diff --git a/src/block.rs b/src/block.rs
index 2448151..8f81c14 100644
--- a/src/block.rs
+++ b/src/block.rs
@@ -1,6 +1,5 @@
 use crate::{pow::ProofOfWork, transaction::Transaction};
 use serde::{Deserialize, Serialize};
-use serde_json;
 use sha2::{Digest, Sha256};
 use std::{time, vec};
 
@@ -42,7 +41,7 @@ impl Block {
 
     pub fn serialize(&self) -> Vec<u8> {
         let json_str = serde_json::to_string(self).unwrap();
-        return json_str.into_bytes();
+        json_str.into_bytes()
     }
 
     pub fn hash_transactions(&self) -> Vec<u8> {
diff --git a/src/blockchain.rs b/src/blockchain.rs
index 0355231..3a8d0d5 100644
--- a/src/blockchain.rs
+++ b/src/blockchain.rs
@@ -4,7 +4,6 @@ use crate::{
     transaction::{new_coinbase_tx, Transaction},
     transaction_output::TXOutput,
 };
-use sled;
 use std::{collections::HashMap, error::Error};
 
 const COINBASEDATA: &str = "coinbase";
diff --git a/src/cli.rs b/src/cli.rs
index 2fb051b..4e0585e 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -3,7 +3,7 @@ use std::{println, vec};
 use crate::{blockchain::Blockchain, pow::ProofOfWork, transaction, wallet, wallets::Wallets};
 use structopt::StructOpt;
 
-pub struct CLI {
+pub struct Cli {
     pub cmd: Command,
 }
 
@@ -42,7 +42,7 @@ pub enum Command {
     },
 }
 
-impl CLI {
+impl Cli {
     pub fn run(&mut self) {
         match &self.cmd {
             Command::CreateBlockChain { address } => self.create_blockchain(address.to_string()),
@@ -50,7 +50,7 @@ impl CLI {
             Command::PrintChain => self.print_chain(),
             Command::ListAddress => self.list_address(),
             Command::Send { from, to, amount } => {
-                self.send(from.to_string(), to.to_string(), amount.clone())
+                self.send(from.to_string(), to.to_string(), *amount)
             }
             Command::Getbalance { address } => self.get_balance(address.to_string()),
         }
@@ -79,20 +79,16 @@ impl CLI {
         let bc = Blockchain::new("");
         let mut bci = bc.iterator();
 
-        loop {
-            if let Some(block) = bci.next() {
-                println!("Prev hash: {:}", hex::encode(&block.prev_block_hash));
-                println!("Hash: {:}", hex::encode(&block.hash));
-                let pow = ProofOfWork::new(&block);
-                println!("PoW: {:}", pow.validate());
-                println!("Transactions:");
-                for (i, tx) in block.transactions.iter().enumerate() {
-                    println!("tx{:}: {:}", i, tx);
-                }
-                println!();
-            } else {
-                break;
+        while let Some(block) = bci.next() {
+            println!("Prev hash: {:}", hex::encode(&block.prev_block_hash));
+            println!("Hash: {:}", hex::encode(&block.hash));
+            let pow = ProofOfWork::new(&block);
+            println!("PoW: {:}", pow.validate());
+            println!("Transactions:");
+            for (i, tx) in block.transactions.iter().enumerate() {
+                println!("tx{:}: {:}", i, tx);
             }
+            println!();
         }
     }
 
@@ -104,7 +100,7 @@ impl CLI {
             panic!("Recipient address is not valid")
         }
         let mut bc = Blockchain::new(&from);
-        let tx = transaction::new_utxo_transaction(from.to_string(), to.to_string(), amount, &bc);
+        let tx = transaction::new_utxo_transaction(from, to, amount, &bc);
         bc.mine_block(vec![tx]);
         println!("Success!");
     }
diff --git a/src/iterator.rs b/src/iterator.rs
index 5e9fb73..8ae067e 100644
--- a/src/iterator.rs
+++ b/src/iterator.rs
@@ -1,5 +1,4 @@
 use crate::block::{deserialize_block, Block};
-use sled;
 
 pub struct BlockchainIterator<'a> {
     pub current_hash: Vec<u8>,
diff --git a/src/main.rs b/src/main.rs
index e8923de..74d62a1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -12,7 +12,7 @@ mod wallet;
 mod wallets;
 
 fn main() {
-    let mut c = cli::CLI {
+    let mut c = cli::Cli {
         cmd: cli::Command::from_args(),
     };
     c.run();
diff --git a/src/pow.rs b/src/pow.rs
index 5c4a702..7f0ac99 100644
--- a/src/pow.rs
+++ b/src/pow.rs
@@ -53,7 +53,7 @@ impl<'a> ProofOfWork<'a> {
             let data = self.prepare_data(nonce);
 
             let result = Sha256::digest(&data);
-            hash.copy_from_slice(&result.as_slice());
+            hash.copy_from_slice(result.as_slice());
             hash_int = BigUint::from_bytes_le(&hash);
             hash.reverse();
 
diff --git a/src/transaction.rs b/src/transaction.rs
index 0d4e7b0..799d543 100644
--- a/src/transaction.rs
+++ b/src/transaction.rs
@@ -25,8 +25,7 @@ impl Transaction {
     }
 
     pub fn serialize(&self) -> String {
-        let json_str = serde_json::to_string(self).unwrap();
-        json_str
+        serde_json::to_string(self).unwrap()
     }
 
     fn hash(&self) -> Vec<u8> {
@@ -121,7 +120,7 @@ impl Transaction {
                     .unwrap();
 
             let sig = secp256k1::Signature::from_compact(&vin.signature).unwrap();
-            if !secp.verify(&tx_copy_message, &sig, &pk).is_ok() {
+            if secp.verify(&tx_copy_message, &sig, &pk).is_err() {
                 return false;
             }
         }
@@ -132,12 +131,12 @@ impl Transaction {
 
 impl fmt::Display for Transaction {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        _ = write!(f, "{}\n", hex::encode(&self.id));
+        _ = writeln!(f, "{}", hex::encode(&self.id));
         for (i, v) in self.vin.iter().enumerate() {
-            _ = write!(f, "vin{}>>>{}\n", i, v);
+            _ = writeln!(f, "vin{}>>>{}", i, v);
         }
         for (i, v) in self.vout.iter().enumerate() {
-            _ = write!(f, "vout{}>>>{}\n", i, v);
+            _ = writeln!(f, "vout{}>>>{}", i, v);
         }
         Ok(())
     }
diff --git a/src/wallet.rs b/src/wallet.rs
index 51e3d51..161935a 100644
--- a/src/wallet.rs
+++ b/src/wallet.rs
@@ -1,4 +1,3 @@
-use bs58;
 use rand::Rng;
 use ripemd160::{Digest as RipemdDigest, Ripemd160};
 use secp256k1::{PublicKey, Secp256k1, SecretKey};
@@ -67,7 +66,7 @@ pub fn hash_pub_key(pub_key: &[u8]) -> Vec<u8> {
 pub fn checksum(payload: &[u8]) -> Vec<u8> {
     let first_sha = Sha256::digest(payload);
 
-    let second_sha = Sha256::digest(&first_sha.as_slice());
+    let second_sha = Sha256::digest(first_sha.as_slice());
 
     second_sha[0..CHECKSUM_LENGTH].to_vec()
 }