hush/src/rpcmisc.cpp

// Copyright (c) 2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin Core 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 "net.h"
#include "netbase.h"
#include "rpcserver.h"
#include "timedata.h"
#include "txmempool.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>

#include "zcash/Address.hpp"

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"
            "Returns 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 Hush 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"
            "  \"tls_connections\": xxxxx,   (numeric) the number of TLS 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"
            "  \"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 " + CURRENCY_UNIT + "/kB\n"
            "  \"relayfee\": x.xxxx,         (numeric) minimum relay fee for non-free transactions in " + CURRENCY_UNIT + "/kB\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

    proxyType proxy;
    GetProxy(NET_IPV4, proxy);

    UniValue obj(UniValue::VOBJ);
    obj.push_back(Pair("version", CLIENT_VERSION));
    obj.push_back(Pair("protocolversion", PROTOCOL_VERSION));
#ifdef ENABLE_WALLET
    if (pwalletMain) {
        obj.push_back(Pair("walletversion", pwalletMain->GetVersion()));
        obj.push_back(Pair("balance",       ValueFromAmount(pwalletMain->GetBalance())));
    }
#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("tls_connections", (int)std::count_if(vNodes.begin(), vNodes.end(), [](CNode* n) {return n->ssl != NULL;})));
    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()));
#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())));
    obj.push_back(Pair("errors",        GetWarnings("statusbar")));
    return obj;
}

#ifdef ENABLE_WALLET
class DescribeAddressVisitor : public boost::static_visitor<UniValue>
{
public:
    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 (pwalletMain && 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);
        CScript subscript;
        obj.push_back(Pair("isscript", true));
        if (pwalletMain && 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);
            BOOST_FOREACH(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

UniValue validateaddress(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "validateaddress \"hushaddress\"\n"
            "\nReturn information about the given Hush address.\n"
            "\nArguments:\n"
            "1. \"hushaddress\"     (string, required) The Hush 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\" : \"hushaddress\",   (string) The Hush 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 a watchonly address\n"
            "  \"isscript\" : true|false,        (boolean) If the key is a script\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) DEPRECATED. 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", (mine & ISMINE_SPENDABLE) ? true : false));
        ret.push_back(Pair("iswatchonly", (mine & ISMINE_WATCH_ONLY) ? true: false));
        UniValue detail = boost::apply_visitor(DescribeAddressVisitor(), dest);
        ret.pushKVs(detail);
        if (pwalletMain && pwalletMain->mapAddressBook.count(dest))
            ret.push_back(Pair("account", pwalletMain->mapAddressBook[dest].name));
#endif
    }
    return ret;
}


UniValue z_validateaddress(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "z_validateaddress \"zaddr\"\n"
            "\nReturn information about the given z address.\n"
            "\nArguments:\n"
            "1. \"zaddr\"     (string, required) The z 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\" : \"zaddr\",         (string) The z address validated\n"
            "  \"ismine\" : true|false,       (boolean) If the address is yours or not\n"
            "  \"payingkey\" : \"hex\",         (string) The hex value of the paying key, a_pk\n"
            "  \"transmissionkey\" : \"hex\",   (string) The hex value of the transmission key, pk_enc\n"

            "}\n"
            "\nExamples:\n"
            + HelpExampleCli("validateaddress", "\"zcWsmqT4X2V4jgxbgiCzyrAfRT1vi1F4sn7M5Pkh66izzw8Uk7LBGAH3DtcSMJeUb2pi3W4SQF8LMKkU2cUuVP68yAGcomL\"")
        );


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

    bool isValid = false;
    bool isMine = false;
    std::string payingKey, transmissionKey;

    string strAddress = params[0].get_str();
    try {
        CZCPaymentAddress address(strAddress);
        libzcash::PaymentAddress addr = address.Get();

#ifdef ENABLE_WALLET
        isMine = pwalletMain->HaveSpendingKey(addr);
#endif
        payingKey = addr.a_pk.GetHex();
        transmissionKey = addr.pk_enc.GetHex();
        isValid = true;
    } catch (std::runtime_error e) {
        // address is invalid, nop here as isValid is false.
    }

