Add --warp-epoch and --enable-inflation to ledger-tool cap.

ledger-tool/src/main.rs

@@ -22,13 +22,18 @@ use solana_runtime::{
     snapshot_utils::SnapshotVersion,
 };
 use solana_sdk::{
-    clock::Slot, genesis_config::GenesisConfig, hash::Hash, native_token::lamports_to_sol,
-    pubkey::Pubkey, shred_version::compute_shred_version,
+    clock::{Epoch, Slot},
+    genesis_config::GenesisConfig,
+    hash::Hash,
+    inflation::Inflation,
+    native_token::{lamports_to_sol, Sol},
+    pubkey::Pubkey,
+    shred_version::compute_shred_version,
 };
 use solana_vote_program::vote_state::VoteState;
 use std::{
     collections::{BTreeMap, BTreeSet, HashMap, HashSet},
-    convert::TryInto,
+    convert::{TryFrom, TryInto},
     ffi::OsStr,
     fs::{self, File},
     io::{self, stdout, BufRead, BufReader, Write},
@@ -690,6 +695,19 @@ fn open_genesis_config_by(ledger_path: &Path, matches: &ArgMatches<'_>) -> Genes
     open_genesis_config(ledger_path, max_genesis_archive_unpacked_size)
 }
 
+fn assert_capitalization(bank: &Bank) {
+    let calculated_capitalization = bank.calculate_capitalization();
+    assert_eq!(
+        bank.capitalization(),
+        calculated_capitalization,
+        "Capitalization mismatch!?: +/-{}",
+        Sol(u64::try_from(
+            (i128::from(calculated_capitalization) - i128::from(bank.capitalization())).abs()
+        )
+        .unwrap()),
+    );
+}
+
 #[allow(clippy::cognitive_complexity)]
 fn main() {
     // Ignore SIGUSR1 to prevent long-running calls being killed by logrotate
@@ -1010,12 +1028,36 @@ fn main() {
             .arg(&max_genesis_archive_unpacked_size_arg)
         ).subcommand(
             SubCommand::with_name("capitalization")
-            .about("Print capitalization (aka, total suppy)")
+            .about("Print capitalization (aka, total suppy) while checksumming it")
             .arg(&no_snapshot_arg)
             .arg(&account_paths_arg)
             .arg(&halt_at_slot_arg)
             .arg(&hard_forks_arg)
             .arg(&max_genesis_archive_unpacked_size_arg)
+            .arg(
+                Arg::with_name("warp_epoch")
+                    .required(false)
+                    .long("warp-epoch")
+                    .takes_value(true)
+                    .value_name("WARP_EPOCH")
+                    .help("After loading the snapshot warp the ledger to WARP_EPOCH, \
+                           which could be an epoch in a galaxy far far away"),
+            )
+            .arg(
+                Arg::with_name("enable_inflation")
+                    .required(false)
+                    .long("enable-inflation")
+                    .takes_value(false)
+                    .help("Always enable inflation when warping even if it's disabled"),
+            )
+            .arg(
+                Arg::with_name("recalculate_capitalization")
+                    .required(false)
+                    .long("recalculate-capitalization")
+                    .takes_value(false)
+                    .help("Recalculate capitalization before warping; circumvents \
+                          bank's out-of-sync capitalization"),
+            )
         ).subcommand(
             SubCommand::with_name("purge")
             .about("Delete a range of slots from the ledger.")
@@ -1558,52 +1600,97 @@ fn main() {
                         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
-                            )
+                    if arg_matches.is_present("recalculate_capitalization") {
+                        println!("Recalculating capitalization");
+                        let old_capitalization = bank.set_capitalization();
+                        if old_capitalization == bank.capitalization() {
+                            eprintln!("Capitalization was identical: {}", Sol(old_capitalization));
                         }
                     }
 
-                    let computed_capitalization: u64 = bank
-                        .get_program_accounts(None)
-                        .into_iter()
-                        .filter_map(|(_pubkey, account)| {
-                            if account.lamports == u64::max_value() {
-                                return None;
-                            }
+                    if arg_matches.is_present("warp_epoch") {
+                        let base_bank = bank;
 
