export declare const API_BASE_URL = "https://front.bucket.co";
export declare const SDK_VERSION_HEADER_NAME = "bucket-sdk-version";
export declare const SDK_VERSION: string;
export declare const API_TIMEOUT_MS = 10000;
export declare const END_FLUSH_TIMEOUT_MS = 5000;
export declare const BUCKET_LOG_PREFIX = "[Bucket]";
export declare const FEATURE_EVENT_RATE_LIMITER_WINDOW_SIZE_MS: number;
export declare const FEATURES_REFETCH_MS: number;
export declare const BATCH_MAX_SIZE = 100;
export declare const BATCH_INTERVAL_MS: number;
export declare function loadConfig(file?: string): {
    secretKey: string | undefined;
    logLevel: string | undefined;
    offline: boolean | undefined;
    apiBaseUrl: any;
    featureOverrides: {
        [x: string]: any;
    };
};
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