0x9ce8...0607

Unclassified

0x9ce818b623b8...1687e93b0607

FrontierContract #2,599Exact Bytecode MatchEdit this contract

Deployed October 24, 2015 (11 years ago)Block 433,173

Oraclize test from October 2015 that asks ShapeShift, through the oracle, for an ETH-to-BTC deposit address and parses the reply onchain.

Frontier EraVerified Source

Historical Significance

An early form of Oraclize's StopLoss example, which pairs a price feed with an automatic ShapeShift conversion. It shows the oracle making a POST request to an exchange API less than three months after mainnet launch. Source reconstructed from bytecode; exact creation match.

Context

Deployed on 24 October 2015 by the Oraclize operator account. The Oraclize address comes from a resolver contract at 0xda0181a763b533e532248f6ff859e564a470d9aa deployed earlier the same day, and the four-argument POST query was still an overload of query() (later renamed query2). The contract has since self-destructed; the source is proven against its deploy transaction.

Key Facts

Deployer

0x0047a8...884de8

Deployment Block

433,173

Deployment Date

Oct 24, 2015, 03:51 PM

Code Size

2.9 KB

Gas at Deploy

598,139

Transactions by Year

20151

20179

Deployment Transaction: 0xa55ed47e7c393dfe...5468a842a903eb6b

Description

On deployment the contract asks Oraclize to POST {"pair": "eth_btc", "amount": "0.2", "withdrawal": "1AAcCo21EUc1jbocjssSQDzLna9Vem2UN5"} to ShapeShift's sendamount endpoint and return success.deposit. __callback() accepts the reply only from the connector's cb_address(), parses the hex deposit address character by character into an address and stores it in shapeshift_address. The fee is paid with a plain send of getPrice("URL") to the connector before the query. kill() self-destructs to the caller.

Source Verified

SolidityExact bytecode match(2,979 bytes)

Compiler: v0.1.6+

View verification proof

Heuristic Analysis

The following characteristics were detected through bytecode analysis and may not be accurate.

Detected Type: Unclassified

Frontier Era

The initial release of Ethereum. A bare-bones implementation for technical users.

Block span: 0 — 1,149,999

July 30, 2015 — March 14, 2016

Bytecode Overview

Opcodes2,979

Unique Opcodes137

Jump Instructions83

Storage Operations27

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract OraclizeI {
    function query(uint _timestamp, string _datasource, string _arg1, string _arg2) returns (bytes32 _id);
    function getPrice(string _datasource) returns (uint _dsprice);
    function cb_address() returns (address _cbAddress);
}
contract OraclizeAddrResolverI {
    function getAddress() returns (address _addr);
}
contract usingOraclize {
    address oraclize_addr = OraclizeAddrResolverI(0xda0181a763b533e532248f6ff859e564a470d9aa).getAddress();
    OraclizeI oraclize = OraclizeI(oraclize_addr);
}

contract StopLoss is usingOraclize {
    address public shapeshift_address;

    function StopLoss() {
        update();
    }

    function __callback(bytes32 myid, string result) {
        if (msg.sender != oraclize.cb_address()) throw;
        bytes memory tmp = bytes(result);
        uint160 ishapeshift = 0;
        uint160 b1;
        uint160 b2;
        for (uint i=2; i<2+2*20; i+=2){
            ishapeshift *= 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;
            ishapeshift += (b1*16+b2);
        }
        shapeshift_address = address(ishapeshift);
    }

    function update() {
        oraclize_addr.send(oraclize.getPrice("URL"));
        oraclize.query(0, "URL", "json(https://shapeshift.io/sendamount).success.deposit", '{"pair": "eth_btc", "amount": "0.2", "withdrawal": "1AAcCo21EUc1jbocjssSQDzLna9Vem2UN5"}');
    }

    function kill(){
        suicide(msg.sender);
    }
}