// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Copyright (c) 2014-2015 The Dash developers
// Copyright (c) 2015-2019 The PIVX developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "base58.h"
#include "clientversion.h"
#include "init.h"
#include "main.h"
#include "masternode-sync.h"
#include "net.h"
#include "netbase.h"
#include "rpc/server.h"
#include "spork.h"
#include "timedata.h"
#include "util.h"
#ifdef ENABLE_WALLET
#include "wallet/wallet.h"
#include "wallet/walletdb.h"
#endif

#include <stdint.h>

#include <boost/assign/list_of.hpp>

#include <univalue.h>

using namespace boost;
using namespace boost::assign;
using namespace std;

/**
 * @note Do not add or change anything in the information returned by this
 * method. `getinfo` exists for backwards-compatibility only. It combines
 * information from wildly different sources in the program, which is a mess,
 * and is thus planned to be deprecated eventually.
 *
 * Based on the source of the information, new information should be added to:
 * - `getblockchaininfo`,
 * - `getnetworkinfo` or
 * - `getwalletinfo`
 *
 * Or alternatively, create a specific query method for the information.
 **/
UniValue getinfo(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getinfo\n"
            "\nReturns an object containing various state info.\n"

            "\nResult:\n"
            "{\n"
            "  \"version\": xxxxx,           (numeric) the server version\n"
            "  \"protocolversion\": xxxxx,   (numeric) the protocol version\n"
            "  \"walletversion\": xxxxx,     (numeric) the wallet version\n"
            "  \"balance\": xxxxxxx,         (numeric) the total agrarian balance of the wallet (excluding zerocoins)\n"
            "  \"zerocoinbalance\": xxxxxxx, (numeric) the total zerocoin balance of the wallet\n"
            "  \"blocks\": xxxxxx,           (numeric) the current number of blocks processed in the server\n"
            "  \"timeoffset\": xxxxx,        (numeric) the time offset\n"
            "  \"connections\": xxxxx,       (numeric) the number of connections\n"
            "  \"proxy\": \"host:port\",     (string, optional) the proxy used by the server\n"
            "  \"difficulty\": xxxxxx,       (numeric) the current difficulty\n"
            "  \"testnet\": true|false,      (boolean) if the server is using testnet or not\n"
            "  \"moneysupply\" : \"supply\"       (numeric) The money supply when this block was added to the blockchain\n"
            "  \"zAGRsupply\" :\n"
            "  {\n"
            "     \"1\" : n,            (numeric) supply of 1 zAGR denomination\n"
            "     \"5\" : n,            (numeric) supply of 5 zAGR denomination\n"
            "     \"10\" : n,           (numeric) supply of 10 zAGR denomination\n"
            "     \"50\" : n,           (numeric) supply of 50 zAGR denomination\n"
            "     \"100\" : n,          (numeric) supply of 100 zAGR denomination\n"
            "     \"500\" : n,          (numeric) supply of 500 zAGR denomination\n"
            "     \"1000\" : n,         (numeric) supply of 1000 zAGR denomination\n"
            "     \"5000\" : n,         (numeric) supply of 5000 zAGR denomination\n"
            "     \"total\" : n,        (numeric) The total supply of all zAGR denominations\n"
            "  }\n"
            "  \"keypoololdest\": xxxxxx,    (numeric) the timestamp (seconds since GMT epoch) of the oldest pre-generated key in the key pool\n"
            "  \"keypoolsize\": xxxx,        (numeric) how many new keys are pre-generated\n"
            "  \"unlocked_until\": ttt,      (numeric) the timestamp in seconds since epoch (midnight Jan 1 1970 GMT) that the wallet is unlocked for transfers, or 0 if the wallet is locked\n"
            "  \"paytxfee\": x.xxxx,         (numeric) the transaction fee set in agrarian/kb\n"
            "  \"relayfee\": x.xxxx,         (numeric) minimum relay fee for non-free transactions in agrarian/kb\n"
            "  \"staking status\": true|false,  (boolean) if the wallet is staking or not\n"
            "  \"errors\": \"...\"           (string) any error messages\n"
            "}\n"

