Penny(PNY)

Experimental

0xb9a01c4e217f...d06d723da640

HomesteadExact Bytecode MatchEdit this contract

Deployed May 20, 2016 (10 years ago)Block 1,550,141

Identical-runtime sibling. Standard ethereum.org tutorial token (Homestead, Mar 2016): name/symbol/decimals metadata, a public balanceOf mapping and an overflow

Homestead EraVerified Source

Historical Significance

The canonical 'create your own token' contract from the ethereum.org tutorial, one of the most-copied teaching contracts of the Homestead era.

Context

Compiled with soljson-v0.2.0 (optimizer ON); exact match of the 716-byte runtime. One of 212 byte-identical deployments.

Token Information

Token Name

Penny

Symbol

PNY

Decimals

Key Facts

Deployer

0x003777...a9ba3d

Deployment Block

1,550,141

Deployment Date

May 20, 2016, 05:20 AM

Code Size

716.0 B

Deployment Transaction: 0xebbbe44fcee1a0ca...059a5eb95f67a3ef

Source Verified

SolidityExact bytecode match(716 bytes)

Compiler: soljson

View verification proof

Exact runtime bytecode match. Runtime: 716 bytes (byte-for-byte), compiled with soljson-v0.2.0+commit.4dc2445e, optimizer ON. The on-chain creation (1408 bytes) appends ABI-encoded constructor args (initialSupply, tokenName, decimalUnits, tokenSymbol) to the init code; the 716-byte runtime is the shared cluster invariant.

Historian Categories

Experimental

Heuristic Analysis

The following characteristics were detected through bytecode analysis and may not be accurate.

Detected Type: Experimental

Homestead Era

The first planned hard fork. Removed the canary contract, adjusted gas costs.

Block span: 1,150,000 — 1,919,999

March 14, 2016 — July 20, 2016

Bytecode Overview

Opcodes716

Unique Opcodes95

Jump Instructions32

Storage Operations18

Verified Source Available

Source verified through compiler archaeology and exact bytecode matching.

View Verification Proof

Show source code (Solidity)

contract Token {
    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 Token(uint256 initialSupply, string tokenName, uint8 decimalUnits, string tokenSymbol) {
        balanceOf[msg.sender] = 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);
    }
}

External Links

Etherscan Verified Source (if any)

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