import type { EvaluationContext, Hook, HookContext, JsonValue } from '@openfeature/server-sdk';
import { ExporterMetadata } from '../model';
/**
 * Enrich the evaluation context with additional information
 */
export declare class EnrichEvaluationContextHook implements Hook {
    private readonly metadata;
    /**
     * Constructor of the Hook
     * @param metadata - metadata to use in order to enrich the evaluation context
     */
    constructor(metadata?: ExporterMetadata);
    /**
     * Enrich the evaluation context with additional information before the evaluation of the flag
     * @param context - The hook context
     * @param hints - Caller provided data
     * @returns The enriched evaluation context
     */
    before<T extends JsonValue>(context: HookContext<T>, _hints?: Record<string, unknown>): Promise<EvaluationContext>;
}