            "\nExamples:\n" +
            HelpExampleCli("getinfo", "") + HelpExampleRpc("getinfo", ""));

#ifdef ENABLE_WALLET
    LOCK2(cs_main, pwalletMain ? &pwalletMain->cs_wallet : NULL);
#else
    LOCK(cs_main);
#endif

    std::string services;
    for (int i = 0; i < 8; i++) {
        uint64_t check = 1 << i;
        if (nLocalServices & check) {
            switch (check) {
                case NODE_NETWORK:
                    services+= "NETWORK/";
                    break;
                case NODE_BLOOM:
                    services+= "BLOOM/";
                    break;
                case NODE_BLOOM_WITHOUT_MN:
                case NODE_BLOOM_LIGHT_ZC:
                    services+= "BLOOM_ZC/";
                    break;
                default:
                    services+= "UNKNOWN/";
            }
        }
    }

    proxyType proxy;
    GetProxy(NET_IPV4, proxy);

    UniValue obj(UniValue::VOBJ);
    obj.push_back(Pair("version", CLIENT_VERSION));
    obj.push_back(Pair("protocolversion", PROTOCOL_VERSION));
    obj.push_back(Pair("services", services));
#ifdef ENABLE_WALLET
    if (pwalletMain) {
        obj.push_back(Pair("walletversion", pwalletMain->GetVersion()));
        obj.push_back(Pair("balance", ValueFromAmount(pwalletMain->GetBalance())));
        obj.push_back(Pair("zerocoinbalance", ValueFromAmount(pwalletMain->GetZerocoinBalance(true))));
    }
#endif
    obj.push_back(Pair("blocks", (int)chainActive.Height()));
    obj.push_back(Pair("timeoffset", GetTimeOffset()));
    obj.push_back(Pair("connections", (int)vNodes.size()));
    obj.push_back(Pair("proxy", (proxy.IsValid() ? proxy.proxy.ToStringIPPort() : string())));
    obj.push_back(Pair("difficulty", (double)GetDifficulty()));
    obj.push_back(Pair("testnet", Params().TestnetToBeDeprecatedFieldRPC()));

    // During inital block verification chainActive.Tip() might be not yet initialized
    if (chainActive.Tip() == NULL) {
        obj.push_back(Pair("status", "Blockchain information not yet available"));
        return obj;
    }

    obj.push_back(Pair("moneysupply",ValueFromAmount(chainActive.Tip()->nMoneySupply)));
    UniValue zagrObj(UniValue::VOBJ);
    for (auto denom : libzerocoin::zerocoinDenomList) {
        zagrObj.push_back(Pair(to_string(denom), ValueFromAmount(chainActive.Tip()->mapZerocoinSupply.at(denom) * (denom*COIN))));
    }
    zagrObj.push_back(Pair("total", ValueFromAmount(chainActive.Tip()->GetZerocoinSupply())));
    obj.push_back(Pair("zAGRsupply", zagrObj));

#ifdef ENABLE_WALLET
    if (pwalletMain) {
        obj.push_back(Pair("keypoololdest", pwalletMain->GetOldestKeyPoolTime()));
        obj.push_back(Pair("keypoolsize", (int)pwalletMain->GetKeyPoolSize()));
    }
    if (pwalletMain && pwalletMain->IsCrypted())
        obj.push_back(Pair("unlocked_until", nWalletUnlockTime));
    obj.push_back(Pair("paytxfee", ValueFromAmount(payTxFee.GetFeePerK())));
#endif
    obj.push_back(Pair("relayfee", ValueFromAmount(::minRelayTxFee.GetFeePerK())));
    bool nStaking = false;
    if (mapHashedBlocks.count(chainActive.Tip()->nHeight))
        nStaking = true;
    else if (mapHashedBlocks.count(chainActive.Tip()->nHeight - 1) && nLastCoinStakeSearchInterval)
        nStaking = true;
    obj.push_back(Pair("staking status", (nStaking ? "Staking Active" : "Staking Not Active")));
    obj.push_back(Pair("errors", GetWarnings("statusbar")));
    return obj;
}

