merge #5512 again after reverting due to incorrect rebase (#5520)

* setup workspace global lints to prevent needless panics

* removed sources of panic in nym-crypto, nym-node and nym-api

* adjusted test code

Cargo.toml

@@ -437,3 +437,13 @@ opt-level = 'z'
 [profile.release.package.mix-fetch-wasm]
 # lto = true
 opt-level = 'z'
+
+[workspace.lints.clippy]
+unwrap_used = "deny"
+expect_used = "deny"
+todo = "deny"
+dbg_macro = "deny"
+exit = "deny"
+panic = "deny"
+unimplemented = "deny"
+unreachable = "deny"

clippy.toml

@@ -1,2 +1,3 @@
 allow-unwrap-in-tests = true
 allow-expect-in-tests = true
+allow-panic-in-tests = true

common/crypto/Cargo.toml

@@ -44,3 +44,6 @@ asymmetric = ["x25519-dalek", "ed25519-dalek", "zeroize"]
 hashing = ["blake3", "digest", "hkdf", "hmac", "generic-array", "sha2"]
 stream_cipher = ["aes", "ctr", "cipher", "generic-array"]
 sphinx = ["nym-sphinx-types/sphinx"]
+
+[lints]
+workspace = true

common/crypto/src/hmac.rs

@@ -16,8 +16,11 @@ pub fn compute_keyed_hmac<D>(key: &[u8], data: &[u8]) -> HmacOutput<D>
 where
     D: Digest + BlockSizeUser,
 {
-    let mut hmac = SimpleHmac::<D>::new_from_slice(key)
+    // SAFETY: hmac is fine with keys of any size; if they're smaller than the block size of the underlying
-        .expect("HMAC was instantiated with a key of an invalid size!");
+    // digest, they're padded with 0. if they're larger they're hashed and padded
+    // the reason for `Result` return type is due to the trait definition
+    #[allow(clippy::unwrap_used)]
+    let mut hmac = SimpleHmac::<D>::new_from_slice(key).unwrap();
     hmac.update(data);
     hmac.finalize()
 }
@@ -27,8 +30,11 @@ pub fn recompute_keyed_hmac_and_verify_tag<D>(key: &[u8], data: &[u8], tag: &[u8
 where
     D: Digest + BlockSizeUser,
 {
-    let mut hmac = SimpleHmac::<D>::new_from_slice(key)
+    // SAFETY: hmac is fine with keys of any size; if they're smaller than the block size of the underlying
-        .expect("HMAC was instantiated with a key of an invalid size!");
+    // digest, they're padded with 0. if they're larger they're hashed and padded
+    // the reason for `Result` return type is due to the trait definition
+    #[allow(clippy::unwrap_used)]
+    let mut hmac = SimpleHmac::<D>::new_from_slice(key).unwrap();
     hmac.update(data);
 
     let tag_arr = Output::<D>::from_slice(tag);

common/crypto/src/shared_key.rs

@@ -27,12 +27,16 @@ where
     // after performing diffie-hellman we don't care about the private component anymore
     let dh_result = ephemeral_keypair.private_key().diffie_hellman(remote_key);
 
-    // there is no reason for this to fail as our okm is expected to be only C::KeySize bytes
+    // SAFETY: while this is a relatively weak assumption, it's unlikely that any stream cipher has `C::key_size()`
+    // larger than 255 * chunk_size of the digest (so for example keys larger than 8160 bytes if sh256 is used)
+    #[allow(clippy::expect_used)]
     let okm = hkdf::extract_then_expand::<D>(None, &dh_result, None, C::key_size())
         .expect("somehow too long okm was provided");
 
-    let derived_shared_key =
+    // SAFETY: the generated okm has exactly `C::key_size()` elements,
-        Key::<C>::from_exact_iter(okm).expect("okm was expanded to incorrect length!");
+    // so this call is safe
+    #[allow(clippy::unwrap_used)]
+    let derived_shared_key = Key::<C>::from_exact_iter(okm).unwrap();
 
     (ephemeral_keypair, derived_shared_key)
 }
@@ -48,9 +52,14 @@ where
 {
     let dh_result = local_key.diffie_hellman(remote_key);
 
-    // there is no reason for this to fail as our okm is expected to be only C::KeySize bytes
+    // SAFETY: while this is a relatively weak assumption, it's unlikely that any stream cipher has `C::key_size()`
+    // larger than 255 * chunk_size of the digest (so for example keys larger than 8160 bytes if sh256 is used)
+    #[allow(clippy::expect_used)]
     let okm = hkdf::extract_then_expand::<D>(None, &dh_result, None, C::key_size())
         .expect("somehow too long okm was provided");
 
