diff --git a/.gitignore b/.gitignore
index 93d43a4..290eeec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,43 @@
-config.lua
\ No newline at end of file
+# Configuration files
+config.lua
+
+# Compiled Lua sources
+luac.out
+
+# luarocks build files
+*.src.rock
+*.zip
+*.tar.gz
+
+# Object files
+*.o
+*.os
+*.ko
+*.obj
+*.elf
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+*.def
+*.exp
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..b2c0ad4
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+  "Lua.diagnostics.disable": ["undefined-field", "deprecated", "lowercase-global"]
+}
diff --git a/data/config.lua.example b/data/config.lua.example
new file mode 100644
index 0000000..044b7a0
--- /dev/null
+++ b/data/config.lua.example
@@ -0,0 +1,4 @@
+return {
+  pkey = "",
+  name = ""
+}
diff --git a/data/products.lua b/data/products.lua
index c853586..57baee2 100644
--- a/data/products.lua
+++ b/data/products.lua
@@ -2,36 +2,38 @@
 	{
 		displayName = "Dirt",
 		description = "Has good quality.",
-		bimg = {{"‡€‹","   ","888"},{"‚","888","ccc"},{"‹€‡","c c"," c "}},
-		categorys={"Items"},
+		bimg = { { "‡€‹", "   ", "888" }, { "‚", "888", "ccc" }, { "‹€‡", "c c", " c " } },
+		categorys = { "Items" },
 		type = "item",
 		price = 2,
 		params = {
 			amount = 203,
 			id = "minecraft:dirt"
-		}
+		},
+		metaname = "dirt"
 	},
 	{
 		displayName = "Diamond",
 		description = "Only for a limited time!",
-		categorys={"Items","RARE"},
+		categorys = { "Items", "RARE" },
 		type = "item",
 		price = 14,
 		params = {
 			amount = 24,
 			id = "minecraft:diamond"
-		}
+		},
+		metaname = "dia"
 	},
 	{
 		displayName = "MiloX",
 		description = "Get access to a script!",
 		bimg = "script.bimg",
-		categorys={"Files"},
+		categorys = { "Files" },
 		type = "link",
 		price = 20,
 		params = {
 			link = "https://devbin.dev/8f3wy"
-		}
+		},
+		metaname = "milo"
 	}
 }
-
diff --git a/data/services.lua b/data/services.lua
deleted file mode 100644
index c207692..0000000
--- a/data/services.lua
+++ /dev/null
@@ -1,14 +0,0 @@
-return {
-	item = {
-		chests = {
-			{
-				first = "minecraft:chest_",
-				ids = {
-					193,
-					195,
-					"199->205"
-				}
-			}
-		}
-	}
-}
\ No newline at end of file
diff --git a/src/backend.lua b/src/backend.lua
index 7cf5259..310913d 100644
--- a/src/backend.lua
+++ b/src/backend.lua
@@ -1,12 +1,25 @@
-local kristly = require("libs.kristly")
+local kristly = require("/src/libs/kristly")
+local utils = require("/src/utils")
+print("Starting kristify")
 
-local name = "cats"
+local config = require("/data/config")
+local products = require("/data/products")
 
-local ws = kristly.websocket()
+if config.pkey == nil then
+  print("Config not found!")
+  return
+end
+
+if utils.endsWith(config.name, ".kst") then
+  print("The krist name in config should not inculdes `.kst`.")
+  return
+end
+
+local ws = kristly.websocket(config.pkey)
 
 local function startListening()
   ws:subscribe("transactions")
-  print("Subscribed")
+  print("Subscribed to transactions! :D")
 
   while true do
     local _, data = os.pullEvent("kristly")
@@ -19,8 +32,13 @@
       if data.event == "transaction" then
         local transaction = data.transaction
 
-        if transaction.sent_name == name and transaction.sent_metaname ~= nil then
-          print("Sent to: " .. transaction.sent_metaname .. "@" .. transaction.sent_name .. ".kst")
+        if transaction.sent_name == config.name and transaction.sent_metaname ~= nil then
+          print("Transaction to: " .. transaction.sent_metaname .. "@" .. transaction.sent_name .. ".kst")
+
+          handleTransaction(transaction)
+        elseif transaction.sent_name == config.name then
+          kristly.makeTransaction(config.pkey, transaction.from, transaction.value,
+            "message=Refunded. No metaname found")
         end
       end
 
@@ -30,6 +48,32 @@
   end
 end
 
+function handleTransaction(transaction)
+  if not utils.productsIncludes(products, transaction.sent_metaname) then
+    kristly.makeTransaction(config.pkey, transaction.from, transaction.value,
+      "message=Hey! The item `" .. transaction.sent_metaname .. "` is not avaiable.")
+    return
+  end
+
+  local product = utils.getProduct(products, transaction.sent_metaname)
+
+  if transaction.value < product.price then
+    kristly.makeTransaction(config.pkey, transaction.from, transaction.value,
+      "message=Insufficient amount of krist sent.")
+    return
+  end
+
+  local amount = math.floor(transaction.value / product.price)
+  local change = transaction.value - (amount * product.price)
+
+  if change ~= 0 then
+    kristly.makeTransaction(config.pkey, transaction.from, change,
+      "message=Here is your change! Thanks for using our shop.")
+  end
+
+  print("Dispensing " .. amount .. " item(s).")
+end
+
 local function startKristly()
   ws:start()
 end
diff --git a/src/utils.lua b/src/utils.lua
new file mode 100644
index 0000000..4739087
--- /dev/null
+++ b/src/utils.lua
@@ -0,0 +1,27 @@
+local utils = {}
+
+function utils.endsWith(str, ending)
+  return ending == "" or str:sub(- #ending) == ending
+end
+
+function utils.productsIncludes(products, metaname)
+  for _, product in ipairs(products) do
+    if product.metaname == metaname then
+      return true
+    end
+  end
+
+  return false
+end
+
+function utils.getProduct(products, metaname)
+  for _, product in ipairs(products) do
+    if product.metaname == metaname then
+      return product
+    end
+  end
+
+  return false
+end
+
+return utils