masternode.cpp

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// Copyright (c) 2014-2017 The Dash Core developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "activemasternode.h"
#include "init.h"
#include "netbase.h"
#include "validation.h"
#include "masternode-payments.h"
#include "masternode-sync.h"
#include "masternodeconfig.h"
#include "masternodeman.h"
#include "privatesend-client.h"
#include "privatesend-server.h"
#include "rpc/server.h"
#include "util.h"
#include "utilmoneystr.h"

#include <fstream>
#include <iomanip>
#include <univalue.h>

void EnsureWalletIsUnlocked();

UniValue privatesend(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw std::runtime_error(
            "privatesend \"command\"\n"
            "\nArguments:\n"
            "1. \"command\"        (string or set of strings, required) The command to execute\n"
            "\nAvailable commands:\n"
            "  start       - Start mixing\n"
            "  stop        - Stop mixing\n"
            "  reset       - Reset mixing\n"
            );

    if(params[0].get_str() == "start") {
        {
            LOCK(pwalletMain->cs_wallet);
            EnsureWalletIsUnlocked();
        }

        if(fMasterNode)
            return "Mixing is not supported from masternodes";

        privateSendClient.fEnablePrivateSend = true;
        bool result = privateSendClient.DoAutomaticDenominating(*g_connman);
        return "Mixing " + (result ? "started successfully" : ("start failed: " + privateSendClient.GetStatus() + ", will retry"));
    }

    if(params[0].get_str() == "stop") {
        privateSendClient.fEnablePrivateSend = false;
        return "Mixing was stopped";
    }

    if(params[0].get_str() == "reset") {
        privateSendClient.ResetPool();
        return "Mixing was reset";
    }

    return "Unknown command, please see \"help privatesend\"";
}

UniValue getpoolinfo(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw std::runtime_error(
            "getpoolinfo\n"
            "Returns an object containing mixing pool related information.\n");

    CPrivateSendBase privateSend = fMasterNode ? (CPrivateSendBase)privateSendServer : (CPrivateSendBase)privateSendClient;

    UniValue obj(UniValue::VOBJ);
    obj.push_back(Pair("state",             privateSend.GetStateString()));
    obj.push_back(Pair("mixing_mode",       (!fMasterNode && privateSendClient.fPrivateSendMultiSession) ? "multi-session" : "normal"));
    obj.push_back(Pair("queue",             privateSend.GetQueueSize()));
    obj.push_back(Pair("entries",           privateSend.GetEntriesCount()));
    obj.push_back(Pair("status",            privateSendClient.GetStatus()));

    if (privateSendClient.infoMixingMasternode.fInfoValid) {
        obj.push_back(Pair("outpoint",      privateSendClient.infoMixingMasternode.vin.prevout.ToStringShort()));
        obj.push_back(Pair("addr",          privateSendClient.infoMixingMasternode.addr.ToString()));
    }

    if (pwalletMain) {
        obj.push_back(Pair("keys_left",     pwalletMain->nKeysLeftSinceAutoBackup));
        obj.push_back(Pair("warnings",      pwalletMain->nKeysLeftSinceAutoBackup < PRIVATESEND_KEYS_THRESHOLD_WARNING
                                                ? "WARNING: keypool is almost depleted!" : ""));
    }

    return obj;
}


UniValue masternode(const UniValue& params, bool fHelp)
{
    std::string strCommand;
    if (params.size() >= 1) {
        strCommand = params[0].get_str();
    }

    if (strCommand == "start-many")
        throw JSONRPCError(RPC_INVALID_PARAMETER, "DEPRECATED, please use start-all instead");