-    Key::<C>::from_exact_iter(okm).expect("okm was expanded to incorrect length!")
+    // SAFETY: the generated okm has exactly `C::key_size()` elements,
+    // so this call is safe
+    #[allow(clippy::unwrap_used)]
+    Key::<C>::from_exact_iter(okm).unwrap()
 }

common/crypto/src/symmetric/stream_cipher.rs

@@ -60,20 +60,15 @@ where
     Iv::<C>::default()
 }
 
-pub fn iv_from_slice<C>(b: &[u8]) -> &IV<C>
+pub fn try_iv_from_slice<C>(b: &[u8]) -> Option<&IV<C>>
 where
     C: IvSizeUser,
 {
     if b.len() != C::iv_size() {
-        // `from_slice` would have caused a panic about this issue anyway.
+        None
-        // Now we at least have slightly more information
+    } else {
-        panic!(
+        Some(IV::<C>::from_slice(b))
-            "Tried to convert {} bytes to IV. Expected {}",
-            b.len(),
-            C::iv_size()
-        )
     }
-    IV::<C>::from_slice(b)
 }
 
 // TODO: there's really no way to use more parts of the keystream if it was required at some point.

common/nymsphinx/acknowledgements/src/identifier.rs

@@ -2,7 +2,9 @@
 // SPDX-License-Identifier: Apache-2.0
 
 use crate::AckKey;
-use nym_crypto::symmetric::stream_cipher::{self, encrypt, iv_from_slice, random_iv, IvSizeUser};
+use nym_crypto::symmetric::stream_cipher::{
+    self, encrypt, random_iv, try_iv_from_slice, IvSizeUser,
+};
 use nym_sphinx_params::{AckEncryptionAlgorithm, SerializedFragmentIdentifier, FRAG_ID_LEN};
 use rand::{CryptoRng, RngCore};
 
@@ -25,7 +27,11 @@ pub fn recover_identifier(
     iv_id_ciphertext: &[u8],
 ) -> Option<SerializedFragmentIdentifier> {
     let iv_size = AckEncryptionAlgorithm::iv_size();
-    let iv = iv_from_slice::<AckEncryptionAlgorithm>(&iv_id_ciphertext[..iv_size]);
+    if iv_id_ciphertext.len() < FRAG_ID_LEN + iv_size {
+        return None;
+    }
+
+    let iv = try_iv_from_slice::<AckEncryptionAlgorithm>(&iv_id_ciphertext[..iv_size])?;
 
     let id = stream_cipher::decrypt::<AckEncryptionAlgorithm>(
         key.inner(),

nym-api/Cargo.toml

@@ -141,3 +141,6 @@ cw3 = { workspace = true }
 cw-utils = { workspace = true }
 rand_chacha = { workspace = true }
 sha2 = "0.9"
+
+[lints]
+workspace = true

nym-api/build.rs

@@ -1,6 +1,9 @@
 use sqlx::{Connection, FromRow, SqliteConnection};
 use std::env;
 
+// it's fine if compilation fails
+#[allow(clippy::unwrap_used)]
+#[allow(clippy::expect_used)]
 #[tokio::main]
 async fn main() {
     let out_dir = env::var("OUT_DIR").unwrap();

nym-api/src/ecash/comm.rs

@@ -47,6 +47,8 @@ impl CachedEpoch {
         let now = OffsetDateTime::now_utc();
 
         let validity_duration = if let Some(epoch_finish) = epoch.deadline {
+            // SAFETY: values set in our contract are valid unix timestamps
+            #[allow(clippy::unwrap_used)]
             let state_end =
                 OffsetDateTime::from_unix_timestamp(epoch_finish.seconds() as i64).unwrap();
             let until_epoch_state_end = state_end - now;
@@ -103,7 +105,7 @@ impl APICommunicationChannel for QueryCommunicationChannel {
         drop(guard);
         let guard = self.update_epoch_cache().await?;
 
-        return Ok(guard.current_epoch.epoch_id);
+        Ok(guard.current_epoch.epoch_id)
     }
 
     // TODO: perhaps this should be returning a ReadGuard instead?

nym-api/src/ecash/dkg/controller/mod.rs

@@ -189,7 +189,10 @@ impl<R: RngCore + CryptoRng + Clone> DkgController<R> {
             self.state.clear_previous_epoch(epoch_id);
 
             // SAFETY: we just accessed this item in an immutable way, thus it MUST exist so the unwrap is fine
-            self.state.in_progress_state_mut(epoch_id).unwrap().entered = true;
+            #[allow(clippy::unwrap_used)]
+            {
+                self.state.in_progress_state_mut(epoch_id).unwrap().entered = true;
+            }
         }
 
