diff --git a/interactive.py b/interactive.py
old mode 100644
new mode 100755
index 7682290..7b1b19f
--- a/interactive.py
+++ b/interactive.py
@@ -1,12 +1,8 @@
 from telethon import sync, TelegramClient
+import tttcutils
 import os
 
-if not ("TTTC_API_ID" in os.environ or "TTTC_API_HASH" in os.environ):
-    print("Please set your environment variables \"TTTC_API_ID\" and \"TTTC_API_HASH\" accordingly.")
-    print("Please consult https://core.telegram.org/api/obtaining_api_id on how to get your own API id and hash.")
-    quit(1)
-api_id = os.environ["TTTC_API_ID"]
-api_hash = os.environ["TTTC_API_HASH"]
+api_id, api_hash = tttcutils.assert_environment()
 
 client = TelegramClient("tttc", api_id, api_hash)
 client.connect()
diff --git a/vimbindings.md b/vimbindings.md
deleted file mode 100644
index af1c23f..0000000
--- a/vimbindings.md
+++ /dev/null
@@ -1,60 +0,0 @@
-A a     append/append
-B b     back/BACK
-C c     change
-D d     delete
-E e     end/END
-F f     find/Find
-G g     go/GO
-H h     LEFT
-I i     INSERT
-J j     DOWN
-K k     UP
-L l     RIGHT
-M m     
-N n     
-O o     insert line
-P p     put
-Q q     quit
-R r     nReply, vReply/replace
-S s     
-T t     till
-U u     
-V v     visual mode
-        v - text visual
-        V - message visual
-        vV - text line visual
-W w     word
-X x     del
-Y y     yank
-Z z     
-0 $     goto 0 $
-?       help
-
-RETURN  send??
-
-^A
-^B
-^C      kill
-^D
-^E
-^F
-^G
-^H
-^I
-^J
-^K
-^L
-^M
-^N
-^O
-^P
-^Q
-^R
-^S
-^T
-^U
-^V
-^W
-^X
-^Y
-^Z