【以太坊系列-009】在ethereum private chain上進行oraclize的調用操作

說明：

     本人使用的是 ubuntu1804-server版本(不要使用live-server，存在缺少部分包。)
     在私鏈中容易遇到問題，本人第一次成功是通過truffle+ethereumjs-testrpc。
     私鏈上不熟悉的人，操作會比較麻煩，容易出問題，並且文檔比較少。
     本文只是記錄oraclize環境的搭建，更多請參閱官網。(更多搭建請參照該系列其餘文檔)

一、ethereum 私鏈準備

前置：
    環境信息，具體環境搭建見該系列文檔
    geth： 1.8.19-unstable
    go version: go1.10.3

操作：

1, mkdir -p /home/constantinople_data
2, cd /home/constantinople_data

# cat genesis.json 
{ 
    "config": {
                "chainId": 22, 
                "constantinopleBlock": 0,     #必須使用君士坦丁堡或者拜占庭之後的版本，
                                              #否則oraclise會缺少RETURNDATASIZE的指令而報錯
                                              #(invalid opcode 0x3d)
                "eip155Block": 0, 
                "eip158Block": 0 
               },
    "alloc" : {},
    "coinbase" : "0x0000000000000000000000000000000000000000", 
    "difficulty" : "0x400", 
    "extraData" : "", 
    "gasLimit" : "0xffffffff", 
    "nonce" : "0x0000000000000038", 
    "mixhash" : "0x0000000000000000000000000000000000000000000000000000000000000000", 
    "parentHash" : "0x0000000000000000000000000000000000000000000000000000000000000000", 
    "timestamp" : "0x00" 
}

3, 初始化
# geth --datadir /home/constantinople_data  init /home/constantinople_data/genesis.json

4, 啓動
nohup geth --identity "TestNode" --rpc --rpcport "8545" --datadir /home/constantinople_data/ --port "30303" --rpccorsdomain "*" --dev.period 1 --nodiscover --debug --vmdebug --verbosity 5  &

5, 使用geth 登錄
geth attach --datadir /home/constantinople_data/

6, 創建賬戶
personal.newAccount("lyh000")
personal.newAccount("lyh001")
personal.newAccount("lyh002")
personal.newAccount("lyh003")

7, 解鎖賬戶
personal.unlockAccount(eth.accounts[0], "lyh000", 0) # 0表示永久解鎖
personal.unlockAccount(eth.accounts[1], "lyh001", 0)
personal.unlockAccount(eth.accounts[2], "lyh002", 0)
personal.unlockAccount(eth.accounts[3], "lyh003", 0)

8,啓動挖礦
miner.start(1); admin.sleepBlocks(5); miner.stop()  #挖5個礦

9, 轉賬，給每個賬號設置一點餘額
eth.sendTransaction({from: eth.accounts[0], to: eth.accounts[1], value: web3.toWei(3, "ether")})
eth.sendTransaction({from: eth.accounts[0], to: eth.accounts[2], value: web3.toWei(3, "ether")})
eth.sendTransaction({from: eth.accounts[0], to: eth.accounts[3], value: web3.toWei(3, "ether")})

10, 查看餘額
> eth.getBalance(eth.accounts[0])
3000000000000000000
> eth.getBalance(eth.accounts[1])
3000000000000000000
> eth.getBalance(eth.accounts[2])
3000000000000000000
> eth.getBalance(eth.accounts[3])
3000000000000000000
web3.fromWei(eth.getBalance(eth.accounts[0]),"ether")
web3.fromWei(eth.getBalance(eth.accounts[1]),"ether")
web3.fromWei(eth.getBalance(eth.accounts[2]),"ether")
web3.fromWei(eth.getBalance(eth.accounts[3]),"ether")

