pragma solidity ^0.5.0;

/*

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.

*/
 // Incompatible compiler version - please select a compiler within the stated pragma range, or use a different version of the oraclizeAPI!

// Dummy contract only used to emit to end-user they are using wrong solc
contract solcChecker {
/* INCOMPATIBLE SOLC: import the following instead: "github.com/oraclize/ethereum-api/oraclizeAPI_0.4.sol" */ function f(bytes calldata x) external;
}

contract OraclizeI {

    address public cbAddress;

    function setProofType(byte _proofType) external;
    function setCustomGasPrice(uint _gasPrice) external;
    function getPrice(string memory _datasource) public view returns (uint _dsprice);
    function randomDS_getSessionPubKeyHash() external view returns (bytes32 _sessionKeyHash);
    function getPrice(string memory _datasource, uint _gasLimit) public view returns (uint _dsprice);
    function queryN(uint _timestamp, string memory _datasource, bytes memory _argN) public payable returns (bytes32 _id);
    function query(uint _timestamp, string calldata _datasource, string calldata _arg) external payable returns (bytes32 _id);
    function query2(uint _timestamp, string memory _datasource, string memory _arg1, string memory _arg2) public payable returns (bytes32 _id);
    function query_withGasLimit(uint _timestamp, string calldata _datasource, string calldata _arg, uint _gasLimit) external payable returns (bytes32 _id);
    function queryN_withGasLimit(uint _timestamp, string calldata _datasource, bytes calldata _argN, uint _gasLimit) external payable returns (bytes32 _id);
    function query2_withGasLimit(uint _timestamp, string calldata _datasource, string calldata _arg1, string calldata _arg2, uint _gasLimit) external payable returns (bytes32 _id);
}

contract OraclizeAddrResolverI {
    function getAddress() public returns (address _address);
}
/*

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 pure {
        uint capacity = _capacity;
        if (capacity % 32 != 0) {
            capacity += 32 - (capacity % 32);
        }
        _buf.capacity = capacity; // Allocate space for the buffer data
        assembly {
            let ptr := mload(0x40)
            mstore(_buf, ptr)
            mstore(ptr, 0)
            mstore(0x40, add(ptr, capacity))
        }
    }

    function resize(buffer memory _buf, uint _capacity) private pure {
        bytes memory oldbuf = _buf.buf;
        init(_buf, _capacity);
        append(_buf, oldbuf);
    }

    function max(uint _a, uint _b) private pure returns (uint _max) {
        if (_a > _b) {
            return _a;
        }
        return _b;
    }
    /**
      * @dev Appends a byte array to the end of the buffer. Resizes 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 memory _data) internal pure returns (buffer memory _buffer) {
        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 {
            let bufptr := mload(_buf) // Memory address of the buffer data
            let buflen := mload(bufptr) // Length of existing buffer data
            dest := add(add(bufptr, buflen), 32) // Start address = buffer address + buffer length + sizeof(buffer length)
            mstore(bufptr, add(buflen, mload(_data))) // Update buffer length
            src := add(_data, 32)
        }
        for(; len >= 32; len -= 32) { // Copy word-length chunks while possible
            assembly {
                mstore(dest, mload(src))
            }
            dest += 32;
            src += 32;
        }
        uint mask = 256 ** (32 - len) - 1; // Copy remaining bytes
        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. Resizes 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 pure {
        if (_buf.buf.length + 1 > _buf.capacity) {
            resize(_buf, _buf.capacity * 2);
        }
        assembly {
            let bufptr := mload(_buf) // Memory address of the buffer data
            let buflen := mload(bufptr) // Length of existing buffer data
            let dest := add(add(bufptr, buflen), 32) // Address = buffer address + buffer length + sizeof(buffer length)
            mstore8(dest, _data)
            mstore(bufptr, add(buflen, 1)) // Update buffer length
        }
    }
    /**
      *
      * @dev Appends a byte to the end of the buffer. Resizes 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 pure returns (buffer memory _buffer) {
        if (_len + _buf.buf.length > _buf.capacity) {
            resize(_buf, max(_buf.capacity, _len) * 2);
        }
        uint mask = 256 ** _len - 1;
        assembly {
            let bufptr := mload(_buf) // Memory address of the buffer data
            let buflen := mload(bufptr) // Length of existing buffer data
            let dest := add(add(bufptr, buflen), _len) // Address = buffer address + buffer length + sizeof(buffer length) + len
            mstore(dest, or(and(mload(dest), not(mask)), _data))
            mstore(bufptr, add(buflen, _len)) // Update buffer length
        }
        return _buf;
    }
}

library CBOR {

    using Buffer for Buffer.buffer;

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

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

    function encodeIndefiniteLengthType(Buffer.buffer memory _buf, uint8 _major) private pure {
        _buf.append(uint8((_major << 5) | 31));
    }

    function encodeUInt(Buffer.buffer memory _buf, uint _value) internal pure {
        encodeType(_buf, MAJOR_TYPE_INT, _value);
    }

    function encodeInt(Buffer.buffer memory _buf, int _value) internal pure {
        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 memory _value) internal pure {
        encodeType(_buf, MAJOR_TYPE_BYTES, _value.length);
        _buf.append(_value);
    }

    function encodeString(Buffer.buffer memory _buf, string memory _value) internal pure {
        encodeType(_buf, MAJOR_TYPE_STRING, bytes(_value).length);
        _buf.append(bytes(_value));
    }

    function startArray(Buffer.buffer memory _buf) internal pure {
        encodeIndefiniteLengthType(_buf, MAJOR_TYPE_ARRAY);
    }

    function startMap(Buffer.buffer memory _buf) internal pure {
        encodeIndefiniteLengthType(_buf, MAJOR_TYPE_MAP);
    }

    function endSequence(Buffer.buffer memory _buf) internal pure {
        encodeIndefiniteLengthType(_buf, MAJOR_TYPE_CONTENT_FREE);
    }
}
/*

End solidity-cborutils

*/
contract usingOraclize {

    using CBOR for Buffer.buffer;

