Reformat imports to a consistent style for imports

rustfmt.toml configuration:
        imports_granularity = "One"
         group_imports = "One"

account-decoder/src/lib.rs

@@ -17,8 +17,10 @@ pub mod validator_info;
 use {
     crate::parse_account_data::{parse_account_data, AccountAdditionalData, ParsedAccount},
     solana_sdk::{
-        account::ReadableAccount, account::WritableAccount, clock::Epoch,
-        fee_calculator::FeeCalculator, pubkey::Pubkey,
+        account::{ReadableAccount, WritableAccount},
+        clock::Epoch,
+        fee_calculator::FeeCalculator,
+        pubkey::Pubkey,
     },
     std::{
         io::{Read, Write},
@@ -202,8 +204,10 @@ fn slice_data(data: &[u8], data_slice_config: Option<UiDataSliceConfig>) -> &[u8
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_sdk::account::{Account, AccountSharedData};
+    use {
+        super::*,
+        solana_sdk::account::{Account, AccountSharedData},
+    };
 
     #[test]
     fn test_slice_data() {

account-decoder/src/parse_account_data.rs

@@ -1,4 +1,5 @@
-use crate::{
+use {
+    crate::{
         parse_bpf_loader::parse_bpf_upgradeable_loader,
         parse_config::parse_config,
         parse_nonce::parse_nonce,
@@ -6,12 +7,13 @@ use crate::{
         parse_sysvar::parse_sysvar,
         parse_token::{parse_token, spl_token_id},
         parse_vote::parse_vote,
+    },
+    inflector::Inflector,
+    serde_json::Value,
+    solana_sdk::{instruction::InstructionError, pubkey::Pubkey, stake, system_program, sysvar},
+    std::collections::HashMap,
+    thiserror::Error,
 };
-use inflector::Inflector;
-use serde_json::Value;
-use solana_sdk::{instruction::InstructionError, pubkey::Pubkey, stake, system_program, sysvar};
-use std::collections::HashMap;
-use thiserror::Error;
 
 lazy_static! {
     static ref BPF_UPGRADEABLE_LOADER_PROGRAM_ID: Pubkey = solana_sdk::bpf_loader_upgradeable::id();
@@ -112,12 +114,14 @@ pub fn parse_account_data(
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_sdk::nonce::{
+    use {
+        super::*,
+        solana_sdk::nonce::{
             state::{Data, Versions},
             State,
+        },
+        solana_vote_program::vote_state::{VoteState, VoteStateVersions},
     };
-    use solana_vote_program::vote_state::{VoteState, VoteStateVersions};
 
     #[test]
     fn test_parse_account_data() {

account-decoder/src/parse_bpf_loader.rs

@@ -1,9 +1,11 @@
-use crate::{
+use {
+    crate::{
         parse_account_data::{ParsableAccount, ParseAccountError},
         UiAccountData, UiAccountEncoding,
+    },
+    bincode::{deserialize, serialized_size},
+    solana_sdk::{bpf_loader_upgradeable::UpgradeableLoaderState, pubkey::Pubkey},
 };
-use bincode::{deserialize, serialized_size};
-use solana_sdk::{bpf_loader_upgradeable::UpgradeableLoaderState, pubkey::Pubkey};
 
 pub fn parse_bpf_upgradeable_loader(
     data: &[u8],
@@ -90,9 +92,7 @@ pub struct UiProgramData {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use bincode::serialize;
-    use solana_sdk::pubkey::Pubkey;
+    use {super::*, bincode::serialize, solana_sdk::pubkey::Pubkey};
 
     #[test]
     fn test_parse_bpf_upgradeable_loader_accounts() {

account-decoder/src/parse_config.rs

@@ -1,12 +1,16 @@
-use crate::{
+use {
+    crate::{
         parse_account_data::{ParsableAccount, ParseAccountError},
         validator_info,
+    },
+    bincode::deserialize,
+    serde_json::Value,
+    solana_config_program::{get_config_data, ConfigKeys},
+    solana_sdk::{
+        pubkey::Pubkey,
+        stake::config::{self as stake_config, Config as StakeConfig},
+    },
 };
-use bincode::deserialize;
-use serde_json::Value;
-use solana_config_program::{get_config_data, ConfigKeys};
-use solana_sdk::pubkey::Pubkey;
-use solana_sdk::stake::config::{self as stake_config, Config as StakeConfig};
 
 pub fn parse_config(data: &[u8], pubkey: &Pubkey) -> Result<ConfigAccountType, ParseAccountError> {
     let parsed_account = if pubkey == &stake_config::id() {
@@ -87,11 +91,10 @@ pub struct UiConfig<T> {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use crate::validator_info::ValidatorInfo;
-    use serde_json::json;
-    use solana_config_program::create_config_account;
-    use solana_sdk::account::ReadableAccount;
+    use {
+        super::*, crate::validator_info::ValidatorInfo, serde_json::json,
+        solana_config_program::create_config_account, solana_sdk::account::ReadableAccount,
+    };
 
     #[test]
     fn test_parse_config() {

account-decoder/src/parse_nonce.rs

@@ -1,7 +1,9 @@
-use crate::{parse_account_data::ParseAccountError, UiFeeCalculator};
-use solana_sdk::{
+use {
+    crate::{parse_account_data::ParseAccountError, UiFeeCalculator},
+    solana_sdk::{
         instruction::InstructionError,
         nonce::{state::Versions, State},
+    },
 };
 
 pub fn parse_nonce(data: &[u8]) -> Result<UiNonceState, ParseAccountError> {
@@ -42,14 +44,16 @@ pub struct UiNonceData {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_sdk::{
+    use {
+        super::*,
+        solana_sdk::{
             hash::Hash,
             nonce::{
                 state::{Data, Versions},
                 State,
             },
             pubkey::Pubkey,
+        },
     };
 
     #[test]

account-decoder/src/parse_stake.rs

@@ -1,10 +1,14 @@
-use crate::{
+use {
+    crate::{
         parse_account_data::{ParsableAccount, ParseAccountError},
         StringAmount,
+    },
+    bincode::deserialize,
+    solana_sdk::{
+        clock::{Epoch, UnixTimestamp},
+        stake::state::{Authorized, Delegation, Lockup, Meta, Stake, StakeState},
+    },
 };
-use bincode::deserialize;
-use solana_sdk::clock::{Epoch, UnixTimestamp};
-use solana_sdk::stake::state::{Authorized, Delegation, Lockup, Meta, Stake, StakeState};
 
 pub fn parse_stake(data: &[u8]) -> Result<StakeAccountType, ParseAccountError> {
     let stake_state: StakeState = deserialize(data)
@@ -132,8 +136,7 @@ impl From<Delegation> for UiDelegation {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use bincode::serialize;
+    use {super::*, bincode::serialize};
 
     #[test]
     fn test_parse_stake() {

account-decoder/src/parse_sysvar.rs

@@ -1,10 +1,11 @@
-use crate::{
+use {
+    crate::{
         parse_account_data::{ParsableAccount, ParseAccountError},
         StringAmount, UiFeeCalculator,
-};
-use bincode::deserialize;
-use bv::BitVec;
-use solana_sdk::{
+    },
+    bincode::deserialize,
+    bv::BitVec,
+    solana_sdk::{
         clock::{Clock, Epoch, Slot, UnixTimestamp},
         epoch_schedule::EpochSchedule,
         pubkey::Pubkey,
@@ -13,6 +14,7 @@ use solana_sdk::{
         slot_history::{self, SlotHistory},
         stake_history::{StakeHistory, StakeHistoryEntry},
         sysvar::{self, fees::Fees, recent_blockhashes::RecentBlockhashes, rewards::Rewards},
+    },
 };
 
 pub fn parse_sysvar(data: &[u8], pubkey: &Pubkey) -> Result<SysvarAccountType, ParseAccountError> {
@@ -212,10 +214,12 @@ pub struct UiStakeHistoryEntry {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_sdk::{
+    use {
+        super::*,
+        solana_sdk::{
             account::create_account_for_test, fee_calculator::FeeCalculator, hash::Hash,
             sysvar::recent_blockhashes::IterItem,
+        },
     };
 
     #[test]

account-decoder/src/parse_token.rs

@@ -1,15 +1,17 @@
-use crate::{
+use {
+    crate::{
         parse_account_data::{ParsableAccount, ParseAccountError},
         StringAmount, StringDecimals,
-};
-use solana_sdk::pubkey::Pubkey;
-use spl_token::{
+    },
+    solana_sdk::pubkey::Pubkey,
+    spl_token::{
         solana_program::{
             program_option::COption, program_pack::Pack, pubkey::Pubkey as SplTokenPubkey,
         },
         state::{Account, AccountState, Mint, Multisig},
+    },
+    std::str::FromStr,
 };
-use std::str::FromStr;
 
 // A helper function to convert spl_token::id() as spl_sdk::pubkey::Pubkey to
 // solana_sdk::pubkey::Pubkey

account-decoder/src/parse_vote.rs

@@ -1,9 +1,11 @@
-use crate::{parse_account_data::ParseAccountError, StringAmount};
-use solana_sdk::{
+use {
+    crate::{parse_account_data::ParseAccountError, StringAmount},
+    solana_sdk::{
         clock::{Epoch, Slot},
         pubkey::Pubkey,
+    },
+    solana_vote_program::vote_state::{BlockTimestamp, Lockout, VoteState},
 };
-use solana_vote_program::vote_state::{BlockTimestamp, Lockout, VoteState};
 
 pub fn parse_vote(data: &[u8]) -> Result<VoteAccountType, ParseAccountError> {
     let mut vote_state = VoteState::deserialize(data).map_err(ParseAccountError::from)?;
@@ -121,8 +123,7 @@ struct UiEpochCredits {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_vote_program::vote_state::VoteStateVersions;
+    use {super::*, solana_vote_program::vote_state::VoteStateVersions};
 
     #[test]
     fn test_parse_vote() {

accounts-bench/src/main.rs

@@ -1,17 +1,19 @@
 #![allow(clippy::integer_arithmetic)]
 #[macro_use]
 extern crate log;
-use clap::{crate_description, crate_name, value_t, App, Arg};
-use rayon::prelude::*;
-use solana_measure::measure::Measure;
-use solana_runtime::{
+use {
+    clap::{crate_description, crate_name, value_t, App, Arg},
+    rayon::prelude::*,
+    solana_measure::measure::Measure,
+    solana_runtime::{
         accounts::{create_test_accounts, update_accounts_bench, Accounts},
         accounts_db::AccountShrinkThreshold,
         accounts_index::AccountSecondaryIndexes,
         ancestors::Ancestors,
+    },
+    solana_sdk::{genesis_config::ClusterType, pubkey::Pubkey},
+    std::{env, fs, path::PathBuf},
 };
-use solana_sdk::{genesis_config::ClusterType, pubkey::Pubkey};
-use std::{env, fs, path::PathBuf};
 
 fn main() {
     solana_logger::setup();

accounts-cluster-bench/src/main.rs

@@ -1,16 +1,17 @@
 #![allow(clippy::integer_arithmetic)]
-use clap::{crate_description, crate_name, value_t, values_t_or_exit, App, Arg};
-use log::*;
-use rand::{thread_rng, Rng};
-use rayon::prelude::*;
-use solana_account_decoder::parse_token::spl_token_pubkey;
-use solana_clap_utils::input_parsers::pubkey_of;
-use solana_client::rpc_client::RpcClient;
-use solana_faucet::faucet::{request_airdrop_transaction, FAUCET_PORT};
-use solana_gossip::gossip_service::discover;
-use solana_measure::measure::Measure;
-use solana_runtime::inline_spl_token;
-use solana_sdk::{
+use {
+    clap::{crate_description, crate_name, value_t, values_t_or_exit, App, Arg},
+    log::*,
+    rand::{thread_rng, Rng},
+    rayon::prelude::*,
+    solana_account_decoder::parse_token::spl_token_pubkey,
+    solana_clap_utils::input_parsers::pubkey_of,
+    solana_client::rpc_client::RpcClient,
+    solana_faucet::faucet::{request_airdrop_transaction, FAUCET_PORT},
+    solana_gossip::gossip_service::discover,
+    solana_measure::measure::Measure,
+    solana_runtime::inline_spl_token,
+    solana_sdk::{
         commitment_config::CommitmentConfig,
         message::Message,
         pubkey::Pubkey,
@@ -19,10 +20,10 @@ use solana_sdk::{
         system_instruction, system_program,
         timing::timestamp,
         transaction::Transaction,
-};
-use solana_streamer::socket::SocketAddrSpace;
-use solana_transaction_status::parse_token::spl_token_instruction;
-use std::{
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    solana_transaction_status::parse_token::spl_token_instruction,
+    std::{
         net::SocketAddr,
         process::exit,
         sync::{
@@ -31,6 +32,7 @@ use std::{
         },
         thread::{sleep, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 // Create and close messages both require 2 signatures; if transaction construction changes, update
@@ -701,13 +703,15 @@ fn main() {
 
 #[cfg(test)]
 pub mod test {
-    use super::*;
-    use solana_core::validator::ValidatorConfig;
-    use solana_local_cluster::{
+    use {
+        super::*,
+        solana_core::validator::ValidatorConfig,
+        solana_local_cluster::{
             local_cluster::{ClusterConfig, LocalCluster},
             validator_configs::make_identical_validator_configs,
+        },
+        solana_sdk::poh_config::PohConfig,
     };
-    use solana_sdk::poh_config::PohConfig;
 
     #[test]
     fn test_accounts_cluster_bench() {

accountsdb-plugin-postgres/src/accountsdb_plugin_postgres.rs

@@ -1,5 +1,4 @@
 use solana_measure::measure::Measure;
-
 /// Main entry for the PostgreSQL plugin
 use {
     crate::{

banking-bench/src/main.rs

@@ -1,36 +1,37 @@
 #![allow(clippy::integer_arithmetic)]
-use clap::{crate_description, crate_name, value_t, App, Arg};
-use crossbeam_channel::unbounded;
-use log::*;
-use rand::{thread_rng, Rng};
-use rayon::prelude::*;
-use solana_core::banking_stage::BankingStage;
-use solana_gossip::{cluster_info::ClusterInfo, cluster_info::Node};
-use solana_ledger::{
+use {
+    clap::{crate_description, crate_name, value_t, App, Arg},
+    crossbeam_channel::unbounded,
+    log::*,
+    rand::{thread_rng, Rng},
+    rayon::prelude::*,
+    solana_core::banking_stage::BankingStage,
+    solana_gossip::cluster_info::{ClusterInfo, Node},
+    solana_ledger::{
         blockstore::Blockstore,
         genesis_utils::{create_genesis_config, GenesisConfigInfo},
         get_tmp_ledger_path,
-};
-use solana_measure::measure::Measure;
-use solana_perf::packet::to_packets_chunked;
-use solana_poh::poh_recorder::{create_test_recorder, PohRecorder, WorkingBankEntry};
-use solana_runtime::{
+    },
+    solana_measure::measure::Measure,
+    solana_perf::packet::to_packets_chunked,
+    solana_poh::poh_recorder::{create_test_recorder, PohRecorder, WorkingBankEntry},
+    solana_runtime::{
         accounts_background_service::AbsRequestSender, bank::Bank, bank_forks::BankForks,
         cost_model::CostModel,
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         hash::Hash,
-    signature::Keypair,
-    signature::Signature,
+        signature::{Keypair, Signature},
         system_transaction,
         timing::{duration_as_us, timestamp},
         transaction::Transaction,
-};
-use solana_streamer::socket::SocketAddrSpace;
-use std::{
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    std::{
         sync::{atomic::Ordering, mpsc::Receiver, Arc, Mutex, RwLock},
         thread::sleep,
         time::{Duration, Instant},
+    },
 };
 
 fn check_txs(

banks-client/src/lib.rs

@@ -5,37 +5,38 @@
 //! but they are undocumented, may change over time, and are generally more
 //! cumbersome to use.
 
-use borsh::BorshDeserialize;
-use futures::{future::join_all, Future, FutureExt};
 pub use solana_banks_interface::{BanksClient as TarpcClient, TransactionStatus};
-use solana_banks_interface::{BanksRequest, BanksResponse};
-use solana_program::{
-    clock::Clock,
-    clock::Slot,
+use {
+    borsh::BorshDeserialize,
+    futures::{future::join_all, Future, FutureExt},
+    solana_banks_interface::{BanksRequest, BanksResponse},
+    solana_program::{
+        clock::{Clock, Slot},
         fee_calculator::FeeCalculator,
         hash::Hash,
         program_pack::Pack,
         pubkey::Pubkey,
         rent::Rent,
         sysvar::{self, Sysvar},
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         account::{from_account, Account},
         commitment_config::CommitmentLevel,
         signature::Signature,
         transaction::{self, Transaction},
         transport,
-};
-use std::io::{self, Error, ErrorKind};
-use tarpc::{
+    },
+    std::io::{self, Error, ErrorKind},
+    tarpc::{
         client::{self, channel::RequestDispatch, NewClient},
         context::{self, Context},
         rpc::{ClientMessage, Response},
         serde_transport::tcp,
         Transport,
+    },
+    tokio::{net::ToSocketAddrs, time::Duration},
+    tokio_serde::formats::Bincode,
 };
-use tokio::{net::ToSocketAddrs, time::Duration};
-use tokio_serde::formats::Bincode;
 
 // This exists only for backward compatibility
 pub trait BanksClientExt {}
@@ -348,16 +349,18 @@ pub async fn start_tcp_client<T: ToSocketAddrs>(addr: T) -> io::Result<BanksClie
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_banks_server::banks_server::start_local_server;
-    use solana_runtime::{
+    use {
+        super::*,
+        solana_banks_server::banks_server::start_local_server,
+        solana_runtime::{
             bank::Bank, bank_forks::BankForks, commitment::BlockCommitmentCache,
             genesis_utils::create_genesis_config,
+        },
+        solana_sdk::{message::Message, signature::Signer, system_instruction},
+        std::sync::{Arc, RwLock},
+        tarpc::transport,
+        tokio::{runtime::Runtime, time::sleep},
     };
-    use solana_sdk::{message::Message, signature::Signer, system_instruction};
-    use std::sync::{Arc, RwLock};
-    use tarpc::transport;
-    use tokio::{runtime::Runtime, time::sleep};
 
     #[test]
     fn test_banks_client_new() {

banks-interface/src/lib.rs

@@ -1,5 +1,6 @@
-use serde::{Deserialize, Serialize};
-use solana_sdk::{
+use {
+    serde::{Deserialize, Serialize},
+    solana_sdk::{
         account::Account,
         clock::Slot,
         commitment_config::CommitmentLevel,
@@ -8,6 +9,7 @@ use solana_sdk::{
         pubkey::Pubkey,
         signature::Signature,
         transaction::{self, Transaction, TransactionError},
+    },
 };
 
 #[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
@@ -47,8 +49,10 @@ pub trait Banks {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use tarpc::{client, transport};
+    use {
+        super::*,
+        tarpc::{client, transport},
+    };
 
     #[test]
     fn test_banks_client_new() {

banks-server/src/banks_server.rs

@@ -1,14 +1,15 @@
-use crate::send_transaction_service::{SendTransactionService, TransactionInfo};
-use bincode::{deserialize, serialize};
-use futures::{
+use {
+    crate::send_transaction_service::{SendTransactionService, TransactionInfo},
+    bincode::{deserialize, serialize},
+    futures::{
         future,
         prelude::stream::{self, StreamExt},
-};
-use solana_banks_interface::{
+    },
+    solana_banks_interface::{
         Banks, BanksRequest, BanksResponse, TransactionConfirmationStatus, TransactionStatus,
-};
-use solana_runtime::{bank::Bank, bank_forks::BankForks, commitment::BlockCommitmentCache};
-use solana_sdk::{
+    },
+    solana_runtime::{bank::Bank, bank_forks::BankForks, commitment::BlockCommitmentCache},
+    solana_sdk::{
         account::Account,
         clock::Slot,
         commitment_config::CommitmentLevel,
@@ -18,8 +19,8 @@ use solana_sdk::{
         pubkey::Pubkey,
         signature::Signature,
         transaction::{self, Transaction},
-};
-use std::{
+    },
+    std::{
         io,
         net::{Ipv4Addr, SocketAddr},
         sync::{
@@ -28,16 +29,17 @@ use std::{
         },
         thread::Builder,
         time::Duration,
-};
-use tarpc::{
+    },
+    tarpc::{
         context::Context,
         rpc::{transport::channel::UnboundedChannel, ClientMessage, Response},
         serde_transport::tcp,
         server::{self, Channel, Handler},
         transport,
+    },
+    tokio::time::sleep,
+    tokio_serde::formats::Bincode,
 };
-use tokio::time::sleep;
-use tokio_serde::formats::Bincode;
 
 #[derive(Clone)]
 struct BanksServer {

banks-server/src/rpc_banks_service.rs

@@ -1,21 +1,23 @@
 //! The `rpc_banks_service` module implements the Solana Banks RPC API.
 
