CoinFlipper

Lottery / Gambling

0xb87824547db8...1a602f8642ad

FrontierContract #84Exact Bytecode MatchEdit this contract

Deployed August 8, 2015 (11 years ago)Block 55,627

Timestamp-parity coinflip with balance guard and donate().

Frontier EraVerified Source

Key Facts

Deployer

0xc70ba2...af62e9

Deployment Block

55,627

Deployment Date

Aug 8, 2015, 10:46 PM

Code Size

186.0 B

Gas at Deploy

66,999

Transactions by Year

20157

20261

Deployment Transaction: 0xdbfcd2006dd6f0b7...b484caa6cc124cd4

Description

Timestamp-parity coinflip with balance guard and donate(). Functions include flip() (auto-getter), donate(), fallback. Verified with soljson-v0.1.1+commit.6ff4cd6 and optimizer ON.

Source Verified

SolidityExact bytecode match(186 bytes)

Compiler: soljson

View verification proof

Backfilled from awesome-ethereum-proofs PR #35.

Historian Categories

Lottery / Gambling

Heuristic Analysis

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

Detected Type: Lottery / Gambling

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

Opcodes186

Unique Opcodes55

Jump Instructions13

Storage Operations2

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

// Compiler: solc 0.1.0 --optimize (exact match with solc 0.0.9.27 through 0.1.1, optimized)
// Contract: 0xb87824547db80f1fb37d0225b99f1a602f8642ad
// Deployed: 2015-08-08 (block 55627)
// Match: 100% exact bytecode match (186/186 bytes)
contract CoinFlipper {
    uint256 public flip;
    function donate() {
    }
    function() {
        var v = msg.value;
        var b = address(this).balance;
        if (v > 2 * b) {
            return;
        }
        flip = block.timestamp;
        if (flip % 2 == 0) {
        } else {
            msg.sender.send(2 * v);
        }
    }
}