    OraclizeI oraclize;
    OraclizeAddrResolverI OAR;

    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_Ledger = 0x30;
    byte constant proofType_Native = 0xF0;
    byte constant proofStorage_IPFS = 0x01;
    byte constant proofType_Android = 0x40;
    byte constant proofType_TLSNotary = 0x10;

    string oraclize_network_name;
    uint8 constant networkID_auto = 0;
    uint8 constant networkID_morden = 2;
    uint8 constant networkID_mainnet = 1;
    uint8 constant networkID_testnet = 2;
    uint8 constant networkID_consensys = 161;

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

    modifier oraclizeAPI {
        if ((address(OAR) == address(0)) || (getCodeSize(address(OAR)) == 0)) {
            oraclize_setNetwork(networkID_auto);
        }
        if (address(oraclize) != OAR.getAddress()) {
            oraclize = OraclizeI(OAR.getAddress());
        }
        _;
    }

    modifier oraclize_randomDS_proofVerify(bytes32 _queryId, string memory _result, bytes memory _proof) {
        // RandomDS Proof Step 1: The prefix has to match 'LP\x01' (Ledger Proof version 1)
        require((_proof[0] == "L") && (_proof[1] == "P") && (uint8(_proof[2]) == uint8(1)));
        bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName());
        require(proofVerified);
        _;
    }

    function oraclize_setNetwork(uint8 _networkID) internal returns (bool _networkSet) {
      return oraclize_setNetwork();
      _networkID; // silence the warning and remain backwards compatible
    }

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

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

    function oraclize_setNetwork() internal returns (bool _networkSet) {
        if (getCodeSize(0x1d3B2638a7cC9f2CB3D298A3DA7a90B67E5506ed) > 0) { //mainnet
            OAR = OraclizeAddrResolverI(0x1d3B2638a7cC9f2CB3D298A3DA7a90B67E5506ed);
            oraclize_setNetworkName("eth_mainnet");
            return true;
        }
        if (getCodeSize(0xB7A07BcF2Ba2f2703b24C0691b5278999C59AC7e) > 0) { //kovan testnet
            OAR = OraclizeAddrResolverI(0xB7A07BcF2Ba2f2703b24C0691b5278999C59AC7e);
            oraclize_setNetworkName("eth_kovan");
            return true;
        }
        return false;
    }

    function __callback(bytes32 _myid, string memory _result) public {
        __callback(_myid, _result, new bytes(0));
    }

    function __callback(bytes32 _myid, string memory _result, bytes memory _proof) public {
      return;
      _myid; _result; _proof; // Silence compiler warnings
    }

    function oraclize_getPrice(string memory _datasource, uint _gasLimit) oraclizeAPI internal returns (uint _queryPrice) {
        return oraclize.getPrice(_datasource, _gasLimit);
    }

    function oraclize_query(uint _timestamp, string memory _datasource, string memory _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 memory _datasource, bytes[] memory _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 memory _datasource, bytes[4] memory _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_cbAddress() oraclizeAPI internal returns (address _callbackAddress) {
        return oraclize.cbAddress();
    }

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

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

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

    function ba2cbor(bytes[] memory _arr) internal pure returns (bytes memory _cborEncoding) {
        safeMemoryCleaner();
        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;
    }

    function oraclize_newRandomDSQuery(uint _delay, uint _nbytes, uint _customGasLimit) internal returns (bytes32 _queryId) {
        require((_nbytes > 0) && (_nbytes <= 32));
        _delay *= 10; // Convert from seconds to ledger timer ticks
        bytes memory nbytes = new bytes(1);
        nbytes[0] = byte(uint8(_nbytes));
        bytes memory unonce = new bytes(32);
        bytes memory sessionKeyHash = new bytes(32);
        bytes32 sessionKeyHash_bytes32 = oraclize_randomDS_getSessionPubKeyHash();
        assembly {
            mstore(unonce, 0x20)
            /*
             The following variables can be relaxed.
             Check the relaxed random contract at https://github.com/oraclize/ethereum-examples
             for an idea on how to override and replace commit hash variables.
            */
            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, keccak256(abi.encodePacked(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;
    }

    function verifySig(bytes32 _tosignh, bytes memory _dersig, bytes memory _pubkey) internal returns (bool _sigVerified) {
        bool sigok;
        address signer;
        bytes32 sigr;
        bytes32 sigs;
        bytes memory sigr_ = new bytes(32);
        uint offset = 4 + (uint(uint8(_dersig[3])) - 0x20);
        sigr_ = copyBytes(_dersig, offset, 32, sigr_, 0);
        bytes memory sigs_ = new bytes(32);
        offset += 32 + 2;
        sigs_ = copyBytes(_dersig, offset + (uint(uint8(_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(uint160(uint256(keccak256(_pubkey)))) == signer) {
            return true;
        } else {
            (sigok, signer) = safer_ecrecover(_tosignh, 28, sigr, sigs);
            return (address(uint160(uint256(keccak256(_pubkey)))) == signer);
        }
    }

    function oraclize_randomDS_proofVerify__sessionKeyValidity(bytes memory _proof, uint _sig2offset) internal returns (bool _proofVerified) {
        bool sigok;
        // Random DS Proof Step 6: Verify the attestation signature, APPKEY1 must sign the sessionKey from the correct ledger app (CODEHASH)
        bytes memory sig2 = new bytes(uint(uint8(_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] = byte(uint8(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) {
            return false;
        }
        // Random DS Proof 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(uint8(_proof[3 + 65 + 1])) + 2);
        copyBytes(_proof, 3 + 65, sig3.length, sig3, 0);
        sigok = verifySig(sha256(tosign3), sig3, LEDGERKEY);
        return sigok;
    }

    function oraclize_randomDS_proofVerify__returnCode(bytes32 _queryId, string memory _result, bytes memory _proof) internal returns (uint8 _returnCode) {
        // Random DS Proof Step 1: The prefix has to match 'LP\x01' (Ledger Proof version 1)
        if ((_proof[0] != "L") || (_proof[1] != "P") || (uint8(_proof[2]) != uint8(1))) {
            return 1;
        }
        bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName());
        if (!proofVerified) {
            return 2;
        }
        return 0;
    }

