luckystrike.sol

/**
 * Source Code first verified at https://etherscan.io on Tuesday, May 21, 2019
 (UTC) */

pragma solidity 0.4.20;

// we use solidity solidity 0.4.20 to work with oraclize (http://www.oraclize.it)
// solidity versions > 0.4.20 are not supported by oraclize

/*
Lucky Strike smart contracts version: 5.1.0
last change: 2019-05-21
*/

/*
This smart contract is intended for entertainment purposes only. Cryptocurrency gambling is illegal in many jurisdictions and users should consult their legal counsel regarding the legal status of cryptocurrency gambling in their jurisdictions.
Since developers of this smart contract are unable to determine which jurisdiction you reside in, you must check current laws including your local and state laws to find out if cryptocurrency gambling is legal in your area.
If you reside in a location where cryptocurrency gambling is illegal, please do not interact with this smart contract in any way and leave it immediately.
*/

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 * source: https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/math/SafeMath.sol
 */
library SafeMath {

    /**
    * @dev Multiplies two numbers, throws on overflow.
    */
    function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
        if (a == 0) {
            return 0;
        }
        c = a * b;
        assert(c / a == b);
        return c;
    }

    /**
    * @dev Integer division of two numbers, truncating the quotient.
    */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // assert(b > 0); // Solidity automatically throws when dividing by 0
        // uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold
        return a / b;
    }

    /**
    * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
    */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        assert(b <= a);
        return a - b;
    }

    /**
    * @dev Adds two numbers, throws on overflow.
    */
    function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a + b;
        assert(c >= a);
        return c;
    }
}

// ORACLIZE_API
/*
Copyright (c) 2015-2016 Oraclize SRL
Copyright (c) 2016 Oraclize LTD



Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:



The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.



THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

//pragma solidity >=0.4.1 <=0.4.20;// Incompatible compiler version... please select one stated within pragma solidity or use different oraclizeAPI version

contract OraclizeI {
    address public cbAddress;

    function query(uint _timestamp, string _datasource, string _arg) payable returns (bytes32 _id);

    function query_withGasLimit(uint _timestamp, string _datasource, string _arg, uint _gaslimit) payable returns (bytes32 _id);

    function query2(uint _timestamp, string _datasource, string _arg1, string _arg2) payable returns (bytes32 _id);

    function query2_withGasLimit(uint _timestamp, string _datasource, string _arg1, string _arg2, uint _gaslimit) payable returns (bytes32 _id);

    function queryN(uint _timestamp, string _datasource, bytes _argN) payable returns (bytes32 _id);

    function queryN_withGasLimit(uint _timestamp, string _datasource, bytes _argN, uint _gaslimit) payable returns (bytes32 _id);

    function getPrice(string _datasource) returns (uint _dsprice);

    function getPrice(string _datasource, uint gaslimit) returns (uint _dsprice);

    function useCoupon(string _coupon);

    function setProofType(byte _proofType);

    function setConfig(bytes32 _config);

    function setCustomGasPrice(uint _gasPrice);

    function randomDS_getSessionPubKeyHash() returns (bytes32);
}

contract OraclizeAddrResolverI {
    function getAddress() returns (address _addr);
}

/*
Begin solidity-cborutils

https://github.com/smartcontractkit/solidity-cborutils

MIT License

Copyright (c) 2018 SmartContract ChainLink, Ltd.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
 */

library Buffer {
    struct buffer {
        bytes buf;
        uint capacity;
    }

    function init(buffer memory buf, uint capacity) internal constant {
        if (capacity % 32 != 0) capacity += 32 - (capacity % 32);
        // Allocate space for the buffer data
        buf.capacity = capacity;
        assembly {
            let ptr := mload(0x40)
            mstore(buf, ptr)
            mstore(0x40, add(ptr, capacity))
        }
    }

    function resize(buffer memory buf, uint capacity) private constant {
        bytes memory oldbuf = buf.buf;
        init(buf, capacity);
        append(buf, oldbuf);
    }

    function max(uint a, uint b) private constant returns (uint) {
        if (a > b) {
            return a;
        }
        return b;
    }

    /**
     * @dev Appends a byte array to the end of the buffer. Reverts if doing so
     *      would exceed the capacity of the buffer.
     * @param buf The buffer to append to.
     * @param data The data to append.
     * @return The original buffer.
     */
    function append(buffer memory buf, bytes data) internal constant returns (buffer memory) {
        if (data.length + buf.buf.length > buf.capacity) {
            resize(buf, max(buf.capacity, data.length) * 2);
        }

        uint dest;
        uint src;
        uint len = data.length;
        assembly {
        // Memory address of the buffer data
            let bufptr := mload(buf)
        // Length of existing buffer data
            let buflen := mload(bufptr)
        // Start address = buffer address + buffer length + sizeof(buffer length)
            dest := add(add(bufptr, buflen), 32)
        // Update buffer length
            mstore(bufptr, add(buflen, mload(data)))
            src := add(data, 32)
        }

        // Copy word-length chunks while possible
        for (; len >= 32; len -= 32) {
            assembly {
                mstore(dest, mload(src))
            }
            dest += 32;
            src += 32;
        }

        // Copy remaining bytes
        uint mask = 256 ** (32 - len) - 1;
        assembly {
            let srcpart := and(mload(src), not(mask))
            let destpart := and(mload(dest), mask)
            mstore(dest, or(destpart, srcpart))
        }

        return buf;
    }

    /**
     * @dev Appends a byte to the end of the buffer. Reverts if doing so would
     * exceed the capacity of the buffer.
     * @param buf The buffer to append to.
     * @param data The data to append.
     * @return The original buffer.
     */
    function append(buffer memory buf, uint8 data) internal constant {
        if (buf.buf.length + 1 > buf.capacity) {
            resize(buf, buf.capacity * 2);
        }

        assembly {
        // Memory address of the buffer data
            let bufptr := mload(buf)
        // Length of existing buffer data
            let buflen := mload(bufptr)
        // Address = buffer address + buffer length + sizeof(buffer length)
            let dest := add(add(bufptr, buflen), 32)
            mstore8(dest, data)
        // Update buffer length
            mstore(bufptr, add(buflen, 1))
        }
    }

    /**
     * @dev Appends a byte to the end of the buffer. Reverts if doing so would
     * exceed the capacity of the buffer.
     * @param buf The buffer to append to.
     * @param data The data to append.
     * @return The original buffer.
     */
    function appendInt(buffer memory buf, uint data, uint len) internal constant returns (buffer memory) {
        if (len + buf.buf.length > buf.capacity) {
            resize(buf, max(buf.capacity, len) * 2);
        }

        uint mask = 256 ** len - 1;
        assembly {
        // Memory address of the buffer data
            let bufptr := mload(buf)
        // Length of existing buffer data
            let buflen := mload(bufptr)
        // Address = buffer address + buffer length + sizeof(buffer length) + len
            let dest := add(add(bufptr, buflen), len)
            mstore(dest, or(and(mload(dest), not(mask)), data))
        // Update buffer length
            mstore(bufptr, add(buflen, len))
        }
        return buf;
    }
}

library CBOR {
    using Buffer for Buffer.buffer;

    uint8 private constant MAJOR_TYPE_INT = 0;
    uint8 private constant MAJOR_TYPE_NEGATIVE_INT = 1;
    uint8 private constant MAJOR_TYPE_BYTES = 2;
    uint8 private constant MAJOR_TYPE_STRING = 3;
    uint8 private constant MAJOR_TYPE_ARRAY = 4;
    uint8 private constant MAJOR_TYPE_MAP = 5;
    uint8 private constant MAJOR_TYPE_CONTENT_FREE = 7;

    function shl8(uint8 x, uint8 y) private constant returns (uint8) {
        return x * (2 ** y);
    }

