import { type TraceContextData } from '@dxos/context';
import type { RemoteSpan, StartSpanOptions, TracingBackend } from './tracing-types';
export declare const BUFFERED_PREFIX = "buffered-";
/**
 * A {@link TracingBackend} that buffers span operations until a real backend
 * registers. On {@link drain}, buffered spans are replayed in FIFO order with
 * parent IDs translated from synthetic `buffered-*` traceparents to real OTEL
 * IDs, preserving the trace hierarchy.
 */
export declare class BufferingTracingBackend implements TracingBackend {
    #private;
    startSpan(options: StartSpanOptions): RemoteSpan;
    /** Discard all buffered spans without replaying them. */
    clear(): void;
    /**
     * Replay all buffered spans into {@link backend}.
     *
     * @returns Map from synthetic buffered traceparent to real {@link TraceContextData},
     *   used by the post-drain translating wrapper to resolve stale buffered IDs
     *   still present on in-flight {@link Context} objects.
     */
    drain(backend: TracingBackend): Map<string, TraceContextData>;
}
//# sourceMappingURL=buffering-backend.d.ts.map