0xaf72...2292

Unclassified

0xaf72e3ce5613...9eb07c962292

FrontierContract #2,452Exact Bytecode MatchEdit this contract

Deployed October 23, 2015 (11 years ago)Block 426,834

Oraclize connector, 23 Oct 2015: query() logs the request and returns sha3 of a counter. The first proxy forwards here.

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

426,834

Deployment Date

Oct 23, 2015, 10:35 AM

Code Size

579.0 B

Gas at Deploy

172,982

Deployment Transaction: 0x446e3b51bb3b7f29...6aea5395a825b7ce

Description

Oraclize connector, 23 Oct 2015: query() logs the request and returns sha3 of a counter. The first proxy forwards here.

Source Verified

SolidityExact bytecode match(579 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

Opcodes579

Unique Opcodes78

Jump Instructions11

Storage Operations5

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 Oraclize {
    uint counter = 0;

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

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