0x5d3f...6d47

Token

0x5d3ffbb1de19...2fd7b1af6d47

FrontierContract #7,588Exact Bytecode MatchEdit this contract

Deployed February 1, 2016 (10 years ago)Block 936,943

Basic ethereum.org token template with name, symbol, decimals, balanceOf, and transfer.

Frontier EraVerified Source

Historical Significance

The entry-level token template that taught thousands of developers to create tokens on Ethereum.

Context

Ethereum's Frontier network went live on 30 July 2015. Contracts were compiled and deployed from the geth console, there was no test network in common use, and the material people copied from was the ethereum.org tutorials, the Solidity documentation and the go-ethereum wiki. Almost everything deployed in these months is somebody trying the tools.

Token Information

Decimals

Key Facts

Deployer

0xe2f956...9b33ce

Deployment Block

936,943

Deployment Date

Feb 1, 2016, 10:47 AM

Code Size

1.3 KB

Gas at Deploy

306,593

Deployment Transaction: 0xa167417150e79f2f...04942c3004f8919d

Description

The simplest token contract from the official ethereum.org tutorials. Implements basic token functionality: name, symbol, decimals, balanceOf mapping, and transfer with overflow checking. No approve/transferFrom (pre-ERC-20 standardization). This is the token template of early 2016, copied as it stands.

Source Verified

SolidityExact bytecode match(1,374 bytes)

Compiler: v0.2.1

View verification proof

Exact runtime bytecode match. Native C++ solc v0.2.1 (webthree-umbrella v1.1.2), optimizer ON. 200 identical siblings.

Historian Categories

Token

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

Opcodes1,374

Unique Opcodes130

Jump Instructions55

Storage Operations35

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

contract MyToken {
    string public name;
    string public symbol;
    uint8 public decimals;
    mapping (address => uint256) public balanceOf;

    event Transfer(address indexed from, address indexed to, uint256 value);

    function MyToken(uint256 initialSupply, string tokenName, uint8 decimalUnits, string tokenSymbol) {
        balanceOf[msg.sender] = initialSupply;
        name = tokenName;
        symbol = tokenSymbol;
        decimals = decimalUnits;
    }

    function transfer(address _to, uint256 _value) {
        if (balanceOf[msg.sender] < _value) throw;
        if (balanceOf[_to] + _value < balanceOf[_to]) throw;
        balanceOf[msg.sender] -= _value;
        balanceOf[_to] += _value;
        Transfer(msg.sender, _to, _value);
    }
}

External Links

Etherscan Verified Source (if any)

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