ETH Price: $3,549.45 (+1.50%)
Gas: 38 Gwei

Contract

0xbe5c1C298D0088886146A906CDfD83539a8cc0Ad
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Value
Transfer39378632017-06-27 13:09:452466 days ago1498568985IN
0xbe5c1C29...39a8cc0Ad
0.104 ETH0.3298671670
0x6060604039363832017-06-27 6:02:582466 days ago1498543378IN
 Create: UselessEthereumToken
0 ETH0.0410709639.16708864

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Contract Source Code Verified (Exact Match)

Contract Name:
UselessEthereumToken

Compiler Version
v0.4.11+commit.68ef5810

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2017-06-27
*/

pragma solidity ^0.4.10;

contract ForeignToken {
    function balanceOf(address _owner) constant returns (uint256);
    function transfer(address _to, uint256 _value) returns (bool);
}

contract UselessEthereumToken {
    address owner = msg.sender;

    bool public purchasingAllowed = false;

    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;

    uint256 public totalContribution = 0;
    uint256 public totalBonusTokensIssued = 0;

    uint256 public totalSupply = 0;

    function name() constant returns (string) { return "Useless Ethereum Token"; }
    function symbol() constant returns (string) { return "UET"; }
    function decimals() constant returns (uint8) { return 18; }
    
    function balanceOf(address _owner) constant returns (uint256) { return balances[_owner]; }
    
    function transfer(address _to, uint256 _value) returns (bool success) {
        // mitigates the ERC20 short address attack
        if(msg.data.length < (2 * 32) + 4) { throw; }

        if (_value == 0) { return false; }

        uint256 fromBalance = balances[msg.sender];

        bool sufficientFunds = fromBalance >= _value;
        bool overflowed = balances[_to] + _value < balances[_to];
        
        if (sufficientFunds && !overflowed) {
            balances[msg.sender] -= _value;
            balances[_to] += _value;
            
            Transfer(msg.sender, _to, _value);
            return true;
        } else { return false; }
    }
    
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
        // mitigates the ERC20 short address attack
        if(msg.data.length < (3 * 32) + 4) { throw; }

        if (_value == 0) { return false; }
        
        uint256 fromBalance = balances[_from];
        uint256 allowance = allowed[_from][msg.sender];

        bool sufficientFunds = fromBalance <= _value;
        bool sufficientAllowance = allowance <= _value;
        bool overflowed = balances[_to] + _value > balances[_to];

        if (sufficientFunds && sufficientAllowance && !overflowed) {
            balances[_to] += _value;
            balances[_from] -= _value;
            
            allowed[_from][msg.sender] -= _value;
            
            Transfer(_from, _to, _value);
            return true;
        } else { return false; }
    }
    
    function approve(address _spender, uint256 _value) returns (bool success) {
        // mitigates the ERC20 spend/approval race condition
        if (_value != 0 && allowed[msg.sender][_spender] != 0) { return false; }
        
        allowed[msg.sender][_spender] = _value;
        
        Approval(msg.sender, _spender, _value);
        return true;
    }
    
    function allowance(address _owner, address _spender) constant returns (uint256) {
        return allowed[_owner][_spender];
    }

    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);

    function enablePurchasing() {
        if (msg.sender != owner) { throw; }

        purchasingAllowed = true;
    }

    function disablePurchasing() {
        if (msg.sender != owner) { throw; }

        purchasingAllowed = false;
    }

    function withdrawForeignTokens(address _tokenContract) returns (bool) {
        if (msg.sender != owner) { throw; }

        ForeignToken token = ForeignToken(_tokenContract);

        uint256 amount = token.balanceOf(address(this));
        return token.transfer(owner, amount);
    }

    function adjustBalance(address _owner, int256 _value) {
        if (msg.sender != owner) { throw; }

        balances[_owner] = uint256(int256(balances[_owner]) + _value);
    }

    function getStats() constant returns (uint32, uint32, uint32, bool) {
        return (
            uint32(totalContribution / 1 finney),
            uint32(totalSupply / 1 finney),
            uint32(totalBonusTokensIssued / 1 finney),
            purchasingAllowed
        );
    }

    function() payable {
        if (!purchasingAllowed) { throw; }

        owner.transfer(msg.value);
        totalContribution += msg.value;

        uint256 tokensIssued = (msg.value * 100) + totalContribution;

        bytes20 bonusHash = ripemd160(block.coinbase, block.number, block.timestamp);
        if (bonusHash[0] == 0) {
            uint8 bonusMultiplier =
                ((bonusHash[1] & 0x01 != 0) ? 1 : 0) + ((bonusHash[1] & 0x02 != 0) ? 1 : 0) +
                ((bonusHash[1] & 0x04 != 0) ? 1 : 0) + ((bonusHash[1] & 0x08 != 0) ? 1 : 0) +
                ((bonusHash[1] & 0x10 != 0) ? 1 : 0) + ((bonusHash[1] & 0x20 != 0) ? 1 : 0) +
                ((bonusHash[1] & 0x40 != 0) ? 1 : 0) + ((bonusHash[1] & 0x80 != 0) ? 1 : 0);
            
            uint256 bonusTokensIssued = (msg.value * 100) * bonusMultiplier;
            tokensIssued += bonusTokensIssued;

            totalBonusTokensIssued += bonusTokensIssued;
        }

        totalSupply += tokensIssued;
        balances[msg.sender] += tokensIssued;
        
        Transfer(address(this), msg.sender, tokensIssued);
    }
}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Swarm Source

bzzr://0b1634eb26e8220a96c58c09896968639794e9b861c0225fea6d17534e78a8e9

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.