-use crate::banks_server::start_tcp_server;
-use futures::{future::FutureExt, pin_mut, prelude::stream::StreamExt, select};
-use solana_runtime::{bank_forks::BankForks, commitment::BlockCommitmentCache};
-use std::{
+use {
+    crate::banks_server::start_tcp_server,
+    futures::{future::FutureExt, pin_mut, prelude::stream::StreamExt, select},
+    solana_runtime::{bank_forks::BankForks, commitment::BlockCommitmentCache},
+    std::{
         net::SocketAddr,
         sync::{
             atomic::{AtomicBool, Ordering},
             Arc, RwLock,
         },
         thread::{self, Builder, JoinHandle},
-};
-use tokio::{
+    },
+    tokio::{
         runtime::Runtime,
         time::{self, Duration},
+    },
+    tokio_stream::wrappers::IntervalStream,
 };
-use tokio_stream::wrappers::IntervalStream;
 
 pub struct RpcBanksService {
     thread_hdl: JoinHandle<()>,
@@ -101,8 +103,7 @@ impl RpcBanksService {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_runtime::bank::Bank;
+    use {super::*, solana_runtime::bank::Bank};
 
     #[test]
     fn test_rpc_banks_server_exit() {

banks-server/src/send_transaction_service.rs

@@ -1,9 +1,10 @@
 // TODO: Merge this implementation with the one at `core/src/send_transaction_service.rs`
-use log::*;
-use solana_metrics::{datapoint_warn, inc_new_counter_info};
-use solana_runtime::{bank::Bank, bank_forks::BankForks};
-use solana_sdk::signature::Signature;
-use std::{
+use {
+    log::*,
+    solana_metrics::{datapoint_warn, inc_new_counter_info},
+    solana_runtime::{bank::Bank, bank_forks::BankForks},
+    solana_sdk::signature::Signature,
+    std::{
         collections::HashMap,
         net::{SocketAddr, UdpSocket},
         sync::{
@@ -12,6 +13,7 @@ use std::{
         },
         thread::{self, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 /// Maximum size of the transaction queue
@@ -183,12 +185,14 @@ impl SendTransactionService {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_sdk::{
+    use {
+        super::*,
+        solana_sdk::{
             genesis_config::create_genesis_config, pubkey::Pubkey, signature::Signer,
             system_transaction,
+        },
+        std::sync::mpsc::channel,
     };
-    use std::sync::mpsc::channel;
 
     #[test]
     fn service_exit() {

bench-exchange/src/bench.rs

@@ -1,28 +1,29 @@
 #![allow(clippy::useless_attribute)]
 #![allow(clippy::integer_arithmetic)]
 
-use crate::order_book::*;
-use itertools::izip;
-use log::*;
-use rand::{thread_rng, Rng};
-use rayon::prelude::*;
-use solana_client::perf_utils::{sample_txs, SampleStats};
-use solana_core::gen_keys::GenKeys;
-use solana_exchange_program::{exchange_instruction, exchange_state::*, id};
-use solana_faucet::faucet::request_airdrop_transaction;
-use solana_genesis::Base64Account;
-use solana_metrics::datapoint_info;
-use solana_sdk::{
+use {
+    crate::order_book::*,
+    itertools::izip,
+    log::*,
+    rand::{thread_rng, Rng},
+    rayon::prelude::*,
+    solana_client::perf_utils::{sample_txs, SampleStats},
+    solana_core::gen_keys::GenKeys,
+    solana_exchange_program::{exchange_instruction, exchange_state::*, id},
+    solana_faucet::faucet::request_airdrop_transaction,
+    solana_genesis::Base64Account,
+    solana_metrics::datapoint_info,
+    solana_sdk::{
         client::{Client, SyncClient},
         commitment_config::CommitmentConfig,
         message::Message,
         pubkey::Pubkey,
         signature::{Keypair, Signer},
+        system_instruction, system_program,
         timing::{duration_as_ms, duration_as_s},
         transaction::Transaction,
-    {system_instruction, system_program},
-};
-use std::{
+    },
+    std::{
         cmp,
         collections::{HashMap, VecDeque},
         fs::File,
@@ -38,6 +39,7 @@ use std::{
         },
         thread::{sleep, Builder},
         time::{Duration, Instant},
+    },
 };
 
 // TODO Chunk length as specified results in a bunch of failures, divide by 10 helps...

bench-exchange/src/cli.rs

@@ -1,10 +1,10 @@
-use clap::{crate_description, crate_name, value_t, App, Arg, ArgMatches};
-use solana_core::gen_keys::GenKeys;
-use solana_faucet::faucet::FAUCET_PORT;
-use solana_sdk::signature::{read_keypair_file, Keypair};
-use std::net::SocketAddr;
-use std::process::exit;
-use std::time::Duration;
+use {
+    clap::{crate_description, crate_name, value_t, App, Arg, ArgMatches},
+    solana_core::gen_keys::GenKeys,
+    solana_faucet::faucet::FAUCET_PORT,
+    solana_sdk::signature::{read_keypair_file, Keypair},
+    std::{net::SocketAddr, process::exit, time::Duration},
+};
 
 pub struct Config {
     pub entrypoint_addr: SocketAddr,

bench-exchange/src/main.rs

@@ -3,11 +3,13 @@ pub mod bench;
 mod cli;
 pub mod order_book;
 
-use crate::bench::{airdrop_lamports, create_client_accounts_file, do_bench_exchange, Config};
-use log::*;
-use solana_gossip::gossip_service::{discover_cluster, get_multi_client};
-use solana_sdk::signature::Signer;
-use solana_streamer::socket::SocketAddrSpace;
+use {
+    crate::bench::{airdrop_lamports, create_client_accounts_file, do_bench_exchange, Config},
+    log::*,
+    solana_gossip::gossip_service::{discover_cluster, get_multi_client},
+    solana_sdk::signature::Signer,
+    solana_streamer::socket::SocketAddrSpace,
+};
 
 fn main() {
     solana_logger::setup();

bench-exchange/src/order_book.rs

@@ -1,11 +1,13 @@
-use itertools::EitherOrBoth::{Both, Left, Right};
-use itertools::Itertools;
-use log::*;
-use solana_exchange_program::exchange_state::*;
-use solana_sdk::pubkey::Pubkey;
-use std::cmp::Ordering;
-use std::collections::BinaryHeap;
-use std::{error, fmt};
+use {
+    itertools::{
+        EitherOrBoth::{Both, Left, Right},
+        Itertools,
+    },
+    log::*,
+    solana_exchange_program::exchange_state::*,
+    solana_sdk::pubkey::Pubkey,
+    std::{cmp::Ordering, collections::BinaryHeap, error, fmt},
+};
 
 #[derive(Clone, Debug, Eq, PartialEq)]
 pub struct ToOrder {

bench-exchange/tests/bench_exchange.rs

@@ -1,22 +1,24 @@
-use log::*;
-use solana_bench_exchange::bench::{airdrop_lamports, do_bench_exchange, Config};
-use solana_core::validator::ValidatorConfig;
-use solana_exchange_program::{
+use {
+    log::*,
+    solana_bench_exchange::bench::{airdrop_lamports, do_bench_exchange, Config},
+    solana_core::validator::ValidatorConfig,
+    solana_exchange_program::{
         exchange_processor::process_instruction, id, solana_exchange_program,
-};
-use solana_faucet::faucet::run_local_faucet_with_port;
-use solana_gossip::gossip_service::{discover_cluster, get_multi_client};
-use solana_local_cluster::{
+    },
+    solana_faucet::faucet::run_local_faucet_with_port,
+    solana_gossip::gossip_service::{discover_cluster, get_multi_client},
+    solana_local_cluster::{
         local_cluster::{ClusterConfig, LocalCluster},
         validator_configs::make_identical_validator_configs,
-};
-use solana_runtime::{bank::Bank, bank_client::BankClient};
-use solana_sdk::{
+    },
+    solana_runtime::{bank::Bank, bank_client::BankClient},
+    solana_sdk::{
         genesis_config::create_genesis_config,
         signature::{Keypair, Signer},
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    std::{process::exit, sync::mpsc::channel, time::Duration},
 };
-use solana_streamer::socket::SocketAddrSpace;
-use std::{process::exit, sync::mpsc::channel, time::Duration};
 
 #[test]
 #[ignore]

bench-streamer/src/main.rs

@@ -1,16 +1,22 @@
 #![allow(clippy::integer_arithmetic)]
-use clap::{crate_description, crate_name, App, Arg};
-use solana_streamer::packet::{Packet, Packets, PacketsRecycler, PACKET_DATA_SIZE};
-use solana_streamer::streamer::{receiver, PacketReceiver};
-use std::cmp::max;
-use std::net::{IpAddr, Ipv4Addr, SocketAddr, UdpSocket};
-use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
-use std::sync::mpsc::channel;
-use std::sync::Arc;
-use std::thread::sleep;
-use std::thread::{spawn, JoinHandle, Result};
-use std::time::Duration;
-use std::time::SystemTime;
+use {
+    clap::{crate_description, crate_name, App, Arg},
+    solana_streamer::{
+        packet::{Packet, Packets, PacketsRecycler, PACKET_DATA_SIZE},
+        streamer::{receiver, PacketReceiver},
+    },
+    std::{
+        cmp::max,
+        net::{IpAddr, Ipv4Addr, SocketAddr, UdpSocket},
+        sync::{
+            atomic::{AtomicBool, AtomicUsize, Ordering},
+            mpsc::channel,
+            Arc,
+        },
+        thread::{sleep, spawn, JoinHandle, Result},
+        time::{Duration, SystemTime},
+    },
+};
 
 fn producer(addr: &SocketAddr, exit: Arc<AtomicBool>) -> JoinHandle<()> {
     let send = UdpSocket::bind("0.0.0.0:0").unwrap();

bench-tps/src/bench.rs

@@ -1,12 +1,13 @@
-use crate::cli::Config;
-use log::*;
-use rayon::prelude::*;
-use solana_client::perf_utils::{sample_txs, SampleStats};
-use solana_core::gen_keys::GenKeys;
-use solana_faucet::faucet::request_airdrop_transaction;
-use solana_measure::measure::Measure;
-use solana_metrics::{self, datapoint_info};
-use solana_sdk::{
+use {
+    crate::cli::Config,
+    log::*,
+    rayon::prelude::*,
+    solana_client::perf_utils::{sample_txs, SampleStats},
+    solana_core::gen_keys::GenKeys,
+    solana_faucet::faucet::request_airdrop_transaction,
+    solana_measure::measure::Measure,
+    solana_metrics::{self, datapoint_info},
+    solana_sdk::{
         client::Client,
         clock::{DEFAULT_S_PER_SLOT, MAX_PROCESSING_AGE},
         commitment_config::CommitmentConfig,
@@ -18,8 +19,8 @@ use solana_sdk::{
         system_instruction, system_transaction,
         timing::{duration_as_ms, duration_as_s, duration_as_us, timestamp},
         transaction::Transaction,
-};
-use std::{
+    },
+    std::{
         collections::{HashSet, VecDeque},
         net::SocketAddr,
         process::exit,
@@ -29,6 +30,7 @@ use std::{
         },
         thread::{sleep, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 // The point at which transactions become "too old", in seconds.
@@ -924,12 +926,14 @@ pub fn generate_and_fund_keypairs<T: 'static + Client + Send + Sync>(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_runtime::bank::Bank;
-    use solana_runtime::bank_client::BankClient;
-    use solana_sdk::client::SyncClient;
-    use solana_sdk::fee_calculator::FeeRateGovernor;
-    use solana_sdk::genesis_config::create_genesis_config;
+    use {
+        super::*,
+        solana_runtime::{bank::Bank, bank_client::BankClient},
+        solana_sdk::{
+            client::SyncClient, fee_calculator::FeeRateGovernor,
+            genesis_config::create_genesis_config,
+        },
+    };
 
     #[test]
     fn test_bench_tps_bank_client() {

bench-tps/src/cli.rs

@@ -1,11 +1,13 @@
-use clap::{crate_description, crate_name, App, Arg, ArgMatches};
-use solana_faucet::faucet::FAUCET_PORT;
-use solana_sdk::fee_calculator::FeeRateGovernor;
-use solana_sdk::{
+use {
+    clap::{crate_description, crate_name, App, Arg, ArgMatches},
+    solana_faucet::faucet::FAUCET_PORT,
+    solana_sdk::{
+        fee_calculator::FeeRateGovernor,
         pubkey::Pubkey,
         signature::{read_keypair_file, Keypair},
+    },
+    std::{net::SocketAddr, process::exit, time::Duration},
 };
-use std::{net::SocketAddr, process::exit, time::Duration};
 
 const NUM_LAMPORTS_PER_ACCOUNT_DEFAULT: u64 = solana_sdk::native_token::LAMPORTS_PER_SOL;
 

bench-tps/src/main.rs

@@ -1,14 +1,20 @@
 #![allow(clippy::integer_arithmetic)]
-use log::*;
-use solana_bench_tps::bench::{do_bench_tps, generate_and_fund_keypairs, generate_keypairs};
-use solana_bench_tps::cli;
-use solana_genesis::Base64Account;
-use solana_gossip::gossip_service::{discover_cluster, get_client, get_multi_client};
-use solana_sdk::fee_calculator::FeeRateGovernor;
-use solana_sdk::signature::{Keypair, Signer};
-use solana_sdk::system_program;
-use solana_streamer::socket::SocketAddrSpace;
-use std::{collections::HashMap, fs::File, io::prelude::*, path::Path, process::exit, sync::Arc};
+use {
+    log::*,
+    solana_bench_tps::{
+        bench::{do_bench_tps, generate_and_fund_keypairs, generate_keypairs},
+        cli,
+    },
+    solana_genesis::Base64Account,
+    solana_gossip::gossip_service::{discover_cluster, get_client, get_multi_client},
+    solana_sdk::{
+        fee_calculator::FeeRateGovernor,
+        signature::{Keypair, Signer},
+        system_program,
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    std::{collections::HashMap, fs::File, io::prelude::*, path::Path, process::exit, sync::Arc},
+};
 
 /// Number of signatures for all transactions in ~1 week at ~100K TPS
 pub const NUM_SIGNATURES_FOR_TXS: u64 = 100_000 * 60 * 60 * 24 * 7;

bench-tps/tests/bench_tps.rs

@@ -1,22 +1,24 @@
 #![allow(clippy::integer_arithmetic)]
-use serial_test::serial;
-use solana_bench_tps::{
+use {
+    serial_test::serial,
+    solana_bench_tps::{
         bench::{do_bench_tps, generate_and_fund_keypairs},
         cli::Config,
-};
-use solana_client::thin_client::create_client;
-use solana_core::validator::ValidatorConfig;
-use solana_faucet::faucet::run_local_faucet_with_port;
-use solana_gossip::cluster_info::VALIDATOR_PORT_RANGE;
-use solana_local_cluster::{
+    },
+    solana_client::thin_client::create_client,
+    solana_core::validator::ValidatorConfig,
+    solana_faucet::faucet::run_local_faucet_with_port,
+    solana_gossip::cluster_info::VALIDATOR_PORT_RANGE,
+    solana_local_cluster::{
         local_cluster::{ClusterConfig, LocalCluster},
         validator_configs::make_identical_validator_configs,
-};
-use solana_sdk::signature::{Keypair, Signer};
-use solana_streamer::socket::SocketAddrSpace;
-use std::{
+    },
+    solana_sdk::signature::{Keypair, Signer},
+    solana_streamer::socket::SocketAddrSpace,
+    std::{
         sync::{mpsc::channel, Arc},
         time::Duration,
+    },
 };
 
 fn test_bench_tps_local_cluster(config: Config) {

clap-utils/src/input_parsers.rs

@@ -196,10 +196,12 @@ pub fn commitment_of(matches: &ArgMatches<'_>, name: &str) -> Option<CommitmentC
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use clap::{App, Arg};
-    use solana_sdk::signature::write_keypair_file;
-    use std::fs;
+    use {
+        super::*,
+        clap::{App, Arg},
+        solana_sdk::signature::write_keypair_file,
+        std::fs,
+    };
 
     fn app<'ab, 'v>() -> App<'ab, 'v> {
         App::new("test")

clap-utils/src/input_validators.rs

@@ -7,8 +7,7 @@ use {
         pubkey::{Pubkey, MAX_SEED_LEN},
         signature::{read_keypair_file, Signature},
     },
-    std::fmt::Display,
-    std::str::FromStr,
+    std::{fmt::Display, str::FromStr},
 };
 
 fn is_parsable_generic<U, T>(string: T) -> Result<(), String>

clap-utils/src/keypair.rs

@@ -1123,14 +1123,14 @@ fn sanitize_seed_phrase(seed_phrase: &str) -> String {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::offline::OfflineArgs;
-    use clap::{value_t_or_exit, App, Arg};
-    use solana_remote_wallet::locator::Manufacturer;
-    use solana_remote_wallet::remote_wallet::initialize_wallet_manager;
-    use solana_sdk::signer::keypair::write_keypair_file;
-    use solana_sdk::system_instruction;
-    use tempfile::{NamedTempFile, TempDir};
+    use {
+        super::*,
+        crate::offline::OfflineArgs,
+        clap::{value_t_or_exit, App, Arg},
+        solana_remote_wallet::{locator::Manufacturer, remote_wallet::initialize_wallet_manager},
+        solana_sdk::{signer::keypair::write_keypair_file, system_instruction},
+        tempfile::{NamedTempFile, TempDir},
+    };
 
