import type { MlKemLike, KemDecapResult } from './types.js';
export declare class RatchetKeypair {
    readonly ek: Uint8Array;
    private _dk;
    private _used;
    constructor(kem: MlKemLike);
    decap(kem: MlKemLike, rk: Uint8Array, kemCt: Uint8Array, context?: Uint8Array): KemDecapResult;
    dispose(): void;
}