二、ethereum-bridge 準備

1,安裝

ethereum-bridge環境的準備
apt-get install nodejs
apt-get install npm 
npm install -g ethereum-bridge

node: v8.10.0 
npm: 3.5.2
ethereum-bridge: v0.6.1

2,啓動 ethereum-bridge 
# ethereum-bridge -H localhost:8545 -a 1 
(在部署的過程中，需要在geth控制檯中啓動挖礦，因爲ethereum-bridge中需要部署合約)
-a 表示使用的標號爲1的賬號，並且需要在geth控制檯中把賬號1解鎖
personal.unlockAccount(eth.accounts[1], "lyh001", 0) 
部署好後，效果如下所示，如果該環境之前沒部署過，不需要改oraclise代碼，否則需要修改。
就是在合約的構造器中添加
OAR = OraclizeAddrResolverI(0x6f485C8BF6fc43eA212E93BBF8ce046C7f1cb475); 
這種代碼。

# ethereum-bridge -H localhost:8545 -a 1 
Please wait...
[2018-11-27T05:56:14.967Z] INFO you are running ethereum-bridge - version: 0.6.1
[2018-11-27T05:56:14.969Z] INFO saving logs to: ./bridge.log
[2018-11-27T05:56:14.970Z] INFO using active mode
[2018-11-27T05:56:14.971Z] INFO Connecting to eth node http://localhost:8545
[2018-11-27T05:56:18.654Z] INFO connected to node type Geth/TestNode/v1.8.18-stable-58632d44/linux-amd64/go1.10.4
[2018-11-27T05:56:20.536Z] WARN Using 0x4fcc0e3f1fd03e2423137f0b342cc563dd37df42 to query contracts on your blockchain, make sure it is unlocked and do not use the same address to deploy your contracts
[2018-11-27T05:56:21.002Z] INFO deploying the oraclize connector contract...
[2018-11-27T05:56:44.676Z] INFO connector deployed to: 0x1dc7417ed01ee86771e079d47d980a59de309d58
[2018-11-27T05:56:45.221Z] INFO deploying the address resolver with a deterministic address...
[2018-11-27T05:57:40.979Z] INFO address resolver (OAR) deployed to: 0x6f485c8bf6fc43ea212e93bbf8ce046c7f1cb475
[2018-11-27T05:57:40.980Z] INFO updating connector pricing...
[2018-11-27T05:58:40.136Z] INFO successfully deployed all contracts
[2018-11-27T05:58:40.140Z] INFO instance configuration file saved to /usr/local/lib/node_modules/ethereum-bridge/config/instance/oracle_instance_20181127T005840.json
[2018-11-27T05:58:40.141Z] INFO you are using a deterministic OAR, you don't need to update your contract
[2018-11-27T05:58:40.723Z] INFO Listening @ 0x1dc7417ed01ee86771e079d47d980a59de309d58 (Oraclize Connector)
(Ctrl+C to exit)
# 如果已經部署過了，可以使用
ethereum-bridge --instance latest 

2, 此時可以看到eth.accounts[1]賬戶的餘額減少
> web3.fromWei(eth.getBalance(eth.accounts[1]),"ether")
2.887187366999999999
> web3.fromWei(eth.getBalance(eth.accounts[0]),"ether")
23.10751858

三、部署自己寫的調用oraclize合約

1, 設置基本賬戶
eth.coinbase=eth.accounts[0]
eth.defaultAccount=eth.accounts[0]
2, 合約代碼
本文使用的是
https://github.com/oraclize/ethereum-api/blob/master/oraclizeAPI_0.4.25.sol 
代碼，只是把自己的代碼集成到同一個文件而已
合約編譯使用的是
http://remix.ethereum.org/#optimize=false&version=soljson-v0.4.25+commit.59dbf8f1.js

// <ORACLIZE_API>
// Release targetted at solc 0.4.25 to silence compiler warning/error messages, compatible down to 0.4.22
/*
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.
*/

