import { DynamicModule } from '@nestjs/common';
import { EmailLogOptions } from './interfaces';
/**
 * Email log module for Pino transport
 *
 * Follows CacheModule pattern:
 * - forRoot() and forRootAsync() static methods
 * - Global module decorator
 * - Async factory with dependency injection
 *
 * @example
 * ```typescript
 * // In service-registry.module.ts
 * if (process.env.EMAIL_LOG_ENABLED) {
 *   modules.push(
 *     EmailLogModule.forRootAsync({
 *       inject: [ApiConfigService],
 *       useFactory: (config: ApiConfigService) => ({
 *         enabled: true,
 *         to: config.getString('EMAIL_LOG_TO').split(','),
 *         from: config.getString('EMAIL_LOG_FROM'),
 *         smtpHost: config.getString('EMAIL_LOG_SMTP_HOST'),
 *         level: config.getString('EMAIL_LOG_LEVEL', 'error'),
 *       }),
 *     }),
 *   );
 * }
 * ```
 */
export declare class EmailLogModule {
    /**
     * Register email log module with options
     */
    static forRoot(options: EmailLogOptions): DynamicModule;
    /**
     * Register email log module asynchronously
     */
    static forRootAsync(asyncOptions: {
        inject?: any[];
        useFactory: ((...args: any[]) => Promise<EmailLogOptions>) | ((...args: any[]) => EmailLogOptions);
        isGlobal?: boolean;
    }): DynamicModule;
    /**
     * Create providers for the module
     */
    private static createProviders;
}