Making a "rpg-like" looting chest

Hello , it's the first time i'm making a tutorial here (and on lua too) I was working on this for the last 2 day for my mod , an I didn't seen something similar for now So today i'll teach you how to make a chest you must open , and then you can obtain item or gold from it (or anything you want idc)

first off , you need to create you chest item in npc_item_custom.txt :

"item_chest"
    {
        // General
        //-------------------------------------------------------------------------------------------------------------
        "ID"                            "1282"                                                      // Here put a unused ID.
        "AbilityBehavior"               "DOTA_ABILITY_BEHAVIOR_CHANNELLED|DOTA_ABILITY_BEHAVIOR_NO_TARGET" // here we define it as a channeled item
        "BaseClass"                     "item_datadriven"
        "AbilityTextureName"            "item_present" //Here goes the texture name of the item
        "ItemShareability"              "ITEM_FULLY_SHAREABLE" // make everyone able to use it
        "Model"                         "models/props_winter/present.vmdl"
        "ItemKillable"                  "0" // the chest can't be destroyed when on ground
        "ItemSellable"                  "0" // can't be sold at a shop
        "ItemPurchasable"               "0" //can't be purchased
        "ItemDroppable"                 "1" // can be put on the ground (set it to 0 if you don't want allow the player to
        "ItemCost"                      "99999" 
        "ItemQuality"                   "artifact"
        "ItemDeclarations"              "DECLARE_PURCHASES_TO_TEAMMATES | DECLARE_PURCHASES_IN_SPEECH | DECLARE_PURCHASES_TO_SPECTATORS"
        "AbilityCooldown"               "1.0" //time before the player can open another chest
        "AbilityChannelTime"            "1.0" //time the player must channel to open the chest
        


        "OnChannelSucceeded"
        {
            "RunScript"
            {
                "ScriptFile"            "lua_datadriven/chest.lua" //create a folder named lua_item in "your_game_mode\scripts\vscripts" and create a text file called chest.lua
                "Function"              "chest_open" // here we call the function
                "chest_name"                "chest_1" // here you can give a name to this chest in case you want more than 1 chest type 
                "gold"              "1" // does this chest give gold or only item ? (0 = no gold , 1 = gold instead of item , 2 = gold + item)
                "gold_amt"              "1500" // how many gold the chest give if it give out
                "gold_rand"             "250" // if you want gold to be random

            }
        }
    }

then your script in lua_datadriven/chest.lua

function chest_open(keys)
    local item_list = LoadKeyValues("scripts/kv/chest_result.kv") --Here we load a kv file where we will put all the item you can find in chest
    local caster = keys.caster
    local Player_ID = caster:GetPlayerOwnerID() 
    local item = keys.ability
    local gold = 0
    if keys.gold >0 then
        gold = keys.gold_amt + math.random(-(keys.gold_rand),(keys.gold_rand))
    end
    caster:RemoveItem(item)--Here we remove the chest
    local chest_name = keys.chest_name

    item_list = item_list[chest_name] --he we load the item list specific to this chest
    --DeepPrintTable (item_list) --undo the commentary to check if your item_list is right
    local len = 0
    for k,v in pairs( item_list ) do
        len = len + 1
    end
    local item_number = 0
    if keys.gold == 1 then
        item_number = math.random(1,(len + 1)) --here we determine the item number (soo here we chose the item), the +1 is to add the gold chance in ,you can change it to 2 or more if you want gold to have higger change of appear
    else
        item_number = math.random(1,len)
    end
    if item_number > len then --in case the player obtaine gold instead of item
           PlayerResource:ModifyGold(Player_ID, gold, true, 0 ) 
    else
        local item_name = item_list[tostring(item_number)] -- i know it could be better , but i'm not realy used to kv
        local item_reward = CreateItem( item_name, caster, caster )
        caster:AddItem(item_reward)
        if keys.gold == 2 then
            PlayerResource:ModifyGold(Player_ID, gold, true, 0 ) 
        end
    end
end

and finaly we create our kv file where we put all the item for each chest "scripts/kv/chest_result.kv"

"put_the_name_you_wanna" 
{ 
    "chest_1"
    { 
        "1" "item_assault"
        "2" "item_desolator"
        "3" "item_sange_and_yasha"   
        "4" "item_butterfly"
    }
    "chest_2"
    { 
        "1" "item_youritem"
    }
}

Now you can easely make a chest for your rpg game :D If you want to make the chest loot on enemy death , look this another tutorial from Noya about an item drop system