Token

Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

interface IERC20    - function totalSupply()    - function balanceOf(address who)    - function allowance(address owner, add ...    - function transfer(address to, uint256 ...    - function approve(address spender, uin ...    - function transferFrom(address from, a ... library SafeMath    - function mul(uint256 a, uint256 b)    - function div(uint256 a, uint256 b)    - function sub(uint256 a, uint256 b)    - function add(uint256 a, uint256 b)    - function mod(uint256 a, uint256 b)  contract ERC20 is IERC20    - function totalSupply()    - function balanceOf(address owner)    - function allowance(    - function transfer(address to, uint256 ...    - function approve(address spender, uin ...    - function transferFrom(    - function increaseAllowance(    - function decreaseAllowance(    - function _mint(address account, uint2 ...    - function _burn(address account, uint2 ...    - function _burnFrom(address account, u ...  contract EONToken is ERC20 *

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2018-09-25
*/

pragma solidity ^0.4.24;

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
interface IERC20 {
  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
  );
}

/**
 * @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;
  }
}

/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
 * Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract ERC20 is IERC20 {
  using SafeMath for uint256;

  mapping (address => uint256) private _balances;

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

  uint256 private _totalSupply;

  /**
  * @dev Total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return _totalSupply;
  }

  /**
  * @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) {
    require(value <= _balances[msg.sender]);
    require(to != address(0));

    _balances[msg.sender] = _balances[msg.sender].sub(value);
    _balances[to] = _balances[to].add(value);
    emit 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
   * @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)
  {
    require(value <= _balances[from]);
    require(value <= _allowed[from][msg.sender]);
    require(to != address(0));

    _balances[from] = _balances[from].sub(value);
    _balances[to] = _balances[to].add(value);
    _allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
    emit Transfer(from, to, value);
    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
   * @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
   * @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 Internal function that mints an amount of the token and assigns it to
   * an account. This encapsulates the modification of balances such that the
   * proper events are emitted.
   * @param account The account that will receive the created tokens.
   * @param amount The amount that will be created.
   */
  function _mint(address account, uint256 amount) internal {
    require(account != 0);
    _totalSupply = _totalSupply.add(amount);
    _balances[account] = _balances[account].add(amount);
    emit Transfer(address(0), account, amount);
  }

  /**
   * @dev Internal function that burns an amount of the token of a given
   * account.
   * @param account The account whose tokens will be burnt.
   * @param amount The amount that will be burnt.
   */
  function _burn(address account, uint256 amount) internal {
    require(account != 0);
    require(amount <= _balances[account]);

    _totalSupply = _totalSupply.sub(amount);
    _balances[account] = _balances[account].sub(amount);
    emit Transfer(account, address(0), amount);
  }

  /**
   * @dev Internal function that burns an amount of the token of a given
   * account, deducting from the sender's allowance for said account. Uses the
   * internal burn function.
   * @param account The account whose tokens will be burnt.
   * @param amount The amount that will be burnt.
   */
  function _burnFrom(address account, uint256 amount) internal {
    require(amount <= _allowed[account][msg.sender]);

    // Should https://github.com/OpenZeppelin/zeppelin-solidity/issues/707 be accepted,
    // this function needs to emit an event with the updated approval.
    _allowed[account][msg.sender] = _allowed[account][msg.sender].sub(
      amount);
    _burn(account, amount);
  }
}

/**
 * @title SimpleToken
 * @dev Very simple ERC20 Token example, where all tokens are pre-assigned to the creator.
 * Note they can later distribute these tokens as they wish using `transfer` and other
 * `ERC20` functions.
 */
contract EONToken is ERC20 {

  string public constant name = "EON Token";
  string public constant symbol = "EON";
  uint8 public constant decimals = 4;

  uint256 public constant INITIAL_SUPPLY = 500000000 * (10 ** uint256(decimals));

  /**
   * @dev Constructor that gives msg.sender all of existing tokens.
   */
  constructor() public {
    _mint(msg.sender, INITIAL_SUPPLY);
  }

}

• 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":"INITIAL_SUPPLY","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","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":true,"inputs":[{"name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"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","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"},{"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://79cb04b2c2fd0bd667d103516633c1e11b5d4c9fa02b5d29a0a3e9826fc3cfea