import type { ErrorCode } from '@openfeature/core';
import type { EvaluationResponse, MetadataResponse } from './evaluation';
import type { EventStream } from './event-stream';
export interface BulkEvaluationFailureResponse extends MetadataResponse {
    /**
     * An appropriate code specific to the bulk evaluation error. See https://openfeature.dev/specification/types#error-code
     */
    errorCode: ErrorCode;
    /**
     * Optional error details description for logging or other needs
     */
    errorDetails?: string;
}
export declare function isBulkEvaluationFailureResponse(response: unknown): response is BulkEvaluationFailureResponse;
export interface BulkEvaluationSuccessResponse extends MetadataResponse {
    flags?: EvaluationResponse[];
    /**
     * Optional array of real-time change notification connections (ADR-0008).
     */
    eventStreams?: EventStream[];
}
export type BulkEvaluationNotModifiedResponse = undefined;
export declare function isBulkEvaluationSuccessResponse(response: unknown): response is BulkEvaluationSuccessResponse;
export type BulkEvaluationResponse = BulkEvaluationFailureResponse | BulkEvaluationNotModifiedResponse | BulkEvaluationSuccessResponse;
/**
 * Optional metadata from an SSE `refetchEvaluation` event, passed as query parameters
 * to the bulk evaluation endpoint so the server can return an optimized diff response.
 * Per ADR-0008.
 */
export interface BulkEvaluationRefetchMetadata {
    /** ETag of the flag configuration that triggered the refetch event. */
    flagConfigEtag?: string;
    /** Last-modified timestamp of the flag configuration. */
    flagConfigLastModified?: string | number;
}