diff --git a/proto/buffer.proto b/proto/buffer.proto
index 671b991..36c26ee 100644
--- a/proto/buffer.proto
+++ b/proto/buffer.proto
@@ -9,19 +9,22 @@ service Buffer {
 
 message RawOp {
 	string opseq = 1;
+	string user = 2;
 }
 
 message OperationRequest {
 	string path  = 1;
 	string hash  = 2;
 	string opseq = 3;
+	string user  = 4;
 }
 
 message BufferPayload {
-	string path = 2;
+	string path = 1;
+	string user = 2;
 	optional string content = 3;
 }
 
 message BufferResponse {
-	bool accepted = 3;
+	bool accepted = 1;
 }
diff --git a/src/client/cli/main.rs b/src/client/cli/main.rs
index 8bf722d..ad27332 100644
--- a/src/client/cli/main.rs
+++ b/src/client/cli/main.rs
@@ -1,5 +1,5 @@
 use clap::Parser;
-use library::proto::{buffer_client::BufferClient, BufferPayload};
+use codemp::proto::{buffer_client::BufferClient, BufferPayload};
 use tokio_stream::StreamExt;
 
 #[derive(Parser, Debug)]
diff --git a/src/server/buffer/actor.rs b/src/server/buffer/actor.rs
index d5b1d26..0b67c07 100644
--- a/src/server/buffer/actor.rs
+++ b/src/server/buffer/actor.rs
@@ -1,3 +1,4 @@
+use codemp::proto::{RawOp, OperationRequest};
 use tokio::sync::{mpsc, broadcast, watch};
 use tracing::error;
 use md5::Digest;
@@ -16,8 +17,8 @@ pub trait BufferStore<T> {
 
 #[derive(Clone)]
 pub struct BufferHandle {
-	pub edit: mpsc::Sender<OperationSeq>,
-	events: broadcast::Sender<OperationSeq>,
+	pub edit: mpsc::Sender<OperationRequest>,
+	events: broadcast::Sender<RawOp>,
 	pub digest: watch::Receiver<Digest>,
 }
 
@@ -47,7 +48,7 @@ impl BufferHandle {
 		}
 	}
 
-	pub fn subscribe(&self) -> broadcast::Receiver<OperationSeq> {
+	pub fn subscribe(&self) -> broadcast::Receiver<RawOp> {
 		self.events.subscribe()
 
 	}
@@ -55,8 +56,8 @@ impl BufferHandle {
 
 struct BufferWorker {
 	content: String,
-	edits: mpsc::Receiver<OperationSeq>,
-	events: broadcast::Sender<OperationSeq>,
+	edits: mpsc::Receiver<OperationRequest>,
+	events: broadcast::Sender<RawOp>,
 	digest: watch::Sender<Digest>,
 }
 
@@ -66,11 +67,16 @@ impl BufferWorker {
 			match self.edits.recv().await {
 				None => break,
 				Some(v) => {
-					match v.apply(&self.content) {
+					let op : OperationSeq = serde_json::from_str(&v.opseq).unwrap();
+					match op.apply(&self.content) {
 						Ok(res) => {
 							self.content = res;
 							self.digest.send(md5::compute(&self.content)).unwrap();
-							if let Err(e) = self.events.send(v) {
+							let msg = RawOp {
+								opseq: v.opseq,
+								user: v.user
+							};
+							if let Err(e) = self.events.send(msg) {
 								error!("could not broadcast OpSeq: {}", e);
 							}
 						},
diff --git a/src/server/buffer/service.rs b/src/server/buffer/service.rs
index 4e8e9cb..ba9adf9 100644
--- a/src/server/buffer/service.rs
+++ b/src/server/buffer/service.rs
@@ -1,12 +1,11 @@
 use std::{pin::Pin, sync::{Arc, RwLock}, collections::HashMap};
 
-use operational_transform::OperationSeq;
 use tokio::sync::mpsc;
 use tonic::{Request, Response, Status};
 
 use tokio_stream::{Stream, wrappers::ReceiverStream}; // TODO example used this?
 
-use library::proto::{buffer_server::{Buffer, BufferServer}, RawOp, BufferPayload, BufferResponse, OperationRequest};
+use codemp::proto::{buffer_server::{Buffer, BufferServer}, RawOp, BufferPayload, BufferResponse, OperationRequest};
 use tracing::info;
 
 use super::actor::{BufferHandle, BufferStore};
@@ -42,6 +41,7 @@ impl Buffer for BufferService {
 
 	async fn attach(&self, req: Request<BufferPayload>) -> Result<tonic::Response<OperationStream>, Status> {
 		let request = req.into_inner();
+		let myself = request.user;
 		match self.map.read().unwrap().get(&request.path) {
 			Some(handle) => {
 				let (tx, rx) = mpsc::channel(128);
@@ -50,8 +50,8 @@ impl Buffer for BufferService {
 					loop {
 						match sub.recv().await {
 							Ok(v) => {
-								let snd = RawOp { opseq: serde_json::to_string(&v).unwrap() };
-								tx.send(Ok(snd)).await.unwrap();
+								if v.user == myself { continue }
+								tx.send(Ok(v)).await.unwrap(); // TODO unnecessary channel?
 							}
 							Err(_e) => break,
 						}
@@ -69,16 +69,15 @@ impl Buffer for BufferService {
 		let request = req.into_inner();
 		let tx = match self.map.read().unwrap().get(&request.path) {
 			Some(handle) => {
-				if format!("{:x}", *handle.digest.borrow()) != request.hash {
-					return Ok(Response::new(BufferResponse { accepted : false } ));
-				}
+				// if format!("{:x}", *handle.digest.borrow()) != request.hash {
+				// 	return Ok(Response::new(BufferResponse { accepted : false } ));
+				// }
 				handle.edit.clone()
 			},
 			None => return Err(Status::not_found("path not found")),
 		};
-		let opseq : OperationSeq = serde_json::from_str(&request.opseq).unwrap();
-		tx.send(opseq).await.unwrap();
-		info!("sent edit to buffer");
+		info!("sending edit to buffer: {}", request.opseq);
+		tx.send(request).await.unwrap();
 		Ok(Response::new(BufferResponse { accepted: true }))
 	}