pragma solidity ^0.4.18;
interface IERC20 {
 function totalSupply() constant returns (uint256 totalSupply);
 function balanceOf(address _owner) constant returns (uint256 balance);
 function transfer(address _to, uint256 _value) returns (bool success);
 function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
 function approve(address _spender, uint256 _value) returns (bool success);
 function allowance(address _owner, address _spender) constant returns (uint256 remaining);
 event Transfer(address indexed _from, address indexed _to, uint256 _value);
 event Approval(address indexed _owner, address indexed _spender, uint256 _value);
 }

library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    if (a == 0) {
      return 0;
    }
    uint256 c = a * b;
    assert(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;
  }
}

contract Electra is IERC20 {
    
    using SafeMath for uint256;
    
    uint public  _totalSupply=0;
    
      string public constant symbol="ECT";
    string public constant name="ElectraToken";
    uint8 public constant decimals=18;
    uint256 public constant RATE=500;
 
    address public owner;
    mapping(address => uint256) balances;
    mapping(address => mapping(address => uint256)) allowed;
    
  
    
    function() payable{
        createTokens();
    }
    
    function SucToken()
    {
       owner=msg.sender;
    }
    
    function createTokens() payable
    {
        require(msg.value>0);
        
        uint256 tokens=msg.value.mul(RATE);
        
        balances[msg.sender]=balances[msg.sender].add(tokens);
        
        _totalSupply=_totalSupply.add(tokens);
        
        owner.transfer(msg.value);
    }
    
    function totalSupply() constant returns (uint256 totalSupply){
        
        return _totalSupply;
    }
 function balanceOf(address _owner) constant returns (uint256 balance){
      return balances[_owner];
 }
 function transfer(address _to, uint256 _value) returns (bool success){
     require(
         balances[msg.sender] >= _value
         && _value > 0
         );
          balances[msg.sender]=balances[msg.sender].sub(_value);
           balances[_to]=balances[_to].add(_value);
          Transfer(msg.sender,_to,_value);
          return true;
 }
 function transferFrom(address _from, address _to, uint256 _value) returns (bool success)
 {
     require(
         allowed[_from][msg.sender] >= _value
         &&  balances[_from]>=_value
         &&  _value > 0
         );
          balances[_from]= balances[_from].sub(_value);
           balances[_to]=balances[_to].add(_value);
         allowed[_from][msg.sender] = allowed[_from][msg.sender].sub( _value);
        Transfer(_from,_to,_value);
          return true;
 }
 function approve(address _spender, uint256 _value) returns (bool success)
 {
      allowed[msg.sender][_spender] = _value;
      Approval(msg.sender,_spender,_value);
      return true;
 }
 function allowance(address _owner, address _spender) constant returns (uint256 remaining){
     return allowed[_owner][_spender];
 }
 event Transfer(address indexed _from, address indexed _to, uint256 _value);
 event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}