bitcoin-cli.cpp

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2016 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 <chainparamsbase.h>
#include <clientversion.h>
#include <rpc/client.h>
#include <rpc/protocol.h>
#include <rpc/request.h>
#include <support/events.h>
#include <util/strencodings.h>
#include <util/system.h>
#include <util/translation.h>

#include <event2/buffer.h>
#include <event2/keyvalq_struct.h>

#include <compat/stdin.h>
#include <univalue.h>

#include <cstdio>
#include <functional>
#include <memory>
#include <tuple>

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

static const char DEFAULT_RPCCONNECT[] = "127.0.0.1";
static const int DEFAULT_HTTP_CLIENT_TIMEOUT = 900;
static const bool DEFAULT_NAMED = false;
static const int CONTINUE_EXECUTION = -1;

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

    const auto defaultBaseParams =
        CreateBaseChainParams(CBaseChainParams::MAIN);
    const auto testnetBaseParams =
        CreateBaseChainParams(CBaseChainParams::TESTNET);
    const auto regtestBaseParams =
        CreateBaseChainParams(CBaseChainParams::REGTEST);

    argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY,
                   OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-conf=<file>",
        strprintf("Specify configuration file. Relative paths will be "
                  "prefixed by datadir location. (default: %s)",
                  BITCOIN_CONF_FILENAME),
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg("-datadir=<dir>", "Specify data directory",
                   ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-getinfo",
        "Get general information from the remote server. Note that unlike "
        "server-side RPC calls, the results of -getinfo is the result of "
        "multiple non-atomic requests. Some entries in the result may "
        "represent results from different states (e.g. wallet balance may be "
        "as of a different block from the chain state reported)",
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    SetupChainParamsBaseOptions(argsman);
    argsman.AddArg(
        "-named",
        strprintf("Pass named instead of positional arguments (default: %s)",
                  DEFAULT_NAMED),
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-rpcconnect=<ip>",
        strprintf("Send commands to node running on <ip> (default: %s)",
                  DEFAULT_RPCCONNECT),
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-rpccookiefile=<loc>",
        "Location of the auth cookie. Relative paths will be prefixed "
        "by a net-specific datadir location. (default: data dir)",
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg("-rpcport=<port>",
                   strprintf("Connect to JSON-RPC on <port> (default: %u, "
                             "testnet: %u, regtest: %u)",
                             defaultBaseParams->RPCPort(),
                             testnetBaseParams->RPCPort(),
                             regtestBaseParams->RPCPort()),
                   ArgsManager::ALLOW_ANY | ArgsManager::NETWORK_ONLY,
                   OptionsCategory::OPTIONS);
    argsman.AddArg("-rpcwait", "Wait for RPC server to start",
                   ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg("-rpcuser=<user>", "Username for JSON-RPC connections",
                   ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg("-rpcpassword=<pw>", "Password for JSON-RPC connections",
                   ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-rpcclienttimeout=<n>",
        strprintf("Timeout in seconds during HTTP requests, or 0 for "
                  "no timeout. (default: %d)",
                  DEFAULT_HTTP_CLIENT_TIMEOUT),
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);

    argsman.AddArg("-stdinrpcpass",
                   "Read RPC password from standard input as a single "
                   "line. When combined with -stdin, the first line "
                   "from standard input is used for the RPC password. When "
                   "combined with -stdinwalletpassphrase, -stdinrpcpass "
                   "consumes the first line, and -stdinwalletpassphrase "
                   "consumes the second.",
                   ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg("-stdinwalletpassphrase",
                   "Read wallet passphrase from standard input as a single "
                   "line. When combined with -stdin, the first line "
                   "from standard input is used for the wallet passphrase.",
                   ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-stdin",
        "Read extra arguments from standard input, one per line until "
        "EOF/Ctrl-D (recommended for sensitive information such as "
        "passphrases). When combined with -stdinrpcpass, the first "
        "line from standard input is used for the RPC password.",
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
    argsman.AddArg(
        "-rpcwallet=<walletname>",
        "Send RPC for non-default wallet on RPC server (needs to exactly match "
        "corresponding -wallet option passed to bitcoind). This changes the "
        "RPC endpoint used, e.g. http://127.0.0.1:8332/wallet/<walletname>",
        ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
}

