import { CloudEvent } from "./core";
import { EventContext as V1EventContext } from "../v1";
export type V1Compat<DataName extends string, DataType, ContextType = V1EventContext> = {
    [K in DataName]: DataType;
} & {
    context: ContextType;
};
/**
 * Patches a CloudEvent with V1 compatibility properties via getters.
 * This function ensures idempotency by using a Symbol to mark already patched events.
 * @param event The CloudEvent to patch.
 * @param getters A map of getters to attach to the event object.
 * @returns The patched CloudEvent with V1 compatibility properties.
 */
export declare function addV1Compat<T extends CloudEvent<unknown>, U extends Record<string, () => any>>(event: T, getters: U): T & {
    [K in keyof U]: ReturnType<U[K]>;
};