Friendz Coin

0x23352036e911a22cfc692b5e2e196692658aded9

transferOwnership keyboard_arrow_up

  function transferOwnership(address newOwner) onlyOwner public {
    require(newOwner != address(0));
    require(newOwner != owner);

    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

balanceOf keyboard_arrow_up

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

transfer keyboard_arrow_up

  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value > 0);

    // 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;
  }

burn keyboard_arrow_up

	function burn(uint256 _value) public {
		balances[msg.sender] = balances[msg.sender].sub(_value);
		totalSupply = totalSupply.sub(_value);

		Burn(msg.sender, _value);
	}

canTransferBefore keyboard_arrow_up

	function canTransferBefore(address _sender) public view returns(bool) {
		return (
			_sender == owner ||
			_sender == presale_holder ||
			_sender == ico_holder ||
			_sender == reserved_holder ||
			_sender == wallet_holder
		);
	}

canTransferIfLocked keyboard_arrow_up

	function canTransferIfLocked(address _sender, uint256 _value) public view returns(bool) {
		uint256 after_math = balances[_sender].sub(_value);
		return (
			now >= RELEASE_DATE &&
		    after_math >= getMinimumAmount(_sender)
        );
	}

setCoOwner keyboard_arrow_up

	function setCoOwner(address _addr) onlyOwner public {
		require(_addr != co_owner);

		co_owner = _addr;

		CoOwnerSet(_addr);
	}

setReleaseDate keyboard_arrow_up

	function setReleaseDate(uint256 _date) onlyOwner public {
		require(_date > 0);
		require(_date != RELEASE_DATE);

		RELEASE_DATE = _date;

		ReleaseDateChanged(msg.sender, _date);
	}

getMinimumAmount keyboard_arrow_up

	function getMinimumAmount(address _addr) constant public returns (uint256) {
		// if the address ha no limitations just return 0
		if(blocked_amounts[_addr] == 0x0)
			return 0x0;

		// if the purchase date is in the future block all the tokens
		if(purchase_dates[_addr] > now){
			return blocked_amounts[_addr];
		}

		uint256 alpha = uint256(now).sub(purchase_dates[_addr]); // absolute purchase date
		uint256 beta = release_dates[_addr].sub(purchase_dates[_addr]); // absolute token release date
		uint256 tokens = blocked_amounts[_addr].sub(alpha.mul(blocked_amounts[_addr]).div(beta)); // T - (α * T) / β

		return tokens;
	}

setBlockingState keyboard_arrow_up

	function setBlockingState(address _addr, uint256 _end, uint256 _value) isBlockingTransfer public {
		// only the onwer and the co-owner can call this function
		require(
			msg.sender == owner ||
			msg.sender == co_owner
		);
		require(_addr != address(0));

		uint256 final_value = _value;

		if(release_dates[_addr] != 0x0){
			// if it's not the first time this function is beign called for this address
			// update its information instead of setting them (add value to previous value)
			final_value = blocked_amounts[_addr].add(_value);
		}

		release_dates[_addr] = _end;
		purchase_dates[_addr] = RELEASE_DATE;
		blocked_amounts[_addr] = final_value;

		UpdatedBlockingState(_addr, _end, RELEASE_DATE, final_value);
	}

freeToken keyboard_arrow_up

	function freeToken() public onlyOwner {
		free_transfer = true;
	}

transfer keyboard_arrow_up

	function transfer(address _to, uint _value) canTransfer(msg.sender, _value) public returns (bool success) {
		return super.transfer(_to, _value);
	}

transferFrom keyboard_arrow_up

	function transferFrom(address _from, address _to, uint _value) canTransfer(_from, _value) public returns (bool success) {
		require(_from != address(0));
		require(_to != address(0));

	    // SafeMath.sub will throw if there is not enough balance.
	    balances[_from] = balances[_from].sub(_value);
	    balances[_to] = balances[_to].add(_value);
		allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value); // this will throw if we don't have enough allowance

	    // this event comes from BasicToken.sol
	    Transfer(_from, _to, _value);

	    return true;
	}

approve keyboard_arrow_up

  	function approve(address _spender, uint256 _value) public returns (bool) {
	 	require(_value == 0 || allowed[msg.sender][_spender] == 0);

	 	allowed[msg.sender][_spender] = _value;
	 	Approval(msg.sender, _spender, _value);

	 	return true;
  	}

allowance keyboard_arrow_up

	function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
    	return allowed[_owner][_spender];
  	}

increaseApproval keyboard_arrow_up

	function increaseApproval (address _spender, uint256 _addedValue) public returns (bool success) {
		allowed[msg.sender][_spender] = allowed[msg.sender][_spender].add(_addedValue);
		Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
		return true;
	}

decreaseApproval keyboard_arrow_up

	function decreaseApproval (address _spender, uint256 _subtractedValue) public returns (bool success) {
		uint256 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;
	}