[wip] Correctly purge zero lamport accounts

ledger/src/snapshot_utils.rs

@@ -151,6 +151,7 @@ where
 }
 
 pub fn add_snapshot<P: AsRef<Path>>(snapshot_path: P, bank: &Bank) -> Result<()> {
+    trace!("ryoqun saving snapshot");
     bank.purge_zero_lamport_accounts();
     let slot = bank.slot();
     // snapshot_path/slot
@@ -211,6 +212,7 @@ pub fn bank_from_archive<P: AsRef<Path>>(
     snapshot_path: &PathBuf,
     snapshot_tar: P,
 ) -> Result<Bank> {
+    trace!("ryoqun loading snapshot");
     // Untar the snapshot into a temp directory under `snapshot_config.snapshot_path()`
     let unpack_dir = tempfile::tempdir_in(snapshot_path)?;
     untar_snapshot_in(&snapshot_tar, &unpack_dir)?;
@@ -224,6 +226,7 @@ pub fn bank_from_archive<P: AsRef<Path>>(
         unpacked_accounts_dir,
     )?;
 
+    bank.purge_zero_lamport_accounts();
     if !bank.verify_snapshot_bank() {
         panic!("Snapshot bank failed to verify");
     }

runtime/src/accounts.rs

@@ -331,6 +331,10 @@ impl Accounts {
         self.accounts_db.verify_hash_internal_state(slot, ancestors)
     }
 
+    pub fn verify_account_balances(&self, ancestors: &HashMap<Slot, usize>) -> bool {
+        self.accounts_db.verify_account_balances(ancestors)
+    }
+
     pub fn load_by_program(
         &self,
         ancestors: &HashMap<Slot, usize>,