// 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 "core_io.h"
#include "init.h"
#include "keystore.h"
#include "main.h"
#include "net.h"
#include "primitives/transaction.h"
#include "zagr/deterministicmint.h"
#include "rpc/server.h"
#include "script/script.h"
#include "script/script_error.h"
#include "script/sign.h"
#include "script/standard.h"
#include "swifttx.h"
#include "uint256.h"
#include "utilmoneystr.h"
#include "zagrchain.h"
#ifdef ENABLE_WALLET
#include "wallet/wallet.h"
#endif

#include <stdint.h>

#include <boost/assign/list_of.hpp>

#include <univalue.h>

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

void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex)
{
    txnouttype type;
    vector<CTxDestination> addresses;
    int nRequired;

    out.push_back(Pair("asm", scriptPubKey.ToString()));
    if (fIncludeHex)
        out.push_back(Pair("hex", HexStr(scriptPubKey.begin(), scriptPubKey.end())));

    if (!ExtractDestinations(scriptPubKey, type, addresses, nRequired)) {
        out.push_back(Pair("type", GetTxnOutputType(type)));
        return;
    }

    out.push_back(Pair("reqSigs", nRequired));
    out.push_back(Pair("type", GetTxnOutputType(type)));

    UniValue a(UniValue::VARR);
    for (const CTxDestination& addr : addresses)
        a.push_back(CBitcoinAddress(addr).ToString());
    out.push_back(Pair("addresses", a));
}

void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry)
{
    // Call into TxToUniv() in bitcoin-common to decode the transaction hex.
    //
    // Blockchain contextual information (confirmations and blocktime) is not
    // available to code in bitcoin-common, so we query them here and push the
    // data into the returned UniValue.
    TxToUniv(tx, uint256(), entry);

    if (!hashBlock.IsNull()) {
        entry.push_back(Pair("blockhash", hashBlock.GetHex()));
        BlockMap::iterator mi = mapBlockIndex.find(hashBlock);
        if (mi != mapBlockIndex.end() && (*mi).second) {
            CBlockIndex* pindex = (*mi).second;
            if (chainActive.Contains(pindex)) {
                entry.push_back(Pair("confirmations", 1 + chainActive.Height() - pindex->nHeight));
                entry.push_back(Pair("time", pindex->GetBlockTime()));
                entry.push_back(Pair("blocktime", pindex->GetBlockTime()));
            }
            else
                entry.push_back(Pair("confirmations", 0));
        }
    }
}

UniValue getrawtransaction(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 3)
        throw runtime_error(
            "getrawtransaction \"txid\" ( verbose \"blockhash\" )\n"

            "\nNOTE: By default this function only works sometimes. This is when the tx is in the mempool\n"
            "or there is an unspent output in the utxo for this transaction. To make it always work,\n"
            "you need to maintain a transaction index, using the -txindex command line option.\n"

            "\nReturn the raw transaction data.\n"
            "\nIf verbose is 'true', returns an Object with information about 'txid'.\n"
            "If verbose is 'false' or omitted, returns a string that is serialized, hex-encoded data for 'txid'.\n"

            "\nArguments:\n"
            "1. \"txid\"      (string, required) The transaction id\n"
            "2. verbose     (bool, optional, default=false) If false, return a string, otherwise return a json object\n"
            "3. \"blockhash\" (string, optional) The block in which to look for the transaction\n"

            "\nResult (if verbose is not set or set to false):\n"
            "\"data\"      (string) The serialized, hex-encoded data for 'txid'\n"

            "\nResult (if verbose is set to true):\n"
            "{\n"
            "  \"in_active_chain\": b, (bool) Whether specified block is in the active chain or not (only present with explicit \"blockhash\" argument)\n"
            "  \"hex\" : \"data\",       (string) The serialized, hex-encoded data for 'txid'\n"
            "  \"txid\" : \"id\",        (string) The transaction id (same as provided)\n"
            "  \"size\" : n,             (numeric) The serialized transaction size\n"
            "  \"version\" : n,          (numeric) The version\n"
            "  \"locktime\" : ttt,       (numeric) The lock time\n"
            "  \"vin\" : [               (array of json objects)\n"
            "     {\n"
            "       \"txid\": \"id\",    (string) The transaction id\n"
            "       \"vout\": n,         (numeric) \n"
            "       \"scriptSig\": {     (json object) The script\n"
            "         \"asm\": \"asm\",  (string) asm\n"
            "         \"hex\": \"hex\"   (string) hex\n"
            "       },\n"
            "       \"sequence\": n      (numeric) The script sequence number\n"
            "     }\n"
            "     ,...\n"
            "  ],\n"
            "  \"vout\" : [              (array of json objects)\n"
            "     {\n"
            "       \"value\" : x.xxx,            (numeric) The value in btc\n"
            "       \"n\" : n,                    (numeric) index\n"
            "       \"scriptPubKey\" : {          (json object)\n"
            "         \"asm\" : \"asm\",          (string) the asm\n"
            "         \"hex\" : \"hex\",          (string) the hex\n"
            "         \"reqSigs\" : n,            (numeric) The required sigs\n"
            "         \"type\" : \"pubkeyhash\",  (string) The type, eg 'pubkeyhash'\n"
            "         \"addresses\" : [           (json array of string)\n"
            "           \"agrarianaddress\"        (string) agrarian address\n"
            "           ,...\n"
            "         ]\n"
            "       }\n"
            "     }\n"
            "     ,...\n"
            "  ],\n"
            "  \"blockhash\" : \"hash\",   (string) the block hash\n"
            "  \"confirmations\" : n,      (numeric) The confirmations\n"
            "  \"time\" : ttt,             (numeric) The transaction time in seconds since epoch (Jan 1 1970 GMT)\n"
            "  \"blocktime\" : ttt         (numeric) The block time in seconds since epoch (Jan 1 1970 GMT)\n"
            "}\n"