    function matchBytes32Prefix(bytes32 _content, bytes memory _prefix, uint _nRandomBytes) internal pure returns (bool _matchesPrefix) {
        bool match_ = true;
        require(_prefix.length == _nRandomBytes);
        for (uint256 i = 0; i< _nRandomBytes; i++) {
            if (_content[i] != _prefix[i]) {
                match_ = false;
            }
        }
        return match_;
    }

    function oraclize_randomDS_proofVerify__main(bytes memory _proof, bytes32 _queryId, bytes memory _result, string memory _contextName) internal returns (bool _proofVerified) {
        // Random DS Proof Step 2: The unique keyhash has to match with the sha256 of (context name + _queryId)
        uint ledgerProofLength = 3 + 65 + (uint(uint8(_proof[3 + 65 + 1])) + 2) + 32;
        bytes memory keyhash = new bytes(32);
        copyBytes(_proof, ledgerProofLength, 32, keyhash, 0);
        if (!(keccak256(keyhash) == keccak256(abi.encodePacked(sha256(abi.encodePacked(_contextName, _queryId)))))) {
            return false;
        }
        bytes memory sig1 = new bytes(uint(uint8(_proof[ledgerProofLength + (32 + 8 + 1 + 32) + 1])) + 2);
        copyBytes(_proof, ledgerProofLength + (32 + 8 + 1 + 32), sig1.length, sig1, 0);
        // Random DS Proof 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(uint8(_proof[ledgerProofLength + 32 + 8])))) {
            return false;
        }
        // Random DS Proof Step 4: Commitment match verification, keccak256(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] == keccak256(abi.encodePacked(commitmentSlice1, sessionPubkeyHash))) { //unonce, nbytes and sessionKeyHash match
            delete oraclize_randomDS_args[_queryId];
        } else return false;
        // Random DS Proof 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]) {
            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 memory _from, uint _fromOffset, uint _length, bytes memory _to, uint _toOffset) internal pure returns (bytes memory _copiedBytes) {
        uint minLength = _length + _toOffset;
        require(_to.length >= minLength); // Buffer too small. Should be a better way?
        uint i = 32 + _fromOffset; // NOTE: the offset 32 is added to skip the `size` field of both bytes variables
        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 _success, address _recoveredAddress) {
        /*
         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)
            ret := call(3000, 1, 0, size, 128, size, 32) // NOTE: we can reuse the request memory because we deal with the return code.
            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 memory _sig) internal returns (bool _success, address _recoveredAddress) {
        bytes32 r;
        bytes32 s;
        uint8 v;
        if (_sig.length != 65) {
            return (false, address(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, address(0));
        }
        return safer_ecrecover(_hash, v, r, s);
    }

    function safeMemoryCleaner() internal pure {
        assembly {
            let fmem := mload(0x40)
            codecopy(fmem, codesize, sub(msize, fmem))
        }
    }
}
/*

END ORACLIZE_API

*/

/**
 * @title SafeMath
 * @dev Unsigned math operations with safety checks that revert on error
 */
library SafeMath {
    /**
     * @dev Multiplies two unsigned integers, reverts on overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b);

        return c;
    }

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

        return c;
    }

    /**
     * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Adds two unsigned integers, reverts on overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a);

        return c;
    }

    /**
     * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
     * reverts when dividing by zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0);
        return a % b;
    }
}

contract BadBitSettings {

    uint public constant GWEI_TO_WEI = 1000000000;
    uint public constant ETH_TO_WEI = 1000000000000000000;
    uint public ORACLIZE_GAS_LIMIT = 220000;
    uint public MAX_GAS_PRICE = 30000000000; // in wei
    uint public MIN_GAS_PRICE = 1000000000; // in wei
    uint public BIG_WIN_THRESHOLD = 3 ether;
    uint public MAX_CHANCE_FOR_BONUS_BETTING = 25;
    uint public MAX_DON_IN_ROW = 3;
    uint public HOUSE_EDGE = 2000;
    uint public MAX_WP = 9500;
    uint public MIN_WP = 476;
    uint public REVENUE_TO_INITIAL_DEPOSIT_RATIO = 2;
    bool public BETS_ALLOWED = true;
    bool public USE_BLOCKHASH_RANDOM_SEED = false;

    /**
    * @dev mapping holding game addresses
    */
    mapping(address => bool) public isGameAddress;
    /**
    * @dev mapping holding operator addresses
    */
    mapping(address => bool) public isOperatorAddress;
    /**
    * @dev keeps track of all games
    */
    address[] public gameContractAddresses;
    /**
    * @dev keeps track of all operators
    */
    address[] public operators;
    /**
    * @dev keep token win chance reward for each level, stored as percentage times 100
    */
    uint[] public tokenWinChanceRewardForLevel;
    /**
    * @dev keep bonus balance reward for each level
    */
    uint[] public bonusBalanceRewardForLevel;

    event GamePaused(bool indexed yes);
    event MaxGasPriceSet(uint amount);
    event MinGasPriceSet(uint amount);
    event BigWinThresholdSet(uint amount);
    event MaxChanceForBonusBetSet(uint amount);
    event MaxDonInRowSet(uint count);
    event HouseEdgeSet(uint houseEdge);
    event MaxWPSet(uint maxWp);
    event MinWPSet(uint minWp);

    modifier onlyOperators() {
        require (isOperatorAddress[msg.sender]);
        _;
    }

    constructor() public {
        operators.push(msg.sender);
        isOperatorAddress[msg.sender] = true;

