import { KeyDescription, Key } from "./common";
import type { Storage } from "../storage/idb/Storage";
import type { Transaction } from "../storage/idb/Transaction";
import type { Platform } from "../../platform/web/Platform.js";
import type * as OlmNamespace from "@matrix-org/olm";
type Olm = typeof OlmNamespace;
export declare enum KeyType {
    "RecoveryKey" = 0,
    "Passphrase" = 1
}
export declare function writeKey(key: Key, keyBackupVersion: number, txn: Transaction): Promise<number | undefined>;
export declare function readKey(txn: Transaction): Promise<Key | undefined>;
export declare function removeKey(txn: Transaction): Promise<void>;
export declare function keyFromCredential(type: KeyType, credential: string, storage: Storage, platform: Platform, olm: Olm): Promise<Key>;
export declare function keyFromCredentialAndDescription(type: KeyType, credential: string, keyDescription: KeyDescription, platform: Platform, olm: Olm): Promise<Key>;
export declare function keyFromDehydratedDeviceKey(key: Key, storage: Storage, platform: Platform): Promise<Key | undefined>;
export {};