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

    if (fHelp || params.size() != 1 || (strMode != "status" && strMode != "reset")) {
        throw runtime_error(
            "mnsync \"status|reset\"\n"
            "\nReturns the sync status or resets sync.\n"

            "\nArguments:\n"
            "1. \"mode\"    (string, required) either 'status' or 'reset'\n"

            "\nResult ('status' mode):\n"
            "{\n"
            "  \"IsBlockchainSynced\": true|false,    (boolean) 'true' if blockchain is synced\n"
            "  \"lastMasternodeList\": xxxx,        (numeric) Timestamp of last MN list message\n"
            "  \"lastMasternodeWinner\": xxxx,      (numeric) Timestamp of last MN winner message\n"
            "  \"lastBudgetItem\": xxxx,            (numeric) Timestamp of last MN budget message\n"
            "  \"lastFailure\": xxxx,           (numeric) Timestamp of last failed sync\n"
            "  \"nCountFailures\": n,           (numeric) Number of failed syncs (total)\n"
            "  \"sumMasternodeList\": n,        (numeric) Number of MN list messages (total)\n"
            "  \"sumMasternodeWinner\": n,      (numeric) Number of MN winner messages (total)\n"
            "  \"sumBudgetItemProp\": n,        (numeric) Number of MN budget messages (total)\n"
            "  \"sumBudgetItemFin\": n,         (numeric) Number of MN budget finalization messages (total)\n"
            "  \"countMasternodeList\": n,      (numeric) Number of MN list messages (local)\n"
            "  \"countMasternodeWinner\": n,    (numeric) Number of MN winner messages (local)\n"
            "  \"countBudgetItemProp\": n,      (numeric) Number of MN budget messages (local)\n"
            "  \"countBudgetItemFin\": n,       (numeric) Number of MN budget finalization messages (local)\n"
            "  \"RequestedMasternodeAssets\": n, (numeric) Status code of last sync phase\n"
            "  \"RequestedMasternodeAttempt\": n, (numeric) Status code of last sync attempt\n"
            "}\n"

            "\nResult ('reset' mode):\n"
            "\"status\"     (string) 'success'\n"

            "\nExamples:\n" +
            HelpExampleCli("mnsync", "\"status\"") + HelpExampleRpc("mnsync", "\"status\""));
    }

    if (strMode == "status") {
        UniValue obj(UniValue::VOBJ);

        obj.push_back(Pair("IsBlockchainSynced", masternodeSync.IsBlockchainSynced()));
        obj.push_back(Pair("lastMasternodeList", masternodeSync.lastMasternodeList));
        obj.push_back(Pair("lastMasternodeWinner", masternodeSync.lastMasternodeWinner));
        obj.push_back(Pair("lastBudgetItem", masternodeSync.lastBudgetItem));
        obj.push_back(Pair("lastFailure", masternodeSync.lastFailure));
        obj.push_back(Pair("nCountFailures", masternodeSync.nCountFailures));
        obj.push_back(Pair("sumMasternodeList", masternodeSync.sumMasternodeList));
        obj.push_back(Pair("sumMasternodeWinner", masternodeSync.sumMasternodeWinner));
        obj.push_back(Pair("sumBudgetItemProp", masternodeSync.sumBudgetItemProp));
        obj.push_back(Pair("sumBudgetItemFin", masternodeSync.sumBudgetItemFin));
        obj.push_back(Pair("countMasternodeList", masternodeSync.countMasternodeList));
        obj.push_back(Pair("countMasternodeWinner", masternodeSync.countMasternodeWinner));
        obj.push_back(Pair("countBudgetItemProp", masternodeSync.countBudgetItemProp));
        obj.push_back(Pair("countBudgetItemFin", masternodeSync.countBudgetItemFin));
        obj.push_back(Pair("RequestedMasternodeAssets", masternodeSync.RequestedMasternodeAssets));
        obj.push_back(Pair("RequestedMasternodeAttempt", masternodeSync.RequestedMasternodeAttempt));

        return obj;
    }

    if (strMode == "reset") {
        masternodeSync.Reset();
        return "success";
    }
    return "failure";
}

