diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1ca4411c..97eac86b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
         with:
-            toolchain: 1.75.0
+            toolchain: 1.78.0
             components: rustfmt, clippy
             override: true
       - name: rustfmt
@@ -51,7 +51,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: actions-rs/toolchain@v1
         with:
-            toolchain: 1.76.0
+            toolchain: 1.78.0
             components: rustfmt, clippy
             override: true
       - name: rustfmt
diff --git a/gui/src/app/state/label.rs b/gui/src/app/state/label.rs
index 0668f1d3..e451c621 100644
--- a/gui/src/app/state/label.rs
+++ b/gui/src/app/state/label.rs
@@ -32,7 +32,7 @@ impl LabelsEdited {
                     for item in items {
                         if let Some(label) = self.0.get_mut(&item) {
                             label.valid = valid;
-                            label.value = value.clone();
+                            label.value.clone_from(&value);
                         } else {
                             self.0.insert(
                                 item,
diff --git a/gui/src/app/state/psbt.rs b/gui/src/app/state/psbt.rs
index 50363b31..d4ddef03 100644
--- a/gui/src/app/state/psbt.rs
+++ b/gui/src/app/state/psbt.rs
@@ -35,9 +35,6 @@ use crate::{
 };
 
 pub trait Action {
-    fn warning(&self) -> Option<&Error> {
-        None
-    }
     fn load(&self, _daemon: Arc<dyn Daemon + Sync + Send>) -> Command<Message> {
         Command::none()
     }
@@ -432,10 +429,6 @@ impl SignAction {
 }
 
 impl Action for SignAction {
-    fn warning(&self) -> Option<&Error> {
-        self.error.as_ref()
-    }
-
     fn subscription(&self) -> Subscription<Message> {
         self.hws.refresh().map(Message::HardwareWallets)
     }
diff --git a/gui/src/app/state/settings/wallet.rs b/gui/src/app/state/settings/wallet.rs
index f736267c..3f2710d2 100644
--- a/gui/src/app/state/settings/wallet.rs
+++ b/gui/src/app/state/settings/wallet.rs
@@ -62,7 +62,7 @@ impl WalletSettingsState {
             .collect();
 
         for fingerprint in wallet.descriptor_keys().into_iter() {
-            if wallet.keys_aliases.get(&fingerprint).is_none() {
+            if !wallet.keys_aliases.contains_key(&fingerprint) {
                 keys_aliases.push((fingerprint, form::Value::default()));
             }
         }
diff --git a/gui/src/app/state/spend/step.rs b/gui/src/app/state/spend/step.rs
index 4453b54f..17aeb8f7 100644
--- a/gui/src/app/state/spend/step.rs
+++ b/gui/src/app/state/spend/step.rs
@@ -586,7 +586,7 @@ impl Step for DefineSpend {
             .cloned()
             .collect();
         if let Some((psbt, _)) = &self.generated {
-            draft.labels = self.coins_labels.clone();
+            draft.labels.clone_from(&self.coins_labels);
             for (i, output) in psbt.unsigned_tx.output.iter().enumerate() {
                 if let Some(label) = self
                     .recipients
@@ -612,11 +612,11 @@ impl Step for DefineSpend {
                 }
             }
         }
-        draft.recipients = self.recipients.clone();
+        draft.recipients.clone_from(&self.recipients);
         if self.recipients.len() > 1 {
             draft.batch_label = Some(self.batch_label.value.clone());
         }
-        draft.generated = self.generated.clone();
+        draft.generated.clone_from(&self.generated);
     }
 
     fn view<'a>(&'a self, cache: &'a Cache) -> Element<'a, view::Message> {
@@ -755,7 +755,7 @@ impl Step for SaveSpend {
             &self.curve,
             draft.network,
         );
-        tx.labels = draft.labels.clone();
+        tx.labels.clone_from(&draft.labels);
 