            "\nExamples:\n"
            + HelpExampleCli("getrawtransaction", "\"mytxid\"")
            + HelpExampleCli("getrawtransaction", "\"mytxid\" true")
            + HelpExampleRpc("getrawtransaction", "\"mytxid\", true")
            + HelpExampleCli("getrawtransaction", "\"mytxid\" false \"myblockhash\"")
            + HelpExampleCli("getrawtransaction", "\"mytxid\" true \"myblockhash\"")
        );

    LOCK(cs_main);

    bool in_active_chain = true;
    uint256 hash = ParseHashV(params[0], "parameter 1");
    CBlockIndex* blockindex = nullptr;

    bool fVerbose = false;
    if (!params[1].isNull()) {
        fVerbose = params[1].isNum() ? (params[1].get_int() != 0) : params[1].get_bool();
    }

    if (!params[2].isNull()) {
        uint256 blockhash = ParseHashV(params[2], "parameter 3");
        BlockMap::iterator it = mapBlockIndex.find(blockhash);
        if (it == mapBlockIndex.end()) {
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Block hash not found");
        }
        blockindex = it->second;
        in_active_chain = chainActive.Contains(blockindex);
    }

    CTransaction tx;
    uint256 hash_block;
    if (!GetTransaction(hash, tx, hash_block, true, blockindex)) {
        std::string errmsg;
        if (blockindex) {
            if (!(blockindex->nStatus & BLOCK_HAVE_DATA)) {
                throw JSONRPCError(RPC_MISC_ERROR, "Block not available");
            }
            errmsg = "No such transaction found in the provided block";
        } else {
            errmsg = fTxIndex
              ? "No such mempool or blockchain transaction"
              : "No such mempool transaction. Use -txindex to enable blockchain transaction queries";
        }
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, errmsg + ". Use gettransaction for wallet transactions.");
    }

    if (!fVerbose) {
        return EncodeHexTx(tx);
    }

    UniValue result(UniValue::VOBJ);
    if (blockindex) result.push_back(Pair("in_active_chain", in_active_chain));
    TxToJSON(tx, hash_block, result);
    return result;
}

#ifdef ENABLE_WALLET
UniValue listunspent(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() > 4)
        throw runtime_error(
            "listunspent ( minconf maxconf  [\"address\",...] watchonlyconfig )\n"
            "\nReturns array of unspent transaction outputs\n"
            "with between minconf and maxconf (inclusive) confirmations.\n"
            "Optionally filter to only include txouts paid to specified addresses.\n"
            "Results are an array of Objects, each of which has:\n"
            "{txid, vout, scriptPubKey, amount, confirmations, spendable}\n"

            "\nArguments:\n"
            "1. minconf          (numeric, optional, default=1) The minimum confirmations to filter\n"
            "2. maxconf          (numeric, optional, default=9999999) The maximum confirmations to filter\n"
            "3. \"addresses\"    (string) A json array of agrarian addresses to filter\n"
            "    [\n"
            "      \"address\"   (string) agrarian address\n"
            "      ,...\n"
            "    ]\n"
            "4. watchonlyconfig  (numeric, optional, default=1) 1 = list regular unspent transactions, 2 = list only watchonly transactions,  3 = list all unspent transactions (including watchonly)\n"

            "\nResult\n"
            "[                   (array of json object)\n"
            "  {\n"
            "    \"txid\" : \"txid\",        (string) the transaction id\n"
            "    \"vout\" : n,               (numeric) the vout value\n"
            "    \"address\" : \"address\",  (string) the agrarian address\n"
            "    \"account\" : \"account\",  (string) The associated account, or \"\" for the default account\n"
            "    \"scriptPubKey\" : \"key\", (string) the script key\n"
            "    \"redeemScript\" : \"key\", (string) the redeemscript key\n"
            "    \"amount\" : x.xxx,         (numeric) the transaction amount in btc\n"
            "    \"confirmations\" : n,      (numeric) The number of confirmations\n"
            "    \"spendable\" : true|false  (boolean) Whether we have the private keys to spend this output\n"
            "  }\n"
            "  ,...\n"
            "]\n"

            "\nExamples\n" +
            HelpExampleCli("listunspent", "") + HelpExampleCli("listunspent", "6 9999999 \"[\\\"1PGFqEzfmQch1gKD3ra4k18PNj3tTUUSqg\\\",\\\"1LtvqCaApEdUGFkpKMM4MstjcaL4dKg8SP\\\"]\"") + HelpExampleRpc("listunspent", "6, 9999999 \"[\\\"1PGFqEzfmQch1gKD3ra4k18PNj3tTUUSqg\\\",\\\"1LtvqCaApEdUGFkpKMM4MstjcaL4dKg8SP\\\"]\""));

    RPCTypeCheck(params, boost::assign::list_of(UniValue::VNUM)(UniValue::VNUM)(UniValue::VARR)(UniValue::VNUM));

    int nMinDepth = 1;
    if (params.size() > 0)
        nMinDepth = params[0].get_int();

    int nMaxDepth = 9999999;
    if (params.size() > 1)
        nMaxDepth = params[1].get_int();

    set<CBitcoinAddress> setAddress;
    if (params.size() > 2) {
        UniValue inputs = params[2].get_array();
        for (unsigned int inx = 0; inx < inputs.size(); inx++) {
            const UniValue& input = inputs[inx];
            CBitcoinAddress address(input.get_str());
            if (!address.IsValid())
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, string("Invalid Agrarian address: ") + input.get_str());
            if (setAddress.count(address))
                throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated address: ") + input.get_str());
            setAddress.insert(address);
        }
    }

    int nWatchonlyConfig = 1;
    if(params.size() > 3) {
        nWatchonlyConfig = params[3].get_int();
        if (nWatchonlyConfig > 3 || nWatchonlyConfig < 1)
            nWatchonlyConfig = 1;
    }

