0xfa51...051d

Unclassified

0xfa5186a0af28...880b01b2051d

FrontierContract #2,461Exact Bytecode MatchEdit this contract

Deployed October 23, 2015 (11 years ago)Block 427,002

Oraclize proxy used by PriceTicker 0x29599b97, 23 Oct 2015: forwards calls and stores the last query id in lasthash.

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

427,002

Deployment Date

Oct 23, 2015, 11:22 AM

Code Size

804.0 B

Gas at Deploy

254,663

Transactions by Year

20151

Deployment Transaction: 0xd646df171a859c9d...8730d4534ded40e7

Description

Oraclize proxy used by PriceTicker 0x29599b97, 23 Oct 2015: forwards calls and stores the last query id in lasthash.

Source Verified

SolidityExact bytecode match(804 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

Opcodes804

Unique Opcodes109

Jump Instructions20

Storage Operations19

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;
    address public cb_address = 0x26588a9301b0428d95e6fc3a5024fce8bec12d51;
    address addr;
    bytes32 public lasthash;
    address owner = 0x0047a8033cc6d6ca2ed5044674fd421f44884de8;

    function Oraclize() {
        addr = 0xaf72e3ce56131a9c1a6831b2f0789eb07c962292;
    }

    function changeAddr(address newaddr) {
        if (msg.sender != owner) throw;
        addr = newaddr;
    }

    function() returns (bytes32) {
        lasthash = sha3(now + counter);
        counter++;
        addr.call(msg.data);
        return lasthash;
    }
}