cleanup relayer storage xdm keys for the relayer

domains/client/cross-domain-message-gossip/src/aux_schema.rs

@@ -1,5 +1,6 @@
 //! Schema for channel update storage.
 
+use crate::RELAYER_PREFIX;
 use parity_scale_codec::{Decode, Encode};
 use sc_client_api::backend::AuxStore;
 use sp_blockchain::{Error as ClientError, Info, Result as ClientResult};
@@ -88,6 +89,19 @@ where
             channel_detail.encode().as_slice(),
         )],
         vec![],
+    )?;
+
+    let channel_nonce = ChannelNonce {
+        relay_msg_nonce: Some(channel_detail.next_inbox_nonce),
+        relay_response_msg_nonce: channel_detail.latest_response_received_message_nonce,
+    };
+    let prefix = (RELAYER_PREFIX, src_chain_id).encode();
+    cleanup_chain_channel_storages(
+        backend,
+        &prefix,
+        src_chain_id,
+        channel_detail.channel_id,
+        channel_nonce,
     )
 }