diff --git a/synapse/federation/replication.py b/synapse/federation/replication.py
index 1628a5629..89dbf3e2e 100644
--- a/synapse/federation/replication.py
+++ b/synapse/federation/replication.py
@@ -57,7 +57,7 @@ class ReplicationLayer(object):
         self.transport_layer.register_request_handler(self)
 
         self.store = hs.get_datastore()
-        self.pdu_actions = PduActions(self.store)
+        # self.pdu_actions = PduActions(self.store)
         self.transaction_actions = TransactionActions(self.store)
 
         self._transaction_queue = _TransactionQueue(
@@ -278,16 +278,16 @@ class ReplicationLayer(object):
     @defer.inlineCallbacks
     @log_function
     def on_context_pdus_request(self, context):
-        pdus = yield self.pdu_actions.get_all_pdus_from_context(
-            context
+        raise NotImplementedError(
+            "on_context_pdus_request is a security violation"
         )
-        defer.returnValue((200, self._transaction_from_pdus(pdus).get_dict()))
 
     @defer.inlineCallbacks
     @log_function
     def on_backfill_request(self, context, versions, limit):
-
-        pdus = yield self.pdu_actions.backfill(context, versions, limit)
+        pdus = yield self.handler.on_backfill_request(
+            context, versions, limit
+        )
 
         defer.returnValue((200, self._transaction_from_pdus(pdus).get_dict()))
 
@@ -383,20 +383,22 @@ class ReplicationLayer(object):
     @defer.inlineCallbacks
     @log_function
     def on_pull_request(self, origin, versions):
-        transaction_id = max([int(v) for v in versions])
+        raise NotImplementedError("Pull transacions not implemented")
 
-        response = yield self.pdu_actions.after_transaction(
-            transaction_id,
-            origin,
-            self.server_name
-        )
-
-        if not response:
-            response = []
-
-        defer.returnValue(
-            (200, self._transaction_from_pdus(response).get_dict())
-        )
+        # transaction_id = max([int(v) for v in versions])
+        #
+        # response = yield self.pdu_actions.after_transaction(
+        #     transaction_id,
+        #     origin,
+        #     self.server_name
+        # )
+        #
+        # if not response:
+        #     response = []
+        #
+        # defer.returnValue(
+        #     (200, self._transaction_from_pdus(response).get_dict())
+        # )
 
     @defer.inlineCallbacks
     def on_query_request(self, query_type, args):
@@ -498,8 +500,7 @@ class ReplicationLayer(object):
         state = None
 
         # Get missing pdus if necessary.
-        is_new = yield self.pdu_actions.is_new(pdu)
-        if is_new and not pdu.outlier:
+        if not pdu.outlier:
             # We only backfill backwards to the min depth.
             min_depth = yield self.store.get_min_depth_for_context(pdu.context)
 
@@ -539,7 +540,7 @@ class ReplicationLayer(object):
         else:
             ret = None
 
-        yield self.pdu_actions.mark_as_processed(pdu)
+        # yield self.pdu_actions.mark_as_processed(pdu)
 
         defer.returnValue(ret)
 
diff --git a/synapse/storage/transactions.py b/synapse/storage/transactions.py
index 908014d38..6624348fd 100644
--- a/synapse/storage/transactions.py
+++ b/synapse/storage/transactions.py
@@ -142,15 +142,15 @@ class TransactionStore(SQLBaseStore):
 
         # Update the tx id -> pdu id mapping
 
-        values = [
-            (transaction_id, destination, pdu[0], pdu[1])
-            for pdu in pdu_list
-        ]
-
-        logger.debug("Inserting: %s", repr(values))
-
-        query = TransactionsToPduTable.insert_statement()
-        txn.executemany(query, values)
+        # values = [
+        #     (transaction_id, destination, pdu[0], pdu[1])
+        #     for pdu in pdu_list
+        # ]
+        #
+        # logger.debug("Inserting: %s", repr(values))
+        #
+        # query = TransactionsToPduTable.insert_statement()
+        # txn.executemany(query, values)
 
         return prev_txns