diff --git a/node/libs/roles/src/proto/validator.proto b/node/libs/roles/src/proto/validator.proto
index f1ec2438..33c09ee9 100644
--- a/node/libs/roles/src/proto/validator.proto
+++ b/node/libs/roles/src/proto/validator.proto
@@ -144,11 +144,16 @@ message NetAddress {
   optional std.Timestamp timestamp = 3; // required
 }
 
+message L1BatchSignature {
+  optional bytes signature = 1; // required
+}
+
 message Msg {
   oneof t { // required
     ConsensusMsg consensus = 1;
     bytes session_id = 2;
     NetAddress net_address = 3;
+    L1BatchSignature l1_batch_signature = 4;
   }
 }
 
diff --git a/node/libs/roles/src/validator/conv.rs b/node/libs/roles/src/validator/conv.rs
index 04886834..f33ba58d 100644
--- a/node/libs/roles/src/validator/conv.rs
+++ b/node/libs/roles/src/validator/conv.rs
@@ -1,8 +1,9 @@
 use super::{
     AggregateSignature, BlockHeader, BlockHeaderHash, BlockNumber, CommitQC, ConsensusMsg,
-    FinalBlock, Fork, ForkNumber, Genesis, GenesisHash, LeaderCommit, LeaderPrepare, Msg, MsgHash,
-    NetAddress, Payload, PayloadHash, Phase, PrepareQC, ProtocolVersion, PublicKey, ReplicaCommit,
-    ReplicaPrepare, Signature, Signed, Signers, ValidatorSet, View, ViewNumber,
+    FinalBlock, Fork, ForkNumber, Genesis, GenesisHash, L1BatchSignature, LeaderCommit,
+    LeaderPrepare, Msg, MsgHash, NetAddress, Payload, PayloadHash, Phase, PrepareQC,
+    ProtocolVersion, PublicKey, ReplicaCommit, ReplicaPrepare, Signature, Signed, Signers,
+    ValidatorSet, View, ViewNumber,
 };
 use crate::{node::SessionId, proto::validator as proto};
 use anyhow::Context as _;
@@ -355,6 +356,20 @@ impl ProtoFmt for NetAddress {
     }
 }
 
+impl ProtoFmt for L1BatchSignature {
+    type Proto = proto::L1BatchSignature;
+
+    fn read(r: &Self::Proto) -> anyhow::Result<Self> {
+        Ok(Self(ByteFmt::decode(required(&r.signature)?)?))
+    }
+
+    fn build(&self) -> Self::Proto {
+        Self::Proto {
+            signature: Some(self.0.encode()),
+        }
+    }
+}
+
 impl ProtoFmt for Msg {
     type Proto = proto::Msg;
 
@@ -364,6 +379,9 @@ impl ProtoFmt for Msg {
             T::Consensus(r) => Self::Consensus(ProtoFmt::read(r).context("Consensus")?),
             T::SessionId(r) => Self::SessionId(SessionId(r.clone())),
             T::NetAddress(r) => Self::NetAddress(ProtoFmt::read(r).context("NetAddress")?),
+            T::L1BatchSignature(r) => {
+                Self::L1BatchSignature(ProtoFmt::read(r).context("L1BatchSignature")?)
+            }
         })
     }
 
@@ -374,6 +392,7 @@ impl ProtoFmt for Msg {
             Self::Consensus(x) => T::Consensus(x.build()),
             Self::SessionId(x) => T::SessionId(x.0.clone()),
             Self::NetAddress(x) => T::NetAddress(x.build()),
+            Self::L1BatchSignature(x) => T::L1BatchSignature(x.build()),
         };
 
         Self::Proto { t: Some(t) }