         // so at this point we don't need to be polling the contract so often anymore, but we can't easily

nym-api/src/ecash/dkg/dealing.rs

@@ -204,8 +204,9 @@ impl<R: RngCore + CryptoRng> DkgController<R> {
                 chunk_dealing(*dealing_index, dealing.to_bytes(), Self::DEALING_CHUNK_SIZE);
             for chunk_index in needs_resubmission {
                 // this is a hard failure, panic level, actually.
-                // because we have already committed to dealings of particular size
+                // because we have already committed to dealings of particular size,
                 // yet we don't have relevant chunks after chunking
+                #[allow(clippy::expect_used)]
                 let chunk = chunks
                     .remove(chunk_index)
                     .expect("chunking specification has changed mid-exchange!");

nym-api/src/ecash/dkg/key_derivation.rs

@@ -177,6 +177,8 @@ impl<R: RngCore + CryptoRng> DkgController<R> {
         // SAFETY:
         // since this share appears as 'verified' on the chain, it means the consensus of dealers confirmed its validity
         // and thus they must have been able to parse it, so the unwrap/expect here is fine
+        // (unless quorum of validators is malicious, but at that point we have bigger problems...)
+        #[allow(clippy::expect_used)]
         Ok(Some(
             VerificationKeyAuth::try_from_bs58(&share.share)
                 .expect("failed to deserialize VERIFIED key"),
@@ -415,6 +417,7 @@ impl<R: RngCore + CryptoRng> DkgController<R> {
 
             // SAFETY: combining shares can only fail if we have different number shares and indices
             // however, we returned an explicit error if decryption of any share failed and thus we know those values must match
+            #[allow(clippy::unwrap_used)]
             let secret = combine_shares(shares, &all_dealers).unwrap();
             if derived_x.is_none() {
                 derived_x = Some(secret)
@@ -426,6 +429,7 @@ impl<R: RngCore + CryptoRng> DkgController<R> {
         // SAFETY:
         // we know we had a non-empty map of dealings and thus, at the very least, we must have derived a single secret
         // (i.e. the x-element)
+        #[allow(clippy::unwrap_used)]
         let sk = SecretKeyAuth::create_from_raw(derived_x.unwrap(), derived_secrets);
         let derived_vk = sk.verification_key();
 

nym-api/src/ecash/state/mod.rs

@@ -140,6 +140,9 @@ impl EcashState {
         }
     }
 
+    // whilst we normally don't want to panic, this one would only occur at startup,
+    // if some logical invariants got broken (which have to be fixed in code anyway)
+    #[allow(clippy::panic)]
     pub(crate) fn spawn_background_cleaner(&mut self) {
         match std::mem::take(&mut self.background_cleaner_state) {
             BackgroundCleanerState::WaitingStartup(cleaner) => {
@@ -147,8 +150,6 @@ impl EcashState {
                     _handle: cleaner.start(),
                 }
             }
-            // whilst we normally don't want to panic, this one would only occur at startup,
-            // if some logical invariants got broken (which have to be fixed in code anyway)
             _ => panic!("attempted to spawn background cleaner more than once"),
         }
     }

nym-api/src/ecash/storage/helpers.rs

@@ -13,6 +13,9 @@ struct StorageBorrowedSerdeWrapper<'a, T>(&'a T);
 #[derive(Serialize, Deserialize)]
 struct StorageSerdeWrapper<T>(T);
 
+// SAFETY: we're not using custom serialiser for AnnotatedCoinIndexSignature
+// and we're within bound limits
+#[allow(clippy::unwrap_used)]
 pub(crate) fn serialise_coin_index_signatures(sigs: &[AnnotatedCoinIndexSignature]) -> Vec<u8> {
     storage_serialiser()
         .serialize(&StorageBorrowedSerdeWrapper(&sigs))
@@ -28,6 +31,9 @@ pub(crate) fn deserialise_coin_index_signatures(
     Ok(de.0)
 }
 
+// SAFETY: we're not using custom serialiser for AnnotatedExpirationDateSignature
+// and we're within bound limits
+#[allow(clippy::unwrap_used)]
 pub(crate) fn serialise_expiration_date_signatures(
     sigs: &[AnnotatedExpirationDateSignature],
 ) -> Vec<u8> {

nym-api/src/ecash/tests/mod.rs

@@ -428,27 +428,27 @@ impl FakeChainState {
                 );
                 let epoch_id = self.dkg_contract.epoch.epoch_id;
                 let Some(shares) = self.dkg_contract.verification_shares.get_mut(&epoch_id) else {
-                    unimplemented!("no shares for epoch")
+                    panic!("no shares for epoch")
                 };
                 let Some(share) = shares.get_mut(owner.as_str()) else {
-                    unimplemented!("no shares for owner")
+                    panic!("no shares for owner")
                 };
                 share.verified = true
             }
-            other => unimplemented!("unimplemented exec of {other:?}"),
+            other => panic!("unimplemented exec of {other:?}"),
         }
     }
 
