import { type Interceptor, type StreamRequest, type UnaryRequest } from '@connectrpc/connect';
import { type Attributes } from '@opentelemetry/api';
type RpcRequest = UnaryRequest | StreamRequest;
/**
 * Derives extra attributes from a request. The returned attributes land on both
 * the duration histogram and the client span, so they must stay
 * low-cardinality: no DIDs, keys or URIs, which would explode the metric series.
 */
type GetAttributes = (request: RpcRequest) => Attributes;
/**
 * Records client-side telemetry for every outbound Connect RPC: an
 * `rpc.client.call.duration` histogram and a CLIENT span, with the trace
 * context injected into the request headers so the callee's spans join this
 * trace.
 *
 * The server half of a bsync call is recorded by `@atproto/bsync`'s
 * `withRpcServerTelemetry`, using the same attribute keys.
 */
export declare const createRpcClientInterceptor: (getAttributes?: GetAttributes) => Interceptor;
export {};
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