import type { ExternalStorage, StorageDriverTargetInfo } from '../converter/extstore';
import type { Payload } from '../interfaces';
import type { ExternalStorageMetricsAccumulator } from './external-storage-metrics';
/** @internal @experimental */
export interface ExternalStoreOptions {
    /** Identity of the workflow or activity that produced the payloads. */
    target?: StorageDriverTargetInfo;
    /** Aborts the in-flight store operation. */
    abortSignal?: AbortSignal;
}
/** @internal @experimental */
export interface ExternalRetrieveOptions {
    /** Aborts the in-flight retrieve operation. */
    abortSignal?: AbortSignal;
}
/**
 * Drives External Storage operations against a configured {@link ExternalStorage}.
 *
 * @internal
 * @experimental
 */
export declare class ExternalStorageRunner {
    private readonly externalStorage;
    private readonly metrics?;
    constructor(externalStorage: ExternalStorage, metrics?: ExternalStorageMetricsAccumulator | undefined);
    /**
     * Replace each payload above the configured size threshold with a reference payload.
     * Payloads below the threshold (or that the selector keeps inline) pass through
     * unchanged. Order is preserved.
     */
    store(payloads: Payload[], options?: ExternalStoreOptions): Promise<Payload[]>;
    /**
     * Replace each reference payload in `payloads` with the payload bytes returned by the
     * named driver. Non-reference payloads are passed through unchanged. Order is preserved.
     */
    retrieve(payloads: Payload[], options?: ExternalRetrieveOptions): Promise<Payload[]>;
}