static void libevent_log_cb(int severity, const char *msg) {
#ifndef EVENT_LOG_ERR
// EVENT_LOG_ERR was added in 2.0.19; but before then _EVENT_LOG_ERR existed.
#define EVENT_LOG_ERR _EVENT_LOG_ERR
#endif
    // Ignore everything other than errors
    if (severity >= EVENT_LOG_ERR) {
        throw std::runtime_error(strprintf("libevent error: %s", msg));
    }
}

//
// Start
//

//
// Exception thrown on connection error.  This error is used to determine when
// to wait if -rpcwait is given.
//
class CConnectionFailed : public std::runtime_error {
public:
    explicit inline CConnectionFailed(const std::string &msg)
        : std::runtime_error(msg) {}
};

//
// 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 AppInitRPC(int argc, char *argv[]) {
    //
    // Parameters
    //
    SetupCliArgs(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;
    }
    if (argc < 2 || HelpRequested(gArgs) || gArgs.IsArgSet("-version")) {
        std::string strUsage =
            PACKAGE_NAME " RPC client version " + FormatFullVersion() + "\n";
        if (!gArgs.IsArgSet("-version")) {
            strUsage += "\n"
                        "Usage:  bitcoin-cli [options] <command> [params]  "
                        "Send command to " PACKAGE_NAME "\n"
                        "or:     bitcoin-cli [options] -named <command> "
                        "[name=value]...  Send command to " PACKAGE_NAME
                        " (with named arguments)\n"
                        "or:     bitcoin-cli [options] help                "
                        "List commands\n"
                        "or:     bitcoin-cli [options] help <command>      Get "
                        "help for a command\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;
    }
    if (!CheckDataDirOption()) {
        tfm::format(std::cerr,
                    "Error: Specified data directory \"%s\" does not exist.\n",
                    gArgs.GetArg("-datadir", ""));
        return EXIT_FAILURE;
    }
    if (!gArgs.ReadConfigFiles(error, true)) {
        tfm::format(std::cerr, "Error reading configuration file: %s\n", error);
        return EXIT_FAILURE;
    }
    // Check for -chain, -testnet or -regtest parameter (BaseParams() calls are
    // only valid after this clause)
    try {
        SelectBaseParams(gArgs.GetChainName());
    } catch (const std::exception &e) {
        tfm::format(std::cerr, "Error: %s\n", e.what());
        return EXIT_FAILURE;
    }
    return CONTINUE_EXECUTION;
}

struct HTTPReply {
    HTTPReply() : status(0), error(-1) {}

    int status;
    int error;
    std::string body;
};

static const char *http_errorstring(int code) {
    switch (code) {
#if LIBEVENT_VERSION_NUMBER >= 0x02010300
        case EVREQ_HTTP_TIMEOUT:
            return "timeout reached";
        case EVREQ_HTTP_EOF:
            return "EOF reached";
        case EVREQ_HTTP_INVALID_HEADER:
            return "error while reading header, or invalid header";
        case EVREQ_HTTP_BUFFER_ERROR:
            return "error encountered while reading or writing";
        case EVREQ_HTTP_REQUEST_CANCEL:
            return "request was canceled";
        case EVREQ_HTTP_DATA_TOO_LONG:
            return "response body is larger than allowed";
#endif
        default:
            return "unknown";
    }
}

static void http_request_done(struct evhttp_request *req, void *ctx) {
    HTTPReply *reply = static_cast<HTTPReply *>(ctx);

    if (req == nullptr) {
        reply->status = 0;
        return;
    }

    reply->status = evhttp_request_get_response_code(req);

    struct evbuffer *buf = evhttp_request_get_input_buffer(req);
    if (buf) {
        size_t size = evbuffer_get_length(buf);
        const char *data = (const char *)evbuffer_pullup(buf, size);
        if (data) {
            reply->body = std::string(data, size);
        }
        evbuffer_drain(buf, size);
    }
}