// This api is currently targeted at 0.4.22 to 0.4.25 (stable builds), please import oraclizeAPI_pre0.4.sol or oraclizeAPI_0.4 where necessary

pragma solidity >=0.4.22;// 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) external payable returns (bytes32 _id);
    function query_withGasLimit(uint _timestamp, string _datasource, string _arg, uint _gaslimit) external payable returns (bytes32 _id);
    function query2(uint _timestamp, string _datasource, string _arg1, string _arg2) public payable returns (bytes32 _id);
    function query2_withGasLimit(uint _timestamp, string _datasource, string _arg1, string _arg2, uint _gaslimit) external payable returns (bytes32 _id);
    function queryN(uint _timestamp, string _datasource, bytes _argN) public payable returns (bytes32 _id);
    function queryN_withGasLimit(uint _timestamp, string _datasource, bytes _argN, uint _gaslimit) external payable returns (bytes32 _id);
    function getPrice(string _datasource) public returns (uint _dsprice);
    function getPrice(string _datasource, uint gaslimit) public returns (uint _dsprice);
    function setProofType(byte _proofType) external;
    function setCustomGasPrice(uint _gasPrice) external;
    function randomDS_getSessionPubKeyHash() external constant returns(bytes32);
}

contract OraclizeAddrResolverI {
    function getAddress() public 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 pure {
        uint capacity = _capacity;
        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(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) {
        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 data) internal pure 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. 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 {
            // 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. 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) {
        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 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 value) internal pure {
        encodeType(buf, MAJOR_TYPE_BYTES, value.length);
        buf.append(value);
    }

    function encodeString(Buffer.buffer memory buf, string 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 {
    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_Ledger = 0x30;
    byte constant proofType_Android = 0x40;
    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());
        _;
    }

    function oraclize_setNetwork(uint8 networkID) internal returns(bool){
      return oraclize_setNetwork();
      networkID; // silence the warning and remain backwards compatible
    }
    function oraclize_setNetwork() 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) public {
        __callback(myid, result, new bytes(0));
    }
    function __callback(bytes32 myid, string result, bytes proof) public {
      return;
      // Following should never be reached with a preceding return, however
      // this is just a placeholder function, ideally meant to be defined in
      // child contract when proofs are used
      myid; result; proof; // Silence compiler warnings
      oraclize = OraclizeI(0); // Additional compiler silence about making function pure/view.
    }

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

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

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

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

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

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

    // parseInt(parseFloat*10^_b)
    function parseInt(string _a, uint _b) internal pure 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 pure 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 pure returns (bytes) {
        safeMemoryCleaner();
        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 pure returns (bytes) {
        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;
    }

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

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

    function oraclize_newRandomDSQuery(uint _delay, uint _nbytes, uint _customGasLimit) internal returns (bytes32){
        require((_nbytes > 0) && (_nbytes <= 32));
        // 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)
            // the following variables can be relaxed
            // check relaxed random contract under ethereum-examples repo
            // for an idea on how to override and replace comit hash vars
            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;
    }

    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(keccak256(pubkey)) == signer) return true;
        else {
            (sigok, signer) = safer_ecrecover(tosignh, 28, sigr, sigs);
            return (address(keccak256(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] = byte(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)
        require((_proof[0] == "L") && (_proof[1] == "P") && (_proof[2] == 1));

        bool proofVerified = oraclize_randomDS_proofVerify__main(_proof, _queryId, bytes(_result), oraclize_getNetworkName());
        require(proofVerified);

        _;
    }

    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 pure returns (bool){
        bool match_ = true;

        require(prefix.length == n_random_bytes);

        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 (!(keccak256(keyhash) == keccak256(abi.encodePacked(sha256(abi.encodePacked(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, 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;


        // 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 pure returns (bytes) {
        uint minLength = length + toOffset;

        // Buffer too small
        require(to.length >= minLength); // 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);
    }