    function encodeType(Buffer.buffer memory buf, uint8 major, uint value) private constant {
        if (value <= 23) {
            buf.append(uint8(shl8(major, 5) | value));
        } else if (value <= 0xFF) {
            buf.append(uint8(shl8(major, 5) | 24));
            buf.appendInt(value, 1);
        } else if (value <= 0xFFFF) {
            buf.append(uint8(shl8(major, 5) | 25));
            buf.appendInt(value, 2);
        } else if (value <= 0xFFFFFFFF) {
            buf.append(uint8(shl8(major, 5) | 26));
            buf.appendInt(value, 4);
        } else if (value <= 0xFFFFFFFFFFFFFFFF) {
            buf.append(uint8(shl8(major, 5) | 27));
            buf.appendInt(value, 8);
        }
    }

    function encodeIndefiniteLengthType(Buffer.buffer memory buf, uint8 major) private constant {
        buf.append(uint8(shl8(major, 5) | 31));
    }

    function encodeUInt(Buffer.buffer memory buf, uint value) internal constant {
        encodeType(buf, MAJOR_TYPE_INT, value);
    }

    function encodeInt(Buffer.buffer memory buf, int value) internal constant {
        if (value >= 0) {
            encodeType(buf, MAJOR_TYPE_INT, uint(value));
        } else {
            encodeType(buf, MAJOR_TYPE_NEGATIVE_INT, uint(- 1 - value));
        }
    }

    function encodeBytes(Buffer.buffer memory buf, bytes value) internal constant {
        encodeType(buf, MAJOR_TYPE_BYTES, value.length);
        buf.append(value);
    }

    function encodeString(Buffer.buffer memory buf, string value) internal constant {
        encodeType(buf, MAJOR_TYPE_STRING, bytes(value).length);
        buf.append(bytes(value));
    }

    function startArray(Buffer.buffer memory buf) internal constant {
        encodeIndefiniteLengthType(buf, MAJOR_TYPE_ARRAY);
    }

    function startMap(Buffer.buffer memory buf) internal constant {
        encodeIndefiniteLengthType(buf, MAJOR_TYPE_MAP);
    }

    function endSequence(Buffer.buffer memory buf) internal constant {
        encodeIndefiniteLengthType(buf, MAJOR_TYPE_CONTENT_FREE);
    }
}

/*
End solidity-cborutils
 */

contract usingOraclize {
    uint constant day = 60 * 60 * 24;
    uint constant week = 60 * 60 * 24 * 7;
    uint constant month = 60 * 60 * 24 * 30;
    byte constant proofType_NONE = 0x00;
    byte constant proofType_TLSNotary = 0x10;
    byte constant proofType_Android = 0x20;
    byte constant proofType_Ledger = 0x30;
    byte constant proofType_Native = 0xF0;
    byte constant proofStorage_IPFS = 0x01;
    uint8 constant networkID_auto = 0;
    uint8 constant networkID_mainnet = 1;
    uint8 constant networkID_testnet = 2;
    uint8 constant networkID_morden = 2;
    uint8 constant networkID_consensys = 161;

    OraclizeAddrResolverI OAR;

    OraclizeI oraclize;
    modifier oraclizeAPI {
        if ((address(OAR) == 0) || (getCodeSize(address(OAR)) == 0))
            oraclize_setNetwork(networkID_auto);

        if (address(oraclize) != OAR.getAddress())
            oraclize = OraclizeI(OAR.getAddress());

        _;
    }
    modifier coupon(string code){
        oraclize = OraclizeI(OAR.getAddress());
        oraclize.useCoupon(code);
        _;
    }

    function oraclize_setNetwork(uint8 networkID) internal returns (bool){
        if (getCodeSize(0x1d3B2638a7cC9f2CB3D298A3DA7a90B67E5506ed) > 0) {//mainnet
            OAR = OraclizeAddrResolverI(0x1d3B2638a7cC9f2CB3D298A3DA7a90B67E5506ed);
            oraclize_setNetworkName("eth_mainnet");
            return true;
        }
        if (getCodeSize(0xc03A2615D5efaf5F49F60B7BB6583eaec212fdf1) > 0) {//ropsten testnet
            OAR = OraclizeAddrResolverI(0xc03A2615D5efaf5F49F60B7BB6583eaec212fdf1);
            oraclize_setNetworkName("eth_ropsten3");
            return true;
        }
        if (getCodeSize(0xB7A07BcF2Ba2f2703b24C0691b5278999C59AC7e) > 0) {//kovan testnet
            OAR = OraclizeAddrResolverI(0xB7A07BcF2Ba2f2703b24C0691b5278999C59AC7e);
            oraclize_setNetworkName("eth_kovan");
            return true;
        }
        if (getCodeSize(0x146500cfd35B22E4A392Fe0aDc06De1a1368Ed48) > 0) {//rinkeby testnet
            OAR = OraclizeAddrResolverI(0x146500cfd35B22E4A392Fe0aDc06De1a1368Ed48);
            oraclize_setNetworkName("eth_rinkeby");
            return true;
        }
        if (getCodeSize(0x6f485C8BF6fc43eA212E93BBF8ce046C7f1cb475) > 0) {//ethereum-bridge
            OAR = OraclizeAddrResolverI(0x6f485C8BF6fc43eA212E93BBF8ce046C7f1cb475);
            return true;
        }
        if (getCodeSize(0x20e12A1F859B3FeaE5Fb2A0A32C18F5a65555bBF) > 0) {//ether.camp ide
            OAR = OraclizeAddrResolverI(0x20e12A1F859B3FeaE5Fb2A0A32C18F5a65555bBF);
            return true;
        }
        if (getCodeSize(0x51efaF4c8B3C9AfBD5aB9F4bbC82784Ab6ef8fAA) > 0) {//browser-solidity
            OAR = OraclizeAddrResolverI(0x51efaF4c8B3C9AfBD5aB9F4bbC82784Ab6ef8fAA);
            return true;
        }
        return false;
    }

    function __callback(bytes32 myid, string result) {
        __callback(myid, result, new bytes(0));
    }

    function __callback(bytes32 myid, string result, bytes proof) {
    }

    function oraclize_useCoupon(string code) oraclizeAPI internal {
        oraclize.useCoupon(code);
    }

    function oraclize_getPrice(string datasource) oraclizeAPI internal returns (uint){
        return oraclize.getPrice(datasource);
    }

    function oraclize_getPrice(string datasource, uint gaslimit) oraclizeAPI internal returns (uint){
        return oraclize.getPrice(datasource, gaslimit);
    }

    function oraclize_query(string datasource, string arg) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        return oraclize.query.value(price)(0, datasource, arg);
    }

    function oraclize_query(uint timestamp, string datasource, string arg) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        return oraclize.query.value(price)(timestamp, datasource, arg);
    }

    function oraclize_query(uint timestamp, string datasource, string arg, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        return oraclize.query_withGasLimit.value(price)(timestamp, datasource, arg, gaslimit);
    }

    function oraclize_query(string datasource, string arg, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        return oraclize.query_withGasLimit.value(price)(0, datasource, arg, gaslimit);
    }

    function oraclize_query(string datasource, string arg1, string arg2) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        return oraclize.query2.value(price)(0, datasource, arg1, arg2);
    }

    function oraclize_query(uint timestamp, string datasource, string arg1, string arg2) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        return oraclize.query2.value(price)(timestamp, datasource, arg1, arg2);
    }

    function oraclize_query(uint timestamp, string datasource, string arg1, string arg2, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        return oraclize.query2_withGasLimit.value(price)(timestamp, datasource, arg1, arg2, gaslimit);
    }

    function oraclize_query(string datasource, string arg1, string arg2, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        return oraclize.query2_withGasLimit.value(price)(0, datasource, arg1, arg2, gaslimit);
    }

    function oraclize_query(string datasource, string[] argN) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        bytes memory args = stra2cbor(argN);
        return oraclize.queryN.value(price)(0, datasource, args);
    }

    function oraclize_query(uint timestamp, string datasource, string[] argN) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        bytes memory args = stra2cbor(argN);
        return oraclize.queryN.value(price)(timestamp, datasource, args);
    }

