/**
 * @summary Add a custom datatype to EJSON.
 * @locus Anywhere
 * @param {String} name A tag for your custom type; must be unique among
 *                      custom data types defined in your project, and must
 *                      match the result of your type's `typeName` method.
 * @param {Function} factory A function that deserializes a JSON-compatible
 *                           value into an instance of your type.  This should
 *                           match the serialization performed by your
 *                           type's `toJSONValue` method.
 */
export declare function addType(name: any, factory: any): void;
export declare function _isCustomType(obj: any): boolean;
export declare function _getTypes(isOriginal?: boolean): unknown;
export declare function _getConverters(): any;
export declare function _adjustTypesToJSONValue(obj: any): any;
/**
 * @summary Serialize an EJSON-compatible value into its plain JSON
 *          representation.
 * @locus Anywhere
 * @param {EJSON} val A value to serialize to plain JSON.
 */
export declare function toJSONValue(item: any): any;
export declare function _adjustTypesFromJSONValue(obj: any): any;
/**
 * @summary Deserialize an EJSON value from its plain JSON representation.
 * @locus Anywhere
 * @param {JSONCompatible} val A value to deserialize into EJSON.
 */
export declare function fromJSONValue(item: any): any;
/**
 * @summary Serialize a value to a string. For EJSON values, the serialization
 *          fully represents the value. For non-EJSON values, serializes the
 *          same way as `JSON.stringify`.
 * @locus Anywhere
 * @param {EJSON} val A value to stringify.
 * @param {Object} [options]
 * @param {Boolean | Integer | String} options.indent Indents objects and
 * arrays for easy readability.  When `true`, indents by 2 spaces; when an
 * integer, indents by that number of spaces; and when a string, uses the
 * string as the indentation pattern.
 * @param {Boolean} options.canonical When `true`, stringifies keys in an
 *                                    object in sorted order.
 */
export declare function stringify(val: any, opts?: {
    canonical?: boolean;
    indent?: boolean | number | string;
}): string;
/**
 * @summary Parse a string into an EJSON value. Throws an error if the string
 *          is not valid EJSON.
 * @locus Anywhere
 * @param {String} str A string to parse into an EJSON value.
 */
export declare function parse(item: any): any;
/**
 * @summary Returns true if `x` is a buffer of binary data, as returned from
 *          [`EJSON.newBinary`](#ejson_new_binary).
 * @param {Object} x The variable to check.
 * @locus Anywhere
 */
export declare function isBinary(obj: any): obj is Uint8Array;
/**
 * @summary Return true if `a` and `b` are equal to each other.  Return false
 *          otherwise.  Uses the `equals` method on `a` if present, otherwise
 *          performs a deep comparison.
 * @locus Anywhere
 * @param {EJSON} a
 * @param {EJSON} b
 * @param {Object} [options]
 * @param {Boolean} options.keyOrderSensitive Compare in key sensitive order,
 * if supported by the JavaScript implementation.  For example, `{a: 1, b: 2}`
 * is equal to `{b: 2, a: 1}` only when `keyOrderSensitive` is `false`.  The
 * default is `false`.
 */
export declare function equals(a: any, b: any, options?: any): any;
/**
 * @summary Return a deep copy of `val`.
 * @locus Anywhere
 * @param {EJSON} val A value to copy.
 */
export declare function clone<T>(v: T): T;