export declare type MachineStep<T> = {
    name: string;
    onStart?: (state: MachineState<T>) => void;
    onTick?: (state: MachineState<T>) => void;
    onLeave?: (state: MachineState<T>) => void;
    nextState?: (state: MachineState<T>) => string | undefined;
};
export declare type MachineState<T> = T & {
    stepStartTs: number;
};
export declare class StateMachine<T> {
    steps: MachineStep<T>[];
    currentState: MachineStep<T>;
    internalState: MachineState<T>;
    constructor(steps: MachineStep<T>[], initState: T, currentStateName?: string);
    goToState(name: string): void;
    tick(): void;
    testNextState(): void;
}