diff --git a/api/src/client.rs b/api/src/client.rs
index de314d632..7ed935654 100644
--- a/api/src/client.rs
+++ b/api/src/client.rs
@@ -20,10 +20,8 @@ use failure::{Fail, ResultExt};
 use hyper::body;
 use hyper::header::{ACCEPT, AUTHORIZATION, CONTENT_TYPE, USER_AGENT};
 use hyper::{Body, Client, Request};
-use hyper_rustls;
 use hyper_timeout::TimeoutConnector;
 use serde::{Deserialize, Serialize};
-use serde_json;
 use std::time::Duration;
 use tokio::runtime::Builder;
 
diff --git a/api/src/foreign_rpc.rs b/api/src/foreign_rpc.rs
index bd0b1938b..85673404c 100644
--- a/api/src/foreign_rpc.rs
+++ b/api/src/foreign_rpc.rs
@@ -856,7 +856,7 @@ macro_rules! doctest_helper_json_rpc_foreign_assert_response {
 		// create temporary grin server, run jsonrpc request on node api, delete server, return
 		// json response.
 
-			{
+		{
 			/*use grin_servers::test_framework::framework::run_doctest;
 			use grin_util as util;
 			use serde_json;
@@ -890,6 +890,6 @@ macro_rules! doctest_helper_json_rpc_foreign_assert_response {
 					serde_json::to_string_pretty(&expected_response).unwrap()
 				);
 				}*/
-			}
+		}
 	};
 }
diff --git a/api/src/json_rpc.rs b/api/src/json_rpc.rs
index fb6a8e434..5978fc4a8 100644
--- a/api/src/json_rpc.rs
+++ b/api/src/json_rpc.rs
@@ -16,7 +16,6 @@
 //! JSON RPC Client functionality
 use std::{error, fmt};
 
-use hyper;
 use serde::{Deserialize, Serialize};
 
 /// Builds a request
@@ -143,7 +142,7 @@ impl fmt::Display for Error {
 				write!(f, "duplicate RPC batch response ID: {}", v)
 			}
 			Error::_WrongBatchResponseId(ref v) => write!(f, "wrong RPC batch response ID: {}", v),
-			_ => f.write_str(&self.to_string()),
+			_ => write!(f, "{}", self),
 		}
 	}
 }
diff --git a/api/src/lib.rs b/api/src/lib.rs
index 0b3f788f1..54620bc29 100644
--- a/api/src/lib.rs
+++ b/api/src/lib.rs
@@ -19,7 +19,6 @@ use grin_pool as pool;
 
 use grin_util as util;
 
-use failure;
 #[macro_use]
 extern crate failure_derive;
 #[macro_use]
diff --git a/api/src/owner_rpc.rs b/api/src/owner_rpc.rs
index e68a31174..f8c3cdc48 100644
--- a/api/src/owner_rpc.rs
+++ b/api/src/owner_rpc.rs
@@ -391,7 +391,7 @@ macro_rules! doctest_helper_json_rpc_owner_assert_response {
 		// create temporary grin server, run jsonrpc request on node api, delete server, return
 		// json response.
 
-			{
+		{
 			/*use grin_servers::test_framework::framework::run_doctest;
 			use grin_util as util;
 			use serde_json;
@@ -425,6 +425,6 @@ macro_rules! doctest_helper_json_rpc_owner_assert_response {
 					serde_json::to_string_pretty(&expected_response).unwrap()
 				);
 				}*/
-			}
+		}
 	};
 }
diff --git a/api/src/rest.rs b/api/src/rest.rs
index c94c73a91..01d10544f 100644
--- a/api/src/rest.rs
+++ b/api/src/rest.rs
@@ -26,7 +26,6 @@ use futures::TryStreamExt;
 use hyper::server::accept;
 use hyper::service::make_service_fn;
 use hyper::{Body, Request, Server, StatusCode};
-use rustls;
 use rustls::internal::pemfile;
 use std::convert::Infallible;
 use std::fmt::{self, Display};
diff --git a/api/src/router.rs b/api/src/router.rs
index 04dd3024d..1c1bf0145 100644
--- a/api/src/router.rs
+++ b/api/src/router.rs
@@ -13,7 +13,6 @@
 // limitations under the License.
 
 use futures::future::{self, Future};
-use hyper;
 use hyper::service::Service;
 use hyper::{Body, Method, Request, Response, StatusCode};
 use std::collections::hash_map::DefaultHasher;
diff --git a/api/src/types.rs b/api/src/types.rs
index 422a90e37..3945341de 100644
--- a/api/src/types.rs
+++ b/api/src/types.rs
@@ -21,7 +21,6 @@ use crate::core::{core, ser};
 use crate::p2p;
 use crate::util::secp::pedersen;
 use crate::util::{self, ToHex};
-use serde;
 use serde::de::MapAccess;
 use serde::ser::SerializeStruct;
 use std::fmt;
@@ -30,7 +29,7 @@ macro_rules! no_dup {
 	($field:ident) => {
 		if $field.is_some() {
 			return Err(serde::de::Error::duplicate_field("$field"));
-			}
+		}
 	};
 }
 
