import type { IncomingHttpHeaders } from 'node:http';
import type { OTLPGRPCExporterConfigNode } from '@opentelemetry/otlp-grpc-exporter-base';
import type { KnownKeys } from '@waiting/shared-types';
import type { Config, MiddlewareConfig, MiddlewareOptions, SpanStatusOptions } from './types.js';
/**
 * Initial config, contains:
 * - authorization
 * - host
 * - user-agent
 */
export declare const initCaptureRequestHeaders: (string | KnownKeys<IncomingHttpHeaders>)[];
export declare const initialConfig: Readonly<Omit<Config, 'tracerConfig'>>;
export declare const initMiddlewareOptions: MiddlewareOptions;
export declare const initialMiddlewareConfig: Readonly<Omit<MiddlewareConfig, 'ignore' | 'match' | 'options'>>;
export declare const initTracerIgnoreArray: readonly (string | RegExp)[];
export declare const initSpanStatusOptions: SpanStatusOptions;
/**
 * env: OTEL_EXPORTER_OTLP_ENDPOINT
 * https://opentelemetry.io/docs/reference/specification/protocol/exporter/#configuration-options
 * https://www.npmjs.com/package/@opentelemetry/exporter-trace-otlp-grpc
 * @default http://localhost:4317
 * @example http://127.0.0.1:4317
 */
export declare const exporterEndpoint: string;
/**
 * https://www.npmjs.com/package/@opentelemetry/exporter-trace-otlp-grpc
 * https://opentelemetry.io/docs/reference/specification/protocol/exporter/#configuration-options
 */
export declare const initOtlpGrpcExporterConfig: OTLPGRPCExporterConfigNode;
export declare const KEY_Trace = "decorator:key_Trace";
export declare const METHOD_KEY_TraceInit = "decorator:method_key_TraceInit";
export declare const METHOD_KEY_TraceLog = "decorator:method_key_TraceLog";