    UniValue results(UniValue::VARR);
    vector<COutput> vecOutputs;
    assert(pwalletMain != NULL);
    LOCK2(cs_main, pwalletMain->cs_wallet);
    pwalletMain->AvailableCoins(vecOutputs, false, NULL, false, ALL_COINS, false, nWatchonlyConfig);
    for (const COutput& out : vecOutputs) {
        if (out.nDepth < nMinDepth || out.nDepth > nMaxDepth)
            continue;

        if (setAddress.size()) {
            CTxDestination address;
            if (!ExtractDestination(out.tx->vout[out.i].scriptPubKey, address))
                continue;

            if (!setAddress.count(address))
                continue;
        }

        CAmount nValue = out.tx->vout[out.i].nValue;
        const CScript& pk = out.tx->vout[out.i].scriptPubKey;
        UniValue entry(UniValue::VOBJ);
        entry.push_back(Pair("txid", out.tx->GetHash().GetHex()));
        entry.push_back(Pair("vout", out.i));
        CTxDestination address;
        if (ExtractDestination(out.tx->vout[out.i].scriptPubKey, address)) {
            entry.push_back(Pair("address", CBitcoinAddress(address).ToString()));
            if (pwalletMain->mapAddressBook.count(address))
                entry.push_back(Pair("account", pwalletMain->mapAddressBook[address].name));
        }
        entry.push_back(Pair("scriptPubKey", HexStr(pk.begin(), pk.end())));
        if (pk.IsPayToScriptHash()) {
            CTxDestination address;
            if (ExtractDestination(pk, address)) {
                const CScriptID& hash = boost::get<CScriptID>(address);
                CScript redeemScript;
                if (pwalletMain->GetCScript(hash, redeemScript))
                    entry.push_back(Pair("redeemScript", HexStr(redeemScript.begin(), redeemScript.end())));
            }
        }
        entry.push_back(Pair("amount", ValueFromAmount(nValue)));
        entry.push_back(Pair("confirmations", out.nDepth));
        entry.push_back(Pair("spendable", out.fSpendable));
        results.push_back(entry);
    }

    return results;
}
#endif

UniValue createrawtransaction(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 2 || params.size() > 3)
        throw runtime_error(
            "createrawtransaction [{\"txid\":\"id\",\"vout\":n},...] {\"address\":amount,...} ( locktime )\n"
            "\nCreate a transaction spending the given inputs and sending to the given addresses.\n"
            "Returns hex-encoded raw transaction.\n"
            "Note that the transaction's inputs are not signed, and\n"
            "it is not stored in the wallet or transmitted to the network.\n"

            "\nArguments:\n"
            "1. \"transactions\"        (string, required) A json array of json objects\n"
            "     [\n"
            "       {\n"
            "         \"txid\":\"id\",  (string, required) The transaction id\n"
            "         \"vout\":n,       (numeric, required) The output number\n"
            "         \"sequence\":n    (numeric, optional) The sequence number\n"
            "       }\n"
            "       ,...\n"
            "     ]\n"
            "2. \"addresses\"           (string, required) a json object with addresses as keys and amounts as values\n"
            "    {\n"
            "      \"address\": x.xxx   (numeric, required) The key is the agrarian address, the value is the btc amount\n"
            "      ,...\n"
            "    }\n"
            "3. locktime                (numeric, optional, default=0) Raw locktime. Non-0 value also locktime-activates inputs\n"

            "\nResult:\n"
            "\"transaction\"            (string) hex string of the transaction\n"

            "\nExamples\n" +
            HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\" \"{\\\"address\\\":0.01}\"") + HelpExampleRpc("createrawtransaction", "\"[{\\\"txid\\\":\\\"myid\\\",\\\"vout\\\":0}]\", \"{\\\"address\\\":0.01}\""));

    LOCK(cs_main);
    RPCTypeCheck(params, boost::assign::list_of(UniValue::VARR)(UniValue::VOBJ)(UniValue::VNUM));
    if (params[0].isNull() || params[1].isNull())
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, arguments 1 and 2 must be non-null");

    UniValue inputs = params[0].get_array();
    UniValue sendTo = params[1].get_obj();

    CMutableTransaction rawTx;

    if (params.size() > 2 && !params[2].isNull()) {
        int64_t nLockTime = params[2].get_int64();
        if (nLockTime < 0 || nLockTime > std::numeric_limits<uint32_t>::max())
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, locktime out of range");
        rawTx.nLockTime = nLockTime;
    }

    for (unsigned int idx = 0; idx < inputs.size(); idx++) {
        const UniValue& input = inputs[idx];
        const UniValue& o = input.get_obj();

        uint256 txid = ParseHashO(o, "txid");

        const UniValue& vout_v = find_value(o, "vout");
        if (!vout_v.isNum())
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, missing vout key");
        int nOutput = vout_v.get_int();
        if (nOutput < 0)
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, vout must be positive");

        uint32_t nSequence = (rawTx.nLockTime ? std::numeric_limits<uint32_t>::max() - 1 : std::numeric_limits<uint32_t>::max());

        // set the sequence number if passed in the parameters object
        const UniValue& sequenceObj = find_value(o, "sequence");
        if (sequenceObj.isNum()) {
            int64_t seqNr64 = sequenceObj.get_int64();
            if (seqNr64 < 0 || seqNr64 > std::numeric_limits<uint32_t>::max())
                throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, sequence number is out of range");
            else
                nSequence = (uint32_t)seqNr64;
        }

