Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

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)  contract ERC20Basic    - function balanceOf(address who)    - function transfer(address to, uint256 ...  contract BasicToken is ERC20Basic    - function transfer(address _to, uint25 ...    - function balanceOf(address _owner)  contract ERC20 is ERC20Basic    - function allowance(address owner, add ...    - function transferFrom(address from, a ...    - function approve(address spender, uin ...  contract StandardToken is ERC20, B ...    - function transferFrom(address _from, ...    - function approve(address _spender, ui ...    - function allowance(address _owner, ad ...    - function increaseApproval (address _s ...    - function decreaseApproval (address _s ...  contract Ownable    - function Ownable()    - function transferOwnership(address ne ...  contract ELTCoin is StandardToken, ... *    - function makePresaleReady()    - function ELTCoin()

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2017-10-09
*/

pragma solidity ^0.4.15;

/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant returns (uint256) {
    // assert(b > 0); // Solidity automatically throws 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;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}

/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public constant returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances.
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @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(_to != address(0));

    // SafeMath.sub will throw if there is not enough balance.
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

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

}

/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) allowed;
  bool public isPreSaleReady = false;

  /**
   * @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(_to != address(0));

    uint256 _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = _allowance.sub(_value);
    Transfer(_from, _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(isPreSaleReady);
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @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 constant returns (uint256 remaining) {
    return allowed[_owner][_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
   */
  function increaseApproval (address _spender, uint _addedValue) returns (bool success) {
    require(isPreSaleReady);
    allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  function decreaseApproval (address _spender, uint _subtractedValue) returns (bool success) {
    require(isPreSaleReady);
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }
}

/**
 * @title Ownable
 * @dev The Ownable contract has an owner address, and provides basic authorization control
 * functions, this simplifies the implementation of "user permissions".
 */
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.
   */
  function Ownable() {
    owner = msg.sender;
  }

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

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

contract ELTCoin is StandardToken, Ownable {

  string public constant name = "ELTCOIN";
  string public constant symbol = "ELTCOIN";
  uint8 public constant decimals = 8;

  uint256 public constant INITIAL_SUPPLY = 100000000 * (10 ** uint256(decimals));

  event PreSaleReady();

  function makePresaleReady() onlyOwner public {
    require(!isPreSaleReady);

    PreSaleReady();

    isPreSaleReady = true;
  }

  /**
   * @dev Constructor that gives msg.sender all of existing tokens.
   */
  function ELTCoin() {
    totalSupply = INITIAL_SUPPLY;
    balances[msg.sender] = INITIAL_SUPPLY;
  }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"isPreSaleReady","outputs":[{"name":"","type":"bool"}],"payable":false,"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,"type":"function"},{"constant":true,"inputs":[],"name":"INITIAL_SUPPLY","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"makePresaleReady","outputs":[],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"type":"function"},{"inputs":[],"payable":false,"type":"constructor"},{"anonymous":false,"inputs":[],"name":"PreSaleReady","type":"event"},{"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":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","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"}]

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

bzzr://b164e92998d12641250687522c857f3182e9da2acdba036ca696adee9e5fa916