import { type Client } from "viem";
import { type AlchemyTransport } from "../transport/alchemy.js";
/**
 * TODO: need to figure out if there's a better way than this...
 * This adds a tracing breadcrumb to the client during requests.
 * It returns a basic client without the previously extended actions.
 * That means you MUST use viem's `getAction` method within actions in case the action is being called from an action that attached a breadcrumb.
 * That method works by taking a fallback, looking up the action on the client, if it finds it calls it, otherwise it calls the fallback.
 *
 * @param {Client<AlchemyTransport>} client a client using the alchemy transport
 * @param {string} breadcrumb the breadcrumb to add to the tracing headers
 * @returns {Client<AlchemyTransport>} a client with the transport updated to include the breadcrumb
 */
export declare function addBreadCrumb(client: Client<AlchemyTransport>, breadcrumb: string): Client<AlchemyTransport>;
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