/// <reference types="node" />
/**
 * A BlockBlobService instance is a convenience wrapper around the Azure Storage BlobServiceClient.
 */
export declare class BlockBlobService {
    private blobService;
    protected connectionString?: string;
    protected containerName?: string;
    /**
     * Creates an instance of the BlockBlobService class.
     * @param connectionString - Optional. The Azure Storage Account's Primary Connection String
     * @param containerName - Optional. The name of the container.
     */
    constructor(connectionString?: string, containerName?: string);
    /**
     * @description - Connects to blob storage
     * @param {string} connectionString - The Azure Storage Account's Primary Connection String
     * @returns {Promise<void>} - A promise that resolves when the connection is established.
     */
    connect(connectionString: string): Promise<void>;
    /**
     * @description - Writes a string, array, or JSON object to a blob as a string.
     * @param {string} blobName - The name of the blob.
     * @param {string | any[] | Object | Buffer } content - The content of the blob.
     * @param {string} containerName - The name of the container.
     */
    write(blobName: string, content: string | any[] | Object | Buffer, containerName?: string): Promise<void>;
    /**
     * @description - Returns the string content of a blob.
     * @param {string} blobName - The name of the blob.
     * @param {string} containerName - The name of the container.
     * @returns {Promise<string | any[] | Object>} - The content of the blob as a string, array, or object.
     */
    read(blobName: string, containerName?: string): Promise<string | any[] | Object>;
    /**
     * @description - Deletes a blob.
     * @param {string} blobName - The name of the blob.
     * @param {string} containerName - The name of the container.
     * @returns {Promise<void>} - A promise that resolves when the blob is deleted.
     */
    delete(blobName: string, containerName?: string): Promise<void>;
    /**
     * @description - Returns a boolean indicating whether the blob container exists.
     * @param {string} containerName - The name of the container.
     * @returns {boolean} - A promise that resolves with a boolean indicating whether the container exists.
     */
    checkIfContainerExists(containerName?: string): Promise<boolean>;
    /**
     * @description - Returns a boolean indicating whether the blob exists.
     * @param {string} blobName - The name of the blob.
     * @param {string} containerName - The name of the container.
     * @returns {Promise<boolean>} - A promise that resolves with a boolean indicating whether the blob exists.
     */
    checkIfBlobExists(blobName: string, containerName?: string): Promise<boolean>;
    /**
     * @description - Creates a blob container if one does not exist.
     * @param {string} containerName - The name of the container.
     * @returns {Promise<void>} - A promise that resolves when the container is created.
     */
    createContainer(containerName?: string): Promise<void>;
    /**
     * @description - Deletes a blob container.
     * @param {string} containerName - The name of the container.
     * @returns {Promise<void>} - A promise that resolves when the container is deleted.
     */
    deleteContainer(containerName?: string): Promise<void>;
    /**
     * @description - Returns a list of container names.
     * @returns {Promise<string[]>} - A promise that resolves with a list of container names.
     */
    listBlobContainers(): Promise<string[]>;
    /**
     * @description - Returns a list of blob names in a container.
     * @param {string} containerName - The name of the container.
     * @returns {Promise<string[]>} - A promise that resolves with a list of blob names.
     */
    listBlobs(containerName?: string): Promise<string[]>;
    /**
     * @description - Moves a file from one container to another.
     * @param {string} fileName - The name of the source blob.
     * @param {string} toContainer - The name of the container where the blob will be moved to.
     * @param {string} fromContainer - The name of the container where the blob will be moved from.
     */
    moveBlob(fileName: string, toContainer: string, fromContainer?: string): Promise<void>;
    /**
     * @description - throws an error if the container is undefined.
     * @param {any} val - The value to check.
     */
    private throwIfContainerIsUndefined;
}