Unnamed token deployed at block 2,505,561 from the MyToken gist used by the ethereum.org token tutorial.
Context
Frontier and Homestead era token deployment.
Token Information
Key Facts
Description
This is an unnamed ERC-20 style token contract deployed at block 2,505,561. Its runtime and creation bytecode both match the MyToken gist used by the ethereum.org token tutorial compiled with solc v0.4.0+commit.acd334c9 (optimizer on), byte for byte. 10 contracts on mainnet share this exact runtime bytecode, so one source verifies all of them.
Source Verified
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Tangerine Whistle Era
Emergency fork to address DoS attacks. Repriced IO-heavy opcodes.
Bytecode Overview
Verified Source Available
Source verified through compiler archaeology and exact bytecode matching.
View Verification ProofShow source code (Solidity)
// Submitted by EthereumHistory (ethereumhistory.com)
/**
*Submitted for verification at Etherscan.io on 2025-05-23
*/
contract MyToken {
/* Public variables of the token */
string public name;
string public symbol;
uint8 public decimals;
/* This creates an array with all balances */
mapping (address => uint256) public balanceOf;
/* This generates a public event on the blockchain that will notify clients */
event Transfer(address indexed from, address indexed to, uint256 value);
/* Initializes contract with initial supply tokens to the creator of the contract */
function MyToken(uint256 _supply, string _name, string _symbol, uint8 _decimals) {
/* if supply not given then generate 1 million of the smallest unit of the token */
if (_supply == 0) _supply = 1000000;
/* Unless you add other functions these variables will never change */
balanceOf[msg.sender] = _supply;
name = _name;
symbol = _symbol;
/* If you want a divisible token then add the amount of decimals the base unit has */
decimals = _decimals;
}
/* Send coins */
function transfer(address _to, uint256 _value) {
/* if the sender doenst have enough balance then stop */
if (balanceOf[msg.sender] < _value) throw;
if (balanceOf[_to] + _value < balanceOf[_to]) throw;
/* Add and subtract new balances */
balanceOf[msg.sender] -= _value;
balanceOf[_to] += _value;
/* Notifiy anyone listening that this transfer took place */
Transfer(msg.sender, _to, _value);
}
}External Links
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