/**
 * JWE algorithm registry. Two-tier dispatch on `alg` (key management)
 * and `enc` (content encryption). `ECDH-ES` + `A256GCM` are wired at
 * module load. pq-hybrid registers via its standalone module so the
 * core has no post-quantum import.
 */
import { type RecipientFn, type SenderFn } from './types';
/** Register a `(sender, recipient)` pair for an alg. Idempotent. */
export declare function register(alg: string, sender: SenderFn, recipient: RecipientFn): void;
export declare function resolveAlg(alg: string): {
    sender: SenderFn;
    recipient: RecipientFn;
};
export declare function cekLengthForEnc(enc: string): number;