     #[test]
     fn test_sanitize_seed_phrase() {

cli-config/src/config.rs

@@ -1,7 +1,9 @@
 // Wallet settings that can be configured for long-term use
-use serde_derive::{Deserialize, Serialize};
-use std::{collections::HashMap, io, path::Path};
-use url::Url;
+use {
+    serde_derive::{Deserialize, Serialize},
+    std::{collections::HashMap, io, path::Path},
+    url::Url,
+};
 
 lazy_static! {
     pub static ref CONFIG_FILE: Option<String> = {

cli-config/src/lib.rs

@@ -3,7 +3,6 @@ extern crate lazy_static;
 
 mod config;
 pub use config::{Config, CONFIG_FILE};
-
 use std::{
     fs::{create_dir_all, File},
     io::{self, Write},

cli-output/src/cli_output.rs

@@ -2525,14 +2525,16 @@ impl VerboseDisplay for CliGossipNodes {}
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use clap::{App, Arg};
-    use solana_sdk::{
+    use {
+        super::*,
+        clap::{App, Arg},
+        solana_sdk::{
             message::Message,
             pubkey::Pubkey,
             signature::{keypair_from_seed, NullSigner, Signature, Signer, SignerError},
             system_instruction,
             transaction::Transaction,
+        },
     };
 
     #[test]

cli-output/src/display.rs

@@ -8,8 +8,7 @@ use {
         program_utils::limited_deserialize, pubkey::Pubkey, stake, transaction::Transaction,
     },
     solana_transaction_status::UiTransactionStatusMeta,
-    spl_memo::id as spl_memo_id,
-    spl_memo::v1::id as spl_memo_v1_id,
+    spl_memo::{id as spl_memo_id, v1::id as spl_memo_v1_id},
     std::{collections::HashMap, fmt, io},
 };
 
@@ -431,8 +430,7 @@ pub fn unix_timestamp_to_string(unix_timestamp: UnixTimestamp) -> String {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_sdk::pubkey::Pubkey;
+    use {super::*, solana_sdk::pubkey::Pubkey};
 
     #[test]
     fn test_format_labeled_address() {

cli/src/checks.rs

@@ -1,11 +1,13 @@
-use crate::cli::CliError;
-use solana_client::{
+use {
+    crate::cli::CliError,
+    solana_client::{
         client_error::{ClientError, Result as ClientResult},
         rpc_client::RpcClient,
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         commitment_config::CommitmentConfig, fee_calculator::FeeCalculator, message::Message,
         native_token::lamports_to_sol, pubkey::Pubkey,
+    },
 };
 
 pub fn check_account_for_fee(
@@ -149,14 +151,16 @@ pub fn check_unique_pubkeys(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use serde_json::json;
-    use solana_client::{
+    use {
+        super::*,
+        serde_json::json,
+        solana_client::{
             rpc_request::RpcRequest,
             rpc_response::{Response, RpcResponseContext},
+        },
+        solana_sdk::system_instruction,
+        std::collections::HashMap,
     };
-    use solana_sdk::system_instruction;
-    use std::collections::HashMap;
 
     #[test]
     fn test_check_account_for_fees() {

cli/src/clap_app.rs

@@ -1,10 +1,12 @@
-use crate::{
+use {
+    crate::{
         cli::*, cluster_query::*, feature::*, inflation::*, nonce::*, program::*, stake::*,
         validator_info::*, vote::*, wallet::*,
+    },
+    clap::{App, AppSettings, Arg, ArgGroup, SubCommand},
+    solana_clap_utils::{self, input_validators::*, keypair::*},
+    solana_cli_config::CONFIG_FILE,
 };
-use clap::{App, AppSettings, Arg, ArgGroup, SubCommand};
-use solana_clap_utils::{self, input_validators::*, keypair::*};
-use solana_cli_config::CONFIG_FILE;
 
 pub fn get_clap_app<'ab, 'v>(name: &str, about: &'ab str, version: &'v str) -> App<'ab, 'v> {
     App::new(name)

cli/src/cli.rs

@@ -1,24 +1,27 @@
-use crate::{
-    clap_app::*, cluster_query::*, feature::*, inflation::*, nonce::*, program::*, spend_utils::*,
-    stake::*, validator_info::*, vote::*, wallet::*,
-};
-use clap::{crate_description, crate_name, value_t_or_exit, ArgMatches, Shell};
-use log::*;
-use num_traits::FromPrimitive;
-use serde_json::{self, Value};
-use solana_clap_utils::{self, input_parsers::*, input_validators::*, keypair::*};
-use solana_cli_output::{
+use {
+    crate::{
+        clap_app::*, cluster_query::*, feature::*, inflation::*, nonce::*, program::*,
+        spend_utils::*, stake::*, validator_info::*, vote::*, wallet::*,
+    },
+    clap::{crate_description, crate_name, value_t_or_exit, ArgMatches, Shell},
+    log::*,
+    num_traits::FromPrimitive,
+    serde_json::{self, Value},
+    solana_clap_utils::{self, input_parsers::*, input_validators::*, keypair::*},
+    solana_cli_output::{
         display::println_name_value, CliSignature, CliValidatorsSortOrder, OutputFormat,
-};
-use solana_client::{
+    },
+    solana_client::{
         blockhash_query::BlockhashQuery,
         client_error::{ClientError, Result as ClientResult},
         nonce_utils,
         rpc_client::RpcClient,
-    rpc_config::{RpcLargestAccountsFilter, RpcSendTransactionConfig, RpcTransactionLogsFilter},
-};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+        rpc_config::{
+            RpcLargestAccountsFilter, RpcSendTransactionConfig, RpcTransactionLogsFilter,
+        },
+    },
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         clock::{Epoch, Slot},
         commitment_config::CommitmentConfig,
         decode_error::DecodeError,
@@ -28,10 +31,11 @@ use solana_sdk::{
         signature::{Signature, Signer, SignerError},
         stake::{instruction::LockupArgs, state::Lockup},
         transaction::{Transaction, TransactionError},
+    },
+    solana_vote_program::vote_state::VoteAuthorize,
+    std::{collections::HashMap, error, io::stdout, str::FromStr, sync::Arc, time::Duration},
+    thiserror::Error,
 };
-use solana_vote_program::vote_state::VoteAuthorize;
-use std::{collections::HashMap, error, io::stdout, str::FromStr, sync::Arc, time::Duration};
-use thiserror::Error;
 
 pub const DEFAULT_RPC_TIMEOUT_SECONDS: &str = "30";
 pub const DEFAULT_CONFIRM_TX_TIMEOUT_SECONDS: &str = "5";
@@ -1585,22 +1589,26 @@ where
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use serde_json::{json, Value};
-    use solana_client::{
+    use {
+        super::*,
+        serde_json::{json, Value},
+        solana_client::{
             blockhash_query,
             mock_sender::SIGNATURE,
             rpc_request::RpcRequest,
             rpc_response::{Response, RpcResponseContext},
-    };
-    use solana_sdk::{
+        },
+        solana_sdk::{
             pubkey::Pubkey,
-        signature::{keypair_from_seed, read_keypair_file, write_keypair_file, Keypair, Presigner},
+            signature::{
+                keypair_from_seed, read_keypair_file, write_keypair_file, Keypair, Presigner,
+            },
             stake, system_program,
             transaction::TransactionError,
+        },
+        solana_transaction_status::TransactionConfirmationStatus,
+        std::path::PathBuf,
     };
-    use solana_transaction_status::TransactionConfirmationStatus;
-    use std::path::PathBuf;
 
     fn make_tmp_path(name: &str) -> String {
         let out_dir = std::env::var("FARF_DIR").unwrap_or_else(|_| "farf".to_string());

cli/src/cluster_query.rs

@@ -1,38 +1,39 @@
-use crate::{
+use {
+    crate::{
         cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult},
         spend_utils::{resolve_spend_tx_and_check_account_balance, SpendAmount},
-};
-use clap::{value_t, value_t_or_exit, App, AppSettings, Arg, ArgMatches, SubCommand};
-use console::{style, Emoji};
-use serde::{Deserialize, Serialize};
-use solana_clap_utils::{
+    },
+    clap::{value_t, value_t_or_exit, App, AppSettings, Arg, ArgMatches, SubCommand},
+    console::{style, Emoji},
+    serde::{Deserialize, Serialize},
+    solana_clap_utils::{
         input_parsers::*,
         input_validators::*,
         keypair::DefaultSigner,
         offline::{blockhash_arg, BLOCKHASH_ARG},
-};
-use solana_cli_output::{
+    },
+    solana_cli_output::{
         display::{
             build_balance_message, format_labeled_address, new_spinner_progress_bar,
             println_name_value, println_transaction, unix_timestamp_to_string, writeln_name_value,
         },
         *,
-};
-use solana_client::{
+    },
+    solana_client::{
         client_error::ClientErrorKind,
         pubsub_client::PubsubClient,
         rpc_client::{GetConfirmedSignaturesForAddress2Config, RpcClient},
         rpc_config::{
-        RpcAccountInfoConfig, RpcBlockConfig, RpcGetVoteAccountsConfig, RpcLargestAccountsConfig,
-        RpcLargestAccountsFilter, RpcProgramAccountsConfig, RpcTransactionConfig,
-        RpcTransactionLogsConfig, RpcTransactionLogsFilter,
+            RpcAccountInfoConfig, RpcBlockConfig, RpcGetVoteAccountsConfig,
+            RpcLargestAccountsConfig, RpcLargestAccountsFilter, RpcProgramAccountsConfig,
+            RpcTransactionConfig, RpcTransactionLogsConfig, RpcTransactionLogsFilter,
         },
         rpc_filter,
         rpc_request::DELINQUENT_VALIDATOR_SLOT_DISTANCE,
         rpc_response::SlotInfo,
-};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::from_account,
         account_utils::StateMut,
         clock::{self, Clock, Slot},
@@ -56,10 +57,10 @@ use solana_sdk::{
         },
         timing,
         transaction::Transaction,
-};
-use solana_transaction_status::UiTransactionEncoding;
-use solana_vote_program::vote_state::VoteState;
-use std::{
+    },
+    solana_transaction_status::UiTransactionEncoding,
+    solana_vote_program::vote_state::VoteState,
+    std::{
         collections::{BTreeMap, HashMap, VecDeque},
         fmt,
         str::FromStr,
@@ -69,8 +70,9 @@ use std::{
         },
         thread::sleep,
         time::{Duration, Instant, SystemTime, UNIX_EPOCH},
+    },
+    thiserror::Error,
 };
-use thiserror::Error;
 
 static CHECK_MARK: Emoji = Emoji("✅ ", "");
 static CROSS_MARK: Emoji = Emoji("❌ ", "");
@@ -2140,11 +2142,13 @@ pub fn process_calculate_rent(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{clap_app::get_clap_app, cli::parse_command};
-    use solana_sdk::signature::{write_keypair, Keypair};
-    use std::str::FromStr;
-    use tempfile::NamedTempFile;
+    use {
+        super::*,
+        crate::{clap_app::get_clap_app, cli::parse_command},
+        solana_sdk::signature::{write_keypair, Keypair},
+        std::str::FromStr,
+        tempfile::NamedTempFile,
+    };
 
     fn make_tmp_file() -> (String, NamedTempFile) {
         let tmp_file = NamedTempFile::new().unwrap();

cli/src/feature.rs

@@ -1,15 +1,16 @@
-use crate::{
+use {
+    crate::{
         cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult},
         spend_utils::{resolve_spend_tx_and_check_account_balance, SpendAmount},
-};
-use clap::{App, AppSettings, Arg, ArgMatches, SubCommand};
-use console::style;
-use serde::{Deserialize, Serialize};
-use solana_clap_utils::{input_parsers::*, input_validators::*, keypair::*};
-use solana_cli_output::{QuietDisplay, VerboseDisplay};
-use solana_client::{client_error::ClientError, rpc_client::RpcClient};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    clap::{App, AppSettings, Arg, ArgMatches, SubCommand},
+    console::style,
+    serde::{Deserialize, Serialize},
+    solana_clap_utils::{input_parsers::*, input_validators::*, keypair::*},
+    solana_cli_output::{QuietDisplay, VerboseDisplay},
+    solana_client::{client_error::ClientError, rpc_client::RpcClient},
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::Account,
         clock::Slot,
         feature::{self, Feature},
@@ -17,12 +18,13 @@ use solana_sdk::{
         message::Message,
         pubkey::Pubkey,
         transaction::Transaction,
-};
-use std::{
+    },
+    std::{
         cmp::Ordering,
         collections::{HashMap, HashSet},
         fmt,
         sync::Arc,
+    },
 };
 
 #[derive(Copy, Clone, Debug, PartialEq)]

cli/src/inflation.rs

@@ -1,17 +1,19 @@
-use crate::cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult};
-use clap::{App, Arg, ArgMatches, SubCommand};
-use solana_clap_utils::{
+use {
+    crate::cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult},
+    clap::{App, Arg, ArgMatches, SubCommand},
+    solana_clap_utils::{
         input_parsers::{pubkeys_of, value_of},
         input_validators::is_valid_pubkey,
         keypair::*,
-};
-use solana_cli_output::{
+    },
+    solana_cli_output::{
         CliEpochRewardshMetadata, CliInflation, CliKeyedEpochReward, CliKeyedEpochRewards,
+    },
+    solana_client::rpc_client::RpcClient,
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{clock::Epoch, pubkey::Pubkey},
+    std::sync::Arc,
 };
-use solana_client::rpc_client::RpcClient;
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{clock::Epoch, pubkey::Pubkey};
-use std::sync::Arc;
 
 #[derive(Debug, PartialEq)]
 pub enum InflationCliCommand {

cli/src/main.rs

@@ -1,19 +1,21 @@
-use clap::{crate_description, crate_name, value_t_or_exit, ArgMatches};
-use console::style;
-use solana_clap_utils::{
+use {
+    clap::{crate_description, crate_name, value_t_or_exit, ArgMatches},
+    console::style,
+    solana_clap_utils::{
         input_validators::normalize_to_url_if_moniker,
         keypair::{CliSigners, DefaultSigner},
         DisplayError,
-};
-use solana_cli::{
+    },
+    solana_cli::{
         clap_app::get_clap_app,
         cli::{parse_command, process_command, CliCommandInfo, CliConfig, SettingType},
+    },
+    solana_cli_config::Config,
+    solana_cli_output::{display::println_name_value, OutputFormat},
+    solana_client::rpc_config::RpcSendTransactionConfig,
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    std::{collections::HashMap, error, path::PathBuf, sync::Arc, time::Duration},
 };
-use solana_cli_config::Config;
-use solana_cli_output::{display::println_name_value, OutputFormat};
-use solana_client::rpc_config::RpcSendTransactionConfig;
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use std::{collections::HashMap, error, path::PathBuf, sync::Arc, time::Duration};
 
 pub fn println_name_value_or(name: &str, value: &str, setting_type: SettingType) {
     let description = match setting_type {

cli/src/memo.rs

@@ -1,6 +1,7 @@
-use solana_sdk::instruction::Instruction;
-use solana_sdk::pubkey::Pubkey;
-use spl_memo::id;
+use {
+    solana_sdk::{instruction::Instruction, pubkey::Pubkey},
+    spl_memo::id,
+};
 
 pub trait WithMemo {
     fn with_memo<T: AsRef<str>>(self, memo: Option<T>) -> Self;

cli/src/nonce.rs

@@ -1,25 +1,26 @@
-use crate::{
+use {
+    crate::{
         checks::{check_account_for_fee_with_commitment, check_unique_pubkeys},
         cli::{
-        log_instruction_custom_error, log_instruction_custom_error_ex, CliCommand, CliCommandInfo,
-        CliConfig, CliError, ProcessResult,
+            log_instruction_custom_error, log_instruction_custom_error_ex, CliCommand,
+            CliCommandInfo, CliConfig, CliError, ProcessResult,
         },
         feature::get_feature_is_active,
         memo::WithMemo,
         spend_utils::{resolve_spend_tx_and_check_account_balance, SpendAmount},
-};
-use clap::{App, Arg, ArgMatches, SubCommand};
-use solana_clap_utils::{
+    },
+    clap::{App, Arg, ArgMatches, SubCommand},
+    solana_clap_utils::{
         input_parsers::*,
         input_validators::*,
         keypair::{DefaultSigner, SignerIndex},
         memo::{memo_arg, MEMO_ARG},
         nonce::*,
-};
-use solana_cli_output::CliNonceAccount;
-use solana_client::{nonce_utils::*, rpc_client::RpcClient};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_cli_output::CliNonceAccount,
+    solana_client::{nonce_utils::*, rpc_client::RpcClient},
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::Account,
         feature_set::merge_nonce_error_into_system_error,
         hash::Hash,
@@ -34,8 +35,9 @@ use solana_sdk::{
         },
         system_program,
         transaction::{Transaction, TransactionError},
+    },
+    std::sync::Arc,
 };
-use std::sync::Arc;
 
 pub trait NonceSubCommands {
     fn nonce_subcommands(self) -> Self;
@@ -650,9 +652,10 @@ pub fn process_withdraw_from_nonce_account(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{clap_app::get_clap_app, cli::parse_command};
-    use solana_sdk::{
+    use {
+        super::*,
+        crate::{clap_app::get_clap_app, cli::parse_command},
+        solana_sdk::{
             account::Account,
             account_utils::StateMut,
             fee_calculator::FeeCalculator,
@@ -661,8 +664,9 @@ mod tests {
             nonce_account,
             signature::{read_keypair_file, write_keypair, Keypair, Signer},
             system_program,
+        },
+        tempfile::NamedTempFile,
     };
-    use tempfile::NamedTempFile;
 
     fn make_tmp_file() -> (String, NamedTempFile) {
         let tmp_file = NamedTempFile::new().unwrap();

