Oraclize

Unclassified

0xd0b4fc8908d9...9f20ae493384

FrontierContract #2,456Exact Bytecode MatchEdit this contract

Deployed October 23, 2015 (11 years ago)Block 426,931

Oraclize connector, 23 Oct 2015: query id becomes sha3(now + counter) and is included in the logged request.

Frontier EraVerified Source

Historical Significance

Part of the earliest onchain history of Oraclize, the first widely used oracle service on Ethereum. Source reconstructed from bytecode; exact runtime and creation match with solc v0.1.6, verified on Etherscan and Sourcify.

Context

Deployed by the Oraclize operator account (0x0047a8033cc6d6ca2ed5044674fd421f44884de8) between 22 and 24 October 2015, while Thomas Bertani was building the Oraclize service onchain, weeks before Oraclize published its API in December 2015. Over those three days the connector went from a query() that only emitted a log event, through forwarding proxies and address resolvers, to a connector that charged per query and let callers withdraw their balance.

Key Facts

Deployer

0x0047a8...884de8

Deployment Block

426,931

Deployment Date

Oct 23, 2015, 11:03 AM

Code Size

594.0 B

Gas at Deploy

177,002

Deployment Transaction: 0xefa00d8ed814a6ce...0bc098065c0de590

Description

Oraclize connector, 23 Oct 2015: query id becomes sha3(now + counter) and is included in the logged request.

Source Verified

SolidityExact bytecode match(594 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

Opcodes594

Unique Opcodes80

Jump Instructions12

Storage Operations4

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
contract Oraclize {
    uint counter = 0;

    event Log(bytes32 myid, uint timestamp, string datasource, string arg);

    function query(uint timestamp, string datasource, string arg) returns (bytes32 myid) {
        myid = sha3(now + counter);
        counter++;
        Log(myid, timestamp, datasource, arg);
        return myid;
    }
}