// Vulnerability label: locked
pragma solidity ^0.4.4;

	contract Token {

		/// @return total amount of tokens
		function totalSupply() constant returns (uint256 supply) {}

		/// @param _owner The address from which the balance will be retrieved
		/// @return The balance
		function balanceOf(address _owner) constant returns (uint256 balance) {}

		/// @notice send `_value` token to `_to` from `msg.sender`
		/// @param _to The address of the recipient
		/// @param _value The amount of token to be transferred
		/// @return Whether the transfer was successful or not
		function transfer(address _to, uint256 _value) returns (bool success) {}

		/// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
		/// @param _from The address of the sender
		/// @param _to The address of the recipient
		/// @param _value The amount of token to be transferred
		/// @return Whether the transfer was successful or not
		function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}

		/// @notice `msg.sender` approves `_addr` to spend `_value` tokens
		/// @param _spender The address of the account able to transfer the tokens
		/// @param _value The amount of wei to be approved for transfer
		/// @return Whether the approval was successful or not
		function approve(address _spender, uint256 _value) returns (bool success) {}

		/// @param _owner The address of the account owning tokens
		/// @param _spender The address of the account able to transfer the tokens
		/// @return Amount of remaining tokens allowed to spent
		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);

	}

	contract StandardToken is Token {

		function transfer(address _to, uint256 _value) returns (bool success) {
			//Default assumes totalSupply can't be over max (2^256 - 1).
			//If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.
			//Replace the if with this one instead.
			//if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
			if (balances[msg.sender] >= _value && _value > 0) {
				balances[msg.sender] -= _value;
				balances[_to] += _value;
				Transfer(msg.sender, _to, _value);
				return true;
			} else { return false; }
		}

		function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
			//same as above. Replace this line with the following if you want to protect against wrapping uints.
			//if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {
			if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
				balances[_to] += _value;
				balances[_from] -= _value;
				allowed[_from][msg.sender] -= _value;
				Transfer(_from, _to, _value);
				return true;
			} else { return false; }
		}

		function balanceOf(address _owner) constant returns (uint256 balance) {
			return balances[_owner];
		}

		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];
		}

		mapping (address => uint256) balances;
		mapping (address => mapping (address => uint256)) allowed;
		uint256 public totalSupply;
	}

	contract MoonDollars is StandardToken { // CHANGE THIS. Update the contract name.

		/* Public variables of the token */

		/*
		NOTE:
		The following variables are OPTIONAL vanities. One does not have to include them.
		They allow one to customise the token contract & in no way influences the core functionality.
		Some wallets/interfaces might not even bother to look at this information.
		*/
		string public name;                   // Token Name
		uint8 public decimals;                // How many decimals to show. To be standard complicant keep it 18
		string public symbol;                 // An identifier: eg SBX, XPR etc..
		string public version = 'H1.0'; 
		uint256 public unitsOneEthCanBuy;     // How many units of your coin can be bought by 1 ETH?
		uint256 public totalEthInWei;         // WEI is the smallest unit of ETH (the equivalent of cent in USD or satoshi in BTC). We'll store the total ETH raised via our ICO here.  
		address public fundsWallet;           // Where should the raised ETH go?

		// This is a constructor function 
		// which means the following function name has to match the contract name declared above
		function MoonDollars() {
			balances[msg.sender] = 1000000000000000000000000000;               // Give the creator all initial tokens. This is set to 1000 for example. If you want your initial tokens to be X and your decimal is 5, set this value to X * 100000. (CHANGE THIS)
			totalSupply = 1000000000000000000000000000;                        // Update total supply (1000 for example) (CHANGE THIS)
			name = "Moon Dollars";                                   // Set the name for display purposes (CHANGE THIS)
			decimals = 18;                                               // Amount of decimals for display purposes (CHANGE THIS)
			symbol = "M$";                                             // Set the symbol for display purposes (CHANGE THIS)
			unitsOneEthCanBuy = 50000;                                      // Set the price of your token for the ICO (CHANGE THIS)
			fundsWallet = msg.sender;                                    // The owner of the contract gets ETH
		}

		function() payable{
			totalEthInWei = totalEthInWei + msg.value;
			uint256 amount = msg.value * unitsOneEthCanBuy;
			if (balances[fundsWallet] < amount) {
				return;
			}

			balances[fundsWallet] = balances[fundsWallet] - amount;
			balances[msg.sender] = balances[msg.sender] + amount;

			Transfer(fundsWallet, msg.sender, amount); // Broadcast a message to the blockchain

			//Transfer ether to fundsWallet
			fundsWallet.transfer(msg.value);                               
		}

		/* Approves and then calls the receiving contract */
		function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {
			allowed[msg.sender][_spender] = _value;
			Approval(msg.sender, _spender, _value);

			//call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.
			//receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)
			//it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.
			if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { throw; }
			return true;
		}
	}