export declare function encodeNumber(value: number): Uint8Array;
export declare function encodeString(value: string): Uint8Array;
export declare function decodeString(value: Uint8Array): string;
export declare function createAddressPayload(address: string, genesisHash: string): Uint8Array;
export declare function createSignPayload(address: string, cmd: number, payload: string | Uint8Array, genesisHash: string | Uint8Array): Uint8Array;
export declare function createFrames(input: Uint8Array): Uint8Array[];
export declare function createImgSize(size?: string | number): Record<string, string>;