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

}
// </ORACLIZE_API>

//pragma solidity ^0.4.0;
//import "./oraclizeAPI.sol";
contract ExampleContract is usingOraclize {

   string public ETHUSD;
   address public mySender;
   address public myCbAddress;
   uint public myUrlPrice;
   uint public myBalance;
   string public mylog1;
   string public mylog2;
   event LogConstructorInitiated(string nextStep);
   event LogPriceUpdated(string price);
   event LogNewOraclizeQuery(string description);

   function ExampleContract() payable {
//       OAR = OraclizeAddrResolverI(0x904a3eB991FA099D31B1F160006C01460c2D1dD8);
//       OAR = OraclizeAddrResolverI(0x6f485C8BF6fc43eA212E93BBF8ce046C7f1cb475);
       emit LogConstructorInitiated("Constructor was initiated. Call 'updatePrice()' to send the Oraclize Query.");
   }

    // 實現可以往智能合約轉入餘額
    function () payable{

    }

   function __callback(bytes32 myid, string result) {
       mySender = msg.sender;
       myCbAddress = oraclize_cbAddress();
       if (msg.sender != oraclize_cbAddress()) revert();
       ETHUSD = result;
       LogPriceUpdated(result);
   }

    function getUrlPrice() returns (uint price){
        return oraclize_getPrice("URL");
    }

    function getcbAddress() returns (address tmp) {
        return oraclize_cbAddress();
    }

    function getBalance() returns (uint balance){
        return this.balance;
    }

    function getUrlPrice2() public view returns (uint price){
        return oraclize_getPrice("URL");
    }

    function getcbAddress2() public view returns (address tmp) {
        return oraclize_cbAddress();
    }

    function getBalance2() public view returns (uint balance){
        return this.balance;
    }

    function getORIAddress()public view returns (address tmp){
        return OAR.getAddress();
    }

    function getCodeSize2(address _addr) public view returns(uint _size) {
        assembly {
            _size := extcodesize(_addr)
        }
    }

    function oraclize_getPrice2(string datasource) oraclizeAPI public view returns (uint){
        return oraclize.getPrice(datasource);
    }

    function updatePrice2() payable {
        oraclize_query("URL", "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price");
    }

    // examplecontract.updatePrice({from: eth.accounts[0], value: 200000000000000000, gas:200000})
   function updatePrice() payable {
       myUrlPrice = oraclize_getPrice("URL");
       myBalance = this.balance;
       emit LogNewOraclizeQuery("LYH========= update price.");
       if (oraclize_getPrice("URL") > this.balance) {
           emit LogNewOraclizeQuery("Oraclize query was NOT sent, please add some ETH to cover for the query fee");
       } else {
           emit LogNewOraclizeQuery("Oraclize query was sent, standing by for the answer..");
           oraclize_query("URL", "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price");
       }
   }

    //examplecontract.updateBtc({from: eth.accounts[0], value: 200000000000000000, gas:200000})
    function updateBtc() payable {
       myUrlPrice = oraclize_getPrice("URL");
       myBalance = this.balance;
       emit LogNewOraclizeQuery("LYH========= update price.");
       if (oraclize_getPrice("URL") > this.balance) {
           emit LogNewOraclizeQuery("Oraclize query was NOT sent, please add some ETH to cover for the query fee");
       } else {
           emit LogNewOraclizeQuery("Oraclize query was sent, standing by for the answer..");
           oraclize_query("URL", "json(https://www.bitalong.com/api/index/ticker/btc_usdt).last");
       }
   }
}

3, 合約web3deploy代碼(使用solc 0.4.25版本)