#if LIBEVENT_VERSION_NUMBER >= 0x02010300
static void http_error_cb(enum evhttp_request_error err, void *ctx) {
    HTTPReply *reply = static_cast<HTTPReply *>(ctx);
    reply->error = err;
}
#endif

class BaseRequestHandler {
public:
    virtual ~BaseRequestHandler() {}
    virtual UniValue PrepareRequest(const std::string &method,
                                    const std::vector<std::string> &args) = 0;
    virtual UniValue ProcessReply(const UniValue &batch_in) = 0;
};

class GetinfoRequestHandler : public BaseRequestHandler {
public:
    const int ID_NETWORKINFO = 0;
    const int ID_BLOCKCHAININFO = 1;
    const int ID_WALLETINFO = 2;
    const int ID_BALANCES = 3;

    UniValue PrepareRequest(const std::string &method,
                            const std::vector<std::string> &args) override {
        if (!args.empty()) {
            throw std::runtime_error("-getinfo takes no arguments");
        }
        UniValue result(UniValue::VARR);
        result.push_back(
            JSONRPCRequestObj("getnetworkinfo", NullUniValue, ID_NETWORKINFO));
        result.push_back(JSONRPCRequestObj("getblockchaininfo", NullUniValue,
                                           ID_BLOCKCHAININFO));
        result.push_back(
            JSONRPCRequestObj("getwalletinfo", NullUniValue, ID_WALLETINFO));
        result.push_back(
            JSONRPCRequestObj("getbalances", NullUniValue, ID_BALANCES));
        return result;
    }

    UniValue ProcessReply(const UniValue &batch_in) override {
        UniValue result(UniValue::VOBJ);
        std::vector<UniValue> batch =
            JSONRPCProcessBatchReply(batch_in, batch_in.size());
        // Errors in getnetworkinfo() and getblockchaininfo() are fatal, pass
        // them on; getwalletinfo() and getbalances are allowed to fail if there
        // is no wallet.
        if (!batch[ID_NETWORKINFO]["error"].isNull()) {
            return batch[ID_NETWORKINFO];
        }
        if (!batch[ID_BLOCKCHAININFO]["error"].isNull()) {
            return batch[ID_BLOCKCHAININFO];
        }
        result.pushKV("version", batch[ID_NETWORKINFO]["result"]["version"]);
        result.pushKV("blocks", batch[ID_BLOCKCHAININFO]["result"]["blocks"]);
        result.pushKV("headers", batch[ID_BLOCKCHAININFO]["result"]["headers"]);
        result.pushKV(
            "verificationprogress",
            batch[ID_BLOCKCHAININFO]["result"]["verificationprogress"]);
        result.pushKV("timeoffset",
                      batch[ID_NETWORKINFO]["result"]["timeoffset"]);
        result.pushKV("connections",
                      batch[ID_NETWORKINFO]["result"]["connections"]);
        result.pushKV("proxy",
                      batch[ID_NETWORKINFO]["result"]["networks"][0]["proxy"]);
        result.pushKV("difficulty",
                      batch[ID_BLOCKCHAININFO]["result"]["difficulty"]);
        result.pushKV("chain",
                      UniValue(batch[ID_BLOCKCHAININFO]["result"]["chain"]));
        if (!batch[ID_WALLETINFO]["result"].isNull()) {
            result.pushKV("keypoolsize",
                          batch[ID_WALLETINFO]["result"]["keypoolsize"]);
            if (!batch[ID_WALLETINFO]["result"]["unlocked_until"].isNull()) {
                result.pushKV("unlocked_until",
                              batch[ID_WALLETINFO]["result"]["unlocked_until"]);
            }
            result.pushKV("paytxfee",
                          batch[ID_WALLETINFO]["result"]["paytxfee"]);
        }
        if (!batch[ID_BALANCES]["result"].isNull()) {
            result.pushKV("balance",
                          batch[ID_BALANCES]["result"]["mine"]["trusted"]);
        }
        result.pushKV("relayfee", batch[ID_NETWORKINFO]["result"]["relayfee"]);
        result.pushKV("warnings", batch[ID_NETWORKINFO]["result"]["warnings"]);
        return JSONRPCReplyObj(result, NullUniValue, 1);
    }
};

