/**
 * Supported cloud providers
 */
export declare enum CloudProvider {
    AWS = "aws",
    GCP = "gcp",
    AZURE = "azure",
    DIGITAL_OCEAN = "digital_ocean"
}
/**
 * AWS configuration
 */
export interface AwsConfig {
    accessKeyId: string;
    secretAccessKey: string;
    region: string;
    bucket: string;
    endpoint?: string;
    [key: string]: string | undefined;
}
/**
 * GCP configuration
 */
export interface GcpConfig {
    projectId: string;
    keyFilename: string;
    bucket: string;
    [key: string]: string | undefined;
}
/**
 * Azure configuration
 */
export interface AzureConfig {
    accountName: string;
    accountKey: string;
    connectionString: string;
    container: string;
    [key: string]: string | undefined;
}
/**
 * Digital Ocean configuration
 */
export interface DigitalOceanConfig {
    accessKeyId: string;
    secretAccessKey: string;
    region: string;
    bucket: string;
    endpoint: string;
    [key: string]: string | undefined;
}
/**
 * Global configuration
 */
export interface Config {
    provider: CloudProvider;
    region: string;
    expiration: number;
    aws?: AwsConfig;
    gcp?: GcpConfig;
    azure?: AzureConfig;
    digitalOcean?: DigitalOceanConfig;
}
/**
 * HTTP method for presigned URL
 */
export declare enum HttpMethod {
    GET = "GET",
    PUT = "PUT",
    POST = "POST",
    DELETE = "DELETE"
}
/**
 * Parameters for generating a presigned URL
 */
export interface PresignParams {
    /**
     * Prefix for the file path (folder in which file is stored)
     */
    prefix?: string;
    /**
     * Key/path of the file in the storage
     */
    key: string;
    /**
     * flag for keeping the file public
     */
    isPublic?: boolean;
    /**
     * HTTP method for the presigned URL
     * GET for download, PUT for upload
     */
    method?: HttpMethod;
    /**
     * Content type of the file (for upload)
     */
    contentType?: string;
    /**
     * File size in bytes (for upload)
     */
    contentLength?: number;
    /**
     * Additional metadata for the file
     */
    metadata?: Record<string, string>;
}
/**
 * Additional options for presigned URL
 */
export interface PresignOptions {
    /**
     * Expiration time in seconds
     * Overrides the global expiration setting
     */
    expiration?: number;
    /**
     * Provider-specific options
     */
    [key: string]: any;
}
/**
 * Response from generating a presigned URL
 */
export interface PresignResponse {
    /**
     * Key/name of the file in the storage
     */
    key: string;
    /**
     * The generated presigned URL
     */
    presignedUrl: string;
    /**
     * The URL to access the file
     */
    url?: string;
    /**
     * The HTTP method to use with the URL
     */
    method: HttpMethod;
    /**
     * When the URL expires (ISO string)
     */
    expiresAt: string;
    /**
     * Additional fields to include in the request (for POST uploads)
     */
    fields?: Record<string, string>;
    /**
     * Headers to include in the request
     */
    headers: Record<string, string>;
}
/**
 * Provider interface
 */
export interface Provider {
    generatePresignedUrl(params: PresignParams, options?: PresignOptions): Promise<PresignResponse>;
    makeFilePublic(key?: string): Promise<void>;
}