/** Stable HTTP range/session error codes. */
export type HttpErrorCode = 'HTTP_RANGE_UNSUPPORTED' | 'HTTP_RESOURCE_CHANGED' | 'HTTP_RANGE_INVALID' | 'HTTP_BAD_RESPONSE' | 'HTTP_SIZE_UNKNOWN' | 'HTTP_CONTENT_ENCODING' | 'HTTP_STRONG_ETAG_REQUIRED';
/** Error thrown for HTTP range session failures. */
export declare class HttpError extends Error {
    /** Machine-readable error code. */
    readonly code: HttpErrorCode;
    /** Underlying cause, if available. */
    readonly cause?: unknown;
    /** Additional context for serialization. */
    readonly context?: Record<string, string> | undefined;
    constructor(code: HttpErrorCode, message: string, options?: {
        context?: Record<string, string> | undefined;
        cause?: unknown;
    });
    /** Serialize this error into the stable JSON error contract. */
    toJSON(): {
        name: string;
        code: HttpErrorCode;
        message: string;
        context: Record<string, string>;
    };
}
export declare function isHttpError(err: unknown): err is HttpError;
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