export type HostBridgeMessage = Record<string, unknown> & {
    type?: unknown;
};
export type HostBridgeSubscription = {
    remove: () => void;
};
export type HostBridgeMessaging = {
    addMessageListener: (handler: (event: HostBridgeMessage) => void) => HostBridgeSubscription;
    sendMessage: (message: HostBridgeMessage) => void;
};
export declare const createHostBridge: <TRequest extends string = string, TEvent extends {
    type: string;
} = {
    type: string;
}>(messaging: HostBridgeMessaging) => {
    request: <T extends Record<string, unknown>>(type: TRequest, payload?: Record<string, unknown>) => Promise<T>;
    send: (type: TRequest, payload?: Record<string, unknown>) => void;
    subscribe: <E extends TEvent>(eventType: E["type"], handler: (event: E) => void) => (() => void);
};
//# sourceMappingURL=host_bridge.d.ts.map