0xa1f3...3fb0

Token

0xa1f326c1271f...155656473fb0

FrontierContract #2,869Exact Bytecode MatchEdit this contract

Bytecode verified via sibling

This contract shares identical runtime bytecode with a verified contract (0x88fc9a87...) which has been verified through compiler archaeology.

Deployed October 27, 2015 (10 years ago)Block 447,363

A two-function token, one identifier apart from its twin

Frontier EraVerified Source

Context

Frontier and Homestead era deployment.

Key Facts

Deployer

0xb1a2b4...42d382

Deployment Block

447,363

Deployment Date

Oct 27, 2015, 11:03 AM

Code Size

774.0 B

Gas at Deploy

212,327

Deployment Transaction: 0x8f9278689c95fb50...173a300a604acb04

Description

A minimal token: one public mapping of balances, a transfer that returns false rather than throwing when the sender is short, and a Transfer event. It is the same contract published at 0x00576287d3263ba831c8cf0886f06537e0515a2c with one identifier changed - the public mapping is called balances there and balanceOf here, or the other way round depending which you read first - and that single rename moves the generated getter from balanceOf(address) to balances(address), which is the whole of the twelve bytes separating the two deployments. The contract kept its own name: MyToken(uint) never reaches the dispatcher, so it is still the constructor. Both copies came from the same deployer twelve blocks apart.

Source Verified

Exact bytecode match(774 bytes)

Compiler: v0.1.6+

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Heuristic Analysis

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

Detected Type: Token

Has ERC-20-like patterns

Frontier Era

The initial release of Ethereum. A bare-bones implementation for technical users.

Block span: 0 — 1,149,999

July 30, 2015 — March 14, 2016

Bytecode Overview

Opcodes774

Unique Opcodes92

Jump Instructions21

Storage Operations9

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 {
    mapping (address => uint) public balances;
    event Transfer(address _from, address _to, uint256 _value);
    function MyToken(uint supply) {
        if (supply == 0) supply = 10000;
        balances[msg.sender] = supply;
    }
    function transfer(address _to, uint256 _value) returns (bool success) {
        if (balances[msg.sender] < _value) return false;
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        Transfer(msg.sender, _to, _value);
        return true;
    }
    function balanceof(address _owner) constant returns (uint256 balance) {
        return balances[_owner];
    }
}

External Links

Etherscan Verified Source (if any)

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