#ifdef ENABLE_WALLET
class DescribeAddressVisitor : public boost::static_visitor<UniValue>
{
private:
    isminetype mine;

public:
    DescribeAddressVisitor(isminetype mineIn) : mine(mineIn) {}

    UniValue operator()(const CNoDestination &dest) const { return UniValue(UniValue::VOBJ); }

    UniValue operator()(const CKeyID &keyID) const {
        UniValue obj(UniValue::VOBJ);
        CPubKey vchPubKey;
        obj.push_back(Pair("isscript", false));
        if (mine == ISMINE_SPENDABLE) {
            pwalletMain->GetPubKey(keyID, vchPubKey);
            obj.push_back(Pair("pubkey", HexStr(vchPubKey)));
            obj.push_back(Pair("iscompressed", vchPubKey.IsCompressed()));
        }
        return obj;
    }

    UniValue operator()(const CScriptID &scriptID) const {
        UniValue obj(UniValue::VOBJ);
        obj.push_back(Pair("isscript", true));
        CScript subscript;
        pwalletMain->GetCScript(scriptID, subscript);
        std::vector<CTxDestination> addresses;
        txnouttype whichType;
        int nRequired;
        ExtractDestinations(subscript, whichType, addresses, nRequired);
        obj.push_back(Pair("script", GetTxnOutputType(whichType)));
        obj.push_back(Pair("hex", HexStr(subscript.begin(), subscript.end())));
        UniValue a(UniValue::VARR);
        for (const CTxDestination& addr : addresses)
            a.push_back(CBitcoinAddress(addr).ToString());
        obj.push_back(Pair("addresses", a));
        if (whichType == TX_MULTISIG)
            obj.push_back(Pair("sigsrequired", nRequired));
        return obj;
    }
};
#endif

/*
    Used for updating/reading spork settings on the network
*/
UniValue spork(const UniValue& params, bool fHelp)
{
    if (params.size() == 1 && params[0].get_str() == "show") {
        UniValue ret(UniValue::VOBJ);
        for (int nSporkID = SPORK_START; nSporkID <= SPORK_END; nSporkID++) {
            if (sporkManager.GetSporkNameByID(nSporkID) != "Unknown")
                ret.push_back(Pair(sporkManager.GetSporkNameByID(nSporkID), GetSporkValue(nSporkID)));
        }
        return ret;
    } else if (params.size() == 1 && params[0].get_str() == "active") {
        UniValue ret(UniValue::VOBJ);
        for (int nSporkID = SPORK_START; nSporkID <= SPORK_END; nSporkID++) {
            if (sporkManager.GetSporkNameByID(nSporkID) != "Unknown")
                ret.push_back(Pair(sporkManager.GetSporkNameByID(nSporkID), IsSporkActive(nSporkID)));
        }
        return ret;
    } else if (params.size() == 2) {
        int nSporkID = sporkManager.GetSporkIDByName(params[0].get_str());
        if (nSporkID == -1) {
            return "Invalid spork name";
        }

        // SPORK VALUE
        int64_t nValue = params[1].get_int64();

        //broadcast new spork
        if (sporkManager.UpdateSpork(nSporkID, nValue)) {
            return "success";
        } else {
            return "failure";
        }
    }

    throw runtime_error(
        "spork \"name\" ( value )\n"
        "\nReturn spork values or their active state.\n"

        "\nArguments:\n"
        "1. \"name\"        (string, required)  \"show\" to show values, \"active\" to show active state.\n"
        "                       When set up as a spork signer, the name of the spork can be used to update it's value.\n"
        "2. value           (numeric, required when updating a spork) The new value for the spork.\n"

        "\nResult (show):\n"
        "{\n"
        "  \"spork_name\": nnn      (key/value) Key is the spork name, value is it's current value.\n"
        "  ,...\n"
        "}\n"

