import { Messenger } from "@metamask/base-controller";
import type { AllowedActions, MultichainAccountServiceMessenger } from "../types.mjs";
/**
 * Creates a new root messenger instance for testing.
 *
 * @returns A new Messenger instance.
 */
export declare function getRootMessenger(): Messenger<AllowedActions, import("@metamask/keyring-controller").KeyringControllerStateChangeEvent>;
/**
 * Retrieves a restricted messenger for the MultichainAccountService.
 *
 * @param messenger - The root messenger instance. Defaults to a new Messenger created by getRootMessenger().
 * @returns The restricted messenger for the MultichainAccountService.
 */
export declare function getMultichainAccountServiceMessenger(messenger: ReturnType<typeof getRootMessenger>): MultichainAccountServiceMessenger;
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