Sha3Block

Unclassified

0x6837afb9e9fc...dba55a87ea27

FrontierContract #204Exact Bytecode MatchEdit this contract

Deployed August 12, 2015 (11 years ago)Block 76,425

Single view function returning `sha3(blockhash(n))`.

Frontier EraVerified Source

Key Facts

Deployer

0xfd2605...7f9e8c

Deployment Block

76,425

Deployment Date

Aug 12, 2015, 10:59 PM

Code Size

144.0 B

Gas at Deploy

54,067

Deployment Transaction: 0x2813d711309b4188...1fb8bfb106834c2b

Description

Single view function returning sha3(blockhash(n)). Functions include sha(uint256). Verified with soljson-v0.1.1+commit.6ff4cd6 and optimizer OFF.

Source Verified

SolidityExact bytecode match(144 bytes)

Compiler: soljson

View verification proof

Backfilled from awesome-ethereum-proofs PR #31.

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

Opcodes144

Unique Opcodes33

Jump Instructions5

Storage Operations1

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

// Reconstructed source for 0x6837afb9e9fc1a908f9ce54756d3dba55a87ea27
// Compiler: solc 0.1.0 (no optimization)
// Match: 100% bytecode match against creation_bytecode.bin

contract C {
    function sha(uint256 amount) returns (bytes32 r) {
        r = sha3(block.blockhash(amount));
    }
}

External Links

Etherscan Verified Source (if any)

Related contracts

Lottery

Same deployer

The first draft of the EarlyLottery commit-reveal lottery, deployed on 8 August 2015 a few hours before its rewrite.

0xf6bf0e...ec3b5cAugust 8, 2015

EarlyLottery

Same deployer

Commit-reveal lottery prototype deployed on 8 August 2015, the earlier draft of the EarlyLottery contract by the same developer.

0x7573ac...ad9fb4August 8, 2015

Sha3

Same deployer

A tiny utility contract that returns the SHA3 hash of a uint256 input.

0xb179a8...4bf09dAugust 9, 2015

Sha3

Same deployer

A tiny utility contract that returns the SHA3 hash of a uint256 input.

0x82000e...b0690aAugust 9, 2015

Sha3

Same deployer

A tiny utility contract that returns the SHA3 hash of a uint256 input.

0x627a6e...25bce8August 9, 2015

LotteryPrototype

Same deployer

The first lottery contract deployed on Ethereum mainnet, created August 9, 2015 by one of the earliest recorded Ethereum users. Built, tested with two participa

0xcdd192...1b622cAugust 9, 2015