aboutsummaryrefslogtreecommitdiff
path: root/src/bitcoin-util.cpp
blob: b702a68bdf4a4b432ac7b0549aab512d52514fa4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
// Copyright (c) 2009-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#if defined(HAVE_CONFIG_H)
#include <config/bitcoin-config.h>
#endif

#include <arith_uint256.h>
#include <clientversion.h>
#include <coins.h>
#include <consensus/consensus.h>
#include <core_io.h>
#include <key_io.h>
#include <policy/rbf.h>
#include <primitives/transaction.h>
#include <script/script.h>
#include <script/sign.h>
#include <script/signingprovider.h>
#include <univalue.h>
#include <util/moneystr.h>
#include <util/rbf.h>
#include <util/strencodings.h>
#include <util/string.h>
#include <util/system.h>
#include <util/translation.h>

#include <functional>
#include <memory>
#include <stdio.h>
#include <thread>

#include <boost/algorithm/string.hpp>

static const int CONTINUE_EXECUTION=-1;

const std::function<std::string(const char*)> G_TRANSLATION_FUN = nullptr;

static void SetupBitcoinUtilArgs(ArgsManager &argsman)
{
    SetupHelpOptions(argsman);

    argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);

    SetupChainParamsBaseOptions(argsman);
}

// This function returns either one of EXIT_ codes when it's expected to stop the process or
// CONTINUE_EXECUTION when it's expected to continue further.
static int AppInitUtil(int argc, char* argv[])
{
    SetupBitcoinUtilArgs(gArgs);
    std::string error;
    if (!gArgs.ParseParameters(argc, argv, error)) {
        tfm::format(std::cerr, "Error parsing command line arguments: %s\n", error);
        return EXIT_FAILURE;
    }

    // Check for chain settings (Params() calls are only valid after this clause)
    try {
        SelectParams(gArgs.GetChainName());
    } catch (const std::exception& e) {
        tfm::format(std::cerr, "Error: %s\n", e.what());
        return EXIT_FAILURE;
    }

    if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
        // First part of help message is specific to this utility
        std::string strUsage = PACKAGE_NAME " bitcoin-util utility version " + FormatFullVersion() + "\n";
        if (!gArgs.IsArgSet("-version")) {
            strUsage += "\n"
                "Usage:  bitcoin-util [options] [commands]  Do stuff\n";
            strUsage += "\n" + gArgs.GetHelpMessage();
        }

        tfm::format(std::cout, "%s", strUsage);

        if (argc < 2) {
            tfm::format(std::cerr, "Error: too few parameters\n");
            return EXIT_FAILURE;
        }
        return EXIT_SUCCESS;
    }
    return CONTINUE_EXECUTION;
}

static void grind_task(uint32_t nBits, CBlockHeader& header_orig, uint32_t offset, uint32_t step, std::atomic<bool>& found)
{
    arith_uint256 target;
    bool neg, over;
    target.SetCompact(nBits, &neg, &over);
    if (target == 0 || neg || over) return;
    CBlockHeader header = header_orig; // working copy
    header.nNonce = offset;

    uint32_t finish = std::numeric_limits<uint32_t>::max() - step;
    finish = finish - (finish % step) + offset;

    while (!found && header.nNonce < finish) {
        const uint32_t next = (finish - header.nNonce < 5000*step) ? finish : header.nNonce + 5000*step;
        do {
            if (UintToArith256(header.GetHash()) <= target) {
                if (!found.exchange(true)) {
                    header_orig.nNonce = header.nNonce;
                }
                return;
            }
            header.nNonce += step;
        } while(header.nNonce != next);
    }
}

static int Grind(int argc, char* argv[], std::string& strPrint)
{
    if (argc != 1) {
        strPrint = "Must specify block header to grind";
        return 1;
    }

    CBlockHeader header;
    if (!DecodeHexBlockHeader(header, argv[0])) {
        strPrint = "Could not decode block header";
        return 1;
    }

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

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

    CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
    ss << header;
    strPrint = HexStr(ss);
    return 0;
}

static int CommandLineUtil(int argc, char* argv[])
{
    if (argc <= 1) return 1;

    std::string strPrint;
    int nRet = 0;

    try {
        while (argc > 1 && IsSwitchChar(argv[1][0]) && (argv[1][1] != 0)) {
            --argc;
            ++argv;
        }

        char* command = argv[1];
        if (strcmp(command, "grind") == 0) {
            nRet = Grind(argc-2, argv+2, strPrint);
        } else {
            strPrint = strprintf("Unknown command %s", command);
            nRet = 1;
        }
    }
    catch (const std::exception& e) {
        strPrint = std::string("error: ") + e.what();
        nRet = EXIT_FAILURE;
    }
    catch (...) {
        PrintExceptionContinue(nullptr, "CommandLineUtil()");
        throw;
    }

    if (strPrint != "") {
        tfm::format(nRet == 0 ? std::cout : std::cerr, "%s\n", strPrint);
    }
    return nRet;
}

int main(int argc, char* argv[])
{
    SetupEnvironment();

    try {
        int ret = AppInitUtil(argc, argv);
        if (ret != CONTINUE_EXECUTION)
            return ret;
    }
    catch (const std::exception& e) {
        PrintExceptionContinue(&e, "AppInitUtil()");
        return EXIT_FAILURE;
    } catch (...) {
        PrintExceptionContinue(nullptr, "AppInitUtil()");
        return EXIT_FAILURE;
    }

    int ret = EXIT_FAILURE;
    try {
        ret = CommandLineUtil(argc, argv);
    }
    catch (const std::exception& e) {
        PrintExceptionContinue(&e, "CommandLineUtil()");
    } catch (...) {
        PrintExceptionContinue(nullptr, "CommandLineUtil()");
    }
    return ret;
}