Oraclize

Unclassified

0xd4cb3eb955e0...a7f3104ee70d

FrontierContract #2,389Exact Bytecode MatchEdit this contract

Deployed October 22, 2015 (11 years ago)Block 422,061

Oraclize connector prototype, 22 Oct 2015: query() logs the request and returns 1; no storage.

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

422,061

Deployment Date

Oct 22, 2015, 12:10 PM

Code Size

533.0 B

Gas at Deploy

157,685

Deployment Transaction: 0xc676ccbb56a39368...b7274ba9e52b81f3

Description

Oraclize connector prototype, 22 Oct 2015: query() logs the request and returns 1; no storage.

Source Verified

SolidityExact bytecode match(533 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

Opcodes533

Unique Opcodes75

Jump Instructions10

Storage Operations1

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

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