var examplecontractContract = web3.eth.contract([{"constant":true,"inputs":[],"name":"getBalance2","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"myUrlPrice","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"getBalance","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"getUrlPrice","outputs":[{"name":"price","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"mylog2","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"myid","type":"bytes32"},{"name":"result","type":"string"}],"name":"__callback","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"getcbAddress","outputs":[{"name":"tmp","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"updatePrice2","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"myid","type":"bytes32"},{"name":"result","type":"string"},{"name":"proof","type":"bytes"}],"name":"__callback","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"getUrlPrice2","outputs":[{"name":"price","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getcbAddress2","outputs":[{"name":"tmp","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"getORIAddress","outputs":[{"name":"tmp","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"_addr","type":"address"}],"name":"getCodeSize2","outputs":[{"name":"_size","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"updatePrice","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"ETHUSD","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"myCbAddress","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"updateBtc","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"myBalance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"datasource","type":"string"}],"name":"oraclize_getPrice2","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"mySender","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"mylog1","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":true,"stateMutability":"payable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":false,"name":"nextStep","type":"string"}],"name":"LogConstructorInitiated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"price","type":"string"}],"name":"LogPriceUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"description","type":"string"}],"name":"LogNewOraclizeQuery","type":"event"}]);
var examplecontract = examplecontractContract.new(
   {
     from: web3.eth.accounts[0], 
     data: 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
     gas: '4700000'
   }, function (e, contract){
    console.log(e, contract);
    if (typeof contract.address !== 'undefined') {
         console.log('Contract mined! address: ' + contract.address + ' transactionHash: ' + contract.transactionHash);
    }
 })

4, 挖礦並部署
miner.start(1); admin.sleepBlocks(1); miner.stop()

5, 此時會返回一個合約地址
Contract mined! address: 0x911c8db375034b1b4b313e8714d467348d97a29b transactionHash: 0x36dc8c0bd06d0b0774cc8cbd2f6f66bd0b7b796fa452910f0db1e9111df5c31c

6, 更新價格
examplecontract.updatePrice({from: eth.accounts[0], value: 100000000000000000})

//上面調用沒有指定gas調用，否則會出現 "out of gas" 的情況,防止out of gas可以指定調用的gas
# 在執行指定的 SSTORE 出現 "out of gas"
DEBUG[11-27|02:05:46.668|core/vm/interpreter.go:256]             cost                   err=20000
DEBUG[11-27|02:05:46.668|core/vm/interpreter.go:257]             contract.Gas           err=13620
# 需要20000 當時contract 中只有 13620 

examplecontract.updatePrice({from: eth.accounts[0], value: 200000000000000000, gas:200000})
> examplecontract.updatePrice({from: eth.accounts[0], value: 200000000000000000, gas:200000})
"0xfe5f24f559171d36fb00b8105f973a54d18c2b1282ba1b25c008fea6f99604e2"
> miner.start(1); admin.sleepBlocks(1); miner.stop() 
null
> miner.start(1); admin.sleepBlocks(1); miner.stop()
null
> examplecontract.ETHUSD()
""
> examplecontract.ETHUSD()
""
> miner.start(1); admin.sleepBlocks(1); miner.stop()
null
> examplecontract.ETHUSD()
"105.68000000"

7, 兩次挖礦解讀
由於oraclize中刷新ETHUSD 是異步調用，導致第一次挖礦只是實現了轉賬的功能，
   第二次挖礦，oraclize異步調用，將數據回填到callback方法中的 ETHUSD。