     // TODO: make it return a result
     fn execute_contract_msg(&mut self, contract: &String, msg: &Binary, sender: MessageInfo) {
         if contract == &self.group_contract.address {
-            unimplemented!("group contract exec")
+            panic!("group contract exec")
         }
         if contract == &self.multisig_contract.address {
-            unimplemented!("multisig contract exec")
+            panic!("multisig contract exec")
         }
         if contract == &self.ecash_contract.address {
-            unimplemented!("bandwidth contract exec")
+            panic!("bandwidth contract exec")
         }
         if contract == self.dkg_contract.address.as_ref() {
             return self.execute_dkg_contract(sender, msg);
@@ -467,7 +467,7 @@ impl FakeChainState {
                 let sender = mock_info(sender_address.as_ref(), funds);
                 self.execute_contract_msg(contract_addr, msg, sender)
             }
-            other => unimplemented!("unimplemented wasm proposal for {other:?}"),
+            other => panic!("unimplemented wasm proposal for {other:?}"),
         }
     }
 
@@ -477,7 +477,7 @@ impl FakeChainState {
             CosmosMsg::Wasm(wasm_msg) => {
                 self.execute_wasm_msg(wasm_msg, Addr::unchecked(sender_address.as_ref()))
             }
-            other => unimplemented!("unimplemented proposal for {other:?}"),
+            other => panic!("unimplemented proposal for {other:?}"),
         };
     }
 }
@@ -907,7 +907,7 @@ impl super::client::Client for DummyClient {
         };
 
         if proposal.status != cw3::Status::Passed {
-            unimplemented!("proposal hasn't been passed")
+            panic!("proposal hasn't been passed")
         }
         proposal.status = cw3::Status::Executed;
 
@@ -954,7 +954,7 @@ impl super::client::Client for DummyClient {
         if !epoch_dealers.contains_key(self.validator_address.as_ref()) {
             epoch_dealers.insert(self.validator_address.to_string(), dealer_details);
         } else {
-            unimplemented!("already registered")
+            panic!("already registered")
         }
 
         let transaction_hash = guard._counters.next_tx_hash();

nym-api/src/epoch_operations/helpers.rs

@@ -105,8 +105,11 @@ impl EpochAdvancer {
         let standby_node_work_factor = global_rewarding_params.standby_node_work();
 
         // SANITY CHECK:
+        // SAFETY: 0 decimal places is within the range of `Decimal`
+        #[allow(clippy::unwrap_used)]
         let standby_share = Decimal::from_atomics(nodes.standby.len() as u128, 0).unwrap()
             * standby_node_work_factor;
+        #[allow(clippy::unwrap_used)]
         let active_share = Decimal::from_atomics(nodes.active_set_size() as u128, 0).unwrap()
             * active_node_work_factor;
         let total_work = standby_share + active_share;

nym-api/src/epoch_operations/rewarded_set_assignment.rs

@@ -139,6 +139,7 @@ impl EpochAdvancer {
         let mut layer2 = Vec::new();
         let mut layer3 = Vec::new();
 
+        #[allow(clippy::panic)]
         for (i, mix) in mixnodes_vec.iter().enumerate() {
             match i % 3 {
                 0 => layer1.push(*mix),
@@ -207,6 +208,7 @@ impl EpochAdvancer {
         let mut with_performance = Vec::new();
 
         // SAFETY: the cache MUST HAVE been initialised before now
+        #[allow(clippy::unwrap_used)]
         let described_cache = self.described_cache.get().await.unwrap();
 
         let Some(status_cache) = self.status_cache.node_annotations().await else {

nym-api/src/network_monitor/monitor/mod.rs

@@ -229,6 +229,8 @@ impl<R: MessageReceiver + Send + Sync> Monitor<R> {
                 // ideally we would blacklist all nodes regardless of the result so we would not use them anymore
                 // however, currently we have huge imbalance of gateways to mixnodes so we might accidentally
                 // discard working gateway because it was paired with broken mixnode
+                // SAFETY: the results is subset of candidates so the entry must exist
+                #[allow(clippy::unwrap_used)]
                 if *results.get(&candidate.id()).unwrap() {
                     // if the path is fully working, blacklist those nodes so we wouldn't construct
                     // any other path through any of those nodes

nym-api/src/network_monitor/monitor/preparer.rs

@@ -157,6 +157,7 @@ impl PacketPreparer {
         self.contract_cache.wait_for_initial_values().await;
         self.described_cache.naive_wait_for_initial_values().await;
 