    UniValue ret(UniValue::VOBJ);
    ret.push_back(Pair("isvalid", isValid));
    if (isValid)
    {
        ret.push_back(Pair("address", strAddress));
        ret.push_back(Pair("payingkey", payingKey));
        ret.push_back(Pair("transmissionkey", transmissionKey));
#ifdef ENABLE_WALLET
        ret.push_back(Pair("ismine", isMine));
#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: Bitcoin 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)
    {
        string msg = "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 Hush addresses or hex-encoded public keys\n"
            "     [\n"
            "       \"key\"    (string) Hush 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 \"[\\\"t16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"t171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"") +
            "\nAs a json rpc call\n"
            + HelpExampleRpc("createmultisig", "2, \"[\\\"t16sSauSf5pF2UkUwvKGq4qjNRzBZYqgEL5\\\",\\\"t171sgjn4YtPu27adkKGrdDwzRTxnRkBfKV\\\"]\"")
        ;
        throw runtime_error(msg);
    }

    // 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 \"hushaddress\" \"signature\" \"message\"\n"
            "\nVerify a signed message\n"
            "\nArguments:\n"
            "1. \"hushaddress\"    (string, required) The Hush 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", "\"t14oHp2v54vfmdgQ3v3SNuQga8JKHTNi2a1\" \"my message\"") +
            "\nVerify the signature\n"
            + HelpExampleCli("verifymessage", "\"t14oHp2v54vfmdgQ3v3SNuQga8JKHTNi2a1\" \"signature\" \"my message\"") +
            "\nAs json rpc\n"
            + HelpExampleRpc("verifymessage", "\"t14oHp2v54vfmdgQ3v3SNuQga8JKHTNi2a1\", \"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");

    // cs_vNodes is locked and node send/receive times are updated
    // atomically with the time change to prevent peers from being
    // disconnected because we think we haven't communicated with them
    // in a long time.
    LOCK2(cs_main, cs_vNodes);

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

    uint64_t t = GetTime();
    BOOST_FOREACH(CNode* pnode, vNodes) {
        pnode->nLastSend = pnode->nLastRecv = t;
    }

    return NullUniValue;
}

bool getAddressFromIndex(const int &type, const uint160 &hash, std::string &address)
{
    if (type == 2) {
        address = CBitcoinAddress(CScriptID(hash)).ToString();
    } else if (type == 1) {
        address = CBitcoinAddress(CKeyID(hash)).ToString();
    } else {
        return false;
    }
    return true;
}

bool getAddressesFromParams(const UniValue& params, std::vector<std::pair<uint160, int> > &addresses)
{
    if (params[0].isStr()) {
        CBitcoinAddress address(params[0].get_str());
        uint160 hashBytes;
        int type = 0;
        if (!address.GetIndexKey(hashBytes, type)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
        }
        addresses.push_back(std::make_pair(hashBytes, type));
    } else if (params[0].isObject()) {

        UniValue addressValues = find_value(params[0].get_obj(), "addresses");
        if (!addressValues.isArray()) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Addresses is expected to be an array");
        }

        std::vector<UniValue> values = addressValues.getValues();

        for (std::vector<UniValue>::iterator it = values.begin(); it != values.end(); ++it) {

            CBitcoinAddress address(it->get_str());
            uint160 hashBytes;
            int type = 0;
            if (!address.GetIndexKey(hashBytes, type)) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
            }
            addresses.push_back(std::make_pair(hashBytes, type));
        }
    } else {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
    }

    return true;
}

bool heightSort(std::pair<CAddressUnspentKey, CAddressUnspentValue> a,
                std::pair<CAddressUnspentKey, CAddressUnspentValue> b) {
    return a.second.blockHeight < b.second.blockHeight;
}

bool timestampSort(std::pair<CMempoolAddressDeltaKey, CMempoolAddressDelta> a,
                   std::pair<CMempoolAddressDeltaKey, CMempoolAddressDelta> b) {
    return a.second.time < b.second.time;
}

