// Define events to be emitted on state changes
+ event EmergencyModeSet(bool mode);
+ event TokenAllowed(address token);

contract PrelaunchPoints {

    ...

    function setEmergencyMode(bool _mode) external onlyAuthorized {
+       emit EmergencyModeSet(_mode);
        emergencyMode = _mode;
    }

    function allowToken(address _token) external onlyAuthorized {
+       emit TokenAllowed(_token);
        isTokenAllowed[_token] = true;
    }

    ...
}
