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-rw-r--r--synapse/federation/pdu_codec.py21
1 files changed, 11 insertions, 10 deletions
diff --git a/synapse/federation/pdu_codec.py b/synapse/federation/pdu_codec.py
index e8180d94fd..991aae2a56 100644
--- a/synapse/federation/pdu_codec.py
+++ b/synapse/federation/pdu_codec.py
@@ -14,6 +14,9 @@
 # limitations under the License.
 
 from .units import Pdu
+from synapse.crypto.event_signing import (
+    add_event_pdu_content_hash, sign_event_pdu
+)
 
 import copy
 
@@ -33,6 +36,7 @@ def encode_event_id(pdu_id, origin):
 class PduCodec(object):
 
     def __init__(self, hs):
+        self.signing_key = hs.config.signing_key[0]
         self.server_name = hs.hostname
         self.event_factory = hs.get_event_factory()
         self.clock = hs.get_clock()
@@ -43,9 +47,7 @@ class PduCodec(object):
         kwargs["event_id"] = encode_event_id(pdu.pdu_id, pdu.origin)
         kwargs["room_id"] = pdu.context
         kwargs["etype"] = pdu.pdu_type
-        kwargs["prev_events"] = [
-            encode_event_id(p[0], p[1]) for p in pdu.prev_pdus
-        ]
+        kwargs["prev_pdus"] = pdu.prev_pdus
 
         if hasattr(pdu, "prev_state_id") and hasattr(pdu, "prev_state_origin"):
             kwargs["prev_state"] = encode_event_id(
@@ -76,11 +78,8 @@ class PduCodec(object):
         d["context"] = event.room_id
         d["pdu_type"] = event.type
 
-        if hasattr(event, "prev_events"):
-            d["prev_pdus"] = [
-                decode_event_id(e, self.server_name)
-                for e in event.prev_events
-            ]
+        if hasattr(event, "prev_pdus"):
+            d["prev_pdus"] = event.prev_pdus
 
         if hasattr(event, "prev_state"):
             d["prev_state_id"], d["prev_state_origin"] = (
@@ -93,10 +92,12 @@ class PduCodec(object):
         kwargs = copy.deepcopy(event.unrecognized_keys)
         kwargs.update({
             k: v for k, v in d.items()
-            if k not in ["event_id", "room_id", "type", "prev_events"]
+            if k not in ["event_id", "room_id", "type"]
         })
 
         if "origin_server_ts" not in kwargs:
             kwargs["origin_server_ts"] = int(self.clock.time_msec())
 
-        return Pdu(**kwargs)
+        pdu = Pdu(**kwargs)
+        pdu = add_event_pdu_content_hash(pdu)
+        return sign_event_pdu(pdu, self.server_name, self.signing_key)