/**
* AQS API Client with rate limiting
*
* Handles authentication, rate limiting (5 seconds between requests),
* and response parsing for all EPA AQS API endpoints.
*/
import type { AqsResponse } from './types.js';
/**
* Validate that begin and end dates are in the same calendar year
*/
export declare function validateDateRange(bdate: string, edate: string): void;
/**
* Validate date format (YYYYMMDD)
*/
export declare function validateDateFormat(date: string, fieldName: string): void;
/**
* Make an authenticated request to the AQS API
*/
export declare function aqs<T>(endpoint: string, params: Record<string, string>): Promise<AqsResponse<T>>;
/**
* Get default credentials from environment variables or hardcoded defaults
*/
export declare function getDefaultCredentials(): {
email?: string;
key?: string;
};
/**
* Resolve credentials - use provided values or fall back to environment variables
*/
export declare function resolveCredentials(providedEmail?: string, providedKey?: string): {
email: string;
key: string;
};
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