shop2

1 files changed, 9 insertions, 2 deletions

diff --git a/shop2/main.lua b/shop2/main.lua
index a79ab6f..8abe943 100644
--- a/shop2/main.lua
+++ b/shop2/main.lua
@@ -36,6 +36,14 @@ local function parsemeta(m)
 	return out
 end
 
+local function divisible(a,b)
+	-- returns whether a is divisible by b
+	-- because % doesn't work on nonintegers for some reason
+	if b == 0 then return false end
+	local x = a/b
+	return x == math.floor(x)
+end
+
 local function proctrans(tr)
 	if tr.to ~= our_addr then return end
 	if tr.type ~= "transfer" then return end
@@ -63,8 +71,7 @@ local function proctrans(tr)
 		return
 	end
 
-	local remainder = tr.value % idesc.price
-	if remainder ~= 0 then
+	if not divisible(tr.value,idesc.price) then
 		tell("i can only give you a whole number of items. make sure the amount you gave me is a multiple of "..idesc.price)
 		refund()
 	else