import * as oasis from '@oasisprotocol/client';
export declare function toKey(module: string, code: number): Uint8Array;
export type Handler<V> = (e: oasis.types.RuntimeClientEvent, value: V) => void;
export type ModuleHandler = [module: string, codes: {
    [code: number]: Handler<never>;
}];
export declare class Visitor {
    handlers: {
        [keyHex: string]: Handler<never>;
    };
    constructor(modules: ModuleHandler[]);
    /**
     * Calls one of the handlers based on a given event's key.
     * @param e The event
     * @returns `true` if the event matched one of the handlers
     */
    visit(e: oasis.types.RuntimeClientEvent): boolean;
}