diff --git a/src/chat_sdk/client.nim b/src/chat_sdk/client.nim
index 66ad952..26dbce1 100644
--- a/src/chat_sdk/client.nim
+++ b/src/chat_sdk/client.nim
@@ -12,7 +12,8 @@ import # Foreign
   std/sequtils,
   strformat,
   strutils,
-  tables
+  tables,
+  types
 
 import #local
   conversation_store,
@@ -37,8 +38,8 @@ logScope:
 type
   MessageCallback*[T] = proc(conversation: Conversation, msg: T): Future[void] {.async.}
   NewConvoCallback* = proc(conversation: Conversation): Future[void] {.async.}
-  ReadReceiptCallback* = proc(conversation: Conversation,
-      msgId: string): Future[void] {.async.}
+  DeliveryAckCallback* = proc(conversation: Conversation,
+      msgId: MessageId): Future[void] {.async.}
 
 
 type KeyEntry* = object
@@ -56,7 +57,7 @@ type Client* = ref object
 
   newMessageCallbacks: seq[MessageCallback[ContentFrame]]
   newConvoCallbacks: seq[NewConvoCallback]
-  readReceiptCallbacks: seq[ReadReceiptCallback]
+  deliveryAckCallbacks: seq[DeliveryAckCallback]
 
 #################################################
 # Constructors
@@ -136,12 +137,12 @@ proc notifyNewConversation(client: Client, convo: Conversation) =
   for cb in client.newConvoCallbacks:
     discard cb(convo)
 
-proc onReadReceipt*(client: Client, callback: ReadReceiptCallback) =
-  client.readReceiptCallbacks.add(callback)
+proc onDeliveryAck*(client: Client, callback: DeliveryAckCallback) =
+  client.deliveryAckCallbacks.add(callback)
 
-proc notifyReadReceipt(client: Client, convo: Conversation,
+proc notifyDeliveryAck(client: Client, convo: Conversation,
     messageId: MessageId) =
-  for cb in client.readReceiptCallbacks:
+  for cb in client.deliveryAckCallbacks:
     discard cb(convo, messageId)
 
 #################################################
@@ -213,7 +214,7 @@ proc newPrivateConversation*(client: Client,
   let deliveryAckCb = proc(
         conversation: Conversation,
       msgId: string): Future[void] {.async.} =
-    client.notifyReadReceipt(conversation, msgId)
+    client.notifyDeliveryAck(conversation, msgId)
 
   let convo = initPrivateV1(client.identity(), destPubkey, "default", deliveryAckCb)
   client.addConversation(convo)
diff --git a/src/chat_sdk/conversation_store.nim b/src/chat_sdk/conversation_store.nim
index 4eb7493..ce89a0a 100644
--- a/src/chat_sdk/conversation_store.nim
+++ b/src/chat_sdk/conversation_store.nim
@@ -17,5 +17,5 @@ type
 
     proc notifyNewMessage(self: Self, convo: Conversation,
         content: ContentFrame)
-    proc notifyReadReceipt(self: Self, convo: Conversation,
+    proc notifyDeliveryAck(self: Self, convo: Conversation,
         msgId: MessageId)
diff --git a/src/chat_sdk/inbox.nim b/src/chat_sdk/inbox.nim
index df1ca53..fe933dc 100644
--- a/src/chat_sdk/inbox.nim
+++ b/src/chat_sdk/inbox.nim
@@ -75,7 +75,7 @@ proc createPrivateV1FromInvite*[T: ConversationStore](client: T,
   let deliveryAckCb = proc(
         conversation: Conversation,
       msgId: string): Future[void] {.async.} =
-    client.notifyReadReceipt(conversation, msgId)
+    client.notifyDeliveryAck(conversation, msgId)
 
   let convo = initPrivateV1(client.identity(), destPubkey, "default", deliveryAckCb)
   notice "Creating PrivateV1 conversation", client = client.getId(),
diff --git a/src/nim_chat_poc.nim b/src/nim_chat_poc.nim
index a207e43..fdb299b 100644
--- a/src/nim_chat_poc.nim
+++ b/src/nim_chat_poc.nim
@@ -69,7 +69,7 @@ proc main() {.async.} =
         "https://waku.org/theme/image/logo-black.svg"))
     )
 
-  saro.onReadReceipt(proc(convo: Conversation, msgId: string) {.async.} =
+  saro.onDeliveryAck(proc(convo: Conversation, msgId: string) {.async.} =
     echo "    Saro -- Read Receipt for " & msgId
   )
 
@@ -86,7 +86,7 @@ proc main() {.async.} =
     echo "           ------>  Raya :: New Conversation: " & convo.id()
     await convo.sendMessage(raya.ds, initTextFrame("Hello").toContentFrame())
   )
-  raya.onReadReceipt(proc(convo: Conversation, msgId: string) {.async.} =
+  raya.onDeliveryAck(proc(convo: Conversation, msgId: string) {.async.} =
     echo "    raya -- Read Receipt for " & msgId
   )