    if (fHelp  ||
        (strCommand != "start" && strCommand != "start-alias" && strCommand != "start-all" && strCommand != "start-missing" &&
         strCommand != "start-disabled" && strCommand != "list" && strCommand != "list-conf" && strCommand != "count" &&
         strCommand != "debug" && strCommand != "current" && strCommand != "winner" && strCommand != "winners" && strCommand != "genkey" &&
         strCommand != "connect" && strCommand != "outputs" && strCommand != "status"))
            throw std::runtime_error(
                "masternode \"command\"...\n"
                "Set of commands to execute masternode related actions\n"
                "\nArguments:\n"
                "1. \"command\"        (string or set of strings, required) The command to execute\n"
                "\nAvailable commands:\n"
                "  count        - Print number of all known masternodes (optional: 'ps', 'enabled', 'all', 'qualify')\n"
                "  current      - Print info on current masternode winner to be paid the next block (calculated locally)\n"
                "  debug        - Print masternode status\n"
                "  genkey       - Generate new masternodeprivkey\n"
                "  outputs      - Print masternode compatible outputs\n"
                "  start        - Start local Hot masternode configured in dash.conf\n"
                "  start-alias  - Start single remote masternode by assigned alias configured in masternode.conf\n"
                "  start-<mode> - Start remote masternodes configured in masternode.conf (<mode>: 'all', 'missing', 'disabled')\n"
                "  status       - Print masternode status information\n"
                "  list         - Print list of all known masternodes (see masternodelist for more info)\n"
                "  list-conf    - Print masternode.conf in JSON format\n"
                "  winner       - Print info on next masternode winner to vote for\n"
                "  winners      - Print list of masternode winners\n"
                );

    if (strCommand == "list")
    {
        UniValue newParams(UniValue::VARR);
        // forward params but skip "list"
        for (unsigned int i = 1; i < params.size(); i++) {
            newParams.push_back(params[i]);
        }
        return masternodelist(newParams, fHelp);
    }

    if(strCommand == "connect")
    {
        if (params.size() < 2)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Masternode address required");

        std::string strAddress = params[1].get_str();

        CService addr;
        if (!Lookup(strAddress.c_str(), addr, 0, false))
            throw JSONRPCError(RPC_INTERNAL_ERROR, strprintf("Incorrect masternode address %s", strAddress));

        // TODO: Pass CConnman instance somehow and don't use global variable.
        CNode *pnode = g_connman->ConnectNode(CAddress(addr, NODE_NETWORK), NULL);
        if(!pnode)
            throw JSONRPCError(RPC_INTERNAL_ERROR, strprintf("Couldn't connect to masternode %s", strAddress));

        return "successfully connected";
    }

    if (strCommand == "count")
    {
        if (params.size() > 2)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Too many parameters");

        if (params.size() == 1)
            return mnodeman.size();

        std::string strMode = params[1].get_str();

        if (strMode == "ps")
            return mnodeman.CountEnabled(MIN_PRIVATESEND_PEER_PROTO_VERSION);

        if (strMode == "enabled")
            return mnodeman.CountEnabled();

        int nCount;
        masternode_info_t mnInfo;
        mnodeman.GetNextMasternodeInQueueForPayment(true, nCount, mnInfo);

        if (strMode == "qualify")
            return nCount;

        if (strMode == "all")
            return strprintf("Total: %d (PS Compatible: %d / Enabled: %d / Qualify: %d)",
                mnodeman.size(), mnodeman.CountEnabled(MIN_PRIVATESEND_PEER_PROTO_VERSION),
                mnodeman.CountEnabled(), nCount);
    }

    if (strCommand == "current" || strCommand == "winner")
    {
        int nCount;
        int nHeight;
        masternode_info_t mnInfo;
        CBlockIndex* pindex = NULL;
        {
            LOCK(cs_main);
            pindex = chainActive.Tip();
        }
        nHeight = pindex->nHeight + (strCommand == "current" ? 1 : 10);
        mnodeman.UpdateLastPaid(pindex);

        if(!mnodeman.GetNextMasternodeInQueueForPayment(nHeight, true, nCount, mnInfo))
            return "unknown";

        UniValue obj(UniValue::VOBJ);

        obj.push_back(Pair("height",        nHeight));
        obj.push_back(Pair("IP:port",       mnInfo.addr.ToString()));
        obj.push_back(Pair("protocol",      (int64_t)mnInfo.nProtocolVersion));
        obj.push_back(Pair("outpoint",      mnInfo.vin.prevout.ToStringShort()));
        obj.push_back(Pair("payee",         CBitcoinAddress(mnInfo.pubKeyCollateralAddress.GetID()).ToString()));
        obj.push_back(Pair("lastseen",      mnInfo.nTimeLastPing));
        obj.push_back(Pair("activeseconds", mnInfo.nTimeLastPing - mnInfo.sigTime));
        return obj;
    }

    if (strCommand == "debug")
    {
        if(activeMasternode.nState != ACTIVE_MASTERNODE_INITIAL || !masternodeSync.IsBlockchainSynced())
            return activeMasternode.GetStatus();

