Contract 0xd958b51bc953...156e8aec4c9f

Token

0xd958b51bc953...156e8aec4c9f

FrontierContract #15Exact Bytecode MatchEdit this contract

Deployed August 7, 2015 (11 years ago)Block 49,888

Ethereum.org tutorial Coin contract deployed on Frontier day 1. Contains a bug: balance(address) ignores its argument and returns msg.sender balance.

Frontier EraVerified Source

Key Facts

Deployer

Linagee(0x3d0768...116c2d)

Deployment Block

49,888

Deployment Date

Aug 7, 2015, 08:50 PM

Code Size

708.0 B

Gas at Deploy

205,985

Transactions by Year

20153

Deployment Transaction: 0x9c7f30164e2b0ab3...9274f7cdba13c1af

Source Verified

SolidityExact bytecode match(708 bytes)

Compiler: soljson

View verification proof

Exact bytecode match. Creation 708 bytes, runtime 607 bytes. Classic ethereum.org tutorial Coin contract with a bug: balance(address) ignores its argument.

Heuristic Analysis

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

Detected Type: Token

Has ERC-20-like patterns

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

Opcodes708

Unique Opcodes92

Jump Instructions18

Storage Operations10

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

contract Coin {
    mapping (address => uint) public coinBalanceOf;
    event CoinTransfer(address sender, address receiver, uint amount);

    function Coin(uint amount) {
        coinBalanceOf[msg.sender] = 1000000;
    }

    function sendCoin(address receiver, uint amount) returns(uint sufficient) {
        if (coinBalanceOf[msg.sender] < amount) return 0;
        coinBalanceOf[msg.sender] -= amount;
        coinBalanceOf[receiver] += amount;
        CoinTransfer(msg.sender, receiver, amount);
        return 1;
    }

    function balance(address addr) returns (uint) {
        return coinBalanceOf[msg.sender];
    }
}

External Links

Etherscan Verified Source (if any)

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