四、在ethereum-bridge中，可以看到有數據調用
以下爲打印的輸出

# ethereum-bridge -H localhost:8545 -a 1 
Please wait...
[2018-11-27T06:59:07.211Z] INFO you are running ethereum-bridge - version: 0.6.1
[2018-11-27T06:59:07.214Z] INFO saving logs to: ./bridge.log
[2018-11-27T06:59:07.215Z] INFO using active mode
[2018-11-27T06:59:07.216Z] INFO Connecting to eth node http://localhost:8545
[2018-11-27T06:59:11.576Z] INFO connected to node type Geth/TestNode/v1.8.19-unstable-d136e985/linux-amd64/go1.10.3
[2018-11-27T06:59:14.769Z] WARN Using 0x20b91c6536492ade87503de51a5b7edad31149a8 to query contracts on your blockchain, make sure it is unlocked and do not use the same address to deploy your contracts
[2018-11-27T06:59:15.324Z] INFO deploying the oraclize connector contract...
[2018-11-27T07:00:03.045Z] INFO connector deployed to: 0xdc72cafa3ab6aa0931197611d66b47304a7082d0
[2018-11-27T07:00:03.515Z] INFO deploying the address resolver with a deterministic address...
[2018-11-27T07:01:04.824Z] INFO address resolver (OAR) deployed to: 0x6f485c8bf6fc43ea212e93bbf8ce046c7f1cb475
[2018-11-27T07:01:04.825Z] INFO updating connector pricing...
[2018-11-27T07:01:16.707Z] INFO successfully deployed all contracts
[2018-11-27T07:01:16.710Z] INFO instance configuration file saved to /usr/local/lib/node_modules/ethereum-bridge/config/instance/oracle_instance_20181127T020116.json
[2018-11-27T07:01:16.711Z] INFO you are using a deterministic OAR, you don't need to update your contract
[2018-11-27T07:01:17.516Z] INFO Listening @ 0xdc72cafa3ab6aa0931197611d66b47304a7082d0 (Oraclize Connector)

(Ctrl+C to exit)