UniValue getaddressmempool(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "getaddressmempool\n"
            "\nReturns all mempool deltas for an address (requires addressindex to be enabled).\n"
            "\nArguments:\n"
            "{\n"
            "  \"addresses\"\n"
            "    [\n"
            "      \"address\"  (string) The base58check encoded address\n"
            "      ,...\n"
            "    ]\n"
            "}\n"
            "\nResult:\n"
            "[\n"
            "  {\n"
            "    \"address\"  (string) The base58check encoded address\n"
            "    \"txid\"  (string) The related txid\n"
            "    \"index\"  (number) The related input or output index\n"
            "    \"satoshis\"  (number) The difference of satoshis\n"
            "    \"timestamp\"  (number) The time the transaction entered the mempool (seconds)\n"
            "    \"prevtxid\"  (string) The previous txid (if spending)\n"
            "    \"prevout\"  (string) The previous transaction output index (if spending)\n"
            "  }\n"
            "]\n"
            "\nExamples:\n"
            + HelpExampleCli("getaddressmempool", "'{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}'")
            + HelpExampleRpc("getaddressmempool", "{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}")
        );

    std::vector<std::pair<uint160, int> > addresses;

    if (!getAddressesFromParams(params, addresses)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
    }

    std::vector<std::pair<CMempoolAddressDeltaKey, CMempoolAddressDelta> > indexes;

    if (!mempool.getAddressIndex(addresses, indexes)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
    }

    std::sort(indexes.begin(), indexes.end(), timestampSort);

    UniValue result(UniValue::VARR);

    for (std::vector<std::pair<CMempoolAddressDeltaKey, CMempoolAddressDelta> >::iterator it = indexes.begin();
         it != indexes.end(); it++) {

        std::string address;
        if (!getAddressFromIndex(it->first.type, it->first.addressBytes, address)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unknown address type");
        }

        UniValue delta(UniValue::VOBJ);
        delta.push_back(Pair("address", address));
        delta.push_back(Pair("txid", it->first.txhash.GetHex()));
        delta.push_back(Pair("index", (int)it->first.index));
        delta.push_back(Pair("satoshis", it->second.amount));
        delta.push_back(Pair("timestamp", it->second.time));
        if (it->second.amount < 0) {
            delta.push_back(Pair("prevtxid", it->second.prevhash.GetHex()));
            delta.push_back(Pair("prevout", (int)it->second.prevout));
        }
        result.push_back(delta);
    }

    return result;
}

UniValue getaddressutxos(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "getaddressutxos\n"
            "\nReturns all unspent outputs for an address (requires addressindex to be enabled).\n"
            "\nArguments:\n"
            "{\n"
            "  \"addresses\"\n"
            "    [\n"
            "      \"address\"  (string) The base58check encoded address\n"
            "      ,...\n"
            "    ],\n"
            "  \"chainInfo\"  (boolean) Include chain info with results\n"
            "}\n"
            "\nResult\n"
            "[\n"
            "  {\n"
            "    \"address\"  (string) The address base58check encoded\n"
            "    \"txid\"  (string) The output txid\n"
            "    \"height\"  (number) The block height\n"
            "    \"outputIndex\"  (number) The output index\n"
            "    \"script\"  (strin) The script hex encoded\n"
            "    \"satoshis\"  (number) The number of satoshis of the output\n"
            "  }\n"
            "]\n"
            "\nExamples:\n"
            + HelpExampleCli("getaddressutxos", "'{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}'")
            + HelpExampleRpc("getaddressutxos", "{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}")
            );

    bool includeChainInfo = false;
    if (params[0].isObject()) {
        UniValue chainInfo = find_value(params[0].get_obj(), "chainInfo");
        if (chainInfo.isBool()) {
            includeChainInfo = chainInfo.get_bool();
        }
    }

    std::vector<std::pair<uint160, int> > addresses;

    if (!getAddressesFromParams(params, addresses)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
    }

    std::vector<std::pair<CAddressUnspentKey, CAddressUnspentValue> > unspentOutputs;

    for (std::vector<std::pair<uint160, int> >::iterator it = addresses.begin(); it != addresses.end(); it++) {
        if (!GetAddressUnspent((*it).first, (*it).second, unspentOutputs)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
        }
    }

    std::sort(unspentOutputs.begin(), unspentOutputs.end(), heightSort);