class DefaultRequestHandler : public BaseRequestHandler {
public:
    UniValue PrepareRequest(const std::string &method,
                            const std::vector<std::string> &args) override {
        UniValue params;
        if (gArgs.GetBoolArg("-named", DEFAULT_NAMED)) {
            params = RPCConvertNamedValues(method, args);
        } else {
            params = RPCConvertValues(method, args);
        }
        return JSONRPCRequestObj(method, params, 1);
    }

    UniValue ProcessReply(const UniValue &reply) override {
        return reply.get_obj();
    }
};

static UniValue CallRPC(BaseRequestHandler *rh, const std::string &strMethod,
                        const std::vector<std::string> &args) {
    std::string host;
    // In preference order, we choose the following for the port:
    //     1. -rpcport
    //     2. port in -rpcconnect (ie following : in ipv4 or ]: in ipv6)
    //     3. default port for chain
    int port = BaseParams().RPCPort();
    SplitHostPort(gArgs.GetArg("-rpcconnect", DEFAULT_RPCCONNECT), port, host);
    port = gArgs.GetArg("-rpcport", port);

    // Obtain event base
    raii_event_base base = obtain_event_base();

    // Synchronously look up hostname
    raii_evhttp_connection evcon =
        obtain_evhttp_connection_base(base.get(), host, port);

    // Set connection timeout
    {
        const int timeout =
            gArgs.GetArg("-rpcclienttimeout", DEFAULT_HTTP_CLIENT_TIMEOUT);
        if (timeout > 0) {
            evhttp_connection_set_timeout(evcon.get(), timeout);
        } else {
            // Indefinite request timeouts are not possible in libevent-http,
            // so we set the timeout to a very long time period instead.

            // Average length of year in Gregorian calendar
            constexpr int YEAR_IN_SECONDS = 31556952;
            evhttp_connection_set_timeout(evcon.get(), 5 * YEAR_IN_SECONDS);
        }
    }

    HTTPReply response;
    raii_evhttp_request req =
        obtain_evhttp_request(http_request_done, (void *)&response);
    if (req == nullptr) {
        throw std::runtime_error("create http request failed");
    }
#if LIBEVENT_VERSION_NUMBER >= 0x02010300
    evhttp_request_set_error_cb(req.get(), http_error_cb);
#endif

    // Get credentials
    std::string strRPCUserColonPass;
    bool failedToGetAuthCookie = false;
    if (gArgs.GetArg("-rpcpassword", "") == "") {
        // Try fall back to cookie-based authentication if no password is
        // provided
        if (!GetAuthCookie(&strRPCUserColonPass)) {
            failedToGetAuthCookie = true;
        }
    } else {
        strRPCUserColonPass = gArgs.GetArg("-rpcuser", "") + ":" +
                              gArgs.GetArg("-rpcpassword", "");
    }

    struct evkeyvalq *output_headers =
        evhttp_request_get_output_headers(req.get());
    assert(output_headers);
    evhttp_add_header(output_headers, "Host", host.c_str());
    evhttp_add_header(output_headers, "Connection", "close");
    evhttp_add_header(
        output_headers, "Authorization",
        (std::string("Basic ") + EncodeBase64(strRPCUserColonPass)).c_str());

