/**
 * OTLP's protobuf encoding of a trace export, written by hand: an `ExportTraceServiceRequest` from
 * `opentelemetry/proto/collector/trace/v1`, and the partial success its response may carry. What
 * OTLP over gRPC sends, and OTLP/HTTP with `application/x-protobuf`. It runs anywhere: it needs
 * nothing but `TextEncoder`.
 */
import type { OtlpExportRequest } from './otlp.js';
/**
 * An export request in OTLP's protobuf encoding, as a collector takes it over gRPC or OTLP/HTTP with
 * `content-type: application/x-protobuf`.
 */
export declare function encodeOtlpTraceRequest(request: OtlpExportRequest): Uint8Array;
/** What a collector says it rejected of an export it otherwise took, from OTLP's partial success. */
export interface OtlpPartialSuccess {
    /** Spans it rejected. */
    rejectedSpans: number;
    /** Why, in its words. */
    errorMessage?: string;
}
/**
 * Reads an `ExportTraceServiceResponse` in the protobuf encoding: its partial success, or nothing
 * when the collector took every span.
 */
export declare function decodeOtlpTraceResponse(bytes: Uint8Array): OtlpPartialSuccess | undefined;