import { RequiredConfig } from "./config";
type ObjectExpiration = "never" | "immediate" | "1h" | "1d" | "7d" | "30d" | "1y" | number;
type StorageACLDecision = "hide" | "forbid" | "allow";
export interface StorageACLRule {
    user: string;
    decision: StorageACLDecision;
}
export interface StorageACL {
    default?: StorageACLDecision;
    rules?: StorageACLRule[];
}
export declare const OBJECT_LIFECYCYLE_PREFERENCE_HEADER = "x-fal-object-lifecycle-preference";
/**
 * Configuration for object lifecycle and storage behavior.
 */
export interface StorageSettings {
    /**
     * The expiration time for the stored files (images, videos, etc.). You can specify one of the enumerated values or a number of seconds.
     */
    expiresIn?: ObjectExpiration;
    /**
     * Optional ACL configuration applied to the uploaded object.
     */
    initialAcl?: StorageACL;
}
/**
 * Converts an `StorageSettings` to the expiration duration in seconds.
 * @param lifecycle the lifecycle preference
 * @returns the expiration duration in seconds, or undefined if not applicable
 */
export declare function getExpirationDurationSeconds(lifecycle: StorageSettings): number | undefined;
/**
 * Builds the headers for the Object Lifecycle preference to be used in API requests.
 * This is used by the queue and run APIs to control the lifecycle of generated objects.
 *
 * @param lifecycle the lifecycle preference
 * @returns a record with the `X-Fal-Object-Lifecycle-Preference` header
 */
export declare function buildObjectLifecycleHeaders(lifecycle: StorageSettings | undefined): Record<string, string>;
/**
 * Options for uploading a file.
 */
export type UploadOptions = {
    /**
     * Custom lifecycle configuration for the uploaded file.
     * This object will be sent as the X-Fal-Object-Lifecycle header.
     */
    lifecycle?: StorageSettings;
};
/**
 * File support for the client. This interface establishes the contract for
 * uploading files to the server and transforming the input to replace file
 * objects with URLs.
 */
export interface StorageClient {
    /**
     * Upload a file to the server. Returns the URL of the uploaded file.
     * @param file the file to upload
     * @param options optional parameters, such as lifecycle configuration
     * @returns the URL of the uploaded file
     */
    upload: (file: Blob, options?: UploadOptions) => Promise<string>;
    /**
     * Transform the input to replace file objects with URLs. This is used
     * to transform the input before sending it to the server and ensures
     * that the server receives URLs instead of file objects.
     *
     * @param input the input to transform.
     * @returns the transformed input.
     */
    transformInput: (input: Record<string, any>) => Promise<Record<string, any>>;
}
type StorageClientDependencies = {
    config: RequiredConfig;
};
export declare function createStorageClient({ config, }: StorageClientDependencies): StorageClient;
export {};