        "\nResult (active):\n"
        "{\n"
        "  \"spork_name\": true|false      (key/value) Key is the spork name, value is a boolean for it's active state.\n"
        "  ,...\n"
        "}\n"

        "\nResult (name):\n"
        " \"success|failure\"       (string) Wither or not the update succeeded.\n"

        "\nExamples:\n" +
        HelpExampleCli("spork", "show") + HelpExampleRpc("spork", "show"));
}

UniValue validateaddress(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "validateaddress \"agrarianaddress\"\n"
            "\nReturn information about the given agrarian address.\n"

            "\nArguments:\n"
            "1. \"agrarianaddress\"     (string, required) The agrarian address to validate\n"

            "\nResult:\n"
            "{\n"
            "  \"isvalid\" : true|false,         (boolean) If the address is valid or not. If not, this is the only property returned.\n"
            "  \"address\" : \"agrarianaddress\", (string) The agrarian address validated\n"
            "  \"scriptPubKey\" : \"hex\",       (string) The hex encoded scriptPubKey generated by the address\n"
            "  \"ismine\" : true|false,          (boolean) If the address is yours or not\n"
            "  \"iswatchonly\" : true|false,   (boolean) If the address is watchonly\n"
            "  \"isscript\" : true|false,        (boolean) If the key is a script\n"
            "  \"hex\" : \"hex\",                (string, optional) The redeemscript for the P2SH address\n"
            "  \"pubkey\" : \"publickeyhex\",    (string) The hex value of the raw public key\n"
            "  \"iscompressed\" : true|false,    (boolean) If the address is compressed\n"
            "  \"account\" : \"account\"         (string) The account associated with the address, \"\" is the default account\n"
            "}\n"

            "\nExamples:\n" +
            HelpExampleCli("validateaddress", "\"1PSSGeFHDnKNxiEyFrD1wcEaHr9hrQDDWc\"") + HelpExampleRpc("validateaddress", "\"1PSSGeFHDnKNxiEyFrD1wcEaHr9hrQDDWc\""));

#ifdef ENABLE_WALLET
    LOCK2(cs_main, pwalletMain ? &pwalletMain->cs_wallet : NULL);
#else
    LOCK(cs_main);
#endif

    CBitcoinAddress address(params[0].get_str());
    bool isValid = address.IsValid();

    UniValue ret(UniValue::VOBJ);
    ret.push_back(Pair("isvalid", isValid));
    if (isValid) {
        CTxDestination dest = address.Get();
        string currentAddress = address.ToString();
        ret.push_back(Pair("address", currentAddress));
        CScript scriptPubKey = GetScriptForDestination(dest);
        ret.push_back(Pair("scriptPubKey", HexStr(scriptPubKey.begin(), scriptPubKey.end())));

#ifdef ENABLE_WALLET
        isminetype mine = pwalletMain ? IsMine(*pwalletMain, dest) : ISMINE_NO;
        ret.push_back(Pair("ismine", bool(mine & ISMINE_SPENDABLE)));
        ret.push_back(Pair("iswatchonly", bool(mine & ISMINE_WATCH_ONLY)));
        UniValue detail = boost::apply_visitor(DescribeAddressVisitor(mine), dest);
        ret.pushKVs(detail);
        if (pwalletMain && pwalletMain->mapAddressBook.count(dest))
            ret.push_back(Pair("account", pwalletMain->mapAddressBook[dest].name));
#endif
    }
    return ret;
}

/**
 * Used by addmultisigaddress / createmultisig:
 */
CScript _createmultisig_redeemScript(const UniValue& params)
{
    int nRequired = params[0].get_int();
    const UniValue& keys = params[1].get_array();

