import type { StorageAdapter } from "../StorageAdapter";
import type { StoredUserRecord } from "./types";
import type { UserRecordActor } from "./UserRecordActor";
export declare class UserRecordStorage {
    private readonly storage;
    private readonly versionPrefix;
    private writeChain;
    constructor(storage: StorageAdapter, versionPrefix: string);
    storeUserRecord(publicKey: string, userRecord?: UserRecordActor): Promise<void>;
    loadUserRecord(publicKey: string): Promise<StoredUserRecord | undefined>;
    loadAllUserRecordPubkeys(): Promise<string[]>;
    deleteUserData(publicKey: string): Promise<void>;
    runMigrations(): Promise<void>;
    private deleteUserSessions;
    private sessionKeyPrefix;
    private userRecordKey;
    private userRecordKeyPrefix;
    private versionKey;
}
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