/**
 * @fileoverview Defines the core logic, schemas, and types for the `echo` resource.
 * This module includes a Zod schema for query parameter validation, type definitions,
 * and the main processing function that constructs the resource response.
 * @module src/mcp-server/resources/echoResource/echoResourceLogic
 */
import { z } from "zod";
import { type RequestContext } from "../../../utils/index.js";
/**
 * Zod schema defining expected query parameters for the echo resource.
 */
export declare const EchoResourceQuerySchema: z.ZodObject<{
    message: z.ZodOptional<z.ZodString>;
}, "strip", z.ZodTypeAny, {
    message?: string | undefined;
}, {
    message?: string | undefined;
}>;
/**
 * TypeScript type inferred from the {@link EchoResourceQuerySchema}.
 */
export type EchoResourceParams = z.infer<typeof EchoResourceQuerySchema>;
/**
 * Defines the structure of the JSON payload returned by the `processEchoResource` function.
 */
export interface EchoResourceResponsePayload {
    message: string;
    timestamp: string;
    requestUri: string;
}
/**
 * Processes the core logic for an echo resource request.
 * @param uri - The full URL object of the incoming resource request.
 * @param params - The validated query parameters for the request.
 * @param context - The request context, used for logging and tracing the operation.
 * @returns The data payload for the response.
 */
export declare function echoResourceLogic(uri: URL, params: EchoResourceParams, context: RequestContext): Promise<EchoResourceResponsePayload>;