contract PushToken is ERC20Interface {
    string public constant symbol = "PSH";
    string public constant name = "EtherPush";
    uint8 public constant  decimals = 18;
    uint256 _totalSupply = 100000000000000000000000000;

    // Owner of this contract
    address public owner;

    // Balances for each account
    mapping(address => uint256) balances;

    // Owner of account approves the transfer of an amount to another account
    mapping(address => mapping (address => uint256)) allowed;

    // Functions with this modifier can only be executed by the owner
    modifier onlyOwner() {
        if (msg.sender != owner) {
            revert();
        }
        _;
    }

    // Constructor
    function PushToken() {
        owner = msg.sender;
        balances[owner] = _totalSupply;
    }

    function totalSupply() constant returns (uint256 total) {
        return _totalSupply;
    }

    // What is the balance of a particular account?
    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances[_owner];
    }

    // Transfer the balance from owner's account to another account
    function transfer(address _to, uint256 _amount) returns (bool success) {
        if (balances[msg.sender] >= _amount
            && _amount > 0
            && balances[_to] + _amount > balances[_to]) {
            balances[msg.sender] -= _amount;
            balances[_to] += _amount;
            Transfer(msg.sender, _to, _amount);
            return true;
        } else {
            return false;
        }
    }

    // Send _value amount of tokens from address _from to address _to
    // The transferFrom method is used for a withdraw workflow, allowing contracts to send
    // tokens on your behalf, for example to "deposit" to a contract address and/or to charge
    // fees in sub-currencies; the command should fail unless the _from account has
    // deliberately authorized the sender of the message via some mechanism; we propose
    // these standardized APIs for approval:
    function transferFrom(
        address _from,
        address _to,
        uint256 _amount
   ) returns (bool success) {
       if (balances[_from] >= _amount
           && allowed[_from][msg.sender] >= _amount
           && _amount > 0
           && balances[_to] + _amount > balances[_to]) {
           balances[_from] -= _amount;
           allowed[_from][msg.sender] -= _amount;
           balances[_to] += _amount;
           Transfer(_from, _to, _amount);
           return true;
       } else {
           return false;
       }
   }

   // Allow _spender to withdraw from your account, multiple times, up to the _value amount.
   // If this function is called again it overwrites the current allowance with _value.
   function approve(address _spender, uint256 _amount) returns (bool success) {
       allowed[msg.sender][_spender] = _amount;
       Approval(msg.sender, _spender, _amount);
       return true;
   }

   function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
       return allowed[_owner][_spender];
   }
}
function transferFrom(
    address _from,
    address _to,
    uint256 _amount
 returns (bool success) {
   if (balances[_from] >= _amount
       && allowed[_from][msg.sender] >= _amount
       && _amount > 0
       && balances[_to] + _amount > balances[_to]) {
       balances[_from] -= _amount;
       allowed[_from][msg.sender] -= _amount;
       balances[_to] += _amount;
       Transfer(_from, _to, _amount);
       return true;
   } else {
       return false;
   }


// Send _value amount of tokens from address _from to address _to
// The transferFrom method is used for a withdraw workflow, allowing contracts to send
// tokens on your behalf, for example to "deposit" to a contract address and/or to charge
// fees in sub-currencies; the command should fail unless the _from account has
// deliberately authorized the sender of the message via some mechanism; we propose
// these standardized APIs for approval: