Moose Factory

0x42dd263af905...478407351457

DAO ForkExact Bytecode MatchEdit this contract

Deployed September 19, 2016 (9 years ago)Block 2,284,575

Vitalik's CREATE factory: pre-computes child address via RLP([self,0]), deploys moose.se, calls moose() to verify, emits Lol event

DAO Fork EraVerified Source

Key Facts

Deployer

Vitalik Buterin(0x1db343...fa6ee6)

Deployment Block

2,284,575

Deployment Date

Sep 19, 2016, 12:20 AM

Code Size

293.0 B

Deployment Transaction: 0xce872333965ba0a4...42e1604f6ea55743

Description

Deployed by Vitalik Buterin. A CREATE factory demonstration: it pre-computes the child contract address via RLP([self, nonce]) and deploys a child contract (moose.se). Illustrates deterministic contract address derivation.

Source Verified

SerpentExact bytecode match(293 bytes)

Compiler: Serpent

View verification proof

Compiled with Serpent 2.0.7. Trailing 4 dead bytes (5b6000f3) stripped before deployment. Source: factory.se + moose.se.

DAO Fork Era

The controversial fork to recover funds from The DAO hack.

Block span: 1,920,000 — 2,462,999

July 20, 2016 — October 18, 2016

Bytecode Overview

Opcodes293

Unique Opcodes84

Jump Instructions9

Storage Operations1

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Serpent)

# factory.se
event Lol(x:int256, y:int256)
extern moose_contract: [moose:[]:int256]
temp = (0xd694000000000000000000000000000000000000000000 + self * 0x100) + 0x80
z = ~extcodesize(temp)
x = create('moose.se')
y = x.moose()
unless (iszero(z or iszero(y))):
    invalid()
log(type=Lol, z, y)

# moose.se
def moose():
    return(extcodesize(self) * codesize())

External Links

Etherscan Verified Source (if any)

Related contracts

SerpentGamble

Same deployer

Provably-fair betting game where players choose their own odds. The owner settles bets with a commit-reveal random seed. Includes a 2-day emergency refund.

0x034df8...200e2fSeptember 20, 2015

SerpentGamble

Same deployer

Sibling of 0x034dF870 (SerpentGamble). Provably-fair Serpent betting game; players choose their own odds, owner settles via commit-reveal seed, 2-day refund.

0x9ca7e9...fa8bb4September 21, 2015

SerpentGamble

Same deployer

Sibling of 0x034dF870 (SerpentGamble). Provably-fair Serpent betting game; players choose their own odds, owner settles via commit-reveal seed, 2-day refund.

0x75649a...176028September 21, 2015

SerpentGamble

Same deployer

Intermediate build of serpent_gamble, a provably-fair betting dapp (Bet/Win/Loss/NewSeed), related to verified sibling 0x59375871. Source not yet reconstructed.

0xe1a99f...0d2457September 21, 2015

SerpentGamble

Same deployer

Intermediate build of serpent_gamble, a provably-fair betting dapp (Bet/Win/Loss/NewSeed), related to verified sibling 0x59375871. Source not yet reconstructed.

0xdc00a9...15861fSeptember 21, 2015

SerpentGamble

Same deployer

Intermediate build of serpent_gamble, a provably-fair betting dapp (Bet/Win/Loss/NewSeed), related to verified sibling 0x59375871. Source not yet reconstructed.

0xd0ed09...300b48September 21, 2015