+        #[allow(clippy::expect_used)]
         let described_nodes = self
             .described_cache
             .get()
@@ -374,6 +375,7 @@ impl PacketPreparer {
             .collect::<Vec<_>>();
 
         // the unwrap on `min()` is fine as we know the iterator is not empty
+        #[allow(clippy::unwrap_used)]
         let most_available = *[
             rand_l1.len(),
             rand_l2.len(),
@@ -427,6 +429,7 @@ impl PacketPreparer {
         // 1. the topology is definitely valid (otherwise we wouldn't be here)
         // 2. the recipient is specified (by calling **mix**_tester)
         // 3. the test message is not too long, i.e. when serialized it will fit in a single sphinx packet
+        #[allow(clippy::unwrap_used)]
         let mix_packets = plaintexts
             .into_iter()
             .map(|p| tester.wrap_plaintext_data(p, &topology, None).unwrap())
@@ -492,6 +495,7 @@ impl PacketPreparer {
     ) -> PreparedPackets {
         let (mixnodes, gateways) = self.all_legacy_mixnodes_and_gateways().await;
 
+        #[allow(clippy::expect_used)]
         let descriptions = self
             .described_cache
             .get()

nym-api/src/network_monitor/monitor/processor.rs

@@ -169,6 +169,9 @@ where
     where
         R: Sync + Send + 'static,
     {
+        // this panic could only be triggered by incorrect startup sequence and shouldn't affect
+        // the binary beyond that
+        #[allow(clippy::expect_used)]
         let mut receiver_task = self
             .receiver_task
             .take()

nym-api/src/network_monitor/monitor/receiver.rs

@@ -8,7 +8,7 @@ use futures::StreamExt;
 use nym_crypto::asymmetric::identity;
 use nym_gateway_client::{AcknowledgementReceiver, MixnetMessageReceiver};
 use nym_task::TaskClient;
-use tracing::trace;
+use tracing::{error, trace};
 
 pub(crate) type GatewayClientUpdateSender = mpsc::UnboundedSender<GatewayClientUpdate>;
 pub(crate) type GatewayClientUpdateReceiver = mpsc::UnboundedReceiver<GatewayClientUpdate>;
@@ -52,9 +52,9 @@ impl PacketReceiver {
     }
 
     fn process_gateway_messages(&self, messages: GatewayMessages) {
-        self.processor_sender
+        if self.processor_sender.unbounded_send(messages).is_err() {
-            .unbounded_send(messages)
+            error!("packet processor seems to have crashed!")
-            .expect("packet processor seems to have crashed!");
+        }
     }
 
     pub(crate) async fn run(&mut self, mut shutdown: TaskClient) {
@@ -66,7 +66,13 @@ impl PacketReceiver {
                 }
                 // unwrap here is fine as it can only return a `None` if the PacketSender has died
                 // and if that was the case, then the entire monitor is already in an undefined state
-                update = self.clients_updater.next() => self.process_gateway_update(update.unwrap()),
+                update = self.clients_updater.next() => {
+                    if let Some(update) = update {
+                        self.process_gateway_update(update)
+                    } else {
+                        error!("UpdateHandler: Client stream ended!");
+                    }
+                },
                 Some((_gateway_id, messages)) = self.gateways_reader.next() => {
                     self.process_gateway_messages(messages)
                 }

nym-api/src/network_monitor/monitor/sender.rs

@@ -246,6 +246,8 @@ impl PacketSender {
                 trace!("Sending {} packets...", mix_packets.len());
 
                 if mix_packets.len() == 1 {
+                    // SAFETY: we just explicitly checked we have 1 message
+                    #[allow(clippy::unwrap_used)]
                     client.send_mix_packet(mix_packets.pop().unwrap()).await?;
                 } else {
                     client.batch_send_mix_packets(mix_packets).await?;

nym-api/src/network_monitor/test_route/mod.rs

@@ -104,6 +104,7 @@ impl TestRoute {
 
         // the unwrap here is fine as the failure can only occur due to serialization and we're not
         // using any custom implementations
+        #[allow(clippy::unwrap_used)]
         NymApiTestMessageExt::new(self.id, ROUTE_TESTING_TEST_NONCE)
             .mix_plaintexts(mix, count as u32)
             .unwrap()

nym-api/src/node_status_api/models.rs

@@ -125,6 +125,8 @@ impl TryFrom<i64> for Uptime {
 
 impl From<Uptime> for Performance {
     fn from(uptime: Uptime) -> Self {
+        // SAFETY: uptime has a valid range to be transformed into a `Performance`
+        #[allow(clippy::unwrap_used)]
         Performance::from_percentage_value(uptime.0 as u64).unwrap()
     }
 }
@@ -481,6 +483,9 @@ pub enum NymApiStorageError {
     // this one would never be returned to users since it's only possible on startup
     #[error("failed to perform startup SQL migration - {0}")]
     StartupMigrationFailure(#[from] sqlx::migrate::MigrateError),
+
+    #[error("{value} is not a valid unix timestamp")]
+    InvalidTimestampProvided { value: i64 },
 }
 
