Blockchain By Example

Interface implementation – Ctontine contract

The next step is to define the main contract behind our game: Ctontine. In Solidity, when a contract implements an interface, the class agrees to implement all of its methods. Hence, if you miss implementing a function defined in the inherited interface, you’ll get the following error (in Remix):

As we do for inheritance, we use the is keyword to implement the interface, as follows:

contract Ctontine is Itontine {..}

Now, let's fill this empty contract. Within the preceding bracket, we start by declaring the following contract states:

    mapping (address => uint256 ) public Tpension; Cplayer.player[] ...