Improve token management logic

src/apiutils.nim

@@ -53,10 +53,8 @@ proc fetch*(url: Uri; oldApi=false): Future[JsonNode] {.async.} =
       result = newJNull()
 
     if not oldApi and resp.headers.hasKey(rl & "reset"):
-      let time = fromUnix(parseInt(resp.headers[rl & "reset"]))
-      if token.reset != time:
-        token.remaining = parseInt(resp.headers[rl & "limit"])
-      token.reset = time
+      token.remaining = parseInt(resp.headers[rl & "remaining"])
+      token.reset = fromUnix(parseInt(resp.headers[rl & "reset"]))
 
     if result.getError notin {invalidToken, forbidden, badToken}:
       token.lastUse = getTime()

src/tokens.nim

@@ -57,7 +57,7 @@ template expired(token: Token): untyped =
     token.lastUse < time - maxLastUse
 
 template isLimited(token: Token): untyped =
-  token == nil or (token.remaining <= 1 and token.reset > getTime()) or
+  token == nil or (token.remaining <= 5 and token.reset > getTime()) or
     token.expired
 
 proc release*(token: Token; invalid=false) =
@@ -79,8 +79,6 @@ proc getToken*(): Future[Token] {.async.} =
   if result == nil:
     raise rateLimitError()
 
-  dec result.remaining
-
 proc poolTokens*(amount: int) {.async.} =
   var futs: seq[Future[Token]]
   for i in 0 ..< amount: