import { CarReader } from '@ipld/car';
import { CID } from 'multiformats/cid';
export interface BlockStoreForFetch {
    get(cid: CID): Promise<Uint8Array | undefined>;
    put(cid: CID, bytes: Uint8Array): Promise<void>;
}
export interface FetchChainOptions {
    rootCID: CID;
    stopAtCID?: CID;
    stopAtCounter?: number;
    fetchBlock: (cid: CID) => Promise<CarReader>;
    fetchAll: (cid: CID) => Promise<CarReader>;
    maxDepth?: number;
}
export interface FetchChainResult {
    rootCID: CID;
    blockStore: BlockStoreForFetch;
    /** Serializable blocks array for worker boundary crossing */
    blocks: [string, Uint8Array][];
    snapshotCount: number;
    counterRange?: {
        minCounter: number;
        maxCounter: number;
    };
}
/**
 * Fetches a snapshot chain iteratively, stopping at stopAtCID.
 * Uses 3 requests per snapshot: root(block), applogs(all), info(all).
 * This avoids the gateway's dag-scope=all following prev links recursively.
 */
export declare function fetchSnapshotChainUntil(options: FetchChainOptions): Promise<FetchChainResult>;
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