        bonusBalanceRewardForLevel = [0, 0, 0.01 ether, 0.02 ether, 0,
            0.03 ether, 0.04 ether, 0.05 ether, 0, 0.06 ether, 0.07 ether,
            0.08 ether, 0, 0.09 ether, 0.10 ether, 0.11 ether, 0, 0.12 ether,
            0.13 ether, 0.14 ether, 0, 0.15 ether, 0.16 ether, 0.17 ether, 0,
            0.18 ether, 0.19 ether, 0.20 ether, 0, 0.21 ether, 0.22 ether,
            0.23 ether, 0, 0.24 ether, 0.25 ether, 0.26 ether, 0, 0.27 ether,
            0.28 ether, 0.29 ether, 0, 0.30 ether, 0.31 ether, 0.32 ether, 0,
            0.33 ether, 0.34 ether, 0.35 ether, 0, 0.36 ether, 0.37 ether,
            0.38 ether, 0, 0.39 ether, 0.40 ether, 0.41 ether, 0, 0.42 ether,
            0.43 ether, 0.44 ether, 0, 0.45 ether, 0.46 ether, 0.47 ether, 0,
            0.48 ether, 0.49 ether, 0.50 ether, 0, 0.51 ether, 0.52 ether,
            0.53 ether, 0, 0.54 ether, 0.55 ether, 0.56 ether, 0, 0.57 ether,
            0.58 ether, 0.59 ether, 0, 0.60 ether, 0.61 ether, 0.62 ether, 0,
            0.63 ether, 0.64 ether, 0.65 ether, 0, 0.66 ether, 0.67 ether,
            0.68 ether, 0, 0.69 ether, 0.70 ether, 0.71 ether, 0, 0.72 ether,
            0.73 ether, 0.74 ether, 0];


        tokenWinChanceRewardForLevel = [0, 0, 0, 0, 40, 40, 40, 40, 80, 80, 80, 80,
            120, 120, 120, 120, 160, 160, 160, 160, 200, 200, 200, 200, 250, 250, 250, 250, 300, 300, 300, 300,
            350, 350, 350, 350, 400, 400, 400, 400, 450, 450, 450, 450, 510, 510, 510, 510, 570, 570, 570, 570,
            630, 630, 630, 630, 690, 690, 690, 690, 750, 750, 750, 750, 820, 820, 820, 820, 890, 890, 890, 890,
            960, 960, 960, 960, 1030, 1030, 1030, 1030, 1100, 1100, 1100, 1100, 1180, 1180, 1180, 1180, 1260, 1260, 1260, 1260,
            1340, 1340, 1340, 1340, 1420, 1420, 1420, 1420, 1500];
    }

    /**
    * @dev Method that allows operators to add allowed address
    * @param _address represents address that should be added
    */
    function addGame(address _address) public onlyOperators {
        require(!isGameAddress[_address]);

        gameContractAddresses.push(_address);
        isGameAddress[_address] = true;
    }

    /**
    * @dev Method that allows operators to remove allowed address
    * @param _address represents address that should be removed
    */
    function removeGame(address _address) public onlyOperators {
        require(isGameAddress[_address]);

        uint len = gameContractAddresses.length;

        for (uint i=0; i<len; i++) {
            if (gameContractAddresses[i] == _address) {
                // move last game to i-th position
                gameContractAddresses[i] = gameContractAddresses[len-1];
                // delete last game in array (its already moved so its duplicate)
                delete gameContractAddresses[len-1];
                // resize gameContractAddresses array
                gameContractAddresses.length--;
                // remove allowed address
                isGameAddress[_address] = false;
                break;
            }
        }

    }

    /**
    * @dev Method that allows operators to add allowed address
    * @param _address represents address that should be added
    */
    function addOperator(address _address) public onlyOperators {
        require(!isOperatorAddress[_address]);

        operators.push(_address);
        isOperatorAddress[_address] = true;
    }

    /**
    * @dev Method that allows operators to remove allowed address
    * @param _address represents address that should be removed
    */
    function removeOperator(address _address) public onlyOperators {
        require(isOperatorAddress[_address]);

        uint len = operators.length;

        for (uint i=0; i<len; i++) {
            if (operators[i] == _address) {
                // move last game to i-th position
                operators[i] = operators[len-1];
                // delete last game in array (its already moved so its duplicate)
                delete operators[len-1];
                // resize operators array
                operators.length--;
                // remove allowed address
                isOperatorAddress[_address] = false;
                break;
            }
        }

    }

    function setMaxGasPriceInGwei(uint _maxGasPrice) public onlyOperators {
        MAX_GAS_PRICE = _maxGasPrice * GWEI_TO_WEI;

        emit MaxGasPriceSet(MAX_GAS_PRICE);
    }

    function setMinGasPriceInGwei(uint _minGasPrice) public onlyOperators {
        MIN_GAS_PRICE = _minGasPrice * GWEI_TO_WEI;

        emit MinGasPriceSet(MIN_GAS_PRICE);
    }

    function setBetsAllowed(bool _betsAllowed) public onlyOperators {
        BETS_ALLOWED = _betsAllowed;

        emit GamePaused(!_betsAllowed);
    }

    function setBigWin(uint _bigWin) public onlyOperators {
        BIG_WIN_THRESHOLD = _bigWin;

        emit BigWinThresholdSet(BIG_WIN_THRESHOLD);
    }

    function setMaxChanceForBonus(uint _chance) public onlyOperators {
        MAX_CHANCE_FOR_BONUS_BETTING = _chance;

        emit MaxChanceForBonusBetSet(MAX_CHANCE_FOR_BONUS_BETTING);
    }

    function setMaxDonInRow(uint _count) public onlyOperators {
        MAX_DON_IN_ROW = _count;

        emit MaxDonInRowSet(MAX_DON_IN_ROW);
    }

    function setHouseEdge(uint _edge) public onlyOperators {
        // we allow three decimal places, so it is 100 * 1000
        require(_edge < 100000);

