diff --git a/query-engine/connector-test-kit-rs/query-tests-setup/src/runner/direct.rs b/query-engine/connector-test-kit-rs/query-tests-setup/src/runner/direct.rs
index 449189f9cb3b..c95b2c40ff39 100644
--- a/query-engine/connector-test-kit-rs/query-tests-setup/src/runner/direct.rs
+++ b/query-engine/connector-test-kit-rs/query-tests-setup/src/runner/direct.rs
@@ -84,7 +84,7 @@ impl RunnerInterface for DirectRunner {
     ) -> TestResult<TxId> {
         let tx_opts = TransactionOptions::new(max_acquisition_millis, valid_for_millis, isolation_level);
 
-        let id = self.executor.start_tx(self.query_schema.clone(), &tx_opts).await?;
+        let id = self.executor.start_tx(self.query_schema.clone(), tx_opts).await?;
         Ok(id)
     }
 
diff --git a/query-engine/core/src/executor/interpreting_executor.rs b/query-engine/core/src/executor/interpreting_executor.rs
index e00dd8e5dd9e..c678f264af42 100644
--- a/query-engine/core/src/executor/interpreting_executor.rs
+++ b/query-engine/core/src/executor/interpreting_executor.rs
@@ -143,9 +143,9 @@ impl<C> TransactionManager for InterpretingExecutor<C>
 where
     C: Connector + Send + Sync,
 {
-    async fn start_tx(&self, query_schema: QuerySchemaRef, tx_opts: &TransactionOptions) -> crate::Result<TxId> {
+    async fn start_tx(&self, query_schema: QuerySchemaRef, tx_opts: TransactionOptions) -> crate::Result<TxId> {
         super::with_request_now(async move {
-            let id = if let Some(predefined_tx_id) = tx_opts.new_tx_id.clone() {
+            let id = if let Some(predefined_tx_id) = tx_opts.new_tx_id {
                 predefined_tx_id.into()
             } else {
                 TxId::default()
@@ -165,7 +165,7 @@ where
             .await;
 
             let conn = conn.map_err(|_| TransactionError::AcquisitionTimeout)??;
-            let c_tx = OpenTx::start(conn, tx_opts.isolation_level.clone()).await?;
+            let c_tx = OpenTx::start(conn, tx_opts.isolation_level).await?;
 
             self.itx_manager
                 .create_tx(
diff --git a/query-engine/core/src/executor/mod.rs b/query-engine/core/src/executor/mod.rs
index c8074bf41626..2985919e27a8 100644
--- a/query-engine/core/src/executor/mod.rs
+++ b/query-engine/core/src/executor/mod.rs
@@ -69,8 +69,8 @@ pub struct TransactionOptions {
 
     /// An optional pre-defined transaction id. Some value might be provided in case we want to generate
     /// a new id at the beginning of the transaction
-    #[serde(default)]
-    pub new_tx_id: Option<String>,
+    #[serde(skip_deserializing)]
+    pub new_tx_id: Option<TxId>,
 }
 
 impl TransactionOptions {
@@ -87,7 +87,7 @@ impl TransactionOptions {
     /// of self with the new predefined_id set.
     pub fn with_new_transaction_id(&mut self) -> TxId {
         let tx_id: TxId = Default::default();
-        self.new_tx_id = Some(tx_id.to_string());
+        self.new_tx_id = Some(tx_id.clone());
         tx_id
     }
 }
@@ -98,7 +98,7 @@ pub trait TransactionManager {
     /// Expected to throw an error if no transaction could be opened for `opts.max_acquisition_millis` milliseconds.
     /// The new transaction must only live for `opts.valid_for_millis` milliseconds before it automatically rolls back.
     /// This rollback mechanism is an implementation detail of the trait implementer.
-    async fn start_tx(&self, query_schema: QuerySchemaRef, opts: &TransactionOptions) -> crate::Result<TxId>;
+    async fn start_tx(&self, query_schema: QuerySchemaRef, opts: TransactionOptions) -> crate::Result<TxId>;
 
     /// Commits a transaction.
     async fn commit_tx(&self, tx_id: TxId) -> crate::Result<()>;
diff --git a/query-engine/core/src/telemetry/helpers.rs b/query-engine/core/src/telemetry/helpers.rs
index e844f2b946e0..b62d0b72235f 100644
--- a/query-engine/core/src/telemetry/helpers.rs
+++ b/query-engine/core/src/telemetry/helpers.rs
@@ -10,7 +10,7 @@ use tracing_opentelemetry::OpenTelemetrySpanExt;
 use tracing_subscriber::EnvFilter;
 
 pub static SHOW_ALL_TRACES: Lazy<bool> = Lazy::new(|| match std::env::var("PRISMA_SHOW_ALL_TRACES") {
-    Ok(enabled) => enabled.to_lowercase() == *("true"),
+    Ok(enabled) => enabled.eq_ignore_ascii_case("true"),
     Err(_) => false,
 });
 
@@ -20,11 +20,7 @@ pub fn spans_to_json(spans: Vec<SpanData>) -> String {
         "span": true,
         "spans": json_spans
     });
-
-    match serde_json::to_string(&span_result) {
-        Ok(json_string) => json_string,
-        Err(_) => "".to_string(),
-    }
+    serde_json::to_string(&span_result).unwrap_or_default()
 }
 
