From a7756ea4b5acda2abf5c7b806fe5258d1b0c947f Mon Sep 17 00:00:00 2001
From: Paul Hauner <paul@paulhauner.com>
Date: Tue, 25 Dec 2018 18:22:46 +1100
Subject: [PATCH] Remove old chain state transition code

---
 beacon_chain/chain/src/lib.rs        |  2 --
 beacon_chain/chain/src/transition.rs | 29 ----------------------------
 2 files changed, 31 deletions(-)
 delete mode 100644 beacon_chain/chain/src/transition.rs

diff --git a/beacon_chain/chain/src/lib.rs b/beacon_chain/chain/src/lib.rs
index c98d58d3e..8eb076d47 100644
--- a/beacon_chain/chain/src/lib.rs
+++ b/beacon_chain/chain/src/lib.rs
@@ -1,7 +1,6 @@
 extern crate db;
 extern crate naive_fork_choice;
 extern crate ssz;
-extern crate state_transition;
 extern crate types;
 extern crate validator_induction;
 extern crate validator_shuffling;
@@ -10,7 +9,6 @@ mod block_processing;
 mod genesis;
 mod maps;
 mod stores;
-mod transition;
 
 use db::ClientDB;
 use crate::genesis::{genesis_states, Error as GenesisError};
diff --git a/beacon_chain/chain/src/transition.rs b/beacon_chain/chain/src/transition.rs
deleted file mode 100644
index 7598f2517..000000000
--- a/beacon_chain/chain/src/transition.rs
+++ /dev/null
@@ -1,29 +0,0 @@
-use super::BeaconChain;
-use db::ClientDB;
-use state_transition::{extend_active_state, StateTransitionError};
-use types::{ActiveState, BeaconBlock, CrystallizedState, Hash256};
-
-impl<T> BeaconChain<T>
-where
-    T: ClientDB + Sized,
-{
-    pub(crate) fn transition_states(
-        &self,
-        act_state: &ActiveState,
-        cry_state: &CrystallizedState,
-        block: &BeaconBlock,
-        block_hash: &Hash256,
-    ) -> Result<(ActiveState, Option<CrystallizedState>), StateTransitionError> {
-        let state_recalc_distance = block
-            .slot
-            .checked_sub(cry_state.last_state_recalculation_slot)
-            .ok_or(StateTransitionError::BlockSlotBeforeRecalcSlot)?;
-
-        if state_recalc_distance >= u64::from(self.config.cycle_length) {
-            panic!("Not implemented!")
-        } else {
-            let new_act_state = extend_active_state(act_state, block, block_hash)?;
-            Ok((new_act_state, None))
-        }
-    }
-}