        HOUSE_EDGE = _edge;

        emit HouseEdgeSet(HOUSE_EDGE);
    }

    function setOraclizeGasLimit(uint _gas) public onlyOperators {
        ORACLIZE_GAS_LIMIT = _gas;
    }

    function setMaxWp(uint _wp) public onlyOperators {
        MAX_WP = _wp;

        emit MaxWPSet(_wp);
    }

    function setMinWp(uint _wp) public onlyOperators {
        MIN_WP = _wp;

        emit MinWPSet(_wp);
    }

    function setUseBlockhashRandomSeed(bool _use) public onlyOperators {
        USE_BLOCKHASH_RANDOM_SEED = _use;
    }

    function setRevenueToInitialDepositRatio(uint _ratio) public onlyOperators {
        require(_ratio >= 2);

        REVENUE_TO_INITIAL_DEPOSIT_RATIO = _ratio;
    }

    function getOperators() public view returns(address[] memory) {
        return operators;
    }

    function getGames() public view returns(address[] memory) {
        return gameContractAddresses;
    }

    function getNumberOfGames() public view returns(uint) {
        return gameContractAddresses.length;
    }
}

contract SpinGameSettings {

    enum GameType { NoColor, White, Red, Blue, Orange, Gold }

    uint public ORACLIZE_GAS_LIMIT_CALL_1 = 230000;
    uint public ORACLIZE_GAS_LIMIT_CALL_2 = 90000;
    uint public BENCHMARK_MAXIMUM_BET_SIZE = 1;
    uint public MIN_BET = 0.05 ether;
    mapping(uint8 => uint) public MAX_BET;
    uint public ROUND_TIME = 45;
    uint public GWP = 15;
    uint public GBS = 35;
    uint public STANDARD_LOT_GOLD_MODIFIER = 50; // Defines percentage of the standard token lot that player's should win when spin result is gold
    uint public MAX_BET_WHITE = 1 ether;
    uint public MAX_BET_RED = 0.5 ether;
    uint public MAX_BET_BLUE = 0.4 ether;
    uint public MAX_BET_ORANGE = 0.1 ether;
    bool public USE_DYNAMIC_MAX_BET = true;
    bool public BETS_ALLOWED = true;
    uint public MINIMUM_BALANCE_THRESHOLD = 0.01 ether;
    uint public ROUND_MULTIPLIER_FOR_ORACLIZE_POOL = 50;

    BadBitSettings public settings;

    event GamePaused(bool indexed yes);
    event UseDynamicBetChanged(bool useDynamic);
    event RoundTimeSet(uint roundTime);
    event BenchmarkParameterSet(uint b);
    event MinBetSet(uint amount);
    event MaxBetSet(GameType color, uint amount);

    modifier onlyOperator() {
        require (settings.isOperatorAddress(msg.sender));
        _;
    }

    constructor(address payable _settings) public {

        settings = BadBitSettings(_settings);
        MAX_BET[uint8(GameType.White)] = MAX_BET_WHITE;
        MAX_BET[uint8(GameType.Red)] = MAX_BET_RED;
        MAX_BET[uint8(GameType.Blue)] = MAX_BET_BLUE;
        MAX_BET[uint8(GameType.Orange)] = MAX_BET_ORANGE;
    }

    function setRoundTime(uint _roundTime) public onlyOperator {
        ROUND_TIME = _roundTime;

        emit RoundTimeSet(ROUND_TIME);
    }

    function setBenchmarkParam(uint _b) public onlyOperator {
        BENCHMARK_MAXIMUM_BET_SIZE = _b;

        emit BenchmarkParameterSet(BENCHMARK_MAXIMUM_BET_SIZE);
    }

    function setFirstOraclizeGasLimit(uint _gasLimit) public onlyOperator {

        ORACLIZE_GAS_LIMIT_CALL_1 = _gasLimit;
    }

    function setSecondOraclizeGasLimit(uint _gasLimit) public onlyOperator {

        ORACLIZE_GAS_LIMIT_CALL_2 = _gasLimit;
    }

    function setMinBet(uint _minBet) public onlyOperator {
        MIN_BET = _minBet;

        emit MinBetSet(MIN_BET);
    }

    function setWhiteMaxBet(uint _maxBet) public onlyOperator {
        MAX_BET[uint8(GameType.White)] = _maxBet;
        MAX_BET_WHITE = _maxBet;

        emit MaxBetSet(GameType.White, _maxBet);
    }

    function setRedMaxBet(uint _maxBet) public onlyOperator {
        MAX_BET[uint8(GameType.Red)] = _maxBet;
        MAX_BET_RED = _maxBet;

        emit MaxBetSet(GameType.Red, _maxBet);
    }

    function setBlueMaxBet(uint _maxBet) public onlyOperator {
        MAX_BET[uint8(GameType.Blue)] = _maxBet;
        MAX_BET_BLUE = _maxBet;

        emit MaxBetSet(GameType.Blue, _maxBet);
    }

    function setOrangeMaxBet(uint _maxBet) public onlyOperator {
        MAX_BET[uint8(GameType.Orange)] = _maxBet;
        MAX_BET_ORANGE = _maxBet;

        emit MaxBetSet(GameType.Orange, _maxBet);
    }

    function setUseDynamicMaxBet(bool _yes) public onlyOperator {
        USE_DYNAMIC_MAX_BET = _yes;

        emit UseDynamicBetChanged(_yes);
    }

    function setBetsAllowed(bool _betsAllowed) public onlyOperator {
        BETS_ALLOWED = _betsAllowed;

        emit GamePaused(!_betsAllowed);
    }

    function setStandardLotGoldModifier(uint _value) public onlyOperator {
        STANDARD_LOT_GOLD_MODIFIER = _value;
    }

    function setRoundMultiplierForOraclizePool(uint _value) public onlyOperator {
        ROUND_MULTIPLIER_FOR_ORACLIZE_POOL = _value;
    }

    function setMinimumBalanceThreshold(uint _value) public onlyOperator {
        MINIMUM_BALANCE_THRESHOLD = _value;
    }

