import { Mailable } from '../Mailable.mjs';
import { MailerProvider } from '../MailerProvider.mjs';

/**
 * Configuration options for the FunctionProvider.
 */
type FunctionProviderConfig = {
    /** Default sender email address */
    default_from: string;
};
/**
 * Mailer provider that uses a custom function to send emails.
 * Useful for testing or custom email sending logic.
 */
declare class FunctionProvider implements MailerProvider {
    private func;
    private config;
    private defaultFrom;
    /**
     * Creates a new FunctionProvider instance.
     * @param func - Function to call for sending emails
     * @param config - Provider configuration options
     */
    constructor(func: Function, config: FunctionProviderConfig);
    /**
     * Sets the default sender email address.
     * @param from - The default sender email address
     */
    setDefaultFrom(from: string): void;
    /**
     * Sends an email by calling the configured function.
     * @param mail - The email message to send
     */
    sendMail(mail: Mailable): Promise<void>;
}

export { FunctionProvider, type FunctionProviderConfig };