PriceTicker

// Submitted by EthereumHistory (ethereumhistory.com)
// <ORACLIZE_API>
/*
Copyright (c) 2015 Oraclize srl, Thomas Bertani



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.
*/

contract OraclizeI {
    address public cbAddress;
    function query(uint _timestamp, string _datasource, string _arg) returns (bytes32 _id);
    function query_withGasLimit(uint _timestamp, string _datasource, string _arg, uint _gaslimit) returns (bytes32 _id);
    function query2(uint _timestamp, string _datasource, string _arg1, string _arg2) returns (bytes32 _id);
    function query2_withGasLimit(uint _timestamp, string _datasource, string _arg1, string _arg2, uint _gaslimit) 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);
}
contract OraclizeAddrResolverI {
    function getAddress() returns (address _addr);
}
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 proofStorage_IPFS = 0x01;

    OraclizeI oraclize;
    modifier oraclizeAPI {
        OraclizeAddrResolverI OAR = OraclizeAddrResolverI(0x1d11e5eae3112dbd44f99266872ff1d07c77dce8);
        oraclize = OraclizeI(OAR.getAddress());
        _
    }
    modifier coupon(string code){
        OraclizeAddrResolverI OAR = OraclizeAddrResolverI(0x1d11e5eae3112dbd44f99266872ff1d07c77dce8);
        oraclize = OraclizeI(OAR.getAddress());
        oraclize.useCoupon(code);
        _
    }
    function oraclize_query(string datasource, string arg) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query.value(oraclize.getPrice(datasource))(0, datasource, arg);
    }
    function oraclize_query(uint timestamp, string datasource, string arg) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query.value(oraclize.getPrice(datasource))(timestamp, datasource, arg);
    }
    function oraclize_query(uint timestamp, string datasource, string arg, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query_withGasLimit.value(oraclize.getPrice(datasource, gaslimit))(timestamp, datasource, arg, gaslimit);
    }
    function oraclize_query(string datasource, string arg, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query_withGasLimit.value(oraclize.getPrice(datasource, gaslimit))(0, datasource, arg, gaslimit);
    }
    function oraclize_query(string datasource, string arg1, string arg2) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query2.value(oraclize.getPrice(datasource))(0, datasource, arg1, arg2);
    }
    function oraclize_query(uint timestamp, string datasource, string arg1, string arg2) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query2.value(oraclize.getPrice(datasource))(timestamp, datasource, arg1, arg2);
    }
    function oraclize_query(uint timestamp, string datasource, string arg1, string arg2, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query2_withGasLimit.value(oraclize.getPrice(datasource, gaslimit))(timestamp, datasource, arg1, arg2, gaslimit);
    }
    function oraclize_query(string datasource, string arg1, string arg2, uint gaslimit) oraclizeAPI internal returns (bytes32 id){
        return oraclize.query2_withGasLimit.value(oraclize.getPrice(datasource, gaslimit))(0, datasource, arg1, arg2, gaslimit);
    }
    function oraclize_cbAddress() oraclizeAPI internal returns (address){
        return oraclize.cbAddress();
    }
    function oraclize_setProof(byte proofP) oraclizeAPI {
        return oraclize.setProofType(proofP);
    }



    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 >= 48)&&(b1 <= 57)) b1 -= 48;
            if ((b2 >= 97)&&(b2 <= 102)) b2 -= 87;
            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) internal returns (string) {
        bytes memory ba = bytes(_a);
        bytes memory bb = bytes(_b);
        bytes memory bc = "                                                                                                                                                                                                                              ";
        uint k = 0;
        for (uint i = 0; i < ba.length; i ++){
            bc[k] = ba[i];
            k++;
        }
        for (i = 0; i < bb.length; i ++){
            bc[k] = bb[i];
            k++;
        }
        for (i = k; i < bc.length; i ++){
            bc[i] = 0;
        }
        return string(bc);
    }


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

    // 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;
        }
        return mint;
    }
    



}
// </ORACLIZE_API>



contract PriceTicker is usingOraclize {
    
    address owner;
    string public ETHXBT;
    

    function PriceTicker() {
        owner = msg.sender;
        update();
    }

    function __callback(bytes32 myid, string result) {
        if (msg.sender != oraclize_cbAddress()) throw;
        ETHXBT = result;
    }
    
    function update() {
        oraclize_query("URL", "json(https://api.kraken.com/0/public/Ticker?pair=ETHXBT).result.XETHXXBT.c.0");
    }
    
    function kill(){
        if (msg.sender == owner) suicide(msg.sender);
    }
    
}