diff --git a/lighthouse/state/helpers.rs b/lighthouse/state/common/delegation/block_hash.rs
similarity index 86%
rename from lighthouse/state/helpers.rs
rename to lighthouse/state/common/delegation/block_hash.rs
index 5ed03daf7..092709a21 100644
--- a/lighthouse/state/helpers.rs
+++ b/lighthouse/state/common/delegation/block_hash.rs
@@ -1,18 +1,9 @@
-/*
- * Collection of helper functions used in the state transition modules
- */
 use super::utils::errors::ParameterError;
 use super::utils::types::Hash256;
 
 /*
-   pub fn get_signed_parent_hashes(
-   active_state: &ActiveState,
-   block: &Block,
-   attestation: &AttestationRecord,
-   chain_config: &ChainConfig)
-   -> Vec<Hash256> {
-   }
-   */
+ * Work-in-progress function: not ready for review.
+ */
 
 pub fn get_block_hash(
     active_state_recent_block_hashes: &Vec<Hash256>,
diff --git a/lighthouse/state/common/delegation/mod.rs b/lighthouse/state/common/delegation/mod.rs
new file mode 100644
index 000000000..da9746f63
--- /dev/null
+++ b/lighthouse/state/common/delegation/mod.rs
@@ -0,0 +1,3 @@
+mod block_hash;
+
+use super::utils;
diff --git a/lighthouse/state/common/mod.rs b/lighthouse/state/common/mod.rs
index 96ff38eb9..76d294b23 100644
--- a/lighthouse/state/common/mod.rs
+++ b/lighthouse/state/common/mod.rs
@@ -1,7 +1,9 @@
+mod delegation;
 mod shuffling;
 
 pub mod maps;
 pub mod attestation_parent_hashes;
 
+use super::utils;
 use super::utils::types::Hash256;
 pub use self::shuffling::shuffle;
diff --git a/lighthouse/state/mod.rs b/lighthouse/state/mod.rs
index 10d9a1846..e533a52a9 100644
--- a/lighthouse/state/mod.rs
+++ b/lighthouse/state/mod.rs
@@ -14,7 +14,6 @@ pub mod block;
 pub mod crosslink_record;
 pub mod shard_and_committee;
 pub mod validator_record;
-pub mod helpers;
 
 use super::bls;
 use super::db;
diff --git a/lighthouse/sync/block.rs b/lighthouse/sync/block.rs
deleted file mode 100644
index e69de29bb..000000000