Standard Token 0.1 template with approveAndCall and correct transferFrom. One of 103 identical deployments.
Historical Significance
The corrected version of the ethereum.org token template. Shows the evolution of token standards before ERC-20 formalization.
Token Information
Key Facts
Description
The ethereum.org standard token template (Token 0.1) with transferFrom correctly emitting Transfer(_from, _to, _value). Unlike the Poker Chips variant which has a bug emitting Transfer(msg.sender, ...), this version properly logs the token sender in transferFrom events.
Includes: name, symbol, decimals, totalSupply, balanceOf, allowance, transfer, transferFrom, approveAndCall.
Source Verified
Exact runtime bytecode match. Native C++ solc v0.2.1 (webthree-umbrella v1.1.2), optimizer ON. 103 identical siblings. Correct transferFrom event (Transfer(_from,...) not Transfer(msg.sender,...)).
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Homestead Era
The first planned hard fork. Removed the canary contract, adjusted gas costs.
Bytecode Overview
Verified Source Available
Source verified through compiler archaeology and exact bytecode matching.
View Verification ProofShow source code (Solidity)
contract tokenRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes _extraData); }
contract MyToken {
string public standard = "Token 0.1";
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
event Transfer(address indexed from, address indexed to, uint256 value);
function MyToken(uint256 initialSupply, string tokenName, uint8 decimalUnits, string tokenSymbol) {
balanceOf[msg.sender] = initialSupply;
totalSupply = 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);
}
function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
allowance[msg.sender][_spender] = _value;
tokenRecipient spender = tokenRecipient(_spender);
spender.receiveApproval(msg.sender, _value, this, _extraData);
return true;
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balanceOf[_from] < _value) throw;
if (balanceOf[_to] + _value < balanceOf[_to]) throw;
if (_value > allowance[_from][msg.sender]) throw;
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
allowance[_from][msg.sender] -= _value;
Transfer(_from, _to, _value);
return true;
}
function () {
throw;
}
}