import { _CartFragment } from './generated';
declare type EventMap = Record<string, any>;
declare type EventKey<T extends EventMap> = string & keyof T;
declare type EventReceiver<T> = (params: T) => void;
interface Emitter<T extends EventMap> {
    on<K extends EventKey<T>>(eventName: K, fn: EventReceiver<T[K]>): void;
    off<K extends EventKey<T>>(eventName: K, fn: EventReceiver<T[K]>): void;
    emit<K extends EventKey<T>>(eventName: K, params: T[K]): boolean;
    once<K extends EventKey<T>>(eventName: K, fn: EventReceiver<T[K]>): void;
    removeAllListeners<K extends EventKey<T>>(eventName?: K): void;
    listenerCount<K extends EventKey<T>>(eventName: K): number;
}
declare type STOREFRONT_EVENT_MAP = {
    fetchCartError: Error;
    fetchCartSuccess: _CartFragment | null | undefined;
    createCartError: Error;
    createCartSuccess: _CartFragment | null | undefined;
    addLineItemError: Error;
    addLineItemSuccess: _CartFragment | null | undefined;
    updateLineItemError: Error;
    updateLineItemSuccess: _CartFragment | null | undefined;
    removeLineItemError: Error;
    removeLineItemSuccess: _CartFragment | null | undefined;
};
declare type ALL_ERRORS_MAP = {
    allErrors: {
        type: keyof Pick<STOREFRONT_EVENT_MAP, 'addLineItemError' | 'createCartError' | 'removeLineItemError' | 'updateLineItemError' | 'fetchCartError'>;
        error: Error;
    };
};
declare type ALL_SUCCESSES_MAP = {
    allSuccesses: {
        type: keyof Pick<STOREFRONT_EVENT_MAP, 'addLineItemSuccess' | 'createCartSuccess' | 'removeLineItemSuccess' | 'updateLineItemSuccess' | 'fetchCartSuccess'>;
        data: _CartFragment | null | undefined;
    };
};
declare type MAP = STOREFRONT_EVENT_MAP & ALL_ERRORS_MAP & ALL_SUCCESSES_MAP;
export declare const storefrontEvents: Emitter<MAP>;
export declare type EventHandler<K extends keyof MAP> = (args: MAP[K]) => void;
export {};