Oraclize

Unclassified

0xfa4c89731dc8...09fe09733db7

FrontierContract #2,605Exact Bytecode MatchEdit this contract

Deployed October 24, 2015 (11 years ago)Block 433,240

Oraclize connector, 24 Oct 2015: paid queries through a costs() modifier and a balance per caller.

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

433,240

Deployment Date

Oct 24, 2015, 04:08 PM

Code Size

1.9 KB

Gas at Deploy

557,436

Deployment Transaction: 0x4de7a898f5eb7e61...35457a269f2c12fb

Description

Oraclize connector, 24 Oct 2015: paid queries through a costs() modifier and a balance per caller.

Source Verified

SolidityExact bytecode match(1,996 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

Opcodes1,996

Unique Opcodes138

Jump Instructions40

Storage Operations22

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;
    address public cb_address = 0x26588a9301b0428d95e6fc3a5024fce8bec12d51;
    mapping (address => uint) balances;

    event Log1(bytes32 myid, uint timestamp, string datasource, string arg);
    event Log2(bytes32 myid, uint timestamp, string datasource, string arg1, string arg2);

    modifier costs(string datasource) {
        uint price = getPrice(datasource);
        if (msg.value > 0) balances[msg.sender] += msg.value;
        if (balances[msg.sender] >= price) {
            balances[msg.sender] -= price;
            _
        }
    }

    function getPrice(string datasource) returns (uint) {
        return 10;
    }

    function query(uint timestamp, string datasource, string arg) costs(datasource) returns (bytes32 myid) {
        myid = sha3(now + counter);
        counter++;
        Log1(myid, timestamp, datasource, arg);
        return myid;
    }

    function query(uint timestamp, string datasource, string arg1, string arg2) costs(datasource) returns (bytes32 myid) {
        myid = sha3(now + counter);
        counter++;
        Log2(myid, timestamp, datasource, arg1, arg2);
        return myid;
    }
}