[2018-11-27T07:16:30.662Z] INFO new Log1 event
{
    "parsed_log": {
        "contract_address": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24",
        "contract_myid": "0x4cd4e11699b7acea3b3cf5c5704ffb987420e016985ec987ab2f47d086b94f0f",
        "datasource": "URL",
        "formula": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
        "timestamp": 0,
        "gaslimit": 200000,
        "proofType": "0x00",
        "gasPrice": 0
    },
    "address": "0xdc72cafa3ab6aa0931197611d66b47304a7082d0",
    "blockNumber": 18,
    "transactionHash": "0x12f2528a4e6a3862dcb8bb76e3025bbb3a1d7f792b56a5aaa8d5220142e5cb13",
    "transactionIndex": 2,
    "blockHash": "0x0eb168a446cd16464282a4cbe433d66c52b736e9667fb8614221b662b98fefa6",
    "logIndex": 2,
    "removed": false,
    "event": "Log1",
    "args": {
        "sender": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24",
        "cid": "0x4cd4e11699b7acea3b3cf5c5704ffb987420e016985ec987ab2f47d086b94f0f",
        "timestamp": {
            "s": 1,
            "e": 0,
            "c": [
                0
            ]
        },
        "datasource": "URL",
        "arg": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
        "gaslimit": {
            "s": 1,
            "e": 5,
            "c": [
                200000
            ]
        },
        "proofType": "0x00",
        "gasPrice": {
            "s": 1,
            "e": 0,
            "c": [
                0
            ]
        }
    },
    "block_timestamp": 1543302987
}
[2018-11-27T07:16:31.153Z] INFO new Log1 event
{
    "parsed_log": {
        "contract_address": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24",
        "contract_myid": "0x705d063419c6342743c9f04fc75795e778ec34afca528a504a2003a697da7c8e",
        "datasource": "URL",
        "formula": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
        "timestamp": 0,
        "gaslimit": 200000,
        "proofType": "0x00",
        "gasPrice": 0
    },
    "address": "0xdc72cafa3ab6aa0931197611d66b47304a7082d0",
    "blockNumber": 18,
    "transactionHash": "0xfe5f24f559171d36fb00b8105f973a54d18c2b1282ba1b25c008fea6f99604e2",
    "transactionIndex": 3,
    "blockHash": "0x0eb168a446cd16464282a4cbe433d66c52b736e9667fb8614221b662b98fefa6",
    "logIndex": 5,
    "removed": false,
    "event": "Log1",
    "args": {
        "sender": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24",
        "cid": "0x705d063419c6342743c9f04fc75795e778ec34afca528a504a2003a697da7c8e",
        "timestamp": {
            "s": 1,
            "e": 0,
            "c": [
                0
            ]
        },
        "datasource": "URL",
        "arg": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
        "gaslimit": {
            "s": 1,
            "e": 5,
            "c": [
                200000
            ]
        },
        "proofType": "0x00",
        "gasPrice": {
            "s": 1,
            "e": 0,
            "c": [
                0
            ]
        }
    },
    "block_timestamp": 1543302987
}
[2018-11-27T07:16:32.940Z] INFO new HTTP query created, id: 03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073
[2018-11-27T07:16:32.962Z] INFO checking HTTP query 03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073 status in 0 seconds
[2018-11-27T07:16:32.964Z] INFO checking HTTP query 03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073 status every 5 seconds...
[2018-11-27T07:16:33.130Z] INFO new HTTP query created, id: f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b
[2018-11-27T07:16:33.134Z] INFO checking HTTP query f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b status in 0 seconds
[2018-11-27T07:16:33.135Z] INFO checking HTTP query f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b status every 5 seconds...
[2018-11-27T07:16:41.619Z] INFO 03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073 HTTP query result: 
{
    "result": {
        "_timestamp": 1543302992,
        "daterange": [
            1543302992,
            1543304792
        ],
        "interval": 3600,
        "id2": "705d063419c6342743c9f04fc75795e778ec34afca528a504a2003a697da7c8e",
        "actions": [],
        "id": "03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073",
        "version": 3,
        "_timestamp_creation": 1543302992,
        "context": {
            "protocol": "eth",
            "relative_timestamp": 1543302987,
            "type": "blockchain",
            "name": "eth_DD16B4DB79"
        },
        "active": true,
        "hidden": false,
        "payload": {
            "conditions": [
                {
                    "query": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
                    "proof_type": 0,
                    "check_op": "tautology",
                    "datasource": "URL",
                    "value": null
                }
            ]
        }
    },
    "success": true
}
[2018-11-27T07:16:45.140Z] INFO f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b HTTP query result: 
	{
    "result": {
        "_timestamp": 1543302992,
        "daterange": [
            1543302992,
            1543304792
        ],
        "interval": 3600,
        "id2": "4cd4e11699b7acea3b3cf5c5704ffb987420e016985ec987ab2f47d086b94f0f",
        "actions": [],
        "id": "f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b",
        "version": 3,
        "_timestamp_creation": 1543302992,
        "context": {
            "protocol": "eth",
            "relative_timestamp": 1543302987,
            "type": "blockchain",
            "name": "eth_DD16B4DB79"
        },
        "active": true,
        "hidden": false,
        "payload": {
            "conditions": [
                {
                    "query": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
                    "proof_type": 0,
                    "check_op": "tautology",
                    "datasource": "URL",
                    "value": null
                }
            ]
        }
    },
    "success": true
}
[2018-11-27T07:16:46.254Z] INFO 03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073 HTTP query result: 
	{
    "result": {
        "_timestamp": 1543303000,
        "id": "03a2a9598659633b3bd7cf919cb98cb6ca0d274ceb5235b3825eb4d21907b073",
        "daterange": [
            1543302992,
            1543304792
        ],
        "_lock": false,
        "id2": "705d063419c6342743c9f04fc75795e778ec34afca528a504a2003a697da7c8e",
        "actions": [],
        "interval": 3600,
        "checks": [
            {
                "errors": [],
                "success": true,
                "timestamp": 1543303000,
                "results": [
                    "105.68000000"
                ],
                "proofs": [
                    null
                ],
                "match": true
            }
        ],
        "version": 3,
        "_timestamp_creation": 1543302992,
        "context": {
            "protocol": "eth",
            "relative_timestamp": 1543302987,
            "type": "blockchain",
            "name": "eth_DD16B4DB79"
        },
        "active": false,
        "hidden": false,
        "payload": {
            "conditions": [
                {
                    "query": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
                    "proof_type": 0,
                    "check_op": "tautology",
                    "datasource": "URL",
                    "value": null
                }
            ]
        }
    },
    "success": true
}
[2018-11-27T07:16:46.272Z] INFO sending __callback tx...
	{
    "contract_myid": "0x705d063419c6342743c9f04fc75795e778ec34afca528a504a2003a697da7c8e",
    "contract_address": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24"
}
[2018-11-27T07:16:47.030Z] INFO f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b HTTP query result: 
	{
    "result": {
        "_timestamp": 1543303003,
        "id": "f978fe6316c57a89c6efb8b2ebf981365fa2084a68d180cb7c11324c9f18058b",
        "daterange": [
            1543302992,
            1543304792
        ],
        "_lock": false,
        "id2": "4cd4e11699b7acea3b3cf5c5704ffb987420e016985ec987ab2f47d086b94f0f",
        "actions": [],
        "interval": 3600,
        "checks": [
            {
                "errors": [],
                "success": true,
                "timestamp": 1543303003,
                "results": [
                    "105.68000000"
                ],
                "proofs": [
                    null
                ],
                "match": true
            }
        ],
        "version": 3,
        "_timestamp_creation": 1543302992,
        "context": {
            "protocol": "eth",
            "relative_timestamp": 1543302987,
            "type": "blockchain",
            "name": "eth_DD16B4DB79"
        },
        "active": false,
        "hidden": false,
        "payload": {
            "conditions": [
                {
                    "query": "json(https://api.pro.coinbase.com/products/ETH-USD/ticker).price",
                    "proof_type": 0,
                    "check_op": "tautology",
                    "datasource": "URL",
                    "value": null
                }
            ]
        }
    },
    "success": true
}
[2018-11-27T07:16:47.039Z] INFO sending __callback tx...
	{
    "contract_myid": "0x4cd4e11699b7acea3b3cf5c5704ffb987420e016985ec987ab2f47d086b94f0f",
    "contract_address": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24"
}
[2018-11-27T07:17:58.280Z] INFO contract 0xb8040821356bc3c84ddbe947a6004a4dc74bfa24 __callback tx sent, transaction hash: 0x3363f29ee643a931f1d614ddc9c97f8742d0a8984dc280b1062338da75cf38eb
	{
    "myid": "0x705d063419c6342743c9f04fc75795e778ec34afca528a504a2003a697da7c8e",
    "result": "105.68000000",
    "proof": null,
    "proof_type": "0x00",
    "contract_address": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24",
    "gas_limit": 200000,
    "gas_price": null
}


