utils: add validator functions

src/validators.ts

@@ -0,0 +1,12 @@
+import { isAddress } from 'ethers/lib/utils'
+
+export function isValidUrl(url?: string): boolean {
+  if (typeof url !== 'string') return false
+  const urlRegex = /(http|https):\/\/(\w+:{0,1}\w*@)?(\S+)(:[0-9]+)?(\/|\/([\w#!:.?+=&%@!\-/]))?/
+  return urlRegex.test(url)
+}
+
+export function isValidAddress(address?: string): boolean {
+  if (typeof address !== 'string') return false
+  return isAddress(address.toLowerCase())
+}