 impl From<sqlx::Error> for NymApiStorageError {

nym-api/src/node_status_api/uptime_updater.rs

@@ -8,7 +8,8 @@ use crate::node_status_api::ONE_DAY;
 use crate::storage::NymApiStorage;
 use nym_task::{TaskClient, TaskManager};
 use std::time::Duration;
-use time::{OffsetDateTime, PrimitiveDateTime, Time};
+use time::macros::time;
+use time::{OffsetDateTime, PrimitiveDateTime};
 use tokio::time::{interval_at, Instant};
 use tracing::error;
 use tracing::{info, trace, warn};
@@ -75,18 +76,20 @@ impl HistoricalUptimeUpdater {
         // nodes update for different days
 
         // the unwrap is fine as 23:00:00 is a valid time
-        let update_time = Time::from_hms(23, 0, 0).unwrap();
+        let update_time = time!(23:00:00);
         let now = OffsetDateTime::now_utc();
         // is the current time within 0:00 - 22:59:59 or 23:00 - 23:59:59 ?
         let update_date = if now.hour() < 23 {
             now.date()
         } else {
             // the unwrap is fine as (**PRESUMABLY**) we're not running this code in the year 9999
+            #[allow(clippy::unwrap_used)]
             now.date().next_day().unwrap()
         };
         let update_datetime = PrimitiveDateTime::new(update_date, update_time).assume_utc();
         // the unwrap here is fine as we're certain `update_datetime` is in the future and thus the
         // resultant Duration is positive
+        #[allow(clippy::unwrap_used)]
         let time_left: Duration = (update_datetime - now).try_into().unwrap();
 
         info!(

nym-api/src/node_status_api/utils.rs

@@ -109,6 +109,7 @@ impl NodeUptimes {
 
         // the unwraps in Uptime::from_ratio are fine because it's impossible for us to have more "up" results
         // than total test runs as we just bounded them
+        #[allow(clippy::unwrap_used)]
         NodeUptimes {
             most_recent: most_recent.try_into().unwrap(),
             last_hour: Uptime::from_uptime_sum(last_hour_sum, last_hour_test_runs).unwrap(),

nym-api/src/nym_contract_cache/cache/refresher.rs

@@ -128,6 +128,7 @@ impl NymContractCacheRefresher {
             .collect();
 
         let mut gateways = Vec::with_capacity(gateway_bonds.len());
+        #[allow(clippy::panic)]
         for bond in gateway_bonds {
             // we explicitly panic here because that value MUST exist.
             // if it doesn't, we messed up the migration and we have big problems

nym-api/src/nym_nodes/handlers/unstable/helpers.rs

@@ -47,5 +47,8 @@ impl LegacyAnnotation for GatewayBondAnnotated {
 pub(crate) fn refreshed_at(
     iter: impl IntoIterator<Item = OffsetDateTime>,
 ) -> OffsetDateTimeJsonSchemaWrapper {
-    iter.into_iter().min().unwrap().into()
+    iter.into_iter()
+        .min()
+        .unwrap_or(OffsetDateTime::UNIX_EPOCH)
+        .into()
 }

nym-api/src/support/cli/run.rs

@@ -108,7 +108,7 @@ pub(crate) struct Args {
 async fn start_nym_api_tasks_axum(config: &Config) -> anyhow::Result<ShutdownHandles> {
     let task_manager = TaskManager::new(TASK_MANAGER_TIMEOUT_S);
 
-    let nyxd_client = nyxd::Client::new(config);
+    let nyxd_client = nyxd::Client::new(config)?;
     let connected_nyxd = config.get_nyxd_url();
     let nym_network_details = NymNetworkDetails::new_from_env();
     let network_details = NetworkDetails::new(connected_nyxd.to_string(), nym_network_details);

nym-api/src/support/config/mod.rs

@@ -268,6 +268,8 @@ pub struct Base {
 
 impl Base {
     pub fn new_default<S: Into<String>>(id: S) -> Self {
+        // SAFETY: the provided hardcoded value is well-formed
+        #[allow(clippy::expect_used)]
         let default_validator: Url = DEFAULT_LOCAL_VALIDATOR
             .parse()
             .expect("default local validator is malformed!");

nym-api/src/support/nyxd/mod.rs

@@ -4,7 +4,7 @@
 use crate::ecash::error::EcashError;
 use crate::epoch_operations::RewardedNodeWithParams;
 use crate::support::config::Config;
-use anyhow::Result;
+use anyhow::{Context, Result};
 use async_trait::async_trait;
 use cw3::{ProposalResponse, VoteResponse};
 use cw4::MemberResponse;
@@ -99,12 +99,13 @@ pub enum ClientInner {
 }
 
 impl Client {
-    pub(crate) fn new(config: &Config) -> Self {
+    pub(crate) fn new(config: &Config) -> anyhow::Result<Self> {
         let details = NymNetworkDetails::new_from_env();
         let nyxd_url = config.get_nyxd_url();
 