        CTxIn in(COutPoint(txid, nOutput), CScript(), nSequence);

        rawTx.vin.push_back(in);
    }

    set<CBitcoinAddress> setAddress;
    vector<string> addrList = sendTo.getKeys();
    for (const string& name_ : addrList) {
        CBitcoinAddress address(name_);
        if (!address.IsValid())
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, string("Invalid Agrarian address: ")+name_);

        if (setAddress.count(address))
            throw JSONRPCError(RPC_INVALID_PARAMETER, string("Invalid parameter, duplicated address: ")+name_);
        setAddress.insert(address);

        CScript scriptPubKey = GetScriptForDestination(address.Get());
        CAmount nAmount = AmountFromValue(sendTo[name_]);

        CTxOut out(nAmount, scriptPubKey);
        rawTx.vout.push_back(out);
    }

    return EncodeHexTx(rawTx);
}

UniValue decoderawtransaction(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "decoderawtransaction \"hexstring\"\n"
            "\nReturn a JSON object representing the serialized, hex-encoded transaction.\n"

            "\nArguments:\n"
            "1. \"hex\"      (string, required) The transaction hex string\n"

            "\nResult:\n"
            "{\n"
            "  \"txid\" : \"id\",        (string) The transaction id\n"
            "  \"size\" : n,             (numeric) The transaction size\n"
            "  \"version\" : n,          (numeric) The version\n"
            "  \"locktime\" : ttt,       (numeric) The lock time\n"
            "  \"vin\" : [               (array of json objects)\n"
            "     {\n"
            "       \"txid\": \"id\",    (string) The transaction id\n"
            "       \"vout\": n,         (numeric) The output number\n"
            "       \"scriptSig\": {     (json object) The script\n"
            "         \"asm\": \"asm\",  (string) asm\n"
            "         \"hex\": \"hex\"   (string) hex\n"
            "       },\n"
            "       \"sequence\": n     (numeric) The script sequence number\n"
            "     }\n"
            "     ,...\n"
            "  ],\n"
            "  \"vout\" : [             (array of json objects)\n"
            "     {\n"
            "       \"value\" : x.xxx,            (numeric) The value in btc\n"
            "       \"n\" : n,                    (numeric) index\n"
            "       \"scriptPubKey\" : {          (json object)\n"
            "         \"asm\" : \"asm\",          (string) the asm\n"
            "         \"hex\" : \"hex\",          (string) the hex\n"
            "         \"reqSigs\" : n,            (numeric) The required sigs\n"
            "         \"type\" : \"pubkeyhash\",  (string) The type, eg 'pubkeyhash'\n"
            "         \"addresses\" : [           (json array of string)\n"
            "           \"12tvKAXCxZjSmdNbao16dKXC8tRWfcF5oc\"   (string) agrarian address\n"
            "           ,...\n"
            "         ]\n"
            "       }\n"
            "     }\n"
            "     ,...\n"
            "  ],\n"
            "}\n"

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

    LOCK(cs_main);
    RPCTypeCheck(params, boost::assign::list_of(UniValue::VSTR));

    CTransaction tx;

    if (!DecodeHexTx(tx, params[0].get_str()))
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");

    UniValue result(UniValue::VOBJ);
    TxToJSON(tx, 0, result);

    return result;
}

UniValue decodescript(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "decodescript \"hex\"\n"
            "\nDecode a hex-encoded script.\n"

            "\nArguments:\n"
            "1. \"hex\"     (string) the hex encoded script\n"

            "\nResult:\n"
            "{\n"
            "  \"asm\":\"asm\",   (string) Script public key\n"
            "  \"hex\":\"hex\",   (string) hex encoded public key\n"
            "  \"type\":\"type\", (string) The output type\n"
            "  \"reqSigs\": n,    (numeric) The required signatures\n"
            "  \"addresses\": [   (json array of string)\n"
            "     \"address\"     (string) agrarian address\n"
            "     ,...\n"
            "  ],\n"
            "  \"p2sh\",\"address\" (string) script address\n"
            "}\n"

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

    LOCK(cs_main);
    RPCTypeCheck(params, boost::assign::list_of(UniValue::VSTR));

    UniValue r(UniValue::VOBJ);
    CScript script;
    if (params[0].get_str().size() > 0) {
        vector<unsigned char> scriptData(ParseHexV(params[0], "argument"));
        script = CScript(scriptData.begin(), scriptData.end());
    } else {
        // Empty scripts are valid
    }
    ScriptPubKeyToJSON(script, r, false);

    r.push_back(Pair("p2sh", CBitcoinAddress(CScriptID(script)).ToString()));
    return r;
}

/** Pushes a JSON object for script verification or signing errors to vErrorsRet. */
static void TxInErrorToJSON(const CTxIn& txin, UniValue& vErrorsRet, const std::string& strMessage)
{
    UniValue entry(UniValue::VOBJ);
    entry.push_back(Pair("txid", txin.prevout.hash.ToString()));
    entry.push_back(Pair("vout", (uint64_t)txin.prevout.n));
    entry.push_back(Pair("scriptSig", HexStr(txin.scriptSig.begin(), txin.scriptSig.end())));
    entry.push_back(Pair("sequence", (uint64_t)txin.nSequence));
    entry.push_back(Pair("error", strMessage));
    vErrorsRet.push_back(entry);
}

