diff --git a/bashbot.sh b/bashbot.sh
index ef59191..25066f5 100755
--- a/bashbot.sh
+++ b/bashbot.sh
@@ -12,7 +12,7 @@
 # This file is public domain in the USA and all free countries.
 # Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
 #
-#### $$VERSION$$ v0.80-pre-4-gd1a3372
+#### $$VERSION$$ v0.80-pre-5-ge5f7b2d
 #
 # Exit Codes:
 # - 0 sucess (hopefully)
@@ -132,6 +132,20 @@ fi
 
 
 # internal functions
+# $1 URL, $2 filename in TMPDIR
+# outputs final filename
+download() {
+	local empty="no.file" file="${2:-${empty}}"
+	if [[ "$file" = *"/"* ]] || [[ "$file" = "."* ]]; then file="${empty}"; fi
+	while [ -f "${TMPDIR:-.}/${file}" ] ; do file="$RAMDOM-${file}"; done
+	getJson "$1" >"${TMPDIR:-.}/${file}" || return
+	printf '%s\n' "${TMPDIR:-.}/${file}"
+}
+
+# easy handling of users:
+_is_botadmin() {
+	user_is_botadmin "${USER[ID]}"
+}
 # $1 postfix, e.g. chatid
 # $2 prefix, back- or startbot-
 procname(){
diff --git a/doc/6_reference.md b/doc/6_reference.md
index 636f56c..63923b2 100644
--- a/doc/6_reference.md
+++ b/doc/6_reference.md
@@ -544,6 +544,20 @@ You must include  ```source modules/aliases.sh``` in 'commands.sh' to have the f
 
 ### Helper functions
 
+##### download
+Download the fiven URL ans returns the final filename in TMPDIR. If the given filename exists,the filename is prefixed with a
+random number. filename is not allowed to contain '/' or '..'.
+
+*usage:* download URL filename
+
+*example:* 
+```bash
+file="$(download "https://avatars.githubusercontent.com/u/13046303" "avatar.jpg")"
+echo "$file" -> ./data-bot-bash/avatar.jpg
+file="$(download "https://avatars.githubusercontent.com/u/13046303" "avatar.jpg")"
+echo "$file" -> ./data-bot-bash/12345-avatar.jpg
+```
+
 ##### _exists
 Returns true if the given function exist, can be used to check if a module is loaded.
 
@@ -629,5 +643,5 @@ The name of your bot is availible as bash variable "$ME", there is no need to ca
 #### [Prev Best Practice](5_practice.md)
 #### [Next Notes for Developers](7_develop.md)
 
-#### $$VERSION$$ v0.80-pre-0-gdd7c66d
+#### $$VERSION$$ v0.80-pre-5-ge5f7b2d
 
diff --git a/modules/aliases.sh b/modules/aliases.sh
index 859a447..1d18b43 100644
--- a/modules/aliases.sh
+++ b/modules/aliases.sh
@@ -5,14 +5,10 @@
 # This file is public domain in the USA and all free countries.
 # Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
 #
-#### $$VERSION$$ v0.80-pre-0-gdd7c66d
+#### $$VERSION$$ v0.80-pre-5-ge5f7b2d
 #
 # source from commands.sh to use the aliases
 
-# easy handling of users:
-_is_botadmin() {
-	user_is_botadmin "${USER[ID]}"
-}
 _is_admin() {
 	user_is_admin "${CHAT[ID]}" "${USER[ID]}"
 }