Fix fee mismatch on snapshot deserialize (#12697)

Co-authored-by: Carl Lin <carl@solana.com>

core/tests/snapshots.rs

@@ -156,7 +156,7 @@ mod tests {
             .get(&deserialized_bank.slot())
             .unwrap()
             .clone();
-        bank.compare_bank(&deserialized_bank);
+        assert!(*bank == deserialized_bank);
 
         let slot_snapshot_paths = snapshot_utils::get_snapshot_paths(&snapshot_path);
 

explorer/wasm/src/stake_account.rs

@@ -113,7 +113,7 @@ pub type Epoch = u64;
 
 #[wasm_bindgen]
 #[repr(transparent)]
-#[derive(Serialize, Deserialize, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
+#[derive(Serialize, Debug, Deserialize, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)]
 pub struct Pubkey([u8; 32]);
 
 #[wasm_bindgen]
@@ -164,7 +164,7 @@ impl Stake {
 }
 
 #[wasm_bindgen]
-#[derive(Serialize, Deserialize, PartialEq, Clone, Copy)]
+#[derive(Serialize, Debug, Deserialize, PartialEq, Clone, Copy)]
 pub struct Delegation {
     /// to whom the stake is delegated
     voter_pubkey: Pubkey,

runtime/src/bank.rs

@@ -448,6 +448,7 @@ pub(crate) struct BankFieldsToDeserialize {
 // This is separated from BankFieldsToDeserialize to avoid cloning by using refs.
 // So, sync fields with BankFieldsToDeserialize!
 // all members are made public to remain Bank private and to make versioned serializer workable on this
+#[derive(Debug)]
 pub(crate) struct BankFieldsToSerialize<'a> {
     pub(crate) blockhash_queue: &'a RwLock<BlockhashQueue>,
     pub(crate) ancestors: &'a Ancestors,
@@ -482,6 +483,46 @@ pub(crate) struct BankFieldsToSerialize<'a> {
     pub(crate) is_delta: bool,
 }
 
+// Can't derive PartialEq because RwLock doesn't implement PartialEq
+impl PartialEq for Bank {
+    fn eq(&self, other: &Self) -> bool {
+        if ptr::eq(self, other) {
+            return true;
+        }
+        *self.blockhash_queue.read().unwrap() == *other.blockhash_queue.read().unwrap()
+            && self.ancestors == other.ancestors
+            && *self.hash.read().unwrap() == *other.hash.read().unwrap()
+            && self.parent_hash == other.parent_hash
+            && self.parent_slot == other.parent_slot
+            && *self.hard_forks.read().unwrap() == *other.hard_forks.read().unwrap()
+            && self.transaction_count.load(Relaxed) == other.transaction_count.load(Relaxed)
+            && self.tick_height.load(Relaxed) == other.tick_height.load(Relaxed)
+            && self.signature_count.load(Relaxed) == other.signature_count.load(Relaxed)
+            && self.capitalization.load(Relaxed) == other.capitalization.load(Relaxed)
+            && self.max_tick_height == other.max_tick_height
+            && self.hashes_per_tick == other.hashes_per_tick
+            && self.ticks_per_slot == other.ticks_per_slot
+            && self.ns_per_slot == other.ns_per_slot
+            && self.genesis_creation_time == other.genesis_creation_time
+            && self.slots_per_year == other.slots_per_year
+            && self.unused == other.unused
+            && self.slot == other.slot
+            && self.epoch == other.epoch
+            && self.block_height == other.block_height
+            && self.collector_id == other.collector_id
+            && self.collector_fees.load(Relaxed) == other.collector_fees.load(Relaxed)
+            && self.fee_calculator == other.fee_calculator
+            && self.fee_rate_governor == other.fee_rate_governor
+            && self.collected_rent.load(Relaxed) == other.collected_rent.load(Relaxed)
+            && self.rent_collector == other.rent_collector
+            && self.epoch_schedule == other.epoch_schedule
+            && *self.inflation.read().unwrap() == *other.inflation.read().unwrap()
+            && *self.stakes.read().unwrap() == *other.stakes.read().unwrap()
+            && self.epoch_stakes == other.epoch_stakes
+            && self.is_delta.load(Relaxed) == other.is_delta.load(Relaxed)
+    }
+}
+
 #[derive(Debug, PartialEq, Serialize, Deserialize, AbiExample, Default, Clone, Copy)]
 pub struct RewardInfo {
     pub lamports: i64,     // Reward amount
@@ -883,7 +924,11 @@ impl Bank {
         );
         assert_eq!(bank.epoch_schedule, genesis_config.epoch_schedule);
         assert_eq!(bank.epoch, bank.epoch_schedule.get_epoch(bank.slot));
-
+        bank.fee_rate_governor.lamports_per_signature = bank.fee_calculator.lamports_per_signature;
+        assert_eq!(
+            bank.fee_rate_governor.create_fee_calculator(),
+            bank.fee_calculator
+        );
         bank
     }
 
