Cauldrons now only accept fire as heat source

README.md

@@ -61,6 +61,7 @@ The following bugs of X-Decor (as of 01/07/2023) are fixed:
 * Fix boiling water in cauldrons not reliably cooling down
 * Fix boiling water sound not playing when rejoining
 * Fix cauldron with soup boiling forever
+* Fix cauldrons being heated up by fireflies
 * Fix rope and painting not compatible with itemframe
 * Fix itemframe, lever being offset when put into itemframe
 * Fix storage formspecs not closing if exploded

src/cooking.lua

@@ -27,10 +27,7 @@ local function is_heated(pos)
 	local below_node = {x = pos.x, y = pos.y - 1, z = pos.z}
 	local nn = minetest.get_node(below_node).name
 	-- Check fire group
-	if minetest.get_item_group(nn, "fire") == 1 then
-		return true
-	-- Hacky: If the string "fire" is in the node name
-	elseif nn:find("fire") then
+	if minetest.get_item_group(nn, "fire") ~= 0 then
 		return true
 	else
 		return false