import type { CipherSuite, SealStreamOpts } from './types.js';
export declare class SealStream {
    /** Preamble sent before the first chunk: header [|| kemCiphertext] [|| commitment]. */
    readonly preamble: Uint8Array;
    private readonly cipher;
    private readonly keys;
    private readonly chunkSize;
    private readonly framed;
    private counter;
    private state;
    constructor(cipher: CipherSuite, key: Uint8Array, opts?: SealStreamOpts);
    push(chunk: Uint8Array, opts?: {
        aad?: Uint8Array;
    }): Uint8Array;
    finalize(chunk: Uint8Array, opts?: {
        aad?: Uint8Array;
    }): Uint8Array;
    dispose(): void;
    toTransformStream(): TransformStream<Uint8Array, Uint8Array>;
}