Add target_committee_size to ProtocolParameters

sdk/src/types/block/protocol.rs

@@ -78,6 +78,9 @@ pub struct ProtocolParameters {
     pub(crate) version_signaling: VersionSignalingParameters,
     /// Defines the parameters used for reward calculation.
     pub(crate) rewards_parameters: RewardsParameters,
+    /// Defines the target size of the committee. If there's fewer candidates the actual committee size could be
+    /// smaller in a given epoch.
+    pub(crate) target_committee_size: u8,
 }
 
 // This implementation is required to make [`ProtocolParameters`] a [`Packable`] visitor.
@@ -113,6 +116,7 @@ impl Default for ProtocolParameters {
             congestion_control_parameters: Default::default(),
             version_signaling: Default::default(),
             rewards_parameters: Default::default(),
+            target_committee_size: 32,
         }
     }
 }