Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

 contract DCCToken *    - function DCCToken()    - function addAdmin (address admin)    - function removeAdmin (address admin)    - function totalSupply()    - function balanceOf(address owner)    - function recovery(address from, addre ...    - function approve(address spender, uin ...    - function transferFrom(address from, a ...    - function allowance(address owner, add ...    - function create(address to, uint256 a ...    - function destroy(address from, uint25 ...    - function transfer(address to, uint256 ...    - function freeze ()    - function unfreeze ()    - function ()

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-07-18
*/

pragma solidity ^0.4.8;

//Kings Distributed Systems
//ERC20 Compliant DCC Token
contract DCCToken {
    string public constant name     = "Distributed Compute Credits";
    string public constant symbol   = "DCC";
    uint8  public constant decimals = 18;

    uint256 public totalSupply      = 0;
    
    bool    public frozen           = false;
    
    mapping(address => mapping (address => uint256)) allowed;
    mapping(address => uint256) balances;
    
    mapping(address => bool) admins;
    address public owner;
    modifier onlyOwner() {
        if (msg.sender != owner) {
            throw;
        }
        _;
    }
    
    modifier onlyAdmin() {
        if (!admins[msg.sender]) {
            throw;
        }
        _;
    }
 
    event Transfer(address indexed from,  address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    
    // Constructor
    function DCCToken() {
        owner = msg.sender;
        admins[msg.sender] = true;
    }
    
    function addAdmin (address admin) onlyOwner {
        admins[admin] = true;
    }
    
    function removeAdmin (address admin) onlyOwner {
        admins[admin] = false;
    }
    
    function totalSupply() external constant returns (uint256) {
        return totalSupply;
    }
    
    function balanceOf(address owner) external constant returns (uint256) {
        return balances[owner];
    }
    
    // Open support ticket to prove transfer mistake to unusable address.
    // Not to be used to dispute transfers. Only for trapped tokens.
    function recovery(address from, address to, uint256 amount) onlyAdmin external {
        assert(balances[from] >= amount);
        assert(amount > 0);
    
        balances[from] -= amount;
        balances[to] += amount;
        Transfer(from, this, amount);
        Transfer(this, to, amount);
    }
 
    function approve(address spender, uint256 amount) external returns (bool){
        allowed[msg.sender][spender] = amount;
        Approval(msg.sender, spender, amount);
        
        return true;
    }
    
    function transferFrom(address from, address to, uint256 amount) external returns (bool) {
        if(frozen
        || amount == 0
        || amount > allowed[from][msg.sender]
        || amount > balances[from]
        || amount + balances[to] < balances[to]){
            return false;
        }
        
        balances[from] -= amount;
        balances[to] += amount;
        allowed[from][msg.sender] -= amount;
        Transfer(from, to, amount);
        
        return true;
    }
 
    function allowance(address owner, address spender) external constant returns (uint256) {
        return allowed[owner][spender];
    }
 
    function create(address to, uint256 amount) onlyAdmin external returns (bool) {
        if (amount == 0
        || balances[to] + amount < balances[to]){
            return false;
        }
        
        totalSupply += amount;
        balances[to] += amount;
        Transfer(this, to, amount);
        
        return true;
    }
    
    function destroy(address from, uint256 amount) onlyAdmin external returns (bool) {
        if(amount == 0
        || balances[from] < amount){
            return false;
        }
        
        balances[from] -= amount;
        totalSupply -= amount;
        Transfer(from, this, amount);
        
        return true;
    }
 
    function transfer(address to, uint256 amount) external returns (bool) {
        if (frozen
        || amount == 0
        || balances[msg.sender] < amount
        || balances[to] + amount < balances[to]){
            return false;
        }
    
        balances[msg.sender] -= amount;
        balances[to] += amount;
        Transfer(msg.sender, to, amount);
        
        return true;
    }
    
    function freeze () onlyAdmin external {
        frozen = true;
    }
    
    function unfreeze () onlyAdmin external {
        frozen = false;
    }
    
    // Do not transfer ether to this contract.
    function () payable {
        throw;
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"frozen","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"spender","type":"address"},{"name":"amount","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"recovery","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"create","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"admin","type":"address"}],"name":"removeAdmin","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"freeze","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"unfreeze","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"admin","type":"address"}],"name":"addAdmin","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"amount","type":"uint256"}],"name":"destroy","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"},{"name":"spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"}]

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

bzzr://6227584bb1fac0bbc500bb670bcd58d7ae94a880f26cd9ac5b256cb8e78cb53e