export declare const MCP_SIGNUP_ATTRIBUTION_COOKIE_NAME = "an_mcp_signup";
export declare const MCP_SIGNUP_ATTRIBUTION_TTL_SECONDS: number;
export interface McpSignupAttribution {
    signupOrigin?: "mcp_oauth";
    /** Legacy signed-cookie field; interpreted only as an unverified hint. */
    vendor?: string;
    vendorHint?: string;
    anonymousId?: string;
    sessionId?: string;
    firstTouchPathAllowed?: boolean;
}
export declare function applyMcpSignupAttribution(attribution: Record<string, string | undefined> | undefined, mcpSignup: McpSignupAttribution | null | undefined): Record<string, string | undefined> | undefined;
export declare function sanitizeMcpSignupAttribution(value: unknown): McpSignupAttribution | undefined;
export declare function encodeMcpSignupAttribution(value: McpSignupAttribution, secret: string, now?: number): string | undefined;
export declare function decodeMcpSignupAttribution(token: string | null | undefined, secret: string, now?: number): McpSignupAttribution | null | undefined;
export declare function readMcpSignupAttributionFromCookieHeader(cookieHeader: string | null | undefined, secret: string, now?: number): McpSignupAttribution | null | undefined;
export declare function hasMcpSignupAttributionCookie(cookieHeader: string | null | undefined): boolean;
export declare function readMcpSignupContextFromCookieHeader(cookieHeader: string | null | undefined, secret: string, now?: number): McpSignupAttribution | null | undefined;
export declare function filterMcpSignupAttributionByConsent(context: McpSignupAttribution | null | undefined, cookieHeader: string | null | undefined, requestConsent?: {
    performance?: boolean;
    targeting?: boolean;
}): McpSignupAttribution | null | undefined;
export declare function serializeMcpSignupAttributionCookie(attribution: McpSignupAttribution, secret: string, secure: boolean, now?: number): string | undefined;