export type SDBMAcceptDataType = string | Uint8Array;
export type SDBMBitsSize = 32 | 64;
export type SDBMInterpretMode = "bytes" | "unicode-code-points" | "utf16-code-units";
export interface SDBMOptions {
    /**
     * Data interpret mode of the SDBM.
     *
     * - **`bytes`:** UTF-8 encoded bytes.
     * - **`unicode-code-points`:**: Unicode code points.
     * - **`utf16-code-units`:** UTF-16 code units; Used in the previous versions.
     * @default {"byte"}
     */
    interpret?: SDBMInterpretMode;
    /**
     * Bits size of the SDBM.
     * @default {32}
     */
    size?: SDBMBitsSize;
}
/**
 * Get the non-cryptographic hash of the data with algorithm SDBM.
 */
export declare class SDBM {
    #private;
    get [Symbol.toStringTag](): string;
    /**
     * Initialize.
     * @param {SDBMOptions} [options={}] Options.
     */
    constructor(options?: SDBMOptions);
    /**
     * Whether the instance is freezed.
     * @returns {boolean}
     */
    get freezed(): boolean;
    /**
     * Clone the instance.
     * @returns {SDBM}
     */
    clone(): SDBM;
    /**
     * Freeze the instance to prevent any further update.
     * @returns {this}
     */
    freeze(): this;
    /**
     * Get the non-cryptographic hash of the data, in Uint8Array.
     * @returns {Uint8Array}
     */
    hash(): Uint8Array;
    /**
     * Get the non-cryptographic hash of the data, in hexadecimal with padding.
     * @returns {string}
     */
    hashHex(): string;
    /**
     * Append data.
     * @param {SDBMAcceptDataType} data Data.
     * @returns {this}
     */
    update(data: SDBMAcceptDataType): this;
    /**
     * Append data from the readable stream.
     * @param {ReadableStream<SDBMAcceptDataType>} stream Data from the readable stream.
     * @returns {Promise<this>}
     */
    updateFromStream(stream: ReadableStream<SDBMAcceptDataType>): Promise<this>;
}
export default SDBM;