        COutPoint outpoint;
        CPubKey pubkey;
        CKey key;

        if(!pwalletMain || !pwalletMain->GetMasternodeOutpointAndKeys(outpoint, pubkey, key))
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Missing masternode input, please look at the documentation for instructions on masternode creation");

        return activeMasternode.GetStatus();
    }

    if (strCommand == "start")
    {
        if(!fMasterNode)
            throw JSONRPCError(RPC_INTERNAL_ERROR, "You must set masternode=1 in the configuration");

        {
            LOCK(pwalletMain->cs_wallet);
            EnsureWalletIsUnlocked();
        }

        if(activeMasternode.nState != ACTIVE_MASTERNODE_STARTED){
            activeMasternode.nState = ACTIVE_MASTERNODE_INITIAL; // TODO: consider better way
            activeMasternode.ManageState(*g_connman);
        }

        return activeMasternode.GetStatus();
    }

    if (strCommand == "start-alias")
    {
        if (params.size() < 2)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Please specify an alias");

        {
            LOCK(pwalletMain->cs_wallet);
            EnsureWalletIsUnlocked();
        }

        std::string strAlias = params[1].get_str();

        bool fFound = false;

        UniValue statusObj(UniValue::VOBJ);
        statusObj.push_back(Pair("alias", strAlias));

        BOOST_FOREACH(CMasternodeConfig::CMasternodeEntry mne, masternodeConfig.getEntries()) {
            if(mne.getAlias() == strAlias) {
                fFound = true;
                std::string strError;
                CMasternodeBroadcast mnb;

                bool fResult = CMasternodeBroadcast::Create(mne.getIp(), mne.getPrivKey(), mne.getTxHash(), mne.getOutputIndex(), strError, mnb);

                statusObj.push_back(Pair("result", fResult ? "successful" : "failed"));
                if(fResult) {
                    mnodeman.UpdateMasternodeList(mnb, *g_connman);
                    mnb.Relay(*g_connman);
                } else {
                    statusObj.push_back(Pair("errorMessage", strError));
                }
                mnodeman.NotifyMasternodeUpdates(*g_connman);
                break;
            }
        }

        if(!fFound) {
            statusObj.push_back(Pair("result", "failed"));
            statusObj.push_back(Pair("errorMessage", "Could not find alias in config. Verify with list-conf."));
        }

        return statusObj;

    }

    if (strCommand == "start-all" || strCommand == "start-missing" || strCommand == "start-disabled")
    {
        {
            LOCK(pwalletMain->cs_wallet);
            EnsureWalletIsUnlocked();
        }

        if((strCommand == "start-missing" || strCommand == "start-disabled") && !masternodeSync.IsMasternodeListSynced()) {
            throw JSONRPCError(RPC_CLIENT_IN_INITIAL_DOWNLOAD, "You can't use this command until masternode list is synced");
        }

        int nSuccessful = 0;
        int nFailed = 0;

        UniValue resultsObj(UniValue::VOBJ);

        BOOST_FOREACH(CMasternodeConfig::CMasternodeEntry mne, masternodeConfig.getEntries()) {
            std::string strError;

            COutPoint outpoint = COutPoint(uint256S(mne.getTxHash()), uint32_t(atoi(mne.getOutputIndex().c_str())));
            CMasternode mn;
            bool fFound = mnodeman.Get(outpoint, mn);
            CMasternodeBroadcast mnb;

            if(strCommand == "start-missing" && fFound) continue;
            if(strCommand == "start-disabled" && fFound && mn.IsEnabled()) continue;

            bool fResult = CMasternodeBroadcast::Create(mne.getIp(), mne.getPrivKey(), mne.getTxHash(), mne.getOutputIndex(), strError, mnb);

            UniValue statusObj(UniValue::VOBJ);
            statusObj.push_back(Pair("alias", mne.getAlias()));
            statusObj.push_back(Pair("result", fResult ? "successful" : "failed"));

            if (fResult) {
                nSuccessful++;
                mnodeman.UpdateMasternodeList(mnb, *g_connman);
                mnb.Relay(*g_connman);
            } else {
                nFailed++;
                statusObj.push_back(Pair("errorMessage", strError));
            }

            resultsObj.push_back(Pair("status", statusObj));
        }
        mnodeman.NotifyMasternodeUpdates(*g_connman);