    function oraclize_query(uint timestamp, string datasource, string[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        bytes memory args = stra2cbor(argN);
        return oraclize.queryN_withGasLimit.value(price)(timestamp, datasource, args, gaslimit);
    }

    function oraclize_query(string datasource, string[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        bytes memory args = stra2cbor(argN);
        return oraclize.queryN_withGasLimit.value(price)(0, datasource, args, gaslimit);
    }

    function oraclize_query(string datasource, string[1] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](1);
        dynargs[0] = args[0];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[1] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](1);
        dynargs[0] = args[0];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](1);
        dynargs[0] = args[0];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](1);
        dynargs[0] = args[0];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[2] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[2] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[3] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[3] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[4] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[4] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[5] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[5] args) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, string[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, string[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        string[] memory dynargs = new string[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[] argN) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        bytes memory args = ba2cbor(argN);
        return oraclize.queryN.value(price)(0, datasource, args);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[] argN) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource);
        if (price > 1 ether + tx.gasprice * 200000) return 0;
        // unexpectedly high price
        bytes memory args = ba2cbor(argN);
        return oraclize.queryN.value(price)(timestamp, datasource, args);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        bytes memory args = ba2cbor(argN);
        return oraclize.queryN_withGasLimit.value(price)(timestamp, datasource, args, gaslimit);
    }

    function oraclize_query(string datasource, bytes[] argN, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        uint price = oraclize.getPrice(datasource, gaslimit);
        if (price > 1 ether + tx.gasprice * gaslimit) return 0;
        // unexpectedly high price
        bytes memory args = ba2cbor(argN);
        return oraclize.queryN_withGasLimit.value(price)(0, datasource, args, gaslimit);
    }

    function oraclize_query(string datasource, bytes[1] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](1);
        dynargs[0] = args[0];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[1] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](1);
        dynargs[0] = args[0];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](1);
        dynargs[0] = args[0];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[1] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](1);
        dynargs[0] = args[0];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[2] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[2] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[2] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](2);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[3] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[3] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[3] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](3);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[4] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[4] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[4] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](4);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[5] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[5] args) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(timestamp, datasource, dynargs);
    }

    function oraclize_query(uint timestamp, string datasource, bytes[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(timestamp, datasource, dynargs, gaslimit);
    }

    function oraclize_query(string datasource, bytes[5] args, uint gaslimit) oraclizeAPI internal returns (bytes32 id) {
        bytes[] memory dynargs = new bytes[](5);
        dynargs[0] = args[0];
        dynargs[1] = args[1];
        dynargs[2] = args[2];
        dynargs[3] = args[3];
        dynargs[4] = args[4];
        return oraclize_query(datasource, dynargs, gaslimit);
    }

    function oraclize_cbAddress() oraclizeAPI internal returns (address){
        return oraclize.cbAddress();
    }

    function oraclize_setProof(byte proofP) oraclizeAPI internal {
        return oraclize.setProofType(proofP);
    }

    function oraclize_setCustomGasPrice(uint gasPrice) oraclizeAPI internal {
        return oraclize.setCustomGasPrice(gasPrice);
    }

    function oraclize_setConfig(bytes32 config) oraclizeAPI internal {
        return oraclize.setConfig(config);
    }

    function oraclize_randomDS_getSessionPubKeyHash() oraclizeAPI internal returns (bytes32){
        return oraclize.randomDS_getSessionPubKeyHash();
    }

    function getCodeSize(address _addr) constant internal returns (uint _size) {
        assembly {
            _size := extcodesize(_addr)
        }
    }

    function parseAddr(string _a) internal returns (address){
        bytes memory tmp = bytes(_a);
        uint160 iaddr = 0;
        uint160 b1;
        uint160 b2;
        for (uint i = 2; i < 2 + 2 * 20; i += 2) {
            iaddr *= 256;
            b1 = uint160(tmp[i]);
            b2 = uint160(tmp[i + 1]);
            if ((b1 >= 97) && (b1 <= 102)) b1 -= 87;
            else if ((b1 >= 65) && (b1 <= 70)) b1 -= 55;
            else if ((b1 >= 48) && (b1 <= 57)) b1 -= 48;
            if ((b2 >= 97) && (b2 <= 102)) b2 -= 87;
            else if ((b2 >= 65) && (b2 <= 70)) b2 -= 55;
            else if ((b2 >= 48) && (b2 <= 57)) b2 -= 48;
            iaddr += (b1 * 16 + b2);
        }
        return address(iaddr);
    }

    function strCompare(string _a, string _b) internal returns (int) {
        bytes memory a = bytes(_a);
        bytes memory b = bytes(_b);
        uint minLength = a.length;
        if (b.length < minLength) minLength = b.length;
        for (uint i = 0; i < minLength; i ++)
            if (a[i] < b[i])
                return - 1;
            else if (a[i] > b[i])
                return 1;
        if (a.length < b.length)
            return - 1;
        else if (a.length > b.length)
            return 1;
        else
            return 0;
    }

    function indexOf(string _haystack, string _needle) internal returns (int) {
        bytes memory h = bytes(_haystack);
        bytes memory n = bytes(_needle);
        if (h.length < 1 || n.length < 1 || (n.length > h.length))
            return - 1;
        else if (h.length > (2 ** 128 - 1))
            return - 1;
        else
        {
            uint subindex = 0;
            for (uint i = 0; i < h.length; i ++)
            {
                if (h[i] == n[0])
                {
                    subindex = 1;
                    while (subindex < n.length && (i + subindex) < h.length && h[i + subindex] == n[subindex])
                    {
                        subindex++;
                    }
                    if (subindex == n.length)
                        return int(i);
                }
            }
            return - 1;
        }
    }

    function strConcat(string _a, string _b, string _c, string _d, string _e) internal returns (string) {
        bytes memory _ba = bytes(_a);
        bytes memory _bb = bytes(_b);
        bytes memory _bc = bytes(_c);
        bytes memory _bd = bytes(_d);
        bytes memory _be = bytes(_e);
        string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length);
        bytes memory babcde = bytes(abcde);
        uint k = 0;
        for (uint i = 0; i < _ba.length; i++) babcde[k++] = _ba[i];
        for (i = 0; i < _bb.length; i++) babcde[k++] = _bb[i];
        for (i = 0; i < _bc.length; i++) babcde[k++] = _bc[i];
        for (i = 0; i < _bd.length; i++) babcde[k++] = _bd[i];
        for (i = 0; i < _be.length; i++) babcde[k++] = _be[i];
        return string(babcde);
    }

    function strConcat(string _a, string _b, string _c, string _d) internal returns (string) {
        return strConcat(_a, _b, _c, _d, "");
    }

    function strConcat(string _a, string _b, string _c) internal returns (string) {
        return strConcat(_a, _b, _c, "", "");
    }

    function strConcat(string _a, string _b) internal returns (string) {
        return strConcat(_a, _b, "", "", "");
    }

    // parseInt
    function parseInt(string _a) internal returns (uint) {
        return parseInt(_a, 0);
    }