    // Gather public keys
    if (nRequired < 1)
        throw runtime_error("a multisignature address must require at least one key to redeem");
    if ((int)keys.size() < nRequired)
        throw runtime_error(
            strprintf("not enough keys supplied "
                      "(got %u keys, but need at least %d to redeem)",
                keys.size(), nRequired));
    if (keys.size() > 16)
        throw runtime_error("Number of addresses involved in the multisignature address creation > 16\nReduce the number");
    std::vector<CPubKey> pubkeys;
    pubkeys.resize(keys.size());
    for (unsigned int i = 0; i < keys.size(); i++) {
        const std::string& ks = keys[i].get_str();
#ifdef ENABLE_WALLET
        // Case 1: Agrarian address and we have full public key:
        CBitcoinAddress address(ks);
        if (pwalletMain && address.IsValid()) {
            CKeyID keyID;
            if (!address.GetKeyID(keyID))
                throw runtime_error(
                    strprintf("%s does not refer to a key", ks));
            CPubKey vchPubKey;
            if (!pwalletMain->GetPubKey(keyID, vchPubKey))
                throw runtime_error(
                    strprintf("no full public key for address %s", ks));
            if (!vchPubKey.IsFullyValid())
                throw runtime_error(" Invalid public key: " + ks);
            pubkeys[i] = vchPubKey;
        }

        // Case 2: hex public key
        else
#endif
            if (IsHex(ks)) {
            CPubKey vchPubKey(ParseHex(ks));
            if (!vchPubKey.IsFullyValid())
                throw runtime_error(" Invalid public key: " + ks);
            pubkeys[i] = vchPubKey;
        } else {
            throw runtime_error(" Invalid public key: " + ks);
        }
    }
    CScript result = GetScriptForMultisig(nRequired, pubkeys);

    if (result.size() > MAX_SCRIPT_ELEMENT_SIZE)
        throw runtime_error(
            strprintf("redeemScript exceeds size limit: %d > %d", result.size(), MAX_SCRIPT_ELEMENT_SIZE));

    return result;
}

UniValue createmultisig(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 2 || params.size() > 2)
        throw runtime_error(
            "createmultisig nrequired [\"key\",...]\n"
            "\nCreates a multi-signature address with n signature of m keys required.\n"
            "It returns a json object with the address and redeemScript.\n"

            "\nArguments:\n"
            "1. nrequired      (numeric, required) The number of required signatures out of the n keys or addresses.\n"
            "2. \"keys\"       (string, required) A json array of keys which are agrarian addresses or hex-encoded public keys\n"
            "     [\n"
            "       \"key\"    (string) agrarian address or hex-encoded public key\n"
            "       ,...\n"
            "     ]\n"

            "\nResult:\n"
            "{\n"
            "  \"address\":\"multisigaddress\",  (string) The value of the new multisig address.\n"
            "  \"redeemScript\":\"script\"       (string) The string value of the hex-encoded redemption script.\n"
            "}\n"

            "\nExamples:\n"
            "\nCreate a multisig address from 2 addresses\n" +
            HelpExampleCli("createmultisig", "2 \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"") +
            "\nAs a json rpc call\n" +
            HelpExampleRpc("createmultisig", "2, \"[\\\"16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\""));

    // Construct using pay-to-script-hash:
    CScript inner = _createmultisig_redeemScript(params);
    CScriptID innerID(inner);
    CBitcoinAddress address(innerID);

    UniValue result(UniValue::VOBJ);
    result.push_back(Pair("address", address.ToString()));
    result.push_back(Pair("redeemScript", HexStr(inner.begin(), inner.end())));

    return result;
}

UniValue verifymessage(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 3)
        throw runtime_error(
            "verifymessage \"agrarianaddress\" \"signature\" \"message\"\n"
            "\nVerify a signed message\n"

            "\nArguments:\n"
            "1. \"agrarianaddress\"  (string, required) The agrarian address to use for the signature.\n"
            "2. \"signature\"       (string, required) The signature provided by the signer in base 64 encoding (see signmessage).\n"
            "3. \"message\"         (string, required) The message that was signed.\n"

            "\nResult:\n"
            "true|false   (boolean) If the signature is verified or not.\n"

