Bytecode verified via sibling
This contract shares identical runtime bytecode with Unicorns (0x59a273f7...) which has been verified through compiler archaeology.
The first of eleven Unicorns token deployments
Token Information
Key Facts
Description
Alex deployed 11 Unicorns token contracts, mostly with no to extremely minor constructor tweaks, before landing on the final one. This was the first of the eleven.
Source Verified
Compiler identified: soljson-v0.2.0-nightly.2016.1.13+commit.d2f18c73. Source structure fully reconstructed (owned base contract + MyToken is owned). Compiles to correct byte size. Two small optimizer instruction-ordering regions differ from on-chain bytecode - not resolvable without the exact build of this compiler.
Heuristic Analysis
The following characteristics were detected through bytecode analysis and may not be accurate.
Frontier Era
The initial release of Ethereum. A bare-bones implementation for technical users.
Bytecode Overview
Verified Source Available
Source verified through compiler archaeology (near-exact bytecode match).
View Verification ProofShow source code (Solidity)
contract MyToken {
address public owner;
string public name;
string public symbol;
uint8 public decimals;
uint256 public totalSupply;
mapping (address => uint256) public balanceOf;
mapping (address => bool) public frozenAccount;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => mapping (address => uint256)) public spentAllowance;
event Transfer(address indexed from, address indexed to, uint256 value);
event FrozenFunds(address target, bool frozen);
function MyToken(uint256 initialSupply, string tokenName, uint8 decimalUnits, string tokenSymbol, address centralMinter) {
if(centralMinter != 0 ) owner = centralMinter;
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;
if (frozenAccount[msg.sender]) throw;
balanceOf[msg.sender] -= _value;
balanceOf[_to] += _value;
Transfer(msg.sender, _to, _value);
}
function approve(address _spender, uint256 _value) returns (bool success) {
allowance[msg.sender][_spender] = _value;
}
function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
if (balanceOf[_from] < _value) throw;
if (balanceOf[_to] + _value < balanceOf[_to]) throw;
if (frozenAccount[_from]) throw;
if (spentAllowance[_from][msg.sender] + _value > allowance[_from][msg.sender]) throw;
balanceOf[_from] -= _value;
balanceOf[_to] += _value;
spentAllowance[_from][msg.sender] += _value;
Transfer(msg.sender, _to, _value);
/* no explicit return true */
}
function mintToken(address target, uint256 mintedAmount) {
if (msg.sender != owner) throw;
balanceOf[target] += mintedAmount;
totalSupply += mintedAmount;
Transfer(owner, target, mintedAmount);
}
function freezeAccount(address target, bool freeze) {
if (msg.sender != owner) throw;
frozenAccount[target] = freeze;
FrozenFunds(target, freeze);
}
function transferOwnership(address newOwner) {
if (msg.sender != owner) throw;
owner = newOwner;
}
function() {
owner.send(msg.value);
}
}