Controller

Experimental

0x3c94923400cc...fca06fe332e5

FrontierContract #1,196Exact Bytecode MatchEdit this contract

Deployed September 17, 2015 (10 years ago)Block 247,976

Controller contract.

Frontier EraVerified Source

Historical Significance

Controller is an early example of the contract-routing pattern: a lightweight proxy that forwards calls to a target address with access control. This pattern is ubiquitous in modern DeFi and NFT contracts but was novel in September 2015. Its role as the admin gate for Pool5x also shows early experimentation with cross-contract access control.

Context

Deployed seven weeks after Ethereum mainnet launch, during the first wave of intensive contract experimentation by the Oraclize team. Solidity v0.1.1 was the current compiler. The three-contract forwarding chain (Pool5x -> Controller -> target) foreshadows the proxy patterns that would later become standard for upgradable contracts (EIP-1967, OpenZeppelin proxies).

Key Facts

Deployer

0x0047a8...884de8

Deployment Block

247,976

Deployment Date

Sep 17, 2015, 01:36 PM

Code Size

214.0 B

Gas at Deploy

85,142

Transactions by Year

20151

Deployment Transaction: 0xb4cb9eb30270f412...21fc114bfceec366

Description

Verified with soljson-v0.1.1+commit.6ff4cd6 and optimizer ON.

Source Verified

SolidityExact bytecode match(214 bytes)

Compiler: soljson

View verification proof

Backfilled from awesome-ethereum-proofs PR #48.

Historian Categories

Experimental

Heuristic Analysis

The following characteristics were detected through bytecode analysis and may not be accurate.

Detected Type: Experimental

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

Opcodes214

Unique Opcodes70

Jump Instructions7

Storage Operations3

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

contract T {
    function set(uint256 x);
}

contract Controller {
    T target = T(0x9e0ae8ffd946d12d1d393c6f3bca0eecadc9428e);

    function set(uint256 x) {
        T t = target;
        t.set(x);
    }

    function get() returns (uint8) {
        return 0xff;
    }
}