/** returns a base64 encoded string representation of the legacy signature */
export declare function sign(message: string, privateKey: Uint8Array, compressed?: boolean): string;
export declare function signPQMessage(message: string, privateKey: Uint8Array, publicKey: Uint8Array): string;
export declare function verifyLegacyMessage(message: string, address: string, signature: string | Uint8Array): any;
export declare function verifyPQMessage(message: string, address: string, signature: string | Uint8Array): any;
export declare function verifyMessage(message: string, address: string, signature: string | Uint8Array): any;