";
        return EXIT_FAILURE;
    }

    DataStream ss{};
    ss << header;
    strPrint = HexStr(ss);
    return EXIT_SUCCESS;
}

static int NetMagic(const std::vector<std::string>& args, std::string& strPrint)
{