UniValue signrawtransaction(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 4)
        throw runtime_error(
            "signrawtransaction \"hexstring\" ( [{\"txid\":\"id\",\"vout\":n,\"scriptPubKey\":\"hex\",\"redeemScript\":\"hex\"},...] [\"privatekey1\",...] sighashtype )\n"
            "\nSign inputs for raw transaction (serialized, hex-encoded).\n"
            "The second optional argument (may be null) is an array of previous transaction outputs that\n"
            "this transaction depends on but may not yet be in the block chain.\n"
            "The third optional argument (may be null) is an array of base58-encoded private\n"
            "keys that, if given, will be the only keys used to sign the transaction.\n"
#ifdef ENABLE_WALLET
            + HelpRequiringPassphrase() + "\n"
#endif

            "\nArguments:\n"
            "1. \"hexstring\"     (string, required) The transaction hex string\n"
            "2. \"prevtxs\"       (string, optional) An json array of previous dependent transaction outputs\n"
            "     [               (json array of json objects, or 'null' if none provided)\n"
            "       {\n"
            "         \"txid\":\"id\",             (string, required) The transaction id\n"
            "         \"vout\":n,                  (numeric, required) The output number\n"
            "         \"scriptPubKey\": \"hex\",   (string, required) script key\n"
            "         \"redeemScript\": \"hex\"    (string, required for P2SH) redeem script\n"
            "       }\n"
            "       ,...\n"
            "    ]\n"
            "3. \"privatekeys\"     (string, optional) A json array of base58-encoded private keys for signing\n"
            "    [                  (json array of strings, or 'null' if none provided)\n"
            "      \"privatekey\"   (string) private key in base58-encoding\n"
            "      ,...\n"
            "    ]\n"
            "4. \"sighashtype\"     (string, optional, default=ALL) The signature hash type. Must be one of\n"
            "       \"ALL\"\n"
            "       \"NONE\"\n"
            "       \"SINGLE\"\n"
            "       \"ALL|ANYONECANPAY\"\n"
            "       \"NONE|ANYONECANPAY\"\n"
            "       \"SINGLE|ANYONECANPAY\"\n"

            "\nResult:\n"
            "{\n"
            "  \"hex\" : \"value\",           (string) The hex-encoded raw transaction with signature(s)\n"
            "  \"complete\" : true|false,   (boolean) If the transaction has a complete set of signatures\n"
            "  \"errors\" : [                 (json array of objects) Script verification errors (if there are any)\n"
            "    {\n"
            "      \"txid\" : \"hash\",           (string) The hash of the referenced, previous transaction\n"
            "      \"vout\" : n,                (numeric) The index of the output to spent and used as input\n"
            "      \"scriptSig\" : \"hex\",       (string) The hex-encoded signature script\n"
            "      \"sequence\" : n,            (numeric) Script sequence number\n"
            "      \"error\" : \"text\"           (string) Verification or signing error related to the input\n"
            "    }\n"
            "    ,...\n"
            "  ]\n"
            "}\n"

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

#ifdef ENABLE_WALLET
    LOCK2(cs_main, pwalletMain ? &pwalletMain->cs_wallet : NULL);
#else
    LOCK(cs_main);
#endif
    RPCTypeCheck(params, boost::assign::list_of(UniValue::VSTR)(UniValue::VARR)(UniValue::VARR)(UniValue::VSTR), true);

    vector<unsigned char> txData(ParseHexV(params[0], "argument 1"));
    CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION);
    vector<CMutableTransaction> txVariants;
    while (!ssData.empty()) {
        try {
            CMutableTransaction tx;
            ssData >> tx;
            txVariants.push_back(tx);
        } catch (const std::exception&) {
            throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
        }
    }

    if (txVariants.empty())
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "Missing transaction");

    // mergedTx will end up with all the signatures; it
    // starts as a clone of the rawtx:
    CMutableTransaction mergedTx(txVariants[0]);

    // Fetch previous transactions (inputs):
    std::map<COutPoint, CScript> mapPrevOut;
    if (Params().NetworkID() == CBaseChainParams::REGTEST) {
        for (const CTxIn &txbase : mergedTx.vin)
        {
            CTransaction tempTx;
            uint256 hashBlock;
            if (GetTransaction(txbase.prevout.hash, tempTx, hashBlock, true)) {
                // Copy results into mapPrevOut:
                mapPrevOut[txbase.prevout] = tempTx.vout[txbase.prevout.n].scriptPubKey;
            }
        }
    }
    CCoinsView viewDummy;
    CCoinsViewCache view(&viewDummy);
    {
        LOCK(mempool.cs);
        CCoinsViewCache& viewChain = *pcoinsTip;
        CCoinsViewMemPool viewMempool(&viewChain, mempool);
        view.SetBackend(viewMempool); // temporarily switch cache backend to db+mempool view

        for (const CTxIn& txin : mergedTx.vin) {
            const uint256& prevHash = txin.prevout.hash;
            CCoins coins;
            view.AccessCoins(prevHash); // this is certainly allowed to fail
        }

        view.SetBackend(viewDummy); // switch back to avoid locking mempool for too long
    }

    bool fGivenKeys = false;
    CBasicKeyStore tempKeystore;
    if (params.size() > 2 && !params[2].isNull()) {
        fGivenKeys = true;
        UniValue keys = params[2].get_array();
        for (unsigned int idx = 0; idx < keys.size(); idx++) {
            UniValue k = keys[idx];
            CBitcoinSecret vchSecret;
            bool fGood = vchSecret.SetString(k.get_str());
            if (!fGood)
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid private key");
            CKey key = vchSecret.GetKey();
            if (!key.IsValid())
                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Private key outside allowed range");
            tempKeystore.AddKey(key);
        }
    }
#ifdef ENABLE_WALLET
    else if (pwalletMain)
        EnsureWalletIsUnlocked();
#endif

