import { type KeyObject } from 'crypto';
import type { DevicePublicKey } from './contract';
export declare const MAC_BYTES = 32;
export interface DeviceAnchor {
    kid: string;
    pub: string;
}
export declare function approvalInput(boat: string, approverKid: string, subjectKid: string, subjectPub: Buffer): Buffer;
export declare function computeApproval(opts: {
    approverPriv: KeyObject;
    inboxPub: Buffer;
    boat: string;
    approverKid: string;
    subjectKid: string;
    subjectPub: Buffer;
}): Buffer;
export declare function verifyApproval(opts: {
    inboxPriv: KeyObject;
    approverPub: Buffer;
    boat: string;
    approverKid: string;
    subjectKid: string;
    subjectPub: Buffer;
    mac: Buffer;
}): boolean;
export interface SkippedDevice {
    kid: string;
    reason: string;
}
export interface AcceptResult {
    accepted: DevicePublicKey[];
    skipped: SkippedDevice[];
    pinned: boolean;
}
export declare function acceptDevices(opts: {
    anchor: DeviceAnchor | null | 'broken';
    entries: DevicePublicKey[];
    inboxPriv: KeyObject | undefined;
    boat: string | undefined;
}): AcceptResult;