MyToken

Token

0x285478fd9607...1e2c1cc0aa74

DAO ForkContract #24KExact Bytecode MatchEdit this contract

Deployed September 23, 2016 (10 years ago)Block 2,311,316

An ethereum.org tutorial token deployed with no name and no symbol, with a fixed supply and direct transfers only.

DAO Fork EraVerified Source

Historical Significance

The ethereum.org token tutorial is where most people who deployed a token in this period started, and this is its opening form: a balance mapping, a guarded subtraction and the metadata a wallet needs to show a name. It has no allowance, so nothing can spend on a holder's behalf and no exchange or escrow can be given a limit. That gap is exactly what ERC-20 was written to close, and copies like this one are the before picture.

This deployment left the name and the symbol empty. Both are set once in the constructor and no function changes them, so the token has no display identity of any kind and never will: a wallet holding it can only ever show its address.

Context

Frontier and Homestead era token deployment.

Token Information

Decimals

Key Facts

Deployer

0x5ea7f9...c62b7f

Deployment Block

2,311,316

Deployment Date

Sep 23, 2016, 01:10 PM

Code Size

1.2 KB

Gas at Deploy

436,111

Deployment Transaction: 0x4535e132937e64bf...388f16a8d98b0d9f

Description

A fixed-supply token supporting direct transfers only. Deployed September 2016 by 0x5ea7f983326effbc2a4297ada5e9c799c1c62b7f.

Source Verified

Exact bytecode match(1,250 bytes)

Compiler: v0.4.0+

View verification proof

Heuristic Analysis

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

Detected Type: Token

Has ERC-20-like patterns

DAO Fork Era

The controversial fork to recover funds from The DAO hack.

Block span: 1,920,000 — 2,462,999

July 20, 2016 — October 18, 2016

Bytecode Overview

Opcodes1,250

Unique Opcodes104

Jump Instructions48

Storage Operations19

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

Verified on Etherscan

View Verification Proof

Show source code (Solidity)

// Submitted by EthereumHistory (ethereumhistory.com)
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 _supply, string _name, uint8 _decimals, string _symbol) {
    balanceOf[msg.sender] = _supply;
    name = _name;
    symbol = _symbol;
    decimals = _decimals;
  }
  function transfer(address _to, uint256 _value) {
    if (balanceOf[msg.sender] < _value || 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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