        UniValue returnObj(UniValue::VOBJ);
        returnObj.push_back(Pair("overall", strprintf("Successfully started %d masternodes, failed to start %d, total %d", nSuccessful, nFailed, nSuccessful + nFailed)));
        returnObj.push_back(Pair("detail", resultsObj));

        return returnObj;
    }

    if (strCommand == "genkey")
    {
        CKey secret;
        secret.MakeNewKey(false);

        return CBitcoinSecret(secret).ToString();
    }

    if (strCommand == "list-conf")
    {
        UniValue resultObj(UniValue::VOBJ);

        BOOST_FOREACH(CMasternodeConfig::CMasternodeEntry mne, masternodeConfig.getEntries()) {
            COutPoint outpoint = COutPoint(uint256S(mne.getTxHash()), uint32_t(atoi(mne.getOutputIndex().c_str())));
            CMasternode mn;
            bool fFound = mnodeman.Get(outpoint, mn);

            std::string strStatus = fFound ? mn.GetStatus() : "MISSING";

            UniValue mnObj(UniValue::VOBJ);
            mnObj.push_back(Pair("alias", mne.getAlias()));
            mnObj.push_back(Pair("address", mne.getIp()));
            mnObj.push_back(Pair("privateKey", mne.getPrivKey()));
            mnObj.push_back(Pair("txHash", mne.getTxHash()));
            mnObj.push_back(Pair("outputIndex", mne.getOutputIndex()));
            mnObj.push_back(Pair("status", strStatus));
            resultObj.push_back(Pair("masternode", mnObj));
        }

        return resultObj;
    }

    if (strCommand == "outputs") {
        // Find possible candidates
        std::vector<COutput> vPossibleCoins;
        pwalletMain->AvailableCoins(vPossibleCoins, true, NULL, false, ONLY_1000);

        UniValue obj(UniValue::VOBJ);
        BOOST_FOREACH(COutput& out, vPossibleCoins) {
            obj.push_back(Pair(out.tx->GetHash().ToString(), strprintf("%d", out.i)));
        }

        return obj;

    }

    if (strCommand == "status")
    {
        if (!fMasterNode)
            throw JSONRPCError(RPC_INTERNAL_ERROR, "This is not a masternode");

        UniValue mnObj(UniValue::VOBJ);

        mnObj.push_back(Pair("outpoint", activeMasternode.outpoint.ToStringShort()));
        mnObj.push_back(Pair("service", activeMasternode.service.ToString()));

        CMasternode mn;
        if(mnodeman.Get(activeMasternode.outpoint, mn)) {
            mnObj.push_back(Pair("payee", CBitcoinAddress(mn.pubKeyCollateralAddress.GetID()).ToString()));
        }

        mnObj.push_back(Pair("status", activeMasternode.GetStatus()));
        return mnObj;
    }

    if (strCommand == "winners")
    {
        int nHeight;
        {
            LOCK(cs_main);
            CBlockIndex* pindex = chainActive.Tip();
            if(!pindex) return NullUniValue;

            nHeight = pindex->nHeight;
        }

        int nLast = 10;
        std::string strFilter = "";

        if (params.size() >= 2) {
            nLast = atoi(params[1].get_str());
        }

        if (params.size() == 3) {
            strFilter = params[2].get_str();
        }

        if (params.size() > 3)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Correct usage is 'masternode winners ( \"count\" \"filter\" )'");

        UniValue obj(UniValue::VOBJ);

        for(int i = nHeight - nLast; i < nHeight + 20; i++) {
            std::string strPayment = GetRequiredPaymentsString(i);
            if (strFilter !="" && strPayment.find(strFilter) == std::string::npos) continue;
            obj.push_back(Pair(strprintf("%d", i), strPayment));
        }

        return obj;
    }

    return NullUniValue;
}

UniValue masternodelist(const UniValue& params, bool fHelp)
{
    std::string strMode = "status";
    std::string strFilter = "";

    if (params.size() >= 1) strMode = params[0].get_str();
    if (params.size() == 2) strFilter = params[1].get_str();

