From 64f1d93cc31985605c8cc64484826411e81af6a9 Mon Sep 17 00:00:00 2001
From: Anatoly Yakovenko <aeyakovenko@gmail.com>
Date: Sat, 16 Feb 2019 21:35:20 -0800
Subject: [PATCH] Use the accounts list from parents up to finalized bank for
 Account::load apis.

Borrow checker

query the previous parents accounts

cleanup!

s/tree/parents

Tests!  Last_ids need to be inherited as well otherwise nothing works.

new_from_parent
---
 src/bank.rs     | 10 ----------
 src/fullnode.rs |  5 +++--
 2 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/src/bank.rs b/src/bank.rs
index af41abac5d..e203521ab0 100644
--- a/src/bank.rs
+++ b/src/bank.rs
@@ -134,16 +134,6 @@ impl Bank {
         *sub = Some(subscriptions)
     }
 
-    pub fn copy_for_tpu(&self) -> Self {
-        Self {
-            accounts: self.accounts.copy_for_tpu(),
-            status_cache: RwLock::new(self.status_cache.read().unwrap().clone()),
-            last_id_queue: RwLock::new(self.last_id_queue.read().unwrap().clone()),
-            subscriptions: RwLock::new(None),
-            parent: self.parent.clone(),
-        }
-    }
-
     pub fn process_genesis_block(&self, genesis_block: &GenesisBlock) {
         assert!(genesis_block.mint_id != Pubkey::default());
         assert!(genesis_block.bootstrap_leader_id != Pubkey::default());
diff --git a/src/fullnode.rs b/src/fullnode.rs
index c4a2df72b3..1a87cda80a 100644
--- a/src/fullnode.rs
+++ b/src/fullnode.rs
@@ -363,9 +363,10 @@ impl Fullnode {
                 }
                 None => FullnodeReturnType::LeaderToLeaderRotation, // value doesn't matter here...
             };
-
+            let mut new: Arc<Bank> = Arc::new(Bank::new_from_parent(self.bank.clone()));
+            std::mem::swap(&mut self.bank, &mut new);
             self.node_services.tpu.switch_to_leader(
-                &Arc::new(self.bank.copy_for_tpu()),
+                &self.bank,
                 PohServiceConfig::default(),
                 self.tpu_sockets
                     .iter()