import type { SessionStorage } from '@remix-run/server-runtime';
import type { AuthenticateOptions, StrategyVerifyCallback } from 'remix-auth';
import { Strategy } from 'remix-auth';
export type SendEmailOptions<User> = {
    emailAddress: string;
    magicLink: string;
    user?: User | null;
    domainUrl: string;
    form: FormData;
};
export type SendEmailFunction<User> = {
    (options: SendEmailOptions<User>): Promise<void>;
};
/**
 * Validate the email address the user is trying to use to login.
 * This can be useful to ensure it's not a disposable email address.
 * @param emailAddress The email address to validate
 */
export type VerifyEmailFunction = {
    (email: string): Promise<void>;
};
/**
 * The content of the magic link payload. Keys are minified so that the resulting link is as short as possible.
 */
export type MagicLinkPayload = {
    /**
     * Email address used to authenticate.
     */
    e: string;
    /**
     * Form data received in the request.
     */
    f?: Record<string, unknown>;
    /**
     * Creation date of the magic link, as an ISO string. This is used to check
     * the email link is still valid.
     */
    c: number;
};
/**
 * This interface declares what configuration the strategy needs from the
 * developer to correctly work.
 */
export type EmailLinkStrategyOptions<User> = {
    /**
     * The endpoint the user will go after clicking on the email link.
     * A whole URL is not required, the pathname is enough, the strategy will
     * detect the host of the request and use it to build the URL.
     * @default "/magic"
     */
    callbackURL?: string;
    /**
     * A function to send the email. This function should receive the email
     * address of the user and the URL to redirect to and should return a Promise.
     * The value of the Promise will be ignored.
     */
    sendEmail: SendEmailFunction<User>;
    /**
     * A function to validate the email address. This function should receive the
     * email address as a string and return a Promise. The value of the Promise
     * will be ignored, in case of error throw an error.
     *
     * By default it only test the email against the RegExp `/.+@.+/`.
     */
    verifyEmailAddress?: VerifyEmailFunction;
    /**
     * A secret string used to encrypt and decrypt the token and magic link.
     */
    secret: string;
    /**
     * The name of the form input used to get the email.
     * @default "email"
     */
    emailField?: string;
    /**
     * The param name the strategy will use to read the token from the email link.
     * @default "token"
     */
    magicLinkSearchParam?: string;
    /**
     * How long the magic link will be valid. Default to 30 minutes.
     * @default 1_800_000
     */
    linkExpirationTime?: number;
    /**
     * The key on the session to store any error message.
     * @default "auth:error"
     */
    sessionErrorKey?: string;
    /**
     * The key on the session to store the magic link.
     * @default "auth:magiclink"
     */
    sessionMagicLinkKey?: string;
    /**
     * Add an extra layer of protection and validate the magic link is valid.
     * @default false
     */
    validateSessionMagicLink?: boolean;
    /**
     * The key on the session to store the email.
     * It's unset the same time the sessionMagicLinkKey is.
     * @default "auth:email"
     */
    sessionEmailKey?: string;
};
/**
 * This interface declares what the developer will receive from the strategy
 * to verify the user identity in their system.
 */
export type EmailLinkStrategyVerifyParams = {
    email: string;
    form: FormData;
    /**
     * True, if the verify callback is called after clicking on the magic link
     */
    magicLinkVerify: boolean;
};
export declare class EmailLinkStrategy<User> extends Strategy<User, EmailLinkStrategyVerifyParams> {
    name: string;
    private readonly emailField;
    private readonly callbackURL;
    private readonly sendEmail;
    private readonly validateEmail;
    private readonly secret;
    private readonly magicLinkSearchParam;
    private readonly linkExpirationTime;
    private readonly sessionErrorKey;
    private readonly sessionMagicLinkKey;
    private readonly validateSessionMagicLink;
    private readonly sessionEmailKey;
    constructor(options: EmailLinkStrategyOptions<User>, verify: StrategyVerifyCallback<User, EmailLinkStrategyVerifyParams>);
    authenticate(request: Request, sessionStorage: SessionStorage, options: AuthenticateOptions): Promise<User>;
    getMagicLink(emailAddress: string, domainUrl: string, form: FormData): Promise<string>;
    private getDomainURL;
    private sendToken;
    private createFormPayload;
    private createMagicLinkPayload;
    private encrypt;
    private decrypt;
    private getMagicLinkCode;
    private validateMagicLink;
}