import type { Chain } from '../../../../sdk/types';
/**
 * Identifies deterministic rejection of the supplied immutable bytes.
 * Operational failures such as worker crashes and queue saturation deliberately
 * use ordinary errors so callers preserve the cache entry and avoid downloading
 * a replacement that cannot be validated.
 *
 * @public
 */
export declare class BulkFileDataValidationError extends Error {
    readonly data?: Uint8Array | undefined;
    constructor(message: string, data?: Uint8Array | undefined);
}
/**
 * Complete immutable bulk-header object supplied to a validator.
 *
 * Implementations must validate the exact byte length and digest as well as
 * every header's linkage, chain work, genesis, and proof of work.
 *
 * @public
 */
export interface BulkFileDataValidationRequest {
    fileName: string;
    data: Uint8Array;
    count: number;
    /** Expected base64 SHA-256 digest. Omit only while producing a new export. */
    fileHash?: string;
    firstHeight: number;
    prevHash: string;
    prevChainWork: string;
    lastHash?: string | null;
    lastChainWork?: string | null;
    chain?: Chain;
}
/** @public */
export interface BulkFileDataValidationResult {
    /** The validated bytes. Worker implementations may transfer ownership. */
    data: Uint8Array;
    fileHash: string;
    lastHeaderHash: string;
    lastChainWork: string;
}
/** @public */
export interface BulkFileDataValidatorStats {
    submitted: number;
    completed: number;
    failed: number;
    rejected: number;
    workerRestarts: number;
    inFlight: number;
    queued: number;
    maxQueueDepth: number;
    totalValidationMsecs: number;
    maxValidationMsecs: number;
}
/**
 * Asynchronous validation boundary for immutable bulk-header objects.
 *
 * Portable runtimes may validate in-process. Node services can inject a
 * worker-backed implementation so proof-of-work validation never blocks the
 * request event loop.
 *
 * @public
 */
export interface BulkFileDataValidatorApi {
    validate(request: BulkFileDataValidationRequest): Promise<BulkFileDataValidationResult>;
    getStats?(): BulkFileDataValidatorStats;
    destroy?(): Promise<void>;
}
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