    // parseInt(parseFloat*10^_b)
    function parseInt(string _a, uint _b) internal returns (uint) {
        bytes memory bresult = bytes(_a);
        uint mint = 0;
        bool decimals = false;
        for (uint i = 0; i < bresult.length; i++) {
            if ((bresult[i] >= 48) && (bresult[i] <= 57)) {
                if (decimals) {
                    if (_b == 0) break;
                    else _b--;
                }
                mint *= 10;
                mint += uint(bresult[i]) - 48;
            } else if (bresult[i] == 46) decimals = true;
        }
        if (_b > 0) mint *= 10 ** _b;
        return mint;
    }

    function uint2str(uint i) internal returns (string){
        if (i == 0) return "0";
        uint j = i;
        uint len;
        while (j != 0) {
            len++;
            j /= 10;
        }
        bytes memory bstr = new bytes(len);
        uint k = len - 1;
        while (i != 0) {
            bstr[k--] = byte(48 + i % 10);
            i /= 10;
        }
        return string(bstr);
    }

    using CBOR for Buffer.buffer;
    function stra2cbor(string[] arr) internal constant returns (bytes) {
        Buffer.buffer memory buf;
        Buffer.init(buf, 1024);
        buf.startArray();
        for (uint i = 0; i < arr.length; i++) {
            buf.encodeString(arr[i]);
        }
        buf.endSequence();
        return buf.buf;
    }

    function ba2cbor(bytes[] arr) internal constant returns (bytes) {
        Buffer.buffer memory buf;
        Buffer.init(buf, 1024);
        buf.startArray();
        for (uint i = 0; i < arr.length; i++) {
            buf.encodeBytes(arr[i]);
        }
        buf.endSequence();
        return buf.buf;
    }

    string oraclize_network_name;

    function oraclize_setNetworkName(string _network_name) internal {
        oraclize_network_name = _network_name;
    }

    function oraclize_getNetworkName() internal returns (string) {
        return oraclize_network_name;
    }

    function oraclize_newRandomDSQuery(uint _delay, uint _nbytes, uint _customGasLimit) internal returns (bytes32){
        if ((_nbytes == 0) || (_nbytes > 32)) throw;
        // Convert from seconds to ledger timer ticks
        _delay *= 10;
        bytes memory nbytes = new bytes(1);
        nbytes[0] = byte(_nbytes);
        bytes memory unonce = new bytes(32);
        bytes memory sessionKeyHash = new bytes(32);
        bytes32 sessionKeyHash_bytes32 = oraclize_randomDS_getSessionPubKeyHash();
        assembly {
            mstore(unonce, 0x20)
            mstore(add(unonce, 0x20), xor(blockhash(sub(number, 1)), xor(coinbase, timestamp)))
            mstore(sessionKeyHash, 0x20)
            mstore(add(sessionKeyHash, 0x20), sessionKeyHash_bytes32)
        }
        bytes memory delay = new bytes(32);
        assembly {
            mstore(add(delay, 0x20), _delay)
        }

        bytes memory delay_bytes8 = new bytes(8);
        copyBytes(delay, 24, 8, delay_bytes8, 0);

        bytes[4] memory args = [unonce, nbytes, sessionKeyHash, delay];
        bytes32 queryId = oraclize_query("random", args, _customGasLimit);

        bytes memory delay_bytes8_left = new bytes(8);

        assembly {
            let x := mload(add(delay_bytes8, 0x20))
            mstore8(add(delay_bytes8_left, 0x27), div(x, 0x100000000000000000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x26), div(x, 0x1000000000000000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x25), div(x, 0x10000000000000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x24), div(x, 0x100000000000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x23), div(x, 0x1000000000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x22), div(x, 0x10000000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x21), div(x, 0x100000000000000000000000000000000000000000000000000))
            mstore8(add(delay_bytes8_left, 0x20), div(x, 0x1000000000000000000000000000000000000000000000000))

        }

        oraclize_randomDS_setCommitment(queryId, sha3(delay_bytes8_left, args[1], sha256(args[0]), args[2]));
        return queryId;
    }

    function oraclize_randomDS_setCommitment(bytes32 queryId, bytes32 commitment) internal {
        oraclize_randomDS_args[queryId] = commitment;
    }

    mapping(bytes32 => bytes32) oraclize_randomDS_args;
    mapping(bytes32 => bool) oraclize_randomDS_sessionKeysHashVerified;

    function verifySig(bytes32 tosignh, bytes dersig, bytes pubkey) internal returns (bool){
        bool sigok;
        address signer;

        bytes32 sigr;
        bytes32 sigs;

        bytes memory sigr_ = new bytes(32);
        uint offset = 4 + (uint(dersig[3]) - 0x20);
        sigr_ = copyBytes(dersig, offset, 32, sigr_, 0);
        bytes memory sigs_ = new bytes(32);
        offset += 32 + 2;
        sigs_ = copyBytes(dersig, offset + (uint(dersig[offset - 1]) - 0x20), 32, sigs_, 0);

        assembly {
            sigr := mload(add(sigr_, 32))
            sigs := mload(add(sigs_, 32))
        }


        (sigok, signer) = safer_ecrecover(tosignh, 27, sigr, sigs);
        if (address(sha3(pubkey)) == signer) return true;
        else {
            (sigok, signer) = safer_ecrecover(tosignh, 28, sigr, sigs);
            return (address(sha3(pubkey)) == signer);
        }
    }

    function oraclize_randomDS_proofVerify__sessionKeyValidity(bytes proof, uint sig2offset) internal returns (bool) {
        bool sigok;

        // Step 6: verify the attestation signature, APPKEY1 must sign the sessionKey from the correct ledger app (CODEHASH)
        bytes memory sig2 = new bytes(uint(proof[sig2offset + 1]) + 2);
        copyBytes(proof, sig2offset, sig2.length, sig2, 0);

        bytes memory appkey1_pubkey = new bytes(64);
        copyBytes(proof, 3 + 1, 64, appkey1_pubkey, 0);

        bytes memory tosign2 = new bytes(1 + 65 + 32);
        tosign2[0] = 1;
        //role
        copyBytes(proof, sig2offset - 65, 65, tosign2, 1);
        bytes memory CODEHASH = hex"fd94fa71bc0ba10d39d464d0d8f465efeef0a2764e3887fcc9df41ded20f505c";
        copyBytes(CODEHASH, 0, 32, tosign2, 1 + 65);
        sigok = verifySig(sha256(tosign2), sig2, appkey1_pubkey);

        if (sigok == false) return false;


        // Step 7: verify the APPKEY1 provenance (must be signed by Ledger)
        bytes memory LEDGERKEY = hex"7fb956469c5c9b89840d55b43537e66a98dd4811ea0a27224272c2e5622911e8537a2f8e86a46baec82864e98dd01e9ccc2f8bc5dfc9cbe5a91a290498dd96e4";

        bytes memory tosign3 = new bytes(1 + 65);
        tosign3[0] = 0xFE;
        copyBytes(proof, 3, 65, tosign3, 1);

        bytes memory sig3 = new bytes(uint(proof[3 + 65 + 1]) + 2);
        copyBytes(proof, 3 + 65, sig3.length, sig3, 0);

        sigok = verifySig(sha256(tosign3), sig3, LEDGERKEY);

        return sigok;
    }

    modifier oraclize_randomDS_proofVerify(bytes32 _queryId, string _result, bytes _proof) {
        // Step 1: the prefix has to match 'LP\x01' (Ledger Proof version 1)
        if ((_proof[0] != "L") || (_proof[1] != "P") || (_proof[2] != 1)) throw;

        bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName());
        if (proofVerified == false) throw;

        _;
    }

    function oraclize_randomDS_proofVerify__returnCode(bytes32 _queryId, string _result, bytes _proof) internal returns (uint8){
        // Step 1: the prefix has to match 'LP\x01' (Ledger Proof version 1)
        if ((_proof[0] != "L") || (_proof[1] != "P") || (_proof[2] != 1)) return 1;

        bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName());
        if (proofVerified == false) return 2;

        return 0;
    }

    function matchBytes32Prefix(bytes32 content, bytes prefix, uint n_random_bytes) internal returns (bool){
        bool match_ = true;

        if (prefix.length != n_random_bytes) throw;

        for (uint256 i = 0; i < n_random_bytes; i++) {
            if (content[i] != prefix[i]) match_ = false;
        }

        return match_;
    }

    function oraclize_randomDS_proofVerify__main(bytes proof, bytes32 queryId, bytes result, string context_name) internal returns (bool){

        // Step 2: the unique keyhash has to match with the sha256 of (context name + queryId)
        uint ledgerProofLength = 3 + 65 + (uint(proof[3 + 65 + 1]) + 2) + 32;
        bytes memory keyhash = new bytes(32);
        copyBytes(proof, ledgerProofLength, 32, keyhash, 0);
        if (!(sha3(keyhash) == sha3(sha256(context_name, queryId)))) return false;

        bytes memory sig1 = new bytes(uint(proof[ledgerProofLength + (32 + 8 + 1 + 32) + 1]) + 2);
        copyBytes(proof, ledgerProofLength + (32 + 8 + 1 + 32), sig1.length, sig1, 0);

