import type { ExistsResult, ExistsOptions } from './npm.js';
interface PurlObject {
    name: string;
    namespace?: string | undefined;
    qualifiers?: Record<string, string> | undefined;
    subpath?: string | undefined;
    type?: string | undefined;
    version?: string | undefined;
}
/**
 * Check if a Perl module exists on CPAN.
 *
 * Queries MetaCPAN API to verify module existence and retrieve
 * the latest version.
 *
 * @param name - Module name (e.g., 'Moose')
 * @param version - Optional version to validate (e.g., '2.2206')
 * @param options - Optional configuration including cache
 * @returns Promise resolving to existence result with latest version
 *
 * @example
 * ```typescript
 * // Check if module exists
 * const result = await cpanExists('Moose')
 * // -> { exists: true, latestVersion: '2.2206' }
 *
 * // Validate specific version
 * const result = await cpanExists('Moose', '2.2206')
 * // -> { exists: true, latestVersion: '2.2206' }
 *
 * // Non-existent module
 * const result = await cpanExists('FakeModule')
 * // -> { exists: false, error: 'Module not found' }
 * ```
 */
export declare function cpanExists(name: string, version?: string, options?: ExistsOptions): Promise<ExistsResult>;
/**
 * Validate CPAN package URL.
 * CPAN namespace (author/publisher ID) must be uppercase when present.
 */
export declare function validate(purl: PurlObject, throws: boolean): boolean;
export {};