cli/src/program.rs

@@ -1,38 +1,37 @@
-use crate::{
+use {
+    crate::{
         checks::*,
         cli::{
             log_instruction_custom_error, CliCommand, CliCommandInfo, CliConfig, CliError,
             ProcessResult,
         },
-};
-use bip39::{Language, Mnemonic, MnemonicType, Seed};
-use clap::{App, AppSettings, Arg, ArgMatches, SubCommand};
-use log::*;
-use solana_account_decoder::{UiAccountEncoding, UiDataSliceConfig};
-use solana_bpf_loader_program::{bpf_verifier, BpfError, ThisInstructionMeter};
-use solana_clap_utils::{self, input_parsers::*, input_validators::*, keypair::*};
-use solana_cli_output::{
+    },
+    bip39::{Language, Mnemonic, MnemonicType, Seed},
+    clap::{App, AppSettings, Arg, ArgMatches, SubCommand},
+    log::*,
+    solana_account_decoder::{UiAccountEncoding, UiDataSliceConfig},
+    solana_bpf_loader_program::{bpf_verifier, BpfError, ThisInstructionMeter},
+    solana_clap_utils::{self, input_parsers::*, input_validators::*, keypair::*},
+    solana_cli_output::{
         CliProgram, CliProgramAccountType, CliProgramAuthority, CliProgramBuffer, CliProgramId,
         CliUpgradeableBuffer, CliUpgradeableBuffers, CliUpgradeableProgram,
         CliUpgradeableProgramClosed, CliUpgradeablePrograms,
-};
-use solana_client::{
+    },
+    solana_client::{
         client_error::ClientErrorKind,
         rpc_client::RpcClient,
-    rpc_config::RpcSendTransactionConfig,
-    rpc_config::{RpcAccountInfoConfig, RpcProgramAccountsConfig},
+        rpc_config::{RpcAccountInfoConfig, RpcProgramAccountsConfig, RpcSendTransactionConfig},
         rpc_filter::{Memcmp, MemcmpEncodedBytes, RpcFilterType},
         tpu_client::{TpuClient, TpuClientConfig},
-};
-use solana_rbpf::vm::{Config, Executable};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_rbpf::vm::{Config, Executable},
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::Account,
         account_utils::StateMut,
         bpf_loader, bpf_loader_deprecated,
         bpf_loader_upgradeable::{self, UpgradeableLoaderState},
-    instruction::Instruction,
-    instruction::InstructionError,
+        instruction::{Instruction, InstructionError},
         loader_instruction,
         message::Message,
         native_token::Sol,
@@ -41,16 +40,16 @@ use solana_sdk::{
         signature::{keypair_from_seed, read_keypair_file, Keypair, Signature, Signer},
         system_instruction::{self, SystemError},
         system_program,
-    transaction::Transaction,
-    transaction::TransactionError,
-};
-use std::{
+        transaction::{Transaction, TransactionError},
+    },
+    std::{
         fs::File,
         io::{Read, Write},
         mem::size_of,
         path::PathBuf,
         str::FromStr,
         sync::Arc,
+    },
 };
 
 #[derive(Debug, PartialEq)]
@@ -2192,14 +2191,16 @@ fn report_ephemeral_mnemonic(words: usize, mnemonic: bip39::Mnemonic) {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{
+    use {
+        super::*,
+        crate::{
             clap_app::get_clap_app,
             cli::{parse_command, process_command},
+        },
+        serde_json::Value,
+        solana_cli_output::OutputFormat,
+        solana_sdk::signature::write_keypair_file,
     };
-    use serde_json::Value;
-    use solana_cli_output::OutputFormat;
-    use solana_sdk::signature::write_keypair_file;
 
     fn make_tmp_path(name: &str) -> String {
         let out_dir = std::env::var("FARF_DIR").unwrap_or_else(|_| "farf".to_string());

cli/src/spend_utils.rs

@@ -1,13 +1,15 @@
-use crate::{
+use {
+    crate::{
         checks::{calculate_fee, check_account_for_balance_with_commitment},
         cli::CliError,
-};
-use clap::ArgMatches;
-use solana_clap_utils::{input_parsers::lamports_of_sol, offline::SIGN_ONLY_ARG};
-use solana_client::rpc_client::RpcClient;
-use solana_sdk::{
+    },
+    clap::ArgMatches,
+    solana_clap_utils::{input_parsers::lamports_of_sol, offline::SIGN_ONLY_ARG},
+    solana_client::rpc_client::RpcClient,
+    solana_sdk::{
         commitment_config::CommitmentConfig, fee_calculator::FeeCalculator, message::Message,
         native_token::lamports_to_sol, pubkey::Pubkey,
+    },
 };
 
 #[derive(Debug, PartialEq, Clone, Copy)]

cli/src/stake.rs

@@ -1,4 +1,5 @@
-use crate::{
+use {
+    crate::{
         checks::{check_account_for_fee_with_commitment, check_unique_pubkeys},
         cli::{
             log_instruction_custom_error, CliCommand, CliCommandInfo, CliConfig, CliError,
@@ -7,9 +8,9 @@ use crate::{
         memo::WithMemo,
         nonce::check_nonce_account,
         spend_utils::{resolve_spend_tx_and_check_account_balances, SpendAmount},
-};
-use clap::{value_t, App, Arg, ArgGroup, ArgMatches, SubCommand};
-use solana_clap_utils::{
+    },
+    clap::{value_t, App, Arg, ArgGroup, ArgMatches, SubCommand},
+    solana_clap_utils::{
         fee_payer::{fee_payer_arg, FEE_PAYER_ARG},
         input_parsers::*,
         input_validators::*,
@@ -18,17 +19,17 @@ use solana_clap_utils::{
         nonce::*,
         offline::*,
         ArgConstant,
-};
-use solana_cli_output::{
+    },
+    solana_cli_output::{
         return_signers_with_config, CliEpochReward, CliStakeHistory, CliStakeHistoryEntry,
         CliStakeState, CliStakeType, OutputFormat, ReturnSignersConfig,
-};
-use solana_client::{
+    },
+    solana_client::{
         blockhash_query::BlockhashQuery, nonce_utils, rpc_client::RpcClient,
         rpc_request::DELINQUENT_VALIDATOR_SLOT_DISTANCE, rpc_response::RpcInflationReward,
-};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::from_account,
         account_utils::StateMut,
         clock::{Clock, UnixTimestamp, SECONDS_PER_DAY},
@@ -45,9 +46,10 @@ use solana_sdk::{
         system_instruction::SystemError,
         sysvar::{clock, stake_history},
         transaction::Transaction,
+    },
+    solana_vote_program::vote_state::VoteState,
+    std::{ops::Deref, sync::Arc},
 };
-use solana_vote_program::vote_state::VoteState;
-use std::{ops::Deref, sync::Arc};
 
 pub const STAKE_AUTHORITY_ARG: ArgConstant<'static> = ArgConstant {
     name: "stake_authority",
@@ -2438,16 +2440,18 @@ pub fn process_delegate_stake(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{clap_app::get_clap_app, cli::parse_command};
-    use solana_client::blockhash_query;
-    use solana_sdk::{
+    use {
+        super::*,
+        crate::{clap_app::get_clap_app, cli::parse_command},
+        solana_client::blockhash_query,
+        solana_sdk::{
             hash::Hash,
             signature::{
                 keypair_from_seed, read_keypair_file, write_keypair, Keypair, Presigner, Signer,
             },
+        },
+        tempfile::NamedTempFile,
     };
-    use tempfile::NamedTempFile;
 
     fn make_tmp_file() -> (String, NamedTempFile) {
         let tmp_file = NamedTempFile::new().unwrap();

cli/src/test_utils.rs

@@ -1,6 +1,8 @@
-use solana_client::rpc_client::RpcClient;
-use solana_sdk::{clock::DEFAULT_MS_PER_SLOT, commitment_config::CommitmentConfig, pubkey::Pubkey};
-use std::{thread::sleep, time::Duration};
+use {
+    solana_client::rpc_client::RpcClient,
+    solana_sdk::{clock::DEFAULT_MS_PER_SLOT, commitment_config::CommitmentConfig, pubkey::Pubkey},
+    std::{thread::sleep, time::Duration},
+};
 
 pub fn check_recent_balance(expected_balance: u64, client: &RpcClient, pubkey: &Pubkey) {
     (0..5).for_each(|tries| {

cli/src/validator_info.rs

@@ -1,31 +1,33 @@
-use crate::{
+use {
+    crate::{
         cli::{CliCommand, CliCommandInfo, CliConfig, CliError, ProcessResult},
         spend_utils::{resolve_spend_tx_and_check_account_balance, SpendAmount},
-};
-use bincode::deserialize;
-use clap::{App, AppSettings, Arg, ArgMatches, SubCommand};
-use reqwest::blocking::Client;
-use serde_json::{Map, Value};
-use solana_account_decoder::validator_info::{
+    },
+    bincode::deserialize,
+    clap::{App, AppSettings, Arg, ArgMatches, SubCommand},
+    reqwest::blocking::Client,
+    serde_json::{Map, Value},
+    solana_account_decoder::validator_info::{
         self, ValidatorInfo, MAX_LONG_FIELD_LENGTH, MAX_SHORT_FIELD_LENGTH,
-};
-use solana_clap_utils::{
+    },
+    solana_clap_utils::{
         input_parsers::pubkey_of,
         input_validators::{is_pubkey, is_url},
         keypair::DefaultSigner,
-};
-use solana_cli_output::{CliValidatorInfo, CliValidatorInfoVec};
-use solana_client::rpc_client::RpcClient;
-use solana_config_program::{config_instruction, get_config_data, ConfigKeys, ConfigState};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_cli_output::{CliValidatorInfo, CliValidatorInfoVec},
+    solana_client::rpc_client::RpcClient,
+    solana_config_program::{config_instruction, get_config_data, ConfigKeys, ConfigState},
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::Account,
         message::Message,
         pubkey::Pubkey,
         signature::{Keypair, Signer},
         transaction::Transaction,
+    },
+    std::{error, sync::Arc},
 };
-use std::{error, sync::Arc};
 
 // Return an error if a validator details are longer than the max length.
 pub fn check_details_length(string: String) -> Result<(), String> {
@@ -407,10 +409,12 @@ pub fn process_get_validator_info(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::clap_app::get_clap_app;
-    use bincode::{serialize, serialized_size};
-    use serde_json::json;
+    use {
+        super::*,
+        crate::clap_app::get_clap_app,
+        bincode::{serialize, serialized_size},
+        serde_json::json,
+    };
 
     #[test]
     fn test_check_url() {

cli/src/vote.rs

@@ -1,4 +1,5 @@
-use crate::{
+use {
+    crate::{
         checks::{check_account_for_fee_with_commitment, check_unique_pubkeys},
         cli::{
             log_instruction_custom_error, CliCommand, CliCommandInfo, CliConfig, CliError,
@@ -7,27 +8,28 @@ use crate::{
         memo::WithMemo,
         spend_utils::{resolve_spend_tx_and_check_account_balance, SpendAmount},
         stake::check_current_authority,
-};
-use clap::{value_t_or_exit, App, Arg, ArgMatches, SubCommand};
-use solana_clap_utils::{
+    },
+    clap::{value_t_or_exit, App, Arg, ArgMatches, SubCommand},
+    solana_clap_utils::{
         input_parsers::*,
         input_validators::*,
         keypair::{DefaultSigner, SignerIndex},
         memo::{memo_arg, MEMO_ARG},
-};
-use solana_cli_output::{CliEpochVotingHistory, CliLockout, CliVoteAccount};
-use solana_client::rpc_client::RpcClient;
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_cli_output::{CliEpochVotingHistory, CliLockout, CliVoteAccount},
+    solana_client::rpc_client::RpcClient,
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         account::Account, commitment_config::CommitmentConfig, message::Message,
         native_token::lamports_to_sol, pubkey::Pubkey, system_instruction::SystemError,
         transaction::Transaction,
-};
-use solana_vote_program::{
+    },
+    solana_vote_program::{
         vote_instruction::{self, withdraw, VoteError},
         vote_state::{VoteAuthorize, VoteInit, VoteState},
+    },
+    std::sync::Arc,
 };
-use std::sync::Arc;
 
 pub trait VoteSubCommands {
     fn vote_subcommands(self) -> Self;
@@ -937,10 +939,12 @@ pub fn process_withdraw_from_vote_account(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{clap_app::get_clap_app, cli::parse_command};
-    use solana_sdk::signature::{read_keypair_file, write_keypair, Keypair, Signer};
-    use tempfile::NamedTempFile;
+    use {
+        super::*,
+        crate::{clap_app::get_clap_app, cli::parse_command},
+        solana_sdk::signature::{read_keypair_file, write_keypair, Keypair, Signer},
+        tempfile::NamedTempFile,
+    };
 
     fn make_tmp_file() -> (String, NamedTempFile) {
         let tmp_file = NamedTempFile::new().unwrap();

cli/src/wallet.rs

@@ -1,4 +1,5 @@
-use crate::{
+use {
+    crate::{
         cli::{
             log_instruction_custom_error, request_and_confirm_airdrop, CliCommand, CliCommandInfo,
             CliConfig, CliError, ProcessResult,
@@ -6,10 +7,10 @@ use crate::{
         memo::WithMemo,
         nonce::check_nonce_account,
         spend_utils::{resolve_spend_tx_and_check_account_balances, SpendAmount},
-};
-use clap::{value_t_or_exit, App, Arg, ArgMatches, SubCommand};
-use solana_account_decoder::{UiAccount, UiAccountEncoding};
-use solana_clap_utils::{
+    },
+    clap::{value_t_or_exit, App, Arg, ArgMatches, SubCommand},
+    solana_account_decoder::{UiAccount, UiAccountEncoding},
+    solana_clap_utils::{
         fee_payer::*,
         input_parsers::*,
         input_validators::*,
@@ -17,18 +18,18 @@ use solana_clap_utils::{
         memo::*,
         nonce::*,
         offline::*,
-};
-use solana_cli_output::{
+    },
+    solana_cli_output::{
         display::build_balance_message, return_signers_with_config, CliAccount,
         CliSignatureVerificationStatus, CliTransaction, CliTransactionConfirmation, OutputFormat,
         ReturnSignersConfig,
-};
-use solana_client::{
+    },
+    solana_client::{
         blockhash_query::BlockhashQuery, nonce_utils, rpc_client::RpcClient,
         rpc_config::RpcTransactionConfig, rpc_response::RpcKeyedAccount,
-};
-use solana_remote_wallet::remote_wallet::RemoteWalletManager;
-use solana_sdk::{
+    },
+    solana_remote_wallet::remote_wallet::RemoteWalletManager,
+    solana_sdk::{
         commitment_config::CommitmentConfig,
         message::Message,
         pubkey::Pubkey,
@@ -37,9 +38,10 @@ use solana_sdk::{
         system_instruction::{self, SystemError},
         system_program,
         transaction::Transaction,
+    },
+    solana_transaction_status::{EncodedTransaction, UiTransactionEncoding},
+    std::{fmt::Write as FmtWrite, fs::File, io::Write, sync::Arc},
 };
-use solana_transaction_status::{EncodedTransaction, UiTransactionEncoding};
-use std::{fmt::Write as FmtWrite, fs::File, io::Write, sync::Arc};
 
 pub trait WalletSubCommands {
     fn wallet_subcommands(self) -> Self;

cli/tests/nonce.rs

@@ -1,24 +1,26 @@
-use solana_cli::{
+use {
+    solana_cli::{
         cli::{process_command, request_and_confirm_airdrop, CliCommand, CliConfig},
         spend_utils::SpendAmount,
         test_utils::{check_ready, check_recent_balance},
-};
-use solana_cli_output::{parse_sign_only_reply_string, OutputFormat};
-use solana_client::{
+    },
+    solana_cli_output::{parse_sign_only_reply_string, OutputFormat},
+    solana_client::{
         blockhash_query::{self, BlockhashQuery},
         nonce_utils,
         rpc_client::RpcClient,
-};
-use solana_core::test_validator::TestValidator;
-use solana_faucet::faucet::run_local_faucet;
-use solana_sdk::{
+    },
+    solana_core::test_validator::TestValidator,
+    solana_faucet::faucet::run_local_faucet,
+    solana_sdk::{
         commitment_config::CommitmentConfig,
         hash::Hash,
         pubkey::Pubkey,
         signature::{keypair_from_seed, Keypair, Signer},
         system_program,
+    },
+    solana_streamer::socket::SocketAddrSpace,
 };
-use solana_streamer::socket::SocketAddrSpace;
 
 #[test]
 fn test_nonce() {

cli/tests/program.rs

@@ -1,22 +1,24 @@
-use serde_json::Value;
-use solana_cli::{
+use {
+    serde_json::Value,
+    solana_cli::{
         cli::{process_command, CliCommand, CliConfig},
         program::ProgramCliCommand,
-};
-use solana_cli_output::OutputFormat;
-use solana_client::rpc_client::RpcClient;
-use solana_core::test_validator::TestValidator;
-use solana_faucet::faucet::run_local_faucet;
-use solana_sdk::{
+    },
+    solana_cli_output::OutputFormat,
+    solana_client::rpc_client::RpcClient,
+    solana_core::test_validator::TestValidator,
+    solana_faucet::faucet::run_local_faucet,
+    solana_sdk::{
         account_utils::StateMut,
         bpf_loader,
         bpf_loader_upgradeable::{self, UpgradeableLoaderState},
         commitment_config::CommitmentConfig,
         pubkey::Pubkey,
         signature::{Keypair, Signer},
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    std::{env, fs::File, io::Read, path::PathBuf, str::FromStr},
 };
-use solana_streamer::socket::SocketAddrSpace;
-use std::{env, fs::File, io::Read, path::PathBuf, str::FromStr};
 
 #[test]
 fn test_cli_program_deploy_non_upgradeable() {

cli/tests/request_airdrop.rs

@@ -1,12 +1,14 @@
-use solana_cli::cli::{process_command, CliCommand, CliConfig};
-use solana_client::rpc_client::RpcClient;
-use solana_core::test_validator::TestValidator;
-use solana_faucet::faucet::run_local_faucet;
-use solana_sdk::{
+use {
+    solana_cli::cli::{process_command, CliCommand, CliConfig},
+    solana_client::rpc_client::RpcClient,
+    solana_core::test_validator::TestValidator,
+    solana_faucet::faucet::run_local_faucet,
+    solana_sdk::{
         commitment_config::CommitmentConfig,
         signature::{Keypair, Signer},
+    },
+    solana_streamer::socket::SocketAddrSpace,
 };
-use solana_streamer::socket::SocketAddrSpace;
 
