pragma solidity ^0.4.18;

/*Deverlopment by anteros.io*/

/*E-Mail:support@anteros.io*/

/*twitter.com/anteros_token*/

/**

* @title SafeMath

* @dev Math operations with safety checks that throw on error

*/

library SafeMath {

/**

* @dev Multiplies two numbers, throws on overflow.

*/

function mul(uint256 a, uint256 b) internal pure returns (uint256) {

if (a == 0) {

return 0;

}

uint256 c = a * b;

assert(c / a == b);

return c;

}

/**

* @dev Integer division of two numbers, truncating the quotient.

*/

function div(uint256 a, uint256 b) internal pure 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;

}

/**

* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).

*/

function sub(uint256 a, uint256 b) internal pure returns (uint256) {

assert(b <= a);

return a - b;

}

/**

* @dev Adds two numbers, throws on overflow.

*/

function add(uint256 a, uint256 b) internal pure 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 {

function totalSupply() public view returns (uint256);

function balanceOf(address who) public view returns (uint256);

function transfer(address to, uint256 value) public returns (bool);

event Transfer(address indexed from, address indexed to, uint256 value);

}

/**

* @title ERC20 interface

* @dev see https://github.com/ethereum/EIPs/issues/20

*/

contract ERC20 is ERC20Basic {

function allowance(address owner, address spender) public view 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);

}

/**

* @title Basic token

* @dev Basic version of StandardToken, with no allowances.

*/

contract BasicToken is ERC20Basic {

using SafeMath for uint256;

mapping(address => uint256) balances;

uint256 totalSupply_;

/**

* @dev total number of tokens in existence

*/

function totalSupply() public view returns (uint256) {

return totalSupply_;

}

/**

* @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));

require(_value <= balances[msg.sender]);

// 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 view returns (uint256 balance) {

return balances[_owner];

}

}

/**

* @title Standard ERC20 token

*

* @dev Implementation of the basic standard token.

* @dev https://github.com/ethereum/EIPs/issues/20

* @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol

*/

contract StandardToken is ERC20, BasicToken {

mapping (address => mapping (address => uint256)) internal allowed;

/**

* @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));

require(_value <= balances[_from]);

require(_value <= allowed[_from][msg.sender]);

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;

}

/**

* @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) {

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 view returns (uint256) {

return allowed[_owner][_spender];

}

/**

* @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 increaseApproval(address _spender, uint _addedValue) public returns (bool) {

allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);

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 decreaseApproval(address _spender, uint _subtractedValue) public returns (bool) {

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 AnterosToken

* @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

* `StandardToken` functions.

*/

contract AnterosToken is StandardToken {

string public constant name = "AnterosToken";

string public constant symbol = "AOS";

uint8 public constant decimals = 0;

uint256 public constant INITIAL_SUPPLY = 30000000 * 1 wei;

/**

* @dev Constructor that gives msg.sender all of existing tokens.

*/

function AnterosToken() public {

totalSupply_ = INITIAL_SUPPLY;

balances[msg.sender] = INITIAL_SUPPLY;

Transfer(0x0, msg.sender, INITIAL_SUPPLY);

}

}