    // Add previous txouts given in the RPC call:
    if (params.size() > 1 && !params[1].isNull()) {
        UniValue prevTxs = params[1].get_array();
        for (unsigned int idx = 0; idx < prevTxs.size(); idx++) {
            const UniValue& p = prevTxs[idx];
            if (!p.isObject())
                throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "expected object with {\"txid'\",\"vout\",\"scriptPubKey\"}");

            UniValue prevOut = p.get_obj();

            RPCTypeCheckObj(prevOut, boost::assign::map_list_of("txid", UniValue::VSTR)("vout", UniValue::VNUM)("scriptPubKey", UniValue::VSTR));

            uint256 txid = ParseHashO(prevOut, "txid");

            int nOut = find_value(prevOut, "vout").get_int();
            if (nOut < 0)
                throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "vout must be positive");

            vector<unsigned char> pkData(ParseHexO(prevOut, "scriptPubKey"));
            CScript scriptPubKey(pkData.begin(), pkData.end());

            {
                CCoinsModifier coins = view.ModifyCoins(txid);
                if (coins->IsAvailable(nOut) && coins->vout[nOut].scriptPubKey != scriptPubKey) {
                    string err("Previous output scriptPubKey mismatch:\n");
                    err = err + coins->vout[nOut].scriptPubKey.ToString() + "\nvs:\n" +
                          scriptPubKey.ToString();
                    throw JSONRPCError(RPC_DESERIALIZATION_ERROR, err);
                }
                if ((unsigned int)nOut >= coins->vout.size())
                    coins->vout.resize(nOut + 1);
                coins->vout[nOut].scriptPubKey = scriptPubKey;
                coins->vout[nOut].nValue = 0; // we don't know the actual output value
            }

            // if redeemScript given and not using the local wallet (private keys
            // given), add redeemScript to the tempKeystore so it can be signed:
            if (fGivenKeys && scriptPubKey.IsPayToScriptHash()) {
                RPCTypeCheckObj(prevOut, boost::assign::map_list_of("txid", UniValue::VSTR)("vout", UniValue::VNUM)("scriptPubKey", UniValue::VSTR)("redeemScript",UniValue::VSTR));
                UniValue v = find_value(prevOut, "redeemScript");
                if (!v.isNull()) {
                    vector<unsigned char> rsData(ParseHexV(v, "redeemScript"));
                    CScript redeemScript(rsData.begin(), rsData.end());
                    tempKeystore.AddCScript(redeemScript);
                }
            }
        }
    }

#ifdef ENABLE_WALLET
    const CKeyStore& keystore = ((fGivenKeys || !pwalletMain) ? tempKeystore : *pwalletMain);
#else
    const CKeyStore& keystore = tempKeystore;
#endif

    int nHashType = SIGHASH_ALL;
    if (params.size() > 3 && !params[3].isNull()) {
        static map<string, int> mapSigHashValues =
            boost::assign::map_list_of(string("ALL"), int(SIGHASH_ALL))(string("ALL|ANYONECANPAY"), int(SIGHASH_ALL | SIGHASH_ANYONECANPAY))(string("NONE"), int(SIGHASH_NONE))(string("NONE|ANYONECANPAY"), int(SIGHASH_NONE | SIGHASH_ANYONECANPAY))(string("SINGLE"), int(SIGHASH_SINGLE))(string("SINGLE|ANYONECANPAY"), int(SIGHASH_SINGLE | SIGHASH_ANYONECANPAY));
        string strHashType = params[3].get_str();
        if (mapSigHashValues.count(strHashType))
            nHashType = mapSigHashValues[strHashType];
        else
            throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid sighash param");
    }

    bool fHashSingle = ((nHashType & ~SIGHASH_ANYONECANPAY) == SIGHASH_SINGLE);

    // Script verification errors
    UniValue vErrors(UniValue::VARR);

    // Sign what we can:
    for (unsigned int i = 0; i < mergedTx.vin.size(); i++) {
        CTxIn& txin = mergedTx.vin[i];
        const CCoins* coins = view.AccessCoins(txin.prevout.hash);
        if (Params().NetworkID() == CBaseChainParams::REGTEST) {
            if (mapPrevOut.count(txin.prevout) == 0 && (coins == NULL || !coins->IsAvailable(txin.prevout.n)))
            {
                TxInErrorToJSON(txin, vErrors, "Input not found");
                continue;
            }
        } else {
            if (coins == NULL || !coins->IsAvailable(txin.prevout.n)) {
                TxInErrorToJSON(txin, vErrors, "Input not found or already spent");
                continue;
            }
        }
        const CScript& prevPubKey = (Params().NetworkID() == CBaseChainParams::REGTEST && mapPrevOut.count(txin.prevout) != 0 ? mapPrevOut[txin.prevout] : coins->vout[txin.prevout.n].scriptPubKey);

        txin.scriptSig.clear();
        // Only sign SIGHASH_SINGLE if there's a corresponding output:
        if (!fHashSingle || (i < mergedTx.vout.size()))
            SignSignature(keystore, prevPubKey, mergedTx, i, nHashType);

        // ... and merge in other signatures:
        for (const CMutableTransaction& txv : txVariants) {
            txin.scriptSig = CombineSignatures(prevPubKey, mergedTx, i, txin.scriptSig, txv.vin[i].scriptSig);
        }
        ScriptError serror = SCRIPT_ERR_OK;
        if (!VerifyScript(txin.scriptSig, prevPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(&mergedTx, i), &serror)) {
            TxInErrorToJSON(txin, vErrors, ScriptErrorString(serror));
        }
    }
    bool fComplete = vErrors.empty();