    // Attach request data
    std::string strRequest = rh->PrepareRequest(strMethod, args).write() + "\n";
    struct evbuffer *output_buffer =
        evhttp_request_get_output_buffer(req.get());
    assert(output_buffer);
    evbuffer_add(output_buffer, strRequest.data(), strRequest.size());

    // check if we should use a special wallet endpoint
    std::string endpoint = "/";
    if (!gArgs.GetArgs("-rpcwallet").empty()) {
        std::string walletName = gArgs.GetArg("-rpcwallet", "");
        char *encodedURI =
            evhttp_uriencode(walletName.data(), walletName.size(), false);
        if (encodedURI) {
            endpoint = "/wallet/" + std::string(encodedURI);
            free(encodedURI);
        } else {
            throw CConnectionFailed("uri-encode failed");
        }
    }
    int r = evhttp_make_request(evcon.get(), req.get(), EVHTTP_REQ_POST,
                                endpoint.c_str());
    // ownership moved to evcon in above call
    req.release();
    if (r != 0) {
        throw CConnectionFailed("send http request failed");
    }

    event_base_dispatch(base.get());

    if (response.status == 0) {
        std::string responseErrorMessage;
        if (response.error != -1) {
            responseErrorMessage =
                strprintf(" (error code %d - \"%s\")", response.error,
                          http_errorstring(response.error));
        }
        throw CConnectionFailed(
            strprintf("Could not connect to the server %s:%d%s\n\nMake sure "
                      "the bitcoind server is running and that you are "
                      "connecting to the correct RPC port.",
                      host, port, responseErrorMessage));
    } else if (response.status == HTTP_UNAUTHORIZED) {
        if (failedToGetAuthCookie) {
            throw std::runtime_error(strprintf(
                "Could not locate RPC credentials. No authentication cookie "
                "could be found, and RPC password is not set.  See "
                "-rpcpassword and -stdinrpcpass.  Configuration file: (%s)",
                GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME))
                    .string()));
        } else {
            throw std::runtime_error(
                "Authorization failed: Incorrect rpcuser or rpcpassword");
        }
    } else if (response.status >= 400 && response.status != HTTP_BAD_REQUEST &&
               response.status != HTTP_NOT_FOUND &&
               response.status != HTTP_INTERNAL_SERVER_ERROR) {
        throw std::runtime_error(
            strprintf("server returned HTTP error %d", response.status));
    } else if (response.body.empty()) {
        throw std::runtime_error("no response from server");
    }

    // Parse reply
    UniValue valReply(UniValue::VSTR);
    if (!valReply.read(response.body)) {
        throw std::runtime_error("couldn't parse reply from server");
    }
    const UniValue reply = rh->ProcessReply(valReply);
    if (reply.empty()) {
        throw std::runtime_error(
            "expected reply to have result, error and id properties");
    }