    if (fHelp || (
                strMode != "activeseconds" && strMode != "addr" && strMode != "full" && strMode != "info" &&
                strMode != "lastseen" && strMode != "lastpaidtime" && strMode != "lastpaidblock" &&
                strMode != "protocol" && strMode != "payee" && strMode != "pubkey" &&
                strMode != "rank" && strMode != "status"))
    {
        throw std::runtime_error(
                "masternodelist ( \"mode\" \"filter\" )\n"
                "Get a list of masternodes in different modes\n"
                "\nArguments:\n"
                "1. \"mode\"      (string, optional/required to use filter, defaults = status) The mode to run list in\n"
                "2. \"filter\"    (string, optional) Filter results. Partial match by outpoint by default in all modes,\n"
                "                                    additional matches in some modes are also available\n"
                "\nAvailable modes:\n"
                "  activeseconds  - Print number of seconds masternode recognized by the network as enabled\n"
                "                   (since latest issued \"masternode start/start-many/start-alias\")\n"
                "  addr           - Print ip address associated with a masternode (can be additionally filtered, partial match)\n"
                "  full           - Print info in format 'status protocol payee lastseen activeseconds lastpaidtime lastpaidblock IP'\n"
                "                   (can be additionally filtered, partial match)\n"
                "  info           - Print info in format 'status protocol payee lastseen activeseconds sentinelversion sentinelstate IP'\n"
                "                   (can be additionally filtered, partial match)\n"
                "  lastpaidblock  - Print the last block height a node was paid on the network\n"
                "  lastpaidtime   - Print the last time a node was paid on the network\n"
                "  lastseen       - Print timestamp of when a masternode was last seen on the network\n"
                "  payee          - Print Dash address associated with a masternode (can be additionally filtered,\n"
                "                   partial match)\n"
                "  protocol       - Print protocol of a masternode (can be additionally filtered, exact match))\n"
                "  pubkey         - Print the masternode (not collateral) public key\n"
                "  rank           - Print rank of a masternode based on current block\n"
                "  status         - Print masternode status: PRE_ENABLED / ENABLED / EXPIRED / WATCHDOG_EXPIRED / NEW_START_REQUIRED /\n"
                "                   UPDATE_REQUIRED / POSE_BAN / OUTPOINT_SPENT (can be additionally filtered, partial match)\n"
                );
    }

    if (strMode == "full" || strMode == "lastpaidtime" || strMode == "lastpaidblock") {
        CBlockIndex* pindex = NULL;
        {
            LOCK(cs_main);
            pindex = chainActive.Tip();
        }
        mnodeman.UpdateLastPaid(pindex);
    }