@@ -644,7 +643,7 @@ impl BlockPrintable {
 			.map(|output| {
 				OutputPrintable::from_output(
 					output,
-					chain.clone(),
+					chain,
 					Some(&block.header),
 					include_proof,
 					include_merkle_proof,
diff --git a/api/src/web.rs b/api/src/web.rs
index 5212349a3..fd5bc440d 100644
--- a/api/src/web.rs
+++ b/api/src/web.rs
@@ -5,7 +5,6 @@ use futures::future::ok;
 use hyper::body;
 use hyper::{Body, Request, Response, StatusCode};
 use serde::{Deserialize, Serialize};
-use serde_json;
 use std::collections::HashMap;
 use std::fmt::Debug;
 use url::form_urlencoded;
diff --git a/chain/src/lib.rs b/chain/src/lib.rs
index 092b88038..157275239 100644
--- a/chain/src/lib.rs
+++ b/chain/src/lib.rs
@@ -31,7 +31,6 @@ extern crate serde_derive;
 #[macro_use]
 extern crate log;
 
-use failure;
 use grin_core as core;
 use grin_keychain as keychain;
 use grin_util as util;
diff --git a/chain/src/txhashset/txhashset.rs b/chain/src/txhashset/txhashset.rs
index c0ec9d394..3ea6eab0f 100644
--- a/chain/src/txhashset/txhashset.rs
+++ b/chain/src/txhashset/txhashset.rs
@@ -34,7 +34,6 @@ use crate::types::{CommitPos, OutputRoots, Tip, TxHashSetRoots, TxHashsetWriteSt
 use crate::util::secp::pedersen::{Commitment, RangeProof};
 use crate::util::{file, secp_static, zip};
 use croaring::Bitmap;
-use grin_store;
 use grin_store::pmmr::{clean_files_by_prefix, PMMRBackend};
 use std::fs::{self, File};
 use std::path::{Path, PathBuf};
diff --git a/config/src/config.rs b/config/src/config.rs
index 1723e3d14..5a71a20af 100644
--- a/config/src/config.rs
+++ b/config/src/config.rs
@@ -14,7 +14,6 @@
 
 //! Configuration file management
 
-use dirs;
 use rand::distributions::{Alphanumeric, Distribution};
 use rand::thread_rng;
 use std::env;
@@ -23,7 +22,6 @@ use std::io::prelude::*;
 use std::io::BufReader;
 use std::io::Read;
 use std::path::PathBuf;
-use toml;
 
 use crate::comments::insert_comments;
 use crate::core::global;
diff --git a/core/src/core/transaction.rs b/core/src/core/transaction.rs
index d963e1854..58874c2d8 100644
--- a/core/src/core/transaction.rs
+++ b/core/src/core/transaction.rs
@@ -115,9 +115,7 @@ impl TryFrom<u64> for FeeFields {
 	type Error = Error;
 
 	fn try_from(fee: u64) -> Result<Self, Self::Error> {
-		if fee == 0 {
-			Err(Error::InvalidFeeFields)
-		} else if fee > FeeFields::FEE_MASK {
+		if fee == 0 || fee > FeeFields::FEE_MASK {
 			Err(Error::InvalidFeeFields)
 		} else {
 			Ok(Self(fee))
@@ -158,11 +156,7 @@ impl FeeFields {
 	/// Create a new FeeFields from the provided shift and fee
 	/// Checks both are valid (in range)
 	pub fn new(fee_shift: u64, fee: u64) -> Result<Self, Error> {
-		if fee == 0 {
-			Err(Error::InvalidFeeFields)
-		} else if fee > FeeFields::FEE_MASK {
-			Err(Error::InvalidFeeFields)
-		} else if fee_shift > FeeFields::FEE_SHIFT_MASK {
+		if fee == 0 || fee > FeeFields::FEE_MASK || fee_shift > FeeFields::FEE_SHIFT_MASK {
 			Err(Error::InvalidFeeFields)
 		} else {
 			Ok(Self((fee_shift << FeeFields::FEE_BITS) | fee))
@@ -236,12 +230,11 @@ impl TryFrom<u16> for NRDRelativeHeight {
 	type Error = Error;
 
 	fn try_from(height: u16) -> Result<Self, Self::Error> {
-		if height == 0 {
-			Err(Error::InvalidNRDRelativeHeight)
-		} else if height
-			> NRDRelativeHeight::MAX
-				.try_into()
-				.expect("WEEK_HEIGHT const should fit in u16")
+		if height == 0
+			|| height
+				> NRDRelativeHeight::MAX
+					.try_into()
+					.expect("WEEK_HEIGHT const should fit in u16")
 		{
 			Err(Error::InvalidNRDRelativeHeight)
 		} else {
diff --git a/p2p/src/types.rs b/p2p/src/types.rs
index 2a89846bf..6ca114137 100644
--- a/p2p/src/types.rs
+++ b/p2p/src/types.rs
@@ -25,8 +25,6 @@ use chrono::prelude::*;
 use serde::de::{SeqAccess, Visitor};
 use serde::{Deserialize, Deserializer};
 