    return reply;
}

static int CommandLineRPC(int argc, char *argv[]) {
    std::string strPrint;
    int nRet = 0;
    try {
        // Skip switches
        while (argc > 1 && IsSwitchChar(argv[1][0])) {
            argc--;
            argv++;
        }
        std::string rpcPass;
        if (gArgs.GetBoolArg("-stdinrpcpass", false)) {
            NO_STDIN_ECHO();
            if (!StdinReady()) {
                fputs("RPC password> ", stderr);
                fflush(stderr);
            }
            if (!std::getline(std::cin, rpcPass)) {
                throw std::runtime_error("-stdinrpcpass specified but failed "
                                         "to read from standard input");
            }
            if (StdinTerminal()) {
                fputc('\n', stdout);
            }
            gArgs.ForceSetArg("-rpcpassword", rpcPass);
        }
        std::vector<std::string> args =
            std::vector<std::string>(&argv[1], &argv[argc]);
        if (gArgs.GetBoolArg("-stdinwalletpassphrase", false)) {
            NO_STDIN_ECHO();
            std::string walletPass;
            if (args.size() < 1 ||
                args[0].substr(0, 16) != "walletpassphrase") {
                throw std::runtime_error(
                    "-stdinwalletpassphrase is only applicable for "
                    "walletpassphrase(change)");
            }
            if (!StdinReady()) {
                fputs("Wallet passphrase> ", stderr);
                fflush(stderr);
            }
            if (!std::getline(std::cin, walletPass)) {
                throw std::runtime_error("-stdinwalletpassphrase specified but "
                                         "failed to read from standard input");
            }
            if (StdinTerminal()) {
                fputc('\n', stdout);
            }
            args.insert(args.begin() + 1, walletPass);
        }
        if (gArgs.GetBoolArg("-stdin", false)) {
            // Read one arg per line from stdin and append
            std::string line;
            while (std::getline(std::cin, line)) {
                args.push_back(line);
            }
            if (StdinTerminal()) {
                fputc('\n', stdout);
            }
        }
        std::unique_ptr<BaseRequestHandler> rh;
        std::string method;
        if (gArgs.GetBoolArg("-getinfo", false)) {
            rh.reset(new GetinfoRequestHandler());
            method = "";
        } else {
            rh.reset(new DefaultRequestHandler());
            if (args.size() < 1) {
                throw std::runtime_error(
                    "too few parameters (need at least command)");
            }
            method = args[0];
            // Remove trailing method name from arguments vector
            args.erase(args.begin());
        }

        // Execute and handle connection failures with -rpcwait
        const bool fWait = gArgs.GetBoolArg("-rpcwait", false);
        do {
            try {
                const UniValue reply = CallRPC(rh.get(), method, args);

                // Parse reply
                const UniValue &result = find_value(reply, "result");
                const UniValue &error = find_value(reply, "error");

                if (!error.isNull()) {
                    // Error
                    int code = error["code"].get_int();
                    if (fWait && code == RPC_IN_WARMUP) {
                        throw CConnectionFailed("server in warmup");
                    }
                    strPrint = "error: " + error.write();
                    nRet = abs(code);
                    if (error.isObject()) {
                        UniValue errCode = find_value(error, "code");
                        UniValue errMsg = find_value(error, "message");
                        strPrint =
                            errCode.isNull()
                                ? ""
                                : "error code: " + errCode.getValStr() + "\n";

                        if (errMsg.isStr()) {
                            strPrint += "error message:\n" + errMsg.get_str();
                        }

                        if (errCode.isNum() &&
                            errCode.get_int() == RPC_WALLET_NOT_SPECIFIED) {
                            strPrint += "\nTry adding "
                                        "\"-rpcwallet=<filename>\" option to "
                                        "bitcoin-cli command line.";
                        }
                    }
                } else {
                    // Result
                    if (result.isNull()) {
                        strPrint = "";
                    } else if (result.isStr()) {
                        strPrint = result.get_str();
                    } else {
                        strPrint = result.write(2);
                    }
                }
                // Connection succeeded, no need to retry.
                break;
            } catch (const CConnectionFailed &) {
                if (fWait) {
                    UninterruptibleSleep(std::chrono::milliseconds{1000});
                } else {
                    throw;
                }
            }
        } while (fWait);
    } catch (const std::exception &e) {
        strPrint = std::string("error: ") + e.what();
        nRet = EXIT_FAILURE;
    } catch (...) {
        PrintExceptionContinue(nullptr, "CommandLineRPC()");
        throw;
    }

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

int main(int argc, char *argv[]) {
#ifdef WIN32
    util::WinCmdLineArgs winArgs;
    std::tie(argc, argv) = winArgs.get();
#endif
    SetupEnvironment();
    if (!SetupNetworking()) {
        tfm::format(std::cerr, "Error: Initializing networking failed\n");
        return EXIT_FAILURE;
    }
    event_set_log_callback(&libevent_log_cb);

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

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