diff --git a/lib/ssb_bfe/encoder.ex b/lib/ssb_bfe/encoder.ex
index d5406d3..31f3910 100644
--- a/lib/ssb_bfe/encoder.ex
+++ b/lib/ssb_bfe/encoder.ex
@@ -2,10 +2,14 @@
 # - use the `where` conditional guard with e.g. `is_number` 
 
 defmodule SsbBfe.Encoder do
+  defp extract_base64_data(str) do
+    base64_data = String.slice(str, 1, 44)
+    Base.decode64(base64_data)
+  end
+
   def encode_blob(blob_id) do
     blob_tf_tag = SsbBfe.Types.get_blob_type(blob_id)
-    base64_data = String.slice(blob_id, 1, 44)
-    {:ok, decoded_base64_data} = Base.decode64(base64_data)
+    {:ok, decoded_base64_data} = extract_base64_data(blob_id)
     blob_tf_tag <> decoded_base64_data
   end
 
@@ -19,4 +23,16 @@ defmodule SsbBfe.Encoder do
     {:ok, decoded_base64_data} = Base.decode64(base64_data)
     box_tf_tag <> decoded_base64_data
   end
+
+  def encode_feed(feed_id) do
+    feed_tf_tag = SsbBfe.Types.get_feed_type(feed_id)
+    {:ok, decoded_base64_data} = extract_base64_data(feed_id)
+    feed_tf_tag <> decoded_base64_data
+  end
+
+  def encode_msg(msg_id) do
+    msg_tf_tag = SsbBfe.Types.get_msg_type(msg_id)
+    {:ok, decoded_base64_data} = extract_base64_data(msg_id)
+    msg_tf_tag <> decoded_base64_data
+  end
 end