diff --git a/lib/feed-v1/index.js b/lib/feed-v1/index.js
index 760e783..fec0ec9 100644
--- a/lib/feed-v1/index.js
+++ b/lib/feed-v1/index.js
@@ -169,6 +169,7 @@ function create(opts) {
   if ((err = validateContent(msg))) throw err
 
   const privateKey = Buffer.from(opts.keys.private, 'base64')
+  // TODO: add a label prefix to the metadata before signing
   const metadataBuf = Buffer.from(stringify(msg.metadata), 'utf8')
   // TODO: when signing, what's the point of a customizable hmac?
   const sigBuf = ed25519.sign(privateKey, metadataBuf)
@@ -187,6 +188,7 @@ function fromPlaintextBuffer(plaintextBuf, msg) {
 }
 
 module.exports = {
+  getMsgHash,
   getMsgId,
   getFeedId,
   isFeedId,
@@ -198,7 +200,4 @@ module.exports = {
   validateOOO,
   validateBatch,
   validateOOOBatch,
-
-  // custom APIs:
-  getMsgHash,
 }