-        let client_config = nyxd::Config::try_from_nym_network_details(&details)
+        let client_config = nyxd::Config::try_from_nym_network_details(&details).context(
-            .expect("failed to construct valid validator client config with the provided network");
+            "failed to construct valid validator client config with the provided network",
+        )?;
 
         let inner = if let Some(mnemonic) = config.get_mnemonic() {
             ClientInner::Signing(
@@ -113,18 +114,18 @@ impl Client {
                     nyxd_url.as_str(),
                     mnemonic.clone(),
                 )
-                .expect("Failed to connect to nyxd!"),
+                .context("Failed to connect to nyxd!")?,
             )
         } else {
             ClientInner::Query(
                 QueryHttpRpcNyxdClient::connect(client_config, nyxd_url.as_str())
-                    .expect("Failed to connect to nyxd!"),
+                    .context("Failed to connect to nyxd!")?,
             )
         };
 
-        Client {
+        Ok(Client {
             inner: Arc::new(RwLock::new(inner)),
-        }
+        })
     }
 
     pub(crate) async fn read(&self) -> RwLockReadGuard<'_, ClientInner> {

nym-api/src/support/storage/mod.rs

@@ -225,9 +225,9 @@ impl NymApiStorage {
             .get_monitor_runs_count(day_ago, now.unix_timestamp())
             .await?;
 
-        let mixnode_identity = self.manager.get_mixnode_identity_key(mix_id).await?.expect(
+        let Some(mixnode_identity) = self.manager.get_mixnode_identity_key(mix_id).await? else {
-            "The node doesn't have an identity even though we have status information on it!",
+            return Err(NymApiStorageError::DatabaseInconsistency { reason: format!("The node {mix_id} doesn't have an identity even though we have status information on it!") });
-        );
+        };
 
         Ok(MixnodeStatusReport::construct_from_last_day_reports(
             now,
@@ -262,13 +262,9 @@ impl NymApiStorage {
             .get_monitor_runs_count(day_ago, now.unix_timestamp())
             .await?;
 
-        let gateway_identity = self
+        let Some(gateway_identity) = self.manager.get_gateway_identity_key(node_id).await? else {
-            .manager
+            return Err(NymApiStorageError::DatabaseInconsistency { reason: format!("The node {node_id} doesn't have an identity even though we have status information on it!") });
-            .get_gateway_identity_key(node_id)
+        };
-            .await?
-            .expect(
-                "The node doesn't have an identity even though we have status information on it!",
-            );
 
         Ok(GatewayStatusReport::construct_from_last_day_reports(
             now,
@@ -290,10 +286,9 @@ impl NymApiStorage {
             return Err(NymApiStorageError::MixnodeUptimeHistoryNotFound { mix_id });
         }
 
-        let mixnode_identity =
+        let Some(mixnode_identity) = self.manager.get_mixnode_identity_key(mix_id).await? else {
-            self.manager.get_mixnode_identity_key(mix_id).await?.expect(
+            return Err(NymApiStorageError::DatabaseInconsistency { reason: format!("The node {mix_id} doesn't have an identity even though we uptime history for it!") });
-                "The node doesn't have an identity even though we have uptime history for it!",
+        };
-            );
 
         Ok(MixnodeUptimeHistory::new(mix_id, mixnode_identity, history))
     }
@@ -536,6 +531,10 @@ impl NymApiStorage {
         start: i64,
         end: i64,
     ) -> Result<Vec<MixnodeStatusReport>, NymApiStorageError> {
+        let Ok(end_timestamp) = OffsetDateTime::from_unix_timestamp(end) else {
+            return Err(NymApiStorageError::InvalidTimestampProvided { value: end });
+        };
+
         if (end - start) as u64 != ONE_DAY.as_secs() {
             warn!("Our current interval length breaks the 24h length assumption")
         }
@@ -553,7 +552,7 @@ impl NymApiStorage {
             .into_iter()
             .map(|statuses| {
                 MixnodeStatusReport::construct_from_last_day_reports(
-                    OffsetDateTime::from_unix_timestamp(end).unwrap(),
+                    end_timestamp,
                     statuses.mix_id,
                     statuses.identity,
                     statuses.statuses,
@@ -579,6 +578,10 @@ impl NymApiStorage {
         start: i64,
         end: i64,
     ) -> Result<Vec<GatewayStatusReport>, NymApiStorageError> {
+        let Ok(end_timestamp) = OffsetDateTime::from_unix_timestamp(end) else {
+            return Err(NymApiStorageError::InvalidTimestampProvided { value: end });
+        };
+
         if (end - start) as u64 != ONE_DAY.as_secs() {
             warn!("Our current interval length breaks the 24h length assumption")
         }
@@ -596,7 +599,7 @@ impl NymApiStorage {
             .into_iter()
             .map(|statuses| {
                 GatewayStatusReport::construct_from_last_day_reports(
-                    OffsetDateTime::from_unix_timestamp(end).unwrap(),
+                    end_timestamp,
                     statuses.node_id,
                     statuses.identity,
                     statuses.statuses,