 #[test]
 fn test_cli_request_airdrop() {

cli/tests/stake.rs

@@ -1,18 +1,19 @@
-use solana_cli::{
+use {
+    solana_cli::{
         cli::{process_command, request_and_confirm_airdrop, CliCommand, CliConfig},
         spend_utils::SpendAmount,
         stake::StakeAuthorizationIndexed,
         test_utils::{check_ready, check_recent_balance},
-};
-use solana_cli_output::{parse_sign_only_reply_string, OutputFormat};
-use solana_client::{
+    },
+    solana_cli_output::{parse_sign_only_reply_string, OutputFormat},
+    solana_client::{
         blockhash_query::{self, BlockhashQuery},
         nonce_utils,
         rpc_client::RpcClient,
-};
-use solana_core::test_validator::TestValidator;
-use solana_faucet::faucet::run_local_faucet;
-use solana_sdk::{
+    },
+    solana_core::test_validator::TestValidator,
+    solana_faucet::faucet::run_local_faucet,
+    solana_sdk::{
         account_utils::StateMut,
         commitment_config::CommitmentConfig,
         nonce::State as NonceState,
@@ -23,8 +24,9 @@ use solana_sdk::{
             instruction::LockupArgs,
             state::{Lockup, StakeAuthorize, StakeState},
         },
+    },
+    solana_streamer::socket::SocketAddrSpace,
 };
-use solana_streamer::socket::SocketAddrSpace;
 
 #[test]
 fn test_stake_delegation_force() {

cli/tests/transfer.rs

@@ -1,24 +1,26 @@
-use solana_cli::{
+use {
+    solana_cli::{
         cli::{process_command, request_and_confirm_airdrop, CliCommand, CliConfig},
         spend_utils::SpendAmount,
         test_utils::{check_ready, check_recent_balance},
-};
-use solana_cli_output::{parse_sign_only_reply_string, OutputFormat};
-use solana_client::{
+    },
+    solana_cli_output::{parse_sign_only_reply_string, OutputFormat},
+    solana_client::{
         blockhash_query::{self, BlockhashQuery},
         nonce_utils,
         rpc_client::RpcClient,
-};
-use solana_core::test_validator::TestValidator;
-use solana_faucet::faucet::run_local_faucet;
-use solana_sdk::{
+    },
+    solana_core::test_validator::TestValidator,
+    solana_faucet::faucet::run_local_faucet,
+    solana_sdk::{
         commitment_config::CommitmentConfig,
         nonce::State as NonceState,
         pubkey::Pubkey,
         signature::{keypair_from_seed, Keypair, NullSigner, Signer},
         stake,
+    },
+    solana_streamer::socket::SocketAddrSpace,
 };
-use solana_streamer::socket::SocketAddrSpace;
 
 #[test]
 fn test_transfer() {

cli/tests/vote.rs

@@ -1,21 +1,23 @@
-use solana_cli::{
+use {
+    solana_cli::{
         cli::{process_command, request_and_confirm_airdrop, CliCommand, CliConfig},
         spend_utils::SpendAmount,
         test_utils::check_recent_balance,
-};
-use solana_client::{
+    },
+    solana_client::{
         blockhash_query::{self, BlockhashQuery},
         rpc_client::RpcClient,
-};
-use solana_core::test_validator::TestValidator;
-use solana_faucet::faucet::run_local_faucet;
-use solana_sdk::{
+    },
+    solana_core::test_validator::TestValidator,
+    solana_faucet::faucet::run_local_faucet,
+    solana_sdk::{
         account_utils::StateMut,
         commitment_config::CommitmentConfig,
         signature::{Keypair, Signer},
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    solana_vote_program::vote_state::{VoteAuthorize, VoteState, VoteStateVersions},
 };
-use solana_streamer::socket::SocketAddrSpace;
-use solana_vote_program::vote_state::{VoteAuthorize, VoteState, VoteStateVersions};
 
 #[test]
 fn test_vote_authorize_and_withdraw() {

client/src/blockhash_query.rs

@@ -118,17 +118,19 @@ impl Default for BlockhashQuery {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{
+    use {
+        super::*,
+        crate::{
             blockhash_query,
             rpc_request::RpcRequest,
             rpc_response::{Response, RpcFeeCalculator, RpcFees, RpcResponseContext},
+        },
+        clap::App,
+        serde_json::{self, json},
+        solana_account_decoder::{UiAccount, UiAccountEncoding},
+        solana_sdk::{account::Account, hash::hash, nonce, system_program},
+        std::collections::HashMap,
     };
-    use clap::App;
-    use serde_json::{self, json};
-    use solana_account_decoder::{UiAccount, UiAccountEncoding};
-    use solana_sdk::{account::Account, hash::hash, nonce, system_program};
-    use std::collections::HashMap;
 
     #[test]
     fn test_blockhash_query_new_ok() {

client/src/client_error.rs

@@ -1,3 +1,4 @@
+pub use reqwest;
 use {
     crate::{rpc_request, rpc_response},
     solana_faucet::faucet::FaucetError,
@@ -6,9 +7,7 @@ use {
     },
     std::io,
     thiserror::Error,
-};
-
-pub use reqwest; // export `reqwest` for clients
+}; // export `reqwest` for clients
 
 #[derive(Error, Debug)]
 pub enum ClientErrorKind {

client/src/rpc_client.rs

@@ -16,8 +16,7 @@ use {
         client_error::{ClientError, ClientErrorKind, Result as ClientResult},
         http_sender::HttpSender,
         mock_sender::{MockSender, Mocks},
-        rpc_config::RpcAccountInfoConfig,
-        rpc_config::*,
+        rpc_config::{RpcAccountInfoConfig, *},
         rpc_request::{RpcError, RpcRequest, RpcResponseErrorData, TokenAccountsFilter},
         rpc_response::*,
         rpc_sender::*,
@@ -4784,19 +4783,21 @@ pub fn create_rpc_client_mocks() -> crate::mock_sender::Mocks {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{client_error::ClientErrorKind, mock_sender::PUBKEY};
-    use assert_matches::assert_matches;
-    use jsonrpc_core::{futures::prelude::*, Error, IoHandler, Params};
-    use jsonrpc_http_server::{AccessControlAllowOrigin, DomainsValidation, ServerBuilder};
-    use serde_json::Number;
-    use solana_sdk::{
+    use {
+        super::*,
+        crate::{client_error::ClientErrorKind, mock_sender::PUBKEY},
+        assert_matches::assert_matches,
+        jsonrpc_core::{futures::prelude::*, Error, IoHandler, Params},
+        jsonrpc_http_server::{AccessControlAllowOrigin, DomainsValidation, ServerBuilder},
+        serde_json::Number,
+        solana_sdk::{
             instruction::InstructionError,
             signature::{Keypair, Signer},
             system_transaction,
             transaction::TransactionError,
+        },
+        std::{io, sync::mpsc::channel, thread},
     };
-    use std::{io, sync::mpsc::channel, thread};
 
     #[test]
     fn test_send() {

client/src/rpc_custom_error.rs

@@ -1,9 +1,9 @@
 //! Implementation defined RPC server errors
-use thiserror::Error;
 use {
     crate::rpc_response::RpcSimulateTransactionResult,
     jsonrpc_core::{Error, ErrorCode},
     solana_sdk::clock::Slot,
+    thiserror::Error,
 };
 
 pub const JSON_RPC_SERVER_ERROR_BLOCK_CLEANED_UP: i64 = -32001;

client/src/rpc_request.rs

@@ -241,9 +241,11 @@ pub enum TokenAccountsFilter {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::rpc_config::RpcTokenAccountsFilter;
-    use solana_sdk::commitment_config::{CommitmentConfig, CommitmentLevel};
+    use {
+        super::*,
+        crate::rpc_config::RpcTokenAccountsFilter,
+        solana_sdk::commitment_config::{CommitmentConfig, CommitmentLevel},
+    };
 
     #[test]
     fn test_build_request_json() {

client/src/thin_client.rs

@@ -622,8 +622,7 @@ pub fn create_client_with_timeout(
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use rayon::prelude::*;
+    use {super::*, rayon::prelude::*};
 
     #[test]
     fn test_client_optimizer() {

client/src/tpu_client.rs

@@ -1,14 +1,15 @@
-use crate::{
+use {
+    crate::{
         client_error::ClientError,
         pubsub_client::{PubsubClient, PubsubClientError, PubsubClientSubscription},
         rpc_client::RpcClient,
         rpc_request::MAX_GET_SIGNATURE_STATUSES_QUERY_ITEMS,
         rpc_response::{Fees, SlotUpdate},
         spinner,
-};
-use bincode::serialize;
-use log::*;
-use solana_sdk::{
+    },
+    bincode::serialize,
+    log::*,
+    solana_sdk::{
         clock::Slot,
         commitment_config::CommitmentConfig,
         message::Message,
@@ -16,8 +17,8 @@ use solana_sdk::{
         signature::SignerError,
         signers::Signers,
         transaction::{Transaction, TransactionError},
-};
-use std::{
+    },
+    std::{
         collections::{HashMap, HashSet, VecDeque},
         net::{SocketAddr, UdpSocket},
         str::FromStr,
@@ -27,8 +28,9 @@ use std::{
         },
         thread::{sleep, JoinHandle},
         time::{Duration, Instant},
+    },
+    thiserror::Error,
 };
-use thiserror::Error;
 
 #[derive(Error, Debug)]
 pub enum TpuSenderError {

core/benches/banking_stage.rs

@@ -3,40 +3,41 @@
 
 extern crate test;
 
-use crossbeam_channel::unbounded;
-use log::*;
-use rand::{thread_rng, Rng};
-use rayon::prelude::*;
-use solana_core::banking_stage::{BankingStage, BankingStageStats};
-use solana_gossip::cluster_info::ClusterInfo;
-use solana_gossip::cluster_info::Node;
-use solana_ledger::blockstore_processor::process_entries;
-use solana_ledger::entry::{next_hash, Entry};
-use solana_ledger::genesis_utils::{create_genesis_config, GenesisConfigInfo};
-use solana_ledger::{blockstore::Blockstore, get_tmp_ledger_path};
-use solana_perf::packet::to_packets_chunked;
-use solana_perf::test_tx::test_tx;
-use solana_poh::poh_recorder::{create_test_recorder, WorkingBankEntry};
-use solana_runtime::bank::Bank;
-use solana_runtime::cost_model::CostModel;
-use solana_sdk::genesis_config::GenesisConfig;
-use solana_sdk::hash::Hash;
-use solana_sdk::message::Message;
-use solana_sdk::pubkey;
-use solana_sdk::signature::Keypair;
-use solana_sdk::signature::Signature;
-use solana_sdk::signature::Signer;
-use solana_sdk::system_instruction;
-use solana_sdk::system_transaction;
-use solana_sdk::timing::{duration_as_us, timestamp};
-use solana_sdk::transaction::Transaction;
-use solana_streamer::socket::SocketAddrSpace;
-use std::collections::VecDeque;
-use std::sync::atomic::Ordering;
-use std::sync::mpsc::Receiver;
-use std::sync::{Arc, RwLock};
-use std::time::{Duration, Instant};
-use test::Bencher;
+use {
+    crossbeam_channel::unbounded,
+    log::*,
+    rand::{thread_rng, Rng},
+    rayon::prelude::*,
+    solana_core::banking_stage::{BankingStage, BankingStageStats},
+    solana_gossip::cluster_info::{ClusterInfo, Node},
+    solana_ledger::{
+        blockstore::Blockstore,
+        blockstore_processor::process_entries,
+        entry::{next_hash, Entry},
+        genesis_utils::{create_genesis_config, GenesisConfigInfo},
+        get_tmp_ledger_path,
+    },
+    solana_perf::{packet::to_packets_chunked, test_tx::test_tx},
+    solana_poh::poh_recorder::{create_test_recorder, WorkingBankEntry},
+    solana_runtime::{bank::Bank, cost_model::CostModel},
+    solana_sdk::{
+        genesis_config::GenesisConfig,
+        hash::Hash,
+        message::Message,
+        pubkey,
+        signature::{Keypair, Signature, Signer},
+        system_instruction, system_transaction,
+        timing::{duration_as_us, timestamp},
+        transaction::Transaction,
+    },
+    solana_streamer::socket::SocketAddrSpace,
+    std::{
+        collections::VecDeque,
+        sync::{atomic::Ordering, mpsc::Receiver, Arc, RwLock},
+        time::{Duration, Instant},
+    },
+    test::Bencher,
+};
 
 fn check_txs(receiver: &Arc<Receiver<WorkingBankEntry>>, ref_tx_count: usize) {
     let mut total = 0;

core/benches/blockstore.rs

@@ -3,15 +3,17 @@
 extern crate solana_ledger;
 extern crate test;
 
-use rand::Rng;
-use solana_ledger::{
+use {
+    rand::Rng,
+    solana_ledger::{
         blockstore::{entries_to_test_shreds, Blockstore},
         entry::{create_ticks, Entry},
         get_tmp_ledger_path,
+    },
+    solana_sdk::{clock::Slot, hash::Hash},
+    std::path::Path,
+    test::Bencher,
 };
-use solana_sdk::{clock::Slot, hash::Hash};
-use std::path::Path;
-use test::Bencher;
 
 // Given some shreds and a ledger at ledger_path, benchmark writing the shreds to the ledger
 fn bench_write_shreds(bench: &mut Bencher, entries: Vec<Entry>, ledger_path: &Path) {

core/benches/consensus.rs

@@ -3,16 +3,17 @@
 extern crate solana_core;
 extern crate test;
 
-use solana_core::consensus::Tower;
-use solana_runtime::bank::Bank;
-use solana_runtime::bank_forks::BankForks;
-use solana_sdk::{
+use {
+    solana_core::consensus::Tower,
+    solana_runtime::{bank::Bank, bank_forks::BankForks},
+    solana_sdk::{
         pubkey::Pubkey,
         signature::{Keypair, Signer},
+    },
+    std::sync::Arc,
+    tempfile::TempDir,
+    test::Bencher,
 };
-use std::sync::Arc;
-use tempfile::TempDir;
-use test::Bencher;
 
 #[bench]
 fn bench_save_tower(bench: &mut Bencher) {

core/benches/gen_keys.rs

@@ -2,8 +2,7 @@
 
 extern crate test;
 
-use solana_core::gen_keys::GenKeys;
-use test::Bencher;
+use {solana_core::gen_keys::GenKeys, test::Bencher};
 
 #[bench]
 fn bench_gen_keys(b: &mut Bencher) {

core/benches/shredder.rs

@@ -3,19 +3,22 @@
 
 extern crate test;
 
-use rand::seq::SliceRandom;
-use raptorq::{Decoder, Encoder};
-use solana_ledger::entry::{create_ticks, Entry};
-use solana_ledger::shred::{
+use {
+    rand::seq::SliceRandom,
+    raptorq::{Decoder, Encoder},
+    solana_ledger::{
+        entry::{create_ticks, Entry},
+        shred::{
             max_entries_per_n_shred, max_ticks_per_n_shreds, ProcessShredsStats, Shred, Shredder,
             MAX_DATA_SHREDS_PER_FEC_BLOCK, SHRED_PAYLOAD_SIZE, SIZE_OF_CODING_SHRED_HEADERS,
             SIZE_OF_DATA_SHRED_PAYLOAD,
+        },
+    },
+    solana_perf::test_tx,
+    solana_sdk::{hash::Hash, signature::Keypair},
+    std::sync::Arc,
+    test::Bencher,
 };
-use solana_perf::test_tx;
-use solana_sdk::hash::Hash;
-use solana_sdk::signature::Keypair;
-use std::sync::Arc;
-use test::Bencher;
 
 fn make_test_entry(txs_per_entry: u64) -> Entry {
     Entry {

core/benches/sigverify_stage.rs

@@ -3,20 +3,24 @@
 extern crate solana_core;
 extern crate test;
 
-use crossbeam_channel::unbounded;
-use log::*;
-use rand::{thread_rng, Rng};
-use solana_core::sigverify::TransactionSigVerifier;
-use solana_core::sigverify_stage::SigVerifyStage;
-use solana_perf::packet::to_packets_chunked;
-use solana_perf::test_tx::test_tx;
-use solana_sdk::hash::Hash;
-use solana_sdk::signature::{Keypair, Signer};
-use solana_sdk::system_transaction;
-use solana_sdk::timing::duration_as_ms;
-use std::sync::mpsc::channel;
-use std::time::{Duration, Instant};
-use test::Bencher;
+use {
+    crossbeam_channel::unbounded,
+    log::*,
+    rand::{thread_rng, Rng},
+    solana_core::{sigverify::TransactionSigVerifier, sigverify_stage::SigVerifyStage},
+    solana_perf::{packet::to_packets_chunked, test_tx::test_tx},
+    solana_sdk::{
+        hash::Hash,
+        signature::{Keypair, Signer},
+        system_transaction,
+        timing::duration_as_ms,
+    },
+    std::{
+        sync::mpsc::channel,
+        time::{Duration, Instant},
+    },
+    test::Bencher,
+};
 
 #[bench]
 fn bench_packet_discard(bencher: &mut Bencher) {

core/src/accounts_hash_verifier.rs

@@ -4,16 +4,17 @@
 // hash on gossip. Monitor gossip for messages from validators in the `--known-validator`s
 // set and halt the node if a mismatch is detected.
 
