CoinStub

Token

0x4fb5acbe16ff...4c7e253b08ae

FrontierContract #40Exact Bytecode MatchEdit this contract

Deployed August 8, 2015 (11 years ago)Block 54,126

Coin tutorial stub — mapping getter + empty function returning default bool.

Frontier EraVerified Source

Historical Significance

One of the earliest deployments of the ethereum.org Coin tutorial on mainnet. The empty sendCoin body reveals a developer exploring the Solidity contract model before implementing transfer logic - a snapshot of the learning process on Frontier Ethereum.

Context

The ethereum.org Coin tutorial was one of the first Solidity examples published by the Ethereum Foundation. This deployment shows a developer working through the tutorial in August 2015, deploying the contract structure before filling in the implementation.

Key Facts

Deployer

0x4b0c6f...238990

Deployment Block

54,126

Deployment Date

Aug 8, 2015, 03:53 PM

Code Size

200.0 B

Gas at Deploy

68,369

Deployment Transaction: 0x2740e6ca150ccd0d...413b31b126d807cc

Description

Coin tutorial stub — mapping getter + empty function returning default bool. Functions include coinBalanceOf(address) (auto-getter), sendCoin(address,uint256). Verified with soljson-v0.1.1+commit.6ff4cd6 and optimizer OFF.

Source Verified

SolidityExact bytecode match(200 bytes)

Compiler: soljson

View verification proof

Backfilled from awesome-ethereum-proofs PR #30.

Heuristic Analysis

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

Detected Type: Token

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

Opcodes200

Unique Opcodes40

Jump Instructions9

Storage Operations1

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

contract C {

    mapping(address => uint256) public coinBalanceOf;

    function C() {
    }

    function sendCoin(address to, uint256 amount) returns (bool r) {
    }

}

External Links

Etherscan Verified Source (if any)

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