Remove serai from the cosign evaluator

common/db/src/create_db.rs

@@ -143,6 +143,19 @@ macro_rules! db_channel {
 
           Self::set(txn, $($arg,)* index_to_use, value);
         }
+        pub(crate) fn peek(
+          txn: &mut impl DbTxn
+          $(, $arg: $arg_type)*
+        ) -> Option<$field_type> {
+          let messages_recvd_key = Self::key($($arg,)* 1);
+          let messages_recvd = txn.get(&messages_recvd_key).map(|counter| {
+            u32::from_le_bytes(counter.try_into().unwrap())
+          }).unwrap_or(0);
+
+          let index_to_read = messages_recvd + 2;
+
+          Self::get(txn, $($arg,)* index_to_read)
+        }
         pub(crate) fn try_recv(
           txn: &mut impl DbTxn
           $(, $arg: $arg_type)*