import * as z from 'zod/v4/core';
import type { APIContext } from '../../types/public/index.js';
import { deserializeActionResult } from './client.js';
import type { ActionAccept, ActionClient, ActionHandler, SafeResult, SerializedActionResult } from './types.js';
export declare function defineAction<TOutput, TAccept extends ActionAccept | undefined = undefined, TInputSchema extends z.$ZodType | undefined = TAccept extends 'form' ? z.$ZodType<FormData> : undefined>({ accept, input: inputSchema, handler, }: {
    input?: TInputSchema;
    accept?: TAccept;
    handler: ActionHandler<TInputSchema, TOutput>;
}): ActionClient<TOutput, TAccept, TInputSchema> & string;
interface AstroActionContext {
    /** Information about an incoming action request. */
    action?: {
        /** Whether an action was called using an RPC function or by using an HTML form action. */
        calledFrom: 'rpc' | 'form';
        /** The name of the action. Useful to track the source of an action result during a redirect. */
        name: string;
        /** Programmatically call the action to get the result. */
        handler: () => Promise<SafeResult<any, any>>;
    };
    /**
     * Manually set the action result accessed via `getActionResult()`.
     * Calling this function from middleware will disable Astro's own action result handling.
     */
    setActionResult(actionName: string, actionResult: SerializedActionResult): void;
    /**
     * Serialize an action result to stored in a cookie or session.
     * Also used to pass a result to Astro templates via `setActionResult()`.
     */
    serializeActionResult: typeof serializeActionResult;
    /**
     * Deserialize an action result to access data and error objects.
     */
    deserializeActionResult: typeof deserializeActionResult;
}
/**
 * Access information about Action requests from middleware.
 */
export declare function getActionContext(context: APIContext): AstroActionContext;
export declare const ACTION_API_CONTEXT_SYMBOL: unique symbol;
/** Transform form data to an object based on a Zod schema. */
export declare function formDataToObject<T extends z.$ZodObject>(formData: FormData, schema: T, 
/** @internal */
prefix?: string): Record<string, unknown>;
export declare function serializeActionResult(res: SafeResult<any, any>): SerializedActionResult;
export {};