import type { UnsentStateEvent } from "../room/common";
import type { ILogItem } from "../../logging/types";
export declare enum DecryptionSource {
    Sync = 0,
    Timeline = 1,
    Retry = 2
}
export declare const SESSION_E2EE_KEY_PREFIX = "e2ee:";
export declare const OLM_ALGORITHM = "m.olm.v1.curve25519-aes-sha2";
export declare const MEGOLM_ALGORITHM = "m.megolm.v1.aes-sha2";
export declare class DecryptionError extends Error {
    private readonly code;
    private readonly event;
    private readonly detailsObj?;
    constructor(code: string, event: object, detailsObj?: object | undefined);
}
export declare const SIGNATURE_ALGORITHM = "ed25519";
export type SignedValue = {
    signatures?: {
        [userId: string]: {
            [keyId: string]: string;
        };
    };
    unsigned?: object;
};
export type DeviceKey = SignedValue & {
    readonly user_id: string;
    readonly device_id: string;
    readonly algorithms: ReadonlyArray<string>;
    readonly keys: {
        [keyId: string]: string;
    };
    readonly unsigned: {
        device_display_name?: string;
    };
};
export declare function getDeviceEd25519Key(deviceKey: DeviceKey): string;
export declare function getDeviceCurve25519Key(deviceKey: DeviceKey): string;
export declare function getEd25519Signature(signedValue: SignedValue, userId: string, deviceOrKeyId: string): string | undefined;
export declare enum SignatureVerification {
    Valid = 0,
    Invalid = 1,
    NotSigned = 2
}
export declare function verifyEd25519Signature(olmUtil: Olm.Utility, userId: string, deviceOrKeyId: string, ed25519Key: string, value: SignedValue, log?: ILogItem): SignatureVerification;
export declare function createRoomEncryptionEvent(): UnsentStateEvent;
export declare enum HistoryVisibility {
    Joined = "joined",
    Invited = "invited",
    WorldReadable = "world_readable",
    Shared = "shared"
}
export declare function shouldShareKey(membership: string, historyVisibility: HistoryVisibility): boolean;