import { ED25519Keypair, ED25519RawPublicKey, ED25519RawSecretKey, ED25519RawSignature } from "./types";
export declare const IV_LENGTH = 12;
export declare const SEED_LENGTH = 32;
export declare const PUBLIC_KEY_LENGTH = 32;
export declare const SECRET_KEY_LENGTH = 64;
export declare const SIGNATURE_LENGTH = 64;
export declare function generateRandomBytes(len: number): Uint8Array;
/**
 * Zeroes a byte buffer in place. Best-effort — JS strings can't be wiped,
 * so decoded base64 keys should be converted to bytes as early as possible
 * and the string reference dropped as soon as practical.
 */
export declare function secureWipe(buf?: Uint8Array): void;
export declare function generateEd25519Keypair(): ED25519Keypair;
export declare function getPublicKeyFromSecretKey(secret: ED25519RawSecretKey): ED25519RawPublicKey;
export declare function sign(secret: ED25519RawSecretKey, message: Uint8Array): Uint8Array;
export declare function verify(publicKey: ED25519RawPublicKey, payload: Uint8Array, signature: ED25519RawSignature): boolean;