export declare interface EncryptionConfig {
  enabled?: boolean
  algorithm?: 'aes-256-gcm' | 'aes-128-gcm'
  keyRotationInterval?: number
  channelKeys?: Map<string, string>
}
export declare class EncryptionManager {
  constructor(config?: EncryptionConfig);
  isEnabled(): boolean;
  setChannelKey(channel: string, keyString: string): Promise<void>;
  generateChannelKey(channel: string): Promise<string>;
  encrypt(channel: string, data: unknown): Promise<string>;
  decrypt(channel: string, encryptedData: string): Promise<unknown>;
  hasChannelKey(channel: string): boolean;
  getChannelKey(channel: string): string | undefined;
  rotateChannelKey(channel: string): Promise<string>;
  removeChannelKey(channel: string): void;
}