    UniValue obj(UniValue::VOBJ);
    if (strMode == "rank") {
        CMasternodeMan::rank_pair_vec_t vMasternodeRanks;
        mnodeman.GetMasternodeRanks(vMasternodeRanks);
        BOOST_FOREACH(PAIRTYPE(int, CMasternode)& s, vMasternodeRanks) {
            std::string strOutpoint = s.second.vin.prevout.ToStringShort();
            if (strFilter !="" && strOutpoint.find(strFilter) == std::string::npos) continue;
            obj.push_back(Pair(strOutpoint, s.first));
        }
    } else {
        std::map<COutPoint, CMasternode> mapMasternodes = mnodeman.GetFullMasternodeMap();
        for (auto& mnpair : mapMasternodes) {
            CMasternode mn = mnpair.second;
            std::string strOutpoint = mnpair.first.ToStringShort();
            if (strMode == "activeseconds") {
                if (strFilter !="" && strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, (int64_t)(mn.lastPing.sigTime - mn.sigTime)));
            } else if (strMode == "addr") {
                std::string strAddress = mn.addr.ToString();
                if (strFilter !="" && strAddress.find(strFilter) == std::string::npos &&
                    strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, strAddress));
            } else if (strMode == "full") {
                std::ostringstream streamFull;
                streamFull << std::setw(18) <<
                               mn.GetStatus() << " " <<
                               mn.nProtocolVersion << " " <<
                               CBitcoinAddress(mn.pubKeyCollateralAddress.GetID()).ToString() << " " <<
                               (int64_t)mn.lastPing.sigTime << " " << std::setw(8) <<
                               (int64_t)(mn.lastPing.sigTime - mn.sigTime) << " " << std::setw(10) <<
                               mn.GetLastPaidTime() << " "  << std::setw(6) <<
                               mn.GetLastPaidBlock() << " " <<
                               mn.addr.ToString();
                std::string strFull = streamFull.str();
                if (strFilter !="" && strFull.find(strFilter) == std::string::npos &&
                    strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, strFull));
            } else if (strMode == "info") {
                std::ostringstream streamInfo;
                streamInfo << std::setw(18) <<
                               mn.GetStatus() << " " <<
                               mn.nProtocolVersion << " " <<
                               CBitcoinAddress(mn.pubKeyCollateralAddress.GetID()).ToString() << " " <<
                               (int64_t)mn.lastPing.sigTime << " " << std::setw(8) <<
                               (int64_t)(mn.lastPing.sigTime - mn.sigTime) << " " <<
                               SafeIntVersionToString(mn.lastPing.nSentinelVersion) << " "  <<
                               (mn.lastPing.fSentinelIsCurrent ? "current" : "expired") << " " <<
                               mn.addr.ToString();
                std::string strInfo = streamInfo.str();
                if (strFilter !="" && strInfo.find(strFilter) == std::string::npos &&
                    strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, strInfo));
            } else if (strMode == "lastpaidblock") {
                if (strFilter !="" && strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, mn.GetLastPaidBlock()));
            } else if (strMode == "lastpaidtime") {
                if (strFilter !="" && strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, mn.GetLastPaidTime()));
            } else if (strMode == "lastseen") {
                if (strFilter !="" && strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, (int64_t)mn.lastPing.sigTime));
            } else if (strMode == "payee") {
                CBitcoinAddress address(mn.pubKeyCollateralAddress.GetID());
                std::string strPayee = address.ToString();
                if (strFilter !="" && strPayee.find(strFilter) == std::string::npos &&
                    strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, strPayee));
            } else if (strMode == "protocol") {
                if (strFilter !="" && strFilter != strprintf("%d", mn.nProtocolVersion) &&
                    strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, (int64_t)mn.nProtocolVersion));
            } else if (strMode == "pubkey") {
                if (strFilter !="" && strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, HexStr(mn.pubKeyMasternode)));
            } else if (strMode == "status") {
                std::string strStatus = mn.GetStatus();
                if (strFilter !="" && strStatus.find(strFilter) == std::string::npos &&
                    strOutpoint.find(strFilter) == std::string::npos) continue;
                obj.push_back(Pair(strOutpoint, strStatus));
            }
        }
    }
    return obj;
}

bool DecodeHexVecMnb(std::vector<CMasternodeBroadcast>& vecMnb, std::string strHexMnb) {

    if (!IsHex(strHexMnb))
        return false;

    std::vector<unsigned char> mnbData(ParseHex(strHexMnb));
    CDataStream ssData(mnbData, SER_NETWORK, PROTOCOL_VERSION);
    try {
        ssData >> vecMnb;
    }
    catch (const std::exception&) {
        return false;
    }

    return true;
}

UniValue masternodebroadcast(const UniValue& params, bool fHelp)
{
    std::string strCommand;
    if (params.size() >= 1)
        strCommand = params[0].get_str();

    if (fHelp  ||
        (strCommand != "create-alias" && strCommand != "create-all" && strCommand != "decode" && strCommand != "relay"))
        throw std::runtime_error(
                "masternodebroadcast \"command\"...\n"
                "Set of commands to create and relay masternode broadcast messages\n"
                "\nArguments:\n"
                "1. \"command\"        (string or set of strings, required) The command to execute\n"
                "\nAvailable commands:\n"
                "  create-alias  - Create single remote masternode broadcast message by assigned alias configured in masternode.conf\n"
                "  create-all    - Create remote masternode broadcast messages for all masternodes configured in masternode.conf\n"
                "  decode        - Decode masternode broadcast message\n"
                "  relay         - Relay masternode broadcast message to the network\n"
                );

    if (strCommand == "create-alias")
    {
        // wait for reindex and/or import to finish
        if (fImporting || fReindex)
            throw JSONRPCError(RPC_INTERNAL_ERROR, "Wait for reindex and/or import to finish");

        if (params.size() < 2)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Please specify an alias");

        {
            LOCK(pwalletMain->cs_wallet);
            EnsureWalletIsUnlocked();
        }

        bool fFound = false;
        std::string strAlias = params[1].get_str();

        UniValue statusObj(UniValue::VOBJ);
        std::vector<CMasternodeBroadcast> vecMnb;

        statusObj.push_back(Pair("alias", strAlias));

