/**
 * @fractary/core - GitHub App Token Provider
 *
 * TokenProvider implementation that wraps GitHubAppAuth.
 */
import type { TokenProvider, GitHubAppConfig } from './types';
/**
 * GitHub App token provider
 *
 * Implements the TokenProvider interface using GitHub App authentication.
 * Wraps GitHubAppAuth to provide automatic token caching and refresh.
 *
 * @example
 * ```typescript
 * const provider = new GitHubAppTokenProvider({
 *   id: '123456',
 *   installation_id: '789012',
 *   private_key_path: '/path/to/private-key.pem'
 * });
 *
 * const token = await provider.getToken();
 * ```
 */
export declare class GitHubAppTokenProvider implements TokenProvider {
    private readonly auth;
    /**
     * Create a new GitHub App token provider
     *
     * @param config GitHub App configuration
     * @throws AuthenticationError if private key cannot be loaded
     */
    constructor(config: GitHubAppConfig);
    /**
     * Get a valid authentication token
     *
     * Delegates to GitHubAppAuth.getInstallationToken() which handles
     * caching and automatic refresh.
     *
     * @returns Promise resolving to the installation access token
     * @throws AuthenticationError if token cannot be obtained
     */
    getToken(): Promise<string>;
    /**
     * Clear the token cache
     *
     * Forces the next getToken() call to fetch a fresh token.
     */
    clearCache(): void;
    /**
     * Get cache information (for debugging)
     *
     * @returns Cache status or null if no cached token
     */
    getCacheInfo(): {
        expiresAt: Date;
        isValid: boolean;
    } | null;
}
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