Example counter app using aragonOS

CounterApp.sol

import "@aragon/os/contracts/apps/AragonApp.sol";

contract Counter is AragonApp {
    // ...
    function increment() auth(INCREMENT_ROLE) external {
        value += 1;
        Increment(msg.sender);
    }

    function decrement() auth(DECREMENT_ROLE) external {
        value -= 1;
        Decrement(msg.sender);
    }
}