diff --git a/Interface/AddOns/Wrath_Runes/Wrath_Runes.lua b/Interface/AddOns/Wrath_Runes/Wrath_Runes.lua
index 87b2146..ca13356 100644
--- a/Interface/AddOns/Wrath_Runes/Wrath_Runes.lua
+++ b/Interface/AddOns/Wrath_Runes/Wrath_Runes.lua
@@ -54,6 +54,28 @@ RUNE_CATEGORIES = {1, 2, 3, 4, 5};
 OWNED_CATEGORIES = {1, 3};
 SEARCH_FILTER = nil;
 ENGRAVING_ENABLED = true;
+EXCLUSIVE_CATEGORY_FILTER = nil;
+EQUIPPED_FILTER_ENABLED = false;
+RUNE_INFORMATION = {};
+EQUIPMENT_SLOT_ENGRAVINGS = {};
+INVENTORY_ENGRAVINGS = {};
+CATEGORY_ENGRAVINGS = {};
+CURRENT_RUNE_CAST = {};
+
+--[[ Not sure for this ]]--
+CONTAINER_SLOT_ENGRAVINGS = {
+    {true, true, true}, -- container 1 with all slots engravable
+    {true, false, true}, -- container 2 with second slot not engravable
+}
+
+EQUIPMENT_ENGRAVABLE_SLOTS = {
+    [1] = true,
+    [2] = false,
+    -- ...
+}
+
+
+--[[ Retro-ingenering of this : https://github.com/Gethe/wow-ui-source/blob/classic_era/Interface/AddOns/Blizzard_APIDocumentationGenerated/EngravingInfoDocumentation.lua ]]--
 
 function C_Engraving.IsEngravingEnabled()
     return ENGRAVING_ENABLED
@@ -96,78 +118,128 @@ end
 
 --[[ Method missing ]]--
 function C_Engraving.AddCategoryFilter(category)
+    CATEGORY_FILTERS[category] = true
 end
 
 function C_Engraving.AddExclusiveCategoryFilter(category)
+    EXCLUSIVE_CATEGORY_FILTER = category
 end
 
 function C_Engraving.CastRune(skillLineAbilityID)
+    -- idk for the moment
 end
 
 function C_Engraving.ClearAllCategoryFilters()
+    for category in pairs(CATEGORY_FILTERS) do
+        C_Engraving.ClearCategoryFilter(category)
+    end
 end
 
 function C_Engraving.ClearCategoryFilter(category)
+    CATEGORY_FILTERS[category] = nil
 end
 
 function C_Engraving.ClearExclusiveCategoryFilter()
+    EXCLUSIVE_CATEGORY_FILTER = nil
 end
 
 function C_Engraving.EnableEquippedFilter(enabled)
+    EQUIPPED_FILTER_ENABLED = enabled
 end
 
 function C_Engraving.GetCurrentRuneCast()
+    -- idk for the moment
 end
 
 function C_Engraving.GetEngravingModeEnabled()
+    -- idk for the moment
 end
 
 function C_Engraving.GetExclusiveCategoryFilter()
+    return EXCLUSIVE_CATEGORY_FILTER
 end
 
 function C_Engraving.GetNumRunesKnown(equipmentSlot)
+    if equipmentSlot == nil or RUNE_INFORMATION[equipmentSlot] == nil then
+        return 0, 0
+    end
+    return RUNE_INFORMATION[equipmentSlot].known, RUNE_INFORMATION[equipmentSlot].max
 end
 
 function C_Engraving.GetRuneForEquipmentSlot(equipmentSlot)
+    return EQUIPMENT_SLOT_ENGRAVINGS[equipmentSlot];
 end
 
 function C_Engraving.GetRuneForInventorySlot(containerIndex, slotIndex)
+    if INVENTORY_ENGRAVINGS[containerIndex] and INVENTORY_ENGRAVINGS[containerIndex][slotIndex] then
+        return INVENTORY_ENGRAVINGS[containerIndex][slotIndex]
+    else
+        return nil
+    end
 end
 
 function C_Engraving.GetRunesForCategory(category, ownedOnly)
+    local engravingInfoForCategory = CATEGORY_ENGRAVINGS[category];
+
+    if not engravingInfoForCategory then
+        return {};
+    end
+
+    if ownedOnly then
+        local ownedEngravingInfo = {};
+        for i, engravingData in ipairs(engravingInfoForCategory) do
+            if engravingData.owned then
+                table.insert(ownedEngravingInfo, engravingData);
+            end
+        end
+        return ownedEngravingInfo;
+    end
+
+    return engravingInfoForCategory;
 end
 
 function C_Engraving.IsEquipmentSlotEngravable(equipmentSlot)
+    return EQUIPMENT_ENGRAVABLE_SLOTS[equipmentSlot] or false;
 end
 
 function C_Engraving.IsEquippedFilterEnabled()
+    return EQUIPMENT_FILTER_ENABLED;
 end
 
 function C_Engraving.IsInventorySlotEngravable(containerIndex, slotIndex)
+    return CONTAINER_SLOT_ENGRAVINGS[containerIndex] and CONTAINER_SLOT_ENGRAVINGS[containerIndex][slotIndex] or false
 end
 
 function C_Engraving.IsInventorySlotEngravableByCurrentRuneCast(containerIndex, slotIndex)
+    return containerIndex == CURRENT_RUNE_CAST.containerIndex and slotIndex == CURRENT_RUNE_CAST.slotIndex
 end
 
 function C_Engraving.IsKnownRuneSpell(spellID)
+    return IsSpellKnown(spellID)
 end
 
 function C_Engraving.IsRuneEquipped(skillLineAbilityID)
+    -- idk for the moment
 end
 
 function C_Engraving.RefreshRunesList()
+    -- idk for the moment
 end
 
 function C_Engraving.SetEngravingModeEnabled(enabled)
+    -- idk for the moment
 end
 
 function  C_Engraving.EngravingModeChanged(enabled)
+    -- idk for the moment
 end
 
 function  C_Engraving.EngravingTargetingModeChanged(enabled)
+    -- idk for the moment
 end
 
 function  C_Engraving.RuneUpdated(rune)
+    -- idk for the moment
 end
 
 --[[ Not sure for this ]]--