@@ -3652,51 +3697,6 @@ impl Bank {
         }
     }
 
-    pub fn compare_bank(&self, dbank: &Bank) {
-        if ptr::eq(self, dbank) {
-            return;
-        }
-        assert_eq!(self.slot, dbank.slot);
-        assert_eq!(self.collector_id, dbank.collector_id);
-        assert_eq!(self.epoch_schedule, dbank.epoch_schedule);
-        assert_eq!(self.hashes_per_tick, dbank.hashes_per_tick);
-        assert_eq!(self.ticks_per_slot, dbank.ticks_per_slot);
-        assert_eq!(self.parent_hash, dbank.parent_hash);
-        assert_eq!(
-            self.tick_height.load(Relaxed),
-            dbank.tick_height.load(Relaxed)
-        );
-        assert_eq!(self.is_delta.load(Relaxed), dbank.is_delta.load(Relaxed));
-
-        {
-            let bh = self.hash.read().unwrap();
-            let dbh = dbank.hash.read().unwrap();
-            assert_eq!(*bh, *dbh);
-        }
-
-        {
-            let st = self.stakes.read().unwrap();
-            let dst = dbank.stakes.read().unwrap();
-            assert_eq!(*st, *dst);
-        }
-
-        {
-            let bhq = self.blockhash_queue.read().unwrap();
-            let dbhq = dbank.blockhash_queue.read().unwrap();
-            assert_eq!(*bhq, *dbhq);
-        }
-
-        {
-            let sc = self.src.status_cache.read().unwrap();
-            let dsc = dbank.src.status_cache.read().unwrap();
-            assert_eq!(*sc, *dsc);
-        }
-        assert_eq!(
-            self.rc.accounts.bank_hash_at(self.slot),
-            dbank.rc.accounts.bank_hash_at(dbank.slot)
-        );
-    }
-
     pub fn clean_accounts(&self, skip_last: bool) {
         let max_clean_slot = if skip_last {
             // Don't clean the slot we're snapshotting because it may have zero-lamport

runtime/src/blockhash_queue.rs

@@ -13,7 +13,7 @@ struct HashAge {
 
 /// Low memory overhead, so can be cloned for every checkpoint
 #[frozen_abi(digest = "EwaoLA34VN18E95GvjmkeStUpWqTeBd7FGpd7mppLmEw")]
-#[derive(Clone, Debug, PartialEq, Serialize, Deserialize, AbiExample)]
+#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, AbiExample)]
 pub struct BlockhashQueue {
     /// updated whenever an hash is registered
     hash_height: u64,

runtime/src/epoch_stakes.rs

@@ -7,13 +7,13 @@ use std::{collections::HashMap, sync::Arc};
 pub type NodeIdToVoteAccounts = HashMap<Pubkey, NodeVoteAccounts>;
 pub type EpochAuthorizedVoters = HashMap<Pubkey, Pubkey>;
 
-#[derive(Clone, Serialize, Debug, Deserialize, Default, PartialEq, AbiExample)]
+#[derive(Clone, Serialize, Debug, Deserialize, Default, PartialEq, Eq, AbiExample)]
 pub struct NodeVoteAccounts {
     pub vote_accounts: Vec<Pubkey>,
     pub total_stake: u64,
 }
 
-#[derive(Clone, Serialize, Deserialize, AbiExample)]
+#[derive(Clone, Debug, Serialize, Deserialize, AbiExample, PartialEq)]
 pub struct EpochStakes {
     stakes: Arc<Stakes>,
     total_stake: u64,

runtime/src/serde_snapshot/tests.rs

@@ -219,7 +219,7 @@ fn test_bank_serialize_style(serde_style: SerdeStyle) {
     assert_eq!(dbank.get_balance(&key1.pubkey()), 0);
     assert_eq!(dbank.get_balance(&key2.pubkey()), 10);
     assert_eq!(dbank.get_balance(&key3.pubkey()), 0);
-    bank2.compare_bank(&dbank);
+    assert!(bank2 == dbank);
 }
 
 #[cfg(test)]

sdk/src/fee_calculator.rs

@@ -68,7 +68,7 @@ pub struct FeeRateGovernor {
     // The current cost of a signature  This amount may increase/decrease over time based on
     // cluster processing load.
     #[serde(skip)]
-    lamports_per_signature: u64,
+    pub lamports_per_signature: u64,
 
     // The target cost of a signature when the cluster is operating around target_signatures_per_slot
     // signatures

sdk/src/hard_forks.rs

@@ -4,7 +4,7 @@
 use byteorder::{ByteOrder, LittleEndian};
 use solana_sdk::clock::Slot;
 
-#[derive(Default, Clone, Deserialize, Serialize, AbiExample)]
+#[derive(Default, Clone, Debug, Deserialize, Serialize, AbiExample, PartialEq, Eq)]
 pub struct HardForks {
     hard_forks: Vec<(Slot, usize)>,
 }

sdk/src/stake_history.rs

@@ -8,7 +8,7 @@ use std::ops::Deref;
 
 pub const MAX_ENTRIES: usize = 512; // it should never take as many as 512 epochs to warm up or cool down
 
-#[derive(Debug, Serialize, Deserialize, PartialEq, Default, Clone, AbiExample)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Default, Clone, AbiExample)]
 pub struct StakeHistoryEntry {
     pub effective: u64,    // effective stake at this epoch
     pub activating: u64,   // sum of portion of stakes not fully warmed up
@@ -16,7 +16,7 @@ pub struct StakeHistoryEntry {
 }
 
 #[repr(C)]
-#[derive(Debug, Serialize, Deserialize, PartialEq, Default, Clone, AbiExample)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Default, Clone, AbiExample)]
 pub struct StakeHistory(Vec<(Epoch, StakeHistoryEntry)>);
 
 impl StakeHistory {