-use crate::snapshot_packager_service::PendingSnapshotPackage;
-use rayon::ThreadPool;
-use solana_gossip::cluster_info::{ClusterInfo, MAX_SNAPSHOT_HASHES};
-use solana_runtime::{
+use {
+    crate::snapshot_packager_service::PendingSnapshotPackage,
+    rayon::ThreadPool,
+    solana_gossip::cluster_info::{ClusterInfo, MAX_SNAPSHOT_HASHES},
+    solana_runtime::{
         accounts_db,
         snapshot_package::{AccountsPackage, AccountsPackagePre, AccountsPackageReceiver},
-};
-use solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey};
-use std::collections::{HashMap, HashSet};
-use std::{
+    },
+    solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey},
+    std::{
+        collections::{HashMap, HashSet},
         sync::{
             atomic::{AtomicBool, Ordering},
             mpsc::RecvTimeoutError,
@@ -21,6 +22,7 @@ use std::{
         },
         thread::{self, Builder, JoinHandle},
         time::Duration,
+    },
 };
 
 pub struct AccountsHashVerifier {
@@ -129,8 +131,10 @@ impl AccountsHashVerifier {
             && accounts_package.slot % fault_injection_rate_slots == 0
         {
             // For testing, publish an invalid hash to gossip.
-            use rand::{thread_rng, Rng};
-            use solana_sdk::hash::extend_and_hash;
+            use {
+                rand::{thread_rng, Rng},
+                solana_sdk::hash::extend_and_hash,
+            };
             warn!("inserting fault at slot: {}", accounts_package.slot);
             let rand = thread_rng().gen_range(0, 10);
             let hash = extend_and_hash(&hash, &[rand]);
@@ -215,15 +219,16 @@ impl AccountsHashVerifier {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_gossip::{cluster_info::make_accounts_hashes_message, contact_info::ContactInfo};
-    use solana_runtime::bank_forks::ArchiveFormat;
-    use solana_runtime::snapshot_utils::SnapshotVersion;
-    use solana_sdk::{
+    use {
+        super::*,
+        solana_gossip::{cluster_info::make_accounts_hashes_message, contact_info::ContactInfo},
+        solana_runtime::{bank_forks::ArchiveFormat, snapshot_utils::SnapshotVersion},
+        solana_sdk::{
             hash::hash,
             signature::{Keypair, Signer},
+        },
+        solana_streamer::socket::SocketAddrSpace,
     };
-    use solana_streamer::socket::SocketAddrSpace;
 
     fn new_test_cluster_info(contact_info: ContactInfo) -> ClusterInfo {
         ClusterInfo::new(
@@ -269,8 +274,7 @@ mod tests {
     #[test]
     fn test_max_hashes() {
         solana_logger::setup();
-        use std::path::PathBuf;
-        use tempfile::TempDir;
+        use {std::path::PathBuf, tempfile::TempDir};
         let keypair = Keypair::new();
 
         let contact_info = ContactInfo::new_localhost(&keypair.pubkey(), 0);

core/src/banking_stage.rs

@@ -1,23 +1,24 @@
 //! The `banking_stage` processes Transaction messages. It is intended to be used
 //! to contruct a software pipeline. The stage uses all available CPU cores and
 //! can do its processing in parallel with signature verification on the GPU.
-use crate::packet_hasher::PacketHasher;
-use crossbeam_channel::{Receiver as CrossbeamReceiver, RecvTimeoutError};
-use itertools::Itertools;
-use lru::LruCache;
-use retain_mut::RetainMut;
-use solana_gossip::{cluster_info::ClusterInfo, contact_info::ContactInfo};
-use solana_ledger::{blockstore_processor::TransactionStatusSender, entry::hash_transactions};
-use solana_measure::measure::Measure;
-use solana_metrics::{inc_new_counter_debug, inc_new_counter_info};
-use solana_perf::{
+use {
+    crate::packet_hasher::PacketHasher,
+    crossbeam_channel::{Receiver as CrossbeamReceiver, RecvTimeoutError},
+    itertools::Itertools,
+    lru::LruCache,
+    retain_mut::RetainMut,
+    solana_gossip::{cluster_info::ClusterInfo, contact_info::ContactInfo},
+    solana_ledger::{blockstore_processor::TransactionStatusSender, entry::hash_transactions},
+    solana_measure::measure::Measure,
+    solana_metrics::{inc_new_counter_debug, inc_new_counter_info},
+    solana_perf::{
         cuda_runtime::PinnedVec,
         data_budget::DataBudget,
         packet::{limited_deserialize, Packet, Packets, PACKETS_PER_BATCH},
         perf_libs,
-};
-use solana_poh::poh_recorder::{PohRecorder, PohRecorderError, TransactionRecorder};
-use solana_runtime::{
+    },
+    solana_poh::poh_recorder::{PohRecorder, PohRecorderError, TransactionRecorder},
+    solana_runtime::{
         accounts_db::ErrorCounters,
         bank::{
             Bank, ExecuteTimings, TransactionBalancesSet, TransactionCheckResult,
@@ -29,8 +30,8 @@ use solana_runtime::{
         hashed_transaction::HashedTransaction,
         transaction_batch::TransactionBatch,
         vote_sender_types::ReplayVoteSender,
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         clock::{
             Slot, DEFAULT_TICKS_PER_SLOT, MAX_PROCESSING_AGE, MAX_TRANSACTION_FORWARDING_DELAY,
             MAX_TRANSACTION_FORWARDING_DELAY_GPU,
@@ -42,11 +43,11 @@ use solana_sdk::{
         signature::Signature,
         timing::{duration_as_ms, timestamp, AtomicInterval},
         transaction::{self, Transaction, TransactionError},
-};
-use solana_transaction_status::token_balances::{
+    },
+    solana_transaction_status::token_balances::{
         collect_token_balances, TransactionTokenBalancesSet,
-};
-use std::{
+    },
+    std::{
         borrow::Cow,
         cmp,
         collections::{HashMap, VecDeque},
@@ -54,11 +55,13 @@ use std::{
         mem::size_of,
         net::{SocketAddr, UdpSocket},
         ops::DerefMut,
-    sync::atomic::{AtomicU64, AtomicUsize, Ordering},
-    sync::{Arc, Mutex, RwLock, RwLockReadGuard},
+        sync::{
+            atomic::{AtomicU64, AtomicUsize, Ordering},
+            Arc, Mutex, RwLock, RwLockReadGuard,
+        },
         thread::{self, Builder, JoinHandle},
-    time::Duration,
-    time::Instant,
+        time::{Duration, Instant},
+    },
 };
 
 /// (packets, valid_indexes, forwarded)
@@ -1660,25 +1663,26 @@ where
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crossbeam_channel::unbounded;
-    use itertools::Itertools;
-    use solana_gossip::{cluster_info::Node, contact_info::ContactInfo};
-    use solana_ledger::{
+    use {
+        super::*,
+        crossbeam_channel::unbounded,
+        itertools::Itertools,
+        solana_gossip::{cluster_info::Node, contact_info::ContactInfo},
+        solana_ledger::{
             blockstore::{entries_to_test_shreds, Blockstore},
             entry::{next_entry, Entry, EntrySlice},
             genesis_utils::{create_genesis_config, GenesisConfigInfo},
             get_tmp_ledger_path,
             leader_schedule_cache::LeaderScheduleCache,
-    };
-    use solana_perf::packet::to_packets_chunked;
-    use solana_poh::{
+        },
+        solana_perf::packet::to_packets_chunked,
+        solana_poh::{
             poh_recorder::{create_test_recorder, Record, WorkingBank, WorkingBankEntry},
             poh_service::PohService,
-    };
-    use solana_rpc::transaction_status_service::TransactionStatusService;
-    use solana_runtime::cost_model::CostModel;
-    use solana_sdk::{
+        },
+        solana_rpc::transaction_status_service::TransactionStatusService,
+        solana_runtime::cost_model::CostModel,
+        solana_sdk::{
             hash::Hash,
             instruction::InstructionError,
             poh_config::PohConfig,
@@ -1686,11 +1690,11 @@ mod tests {
             system_instruction::SystemError,
             system_transaction,
             transaction::TransactionError,
-    };
-    use solana_streamer::socket::SocketAddrSpace;
-    use solana_transaction_status::TransactionWithStatusMeta;
-    use solana_vote_program::vote_transaction;
-    use std::{
+        },
+        solana_streamer::socket::SocketAddrSpace,
+        solana_transaction_status::TransactionWithStatusMeta,
+        solana_vote_program::vote_transaction,
+        std::{
             net::SocketAddr,
             path::Path,
             sync::{
@@ -1698,6 +1702,7 @@ mod tests {
                 mpsc::Receiver,
             },
             thread::sleep,
+        },
     };
 
     fn new_test_cluster_info(contact_info: ContactInfo) -> ClusterInfo {

core/src/broadcast_stage.rs

@@ -23,8 +23,9 @@ use {
     solana_poh::poh_recorder::WorkingBankEntry,
     solana_runtime::{bank::Bank, bank_forks::BankForks},
     solana_sdk::{
+        clock::Slot,
+        pubkey::Pubkey,
         timing::{timestamp, AtomicInterval},
-        {clock::Slot, pubkey::Pubkey},
     },
     solana_streamer::{
         sendmmsg::{batch_send, SendPktsError},
@@ -449,24 +450,28 @@ pub fn broadcast_shreds(
 
 #[cfg(test)]
 pub mod test {
-    use super::*;
-    use crossbeam_channel::unbounded;
-    use solana_gossip::cluster_info::{ClusterInfo, Node};
-    use solana_ledger::{
+    use {
+        super::*,
+        crossbeam_channel::unbounded,
+        solana_gossip::cluster_info::{ClusterInfo, Node},
+        solana_ledger::{
             blockstore::{make_slot_entries, Blockstore},
             entry::create_ticks,
             genesis_utils::{create_genesis_config, GenesisConfigInfo},
             get_tmp_ledger_path,
             shred::{max_ticks_per_n_shreds, ProcessShredsStats, Shredder},
-    };
-    use solana_runtime::bank::Bank;
-    use solana_sdk::{
+        },
+        solana_runtime::bank::Bank,
+        solana_sdk::{
             hash::Hash,
             pubkey::Pubkey,
             signature::{Keypair, Signer},
-    };
-    use std::{
-        path::Path, sync::atomic::AtomicBool, sync::mpsc::channel, sync::Arc, thread::sleep,
+        },
+        std::{
+            path::Path,
+            sync::{atomic::AtomicBool, mpsc::channel, Arc},
+            thread::sleep,
+        },
     };
 
     #[allow(clippy::implicit_hasher)]

core/src/broadcast_stage/broadcast_fake_shreds_run.rs

@@ -1,8 +1,8 @@
-use super::*;
-use solana_ledger::entry::Entry;
-use solana_ledger::shred::Shredder;
-use solana_sdk::hash::Hash;
-use solana_sdk::signature::Keypair;
+use {
+    super::*,
+    solana_ledger::{entry::Entry, shred::Shredder},
+    solana_sdk::{hash::Hash, signature::Keypair},
+};
 
 #[derive(Clone)]
 pub(super) struct BroadcastFakeShredsRun {
@@ -139,10 +139,12 @@ impl BroadcastRun for BroadcastFakeShredsRun {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_gossip::contact_info::ContactInfo;
-    use solana_streamer::socket::SocketAddrSpace;
-    use std::net::{IpAddr, Ipv4Addr, SocketAddr};
+    use {
+        super::*,
+        solana_gossip::contact_info::ContactInfo,
+        solana_streamer::socket::SocketAddrSpace,
+        std::net::{IpAddr, Ipv4Addr, SocketAddr},
+    };
 
     #[test]
     fn test_tvu_peers_ordering() {

core/src/broadcast_stage/broadcast_utils.rs

@@ -1,12 +1,13 @@
-use crate::result::Result;
-use solana_ledger::{entry::Entry, shred::Shred};
-use solana_poh::poh_recorder::WorkingBankEntry;
-use solana_runtime::bank::Bank;
-use solana_sdk::clock::Slot;
-use std::{
-    sync::mpsc::Receiver,
-    sync::Arc,
+use {
+    crate::result::Result,
+    solana_ledger::{entry::Entry, shred::Shred},
+    solana_poh::poh_recorder::WorkingBankEntry,
+    solana_runtime::bank::Bank,
+    solana_sdk::clock::Slot,
+    std::{
+        sync::{mpsc::Receiver, Arc},
         time::{Duration, Instant},
+    },
 };
 
 pub(super) struct ReceiveResults {
@@ -79,13 +80,15 @@ pub(super) fn recv_slot_entries(receiver: &Receiver<WorkingBankEntry>) -> Result
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_ledger::genesis_utils::{create_genesis_config, GenesisConfigInfo};
-    use solana_sdk::genesis_config::GenesisConfig;
-    use solana_sdk::pubkey::Pubkey;
-    use solana_sdk::system_transaction;
-    use solana_sdk::transaction::Transaction;
-    use std::sync::mpsc::channel;
+    use {
+        super::*,
+        solana_ledger::genesis_utils::{create_genesis_config, GenesisConfigInfo},
+        solana_sdk::{
+            genesis_config::GenesisConfig, pubkey::Pubkey, system_transaction,
+            transaction::Transaction,
+        },
+        std::sync::mpsc::channel,
+    };
 
     fn setup_test() -> (GenesisConfig, Arc<Bank>, Transaction) {
         let GenesisConfigInfo {

core/src/broadcast_stage/standard_broadcast_run.rs

@@ -511,21 +511,21 @@ impl BroadcastRun for StandardBroadcastRun {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_gossip::cluster_info::{ClusterInfo, Node};
-    use solana_ledger::genesis_utils::create_genesis_config;
-    use solana_ledger::{
-        blockstore::Blockstore, entry::create_ticks, get_tmp_ledger_path,
-        shred::max_ticks_per_n_shreds,
-    };
-    use solana_runtime::bank::Bank;
-    use solana_sdk::{
+    use {
+        super::*,
+        solana_gossip::cluster_info::{ClusterInfo, Node},
+        solana_ledger::{
+            blockstore::Blockstore, entry::create_ticks, genesis_utils::create_genesis_config,
+            get_tmp_ledger_path, shred::max_ticks_per_n_shreds,
+        },
+        solana_runtime::bank::Bank,
+        solana_sdk::{
             genesis_config::GenesisConfig,
             signature::{Keypair, Signer},
+        },
+        solana_streamer::socket::SocketAddrSpace,
+        std::{sync::Arc, time::Duration},
     };
-    use solana_streamer::socket::SocketAddrSpace;
-    use std::sync::Arc;
-    use std::time::Duration;
 
     #[allow(clippy::type_complexity)]
     fn setup(

core/src/cluster_info_vote_listener.rs

@@ -1,53 +1,56 @@
-use crate::{
+use {
+    crate::{
         optimistic_confirmation_verifier::OptimisticConfirmationVerifier,
         replay_stage::DUPLICATE_THRESHOLD,
         result::{Error, Result},
         sigverify,
         verified_vote_packets::VerifiedVotePackets,
         vote_stake_tracker::VoteStakeTracker,
-};
-use crossbeam_channel::{
-    unbounded, Receiver as CrossbeamReceiver, RecvTimeoutError, Select, Sender as CrossbeamSender,
-};
-use itertools::izip;
-use log::*;
-use solana_gossip::{
+    },
+    crossbeam_channel::{
+        unbounded, Receiver as CrossbeamReceiver, RecvTimeoutError, Select,
+        Sender as CrossbeamSender,
+    },
+    itertools::izip,
+    log::*,
+    solana_gossip::{
         cluster_info::{ClusterInfo, GOSSIP_SLEEP_MILLIS},
         crds::Cursor,
         crds_value::CrdsValueLabel,
-};
-use solana_ledger::blockstore::Blockstore;
-use solana_metrics::inc_new_counter_debug;
-use solana_perf::packet::{self, Packets};
-use solana_poh::poh_recorder::PohRecorder;
-use solana_rpc::{
+    },
+    solana_ledger::blockstore::Blockstore,
+    solana_metrics::inc_new_counter_debug,
+    solana_perf::packet::{self, Packets},
+    solana_poh::poh_recorder::PohRecorder,
+    solana_rpc::{
         optimistically_confirmed_bank_tracker::{BankNotification, BankNotificationSender},
         rpc_subscriptions::RpcSubscriptions,
-};
-use solana_runtime::{
+    },
+    solana_runtime::{
         bank::Bank,
         bank_forks::BankForks,
         commitment::VOTE_THRESHOLD_SIZE,
         epoch_stakes::{EpochAuthorizedVoters, EpochStakes},
         stakes::Stakes,
         vote_sender_types::{ReplayVoteReceiver, ReplayedVote},
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         clock::{Epoch, Slot, DEFAULT_MS_PER_SLOT, DEFAULT_TICKS_PER_SLOT},
         epoch_schedule::EpochSchedule,
         hash::Hash,
         pubkey::Pubkey,
         transaction::Transaction,
-};
-use solana_vote_program::{self, vote_state::Vote, vote_transaction};
-use std::{
+    },
+    solana_vote_program::{self, vote_state::Vote, vote_transaction},
+    std::{
         collections::HashMap,
         sync::{
             atomic::{AtomicBool, Ordering},
-        {Arc, Mutex, RwLock},
+            Arc, Mutex, RwLock,
         },
         thread::{self, sleep, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 // Map from a vote account to the authorized voter for an epoch
@@ -835,21 +838,23 @@ impl ClusterInfoVoteListener {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_perf::packet;
-    use solana_rpc::optimistically_confirmed_bank_tracker::OptimisticallyConfirmedBank;
-    use solana_runtime::{
+    use {
+        super::*,
+        solana_perf::packet,
+        solana_rpc::optimistically_confirmed_bank_tracker::OptimisticallyConfirmedBank,
+        solana_runtime::{
             bank::Bank,
             commitment::BlockCommitmentCache,
             genesis_utils::{self, GenesisConfigInfo, ValidatorVoteKeypairs},
             vote_sender_types::ReplayVoteSender,
-    };
-    use solana_sdk::{
+        },
+        solana_sdk::{
             hash::Hash,
             signature::{Keypair, Signature, Signer},
+        },
+        solana_vote_program::vote_state::Vote,
+        std::collections::BTreeSet,
     };
-    use solana_vote_program::vote_state::Vote;
-    use std::collections::BTreeSet;
 
     #[test]
     fn test_max_vote_tx_fits() {

core/src/cluster_slot_state_verifier.rs

@@ -1,9 +1,11 @@
-use crate::{
+use {
+    crate::{
         fork_choice::ForkChoice, heaviest_subtree_fork_choice::HeaviestSubtreeForkChoice,
         progress_map::ProgressMap,
+    },
+    solana_sdk::{clock::Slot, hash::Hash},
+    std::collections::{BTreeMap, BTreeSet},
 };
-use solana_sdk::{clock::Slot, hash::Hash};
-use std::collections::{BTreeMap, BTreeSet};
 
 pub(crate) type DuplicateSlotsTracker = BTreeSet<Slot>;
 pub(crate) type GossipDuplicateConfirmedSlots = BTreeMap<Slot, Hash>;
@@ -305,14 +307,16 @@ pub(crate) fn check_slot_agrees_with_cluster(
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use crate::consensus::test::VoteSimulator;
-    use solana_runtime::bank_forks::BankForks;
-    use std::{
+    use {
+        super::*,
+        crate::consensus::test::VoteSimulator,
+        solana_runtime::bank_forks::BankForks,
+        std::{
             collections::{HashMap, HashSet},
             sync::RwLock,
+        },
+        trees::tr,
     };
-    use trees::tr;
 
     struct InitialState {
         heaviest_subtree_fork_choice: HeaviestSubtreeForkChoice,

core/src/cluster_slots.rs

@@ -186,8 +186,7 @@ impl ClusterSlots {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_runtime::epoch_stakes::NodeVoteAccounts;
+    use {super::*, solana_runtime::epoch_stakes::NodeVoteAccounts};
 
