import type { CID } from 'multiformats/cid';
/** Minimal async block store interface — get/put/has. */
export interface BlockStore {
    get(cid: CID): Promise<Uint8Array>;
    put(cid: CID, bytes: Uint8Array): Promise<void>;
    has(cid: CID): Promise<boolean>;
}
/**
 * A block store that reads locally first, with optional remote fallback.
 * On get: local hit → return; local miss + remote → fetch, write-back, return.
 * put/has always operate on local only.
 */
export declare class LocalFirstBlockStore implements BlockStore {
    private local;
    private remote?;
    constructor(local: BlockStore, remote?: Pick<BlockStore, 'get'>);
    get(cid: CID): Promise<Uint8Array>;
    put(cid: CID, bytes: Uint8Array): Promise<void>;
    has(cid: CID): Promise<boolean>;
}
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