-use grin_store;
-
 use crate::chain;
 use crate::chain::txhashset::BitmapChunk;
 use crate::core::core;
diff --git a/servers/src/mining/stratumserver.rs b/servers/src/mining/stratumserver.rs
index c49838c5c..74e1a8955 100644
--- a/servers/src/mining/stratumserver.rs
+++ b/servers/src/mining/stratumserver.rs
@@ -23,8 +23,6 @@ use tokio_util::codec::{Framed, LinesCodec};
 
 use crate::util::RwLock;
 use chrono::prelude::Utc;
-use serde;
-use serde_json;
 use serde_json::Value;
 use std::collections::HashMap;
 use std::net::SocketAddr;
diff --git a/src/bin/cmd/client.rs b/src/bin/cmd/client.rs
index dcb2f1417..92e25c728 100644
--- a/src/bin/cmd/client.rs
+++ b/src/bin/cmd/client.rs
@@ -24,7 +24,6 @@ use crate::config::GlobalConfig;
 use crate::p2p::types::PeerInfoDisplay;
 use crate::util::file::get_first_line;
 use serde_json::json;
-use term;
 
 const ENDPOINT: &str = "/v2/owner";
 
@@ -155,7 +154,7 @@ pub fn client_command(client_args: &ArgMatches<'_>, global_config: GlobalConfig)
 	// just get defaults from the global config
 	let server_config = global_config.members.unwrap().server;
 	let api_secret = get_first_line(server_config.api_secret_path.clone());
-	let node_client = HTTPNodeClient::new(&server_config.api_http_addr, api_secret.clone());
+	let node_client = HTTPNodeClient::new(&server_config.api_http_addr, api_secret);
 
 	match client_args.subcommand() {
 		("status", Some(_)) => {
diff --git a/src/bin/cmd/server.rs b/src/bin/cmd/server.rs
index eb17181cc..b0c9d5a76 100644
--- a/src/bin/cmd/server.rs
+++ b/src/bin/cmd/server.rs
@@ -20,7 +20,6 @@ use std::thread;
 use std::time::Duration;
 
 use clap::ArgMatches;
-use ctrlc;
 
 use crate::config::GlobalConfig;
 use crate::p2p::Seeding;
diff --git a/src/bin/tui/mining.rs b/src/bin/tui/mining.rs
index 5cd814537..7fabb6f99 100644
--- a/src/bin/tui/mining.rs
+++ b/src/bin/tui/mining.rs
@@ -16,7 +16,7 @@
 
 use std::cmp::Ordering;
 
-use crate::tui::chrono::prelude::{DateTime, NaiveDateTime, Utc};
+use chrono::prelude::{DateTime, NaiveDateTime, Utc};
 use cursive::direction::Orientation;
 use cursive::event::Key;
 use cursive::traits::{Boxable, Identifiable};
diff --git a/src/bin/tui/mod.rs b/src/bin/tui/mod.rs
index 8a2f98575..a1d3b7040 100644
--- a/src/bin/tui/mod.rs
+++ b/src/bin/tui/mod.rs
@@ -12,10 +12,6 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Grin TUI
-use chrono;
-use humansize;
-//
 mod constants;
 mod logs;
 mod menu;
diff --git a/src/bin/tui/peers.rs b/src/bin/tui/peers.rs
index 9848985e8..2a133227c 100644
--- a/src/bin/tui/peers.rs
+++ b/src/bin/tui/peers.rs
@@ -18,8 +18,8 @@ use std::cmp::Ordering;
 
 use crate::servers::{PeerStats, ServerStats};
 
-use crate::tui::humansize::{file_size_opts::CONVENTIONAL, FileSize};
 use chrono::prelude::*;
+use humansize::{file_size_opts::CONVENTIONAL, FileSize};
 
 use cursive::direction::Orientation;
 use cursive::event::Key;
diff --git a/store/src/lib.rs b/store/src/lib.rs
index ac2e0800a..8fc27278d 100644
--- a/store/src/lib.rs
+++ b/store/src/lib.rs
@@ -22,7 +22,6 @@
 
 #[macro_use]
 extern crate log;
-use failure;
 #[macro_use]
 extern crate failure_derive;
 #[macro_use]
diff --git a/store/src/types.rs b/store/src/types.rs
index 4fd8105be..3c3d94aca 100644
--- a/store/src/types.rs
+++ b/store/src/types.rs
@@ -12,7 +12,6 @@
 // limitations under the License.
 
 //! Common storage-related types
-use memmap;
 use tempfile::tempfile;
 
 use crate::core::ser::{