import crypto from 'crypto';
export interface Keypair {
    sk: crypto.KeyObject;
    pk: crypto.KeyObject;
}
export declare const generateX25519KeyPair: () => Promise<Keypair>;
export declare function publicKeyObjectToRawkey(publicKey: crypto.KeyObject): Uint8Array;
export declare const signWithEd25519: (message: Uint8Array, privateKey: crypto.KeyObject) => Promise<Uint8Array>;
export declare function base64urlToBuffer(base64url: string): Uint8Array;
export declare function getRandomBytes(length: number): Uint8Array;
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