     #[test]
     fn test_default() {

core/src/cluster_slots_service.rs

@@ -1,17 +1,19 @@
-use crate::cluster_slots::ClusterSlots;
-use crossbeam_channel::{Receiver, RecvTimeoutError, Sender};
-use solana_gossip::cluster_info::ClusterInfo;
-use solana_ledger::blockstore::Blockstore;
-use solana_measure::measure::Measure;
-use solana_runtime::bank_forks::BankForks;
-use solana_sdk::clock::Slot;
-use std::{
+use {
+    crate::cluster_slots::ClusterSlots,
+    crossbeam_channel::{Receiver, RecvTimeoutError, Sender},
+    solana_gossip::cluster_info::ClusterInfo,
+    solana_ledger::blockstore::Blockstore,
+    solana_measure::measure::Measure,
+    solana_runtime::bank_forks::BankForks,
+    solana_sdk::clock::Slot,
+    std::{
         sync::{
             atomic::{AtomicBool, Ordering},
-        {Arc, RwLock},
+            Arc, RwLock,
         },
         thread::{self, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 pub type ClusterSlotsUpdateReceiver = Receiver<Vec<Slot>>;

core/src/commitment_service.rs

@@ -1,21 +1,25 @@
-use crate::consensus::Stake;
-use solana_measure::measure::Measure;
-use solana_metrics::datapoint_info;
-use solana_rpc::rpc_subscriptions::RpcSubscriptions;
-use solana_runtime::{
+use {
+    crate::consensus::Stake,
+    solana_measure::measure::Measure,
+    solana_metrics::datapoint_info,
+    solana_rpc::rpc_subscriptions::RpcSubscriptions,
+    solana_runtime::{
         bank::Bank,
         commitment::{BlockCommitment, BlockCommitmentCache, CommitmentSlots, VOTE_THRESHOLD_SIZE},
-};
-use solana_sdk::clock::Slot;
-use solana_vote_program::vote_state::VoteState;
-use std::{
+    },
+    solana_sdk::clock::Slot,
+    solana_vote_program::vote_state::VoteState,
+    std::{
         cmp::max,
         collections::HashMap,
-    sync::atomic::{AtomicBool, Ordering},
-    sync::mpsc::{channel, Receiver, RecvTimeoutError, Sender},
-    sync::{Arc, RwLock},
+        sync::{
+            atomic::{AtomicBool, Ordering},
+            mpsc::{channel, Receiver, RecvTimeoutError, Sender},
+            Arc, RwLock,
+        },
         thread::{self, Builder, JoinHandle},
         time::Duration,
+    },
 };
 
 pub struct CommitmentAggregationData {
@@ -247,18 +251,20 @@ impl AggregateCommitmentService {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_ledger::genesis_utils::{create_genesis_config, GenesisConfigInfo};
-    use solana_runtime::{
+    use {
+        super::*,
+        solana_ledger::genesis_utils::{create_genesis_config, GenesisConfigInfo},
+        solana_runtime::{
             accounts_background_service::AbsRequestSender,
             bank_forks::BankForks,
             genesis_utils::{create_genesis_config_with_vote_accounts, ValidatorVoteKeypairs},
-    };
-    use solana_sdk::{account::Account, pubkey::Pubkey, signature::Signer};
-    use solana_stake_program::stake_state;
-    use solana_vote_program::{
+        },
+        solana_sdk::{account::Account, pubkey::Pubkey, signature::Signer},
+        solana_stake_program::stake_state,
+        solana_vote_program::{
             vote_state::{self, VoteStateVersions},
             vote_transaction,
+        },
     };
 
     #[test]

core/src/completed_data_sets_service.rs

@@ -1,15 +1,19 @@
-use crossbeam_channel::{Receiver, RecvTimeoutError, Sender};
-use solana_ledger::blockstore::{Blockstore, CompletedDataSetInfo};
-use solana_ledger::entry::Entry;
-use solana_rpc::{max_slots::MaxSlots, rpc_subscriptions::RpcSubscriptions};
-use solana_sdk::signature::Signature;
-use std::{
+use {
+    crossbeam_channel::{Receiver, RecvTimeoutError, Sender},
+    solana_ledger::{
+        blockstore::{Blockstore, CompletedDataSetInfo},
+        entry::Entry,
+    },
+    solana_rpc::{max_slots::MaxSlots, rpc_subscriptions::RpcSubscriptions},
+    solana_sdk::signature::Signature,
+    std::{
         sync::{
             atomic::{AtomicBool, Ordering},
             Arc,
         },
         thread::{self, Builder, JoinHandle},
         time::Duration,
+    },
 };
 
 pub type CompletedDataSetsReceiver = Receiver<Vec<CompletedDataSetInfo>>;
@@ -100,10 +104,14 @@ impl CompletedDataSetsService {
 
 #[cfg(test)]
 pub mod test {
-    use super::*;
-    use solana_sdk::hash::Hash;
-    use solana_sdk::signature::{Keypair, Signer};
-    use solana_sdk::transaction::Transaction;
+    use {
+        super::*,
+        solana_sdk::{
+            hash::Hash,
+            signature::{Keypair, Signer},
+            transaction::Transaction,
+        },
+    };
 
     #[test]
     fn test_zero_signatures() {

core/src/consensus.rs

@@ -1,28 +1,29 @@
-use crate::{
+use {
+    crate::{
         heaviest_subtree_fork_choice::HeaviestSubtreeForkChoice,
         latest_validator_votes_for_frozen_banks::LatestValidatorVotesForFrozenBanks,
         progress_map::{LockoutIntervals, ProgressMap},
-};
-use chrono::prelude::*;
-use solana_ledger::{ancestor_iterator::AncestorIterator, blockstore::Blockstore, blockstore_db};
-use solana_measure::measure::Measure;
-use solana_runtime::{
+    },
+    chrono::prelude::*,
+    solana_ledger::{ancestor_iterator::AncestorIterator, blockstore::Blockstore, blockstore_db},
+    solana_measure::measure::Measure,
+    solana_runtime::{
         bank::Bank, bank_forks::BankForks, commitment::VOTE_THRESHOLD_SIZE,
         vote_account::ArcVoteAccount,
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         clock::{Slot, UnixTimestamp},
         hash::Hash,
         instruction::Instruction,
         pubkey::Pubkey,
         signature::{Keypair, Signature, Signer},
         slot_history::{Check, SlotHistory},
-};
-use solana_vote_program::{
+    },
+    solana_vote_program::{
         vote_instruction,
         vote_state::{BlockTimestamp, Lockout, Vote, VoteState, MAX_LOCKOUT_HISTORY},
-};
-use std::{
+    },
+    std::{
         cmp::Ordering,
         collections::{HashMap, HashSet},
         fs::{self, File},
@@ -33,8 +34,9 @@ use std::{
         },
         path::{Path, PathBuf},
         sync::Arc,
+    },
+    thiserror::Error,
 };
-use thiserror::Error;
 
 #[derive(PartialEq, Clone, Debug, AbiExample)]
 pub enum SwitchForkDecision {
@@ -1355,8 +1357,9 @@ pub fn reconcile_blockstore_roots_with_tower(
 
 #[cfg(test)]
 pub mod test {
-    use super::*;
-    use crate::{
+    use {
+        super::*,
+        crate::{
             cluster_info_vote_listener::VoteTracker,
             cluster_slot_state_verifier::{DuplicateSlotsTracker, GossipDuplicateConfirmedSlots},
             cluster_slots::ClusterSlots,
@@ -1365,36 +1368,37 @@ pub mod test {
             progress_map::ForkProgress,
             replay_stage::{HeaviestForkFailures, ReplayStage},
             unfrozen_gossip_verified_vote_hashes::UnfrozenGossipVerifiedVoteHashes,
-    };
-    use solana_ledger::{blockstore::make_slot_entries, get_tmp_ledger_path};
-    use solana_runtime::{
+        },
+        solana_ledger::{blockstore::make_slot_entries, get_tmp_ledger_path},
+        solana_runtime::{
             accounts_background_service::AbsRequestSender,
             bank::Bank,
             bank_forks::BankForks,
             genesis_utils::{
                 create_genesis_config_with_vote_accounts, GenesisConfigInfo, ValidatorVoteKeypairs,
             },
-    };
-    use solana_sdk::{
+        },
+        solana_sdk::{
             account::{Account, AccountSharedData, ReadableAccount, WritableAccount},
             clock::Slot,
             hash::Hash,
             pubkey::Pubkey,
             signature::Signer,
             slot_history::SlotHistory,
-    };
-    use solana_vote_program::{
+        },
+        solana_vote_program::{
             vote_state::{Vote, VoteStateVersions, MAX_LOCKOUT_HISTORY},
             vote_transaction,
-    };
-    use std::{
+        },
+        std::{
             collections::HashMap,
             fs::{remove_file, OpenOptions},
             io::{Read, Seek, SeekFrom, Write},
             sync::RwLock,
+        },
+        tempfile::TempDir,
+        trees::{tr, Tree, TreeWalk},
     };
-    use tempfile::TempDir;
-    use trees::{tr, Tree, TreeWalk};
 
     pub(crate) struct VoteSimulator {
         pub validator_keypairs: HashMap<Pubkey, ValidatorVoteKeypairs>,

core/src/cost_update_service.rs

@@ -3,11 +3,15 @@
 //! packing transactions into block; it also triggers persisting cost
 //! table to blockstore.
 
-use solana_ledger::blockstore::Blockstore;
-use solana_measure::measure::Measure;
-use solana_runtime::{bank::Bank, bank::ExecuteTimings, cost_model::CostModel};
-use solana_sdk::timing::timestamp;
-use std::{
+use {
+    solana_ledger::blockstore::Blockstore,
+    solana_measure::measure::Measure,
+    solana_runtime::{
+        bank::{Bank, ExecuteTimings},
+        cost_model::CostModel,
+    },
+    solana_sdk::timing::timestamp,
+    std::{
         sync::{
             atomic::{AtomicBool, Ordering},
             mpsc::Receiver,
@@ -15,6 +19,7 @@ use std::{
         },
         thread::{self, Builder, JoinHandle},
         time::Duration,
+    },
 };
 
 #[derive(Default)]
@@ -203,9 +208,7 @@ impl CostUpdateService {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_runtime::message_processor::ProgramTiming;
-    use solana_sdk::pubkey::Pubkey;
+    use {super::*, solana_runtime::message_processor::ProgramTiming, solana_sdk::pubkey::Pubkey};
 
     #[test]
     fn test_update_cost_model_with_empty_execute_timings() {

core/src/drop_bank_service.rs

@@ -1,8 +1,10 @@
-use solana_measure::measure::Measure;
-use solana_runtime::bank::Bank;
-use std::{
+use {
+    solana_measure::measure::Measure,
+    solana_runtime::bank::Bank,
+    std::{
         sync::{mpsc::Receiver, Arc},
         thread::{self, Builder, JoinHandle},
+    },
 };
 
 pub struct DropBankService {

core/src/fetch_stage.rs

@@ -1,18 +1,25 @@
 //! The `fetch_stage` batches input from a UDP socket and sends it to a channel.
 
-use crate::banking_stage::HOLD_TRANSACTIONS_SLOT_OFFSET;
-use crate::result::{Error, Result};
-use solana_metrics::{inc_new_counter_debug, inc_new_counter_info};
-use solana_perf::packet::PacketsRecycler;
-use solana_perf::recycler::Recycler;
-use solana_poh::poh_recorder::PohRecorder;
-use solana_sdk::clock::DEFAULT_TICKS_PER_SLOT;
-use solana_streamer::streamer::{self, PacketReceiver, PacketSender};
-use std::net::UdpSocket;
-use std::sync::atomic::AtomicBool;
-use std::sync::mpsc::{channel, RecvTimeoutError};
-use std::sync::{Arc, Mutex};
-use std::thread::{self, Builder, JoinHandle};
+use {
+    crate::{
+        banking_stage::HOLD_TRANSACTIONS_SLOT_OFFSET,
+        result::{Error, Result},
+    },
+    solana_metrics::{inc_new_counter_debug, inc_new_counter_info},
+    solana_perf::{packet::PacketsRecycler, recycler::Recycler},
+    solana_poh::poh_recorder::PohRecorder,
+    solana_sdk::clock::DEFAULT_TICKS_PER_SLOT,
+    solana_streamer::streamer::{self, PacketReceiver, PacketSender},
+    std::{
+        net::UdpSocket,
+        sync::{
+            atomic::AtomicBool,
+            mpsc::{channel, RecvTimeoutError},
+            Arc, Mutex,
+        },
+        thread::{self, Builder, JoinHandle},
+    },
+};
 
 pub struct FetchStage {
     thread_hdls: Vec<JoinHandle<()>>,

core/src/fork_choice.rs

@@ -1,13 +1,15 @@
-use crate::{
+use {
+    crate::{
         consensus::{SwitchForkDecision, Tower},
         latest_validator_votes_for_frozen_banks::LatestValidatorVotesForFrozenBanks,
         progress_map::ProgressMap,
         replay_stage::HeaviestForkFailures,
-};
-use solana_runtime::{bank::Bank, bank_forks::BankForks};
-use std::{
+    },
+    solana_runtime::{bank::Bank, bank_forks::BankForks},
+    std::{
         collections::{HashMap, HashSet},
         sync::{Arc, RwLock},
+    },
 };
 
 pub(crate) struct SelectVoteAndResetForkResult {

core/src/gen_keys.rs

@@ -1,9 +1,11 @@
 //! The `gen_keys` module makes lots of keypairs
 
-use rand::{Rng, SeedableRng};
-use rand_chacha::ChaChaRng;
-use rayon::prelude::*;
-use solana_sdk::signature::Keypair;
+use {
+    rand::{Rng, SeedableRng},
+    rand_chacha::ChaChaRng,
+    rayon::prelude::*,
+    solana_sdk::signature::Keypair,
+};
 
 pub struct GenKeys {
     generator: ChaChaRng,
@@ -39,10 +41,8 @@ impl GenKeys {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
     pub use solana_sdk::pubkey::Pubkey;
-    use solana_sdk::signature::Signer;
-    use std::collections::HashSet;
+    use {super::*, solana_sdk::signature::Signer, std::collections::HashSet};
 
     #[test]
     fn test_new_key_is_deterministic() {

core/src/heaviest_subtree_fork_choice.rs

@@ -1,24 +1,26 @@
-use crate::{
+#[cfg(test)]
+use trees::{Tree, TreeWalk};
+use {
+    crate::{
         consensus::Tower, fork_choice::ForkChoice,
         latest_validator_votes_for_frozen_banks::LatestValidatorVotesForFrozenBanks,
         progress_map::ProgressMap, tree_diff::TreeDiff,
-};
-use solana_measure::measure::Measure;
-use solana_runtime::{bank::Bank, bank_forks::BankForks, epoch_stakes::EpochStakes};
-use solana_sdk::{
+    },
+    solana_measure::measure::Measure,
+    solana_runtime::{bank::Bank, bank_forks::BankForks, epoch_stakes::EpochStakes},
+    solana_sdk::{
         clock::{Epoch, Slot},
         epoch_schedule::EpochSchedule,
         hash::Hash,
         pubkey::Pubkey,
-};
-use std::{
+    },
+    std::{
         borrow::Borrow,
         collections::{hash_map::Entry, BTreeMap, HashMap, HashSet, VecDeque},
         sync::{Arc, RwLock},
         time::Instant,
+    },
 };
-#[cfg(test)]
-use trees::{Tree, TreeWalk};
 
 pub type ForkWeight = u64;
 pub type SlotHashKey = (Slot, Hash);
@@ -1044,12 +1046,14 @@ impl<'a> Iterator for AncestorIterator<'a> {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use crate::consensus::test::VoteSimulator;
-    use solana_runtime::{bank::Bank, bank_utils};
-    use solana_sdk::{hash::Hash, slot_history::SlotHistory};
-    use std::{collections::HashSet, ops::Range};
-    use trees::tr;
+    use {
+        super::*,
+        crate::consensus::test::VoteSimulator,
+        solana_runtime::{bank::Bank, bank_utils},
+        solana_sdk::{hash::Hash, slot_history::SlotHistory},
+        std::{collections::HashSet, ops::Range},
+        trees::tr,
+    };
 
     #[test]
     fn test_max_by_weight() {

core/src/latest_validator_votes_for_frozen_banks.rs

@@ -1,6 +1,8 @@
-use crate::heaviest_subtree_fork_choice::SlotHashKey;
-use solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey};
-use std::collections::{hash_map::Entry, HashMap};
+use {
+    crate::heaviest_subtree_fork_choice::SlotHashKey,
+    solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey},
+    std::collections::{hash_map::Entry, HashMap},
+};
 
 #[derive(Default)]
 pub(crate) struct LatestValidatorVotesForFrozenBanks {

core/src/ledger_cleanup_service.rs

@@ -1,17 +1,24 @@
 //! The `ledger_cleanup_service` drops older ledger data to limit disk space usage
 
-use rand::{thread_rng, Rng};
-use solana_ledger::blockstore::{Blockstore, PurgeType};
-use solana_ledger::blockstore_db::Result as BlockstoreResult;
-use solana_measure::measure::Measure;
-use solana_sdk::clock::{Slot, DEFAULT_TICKS_PER_SLOT, TICKS_PER_DAY};
-use std::string::ToString;
-use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
-use std::sync::mpsc::{Receiver, RecvTimeoutError};
-use std::sync::Arc;
-use std::thread;
-use std::thread::{sleep, Builder, JoinHandle};
-use std::time::Duration;
+use {
+    rand::{thread_rng, Rng},
+    solana_ledger::{
+        blockstore::{Blockstore, PurgeType},
+        blockstore_db::Result as BlockstoreResult,
+    },
+    solana_measure::measure::Measure,
+    solana_sdk::clock::{Slot, DEFAULT_TICKS_PER_SLOT, TICKS_PER_DAY},
+    std::{
+        string::ToString,
+        sync::{
+            atomic::{AtomicBool, AtomicU64, Ordering},
+            mpsc::{Receiver, RecvTimeoutError},
+            Arc,
+        },
+        thread::{self, sleep, Builder, JoinHandle},
+        time::Duration,
+    },
+};
 
 // - To try and keep the RocksDB size under 400GB:
 //   Seeing about 1600b/shred, using 2000b/shred for margin, so 200m shreds can be stored in 400gb.
@@ -306,10 +313,11 @@ impl LedgerCleanupService {
 }
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use solana_ledger::blockstore::make_many_slot_entries;
-    use solana_ledger::get_tmp_ledger_path;
-    use std::sync::mpsc::channel;
+    use {
+        super::*,
+        solana_ledger::{blockstore::make_many_slot_entries, get_tmp_ledger_path},
+        std::sync::mpsc::channel,
+    };
 
