export interface QueueRecord {
    schemaVersion: number;
    installId: string;
    mmaVersion: string;
    os: 'darwin' | 'linux' | 'win32' | 'other';
    nodeMajor: number;
    generation: number;
    events: Record<string, unknown>[];
}
/**
 * What `truncate()` needs to verify a batch before cutting it: where each record starts, and what
 * it hashed to. A `byteLength` sat here too, set on every record and read by nothing — `truncate`
 * compares `sha256` and `byteOffset` and derives the rest from the buffer.
 */
interface RecordMeta {
    byteOffset: number;
    sha256: string;
}
export interface ReadBatchResult {
    records: QueueRecord[];
    meta: RecordMeta[];
}
export declare class Queue {
    #private;
    constructor(dir: string);
    get queuePath(): string;
    append(record: QueueRecord): Promise<void>;
    readBatch(maxRecords?: number): Promise<ReadBatchResult>;
    /**
     * Remove records whose SHA-256 hashes are in the provided set.
     * Rebuilds the queue file from scratch — safe for arbitrary (non-contiguous)
     * removal. Returns the number of records actually removed.
     */
    removeRecords(hashes: Set<string>): Promise<number>;
    truncate(expectedMeta: RecordMeta[]): Promise<void>;
}
export {};
//# sourceMappingURL=queue.d.ts.map