            "\nExamples:\n"
            "\nUnlock the wallet for 30 seconds\n" +
            HelpExampleCli("walletpassphrase", "\"mypassphrase\" 30") +
            "\nCreate the signature\n" +
            HelpExampleCli("signmessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XZ\" \"my message\"") +
            "\nVerify the signature\n" +
            HelpExampleCli("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XZ\" \"signature\" \"my message\"") +
            "\nAs json rpc\n" +
            HelpExampleRpc("verifymessage", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XZ\", \"signature\", \"my message\""));

    LOCK(cs_main);

    string strAddress = params[0].get_str();
    string strSign = params[1].get_str();
    string strMessage = params[2].get_str();

    CBitcoinAddress addr(strAddress);
    if (!addr.IsValid())
        throw JSONRPCError(RPC_TYPE_ERROR, "Invalid address");

    CKeyID keyID;
    if (!addr.GetKeyID(keyID))
        throw JSONRPCError(RPC_TYPE_ERROR, "Address does not refer to key");

    bool fInvalid = false;
    vector<unsigned char> vchSig = DecodeBase64(strSign.c_str(), &fInvalid);

    if (fInvalid)
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Malformed base64 encoding");

    CHashWriter ss(SER_GETHASH, 0);
    ss << strMessageMagic;
    ss << strMessage;

    CPubKey pubkey;
    if (!pubkey.RecoverCompact(ss.GetHash(), vchSig))
        return false;

    return (pubkey.GetID() == keyID);
}

UniValue setmocktime(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "setmocktime timestamp\n"
            "\nSet the local time to given timestamp (-regtest only)\n"

            "\nArguments:\n"
            "1. timestamp  (integer, required) Unix seconds-since-epoch timestamp\n"
            "   Pass 0 to go back to using the system time.");

    if (!Params().MineBlocksOnDemand())
        throw runtime_error("setmocktime for regression testing (-regtest mode) only");

    LOCK(cs_main);

    RPCTypeCheck(params, boost::assign::list_of(UniValue::VNUM));
    SetMockTime(params[0].get_int64());

    return NullUniValue;
}

#ifdef ENABLE_WALLET
UniValue getstakingstatus(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getstakingstatus\n"
            "\nReturns an object containing various staking information.\n"

            "\nResult:\n"
            "{\n"
            "  \"validtime\": true|false,          (boolean) if the chain tip is within staking phases\n"
            "  \"haveconnections\": true|false,    (boolean) if network connections are present\n"
            "  \"walletunlocked\": true|false,     (boolean) if the wallet is unlocked\n"
            "  \"mintablecoins\": true|false,      (boolean) if the wallet has mintable coins\n"
            "  \"enoughcoins\": true|false,        (boolean) if available coins are greater than reserve balance\n"
            "  \"mnsync\": true|false,             (boolean) if masternode data is synced\n"
            "  \"staking status\": true|false,     (boolean) if the wallet is staking or not\n"
            "}\n"

            "\nExamples:\n" +
            HelpExampleCli("getstakingstatus", "") + HelpExampleRpc("getstakingstatus", ""));

#ifdef ENABLE_WALLET
    LOCK2(cs_main, pwalletMain ? &pwalletMain->cs_wallet : NULL);
#else
    LOCK(cs_main);
#endif

    UniValue obj(UniValue::VOBJ);
    obj.push_back(Pair("validtime", chainActive.Tip()->nTime > 1471482000));
    obj.push_back(Pair("haveconnections", !vNodes.empty()));
    if (pwalletMain) {
        obj.push_back(Pair("walletunlocked", !pwalletMain->IsLocked()));
        obj.push_back(Pair("mintablecoins", pwalletMain->MintableCoins()));
        obj.push_back(Pair("enoughcoins", nReserveBalance <= pwalletMain->GetBalance()));
    }
    obj.push_back(Pair("mnsync", masternodeSync.IsSynced()));

    bool nStaking = false;
    if (mapHashedBlocks.count(chainActive.Tip()->nHeight))
        nStaking = true;
    else if (mapHashedBlocks.count(chainActive.Tip()->nHeight - 1) && nLastCoinStakeSearchInterval)
        nStaking = true;
    obj.push_back(Pair("staking status", nStaking));

    return obj;
}
#endif // ENABLE_WALLET
