import type { SyncConfig } from '@tanstack/react-db';
import type { DecodedEntity } from '../../../core/index.js';
import type { CollectionItem } from '../../domain/collection-item/index.js';
/**
 * The mount-time callbacks TanStack hands a collection's `sync` function: the
 * transaction primitives (`begin`/`write`/`commit`) plus readiness/truncate. This
 * is the parameter object of `SyncConfig['sync']`, not a separately exported name.
 */
type SyncCallbacks<T extends object> = Parameters<SyncConfig<T, string>['sync']>[0];
/**
 * The TanStack write side of a mounted collection. Constructed per-mount with
 * callbacks in hand; the instance's existence is the mounted state.
 */
type Projector<TItem> = {
    projectEntities: (entities: DecodedEntity<TItem>[]) => void;
};
type ProjectorOptions<TItem> = {
    deleteKeyOf?: (entity: DecodedEntity<TItem>) => string | null;
};
/**
 * Builds the per-mount projector that turns accepted deltas into TanStack
 * update/delete writes. Translation hoists an entity's `value` fields to the top
 * level and nests its meta under `_meta`. The collection derives live row keys via
 * its own `getKey`; tombstone deletes carry keys from `deleteKeyOf`.
 */
export declare const makeCollectionProjector: <TItem>(callbacks: SyncCallbacks<CollectionItem<TItem>>, options?: ProjectorOptions<TItem>) => Projector<TItem>;
export {};
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