Eth <> Wei + ERC20 Formatting functions for Utils.cs (#10)

Author: 0xFirekeeper

Assets/Thirdweb/Scripts/Utils.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Text;
+using System.Numerics;
 using Newtonsoft.Json;
 
 namespace Thirdweb
@@ -10,6 +11,7 @@ public class Utils
 
         public const string AddressZero = "0x0000000000000000000000000000000000000000";
         public const string NativeTokenAddress = "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee";
+        public const double DECIMALS_18 = 1000000000000000000;
 
         public static string[] ToJsonStringArray(params object[] args)
         {
@@ -53,5 +55,33 @@ public static long UnixTimeNowMs()
             var timeSpan = (DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0));
             return (long)timeSpan.TotalMilliseconds;
         }
+
+        public static string ToWei(this string eth)
+        {
+            double ethDouble = 0;
+            if (!double.TryParse(eth, out ethDouble))
+                throw new ArgumentException("Invalid eth value.");
+            BigInteger wei = (BigInteger)(ethDouble * DECIMALS_18);
+            return wei.ToString();
+        }
+
+        public static string ToEth(this string wei, int decimalsToDisplay = 4)
+        {
+            return FormatERC20(wei, decimalsToDisplay);
+        }
+
+        public static string FormatERC20(this string wei, int decimalsToDisplay = 4, int decimals = 18)
+        {
+            BigInteger weiBigInt = 0;
+            if (!BigInteger.TryParse(wei, out weiBigInt))
+                throw new ArgumentException("Invalid wei value.");
+            double eth = (double)weiBigInt / Math.Pow(10.0, decimals);
+            string format = "#,0";
+            if (decimalsToDisplay > 0)
+                format += ".";
+            for (int i = 0; i < decimalsToDisplay; i++)
+                format += "#";
+            return eth.ToString(format);
+        }
     }
 }