import { ClassicLevel } from "classic-level";
import { Logger } from "@lodestar/utils";
import { DatabaseController, DatabaseOptions, DbBatch, DbReqOpts, FilterOptions, KeyValue } from "./interface.js";
import { LevelDbControllerMetrics } from "./metrics.js";
export interface LevelDBOptions extends DatabaseOptions {
    db?: ClassicLevel<Uint8Array, Uint8Array>;
}
export type LevelDbControllerModules = {
    logger: Logger;
    metrics?: LevelDbControllerMetrics | null;
};
/**
 * The LevelDB implementation of DB
 */
export declare class LevelDbController implements DatabaseController<Uint8Array, Uint8Array> {
    private readonly logger;
    private readonly db;
    private metrics;
    private status;
    private dbSizeMetricInterval?;
    constructor(logger: Logger, db: ClassicLevel<Uint8Array, Uint8Array>, metrics: LevelDbControllerMetrics | null);
    static create(opts: LevelDBOptions, { metrics, logger }: LevelDbControllerModules): Promise<LevelDbController>;
    close(): Promise<void>;
    /** To inject metrics after CLI initialization */
    setMetrics(metrics: LevelDbControllerMetrics): void;
    clear(): Promise<void>;
    get(key: Uint8Array, opts?: DbReqOpts): Promise<Uint8Array | null>;
    /**
     * Return the multiple items in the order of the given keys
     * Will return `null` for the keys which does not exists
     *
     * https://github.com/Level/abstract-level?tab=readme-ov-file#dbgetmanykeys-options
     */
    getMany(keys: Uint8Array[], opts?: DbReqOpts): Promise<(Uint8Array | undefined)[]>;
    put(key: Uint8Array, value: Uint8Array, opts?: DbReqOpts): Promise<void>;
    delete(key: Uint8Array, opts?: DbReqOpts): Promise<void>;
    batchPut(items: KeyValue<Uint8Array, Uint8Array>[], opts?: DbReqOpts): Promise<void>;
    batchDelete(keys: Uint8Array[], opts?: DbReqOpts): Promise<void>;
    batch(batch: DbBatch<Uint8Array, Uint8Array>, opts?: DbReqOpts): Promise<void>;
    keysStream(opts?: FilterOptions<Uint8Array>): AsyncIterable<Uint8Array>;
    valuesStream(opts?: FilterOptions<Uint8Array>): AsyncIterable<Uint8Array>;
    entriesStream(opts?: FilterOptions<Uint8Array>): AsyncIterable<KeyValue<Uint8Array, Uint8Array>>;
    keys(opts?: FilterOptions<Uint8Array>): Promise<Uint8Array[]>;
    values(opts?: FilterOptions<Uint8Array>): Promise<Uint8Array[]>;
    entries(opts?: FilterOptions<Uint8Array>): Promise<KeyValue<Uint8Array, Uint8Array>[]>;
    /**
     * Get the approximate number of bytes of file system space used by the range [start..end).
     * The result might not include recently written data.
     */
    approximateSize(start: Uint8Array, end: Uint8Array): Promise<number>;
    /**
     * Manually trigger a database compaction in the range [start..end].
     */
    compactRange(start: Uint8Array, end: Uint8Array): Promise<void>;
    /** Capture metrics for db.iterator, db.keys, db.values .all() calls */
    private metricsAll;
    /** Capture metrics for db.iterator, db.keys, db.values AsyncIterable calls */
    private metricsIterator;
    /** Start interval to capture metric for db size */
    private collectDbSizeMetric;
    /** Capture metric for db size */
    private dbSizeMetric;
    static destroy(location: string): Promise<void>;
}
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