-                            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();
+                        let raw_warp_epoch = value_t!(arg_matches, "warp_epoch", String).unwrap();
+                        let warp_epoch = if raw_warp_epoch.starts_with('+') {
+                            base_bank.epoch() + value_t!(arg_matches, "warp_epoch", Epoch).unwrap()
+                        } else {
+                            value_t!(arg_matches, "warp_epoch", Epoch).unwrap()
+                        };
+                        if warp_epoch < base_bank.epoch() {
+                            eprintln!(
+                                "Error: can't warp epoch backwards: {} => {}",
+                                base_bank.epoch(),
+                                warp_epoch
+                            );
+                            exit(1);
+                        }
 
-                    if bank.capitalization() != computed_capitalization {
-                        panic!(
-                            "Capitalization mismatch!?: {} != {}",
-                            bank.capitalization(),
-                            computed_capitalization
+                        if arg_matches.is_present("enable_inflation") {
+                            let inflation = Inflation::default();
+                            println!(
+                                "Forcing to: {:?} (was: {:?})",
+                                inflation,
+                                base_bank.inflation()
+                            );
+                            base_bank.set_inflation(inflation);
+                        }
+
+                        let next_epoch = base_bank
+                            .epoch_schedule()
+                            .get_first_slot_in_epoch(warp_epoch);
+                        let warped_bank =
+                            Bank::new_from_parent(&base_bank, base_bank.collector_id(), next_epoch);
+
+                        println!("Slot: {} => {}", base_bank.slot(), warped_bank.slot());
+                        println!("Epoch: {} => {}", base_bank.epoch(), warped_bank.epoch());
+                        assert_capitalization(&base_bank);
+                        assert_capitalization(&warped_bank);
+                        println!(
+                            "Capitalization: {} => {} (+{} {}%)",
+                            Sol(base_bank.capitalization()),
+                            Sol(warped_bank.capitalization()),
+                            Sol(warped_bank.capitalization() - base_bank.capitalization()),
+                            ((warped_bank.capitalization() as f64)
+                                / (base_bank.capitalization() as f64)
+                                * 100_f64),
                         );
+
+                        let mut overall_delta = 0;
+                        for (pubkey, warped_account) in
+                            warped_bank.get_all_accounts_modified_since_parent()
+                        {
+                            if let Some(base_account) = base_bank.get_account(&pubkey) {
+                                if base_account.lamports != warped_account.lamports {
+                                    let delta = warped_account.lamports - base_account.lamports;
+                                    println!(
+                                        "{}({}): {} => {} (+{})",
+                                        pubkey,
+                                        base_account.owner,
+                                        Sol(base_account.lamports),
+                                        Sol(warped_account.lamports),
+                                        Sol(delta),
+                                    );
+                                    overall_delta += delta;
+                                }
+                            }
+                        }
+                        if overall_delta > 0 {
+                            println!("Sum of lamports changes: {}", Sol(overall_delta));
+                        }
+                    } else {
+                        if arg_matches.is_present("recalculate_capitalization") {
+                            eprintln!("Capitalization isn't verified because it's recalculated");
+                        }
+                        if arg_matches.is_present("enable_inflation") {
+                            eprintln!(
+                                "Forcing inflation isn't meaningful because bank isn't warping"
+                            );
+                        }
+
+                        assert_capitalization(&bank);
+                        println!("Capitalization: {}", Sol(bank.capitalization()));
                     }
-                    println!("Capitalization: {}", Sol(bank.capitalization()));
                 }
                 Err(err) => {
                     eprintln!("Failed to load ledger: {:?}", err);

