Update README.md

README.md

@@ -1,37 +1,70 @@
 # **API**
-
-## `currencies.register(currency)`
-Use this to register a currency, it is necessary in order to use every other function.
-
 <br>
 
-## `currencies.set(pl_name, currency, value)`
-Use this to set a player's balance.
+### `currencies.register(currency, def)`
+Use this to register a currency, it is necessary to use every other function.
+`def` is a table containing the following values (it isn't demanded): <br>
+```lua
+--[[
+{
+    min_value : number =
+        the smallest balance that a player can have.
 
-<br>
+    max_value : number =
+        the biggest balance that a player can have.
+    
+    negative_balance : bool =
+        if the balance can be less than 0.
+}
+]]
+```
 
-## `currencies.add(pl_name, currency, value)`
-Use this to increase a player's balance.
+<hr>
 
-<br>
-
-## `currencies.sub(pl_name, currency, value)`
-Use this to decrease a player's balance.
-
-<br>
-
-## `currencies.get(pl_name, currency)`
+### `currencies.get(currency, pl_name)`
 Use this to get a player's balance.
 
-<br><br>
+<hr>
+
+### `currencies.set(currency, pl_name, value)`
+Use this to set a player's balance.
+
+<hr>
+
+### `currencies.add(currency, pl_name, value)`
+Use this to increase a player's balance.
+
+<hr>
+
+### `currencies.sub(currency, pl_name, value)`
+Use this to decrease a player's balance.
+
+<hr>
+
+### `currencies.transfer(currency, from_pl_name, to_pl_name, amount)`
+Use this to subtract `amount` money `from_pl_name` and add them to `to_pl_name`.
+
+<hr>
+
+### `currencies.exchange(currency, from_pl_name, from_amount, to_pl_name, to_amount)`
+Use this to subtract `from_amount` from `from_pl_name` and add `to_amount` to `to_pl_name`.
+
+<hr>
+
+### `currencies.exists(currency)`
+Use this to check if a currency has been registered.
+
+<hr>
+
+<br><br><br>
 
 ## Example
 ```lua
-currencies.register("skywars_money")
+currencies.register("skywars_money", {min_value = 250})
 
-currencies.add("Giov4", "skywars_money", 300)
-currencies.sub("Giov4", "skywars_money", 100)
+currencies.add("skywars_money", "Giov4", 300)
+currencies.sub("skywars_money", "Giov4", 100)
 
-local balance = currencies.get("Giov4", "skywars_money")
-print(balance)  -- output: 200
+local balance = currencies.get("skywars_money", "Giov4")
+print(balance)  -- output: 250
 ```