Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2019-01-11
*/

pragma solidity ^0.5.2;

contract Ownable {
    
    address public _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev The Ownable constructor sets the original `owner` of the contract to the sender
     * account.
     */
    constructor () internal {
        _owner = 0x202Abc6cF98863ee0126C182CA325a33A867ACbA;
        emit OwnershipTransferred(address(0), _owner);
    }

    /**
     * @return the address of the owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(msg.sender == _owner);
        _;
    }

    /**
     * @dev Transfers control of the contract to a newOwner.
     * @param newOwner The address to transfer ownership to.
     */
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0));
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}





/**
 * @title SafeMath
 * @dev Math operations with safety checks that revert on error
 */
library SafeMath {

  /**
  * @dev Multiplies two numbers, reverts on overflow.
  */
  function mul(uint256 _a, uint256 _b) internal pure returns (uint256) {
    // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (_a == 0) {
      return 0;
    }

    uint256 c = _a * _b;
    require(c / _a == _b);

    return c;
  }

  /**
  * @dev Integer division of two numbers truncating the quotient, reverts on division by zero.
  */
  function div(uint256 _a, uint256 _b) internal pure returns (uint256) {
    require(_b > 0); // Solidity only automatically asserts when dividing by 0
    uint256 c = _a / _b;
    // assert(_a == _b * c + _a % _b); // There is no case in which this doesn't hold

    return c;
  }

  /**
  * @dev Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 _a, uint256 _b) internal pure returns (uint256) {
    require(_b <= _a);
    uint256 c = _a - _b;

    return c;
  }

  /**
  * @dev Adds two numbers, reverts on overflow.
  */
  function add(uint256 _a, uint256 _b) internal pure returns (uint256) {
    uint256 c = _a + _b;
    require(c >= _a);

    return c;
  }

  /**
  * @dev Divides two numbers and returns the remainder (unsigned integer modulo),
  * reverts when dividing by zero.
  */
  function mod(uint256 a, uint256 b) internal pure returns (uint256) {
    require(b != 0);
    return a % b;
  }
}





contract ERC20_Interface {
    function totalSupply() external view returns (uint256);
    function balanceOf(address who) external view returns (uint256);
    function allowance(address owner, address spender) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
    function approve(address spender, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);   
}




contract RC20 is ERC20_Interface, Ownable {
    
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowed;

    uint256 private _totalSupply;
    uint8 private _decimals;
    string private _name;
    string private _symbol;
    
    constructor() public {
        _totalSupply = 900000000e18; 
        _decimals = 18;
        _name = "RoboCalls";
        _symbol = "RC20";
        _balances[_owner] = _totalSupply;
        emit Transfer(address(this), _owner, _totalSupply);
    }


    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }
    
    

    function decimals() public view returns(uint8) {
        return _decimals;
    }
    

    function name() public view returns(string memory) {
        return _name;
    }
    
    
    function symbol() public view returns(string memory) {
        return _symbol;
    }

    /**
    * @dev Gets the balance of the specified address.
    * @param owner The address to query the balance of.
    * @return An uint256 representing the amount owned by the passed address.
    */
    function balanceOf(address owner) public view returns (uint256) {
        return _balances[owner];
    }

    /**
     * @dev Function to check the amount of tokens that an owner allowed to a spender.
     * @param owner address The address which owns the funds.
     * @param spender address The address which will spend the funds.
     * @return A uint256 specifying the amount of tokens still available for the spender.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowed[owner][spender];
    }

    /**
    * @dev Transfer token for a specified address
    * @param to The address to transfer to.
    * @param value The amount to be transferred.
    */
    function transfer(address to, uint256 value) public returns (bool) {
        _transfer(msg.sender, to, value);
        return true;
    }

    /**
     * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
     * Beware that changing an allowance with this method brings the risk that someone may use both the old
     * and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this
     * race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     * @param spender The address which will spend the funds.
     * @param value The amount of tokens to be spent.
     */
    function approve(address spender, uint256 value) public returns (bool) {
        require(spender != address(0));
        _allowed[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    /**
     * @dev Transfer tokens from one address to another.
     * Note that while this function emits an Approval event, this is not required as per the specification,
     * and other compliant implementations may not emit the event.
     * @param from address The address which you want to send tokens from
     * @param to address The address which you want to transfer to
     * @param value uint256 the amount of tokens to be transferred
     */
    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
        _transfer(from, to, value);
        emit Approval(from, msg.sender, _allowed[from][msg.sender]);
        return true;
    }

    /**
     * @dev Increase the amount of tokens that an owner allowed to a spender.
     * approve should be called when allowed_[_spender] == 0. To increment
     * allowed value is better to use this function to avoid 2 calls (and wait until
     * the first transaction is mined)
     * From MonolithDAO Token.sol
     * Emits an Approval event.
     * @param spender The address which will spend the funds.
     * @param addedValue The amount of tokens to increase the allowance by.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        require(spender != address(0));

        _allowed[msg.sender][spender] = _allowed[msg.sender][spender].add(addedValue);
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }

    /**
     * @dev Decrease the amount of tokens that an owner allowed to a spender.
     * approve should be called when allowed_[_spender] == 0. To decrement
     * allowed value is better to use this function to avoid 2 calls (and wait until
     * the first transaction is mined)
     * From MonolithDAO Token.sol
     * Emits an Approval event.
     * @param spender The address which will spend the funds.
     * @param subtractedValue The amount of tokens to decrease the allowance by.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        require(spender != address(0));
        _allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
        emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
        return true;
    }


    /**
    * @dev Transfer token for a specified addresses
    * @param from The address to transfer from.
    * @param to The address to transfer to.
    * @param value The amount to be transferred.
    */
    function _transfer(address from, address to, uint256 value) internal {
        require(to != address(0));
        _balances[from] = _balances[from].sub(value);
        _balances[to] = _balances[to].add(value);
        emit Transfer(from, to, value);
    }


    /**
     * @dev Internal function that burns an amount of the token from the owner 
     * @param value The amount that will be burnt.
     */
    function burn(uint256 value) public onlyOwner {
        _totalSupply = _totalSupply.sub(value);
        _balances[msg.sender] = _balances[msg.sender].sub(value);
        emit Transfer(msg.sender, address(0), value);
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"spender","type":"address"},{"name":"value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"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":"value","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":"spender","type":"address"},{"name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"value","type":"uint256"}],"name":"burn","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":"spender","type":"address"},{"name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"_owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","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"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"previousOwner","type":"address"},{"indexed":true,"name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"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://352c5a31c728798cddde22be2e69caaa00f7630ee115a1b9c508bed95329d75f