runtime/src/accounts.rs

@@ -377,9 +377,18 @@ impl Accounts {
             .collect()
     }
 
-    pub fn load_by_program_slot(&self, slot: Slot, program_id: &Pubkey) -> Vec<(Pubkey, Account)> {
+    pub fn load_by_program_slot(
+        &self,
+        slot: Slot,
+        program_id: Option<&Pubkey>,
+    ) -> Vec<(Pubkey, Account)> {
         self.scan_slot(slot, |stored_account| {
-            if stored_account.account_meta.owner == *program_id {
+            let hit = match program_id {
+                None => true,
+                Some(program_id) => stored_account.account_meta.owner == *program_id,
+            };
+
+            if hit {
                 Some((stored_account.meta.pubkey, stored_account.clone_account()))
             } else {
                 None
@@ -1371,11 +1380,11 @@ mod tests {
         let account2 = Account::new(1, 0, &Pubkey::new(&[3; 32]));
         accounts.store_slow(0, &pubkey2, &account2);
 
-        let loaded = accounts.load_by_program_slot(0, &Pubkey::new(&[2; 32]));
+        let loaded = accounts.load_by_program_slot(0, Some(&Pubkey::new(&[2; 32])));
         assert_eq!(loaded.len(), 2);
-        let loaded = accounts.load_by_program_slot(0, &Pubkey::new(&[3; 32]));
+        let loaded = accounts.load_by_program_slot(0, Some(&Pubkey::new(&[3; 32])));
         assert_eq!(loaded, vec![(pubkey2, account2)]);
-        let loaded = accounts.load_by_program_slot(0, &Pubkey::new(&[4; 32]));
+        let loaded = accounts.load_by_program_slot(0, Some(&Pubkey::new(&[4; 32])));
         assert_eq!(loaded, vec![]);
     }
 

runtime/src/bank.rs

@@ -2538,7 +2538,11 @@ impl Bank {
     ) -> Vec<(Pubkey, Account)> {
         self.rc
             .accounts
-            .load_by_program_slot(self.slot(), program_id)
+            .load_by_program_slot(self.slot(), Some(program_id))
+    }
+
+    pub fn get_all_accounts_modified_since_parent(&self) -> Vec<(Pubkey, Account)> {
+        self.rc.accounts.load_by_program_slot(self.slot(), None)
     }
 
     pub fn get_account_modified_since_parent(&self, pubkey: &Pubkey) -> Option<(Account, Slot)> {
@@ -2683,6 +2687,34 @@ impl Bank {
         }
     }
 
+    pub fn calculate_capitalization(&self) -> u64 {
+        self.get_program_accounts(None)
+            .into_iter()
+            .map(|(_pubkey, account)| {
+                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
+                    // always having a balance of 1 lamports, which is
+                    // outside the capitalization calculation.
+                    account.lamports - 1
+                } else {
+                    account.lamports
+                }
+            })
+            .sum()
+    }
+
+    /// Forcibly overwrites current capitalization by actually recalculating accounts' balances.
+    /// This should only be used for developing purposes.
+    pub fn set_capitalization(&self) -> u64 {
+        let old = self.capitalization();
+        self.capitalization
+            .store(self.calculate_capitalization(), Ordering::Relaxed);
+        old
+    }
+
     pub fn get_accounts_hash(&self) -> Hash {
         self.rc.accounts.accounts_db.get_accounts_hash(self.slot)
     }

sdk/src/native_token.rs

@@ -10,3 +10,29 @@ pub fn lamports_to_sol(lamports: u64) -> f64 {
 pub fn sol_to_lamports(sol: f64) -> u64 {
     (sol * LAMPORTS_PER_SOL as f64) as u64
 }
+
+use std::fmt::{Debug, Display, Formatter, Result};
+pub struct Sol(pub u64);
+
+impl Sol {
+    fn write_in_sol(&self, f: &mut Formatter) -> Result {
+        write!(
+            f,
+            "◎{}.{:09}",
+            self.0 / LAMPORTS_PER_SOL,
+            self.0 % LAMPORTS_PER_SOL
+        )
+    }
+}
+
+impl Display for Sol {
+    fn fmt(&self, f: &mut Formatter) -> Result {
+        self.write_in_sol(f)
+    }
+}
+
+impl Debug for Sol {
+    fn fmt(&self, f: &mut Formatter) -> Result {
+        self.write_in_sol(f)
+    }
+}