import type { HexString, Subscription } from '@novasamatech/host-api';
export declare const createPreimageManager: (transport?: import("@novasamatech/host-api").Transport) => {
    lookup(key: HexString, callback: (preimage: Uint8Array | null) => void): Subscription<void>;
    submit(value: Uint8Array): Promise<`0x${string}`>;
};
export declare const preimageManager: {
    lookup(key: HexString, callback: (preimage: Uint8Array | null) => void): Subscription<void>;
    submit(value: Uint8Array): Promise<`0x${string}`>;
};