    UniValue utxos(UniValue::VARR);

    for (std::vector<std::pair<CAddressUnspentKey, CAddressUnspentValue> >::const_iterator it=unspentOutputs.begin(); it!=unspentOutputs.end(); it++) {
        UniValue output(UniValue::VOBJ);
        std::string address;
        if (!getAddressFromIndex(it->first.type, it->first.hashBytes, address)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unknown address type");
        }

        output.push_back(Pair("address", address));
        output.push_back(Pair("txid", it->first.txhash.GetHex()));
        output.push_back(Pair("outputIndex", (int)it->first.index));
        output.push_back(Pair("script", HexStr(it->second.script.begin(), it->second.script.end())));
        output.push_back(Pair("satoshis", it->second.satoshis));
        output.push_back(Pair("height", it->second.blockHeight));
        utxos.push_back(output);
    }

    if (includeChainInfo) {
        UniValue result(UniValue::VOBJ);
        result.push_back(Pair("utxos", utxos));

        LOCK(cs_main);
        result.push_back(Pair("hash", chainActive.Tip()->GetBlockHash().GetHex()));
        result.push_back(Pair("height", (int)chainActive.Height()));
        return result;
    } else {
        return utxos;
    }
}

UniValue getaddressdeltas(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1 || !params[0].isObject())
        throw runtime_error(
            "getaddressdeltas\n"
            "\nReturns all changes for an address (requires addressindex to be enabled).\n"
            "\nArguments:\n"
            "{\n"
            "  \"addresses\"\n"
            "    [\n"
            "      \"address\"  (string) The base58check encoded address\n"
            "      ,...\n"
            "    ]\n"
            "  \"start\" (number) The start block height\n"
            "  \"end\" (number) The end block height\n"
            "  \"chainInfo\" (boolean) Include chain info in results, only applies if start and end specified\n"
            "}\n"
            "\nResult:\n"
            "[\n"
            "  {\n"
            "    \"satoshis\"  (number) The difference of satoshis\n"
            "    \"txid\"  (string) The related txid\n"
            "    \"index\"  (number) The related input or output index\n"
            "    \"height\"  (number) The block height\n"
            "    \"address\"  (string) The base58check encoded address\n"
            "  }\n"
            "]\n"
            "\nExamples:\n"
            + HelpExampleCli("getaddressdeltas", "'{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}'")
            + HelpExampleRpc("getaddressdeltas", "{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}")
        );


    UniValue startValue = find_value(params[0].get_obj(), "start");
    UniValue endValue = find_value(params[0].get_obj(), "end");

    UniValue chainInfo = find_value(params[0].get_obj(), "chainInfo");
    bool includeChainInfo = false;
    if (chainInfo.isBool()) {
        includeChainInfo = chainInfo.get_bool();
    }

    int start = 0;
    int end = 0;

    if (startValue.isNum() && endValue.isNum()) {
        start = startValue.get_int();
        end = endValue.get_int();
        if (start <= 0 || end <= 0) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Start and end is expected to be greater than zero");
        }
        if (end < start) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "End value is expected to be greater than start");
        }
    }

    std::vector<std::pair<uint160, int> > addresses;

    if (!getAddressesFromParams(params, addresses)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
    }

    std::vector<std::pair<CAddressIndexKey, CAmount> > addressIndex;

    for (std::vector<std::pair<uint160, int> >::iterator it = addresses.begin(); it != addresses.end(); it++) {
        if (start > 0 && end > 0) {
            if (!GetAddressIndex((*it).first, (*it).second, addressIndex, start, end)) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
            }
        } else {
            if (!GetAddressIndex((*it).first, (*it).second, addressIndex)) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
            }
        }
    }

