My DAO Shares(%)

Token

0xcbee2eb2a130...0608ae36ee4f

Tangerine WhistleContract #25KExact Bytecode MatchEdit this contract

Deployed October 18, 2016 (9 years ago)Block 2,463,636

A fixed-supply token with direct transfers only, deployed October 2016.

Tangerine Whistle 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.

Context

Frontier and Homestead era token deployment.

Token Information

Token Name

My DAO Shares

Symbol

Decimals

Key Facts

Deployer

0x3d95f7...f3d034

Deployment Block

2,463,636

Deployment Date

Oct 18, 2016, 07:44 PM

Code Size

781.0 B

Gas at Deploy

371,409

Deployment Transaction: 0x0fa7f68ef77e6ade...fc4d12b6d62192a4

Description

A token from the ethereum.org tutorial. Balances sit in a public balanceOf mapping and transfer(to, value) moves them, throwing rather than returning false when the sender is short and checking the recipient's balance for overflow before adding to it. There is no owner and no way to create further units: the supply written at deployment is the whole supply. It was deployed as My DAO Shares, with the symbol % and 2 decimal places.

Source Verified

Exact bytecode match(781 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

Tangerine Whistle Era

Emergency fork to address DoS attacks. Repriced IO-heavy opcodes.

Block span: 2,463,000 — 2,674,999

October 18, 2016 — November 22, 2016

Bytecode Overview

Opcodes781

Unique Opcodes99

Jump Instructions36

Storage Operations15

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, string _symbol, uint8 _decimals) {
    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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