+ // Iterates over the keys of an object, if
+ // any exist, return false.
+ // eslint-disable-next-line no-unreachable-loop
+ for (const _ in obj) {
+ return false
+ }
+ return true
+}
+
+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]
+ }
+ }
+ return value
+ },
+ space
+ )
+}