    UniValue deltas(UniValue::VARR);

    for (std::vector<std::pair<CAddressIndexKey, CAmount> >::const_iterator it=addressIndex.begin(); it!=addressIndex.end(); it++) {
        std::string address;
        if (!getAddressFromIndex(it->first.type, it->first.hashBytes, address)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unknown address type");
        }

        UniValue delta(UniValue::VOBJ);
        delta.push_back(Pair("satoshis", it->second));
        delta.push_back(Pair("txid", it->first.txhash.GetHex()));
        delta.push_back(Pair("index", (int)it->first.index));
        delta.push_back(Pair("blockindex", (int)it->first.txindex));
        delta.push_back(Pair("height", it->first.blockHeight));
        delta.push_back(Pair("address", address));
        deltas.push_back(delta);
    }

    UniValue result(UniValue::VOBJ);

    if (includeChainInfo && start > 0 && end > 0) {
        LOCK(cs_main);

        if (start > chainActive.Height() || end > chainActive.Height()) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Start or end is outside chain range");
        }

        CBlockIndex* startIndex = chainActive[start];
        CBlockIndex* endIndex = chainActive[end];

        UniValue startInfo(UniValue::VOBJ);
        UniValue endInfo(UniValue::VOBJ);

        startInfo.push_back(Pair("hash", startIndex->GetBlockHash().GetHex()));
        startInfo.push_back(Pair("height", start));

        endInfo.push_back(Pair("hash", endIndex->GetBlockHash().GetHex()));
        endInfo.push_back(Pair("height", end));

        result.push_back(Pair("deltas", deltas));
        result.push_back(Pair("start", startInfo));
        result.push_back(Pair("end", endInfo));

        return result;
    } else {
        return deltas;
    }
}

UniValue getaddressbalance(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "getaddressbalance\n"
            "\nReturns the balance for an address(es) (requires addressindex to be enabled).\n"
            "\nArguments:\n"
            "{\n"
            "  \"addresses\"\n"
            "    [\n"
            "      \"address\"  (string) The base58check encoded address\n"
            "      ,...\n"
            "    ]\n"
            "}\n"
            "\nResult:\n"
            "{\n"
            "  \"balance\"  (string) The current balance in satoshis\n"
            "  \"received\"  (string) The total number of satoshis received (including change)\n"
            "}\n"
            "\nExamples:\n"
            + HelpExampleCli("getaddressbalance", "'{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}'")
            + HelpExampleRpc("getaddressbalance", "{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}")
        );

    std::vector<std::pair<uint160, int> > addresses;

    if (!getAddressesFromParams(params, addresses)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
    }

    std::vector<std::pair<CAddressIndexKey, CAmount> > addressIndex;

    for (std::vector<std::pair<uint160, int> >::iterator it = addresses.begin(); it != addresses.end(); it++) {
        if (!GetAddressIndex((*it).first, (*it).second, addressIndex)) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
        }
    }

    CAmount balance = 0;
    CAmount received = 0;

    for (std::vector<std::pair<CAddressIndexKey, CAmount> >::const_iterator it=addressIndex.begin(); it!=addressIndex.end(); it++) {
        if (it->second > 0) {
            received += it->second;
        }
        balance += it->second;
    }

    UniValue result(UniValue::VOBJ);
    result.push_back(Pair("balance", balance));
    result.push_back(Pair("received", received));

    return result;

