import { opentelemetry } from "./lib";
/**
 * Gets the environment variables for the TraceParent and TraceState of the currently active context
 * Used to propagate the trace context to other processes using environment variables.
 * @returns Object containing `OTEL_TRACE_PARENT` and `OTEL_TRACE_STATE` strings
 */
export declare function getTracePropagationEnvVars(): {
    OTEL_TRACE_PARENT?: undefined;
    OTEL_TRACE_STATE?: undefined;
} | {
    OTEL_TRACE_PARENT: string;
    OTEL_TRACE_STATE: string | undefined;
};
/**
 * Parses the `OTEL_TRACE_PARENT` and `OTEL_TRACE_STATE` environment variables
 * into a SpanContext object that can be set as the active context to continue tracing
 * across garden processes.
 * @returns The SpanContext object derived from the environment variables or `undefined`
 */
export declare function parsePropagationEnvVars(): opentelemetry.api.SpanContext | null;
/**
 * Executes the wrapped callback function using the `SpanContext` extracted via `parsePropagationEnvVars` as the active context.
 * Best called before any spans are created so that all new spans contain the correct tracing context
 * that continues as child spans from the parent process.
 * @param fn The callback function which executes with the propagated parent context
 * @returns A promise resolving with the callback's return value
 */
export declare function withContextFromEnv<T>(fn: () => Promise<T>): Promise<T>;