         if tx.is_batch() {
             if let Some(label) = &draft.batch_label {
diff --git a/gui/src/hw.rs b/gui/src/hw.rs
index 15127ac9..102bd558 100644
--- a/gui/src/hw.rs
+++ b/gui/src/hw.rs
@@ -175,7 +175,7 @@ impl HardwareWallets {
     }
 
     pub fn with_wallet(mut self, wallet: Arc<Wallet>) -> Self {
-        self.aliases = wallet.keys_aliases.clone();
+        self.aliases.clone_from(&wallet.keys_aliases);
         self.wallet = Some(wallet);
         self
     }
diff --git a/gui/src/installer/step/bitcoind.rs b/gui/src/installer/step/bitcoind.rs
index 1fe2c13d..1dc1cf3b 100644
--- a/gui/src/installer/step/bitcoind.rs
+++ b/gui/src/installer/step/bitcoind.rs
@@ -770,9 +770,10 @@ impl Step for InternalBitcoindStep {
     fn apply(&mut self, ctx: &mut Context) -> bool {
         // Any errors have been handled as part of `message::InternalBitcoindMsg::Start`
         if let Some(Ok(_)) = self.started {
-            ctx.bitcoind_config = self.bitcoind_config.clone();
-            ctx.internal_bitcoind_config = self.internal_bitcoind_config.clone();
-            ctx.internal_bitcoind = self.internal_bitcoind.clone();
+            ctx.bitcoind_config.clone_from(&self.bitcoind_config);
+            ctx.internal_bitcoind_config
+                .clone_from(&self.internal_bitcoind_config);
+            ctx.internal_bitcoind.clone_from(&self.internal_bitcoind);
             self.error = None;
             return true;
         }
diff --git a/gui/src/installer/step/descriptor.rs b/gui/src/installer/step/descriptor.rs
index d91f6303..caa1613b 100644
--- a/gui/src/installer/step/descriptor.rs
+++ b/gui/src/installer/step/descriptor.rs
@@ -984,7 +984,7 @@ impl DescriptorEditModal for EditXpubModal {
                             Some((key.fingerprint, key.device_kind, key.device_version.clone()));
                         self.form_xpub.value = key.key.to_string();
                         self.form_xpub.valid = true;
-                        self.form_name.value = key.name.clone();
+                        self.form_name.value.clone_from(&key.name);
                         self.form_name.valid = true;
                     }
                 }
@@ -1394,7 +1394,7 @@ impl RegisterDescriptor {
 
 impl Step for RegisterDescriptor {
     fn load_context(&mut self, ctx: &Context) {
-        self.descriptor = ctx.descriptor.clone();
+        self.descriptor.clone_from(&ctx.descriptor);
         let mut map = HashMap::new();
         for key in ctx.keys.iter().filter(|k| !k.name.is_empty()) {
             map.insert(key.master_fingerprint, key.name.clone());
@@ -1527,7 +1527,7 @@ impl Step for BackupDescriptor {
     }
     fn load_context(&mut self, ctx: &Context) {
         if self.descriptor != ctx.descriptor {
-            self.descriptor = ctx.descriptor.clone();
+            self.descriptor.clone_from(&ctx.descriptor);
             self.done = false;
         }
     }
diff --git a/gui/src/installer/step/mod.rs b/gui/src/installer/step/mod.rs
index 29365c08..34024a20 100644
--- a/gui/src/installer/step/mod.rs
+++ b/gui/src/installer/step/mod.rs
@@ -91,7 +91,7 @@ impl Default for Final {
 
 impl Step for Final {
     fn load_context(&mut self, ctx: &Context) {
-        self.internal_bitcoind = ctx.internal_bitcoind.clone();
+        self.internal_bitcoind.clone_from(&ctx.internal_bitcoind);
     }
     fn load(&self) -> Command<Message> {
         if !self.generating && self.config_path.is_none() {
diff --git a/gui/src/main.rs b/gui/src/main.rs
index f9fe3b09..ba344fc5 100644
--- a/gui/src/main.rs
+++ b/gui/src/main.rs
@@ -1,7 +1,5 @@
 #![windows_subsystem = "windows"]
 
