- static isEmptyArray(object: any): boolean {
- if (!object) {
- return true;
- }
- if (Array.isArray(object) && object.length > 0) {
- return false;
- }
- return true;
- }
-
- static isEmptyObject(obj: any): boolean {
- return !Object.keys(obj).length;
- }
-
- static insertAt = (str: string, subStr: string, pos: number): string => `${str.slice(0, pos)}${subStr}${str.slice(pos)}`;
-
- /**
- * @param {number} [retryNumber=0]
- * @returns {number} delay in milliseconds
- */
- static exponentialDelay(retryNumber = 0): number {
- const delay = Math.pow(2, retryNumber) * 100;
- const randomSum = delay * 0.2 * Math.random(); // 0-20% of the delay
- return delay + randomSum;
- }
-
- /**
- * Convert websocket error code to human readable string message
- *
- * @param {number} code websocket error code
- * @returns {string} human readable string message
- */
- static getWebSocketCloseEventStatusString(code: number): string {
- if (code >= 0 && code <= 999) {
- return '(Unused)';
- } else if (code >= 1016) {
- if (code <= 1999) {
- return '(For WebSocket standard)';
- } else if (code <= 2999) {
- return '(For WebSocket extensions)';
- } else if (code <= 3999) {
- return '(For libraries and frameworks)';
- } else if (code <= 4999) {
- return '(For applications)';
+export const insertAt = (str: string, subStr: string, pos: number): string =>
+ `${str.slice(0, pos)}${subStr}${str.slice(pos)}`
+
+/**
+ * Computes the retry delay in milliseconds using an exponential backoff algorithm.
+ *
+ * @param retryNumber - the number of retries that have already been attempted
+ * @param delayFactor - the base delay factor in milliseconds
+ * @returns delay in milliseconds
+ */
+export const exponentialDelay = (retryNumber = 0, delayFactor = 100): number => {
+ const delay = Math.pow(2, retryNumber) * delayFactor
+ const randomSum = delay * 0.2 * secureRandom() // 0-20% of the delay
+ return delay + randomSum
+}
+
+/**
+ * Generates a cryptographically secure random number in the [0,1[ range
+ *
+ * @returns A number in the [0,1[ range
+ */
+export const secureRandom = (): number => {
+ return getRandomValues(new Uint32Array(1))[0] / 0x100000000
+}
+
+export const JSONStringifyWithMapSupport = (
+ obj: Record<string, unknown> | Array<Record<string, unknown>> | Map<unknown, unknown>,
+ space?: number
+): string => {
+ return JSON.stringify(
+ obj,
+ (_, value: Record<string, unknown>) => {
+ if (value instanceof Map) {
+ return {
+ dataType: 'Map',
+ value: [...value]
+ }