        // Step 3: we assume sig1 is valid (it will be verified during step 5) and we verify if 'result' is the prefix of sha256(sig1)
        if (!matchBytes32Prefix(sha256(sig1), result, uint(proof[ledgerProofLength + 32 + 8]))) return false;

        // Step 4: commitment match verification, sha3(delay, nbytes, unonce, sessionKeyHash) == commitment in storage.
        // This is to verify that the computed args match with the ones specified in the query.
        bytes memory commitmentSlice1 = new bytes(8 + 1 + 32);
        copyBytes(proof, ledgerProofLength + 32, 8 + 1 + 32, commitmentSlice1, 0);

        bytes memory sessionPubkey = new bytes(64);
        uint sig2offset = ledgerProofLength + 32 + (8 + 1 + 32) + sig1.length + 65;
        copyBytes(proof, sig2offset - 64, 64, sessionPubkey, 0);

        bytes32 sessionPubkeyHash = sha256(sessionPubkey);
        if (oraclize_randomDS_args[queryId] == sha3(commitmentSlice1, sessionPubkeyHash)) {//unonce, nbytes and sessionKeyHash match
            delete oraclize_randomDS_args[queryId];
        } else return false;


        // Step 5: validity verification for sig1 (keyhash and args signed with the sessionKey)
        bytes memory tosign1 = new bytes(32 + 8 + 1 + 32);
        copyBytes(proof, ledgerProofLength, 32 + 8 + 1 + 32, tosign1, 0);
        if (!verifySig(sha256(tosign1), sig1, sessionPubkey)) return false;

        // verify if sessionPubkeyHash was verified already, if not.. let's do it!
        if (oraclize_randomDS_sessionKeysHashVerified[sessionPubkeyHash] == false) {
            oraclize_randomDS_sessionKeysHashVerified[sessionPubkeyHash] = oraclize_randomDS_proofVerify__sessionKeyValidity(proof, sig2offset);
        }

        return oraclize_randomDS_sessionKeysHashVerified[sessionPubkeyHash];
    }


    // the following function has been written by Alex Beregszaszi (@axic), use it under the terms of the MIT license
    function copyBytes(bytes from, uint fromOffset, uint length, bytes to, uint toOffset) internal returns (bytes) {
        uint minLength = length + toOffset;

        if (to.length < minLength) {
            // Buffer too small
            throw;
            // Should be a better way?
        }

        // NOTE: the offset 32 is added to skip the `size` field of both bytes variables
        uint i = 32 + fromOffset;
        uint j = 32 + toOffset;

        while (i < (32 + fromOffset + length)) {
            assembly {
                let tmp := mload(add(from, i))
                mstore(add(to, j), tmp)
            }
            i += 32;
            j += 32;
        }

        return to;
    }

    // the following function has been written by Alex Beregszaszi (@axic), use it under the terms of the MIT license
    // Duplicate Solidity's ecrecover, but catching the CALL return value
    function safer_ecrecover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal returns (bool, address) {
        // We do our own memory management here. Solidity uses memory offset
        // 0x40 to store the current end of memory. We write past it (as
        // writes are memory extensions), but don't update the offset so
        // Solidity will reuse it. The memory used here is only needed for
        // this context.

        // FIXME: inline assembly can't access return values
        bool ret;
        address addr;

        assembly {
            let size := mload(0x40)
            mstore(size, hash)
            mstore(add(size, 32), v)
            mstore(add(size, 64), r)
            mstore(add(size, 96), s)

        // NOTE: we can reuse the request memory because we deal with
        //       the return code
            ret := call(3000, 1, 0, size, 128, size, 32)
            addr := mload(size)
        }

        return (ret, addr);
    }

    // the following function has been written by Alex Beregszaszi (@axic), use it under the terms of the MIT license
    function ecrecovery(bytes32 hash, bytes sig) internal returns (bool, address) {
        bytes32 r;
        bytes32 s;
        uint8 v;

        if (sig.length != 65)
            return (false, 0);

        // The signature format is a compact form of:
        //   {bytes32 r}{bytes32 s}{uint8 v}
        // Compact means, uint8 is not padded to 32 bytes.
        assembly {
            r := mload(add(sig, 32))
            s := mload(add(sig, 64))

        // Here we are loading the last 32 bytes. We exploit the fact that
        // 'mload' will pad with zeroes if we overread.
        // There is no 'mload8' to do this, but that would be nicer.
            v := byte(0, mload(add(sig, 96)))

        // Alternative solution:
        // 'byte' is not working due to the Solidity parser, so lets
        // use the second best option, 'and'
        // v := and(mload(add(sig, 65)), 255)
        }

        // albeit non-transactional signatures are not specified by the YP, one would expect it
        // to match the YP range of [27, 28]
        //
        // geth uses [0, 1] and some clients have followed. This might change, see:
        //  https://github.com/ethereum/go-ethereum/issues/2053
        if (v < 27)
            v += 27;

        if (v != 27 && v != 28)
            return (false, 0);

        return safer_ecrecover(hash, v, r, s);
    }

}
// end of ORACLIZE_API

// =============== Lucky Strike ========================================================================================

contract LuckyStrikeTokens {

    function totalSupply() constant returns (uint256);

    function balanceOf(address _owner) constant returns (uint256);

    function mint(address to, uint256 value, uint256 _invest) public returns (bool);

    function tokenSaleIsRunning() public returns (bool);

    function transferIncome() public payable;
}

contract LuckyStrike is usingOraclize {

    /* --- see: https://github.com/oraclize/ethereum-examples/blob/master/solidity/random-datasource/randomExample.sol */

    // see: https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/token/ERC20/BasicToken.sol
    using SafeMath for uint256;
    using SafeMath for uint16;

    address public owner;
    address admin;
    // TODO: change in production <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
    //    uint256 public ticketPriceInWei = 200000000000000; // (0.02 ETH / 100)
    //    uint256 public tokenPriceInWei = 1500000000000; //    (0.00015 ETH / 100)
    uint256 public ticketPriceInWei = 20000000000000000; // 0.02 ETH
    uint256 public tokenPriceInWei = 150000000000000; //    0.00015 ETH
    // TODO: end change in production <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

    uint16 public maxTicketsToBuyInOneTransaction = 333; //
    //
    uint256 public eventsCounter;
    //
    mapping(uint256 => address) public theLotteryTicket;
    mapping(address => uint256) public playerTicketsTotal;
    uint256 public ticketsTotal;
    //
    address public kingOfTheHill;
    uint256 public kingOfTheHillTicketsNumber;

    mapping(address => uint256) public reward;

    event rewardPaid(uint256 indexed eventsCounter, address indexed to, uint256 sum); //
    function getReward() public {
        require(reward[msg.sender] > 0);
        msg.sender.transfer(reward[msg.sender]);

        eventsCounter = eventsCounter + 1;
        rewardPaid(eventsCounter, msg.sender, reward[msg.sender]);
        sum[affiliateRewards] = sum[affiliateRewards].sub(reward[msg.sender]);
        reward[msg.sender] = 0;
    }

    // gas for oraclize_query:
    uint256 public oraclizeCallbackGas = 1000000; // amount of gas we want Oraclize to set for the callback function
    function changeOraclizeCallbackGas(uint _oraclizeCallbackGas) returns (bool result){
        require(msg.sender == owner);
        oraclizeCallbackGas = _oraclizeCallbackGas;
        return true;
    }

    // > to be able to read it from browser after updating
    uint256 public currentOraclizeGasPrice; //
    function oraclizeGetPrice() public returns (uint256){
        currentOraclizeGasPrice = oraclize_getPrice("random", oraclizeCallbackGas);
        return currentOraclizeGasPrice;
    }

    function getContractsWeiBalance() public view returns (uint256) {
        return this.balance;
    }