    function setGbs(uint _gbs) public onlyOperator {
        GBS = _gbs;
    }

    function setGwp(uint _gwp) public onlyOperator {
        GWP = _gwp;
    }
}

contract IBadBitCasino {
	function add(address _user, uint _amount) public payable returns(bool);
	function placeBet(address _user, uint _betId, uint _amount, bool bonus) public;
	function getCurrentBalance(address _user) public view returns(uint);
	function sendEthToGame(uint _amount) public;
}

contract GameInterface {

    uint public commissionEarned;
    uint public totalFundsLostByPlayers;

    function finalizeBet(address _user, uint _betId) public returns(uint profit, uint totalWon);
    function canFinalizeBet(address _user, uint _betId) public view returns (bool success);
    function getUserProfitForFinishedBet(address _user, uint _betId) public view returns(uint);
    function getTotalBets(address _user) public view returns(uint);
    function getPossibleWinnings(uint _chance, uint _amount) public view returns(uint);
    function getBetInfo(address _user, uint _betId) public view returns(uint amount, bool finalized, bool won, bool bonus);
    function getParamsForTokenCaluclation(uint _chance) public view returns(uint minB, uint maxB, uint gbs, uint gwp);
    function emergencyWithdraw(address payable _sender) public;
}

contract IBadBitDistributor{
	function sendTokens(address _user, uint _amount) public;
	function getStandardLot() public view returns(uint);
	function shouldWinTokens(address _contract, bytes32 _hash, address _user, uint[] memory _betSizes, uint[] memory _chances, uint _maxNumOfBets) public view returns (bool);
	function winTokens(address _user) public;
}

contract SpinGame is usingOraclize, SpinGameSettings, GameInterface {
    using SafeMath for uint256;

    enum RoundState { Active, Closed, Finished }
    enum OraclizeCallType { None, CloseRound, FinalizeRound, Used }

    struct Round {
        GameType selectedColor;
        RoundState state;
        bytes32 randomHash;
    }

    struct Bet {
        GameType gameType;
        uint128 amount;
        uint64 round;
        bool won;
        bool finished;
        bool bonus;
    }

    /**
    * @dev lastRound id
    * @dev if it is finished then currently there is no active round
    */
    uint64 public lastRound;
    /**
    * @dev keep total commission earned
    */
    uint public commissionEarned;
    /**
    * @dev keep how many ethers is lost by player
    */
    uint public totalFundsLostByPlayers;
    /**
    * @dev keep track of all funds sent directly to contract
    */
    uint public totalFundsSentByOwner;
    /**
    * @dev Mapping that keep what is type of queryId sent to Oraclize
    */
    mapping(bytes32 => OraclizeCallType) public idToType;
    /**
    * @dev Holds all bets of user with specific address
    */
    mapping(address => Bet[]) public bets;
    /**
    * @dev Array containing all played rounds, round id is its place in array
    */
    Round[] public rounds;

    IBadBitCasino public casino;
    IBadBitDistributor public distributor;

    event RoundStarted(uint indexed id);
    event RoundFinished(uint indexed id, GameType selectedColor);
    event BetPlayed(uint indexed round, address indexed user, GameType gameType, uint amount, uint history, uint gameTypes);
    event BetDenied(uint indexed round, address indexed user);

    /**
    * @dev betting amount can be only between MIN_BET and MAX_BET
    */
    modifier onlyAllowedAmount(uint _amount, GameType _type) {
        require(MIN_BET <= _amount && _amount <= maxBetSize(_type));
        _;
    }

    /**
    * @dev we set network and starting gasPrice
    * @dev create dummy finished round to avoid edge cases
    */
    constructor(address payable _casino, address payable _settings) SpinGameSettings(_settings) public {

        casino = IBadBitCasino(_casino);

        rounds.push(Round({
                selectedColor: GameType.NoColor,
                state: RoundState.Finished,
                randomHash: bytes32(0)
            }));

        oraclize_setNetwork();
        // equals to 1 gwei
        oraclize_setCustomGasPrice(10000000000);
    }

    function setDistributor(address _distributor) public onlyOperator {
        distributor = IBadBitDistributor(_distributor);
    }

    function changeCasinoAddress(address payable _casino) public onlyOperator {
        casino = IBadBitCasino(_casino);
    }

    /**
    * @dev Betting function for all game types that should be played with on-contract bonus balance
    * @param _amount amount that user is betting for this specific bet
    * @param _type represents which game will be played
    */
    function placeBonusBet(uint128 _amount, GameType _type) public
        onlyAllowedAmount(_amount, _type) {
        require(getChance(_type) < settings.MAX_CHANCE_FOR_BONUS_BETTING() * 100);

        _bet(_amount, _type, tx.gasprice + 1000000000, true);
    }

    /**
    * @dev Betting function for all game types that should be played with on-contract balance
    * @param _amount amount that user is betting for this specific bet
    * @param _type represents which game will be played
    */
    function placeBetWithContractBalance(uint128 _amount, GameType _type) public
        onlyAllowedAmount(_amount, _type) {

        _bet(_amount, _type, tx.gasprice + 1000000000, false);
    }

    /**
    * @dev Betting function for all game types that should be played with msg.value
    * @param _amount amount that user is betting for this specific bet
    * @param _type represents which game will be played
    */
    function placeBet(uint128 _amount, GameType _type) public
        onlyAllowedAmount(_amount, _type)
        payable {

        require(msg.value >= _amount);

        require(casino.add.value(msg.value)(msg.sender, _amount));

        _bet(_amount, _type, tx.gasprice + 1000000000, false);
    }

    /**
    * @dev Internal betting function that creates actual bet and starts round if there is no active round
    * @param _amount amount that user is betting for this specific bet
    * @param _type represents which game will be played
    * @param _gasPriceInWei sets gasPrice for oraclize call, should always be a bit higher than current average
    * @param _bonus flag that says is it played with bonus balance
    */
    function _bet(uint128 _amount, GameType _type, uint _gasPriceInWei, bool _bonus) internal {
        require(BETS_ALLOWED);
        require(_type != GameType.NoColor && _type != GameType.Gold);

