Writing a Function Read the Target Number#

Now that we have a function that allows users to play the Money Game, let's create a function that actually allows the owner of the MoneyGame to read the targetNumber. This function will be created to introduce the notion of creating function modifiers and applying them to the functions that we create.

Modifiers#

A function modifier creates additional features (or alternatively restrictions) on a function. To declare a modifier, after you write your modifier, add a _; to the function Source.

Example:

    modifier restricted () {

        require(msg.sender == owner);

        _;

    }

We will call our modifier onlyOwner. The code in the modifier will run on functions that use the modifier. In our case, this will ensure that the person calling a function is the manager set in the smart contract. We will also add _; to the modifier so that the compiler knows that we are creating a modifier.