/**
 * Visits payloads for External Storage and applies payload transformations via
 * {@link ExternalStorageRunner}.
 *
 * @module
 */
import type { ConcurrencyLimit } from '../concurrency/limit';
import type { ExternalStorage, StorageDriverTargetInfo } from '../converter/extstore';
import type { ExternalStorageMetricsAccumulator } from './external-storage-metrics';
import type { ContextDeriver, VisitOptions } from './payload-visitor';
/**
 * The storage target in scope at a given payload site during a store walk. It starts at
 * {@link ExternalStorageStoreOptions.initialTarget} and {@link ExternalStorageStoreOptions.deriveContext}
 * may retarget it per message (e.g. a child-workflow command retargets its payloads at the child).
 */
type StoreTarget = StorageDriverTargetInfo | undefined;
/** @internal @experimental */
export interface ExternalStorageStoreOptions {
    /** Storage target before any message is entered (the initial enclosing workflow / activity). */
    initialTarget?: StorageDriverTargetInfo;
    /** Derives new storage target from the current message. */
    deriveContext?: ContextDeriver<StoreTarget>;
    /** Bounds concurrent transform calls across payload sites. Omit for sequential. */
    limit?: ConcurrencyLimit;
    /** Aborts the walk and every in-flight driver call. */
    abortSignal?: AbortSignal;
    /** Collects metrics of the store operations performed during the walk. */
    metrics?: ExternalStorageMetricsAccumulator;
}
/**
 * @internal
 * @experimental
 */
export declare function extstoreStoreOptions(externalStorage: ExternalStorage, { initialTarget, deriveContext, limit, abortSignal, metrics }?: ExternalStorageStoreOptions): VisitOptions<StoreTarget>;
/**
 * The inbound External Storage pass for a worker/client boundary: resolve reference payloads when
 * {@link ExternalStorage} is configured, otherwise fail loudly (via {@link extstoreDetectReferencesOptions})
 * because nothing can resolve them.
 *
 * @internal
 * @experimental
 */
export declare function extstoreInboundOptions(externalStorage: ExternalStorage | undefined, { metrics }?: {
    metrics?: ExternalStorageMetricsAccumulator;
}): VisitOptions<void>;
export {};