Added TODO to ServiceHub and CheckpointStorage

core/src/main/kotlin/core/node/ServiceHub.kt

@@ -12,6 +12,8 @@ import java.time.Clock
  * A service hub simply vends references to the other services a node has. Some of those services may be missing or
  * mocked out. This class is useful to pass to chunks of pluggable code that might have need of many different kinds of
  * functionality and you don't want to hard-code which types in the interface.
+ *
+ * TODO: Split into a public (to contracts etc) and private (to node) view
  */
 interface ServiceHub {
     val walletService: WalletService

core/src/main/kotlin/core/node/storage/CheckpointStorage.kt

@@ -6,6 +6,8 @@ import core.serialization.SerializedBytes
 
 /**
  * Thread-safe storage of fiber checkpoints.
+ *
+ * TODO: Make internal to node again once split [ServiceHub] into a public (to contracts etc) and private (to node) view
  */
 interface CheckpointStorage {