import * as RustSdkCryptoJs from "@matrix-org/matrix-sdk-crypto-js";
import type { IEventDecryptionResult, IMegolmSessionData } from "../@types/crypto";
import type { IToDeviceEvent } from "../sync-accumulator";
import type { IEncryptedEventInfo } from "../crypto/api";
import { MatrixEvent } from "../models/event";
import { Room } from "../models/room";
import { RoomMember } from "../models/room-member";
import { CryptoBackend, OnSyncCompletedData } from "../common-crypto/CryptoBackend";
import { IHttpOpts, MatrixHttpApi } from "../http-api";
import { DeviceTrustLevel, UserTrustLevel } from "../crypto/CrossSigning";
/**
 * An implementation of {@link CryptoBackend} using the Rust matrix-sdk-crypto.
 */
export declare class RustCrypto implements CryptoBackend {
    private readonly olmMachine;
    globalErrorOnUnknownDevices: boolean;
    /** whether {@link stop} has been called */
    private stopped;
    /** whether {@link outgoingRequestLoop} is currently running */
    private outgoingRequestLoopRunning;
    /** mapping of roomId → encryptor class */
    private roomEncryptors;
    private keyClaimManager;
    private outgoingRequestProcessor;
    constructor(olmMachine: RustSdkCryptoJs.OlmMachine, http: MatrixHttpApi<IHttpOpts & {
        onlyData: true;
    }>, _userId: string, _deviceId: string);
    stop(): void;
    encryptEvent(event: MatrixEvent, _room: Room): Promise<void>;
    decryptEvent(event: MatrixEvent): Promise<IEventDecryptionResult>;
    getEventEncryptionInfo(event: MatrixEvent): IEncryptedEventInfo;
    checkUserTrust(userId: string): UserTrustLevel;
    checkDeviceTrust(userId: string, deviceId: string): DeviceTrustLevel;
    globalBlacklistUnverifiedDevices: boolean;
    userHasCrossSigningKeys(): Promise<boolean>;
    prepareToEncrypt(room: Room): void;
    forceDiscardSession(roomId: string): Promise<void>;
    exportRoomKeys(): Promise<IMegolmSessionData[]>;
    /**
     * Apply sync changes to the olm machine
     * @param events - the received to-device messages
     * @param oneTimeKeysCounts - the received one time key counts
     * @param unusedFallbackKeys - the received unused fallback keys
     * @returns A list of preprocessed to-device messages.
     */
    private receiveSyncChanges;
    /** called by the sync loop to preprocess incoming to-device messages
     *
     * @param events - the received to-device messages
     * @returns A list of preprocessed to-device messages.
     */
    preprocessToDeviceMessages(events: IToDeviceEvent[]): Promise<IToDeviceEvent[]>;
    /** called by the sync loop to preprocess one time key counts
     *
     * @param oneTimeKeysCounts - the received one time key counts
     * @returns A list of preprocessed to-device messages.
     */
    preprocessOneTimeKeyCounts(oneTimeKeysCounts: Map<string, number>): Promise<void>;
    /** called by the sync loop to preprocess unused fallback keys
     *
     * @param unusedFallbackKeys - the received unused fallback keys
     * @returns A list of preprocessed to-device messages.
     */
    preprocessUnusedFallbackKeys(unusedFallbackKeys: Set<string>): Promise<void>;
    /** called by the sync loop on m.room.encrypted events
     *
     * @param room - in which the event was received
     * @param event - encryption event to be processed
     */
    onCryptoEvent(room: Room, event: MatrixEvent): Promise<void>;
    /** called by the sync loop after processing each sync.
     *
     * TODO: figure out something equivalent for sliding sync.
     *
     * @param syncState - information on the completed sync.
     */
    onSyncCompleted(syncState: OnSyncCompletedData): void;
    /** called by the MatrixClient on a room membership event
     *
     * @param event - The matrix event which caused this event to fire.
     * @param member - The member whose RoomMember.membership changed.
     * @param oldMembership - The previous membership state. Null if it's a new member.
     */
    onRoomMembership(event: MatrixEvent, member: RoomMember, oldMembership?: string): void;
    private outgoingRequestLoop;
}
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