-use std::{error::Error, io::Write, path::PathBuf, process, str::FromStr};
-
 use iced::{
     event::{self, Event},
     executor, keyboard,
@@ -9,6 +7,7 @@ use iced::{
     window::settings::PlatformSpecific,
     Application, Command, Settings, Size, Subscription,
 };
+use std::{error::Error, io::Write, path::PathBuf, process, str::FromStr};
 use tracing::{error, info};
 use tracing_subscriber::filter::LevelFilter;
 extern crate serde;
diff --git a/gui/ui/src/component/toast.rs b/gui/ui/src/component/toast.rs
index 7da518cf..26feae4f 100644
--- a/gui/ui/src/component/toast.rs
+++ b/gui/ui/src/component/toast.rs
@@ -52,7 +52,7 @@ where
     }
 
     fn tag(&self) -> iced::advanced::widget::tree::Tag {
-        struct Marker(Vec<Instant>);
+        struct Marker(());
         iced::advanced::widget::tree::Tag::of::<Marker>()
     }
 
diff --git a/src/commands/mod.rs b/src/commands/mod.rs
index 605d4196..714cd1b3 100644
--- a/src/commands/mod.rs
+++ b/src/commands/mod.rs
@@ -608,7 +608,7 @@ impl DaemonControl {
             let coins = db_conn.coins_by_outpoints(&outpoints);
             if coins.len() != outpoints.len() {
                 for op in outpoints {
-                    if coins.get(&op).is_none() {
+                    if !coins.contains_key(&op) {
                         return Err(CommandError::UnknownOutpoint(op));
                     }
                 }
diff --git a/src/config.rs b/src/config.rs
index 08a98923..c0f24ac1 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -158,10 +158,7 @@ pub struct Config {
 
 impl Config {
     pub fn data_dir(&self) -> Option<PathBuf> {
-        self.data_dir
-            .as_ref()
-            .map(Clone::clone)
-            .or_else(config_folder_path)
+        self.data_dir.clone().or_else(config_folder_path)
     }
 }
 
diff --git a/src/descriptors/mod.rs b/src/descriptors/mod.rs
index 3cefe9f5..7ff6ac30 100644
--- a/src/descriptors/mod.rs
+++ b/src/descriptors/mod.rs
@@ -1116,7 +1116,7 @@ mod tests {
         // - Push a signature for the primary/recovery key
         // NOTE: The specific value is asserted because this was tested against a regtest
         // transaction.
-        let stack = vec![vec![0; 65], vec![0; 72]];
+        let stack = [vec![0; 65], vec![0; 72]];
         let witness_size = bitcoin::VarInt(stack.len() as u64).size()
             + stack
                 .iter()
@@ -1126,7 +1126,7 @@ mod tests {
             desc.spender_input_size(true),
             32 + 4 + 1 + 4 + wu_to_vb(witness_size),
         );
-        let stack = vec![vec![0; 65], vec![0; 0], vec![0; 33], vec![0; 72]];
+        let stack = [vec![0; 65], vec![0; 0], vec![0; 33], vec![0; 72]];
         let witness_size = bitcoin::VarInt(stack.len() as u64).size()
             + stack
                 .iter()
diff --git a/src/jsonrpc/api.rs b/src/jsonrpc/api.rs
index 8bc7fcab..5835e2e9 100644
--- a/src/jsonrpc/api.rs
+++ b/src/jsonrpc/api.rs
@@ -156,7 +156,7 @@ fn list_coins(control: &DaemonControl, params: Option<Params>) -> Result<serde_j
             .map(|op_arg| {
                 op_arg
                     .as_str()
-                    .and_then(|op| bitcoin::OutPoint::from_str(op).map_or_else(|_| None, Some))
+                    .and_then(|op| bitcoin::OutPoint::from_str(op).ok())
                     .ok_or_else(|| {
                         Error::invalid_params(format!(
                             "Invalid value {} in 'outpoints' parameter.",