    UniValue result(UniValue::VOBJ);
    result.push_back(Pair("hex", EncodeHexTx(mergedTx)));
    result.push_back(Pair("complete", fComplete));
    if (!vErrors.empty()) {
        result.push_back(Pair("errors", vErrors));
    }

    return result;
}

UniValue sendrawtransaction(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 3)
        throw runtime_error(
            "sendrawtransaction \"hexstring\" ( allowhighfees )\n"
            "\nSubmits raw transaction (serialized, hex-encoded) to local node and network.\n"
            "\nAlso see createrawtransaction and signrawtransaction calls.\n"

            "\nArguments:\n"
            "1. \"hexstring\"    (string, required) The hex string of the raw transaction)\n"
            "2. allowhighfees    (boolean, optional, default=false) Allow high fees\n"
            "3. swiftx           (boolean, optional, default=false) Use SwiftX to send this transaction\n"

            "\nResult:\n"
            "\"hex\"             (string) The transaction hash in hex\n"

            "\nExamples:\n"
            "\nCreate a transaction\n" +
            HelpExampleCli("createrawtransaction", "\"[{\\\"txid\\\" : \\\"mytxid\\\",\\\"vout\\\":0}]\" \"{\\\"myaddress\\\":0.01}\"") +
            "Sign the transaction, and get back the hex\n" + HelpExampleCli("signrawtransaction", "\"myhex\"") +
            "\nSend the transaction (signed hex)\n" + HelpExampleCli("sendrawtransaction", "\"signedhex\"") +
            "\nAs a json rpc call\n" + HelpExampleRpc("sendrawtransaction", "\"signedhex\""));

    LOCK(cs_main);
    RPCTypeCheck(params, boost::assign::list_of(UniValue::VSTR)(UniValue::VBOOL));

    // parse hex string from parameter
    CTransaction tx;
    if (!DecodeHexTx(tx, params[0].get_str()))
        throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
    uint256 hashTx = tx.GetHash();

    bool fOverrideFees = false;
    if (params.size() > 1)
        fOverrideFees = params[1].get_bool();

    bool fSwiftX = false;
    if (params.size() > 2)
        fSwiftX = params[2].get_bool();

    CCoinsViewCache& view = *pcoinsTip;
    const CCoins* existingCoins = view.AccessCoins(hashTx);
    bool fHaveMempool = mempool.exists(hashTx);
    bool fHaveChain = existingCoins && existingCoins->nHeight < 1000000000;
    if (!fHaveMempool && !fHaveChain) {
        // push to local node and sync with wallets
        if (fSwiftX) {
            mapTxLockReq.insert(make_pair(tx.GetHash(), tx));
            CreateNewLock(tx);
            RelayTransactionLockReq(tx, true);
        }
        CValidationState state;
        bool fMissingInputs;
        if (!AcceptToMemoryPool(mempool, state, tx, false, &fMissingInputs, !fOverrideFees)) {
            if (state.IsInvalid()) {
                throw JSONRPCError(RPC_TRANSACTION_REJECTED, strprintf("%i: %s", state.GetRejectCode(), state.GetRejectReason()));
            } else {
                if (fMissingInputs) {
                    throw JSONRPCError(RPC_TRANSACTION_ERROR, "Missing inputs");
                }
                throw JSONRPCError(RPC_TRANSACTION_ERROR, state.GetRejectReason());
            }
        }
    } else if (fHaveChain) {
        throw JSONRPCError(RPC_TRANSACTION_ALREADY_IN_CHAIN, "transaction already in block chain");
    }
    RelayTransaction(tx);

    return hashTx.GetHex();
}

UniValue getspentzerocoinamount(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 2)
        throw runtime_error(
            "getspentzerocoinamount hexstring index\n"
            "\nReturns value of spent zerocoin output designated by transaction hash and input index.\n"

            "\nArguments:\n"
            "1. hash          (hexstring) Transaction hash\n"
            "2. index         (int) Input index\n"

            "\nResult:\n"
            "\"value\"        (int) Spent output value, -1 if error\n"

            "\nExamples:\n" +
            HelpExampleCli("getspentzerocoinamount", "78021ebf92a80dfccef1413067f1222e37535399797cce029bb40ad981131706 0"));

    LOCK(cs_main);

    uint256 txHash = ParseHashV(params[0], "parameter 1");
    int inputIndex = params[1].get_int();
    if (inputIndex < 0)
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter for transaction input");

    CTransaction tx;
    uint256 hashBlock = 0;
    if (!GetTransaction(txHash, tx, hashBlock, true))
        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "No information available about transaction");

    if (inputIndex >= (int)tx.vin.size())
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter for transaction input");

    const CTxIn& input = tx.vin[inputIndex];
    if (!input.IsZerocoinSpend())
        return -1;

    libzerocoin::CoinSpend spend = TxInToZerocoinSpend(input);
    CAmount nValue = libzerocoin::ZerocoinDenominationToAmount(spend.getDenomination());
    return FormatMoney(nValue);
}

#ifdef ENABLE_WALLET
UniValue createrawzerocoinstake(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() != 1)
        throw runtime_error(
            "createrawzerocoinstake mint_input \n"
            "\nCreates raw zAGR coinstakes (without MN output).\n" +
            HelpRequiringPassphrase() + "\n"

            "\nArguments:\n"
            "1. mint_input      (hex string, required) serial hash of the mint used as input\n"

