/**
 * CRUD for redis_keys table.
 */
import type Database from './driver.ts';
/** A redis_keys row. expiresAt is a BigInt when it exceeds the safe integer range. */
export interface KeyMeta {
    key: Buffer;
    type: number;
    expiresAt: number | bigint | null;
    setCount: number | null;
    hashCount: number | null;
    zsetCount: number | null;
    version: number;
    updatedAt: number;
}
export interface KeySetOptions {
    updatedAt?: number;
    expiresAt?: number | bigint | null;
    existingMeta?: KeyMeta | null;
    setCount?: number | null;
    hashCount?: number | null;
    zsetCount?: number | null;
}
export interface CountUpdateOptions {
    touchUpdatedAt?: boolean;
    updatedAt?: number;
}
export interface KeyCounter {
    /** Rows in redis_keys, including expired keys not yet removed. */
    get(): number;
    /** Record rows inserted (+) or deleted (-) by a statement that just ran on this connection. */
    add(delta: number | bigint): void;
}
/**
 * In-memory row count of redis_keys for a connection, counted once when first requested.
 * Every statement on this connection that inserts or deletes redis_keys rows reports
 * its change count; rolled-back deltas are undone. Commits by other connections change
 * PRAGMA data_version, which triggers one recount.
 */
export declare function getKeyCounter(db: Database): KeyCounter;
export declare function createKeysStorage(db: Database): {
    KEY_TYPES: {
        STRING: number;
        HASH: number;
        SET: number;
        LIST: number;
        ZSET: number;
    };
    get(key: Buffer): KeyMeta | null;
    set(key: Buffer, type: number, options?: KeySetOptions): void;
    setExpires(key: Buffer, expiresAt: number | bigint | null, updatedAt?: number): void;
    bumpVersion(key: Buffer): void;
    setSetCount(key: Buffer, setCount: number, options?: CountUpdateOptions): void;
    incrSetCount(key: Buffer, delta: number, options?: CountUpdateOptions): void;
    setHashCount(key: Buffer, hashCount: number, options?: CountUpdateOptions): void;
    incrHashCount(key: Buffer, delta: number, options?: CountUpdateOptions): void;
    setZsetCount(key: Buffer, zsetCount: number, options?: CountUpdateOptions): void;
    incrZsetCount(key: Buffer, delta: number, options?: CountUpdateOptions): void;
    delete(key: Buffer): import("node:sqlite").StatementResultingChanges;
    deleteAll(): number | bigint;
    deleteExpired(now: number): import("node:sqlite").StatementResultingChanges;
    /** Rows in redis_keys, including expired keys not yet removed. */
    count(): number;
    /** Keys that are logically live at now: excludes expired keys and hashes whose fields all expired. */
    countLive(now: number): number;
    scan(limit: number, offset: number): Buffer[];
};
export type KeysStorage = ReturnType<typeof createKeysStorage>;