[2018-11-27T07:17:58.756Z] INFO contract 0xb8040821356bc3c84ddbe947a6004a4dc74bfa24 __callback tx sent, transaction hash: 0x7628eebcb1b38c8b9f1662a7b61f5f071b6bfb09e08747c2032edc3eb89a61c2
	{
    "myid": "0x4cd4e11699b7acea3b3cf5c5704ffb987420e016985ec987ab2f47d086b94f0f",
    "result": "105.68000000",
    "proof": null,
    "proof_type": "0x00",
    "contract_address": "0xb8040821356bc3c84ddbe947a6004a4dc74bfa24",
    "gas_limit": 200000,
    "gas_price": null
}

[2018-11-27T07:18:45.125Z] INFO transaction hash 0x3363f29ee643a931f1d614ddc9c97f8742d0a8984dc280b1062338da75cf38eb was confirmed in block 0x0955c1985be0750021de9edbbb5155e867ec8f9333cb8f66aa7ab0fb9fc67582
[2018-11-27T07:18:45.597Z] INFO transaction hash 0x7628eebcb1b38c8b9f1662a7b61f5f071b6bfb09e08747c2032edc3eb89a61c2 was confirmed in block 0x0955c1985be0750021de9edbbb5155e867ec8f9333cb8f66aa7ab0fb9fc67582

參考資料：
官網：http://docs.oraclize.it/#home
討論網頁：https://gitter.im/oraclize/ethereum-api?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
oraclize github地址：https://github.com/oraclize/ethereum-api
ethereum-bridge地址：https://github.com/oraclize/ethereum-bridge/