            "\nResult:\n"
            "{\n"
            "   \"hex\": \"xxx\",           (hex string) raw coinstake transaction\n"
            "   \"private-key\": \"xxx\"    (hex string) private key of the input mint [needed to\n"
            "                                            sign a block with this stake]"
            "}\n"
            "\nExamples\n" +
            HelpExampleCli("createrawzerocoinstake", "0d8c16eee7737e3cc1e4e70dc006634182b175e039700931283b202715a0818f") +
            HelpExampleRpc("createrawzerocoinstake", "0d8c16eee7737e3cc1e4e70dc006634182b175e039700931283b202715a0818f"));


    assert(pwalletMain != NULL);
    LOCK2(cs_main, pwalletMain->cs_wallet);

    if(GetAdjustedTime() > GetSporkValue(SPORK_16_ZEROCOIN_MAINTENANCE_MODE))
        throw JSONRPCError(RPC_WALLET_ERROR, "zAGR is currently disabled due to maintenance.");

    std::string serial_hash = params[0].get_str();
    if (!IsHex(serial_hash))
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, expected hex serial hash");

    EnsureWalletIsUnlocked();

    uint256 hashSerial(serial_hash);
    CZerocoinMint input_mint;
    if (!pwalletMain->GetMint(hashSerial, input_mint)) {
        std::string strErr = "Failed to fetch mint associated with serial hash " + serial_hash;
        throw JSONRPCError(RPC_WALLET_ERROR, strErr);
    }

    CMutableTransaction coinstake_tx;

    // create the zerocoinmint output (one spent denom + three 1-zAGR denom)
    libzerocoin::CoinDenomination staked_denom = input_mint.GetDenomination();
    std::vector<CTxOut> vOutMint(5);
    // Mark coin stake transaction
    CScript scriptEmpty;
    scriptEmpty.clear();
    vOutMint[0] = CTxOut(0, scriptEmpty);
    CDeterministicMint dMint;
    if (!pwalletMain->CreateZAGROutPut(staked_denom, vOutMint[1], dMint))
        throw JSONRPCError(RPC_WALLET_ERROR, "failed to create new zagr output");

    for (int i=2; i<5; i++) {
        if (!pwalletMain->CreateZAGROutPut(libzerocoin::ZQ_ONE, vOutMint[i], dMint))
            throw JSONRPCError(RPC_WALLET_ERROR, "failed to create new zagr output");
    }
    coinstake_tx.vout = vOutMint;

    //hash with only the output info in it to be used in Signature of Knowledge
    uint256 hashTxOut = coinstake_tx.GetHash();
    CZerocoinSpendReceipt receipt;

    // create the zerocoinspend input
    CTxIn newTxIn;
    // !TODO: mint checks
    if (!pwalletMain->MintToTxIn(input_mint, hashTxOut, newTxIn, receipt, libzerocoin::SpendType::STAKE))
        throw JSONRPCError(RPC_WALLET_ERROR, "failed to create zc-spend stake input");

    coinstake_tx.vin.push_back(newTxIn);

    UniValue ret(UniValue::VOBJ);
    ret.push_back(Pair("hex", EncodeHexTx(coinstake_tx)));
    CPrivKey pk = input_mint.GetPrivKey();
    CKey key;
    key.SetPrivKey(pk, true);
    ret.push_back(Pair("private-key", HexStr(key)));
    return ret;

}

UniValue createrawzerocoinpublicspend(const UniValue& params, bool fHelp)
{
    if (fHelp || params.size() < 1 || params.size() > 2)
        throw runtime_error(
            "createrawzerocoinpublicspend mint_input \n"
            "\nCreates raw zAGR public spend.\n" +
            HelpRequiringPassphrase() + "\n"

            "\nArguments:\n"
            "1. mint_input      (hex string, required) serial hash of the mint used as input\n"
            "2. \"address\"     (string, optional, default=change) Send to specified address or to a new change address.\n"


            "\nResult:\n"
            "{\n"
            "   \"hex\": \"xxx\",           (hex string) raw public spend signed transaction\n"
            "}\n"
            "\nExamples\n" +
            HelpExampleCli("createrawzerocoinpublicspend", "0d8c16eee7737e3cc1e4e70dc006634182b175e039700931283b202715a0818f") +
            HelpExampleRpc("createrawzerocoinpublicspend", "0d8c16eee7737e3cc1e4e70dc006634182b175e039700931283b202715a0818f"));


    assert(pwalletMain != NULL);
    LOCK2(cs_main, pwalletMain->cs_wallet);

    std::string serial_hash = params[0].get_str();
    if (!IsHex(serial_hash))
        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, expected hex serial hash");

    std::string address_str = "";
    CBitcoinAddress address;
    CBitcoinAddress* addr_ptr = nullptr;
    if (params.size() > 1) {
        address_str = params[1].get_str();
        address = CBitcoinAddress(address_str);
        if(!address.IsValid())
            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Agrarian address");
        addr_ptr = &address;
    }

    EnsureWalletIsUnlocked();

    uint256 hashSerial(serial_hash);
    CZerocoinMint input_mint;
    if (!pwalletMain->GetMint(hashSerial, input_mint)) {
        std::string strErr = "Failed to fetch mint associated with serial hash " + serial_hash;
        throw JSONRPCError(RPC_WALLET_ERROR, strErr);
    }
    CAmount nAmount = input_mint.GetDenominationAsAmount();
    vector<CZerocoinMint> vMintsSelected = vector<CZerocoinMint>(1,input_mint);

    // create the spend
    CWalletTx rawTx;
    CZerocoinSpendReceipt receipt;
    CReserveKey reserveKey(pwalletMain);
    vector<CDeterministicMint> vNewMints;
    if (!pwalletMain->CreateZerocoinSpendTransaction(nAmount, rawTx, reserveKey, receipt, vMintsSelected, vNewMints, false, true, addr_ptr, true))
        throw JSONRPCError(RPC_WALLET_ERROR, receipt.GetStatusMessage());

    // output the raw transaction
    return EncodeHexTx(rawTx);
}
#endif

