v1.1: Maintain sysvar balances for consistent market cap.

ledger-tool/src/main.rs

@@ -726,6 +726,13 @@ fn main() {
                     .takes_value(false)
                     .help("Include sysvars too"),
             )
+        ).subcommand(
+            SubCommand::with_name("capitalization")
+            .about("Print capitalization (aka, total suppy)")
+            .arg(&no_snapshot_arg)
+            .arg(&account_paths_arg)
+            .arg(&halt_at_slot_arg)
+            .arg(&hard_forks_arg)
         ).subcommand(
             SubCommand::with_name("prune")
             .about("Prune the ledger at the block height")
@@ -1049,6 +1056,83 @@ fn main() {
                 }
             }
         }
+        ("capitalization", Some(arg_matches)) => {
+            let dev_halt_at_slot = value_t!(arg_matches, "halt_at_slot", Slot).ok();
+            let process_options = ProcessOptions {
+                dev_halt_at_slot,
+                new_hard_forks: hardforks_of(arg_matches, "hard_forks"),
+                poh_verify: false,
+                ..ProcessOptions::default()
+            };
+            let genesis_config = open_genesis_config(&ledger_path);
+            match load_bank_forks(arg_matches, &ledger_path, &genesis_config, process_options) {
+                Ok((bank_forks, bank_forks_info, _leader_schedule_cache, _snapshot_hash)) => {
+                    let slot = dev_halt_at_slot.unwrap_or_else(|| {
+                        if bank_forks_info.len() > 1 {
+                            eprintln!("Error: multiple forks present");
+                            exit(1);
+                        }
+                        bank_forks_info[0].bank_slot
+                    });
+
+                    let bank = bank_forks.get(slot).unwrap_or_else(|| {
+                        eprintln!("Error: Slot {} is not available", slot);
+                        exit(1);
+                    });
+
+                    use solana_sdk::native_token::LAMPORTS_PER_SOL;
+                    use std::fmt::{Display, Formatter, Result};
+                    pub struct Sol(u64);
+
+                    impl Display for Sol {
+                        fn fmt(&self, f: &mut Formatter) -> Result {
+                            write!(
+                                f,
+                                "{}.{:09} SOL",
+                                self.0 / LAMPORTS_PER_SOL,
+                                self.0 % LAMPORTS_PER_SOL
+                            )
+                        }
+                    }
+
+                    let computed_capitalization: u64 = bank
+                        .get_program_accounts(None)
+                        .into_iter()
+                        .filter_map(|(_pubkey, account)| {
+                            if account.lamports == u64::max_value() {
+                                return None;
+                            }
+
+                            let is_specially_retained =
+                                solana_sdk::native_loader::check_id(&account.owner)
+                                    || solana_sdk::sysvar::check_id(&account.owner);
+
+                            if is_specially_retained {
+                                // specially retained accounts are ensured to exist by
+                                // alwaysing having a balance of 1 lamports, which is
+                                // outside the capitalization calculation.
+                                Some(account.lamports - 1)
+                            } else {
+                                Some(account.lamports)
+                            }
+                        })
+                        .sum();
+
+                    if bank.capitalization() != computed_capitalization {
+                        panic!(
+                            "Capitalization mismatch!?: {} != {}",
+                            bank.capitalization(),
+                            computed_capitalization
+                        );
+                    }
+                    println!("Capitalization: {}", Sol(bank.capitalization()));
+                }
+                Err(err) => {
+                    eprintln!("Failed to load ledger: {:?}", err);
+                    exit(1);
+                }
+            }
+        }
         ("purge", Some(arg_matches)) => {
             let start_slot = value_t_or_exit!(arg_matches, "start_slot", Slot);
             let end_slot = value_t!(arg_matches, "end_slot", Slot);

runtime/src/bank.rs

@@ -558,16 +558,20 @@ impl Bank {
         self.store_account(pubkey, &new_account);
     }
 
+    fn inherit_sysvar_account_balance(&self, old_account: &Option<Account>) -> u64 {
+        old_account.as_ref().map(|a| a.lamports).unwrap_or(1)
+    }
+
     fn update_clock(&self) {
-        self.update_sysvar_account(&sysvar::clock::id(), |_| {
+        self.update_sysvar_account(&sysvar::clock::id(), |account| {
             sysvar::clock::Clock {
                 slot: self.slot,
                 segment: get_segment_from_slot(self.slot, self.slots_per_segment),
                 epoch: self.epoch_schedule.get_epoch(self.slot),
                 leader_schedule_epoch: self.epoch_schedule.get_leader_schedule_epoch(self.slot),
                 unix_timestamp: self.unix_timestamp(),
             }
-            .create_account(1)
+            .create_account(self.inherit_sysvar_account_balance(account))
         });
     }
 
@@ -578,7 +582,7 @@ impl Bank {
                 .map(|account| SlotHistory::from_account(&account).unwrap())
                 .unwrap_or_default();
             slot_history.add(self.slot());
-            slot_history.create_account(1)
+            slot_history.create_account(self.inherit_sysvar_account_balance(account))
         });
     }
 
@@ -589,7 +593,7 @@ impl Bank {
                 .map(|account| SlotHashes::from_account(&account).unwrap())
                 .unwrap_or_default();
             slot_hashes.add(self.parent_slot, self.parent_hash);
-            slot_hashes.create_account(1)
+            slot_hashes.create_account(self.inherit_sysvar_account_balance(account))
         });
     }
 
