Dori Token(%)

Token

0xd6d64e5f72a7...a3a4a564a9da

DAO ForkContract #24KExact Bytecode MatchEdit this contract

Deployed September 28, 2016 (9 years ago)Block 2,343,621

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

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.

Context

Frontier and Homestead era token deployment.

Token Information

Token Name

Dori Token

Symbol

Decimals

Key Facts

Deployer

0x2de1bb...675e44

Deployment Block

2,343,621

Deployment Date

Sep 28, 2016, 09:29 PM

Code Size

751.0 B

Gas at Deploy

363,041

Transactions by Year

20261

Deployment Transaction: 0xed5271201da24948...0f4871cdd47fe146

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 Dori Token, with the symbol % and 6 decimal places.

Source Verified

Exact bytecode match(751 bytes)

Compiler: v0.3.5-

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

Opcodes751

Unique Opcodes103

Jump Instructions30

Storage Operations15

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

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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