nym-node/Cargo.toml

@@ -98,3 +98,7 @@ nym-ip-packet-router = { path = "../service-providers/ip-packet-router" }
 [build-dependencies]
 # temporary bonding information v1 (to grab and parse nym-mixnode and nym-gateway package versions)
 cargo_metadata = { workspace = true }
+
+
+[lints]
+workspace = true

nym-node/src/cli/commands/sign.rs

@@ -68,6 +68,8 @@ fn print_signed_contract_msg(
     println!("{}", output.format(&sign_output));
 }
 
+// SAFETY: clippy ArgGroup ensures only a single branch is actually called
+#[allow(clippy::unreachable)]
 pub async fn execute(args: Args) -> Result<(), NymNodeError> {
     let config = try_load_current_config(args.config.config_path()).await?;
     let identity_keypair =

nym-node/src/node/metrics/aggregator.rs

@@ -45,6 +45,9 @@ impl MetricsAggregator {
         self.event_sender.clone()
     }
 
+    // we must panic here to terminate as soon as possible, because the underlying code
+    // has to be resolved as it implies some serious logic bugs
+    #[allow(clippy::panic)]
     pub fn register_handler<H>(&mut self, handler: H, update_interval: impl Into<Option<Duration>>)
     where
         H: MetricsHandler,

nym-node/src/node/metrics/handler/global_prometheus_updater/mod.rs

@@ -226,6 +226,8 @@ impl OnUpdateMetricsHandler for PrometheusGlobalNodeMetricsRegistryUpdater {
 impl MetricsHandler for PrometheusGlobalNodeMetricsRegistryUpdater {
     type Events = GlobalPrometheusData;
 
+    // SAFETY: `PrometheusNodeMetricsRegistryUpdater` doesn't have any associated events
+    #[allow(clippy::panic)]
     async fn handle_event(&mut self, _event: Self::Events) {
         panic!("this should have never been called! MetricsHandler has been incorrectly called on PrometheusNodeMetricsRegistryUpdater")
     }

nym-node/src/node/metrics/handler/legacy_packet_data.rs

@@ -62,6 +62,8 @@ impl OnUpdateMetricsHandler for LegacyMixingStatsUpdater {
 impl MetricsHandler for LegacyMixingStatsUpdater {
     type Events = LegacyMixingData;
 
+    // SAFETY: `LegacyMixingStatsUpdater` doesn't have any associated events
+    #[allow(clippy::panic)]
     async fn handle_event(&mut self, _event: Self::Events) {
         panic!("this should have never been called! MetricsHandler has been incorrectly called on LegacyMixingStatsUpdater")
     }

nym-node/src/node/metrics/handler/mixnet_data_cleaner.rs

@@ -101,6 +101,8 @@ impl OnUpdateMetricsHandler for MixnetMetricsCleaner {
 impl MetricsHandler for MixnetMetricsCleaner {
     type Events = StaleMixnetMetrics;
 
+    // SAFETY: `MixnetMetricsCleaner` doesn't have any associated events
+    #[allow(clippy::panic)]
     async fn handle_event(&mut self, _event: Self::Events) {
         panic!("this should have never been called! MetricsHandler has been incorrectly called on MixnetMetricsCleaner")
     }

nym-node/src/node/metrics/handler/pending_egress_packets_updater.rs

@@ -54,6 +54,8 @@ impl OnUpdateMetricsHandler for PendingEgressPacketsUpdater {
 impl MetricsHandler for PendingEgressPacketsUpdater {
     type Events = PendingEgressPackets;
 
+    // SAFETY: `PendingEgressPacketsUpdater` doesn't have any associated events
+    #[allow(clippy::panic)]
     async fn handle_event(&mut self, _event: Self::Events) {
         panic!("this should have never been called! MetricsHandler has been incorrectly called on PendingEgressPacketsUpdater")
     }