Implement money utility APIs

Part of #6

AriasServerUtils/Globals.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Runtime.ConstrainedExecution;
+using Vintagestory.API.Common;
 using Vintagestory.API.Server;
 
 namespace AriasServerUtils
@@ -114,10 +115,39 @@ namespace AriasServerUtils
         public Dictionary<string, Warp> warps = new Dictionary<string, Warp>();
     }
 
+    /// <summary>
+    /// This contains per command costs, as well as helper functions that can refund a player, or check if the player has the required balance, or payment
+    /// 
+    /// </summary>
     [Serializable]
     public class Costs
     {
+        public Dictionary<string, int> costs = new Dictionary<string, int>();
 
+        /// <summary>
+        /// Checks if the player has the balance required to use the command
+        /// </summary>
+        /// <param name="cmd">The command the player is trying to use</param>
+        /// <param name="player">The player</param>
+        /// <returns>True if the player has the required balance</returns>
+        public bool PlayerHasBalance(string cmd, EntityPlayer player)
+        {
+            int gears = 0;
+            int required = 0;
+            if (costs.ContainsKey(cmd))
+            {
+                // Get the cost for that command
+                required = costs[cmd];
+            }
+
+            // Scan the player inventory, check gears
+
+
+
+
+            if (gears >= required) return true;
+            return false;
+        }
     }