        // @dev we don't want to revert if gasPrice is not valid, we just set it to MIN or MAX
        if (_gasPriceInWei < settings.MIN_GAS_PRICE()) {
            _gasPriceInWei = settings.MIN_GAS_PRICE();
        } else if (_gasPriceInWei > settings.MAX_GAS_PRICE()) {
            _gasPriceInWei = settings.MAX_GAS_PRICE();
        }

        if (address(this).balance < MINIMUM_BALANCE_THRESHOLD) {
            pullEthFromCasino();
        }

        // @dev if last round is finished we need to start new round
        if (rounds[lastRound].state == RoundState.Finished) {
            oraclize_setCustomGasPrice(_gasPriceInWei);

            bytes32 queryId = oraclize_query(ROUND_TIME, "URL", "", ORACLIZE_GAS_LIMIT_CALL_1);
            idToType[queryId] = OraclizeCallType.CloseRound;

            lastRound++;
            rounds.push(Round({
                    selectedColor: GameType.NoColor,
                    state: RoundState.Active,
                    randomHash: bytes32(0)
                }));

            emit RoundStarted(lastRound);
        }

        // @dev at this point we definitely have non finished round, but it can be closed, so we need to check if its active
        if (rounds[lastRound].state == RoundState.Active) {

            // @dev if this is not your first bet you can't bet twice in same round
            if (bets[msg.sender].length > 0) {
                require(bets[msg.sender][bets[msg.sender].length-1].round != lastRound);
            }

            // this will also update last bets
            casino.placeBet(msg.sender, bets[msg.sender].length, _amount, _bonus);

            // @dev returns history of last (up to 5) bets before pushing new bet
            uint history;
            uint types;
            (history, types) = getUsersBettingHistoryWithTypes(msg.sender);

            bets[msg.sender].push(Bet({
                    gameType: _type,
                    amount: _amount,
                    round: lastRound,
                    won: false,
                    finished: false,
                    bonus: _bonus
                }));

            emit BetPlayed(lastRound, msg.sender, _type, _amount, history, types);
        } else {
            // @dev if round is closed, emit event saying that bet is denied
            emit BetDenied(lastRound, msg.sender);
        }
    }

    function __callback(bytes32 myid, string memory result) public {
        if (msg.sender != oraclize_cbAddress() && !settings.isOperatorAddress(msg.sender)) revert();

        // @dev Oraclize sometimes rebroadcast transactions, so we need to make sure thats not the case
        if (idToType[myid] == OraclizeCallType.Used) {
            return;
        }

        if (idToType[myid] == OraclizeCallType.CloseRound) {
            // In case finalization callback was executed first
            if(rounds[lastRound].state == RoundState.Finished) {
                return;
            }

            bytes32 queryId;

            if(settings.USE_BLOCKHASH_RANDOM_SEED()) {
                queryId = oraclize_query(0, "URL", "", ORACLIZE_GAS_LIMIT_CALL_2);
            } else {
                queryId = oraclize_newRandomDSQuery(0, 8, ORACLIZE_GAS_LIMIT_CALL_2);
            }

            idToType[queryId] = OraclizeCallType.FinalizeRound;
            rounds[lastRound].state = RoundState.Closed;
        } else if (idToType[myid] == OraclizeCallType.None || idToType[myid] == OraclizeCallType.FinalizeRound) {
            require(settings.USE_BLOCKHASH_RANDOM_SEED() || bytes(result).length != 0);
            uint randomNumber;

            if(settings.isOperatorAddress(msg.sender) || settings.USE_BLOCKHASH_RANDOM_SEED()) {
                randomNumber = uint224(uint(blockhash(block.number - 1)) % 42);
            } else {
                randomNumber = uint224(uint(keccak256(abi.encodePacked(result, blockhash(block.number - 1)))) % 42);
            }

            rounds[lastRound].randomHash = keccak256(abi.encodePacked(result));
            rounds[lastRound].selectedColor = getColor(randomNumber);
            rounds[lastRound].state = RoundState.Finished;

            emit RoundFinished(lastRound, rounds[lastRound].selectedColor);
        }

        idToType[myid] = OraclizeCallType.Used;
    }

    function finalizeBet(address _user, uint _betId) public returns(uint profit, uint totalWon) {
        require(msg.sender == address(casino));

        Bet memory betObject = bets[_user][_betId];

        if (rounds[betObject.round].selectedColor == GameType.Gold) {
            distributor.sendTokens(_user, distributor.getStandardLot() * STANDARD_LOT_GOLD_MODIFIER / 100);
        }

        uint[] memory betSizes = new uint[](1);
        betSizes[0] = betObject.amount;
        uint[] memory chances = new uint[](1);
        chances[0] = getChance(betObject.gameType);

        if (distributor.shouldWinTokens(address(this), rounds[betObject.round].randomHash, _user, betSizes, chances, 1)) {
            distributor.winTokens(_user);
        }

        profit = getUserProfitForFinishedBet(_user, _betId);

        if (profit > 0) {
            totalWon = bets[_user][_betId].amount + profit;
            bets[_user][_betId].won = true;
        } else if(!betObject.bonus) {
            // @dev updates global states
            totalFundsLostByPlayers = totalFundsLostByPlayers + bets[_user][_betId].amount;
        }

        bets[_user][_betId].finished = true;
    }

    function pullEthFromCasino() internal {
        uint price = oraclize_getPrice("url", ORACLIZE_GAS_LIMIT_CALL_1);
        price += settings.USE_BLOCKHASH_RANDOM_SEED() ? oraclize_getPrice("url", ORACLIZE_GAS_LIMIT_CALL_2) : oraclize_getPrice("random", ORACLIZE_GAS_LIMIT_CALL_2);

        casino.sendEthToGame(price * ROUND_MULTIPLIER_FOR_ORACLIZE_POOL);
    }

    function canFinalizeBet(address _user, uint _betId) public view returns (bool success) {
        if (rounds[bets[_user][_betId].round].state == RoundState.Finished) {
            return true;
        }

        return false;
    }

    /**
    * @dev Checks for player winning history (up to 5 bets)
    * @param _user represents address of user
    * @return returns history of user in format of uint where each decimal 2 means that bet is won, and 1 means that bet is lost
    */
    function getUsersBettingHistoryWithTypes(address _user) public view returns(uint history, uint types) {
        uint len = bets[_user].length;

        if (len > 0) {
            while (len >= 0) {
                len--;

                if (bets[_user][len].won) {
                    history = history * 10 + 2;
                } else {
                    history = history * 10 + 1;
                }

                types = types * 10 + uint(bets[_user][len].gameType);

                if (len == 0 || history > 10000) {
                    break;
                }
            }
        }
    }

