import type { DevicePublicKey } from './contract';
import type { BoatKeyStore } from './keystore';
import { type RejectedDevice, type SealedFrame } from './sealing';
export type SealVerdict = {
    mode: 'sealed';
    frame: SealedFrame;
} | {
    mode: 'blocked';
    reason: string;
};
export interface SealerDeps {
    keys: BoatKeyStore;
    devices: () => DevicePublicKey[];
    latched: () => boolean;
    boatId: () => string | undefined;
    debug: (msg: string) => void;
}
export interface SealState {
    mode: 'sealed' | 'blocked' | 'none';
    reason: string | null;
}
export declare class Sealer {
    private readonly deps;
    private lastComplaint;
    private lastMode;
    private lastReason;
    private lastRejected;
    constructor(deps: SealerDeps);
    rejections(): RejectedDevice[];
    state(): SealState;
    seal(frame: unknown): SealVerdict;
    answer(payload: unknown, id: string): SealVerdict;
    open(envelope: unknown): {
        id: string;
        plaintext: string;
    } | undefined;
    private sealPayload;
    private blocked;
}