import type { EvaluationContext, Logger } from '@openfeature/core';
export declare const flagdPropertyKey = "$flagd";
export declare const flagKeyPropertyKey = "flagKey";
export declare const timestampPropertyKey = "timestamp";
export declare const targetingPropertyKey = "targetingKey";
export declare const loggerSymbol: unique symbol;
export type EvaluationContextWithLogger = EvaluationContext & {
    [loggerSymbol]: Logger;
};
export declare function getLoggerFromContext(context: EvaluationContextWithLogger): Logger;