    /**
    * @dev Calculate possible winning with specific chance and amount
    * @param _chance represents chance of winning bet
    * @param _amount represents amount that is played for bet
    * @return returns uint of players profit with specific chance and amount
    */
    function getPossibleWinnings(uint _chance, uint _amount) public view returns(uint) {
        // don chance
        if (_chance == 50) {
            return _amount;
        }

        GameType _type = getTypeFromChance(_chance);

        if (_type == GameType.White) {
            return _amount;
        }

        if (_type == GameType.Red) {
            return _amount * 3;
        }

        if (_type == GameType.Blue) {
            return _amount * 4;
        }

        if (_type == GameType.Orange) {
            return _amount * 19;
        }

        return 0;
    }

    /**
    * @dev check chances for specific game type and number
    * @param _gameType represents type of game
    * @return return value that represents chance of winning with specific number and gameType
    */
    function getChance(GameType _gameType) public pure returns(uint) {
        if (_gameType == GameType.White) {
            return 4760;
        }

        if (_gameType == GameType.Red) {
            return 2380;
        }

        if (_gameType == GameType.Blue) {
            return 1904;
        }

        if (_gameType == GameType.Orange) {
            return 476;
        }
    }

    /**
    * @dev check winning for specific bet for user
    * @param _user represents address of user
    * @param _betId represents id of bet for specific user
    * @return return value that represents users profit, in case round is not finished or bet is lost, returns 0
    */
    function getUserProfitForFinishedBet(address _user, uint _betId) public view returns(uint) {
        Bet memory betObject = bets[_user][_betId];
        GameType selectedColor = rounds[betObject.round].selectedColor;
        uint chance = getChance(betObject.gameType);

        if (rounds[betObject.round].state == RoundState.Finished) {
            if (betObject.gameType == selectedColor) {
                return getPossibleWinnings(chance, betObject.amount);
            }
        }

        return 0;
    }

    function getColor(uint _number) public pure returns(GameType) {
        if (_number < 20) {
            return GameType.White;
        }

        if (_number < 30) {
            return GameType.Red;
        }

        if (_number < 38) {
            return GameType.Blue;
        }

        if (_number < 40) {
            return GameType.Orange;
        }

        if (_number < 42) {
            return GameType.Gold;
        }

        return GameType.NoColor;
    }

    function getTokensWonParameters(address _user) public view returns(bytes32, uint, uint) {
        Bet memory lastBet = bets[_user][getTotalBets(_user) - 1];

        return (rounds[lastBet.round].randomHash, lastBet.amount, getChance(lastBet.gameType));
    }

    function maxBetSize(GameType _type) public view returns(uint) {
        if (USE_DYNAMIC_MAX_BET) {
            if (_type == GameType.White) {
                return BENCHMARK_MAXIMUM_BET_SIZE * settings.ETH_TO_WEI();
            }

            if (_type == GameType.Red) {
                return BENCHMARK_MAXIMUM_BET_SIZE * settings.ETH_TO_WEI() * 50 / 100;
            }

            if (_type == GameType.Blue) {
                return BENCHMARK_MAXIMUM_BET_SIZE * settings.ETH_TO_WEI() * 40 / 100;
            }

            if (_type == GameType.Orange) {
                return BENCHMARK_MAXIMUM_BET_SIZE * settings.ETH_TO_WEI() * 10 / 100;
            }
        } else {
            return MAX_BET[uint8(_type)];
        }
    }

    function getBet(address _user, uint _betId) public view returns(uint round, GameType gameType, uint amount, GameType selectedColor, bool won) {
        Bet memory betObject = bets[_user][_betId];

        return (betObject.round, betObject.gameType, betObject.amount, rounds[betObject.round].selectedColor, getUserProfitForFinishedBet(_user, _betId) > 0);
    }

    function getBetInfo(address _user, uint _betId) public view returns(uint amount, bool finalized, bool won, bool isBonus) {
        Bet memory betObject = bets[_user][_betId];

        return (betObject.amount, betObject.finished, betObject.won, betObject.bonus);
    }

    function getCurrentBalance(address _user) public view returns(uint) {
        return casino.getCurrentBalance(_user);
    }

    function getTypeFromChance(uint _chance) public pure returns(GameType _type) {
        if (_chance == 4760) {
            _type = GameType.White;
        } else if (_chance == 2380) {
            _type = GameType.Red;
        } else if (_chance == 1904) {
            _type = GameType.Blue;
        } else if (_chance == 476) {
            _type = GameType.Orange;
        }
    }

    function getParamsForTokenCaluclation(uint _chance) public view returns(uint minB, uint maxB, uint gbs, uint gwp) {
        minB = MIN_BET;
        maxB = maxBetSize(getTypeFromChance(_chance));
        gbs = GBS;
        gwp = GWP;
    }

    /**
    * @dev Checks for number of bets user played
    * @param _user address of user
    * @return returns uint representing number of total bets played by user
    */
    function getTotalBets(address _user) public view returns(uint) {
        return bets[_user].length;
    }

    function emergencyWithdraw(address payable _sender) public {
        require(msg.sender == address(casino));

        _sender.transfer(address(this).balance);
    }

    /**
    * @dev Allows anyone to just send ether to contract
    */
    function() external payable {
    }
}

{
  "compilationTarget": {
    "SpinGame.sol": "SpinGame"
  },
  "evmVersion": "petersburg",
  "libraries": {},
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}