import { type McpSignupAttribution } from "./mcp-signup-attribution.js";
export declare const MAGIC_LINK_ATTRIBUTION_PARAM = "signup_attribution";
export interface MagicLinkSignupAttribution {
    attribution?: Record<string, string>;
    anonymousId?: string;
    sessionId?: string;
    mcpSignupAttribution?: McpSignupAttribution;
}
/**
 * Sign the attribution captured when a magic link is requested. The token is
 * analytics context only; it never authorizes the user or changes the return
 * URL. The Better Auth secret keeps the callback from accepting forged data.
 */
export declare function encodeMagicLinkSignupAttribution(value: MagicLinkSignupAttribution, secret: string, now?: number): string | undefined;
export declare function decodeMagicLinkSignupAttribution(token: string | null | undefined, secret: string, now?: number): MagicLinkSignupAttribution | null | undefined;
export declare function readMagicLinkSignupAttribution(requestUrl: string | undefined, secret: string, now?: number): MagicLinkSignupAttribution | null | undefined;