Hello, I am attempting to make an http messaging api to simulate a mqtt-style subscribing and publishing rednet-like system. It seems to be working great so far with my current server, however, in the middle() function, I have a return statement (commented to make it easier to find) which is not actually returning any data to the function that calls it. Regular events seem to work fine, but when there is a endernet_receive event, it only returns nil. Also, variables are holding the correct values (checked with print statements), and send() doesn't appear to be defined either.

I am loading the API with os.loadAPI

PS.
If anyone has any interest in trying it out themselves, I will be releasing this in the near future and if it helps to identify the problem, I will give out the URL in DMs (for security reasons)

–EDIT–
Fixed middle() with tail calls (didn't see pinned post earlier), however, my send() function is still not being declared in the api's scope.

–EDIT 2–
I found the problem. I was declaring two send variables. I always seem to find the answer directly after asking for help. Thank you for your time.

Code:
Spoiler

--Define global api modifications to help later
function table.contains(table, element)
	for _, value in pairs(table) do
		if value == element then
			return true
		end
	end
	return false
end
--Define local variables
local subdTopics = {}
local baseUrl = "http://redacted.com/ccnet"
local send = "/send"
local query = "/query"
local dataToSend = "?message="
--Define functions
function send(topic,message) --Sends a message to a topic
	http.get(baseUrl..send..topic..dataToSend..textutils.urlEncode(message))
end
function subscribe(topic) --Subscribes to a topic
	table.insert(subdTopics,topic)
	http.request(baseUrl..query..topic)
end
function unsubscribe(topic) --Unsubscribes from a topic
	for k,v in pairs(subdTopics) do
		if v==topic then
			table.remove(subdTopics,k)
		end
	end
end
function receive() --Returns topic, message
	local event = {middle("endernet_receive")}
	return event[2],event[3]
end
function middle(eventName) --os.pullEvent = endernet.middle
	--Define variables that I'd prefer not to leak out but are evaluated later
	local event
	local topic
	local message
	--Yield should work, because if it's overwritten, the computer won't work
	event = {coroutine.yield()}
	if event[1]=="terminate" then
		error("Terminated")
	end
	--Parse the event
	if event[1]=="http_success" then
		topic = string.gsub(event[2],baseUrl..query,"")
		message = event[3].readAll()
		if table.contains(subdTopics,topic) then
			http.request(event[2])
		end
		if eventName==nil or eventName=="endernet_receive" then
			return "endernet_receive",topic,message --This is where the problem is. It does not return these variables
		else
			return middle(eventName)
		end
	elseif event[1]=="http_failure" then
		if table.contains(subdTopics,string.gsub(event[2],baseUrl..query,"")) then
			http.request(event[2])
		end
		return middle(eventName)
	else
		if eventName==nil or event[1]==eventName then
			return table.unpack(event)
		else
			return middle(eventName)
		end
	end
end