}

UniValue getaddresstxids(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "getaddresstxids\n"
            "\nReturns the txids for an address(es) (requires addressindex to be enabled).\n"
            "\nArguments:\n"
            "{\n"
            "  \"addresses\"\n"
            "    [\n"
            "      \"address\"  (string) The base58check encoded address\n"
            "      ,...\n"
            "    ]\n"
            "  \"start\" (number) The start block height\n"
            "  \"end\" (number) The end block height\n"
            "}\n"
            "\nResult:\n"
            "[\n"
            "  \"transactionid\"  (string) The transaction id\n"
            "  ,...\n"
            "]\n"
            "\nExamples:\n"
            + HelpExampleCli("getaddresstxids", "'{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}'")
            + HelpExampleRpc("getaddresstxids", "{\"addresses\": [\"12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX\"]}")
        );

    std::vector<std::pair<uint160, int> > addresses;

    if (!getAddressesFromParams(params, addresses)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid address");
    }

    int start = 0;
    int end = 0;
    if (params[0].isObject()) {
        UniValue startValue = find_value(params[0].get_obj(), "start");
        UniValue endValue = find_value(params[0].get_obj(), "end");
        if (startValue.isNum() && endValue.isNum()) {
            start = startValue.get_int();
            end = endValue.get_int();
        }
    }

    std::vector<std::pair<CAddressIndexKey, CAmount> > addressIndex;

    for (std::vector<std::pair<uint160, int> >::iterator it = addresses.begin(); it != addresses.end(); it++) {
        if (start > 0 && end > 0) {
            if (!GetAddressIndex((*it).first, (*it).second, addressIndex, start, end)) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
            }
        } else {
            if (!GetAddressIndex((*it).first, (*it).second, addressIndex)) {
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available for address");
            }
        }
    }

    std::set<std::pair<int, std::string> > txids;
    UniValue result(UniValue::VARR);

    for (std::vector<std::pair<CAddressIndexKey, CAmount> >::const_iterator it=addressIndex.begin(); it!=addressIndex.end(); it++) {
        int height = it->first.blockHeight;
        std::string txid = it->first.txhash.GetHex();

        if (addresses.size() > 1) {
            txids.insert(std::make_pair(height, txid));
        } else {
            if (txids.insert(std::make_pair(height, txid)).second) {
                result.push_back(txid);
            }
        }
    }

    if (addresses.size() > 1) {
        for (std::set<std::pair<int, std::string> >::const_iterator it=txids.begin(); it!=txids.end(); it++) {
            result.push_back(it->second);
        }
    }

    return result;

}

UniValue getspentinfo(const UniValue& params, bool fHelp)
{

    if (fHelp || params.size() != 1 || !params[0].isObject())
        throw runtime_error(
            "getspentinfo\n"
            "\nReturns the txid and index where an output is spent.\n"
            "\nArguments:\n"
            "{\n"
            "  \"txid\" (string) The hex string of the txid\n"
            "  \"index\" (number) The start block height\n"
            "}\n"
            "\nResult:\n"
            "{\n"
            "  \"txid\"  (string) The transaction id\n"
            "  \"index\"  (number) The spending input index\n"
            "  ,...\n"
            "}\n"
            "\nExamples:\n"
            + HelpExampleCli("getspentinfo", "'{\"txid\": \"0437cd7f8525ceed2324359c2d0ba26006d92d856a9c20fa0241106ee5a597c9\", \"index\": 0}'")
            + HelpExampleRpc("getspentinfo", "{\"txid\": \"0437cd7f8525ceed2324359c2d0ba26006d92d856a9c20fa0241106ee5a597c9\", \"index\": 0}")
        );

    UniValue txidValue = find_value(params[0].get_obj(), "txid");
    UniValue indexValue = find_value(params[0].get_obj(), "index");

    if (!txidValue.isStr() || !indexValue.isNum()) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid txid or index");
    }

    uint256 txid = ParseHashV(txidValue, "txid");
    int outputIndex = indexValue.get_int();

    CSpentIndexKey key(txid, outputIndex);
    CSpentIndexValue value;

    if (!GetSpentIndex(key, value)) {
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Unable to get spent info");
    }

    UniValue obj(UniValue::VOBJ);
    obj.push_back(Pair("txid", value.txid.GetHex()));
    obj.push_back(Pair("index", (int)value.inputIndex));
    obj.push_back(Pair("height", value.blockHeight));

    return obj;
}