contract ERC20Interface {
	uint256 public totalSupply;
	function balanceOf(address _owner) public constant returns (uint balance); // Get the account balance of another account with address _owner
	function transfer(address _to, uint256 _value) public returns (bool success); // Send _value amount of tokens to address _to
	function transferFrom(address _from, address _to, uint256 _value) public returns (bool success); // Send _value amount of tokens from address _from to address _to
	function approve(address _spender, uint256 _value) public returns (bool success);
	function allowance(address _owner, address _spender) public constant returns (uint256 remaining); // Returns the amount which _spender is still allowed to withdraw from _owner
	event Transfer(address indexed _from, address indexed _to, uint256 _value); // Triggered when tokens are transferred.
	event Approval(address indexed _owner, address indexed _spender, uint256 _value); // Triggered whenever approve(address _spender, uint256 _value) is called.
}
function approve(address _spender, uint256 _value) public returns (bool success);
// Send _value amount of tokens from address _from to address _to