        BOOST_FOREACH(CMasternodeConfig::CMasternodeEntry mne, masternodeConfig.getEntries()) {
            if(mne.getAlias() == strAlias) {
                fFound = true;
                std::string strError;
                CMasternodeBroadcast mnb;

                bool fResult = CMasternodeBroadcast::Create(mne.getIp(), mne.getPrivKey(), mne.getTxHash(), mne.getOutputIndex(), strError, mnb, true);

                statusObj.push_back(Pair("result", fResult ? "successful" : "failed"));
                if(fResult) {
                    vecMnb.push_back(mnb);
                    CDataStream ssVecMnb(SER_NETWORK, PROTOCOL_VERSION);
                    ssVecMnb << vecMnb;
                    statusObj.push_back(Pair("hex", HexStr(ssVecMnb.begin(), ssVecMnb.end())));
                } else {
                    statusObj.push_back(Pair("errorMessage", strError));
                }
                break;
            }
        }

        if(!fFound) {
            statusObj.push_back(Pair("result", "not found"));
            statusObj.push_back(Pair("errorMessage", "Could not find alias in config. Verify with list-conf."));
        }

        return statusObj;

    }

    if (strCommand == "create-all")
    {
        // wait for reindex and/or import to finish
        if (fImporting || fReindex)
            throw JSONRPCError(RPC_INTERNAL_ERROR, "Wait for reindex and/or import to finish");

        {
            LOCK(pwalletMain->cs_wallet);
            EnsureWalletIsUnlocked();
        }

        std::vector<CMasternodeConfig::CMasternodeEntry> mnEntries;
        mnEntries = masternodeConfig.getEntries();

        int nSuccessful = 0;
        int nFailed = 0;

        UniValue resultsObj(UniValue::VOBJ);
        std::vector<CMasternodeBroadcast> vecMnb;

        BOOST_FOREACH(CMasternodeConfig::CMasternodeEntry mne, masternodeConfig.getEntries()) {
            std::string strError;
            CMasternodeBroadcast mnb;

            bool fResult = CMasternodeBroadcast::Create(mne.getIp(), mne.getPrivKey(), mne.getTxHash(), mne.getOutputIndex(), strError, mnb, true);

            UniValue statusObj(UniValue::VOBJ);
            statusObj.push_back(Pair("alias", mne.getAlias()));
            statusObj.push_back(Pair("result", fResult ? "successful" : "failed"));

            if(fResult) {
                nSuccessful++;
                vecMnb.push_back(mnb);
            } else {
                nFailed++;
                statusObj.push_back(Pair("errorMessage", strError));
            }

            resultsObj.push_back(Pair("status", statusObj));
        }

        CDataStream ssVecMnb(SER_NETWORK, PROTOCOL_VERSION);
        ssVecMnb << vecMnb;
        UniValue returnObj(UniValue::VOBJ);
        returnObj.push_back(Pair("overall", strprintf("Successfully created broadcast messages for %d masternodes, failed to create %d, total %d", nSuccessful, nFailed, nSuccessful + nFailed)));
        returnObj.push_back(Pair("detail", resultsObj));
        returnObj.push_back(Pair("hex", HexStr(ssVecMnb.begin(), ssVecMnb.end())));

        return returnObj;
    }

    if (strCommand == "decode")
    {
        if (params.size() != 2)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Correct usage is 'masternodebroadcast decode \"hexstring\"'");

        std::vector<CMasternodeBroadcast> vecMnb;

        if (!DecodeHexVecMnb(vecMnb, params[1].get_str()))
            throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Masternode broadcast message decode failed");

        int nSuccessful = 0;
        int nFailed = 0;
        int nDos = 0;
        UniValue returnObj(UniValue::VOBJ);

        BOOST_FOREACH(CMasternodeBroadcast& mnb, vecMnb) {
            UniValue resultObj(UniValue::VOBJ);

            if(mnb.CheckSignature(nDos)) {
                nSuccessful++;
                resultObj.push_back(Pair("outpoint", mnb.vin.prevout.ToStringShort()));
                resultObj.push_back(Pair("addr", mnb.addr.ToString()));
                resultObj.push_back(Pair("pubKeyCollateralAddress", CBitcoinAddress(mnb.pubKeyCollateralAddress.GetID()).ToString()));
                resultObj.push_back(Pair("pubKeyMasternode", CBitcoinAddress(mnb.pubKeyMasternode.GetID()).ToString()));
                resultObj.push_back(Pair("vchSig", EncodeBase64(&mnb.vchSig[0], mnb.vchSig.size())));
                resultObj.push_back(Pair("sigTime", mnb.sigTime));
                resultObj.push_back(Pair("protocolVersion", mnb.nProtocolVersion));
                resultObj.push_back(Pair("nLastDsq", mnb.nLastDsq));