    // mapping to keep sums on accounts (including 'income'):
    mapping(uint8 => uint256) public sum;
    uint8 public instantGame = 0;
    uint8 public dailyJackpot = 1;
    uint8 public weeklyJackpot = 2;
    uint8 public monthlyJackpot = 3;
    uint8 public yearlyJackpot = 4;
    uint8 public income = 5;
    uint8 public marketingFund = 6;
    uint8 public affiliateRewards = 7; //
    uint8 public playersBets = 8;

    mapping(uint8 => uint256) public period; // in seconds

    event withdrawalFromMarketingFund(uint256 indexed eventsCounter, uint256 sum); //
    function withdrawFromMarketingFund() public {
        require(msg.sender == owner);
        owner.transfer(sum[marketingFund]);

        eventsCounter = eventsCounter + 1;
        withdrawalFromMarketingFund(eventsCounter, sum[marketingFund]);

        sum[marketingFund] = 0;
    }

    mapping(uint8 => bool) public jackpotPlayIsRunning; //

    /*
    * contains number of block in which jackpot play was started last time;
    */
    mapping(uint8 => uint256) public jackpotPlayLastTimeStartedFromBlock;

    // allocation:
    mapping(uint8 => uint16) public rate;

    // JackpotCounters (starts with 0):
    mapping(uint8 => uint256) jackpotCounter;
    mapping(uint8 => uint256) public lastJackpotTime;  // unix time

    address public luckyStrikeTokensContractAddress;

    LuckyStrikeTokens public luckyStrikeTokens;

    /* --- constructor */

    // (!) requires access to Oraclize contract
    // will fail on JavaScript VM
    function LuckyStrike() public {

        admin = msg.sender;

        // sets the Ledger authenticity proof in the constructor
        oraclize_setProof(proofType_Ledger);

    }

    function init(address _luckyStrikeTokensContractAddress) public payable {

        require(ticketsTotal == 0);
        require(_luckyStrikeTokensContractAddress != address(0));
        require(msg.sender == admin);

        // TODO: <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< change in production
        owner = 0x0bBAb60c495413c870F8cABF09436BeE9fe3542F;
        //        owner = admin;

        require(msg.value / ticketPriceInWei >= 1);

        luckyStrikeTokensContractAddress = _luckyStrikeTokensContractAddress;

        // should be updated every time we use it
        // now we just get value to show in webapp
        oraclizeGetPrice();

        kingOfTheHill = msg.sender;
        ticketsTotal = kingOfTheHillTicketsNumber = 1;
        theLotteryTicket[1] = kingOfTheHill;

        // initialize jackpot periods
        // see: https://solidity.readthedocs.io/en/v0.4.20/units-and-global-variables.html#time-units
        period[dailyJackpot] = 1 days;
        period[weeklyJackpot] = 1 weeks;
        period[monthlyJackpot] = 30 days;
        period[yearlyJackpot] = 1 years;

        // for testing: TODO change dev mode to production mode<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
        //        period[dailyJackpot] = 60 * 1;
        //        period[weeklyJackpot] = 60 * 3;
        //        period[monthlyJackpot] = 60 * 5;
        //        period[yearlyJackpot] = 60 * 7;
        // TODO: end of test data block <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

        // set last block numbers and timestamps for jackpots:
        for (uint8 i = dailyJackpot; i <= yearlyJackpot; i++) {
            lastJackpotTime[i] = block.timestamp;
        }

        rate[instantGame] = 8500;
        rate[dailyJackpot] = 500;
        rate[weeklyJackpot] = 300;
        rate[monthlyJackpot] = 100;
        rate[yearlyJackpot] = 100;
        rate[income] = 500;

        luckyStrikeTokens = LuckyStrikeTokens(luckyStrikeTokensContractAddress);

    }

    /* --- Tokens contract information   */
    function tokensTotalSupply() public view returns (uint256) {
        return luckyStrikeTokens.totalSupply();
    }

    function tokensBalanceOf(address acc) public view returns (uint256){
        return luckyStrikeTokens.balanceOf(acc);
    }

    function weiInTokensContract() public view returns (uint256){
        return luckyStrikeTokens.balance;
    }

    function tokenSaleIsRunning() public view returns (bool) {
        return luckyStrikeTokens.tokenSaleIsRunning();
    }

    event AllocationAdjusted(
        uint256 indexed eventsCounter,
        address by,
        uint16 instantGame,
        uint16 dailyJackpot,
        uint16 weeklyJackpot,
        uint16 monthlyJackpot,
        uint16 yearlyJackpot,
        uint16 income);

    function adjustAllocation(
        uint16 _instantGame,
        uint16 _dailyJackpot,
        uint16 _weeklyJackpot,
        uint16 _monthlyJackpot,
        uint16 _yearlyJackpot,
        uint16 _income) public {

        // only owner !!!
        require(msg.sender == owner);

        rate[instantGame] = _instantGame;
        rate[dailyJackpot] = _dailyJackpot;
        rate[weeklyJackpot] = _weeklyJackpot;
        rate[monthlyJackpot] = _monthlyJackpot;
        rate[yearlyJackpot] = _yearlyJackpot;
        rate[income] = _income;

        // check if provided %% amount to 10,000
        uint16 _sum = 0;
        for (uint8 i = instantGame; i <= income; i++) {
            _sum = _sum + rate[i];
        }

        require(_sum == 10000);

        eventsCounter = eventsCounter + 1;
        AllocationAdjusted(
            eventsCounter,
            msg.sender,
            rate[instantGame],
            rate[dailyJackpot],
            rate[weeklyJackpot],
            rate[monthlyJackpot],
            rate[yearlyJackpot],
            rate[income]
        );

    } // end of adjustAllocation

    // this function calculates jackpots/income allocation and returns prize for the instant game
    uint256 sumAllocatedInWeiCounter;

    event SumAllocatedInWei(
        uint256 indexed eventsCounter,
        uint256 indexed sumAllocatedInWeiCounter,
        address betOf,
        uint256 bet, // 0
        uint256 dailyJackpot, // 1
        uint256 weeklyJackpot, // 2;
        uint256 monthlyJackpot, // 3;
        uint256 yearlyJackpot, // 4;
        uint256 income,
        uint256 affiliateRewards,
        uint256 payToWinner,
        bool sumValidationPassed
    );

    function allocateSum(uint256 _sum, address loser) private returns (uint256) {

        // for event
        // https://solidity.readthedocs.io/en/v0.4.24/types.html#allocating-memory-arrays
        uint256[] memory jackpotsSumAllocation = new uint256[](5);

        // jackpots:
        for (uint8 i = dailyJackpot; i <= yearlyJackpot; i++) {
            // uint256 sumToAdd = _sum * rate[i] / 10000;
            uint256 sumToAdd = _sum.mul(rate[i]).div(10000);
            sum[i] = sum[i].add(sumToAdd);
            // for event:
            jackpotsSumAllocation[i] = sumToAdd;
        }

        // income before affiliate reward subtraction:
        // uint256 incomeSum = (_sum * rate[income]) / 10000;
        uint256 incomeSum = _sum.mul(rate[income]).div(10000);
        // referrer reward:
        uint256 refSum = 0;
        if (referrer[loser] != address(0)) {

            address referrerAddress = referrer[loser];

            refSum = incomeSum / 2;
            incomeSum = incomeSum.sub(refSum);

            reward[referrerAddress] = reward[referrerAddress].add(refSum);

            sum[affiliateRewards] = sum[affiliateRewards].add(refSum);
        }

        sum[income] = sum[income].add(incomeSum);