     #[test]
     fn test_cleanup1() {

core/src/optimistic_confirmation_verifier.rs

@@ -1,8 +1,10 @@
-use crate::cluster_info_vote_listener::VoteTracker;
-use solana_ledger::blockstore::Blockstore;
-use solana_runtime::bank::Bank;
-use solana_sdk::{clock::Slot, hash::Hash};
-use std::{collections::BTreeSet, time::Instant};
+use {
+    crate::cluster_info_vote_listener::VoteTracker,
+    solana_ledger::blockstore::Blockstore,
+    solana_runtime::bank::Bank,
+    solana_sdk::{clock::Slot, hash::Hash},
+    std::{collections::BTreeSet, time::Instant},
+};
 
 pub struct OptimisticConfirmationVerifier {
     snapshot_start_slot: Slot,
@@ -139,13 +141,11 @@ impl OptimisticConfirmationVerifier {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use crate::consensus::test::VoteSimulator;
-    use solana_ledger::get_tmp_ledger_path;
-    use solana_runtime::bank::Bank;
-    use solana_sdk::pubkey::Pubkey;
-    use std::collections::HashMap;
-    use trees::tr;
+    use {
+        super::*, crate::consensus::test::VoteSimulator, solana_ledger::get_tmp_ledger_path,
+        solana_runtime::bank::Bank, solana_sdk::pubkey::Pubkey, std::collections::HashMap,
+        trees::tr,
+    };
 
     #[test]
     fn test_add_new_optimistic_confirmed_slots() {

core/src/outstanding_requests.rs

@@ -1,7 +1,9 @@
-use crate::request_response::RequestResponse;
-use lru::LruCache;
-use rand::{thread_rng, Rng};
-use solana_ledger::shred::Nonce;
+use {
+    crate::request_response::RequestResponse,
+    lru::LruCache,
+    rand::{thread_rng, Rng},
+    solana_ledger::shred::Nonce,
+};
 
 pub const DEFAULT_REQUEST_EXPIRATION_MS: u64 = 60_000;
 
@@ -72,10 +74,10 @@ pub struct RequestStatus<T> {
 
 #[cfg(test)]
 pub(crate) mod tests {
-    use super::*;
-    use crate::serve_repair::RepairType;
-    use solana_ledger::shred::Shred;
-    use solana_sdk::timing::timestamp;
+    use {
+        super::*, crate::serve_repair::RepairType, solana_ledger::shred::Shred,
+        solana_sdk::timing::timestamp,
+    };
 
     #[test]
     fn test_add_request() {

core/src/progress_map.rs

@@ -1,15 +1,17 @@
-use crate::{
+use {
+    crate::{
         cluster_info_vote_listener::SlotVoteTracker,
         cluster_slots::SlotPubkeys,
+        consensus::{Stake, VotedStakes},
         replay_stage::SUPERMINORITY_THRESHOLD,
-    {consensus::Stake, consensus::VotedStakes},
-};
-use solana_ledger::blockstore_processor::{ConfirmationProgress, ConfirmationTiming};
-use solana_runtime::{bank::Bank, bank_forks::BankForks, vote_account::ArcVoteAccount};
-use solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey};
-use std::{
+    },
+    solana_ledger::blockstore_processor::{ConfirmationProgress, ConfirmationTiming},
+    solana_runtime::{bank::Bank, bank_forks::BankForks, vote_account::ArcVoteAccount},
+    solana_sdk::{clock::Slot, hash::Hash, pubkey::Pubkey},
+    std::{
         collections::{BTreeMap, HashMap, HashSet},
         sync::{Arc, RwLock},
+    },
 };
 
 type VotedSlot = Slot;

core/src/repair_response.rs

@@ -1,10 +1,12 @@
-use solana_ledger::{
+use {
+    solana_ledger::{
         blockstore::Blockstore,
         shred::{Nonce, SIZE_OF_NONCE},
+    },
+    solana_perf::packet::limited_deserialize,
+    solana_sdk::{clock::Slot, packet::Packet},
+    std::{io, net::SocketAddr},
 };
-use solana_perf::packet::limited_deserialize;
-use solana_sdk::{clock::Slot, packet::Packet};
-use std::{io, net::SocketAddr};
 
 pub fn repair_response_packet(
     blockstore: &Blockstore,
@@ -48,15 +50,17 @@ pub fn nonce(buf: &[u8]) -> Option<Nonce> {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_ledger::{
+    use {
+        super::*,
+        solana_ledger::{
             shred::{Shred, Shredder},
             sigverify_shreds::verify_shred_cpu,
-    };
-    use solana_sdk::signature::{Keypair, Signer};
-    use std::{
+        },
+        solana_sdk::signature::{Keypair, Signer},
+        std::{
             collections::HashMap,
             net::{IpAddr, Ipv4Addr},
+        },
     };
 
     fn run_test_sigverify_shred_cpu_repair(slot: Slot) {

core/src/repair_service.rs

@@ -1,6 +1,7 @@
 //! The `repair_service` module implements the tools necessary to generate a thread which
 //! regularly finds missing shreds in the ledger and sends repair requests for those shreds
-use crate::{
+use {
+    crate::{
         cluster_info_vote_listener::VerifiedVoteReceiver,
         cluster_slots::ClusterSlots,
         outstanding_requests::OutstandingRequests,
@@ -8,33 +9,34 @@ use crate::{
         replay_stage::DUPLICATE_THRESHOLD,
         result::Result,
         serve_repair::{RepairType, ServeRepair, REPAIR_PEERS_CACHE_CAPACITY},
-};
-use crossbeam_channel::{Receiver as CrossbeamReceiver, Sender as CrossbeamSender};
-use lru::LruCache;
-use solana_gossip::cluster_info::ClusterInfo;
-use solana_ledger::{
+    },
+    crossbeam_channel::{Receiver as CrossbeamReceiver, Sender as CrossbeamSender},
+    lru::LruCache,
+    solana_gossip::cluster_info::ClusterInfo,
+    solana_ledger::{
         blockstore::{Blockstore, SlotMeta},
         shred::Nonce,
-};
-use solana_measure::measure::Measure;
-use solana_runtime::{bank::Bank, bank_forks::BankForks, contains::Contains};
-use solana_sdk::{
+    },
+    solana_measure::measure::Measure,
+    solana_runtime::{bank::Bank, bank_forks::BankForks, contains::Contains},
+    solana_sdk::{
         clock::{BankId, Slot},
         epoch_schedule::EpochSchedule,
         pubkey::Pubkey,
         timing::timestamp,
-};
-use solana_streamer::sendmmsg::{batch_send, SendPktsError};
-use std::{
+    },
+    solana_streamer::sendmmsg::{batch_send, SendPktsError},
+    std::{
         collections::{HashMap, HashSet},
         iter::Iterator,
-    net::SocketAddr,
-    net::UdpSocket,
-    sync::atomic::{AtomicBool, Ordering},
-    sync::{Arc, RwLock},
-    thread::sleep,
-    thread::{self, Builder, JoinHandle},
+        net::{SocketAddr, UdpSocket},
+        sync::{
+            atomic::{AtomicBool, Ordering},
+            Arc, RwLock,
+        },
+        thread::{self, sleep, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 pub type DuplicateSlotsResetSender = CrossbeamSender<Slot>;
@@ -711,20 +713,23 @@ impl RepairService {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use crossbeam_channel::unbounded;
-    use solana_gossip::{cluster_info::Node, contact_info::ContactInfo};
-    use solana_ledger::blockstore::{
-        make_chaining_slot_entries, make_many_slot_entries, make_slot_entries,
+    use {
+        super::*,
+        crossbeam_channel::unbounded,
+        solana_gossip::{cluster_info::Node, contact_info::ContactInfo},
+        solana_ledger::{
+            blockstore::{
+                make_chaining_slot_entries, make_many_slot_entries, make_slot_entries, Blockstore,
+            },
+            get_tmp_ledger_path,
+            shred::max_ticks_per_n_shreds,
+        },
+        solana_runtime::genesis_utils::{self, GenesisConfigInfo, ValidatorVoteKeypairs},
+        solana_sdk::signature::{Keypair, Signer},
+        solana_streamer::socket::SocketAddrSpace,
+        solana_vote_program::vote_transaction,
+        std::collections::HashSet,
     };
-    use solana_ledger::shred::max_ticks_per_n_shreds;
-    use solana_ledger::{blockstore::Blockstore, get_tmp_ledger_path};
-    use solana_runtime::genesis_utils::{self, GenesisConfigInfo, ValidatorVoteKeypairs};
-    use solana_sdk::signature::Keypair;
-    use solana_sdk::signature::Signer;
-    use solana_streamer::socket::SocketAddrSpace;
-    use solana_vote_program::vote_transaction;
-    use std::collections::HashSet;
 
     fn new_test_cluster_info(contact_info: ContactInfo) -> ClusterInfo {
         ClusterInfo::new(

core/src/repair_weight.rs

@@ -1,17 +1,19 @@
-use crate::{
+use {
+    crate::{
         heaviest_subtree_fork_choice::HeaviestSubtreeForkChoice, repair_service::RepairTiming,
         repair_weighted_traversal, serve_repair::RepairType, tree_diff::TreeDiff,
-};
-use solana_ledger::{ancestor_iterator::AncestorIterator, blockstore::Blockstore};
-use solana_measure::measure::Measure;
-use solana_runtime::{contains::Contains, epoch_stakes::EpochStakes};
-use solana_sdk::{
+    },
+    solana_ledger::{ancestor_iterator::AncestorIterator, blockstore::Blockstore},
+    solana_measure::measure::Measure,
+    solana_runtime::{contains::Contains, epoch_stakes::EpochStakes},
+    solana_sdk::{
         clock::Slot,
         epoch_schedule::{Epoch, EpochSchedule},
         hash::Hash,
         pubkey::Pubkey,
+    },
+    std::collections::{BTreeSet, HashMap, HashSet, VecDeque},
 };
-use std::collections::{BTreeSet, HashMap, HashSet, VecDeque};
 
 pub struct RepairWeight {
     // Map from root -> a subtree rooted at that `root`
@@ -531,11 +533,13 @@ impl RepairWeight {
 
 #[cfg(test)]
 mod test {
-    use super::*;
-    use solana_ledger::{blockstore::Blockstore, get_tmp_ledger_path};
-    use solana_runtime::{bank::Bank, bank_utils};
-    use solana_sdk::hash::Hash;
-    use trees::tr;
+    use {
+        super::*,
+        solana_ledger::{blockstore::Blockstore, get_tmp_ledger_path},
+        solana_runtime::{bank::Bank, bank_utils},
+        solana_sdk::hash::Hash,
+        trees::tr,
+    };
 
     #[test]
     fn test_sort_by_stake_weight_slot() {

core/src/repair_weighted_traversal.rs

@@ -1,11 +1,13 @@
-use crate::{
+use {
+    crate::{
         heaviest_subtree_fork_choice::HeaviestSubtreeForkChoice, repair_service::RepairService,
         serve_repair::RepairType, tree_diff::TreeDiff,
+    },
+    solana_ledger::blockstore::Blockstore,
+    solana_runtime::contains::Contains,
+    solana_sdk::{clock::Slot, hash::Hash},
+    std::collections::{HashMap, HashSet},
 };
-use solana_ledger::blockstore::Blockstore;
-use solana_runtime::contains::Contains;
-use solana_sdk::{clock::Slot, hash::Hash};
-use std::collections::{HashMap, HashSet};
 
 #[derive(Debug, PartialEq)]
 enum Visit {
@@ -136,11 +138,13 @@ pub fn get_best_repair_shreds<'a>(
 
 #[cfg(test)]
 pub mod test {
-    use super::*;
-    use solana_ledger::{get_tmp_ledger_path, shred::Shred};
-    use solana_runtime::bank_utils;
-    use solana_sdk::hash::Hash;
-    use trees::tr;
+    use {
+        super::*,
+        solana_ledger::{get_tmp_ledger_path, shred::Shred},
+        solana_runtime::bank_utils,
+        solana_sdk::hash::Hash,
+        trees::tr,
+    };
 
     #[test]
     fn test_weighted_repair_traversal_single() {

core/src/replay_stage.rs

@@ -1,6 +1,7 @@
 //! The `replay_stage` replays transactions broadcast by the leader.
 
-use crate::{
+use {
+    crate::{
         broadcast_stage::RetransmitSlotsSender,
         cache_block_meta_service::CacheBlockMetaSender,
         cluster_info_vote_listener::{
@@ -23,42 +24,41 @@ use crate::{
         unfrozen_gossip_verified_vote_hashes::UnfrozenGossipVerifiedVoteHashes,
         voting_service::VoteOp,
         window_service::DuplicateSlotReceiver,
-};
-use solana_client::rpc_response::SlotUpdate;
-use solana_gossip::cluster_info::ClusterInfo;
-use solana_ledger::{
+    },
+    solana_client::rpc_response::SlotUpdate,
+    solana_gossip::cluster_info::ClusterInfo,
+    solana_ledger::{
         block_error::BlockError,
         blockstore::Blockstore,
         blockstore_processor::{self, BlockstoreProcessorError, TransactionStatusSender},
         entry::VerifyRecyclers,
         leader_schedule_cache::LeaderScheduleCache,
-};
-use solana_measure::measure::Measure;
-use solana_metrics::inc_new_counter_info;
-use solana_poh::poh_recorder::{PohRecorder, GRACE_TICKS_FACTOR, MAX_GRACE_SLOTS};
-use solana_rpc::{
+    },
+    solana_measure::measure::Measure,
+    solana_metrics::inc_new_counter_info,
+    solana_poh::poh_recorder::{PohRecorder, GRACE_TICKS_FACTOR, MAX_GRACE_SLOTS},
+    solana_rpc::{
         optimistically_confirmed_bank_tracker::{BankNotification, BankNotificationSender},
         rpc_subscriptions::RpcSubscriptions,
-};
-use solana_runtime::{
+    },
+    solana_runtime::{
         accounts_background_service::AbsRequestSender,
         bank::{Bank, ExecuteTimings, NewBankOptions},
         bank_forks::BankForks,
         commitment::BlockCommitmentCache,
         vote_sender_types::ReplayVoteSender,
-};
-use solana_sdk::{
+    },
+    solana_sdk::{
         clock::{Slot, MAX_PROCESSING_AGE, NUM_CONSECUTIVE_LEADER_SLOTS},
         genesis_config::ClusterType,
         hash::Hash,
         pubkey::Pubkey,
-    signature::Signature,
-    signature::{Keypair, Signer},
+        signature::{Keypair, Signature, Signer},
         timing::timestamp,
         transaction::Transaction,
-};
-use solana_vote_program::vote_state::Vote;
-use std::{
+    },
+    solana_vote_program::vote_state::Vote,
+    std::{
         collections::{BTreeMap, HashMap, HashSet},
         result,
         sync::{
@@ -68,6 +68,7 @@ use std::{
         },
         thread::{self, Builder, JoinHandle},
         time::{Duration, Instant},
+    },
 };
 
 pub const MAX_ENTRY_RECV_PER_ITER: usize = 512;
@@ -2561,18 +2562,20 @@ impl ReplayStage {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
-    use crate::{
-        consensus::test::{initialize_state, VoteSimulator},
-        consensus::Tower,
+    use {
+        super::*,
+        crate::{
+            consensus::{
+                test::{initialize_state, VoteSimulator},
+                Tower,
+            },
             progress_map::ValidatorStakeInfo,
             replay_stage::ReplayStage,
-    };
-    use crossbeam_channel::unbounded;
-    use solana_gossip::{cluster_info::Node, crds::Cursor};
-    use solana_ledger::{
-        blockstore::make_slot_entries,
-        blockstore::{entries_to_test_shreds, BlockstoreError},
+        },
+        crossbeam_channel::unbounded,
+        solana_gossip::{cluster_info::Node, crds::Cursor},
+        solana_ledger::{
+            blockstore::{entries_to_test_shreds, make_slot_entries, BlockstoreError},
             create_new_tmp_ledger,
             entry::{self, Entry},
             genesis_utils::{create_genesis_config, create_genesis_config_with_leader},
@@ -2581,17 +2584,17 @@ mod tests {
                 CodingShredHeader, DataShredHeader, Shred, ShredCommonHeader, DATA_COMPLETE_SHRED,
                 SIZE_OF_COMMON_SHRED_HEADER, SIZE_OF_DATA_SHRED_HEADER, SIZE_OF_DATA_SHRED_PAYLOAD,
             },
-    };
-    use solana_rpc::{
+        },
+        solana_rpc::{
             optimistically_confirmed_bank_tracker::OptimisticallyConfirmedBank,
             rpc::create_test_transactions_and_populate_blockstore,
-    };
-    use solana_runtime::{
+        },
+        solana_runtime::{
             accounts_background_service::AbsRequestSender,
             commitment::BlockCommitment,
             genesis_utils::{GenesisConfigInfo, ValidatorVoteKeypairs},
-    };
-    use solana_sdk::{
+        },
+        solana_sdk::{
             clock::NUM_CONSECUTIVE_LEADER_SLOTS,
             genesis_config,
             hash::{hash, Hash},
@@ -2601,20 +2604,20 @@ mod tests {
             signature::{Keypair, Signer},
             system_transaction,
             transaction::TransactionError,
-    };
-    use solana_streamer::socket::SocketAddrSpace;
-    use solana_transaction_status::TransactionWithStatusMeta;
-    use solana_vote_program::{
+        },
+        solana_streamer::socket::SocketAddrSpace,
+        solana_transaction_status::TransactionWithStatusMeta,
+        solana_vote_program::{
             vote_state::{VoteState, VoteStateVersions},
             vote_transaction,
-    };
-    use std::sync::mpsc::channel;
-    use std::{
+        },
+        std::{
             fs::remove_dir_all,
             iter,
-        sync::{atomic::AtomicU64, Arc, RwLock},
+            sync::{atomic::AtomicU64, mpsc::channel, Arc, RwLock},
+        },
+        trees::{tr, Tree},
     };
-    use trees::{tr, Tree};
 
     #[test]
     fn test_is_partition_detected() {

core/src/result.rs

@@ -1,7 +1,9 @@
 //! The `result` module exposes a Result type that propagates one of many different Error types.
 
-use solana_gossip::{cluster_info, gossip_error::GossipError};
-use solana_ledger::blockstore;
+use {
+    solana_gossip::{cluster_info, gossip_error::GossipError},
+    solana_ledger::blockstore,
+};
 
 #[derive(Debug)]
 pub enum Error {
@@ -98,14 +100,15 @@ impl std::convert::From<GossipError> for Error {
 
 #[cfg(test)]
 mod tests {
-    use crate::result::Error;
-    use crate::result::Result;
-    use std::io;
-    use std::io::Write;
-    use std::panic;
-    use std::sync::mpsc::channel;
-    use std::sync::mpsc::RecvError;
-    use std::sync::mpsc::RecvTimeoutError;
+    use {
+        crate::result::{Error, Result},
+        std::{
+            io,
+            io::Write,
+            panic,
+            sync::mpsc::{channel, RecvError, RecvTimeoutError},
+        },
+    };
 
     fn send_error() -> Result<()> {
         let (s, r) = channel();