                UniValue lastPingObj(UniValue::VOBJ);
                lastPingObj.push_back(Pair("outpoint", mnb.lastPing.vin.prevout.ToStringShort()));
                lastPingObj.push_back(Pair("blockHash", mnb.lastPing.blockHash.ToString()));
                lastPingObj.push_back(Pair("sigTime", mnb.lastPing.sigTime));
                lastPingObj.push_back(Pair("vchSig", EncodeBase64(&mnb.lastPing.vchSig[0], mnb.lastPing.vchSig.size())));

                resultObj.push_back(Pair("lastPing", lastPingObj));
            } else {
                nFailed++;
                resultObj.push_back(Pair("errorMessage", "Masternode broadcast signature verification failed"));
            }

            returnObj.push_back(Pair(mnb.GetHash().ToString(), resultObj));
        }

        returnObj.push_back(Pair("overall", strprintf("Successfully decoded broadcast messages for %d masternodes, failed to decode %d, total %d", nSuccessful, nFailed, nSuccessful + nFailed)));

        return returnObj;
    }

    if (strCommand == "relay")
    {
        if (params.size() < 2 || params.size() > 3)
            throw JSONRPCError(RPC_INVALID_PARAMETER,   "masternodebroadcast relay \"hexstring\" ( fast )\n"
                                                        "\nArguments:\n"
                                                        "1. \"hex\"      (string, required) Broadcast messages hex string\n"
                                                        "2. fast       (string, optional) If none, using safe method\n");

        std::vector<CMasternodeBroadcast> vecMnb;

        if (!DecodeHexVecMnb(vecMnb, params[1].get_str()))
            throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Masternode broadcast message decode failed");

        int nSuccessful = 0;
        int nFailed = 0;
        bool fSafe = params.size() == 2;
        UniValue returnObj(UniValue::VOBJ);

        // verify all signatures first, bailout if any of them broken
        BOOST_FOREACH(CMasternodeBroadcast& mnb, vecMnb) {
            UniValue resultObj(UniValue::VOBJ);

            resultObj.push_back(Pair("outpoint", mnb.vin.prevout.ToStringShort()));
            resultObj.push_back(Pair("addr", mnb.addr.ToString()));

            int nDos = 0;
            bool fResult;
            if (mnb.CheckSignature(nDos)) {
                if (fSafe) {
                    fResult = mnodeman.CheckMnbAndUpdateMasternodeList(NULL, mnb, nDos, *g_connman);
                } else {
                    mnodeman.UpdateMasternodeList(mnb, *g_connman);
                    mnb.Relay(*g_connman);
                    fResult = true;
                }
                mnodeman.NotifyMasternodeUpdates(*g_connman);
            } else fResult = false;

            if(fResult) {
                nSuccessful++;
                resultObj.push_back(Pair(mnb.GetHash().ToString(), "successful"));
            } else {
                nFailed++;
                resultObj.push_back(Pair("errorMessage", "Masternode broadcast signature verification failed"));
            }

            returnObj.push_back(Pair(mnb.GetHash().ToString(), resultObj));
        }

        returnObj.push_back(Pair("overall", strprintf("Successfully relayed broadcast messages for %d masternodes, failed to relay %d, total %d", nSuccessful, nFailed, nSuccessful + nFailed)));

        return returnObj;
    }

    return NullUniValue;
}

UniValue sentinelping(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1) {
        throw std::runtime_error(
            "sentinelping version\n"
            "\nSentinel ping.\n"
            "\nArguments:\n"
            "1. version           (string, required) Sentinel version in the form \"x.x.x\"\n"
            "\nResult:\n"
            "state                (boolean) Ping result\n"
            "\nExamples:\n"
            + HelpExampleCli("sentinelping", "1.0.2")
            + HelpExampleRpc("sentinelping", "1.0.2")
        );
    }

    activeMasternode.UpdateSentinelPing(StringVersionToInt(params[0].get_str()));
    return true;
}