        // uint256 payToWinner = _sum * rate[instantGame] / 10000;
        uint256 payToWinner = _sum.mul(rate[instantGame]).div(10000);

        bool sumValidationPassed = false;
        if (
            (jackpotsSumAllocation[1] +
            jackpotsSumAllocation[2] +
            jackpotsSumAllocation[3] +
            jackpotsSumAllocation[4] +
            incomeSum +
            refSum +
            payToWinner) == _sum) {
            sumValidationPassed = true;
        }

        eventsCounter = eventsCounter + 1;
        sumAllocatedInWeiCounter = sumAllocatedInWeiCounter + 1;
        SumAllocatedInWei(
            eventsCounter,
            sumAllocatedInWeiCounter,
            loser,
            _sum,
            jackpotsSumAllocation[1], //  dailyJackpot
            jackpotsSumAllocation[2], // weeklyJackpot
            jackpotsSumAllocation[3], // monthlyJackpot
            jackpotsSumAllocation[4], //  yearlyJackpot
            incomeSum,
            refSum,
            payToWinner,
            sumValidationPassed
        );

        return payToWinner;
    }

    /* -------------- GAME: --------------*/

    /* --- Instant Game ------- */
    uint256 public instantGameCounter; // id's of instant games
    //
    // to allow only one game for the given address simultaneously:
    mapping(address => bool) public instantGameIsRunning;
    //
    mapping(address => uint256) public lastInstantGameBlockNumber; // for address
    mapping(address => uint256) public lastInstantGameTicketsNumber; // for address

    // first step for player is to make a bet:
    uint256 public betCounter;
    uint256 public lastUnplayedBet;
    mapping(uint256 => address) public playerByBet;

    event BetPlaced(
        uint256 indexed eventsCounter, // 0
        uint256 indexed betCounter, // 1
        address indexed player, // 2
        uint256 betInWei, // 3
        uint256 ticketsBefore, // 4
        uint256 newTickets // 5
    );

    function placeABetInternal(uint value) private {

        require(msg.sender != kingOfTheHill);

        // only one game allowed for the address at the given moment:
        require(!instantGameIsRunning[msg.sender]);

        if (lastUnplayedBet <= betCounter && betCounter != 0) {
            if (lastInstantGameBlockNumber[playerByBet[lastUnplayedBet]] < block.number) {
                play();
            }
        }

        // number of new tickets to create;
        uint256 newTickets = value / ticketPriceInWei;

        eventsCounter++;

        betCounter++;
        if (betCounter == 1) {
            lastUnplayedBet = 1;
        }

        playerByBet[betCounter] = msg.sender;

        BetPlaced(eventsCounter, betCounter, msg.sender, value, ticketsTotal, newTickets);

        uint256 playerBetToPlace = newTickets.mul(ticketPriceInWei);

        sum[playersBets] = sum[playersBets].add(playerBetToPlace);

        require(newTickets > 0 && newTickets <= maxTicketsToBuyInOneTransaction);

        uint256 newTicketsTotal = ticketsTotal.add(newTickets);

        // new tickets included in jackpot games instantly:
        for (uint256 i = ticketsTotal + 1; i <= newTicketsTotal; i++) {
            theLotteryTicket[i] = msg.sender;
        }

        ticketsTotal = newTicketsTotal;
        playerTicketsTotal[msg.sender] = playerTicketsTotal[msg.sender].add(newTickets);

        lastInstantGameTicketsNumber[msg.sender] = newTickets;
        instantGameIsRunning[msg.sender] = true;
        lastInstantGameBlockNumber[msg.sender] = block.number;
    }

    function placeABet() public payable {
        placeABetInternal(msg.value);
    }

    mapping(address => address) public referrer;

    function placeABetWithReferrer(address _referrer) public payable {
        /* referrer: */
        if (referrer[msg.sender] == 0x0000000000000000000000000000000000000000) {
            referrer[msg.sender] = _referrer;
        }
        placeABetInternal(msg.value);
    }

    event Investment(
        uint256 indexed eventsCounter, //.1
        address indexed by, //............2
        uint256 sum, //...................3
        uint256 sumToMarketingFund, //....4
        uint256 bet, //...................5
        uint256 tokens //.................6
    ); //
    function investAndPlay() public payable {

        // require( luckyStrikeTokens.tokenSaleIsRunning());
        // < we will check this in luckyStrikeTokens.mint method

        require(msg.value > 0);
        uint256 sumToMarketingFund = msg.value.div(5);

        sum[marketingFund] = sum[marketingFund].add(sumToMarketingFund);

        uint256 bet = msg.value.sub(sumToMarketingFund);

        // uint256 tokensToMint = msg.value / ticketPriceInWei;
        // uint256 tokensToMint = bet / tokenPriceInWei;
        uint256 tokensToMint = sumToMarketingFund / tokenPriceInWei;

        luckyStrikeTokens.mint(msg.sender, tokensToMint, sumToMarketingFund);

        eventsCounter = eventsCounter + 1;
        Investment(
            eventsCounter, //......1
            msg.sender, //.........2
            msg.value, //..........3
            sumToMarketingFund, //.4
            bet, //................5
            tokensToMint //........6
        );

        placeABetInternal(bet);

    }

    function investAndPlayWithReferrer(address _referrer) public payable {
        if (referrer[msg.sender] == 0x0000000000000000000000000000000000000000) {
            referrer[msg.sender] = _referrer;
        }
        investAndPlay();
    }

    // second step in instant game:
    event InstantGameResult (
        uint256 indexed eventsCounter, //...0
        uint256 gameId, // .................1
        bool theBetPlayed, //...............2
        address indexed challenger, //......3
        address indexed king, //............4
        uint256 kingsTicketsNumber, //......5
        address winner, //..................6
        uint256 prize, //...................7
        uint256 ticketsInTheInstantGame, //.8
        uint256 randomNumber, //............9
        address triggeredBy //..............10
    );

    uint256 public kingChangedOnBlock; //
    uint256 public currentKingVictoriesCounter; //
    struct Victory {
        uint256 number;
        // uint256 unixTime;
        address loser;
        uint256 loserTicketsAmount;
    } //
    mapping(uint256 => Victory) public currentKingVictories;

    /*
    * plays last unplayed bet
    * can be run by any address on the blockchain
    * we also run a bot that will check smart contract every ... seconds, and it there is an unplayed bet runs play()
    */
    function play() public {

        require(lastUnplayedBet <= betCounter);
        address player = playerByBet[lastUnplayedBet];

        require(instantGameIsRunning[player]);
        // additional check
        require(lastInstantGameBlockNumber[player] < block.number);

        // block number with the bet must be no more than 255 blocks before the current block
        // or we get 0 as blockhash

        instantGameCounter = instantGameCounter + 1;

        uint256 playerBet = lastInstantGameTicketsNumber[player].mul(ticketPriceInWei);
        // uint256 kingsBet = kingOfTheHillTicketsNumber.mul(ticketPriceInWei); // < stack to deep, try removing local variables
        uint256 ticketsInTheInstantGame = kingOfTheHillTicketsNumber.add(lastInstantGameTicketsNumber[player]);
        // in any case playerBet should be subtracted from sum[playerBets]
        sum[playersBets] = sum[playersBets].sub(playerBet);

        // TODO: recheck this >
        if (block.number - lastInstantGameBlockNumber[player] > 255) {
            eventsCounter = eventsCounter + 1;
            InstantGameResult(
                eventsCounter,
                instantGameCounter,
                false,
                player,
                address(0), // kingOfTheHill, // oldKingOfTheHill,
                0,
                address(0), // winner,
                0, // prize,
                0, // lastInstantGameTicketsNumber[player], // ticketsInTheInstantGame,
                0, // randomNumber,
                msg.sender // triggeredBy
            );

            // player.transfer(playerBet); // < player still plays in jackpots
            sum[income] = sum[income].add(playerBet);

            lastInstantGameTicketsNumber[player] = 0;
            instantGameIsRunning[player] = false;

            lastUnplayedBet++;

            return;
        }

        // TODO: recheck this
        bytes32 seed = keccak256(
            block.blockhash(lastInstantGameBlockNumber[player]) // bytes32
        );

        // uint256 seedToNumber = uint256(seed);
        // uint256 randomNumber = seedToNumber % ticketsInTheInstantGame;
        uint256 randomNumber = uint256(seed) % ticketsInTheInstantGame;

