import { AppSyncClient } from '../appsync/appsync-client';
import { Logger } from '../logger';
/**
 * Register the current device's ECDH public key with the backend.
 *
 * Fetches the device identity from the local keychain (creating a new
 * ECDH keypair if one doesn't exist), then calls the `registerDeviceKey`
 * mutation to publish the public half.
 *
 * @param appSyncClient Authenticated AppSyncClient.
 * @param logger Plugin-specific logger so log lines are tagged correctly.
 */
export declare function registerDeviceEncryptionKey(appSyncClient: AppSyncClient, logger: Logger): Promise<void>;