import type { NMVideoPlayer } from '../../index.js';
import type { VideoPlaylistItem } from '../../types.js';
import { Plugin } from '@nomercy-entertainment/nomercy-player-core';
/** Options for the video {@link DrmPlugin}. */
export interface DrmOptions {
    /** EME key system identifier — `'com.widevine.alpha' | 'com.apple.fps' | 'com.microsoft.playready'` etc. */
    keySystem: string;
    /** License server URL. */
    licenseUrl: string;
    /** Service certificate for FairPlay (optional for Widevine/PlayReady). */
    certificate?: ArrayBuffer | string;
    /** Optional request signer for license calls (HMAC etc.). */
    customSignRequest?: (request: Request) => Request | Promise<Request>;
    /** Optional license request body transformer. */
    transformLicenseRequest?: (challenge: ArrayBuffer) => ArrayBuffer | Promise<ArrayBuffer>;
    /** Optional license response body transformer. */
    transformLicenseResponse?: (response: ArrayBuffer) => ArrayBuffer | Promise<ArrayBuffer>;
    /** Output protection requirements. */
    hdcpRequired?: 'type-0' | 'type-1' | 'none';
}
/** Events emitted by the video {@link DrmPlugin}. */
export interface DrmEvents {
    'key:error': {
        sessionId: string;
        error: Error;
    };
    'unsupported': {
        reason: string;
    };
}
/**
 * EME DRM coordination plugin. Handles license acquisition for Widevine /
 * FairPlay / PlayReady and routes HDCP / output-protection signals.
 *
 * Stub-but-loadable: registration + lifecycle is real, license fetch routing
 * (with optional `customSignRequest`) is real, but the actual EME key-system
 * handshake is gated behind `requestMediaKeySystemAccess` so JSDOM and other
 * environments without EME stay quiet. When the API is missing, an
 * `unsupported` event is emitted and the plugin exits cleanly.
 */
export declare class DrmPlugin<T extends VideoPlaylistItem = VideoPlaylistItem> extends Plugin<NMVideoPlayer<T>, DrmOptions, DrmEvents> {
    static readonly id: string;
    static readonly version: string;
    static readonly description: string;
    private supported;
    /** Probes EME availability and wires the `current` listener to trigger the key-system handshake. */
    use(): void;
    /** Resets EME support state on teardown. */
    dispose(): void;
    /**
     * Fetch a license blob from the configured license server. Wraps the
     * request through `customSignRequest` when provided so callers can apply
     * HMAC / proprietary signing without subclassing.
     */
    fetchLicense(challenge: ArrayBuffer): Promise<ArrayBuffer>;
    /** Returns the backend's `mediaKeys` if EME is supported and bound. */
    mediaKeys(): MediaKeys | null;
    private tryHandshake;
}
/** Plugin alias for the video {@link DrmPlugin}. Pass to `addPlugin(drmPlugin)`. */
export declare const drmPlugin: typeof DrmPlugin;