        // 0 never plays, and ticketsInTheInstantGame can not be returned by the function above
        if (randomNumber == 0) {
            randomNumber = ticketsInTheInstantGame;
        }

        address oldKingOfTheHill = kingOfTheHill;
        uint256 oldKingOfTheHillTicketsNumber = kingOfTheHillTicketsNumber;

        uint256 prize;
        address winner;
        // address loser;

        if (randomNumber > kingOfTheHillTicketsNumber) {// challenger ('player') wins
            winner = player;
            prize = allocateSum(kingOfTheHillTicketsNumber.mul(ticketPriceInWei), kingOfTheHill);

            // record this victory for the new king:
            currentKingVictoriesCounter = 1;
            currentKingVictories[currentKingVictoriesCounter].number = currentKingVictoriesCounter;
            currentKingVictories[currentKingVictoriesCounter].loser = kingOfTheHill;
            currentKingVictories[currentKingVictoriesCounter].loserTicketsAmount = kingOfTheHillTicketsNumber;

            // inaugurate new kingOfTheHill:
            kingChangedOnBlock = block.number;
            kingOfTheHill = player;
            kingOfTheHillTicketsNumber = lastInstantGameTicketsNumber[player];

        } else {// kingOfTheHill wins
            winner = kingOfTheHill;
            prize = allocateSum(playerBet, player);
            currentKingVictoriesCounter++;
            currentKingVictories[currentKingVictoriesCounter].number = currentKingVictoriesCounter;
            currentKingVictories[currentKingVictoriesCounter].loser = player;
            currentKingVictories[currentKingVictoriesCounter].loserTicketsAmount = lastInstantGameTicketsNumber[player];
        }

        instantGameIsRunning[player] = false;

        // pay prize to the winner
        winner.transfer(prize);

        eventsCounter = eventsCounter + 1;
        InstantGameResult(
            eventsCounter,
            instantGameCounter,
            true,
            player,
            oldKingOfTheHill,
            oldKingOfTheHillTicketsNumber,
            winner,
            prize,
            ticketsInTheInstantGame,
            randomNumber,
            msg.sender
        );

        lastUnplayedBet++;

    }

    /* ----------- Jackpots: ------------ */

    function requestRandomFromOraclize() private returns (bytes32 oraclizeQueryId)  {

        require(msg.value >= oraclizeGetPrice());
        // < to pay to oraclize

        // call Oraclize
        // uint N :
        // number nRandomBytes between 1 and 32, which is the number of random bytes to be returned to the application.
        // see: http://www.oraclize.it/papers/random_datasource-rev1.pdf
        uint256 N = 32;
        // number of seconds to wait before the execution takes place
        uint delay = 0;
        // this function internally generates the correct oraclize_query and returns its queryId
        oraclizeQueryId = oraclize_newRandomDSQuery(delay, N, oraclizeCallbackGas);

        // playJackpotEvent(msg.sender, msg.value, tx.gasprice, oraclizeQueryId);
        return oraclizeQueryId;

    }

    // reminder (this defined above):
    // mapping(uint8 => uint256) public period; // in seconds
    // mapping(uint8 => uint256) public lastJackpotTime;  // unix time
    mapping(bytes32 => uint8) public jackpot;

    event JackpotPlayStarted(
        uint256 indexed eventsCounter,
        uint8 indexed jackpotType,
        address startedBy,
        bytes32 oraclizeQueryId,
        uint256 ticketsPlayingInJackpot
    );//

    mapping(bytes32 => uint256) public numberOfTicketsPlayingInJackpot;

    function startJackpotPlay(uint8 jackpotType) public payable {

        require(msg.value >= oraclizeGetPrice());
        require(jackpotType >= 1 && jackpotType <= 4);

        resetJackpotPlayIsRunning(jackpotType);

        require(!jackpotPlayIsRunning[jackpotType]);
        require(
        // block.timestamp (uint): current block timestamp as seconds since unix epoch
            block.timestamp >= lastJackpotTime[jackpotType].add(period[jackpotType])
        );

        bytes32 oraclizeQueryId = requestRandomFromOraclize();
        jackpot[oraclizeQueryId] = jackpotType;

        jackpotPlayIsRunning[jackpotType] = true;
        jackpotPlayLastTimeStartedFromBlock[jackpotType] = block.number;

        numberOfTicketsPlayingInJackpot[oraclizeQueryId] = ticketsTotal;

        eventsCounter = eventsCounter + 1;
        JackpotPlayStarted(eventsCounter, jackpotType, msg.sender, oraclizeQueryId, numberOfTicketsPlayingInJackpot[oraclizeQueryId]);

    }

    uint256 public allJackpotsCounter;

    event JackpotResult(
        uint256 indexed eventsCounter,
        uint256 allJackpotsCounter,
        uint8 indexed jackpotType,
        uint256 jackpotIdNumber,
        uint256 prize,
        address indexed winner,
        uint256 randomNumber,
        uint256 ticketsPlayedInJackpot
    );

    // the callback function is called by Oraclize when the result is ready
    // the oraclize_randomDS_proofVerify modifier prevents an invalid proof to execute this function code:
    // the proof validity is fully verified on-chain
    function __callback(bytes32 _queryId, string _result, bytes _proof) public {

        require(msg.sender == oraclize_cbAddress());

        if (oraclize_randomDS_proofVerify__returnCode(_queryId, _result, _proof) != 0) {
            // the proof verification has failed, do we need to take any action here? (depends on the use case)
            revert();
        } else {

            // find jackpot for this _queryId:

            uint8 jackpotType = jackpot[_queryId];
            require(jackpotPlayIsRunning[jackpotType]);


            jackpotCounter[jackpotType] = jackpotCounter[jackpotType] + 1;

            // select jackpot winner:

            // bytes32 hashOfTheRandomString = keccak256(_result);
            // uint256 randomNumberSeed = uint256(hashOfTheRandomString);
            uint256 randomNumberSeed = uint256(keccak256(_result));

            uint256 randomNumber = randomNumberSeed % numberOfTicketsPlayingInJackpot[_queryId];

            // there is no ticket # 0,
            // and above function can not return number equivalent to number of all tickets playing in Jackpot
            if (randomNumber == 0) {
                randomNumber = numberOfTicketsPlayingInJackpot[_queryId];
            }

            // address winner = theLotteryTicket[randomNumber];

            // transfer jackpot sum to the winner:
            theLotteryTicket[randomNumber].transfer(sum[jackpotType]);
            //

            // emit event:
            eventsCounter = eventsCounter + 1;
            allJackpotsCounter = allJackpotsCounter + 1;
            JackpotResult(
                eventsCounter,
                allJackpotsCounter,
                jackpotType,
                jackpotCounter[jackpotType],
                sum[jackpotType],
                theLotteryTicket[randomNumber],
                randomNumber,
                numberOfTicketsPlayingInJackpot[_queryId]
            );

            // update information for this jackpot:

            sum[jackpotType] = 0;

            lastJackpotTime[jackpotType] = block.timestamp;

            jackpotPlayIsRunning[jackpotType] = false;

        }
    } // end of function __callback


    /*
    * if it was already triggered more than 200 blocks ago and still no results
    * it can be started again
    */
    function resetJackpotPlayIsRunning(uint8 _jackpotType) public returns (bool success){
        if (
            jackpotPlayIsRunning[_jackpotType] == true &&
        jackpotPlayLastTimeStartedFromBlock[_jackpotType].sub(block.number) > 200 // TODO < change in production <<<<<<<
        ) {
            jackpotPlayIsRunning[_jackpotType] = false;
        }
        return true;
    }

    event IncomeSentToTokensContract(uint256 indexed eventsCounter, uint256 sum, address indexed triggeredBy);
    // can be called by any address:
    function payIncome() public returns (bool success){

        // luckyStrikeTokensContractAddress.transfer(sum[income]);
        luckyStrikeTokens.transferIncome.value(sum[income])();

        eventsCounter = eventsCounter + 1;
        IncomeSentToTokensContract(eventsCounter, sum[income], msg.sender);

        sum[income] = 0;

        return true;
    }

}