@awcrotwell/motion/dist/interfaces/event_interface.d.ts

Motion allows you to build reactive, real-time frontend UI components in your Amber application using pure Crystal that are reusable, testable & encapsulated. For brevity, we will call them MotionComponents.

import ITarget from './target_interface';
export default interface IEvent {
    extraData: string | null;
    type: string;
    currentTarget: ITarget;
    target: ITarget;
    details: {};
}