@@ -624,20 +628,29 @@ impl Bank {
     }
 
     fn update_fees(&self) {
-        self.update_sysvar_account(&sysvar::fees::id(), |_| {
-            sysvar::fees::create_account(1, &self.fee_calculator)
+        self.update_sysvar_account(&sysvar::fees::id(), |account| {
+            sysvar::fees::create_account(
+                self.inherit_sysvar_account_balance(account),
+                &self.fee_calculator,
+            )
         });
     }
 
     fn update_rent(&self) {
-        self.update_sysvar_account(&sysvar::rent::id(), |_| {
-            sysvar::rent::create_account(1, &self.rent_collector.rent)
+        self.update_sysvar_account(&sysvar::rent::id(), |account| {
+            sysvar::rent::create_account(
+                self.inherit_sysvar_account_balance(account),
+                &self.rent_collector.rent,
+            )
         });
     }
 
     fn update_epoch_schedule(&self) {
-        self.update_sysvar_account(&sysvar::epoch_schedule::id(), |_| {
-            sysvar::epoch_schedule::create_account(1, &self.epoch_schedule)
+        self.update_sysvar_account(&sysvar::epoch_schedule::id(), |account| {
+            sysvar::epoch_schedule::create_account(
+                self.inherit_sysvar_account_balance(account),
+                &self.epoch_schedule,
+            )
         });
     }
 
@@ -646,8 +659,11 @@ impl Bank {
             return;
         }
         // if I'm the first Bank in an epoch, ensure stake_history is updated
-        self.update_sysvar_account(&sysvar::stake_history::id(), |_| {
-            sysvar::stake_history::create_account(1, self.stakes.read().unwrap().history())
+        self.update_sysvar_account(&sysvar::stake_history::id(), |account| {
+            sysvar::stake_history::create_account(
+                self.inherit_sysvar_account_balance(account),
+                self.stakes.read().unwrap().history(),
+            )
         });
     }
 
@@ -682,8 +698,12 @@ impl Bank {
             validator_rewards / validator_points as f64,
             storage_rewards / storage_points as f64,
         );
-        self.update_sysvar_account(&sysvar::rewards::id(), |_| {
-            sysvar::rewards::create_account(1, validator_point_value, storage_point_value)
+        self.update_sysvar_account(&sysvar::rewards::id(), |account| {
+            sysvar::rewards::create_account(
+                self.inherit_sysvar_account_balance(account),
+                validator_point_value,
+                storage_point_value,
+            )
         });
 
         let validator_rewards = self.pay_validator_rewards(validator_point_value);
@@ -749,10 +769,13 @@ impl Bank {
     }
 
     pub fn update_recent_blockhashes(&self) {
-        self.update_sysvar_account(&sysvar::recent_blockhashes::id(), |_| {
+        self.update_sysvar_account(&sysvar::recent_blockhashes::id(), |account| {
             let blockhash_queue = self.blockhash_queue.read().unwrap();
             let recent_blockhash_iter = blockhash_queue.get_recent_blockhashes();
-            sysvar::recent_blockhashes::create_account_with_data(1, recent_blockhash_iter)
+            sysvar::recent_blockhashes::create_account_with_data(
+                self.inherit_sysvar_account_balance(account),
+                recent_blockhash_iter,
+            )
         });
     }
 
@@ -1928,12 +1951,13 @@ impl Bank {
         }
 
         info!(
-            "bank frozen: {} hash: {} accounts_delta: {} signature_count: {} last_blockhash: {}",
+            "bank frozen: {} hash: {} accounts_delta: {} signature_count: {} last_blockhash: {} capitalization: {}",
             self.slot(),
             hash,
             accounts_delta_hash.hash,
             self.signature_count(),
             self.last_blockhash(),
+            self.capitalization(),
         );
 
         info!(
@@ -3539,6 +3563,27 @@ mod tests {
         assert_eq!(bank.get_balance(&pubkey), 500);
     }
 
+    #[test]
+    fn test_transfer_to_sysvar() {
+        solana_logger::setup();
+        let (genesis_config, mint_keypair) = create_genesis_config(10_000);
+        let bank = Arc::new(Bank::new(&genesis_config));
+
+        let normal_pubkey = Pubkey::new_rand();
+        let sysvar_pubkey = sysvar::clock::id();
+        assert_eq!(bank.get_balance(&normal_pubkey), 0);
+        assert_eq!(bank.get_balance(&sysvar_pubkey), 1);
+
+        bank.transfer(500, &mint_keypair, &normal_pubkey).unwrap();
+        bank.transfer(500, &mint_keypair, &sysvar_pubkey).unwrap();
+        assert_eq!(bank.get_balance(&normal_pubkey), 500);
+        assert_eq!(bank.get_balance(&sysvar_pubkey), 501);
+
+        let bank = Arc::new(new_from_parent(&bank));
+        assert_eq!(bank.get_balance(&normal_pubkey), 500);
+        assert_eq!(bank.get_balance(&sysvar_pubkey), 501);
+    }
+
     #[test]
     fn test_bank_deposit() {
         let (genesis_config, _mint_keypair) = create_genesis_config(100);