 // set the parent context and return the traceparent
diff --git a/query-engine/query-engine-node-api/src/engine.rs b/query-engine/query-engine-node-api/src/engine.rs
index 20ce9ae58be8..b2e4a495fe42 100644
--- a/query-engine/query-engine-node-api/src/engine.rs
+++ b/query-engine/query-engine-node-api/src/engine.rs
@@ -337,7 +337,7 @@ impl QueryEngine {
                 let tx_opts: TransactionOptions = serde_json::from_str(&input)?;
                 match engine
                     .executor()
-                    .start_tx(engine.query_schema().clone(), &tx_opts)
+                    .start_tx(engine.query_schema().clone(), tx_opts)
                     .instrument(span)
                     .await
                 {
diff --git a/query-engine/query-engine/src/context.rs b/query-engine/query-engine/src/context.rs
index 42b00765bfb0..d09c38419f3f 100644
--- a/query-engine/query-engine/src/context.rs
+++ b/query-engine/query-engine/src/context.rs
@@ -44,7 +44,7 @@ impl ContextBuilder {
 
 impl PrismaContext {
     /// Initializes a new Prisma context.
-    pub async fn new(
+    async fn new(
         schema: psl::ValidatedSchema,
         enable_raw_queries: bool,
         metrics: MetricRegistry,
diff --git a/query-engine/query-engine/src/logger.rs b/query-engine/query-engine/src/logger.rs
index d1ec5f36ce6b..728b7c27a1a6 100644
--- a/query-engine/query-engine/src/logger.rs
+++ b/query-engine/query-engine/src/logger.rs
@@ -26,7 +26,7 @@ pub struct Logger {
 #[derive(Debug, Clone)]
 enum TracingConfig {
     // exposed means tracing will be exposed through an HTTP endpoint in a jaeger-compatible format
-    Exposed(String),
+    Http(String),
     // stdout means that traces will be printed to standard output
     Stdout,
     // disabled means that tracing will be disabled
@@ -67,7 +67,7 @@ impl Logger {
         };
 
         self.tracing_config = match (enable_telemetry, endpoint) {
-            (true, Some(endpoint)) => TracingConfig::Exposed(endpoint),
+            (true, Some(endpoint)) => TracingConfig::Http(endpoint),
             (true, None) => TracingConfig::Stdout,
             _ => TracingConfig::Disabled,
         };
@@ -100,7 +100,7 @@ impl Logger {
             .with(self.metrics.clone());
 
         match self.tracing_config {
-            TracingConfig::Exposed(ref endpoint) => {
+            TracingConfig::Http(ref endpoint) => {
                 // Opentelemetry is enabled, but capturing is disabled, there's an endpoint to export
                 // the traces to.
                 let resource = Resource::new(vec![KeyValue::new("service.name", self.service_name)]);
diff --git a/query-engine/query-engine/src/server/mod.rs b/query-engine/query-engine/src/server/mod.rs
index 925588d7dafc..02d161832c72 100644
--- a/query-engine/query-engine/src/server/mod.rs
+++ b/query-engine/query-engine/src/server/mod.rs
@@ -258,7 +258,7 @@ async fn transaction_start_handler(state: State, req: Request<Body>) -> Result<R
     let result = state
         .cx
         .executor
-        .start_tx(state.cx.query_schema().clone(), &tx_opts)
+        .start_tx(state.cx.query_schema().clone(), tx_opts)
         .instrument(span)
         .await;
 
@@ -369,19 +369,15 @@ fn traceparent(headers: &HeaderMap) -> Option<String> {
 
     let is_valid_traceparent = |s: &String| s.split_terminator('-').count() >= 4;
 
-    match &value {
-        Some(str) if is_valid_traceparent(str) => value,
-        _ => None,
-    }
+    value.filter(is_valid_traceparent)
 }
 
-#[allow(clippy::bind_instead_of_map)]
 fn transaction_id(headers: &HeaderMap) -> Option<TxId> {
     const TRANSACTION_ID_HEADER: &str = "X-transaction-id";
     headers
         .get(TRANSACTION_ID_HEADER)
         .and_then(|h| h.to_str().ok())
-        .and_then(|s| Some(TxId::from(s)))
+        .map(TxId::from)
 }
 
 /// If the client sends us a trace and span id, extracting a new context if the
diff --git a/query-engine/query-engine/src/state.rs b/query-engine/query-engine/src/state.rs
index 9e0d88991812..e380e3f5d05c 100644
--- a/query-engine/query-engine/src/state.rs
+++ b/query-engine/query-engine/src/state.rs
@@ -6,6 +6,7 @@ use std::sync::Arc;
 use tracing::Instrument;
 
 //// Shared application state.
+#[derive(Clone)]
 pub struct State {
     pub cx: Arc<PrismaContext>,
     pub enable_playground: bool,
@@ -33,23 +34,8 @@ impl State {
     }
 }
 
-impl Clone for State {
-    fn clone(&self) -> Self {
-        Self {
-            cx: self.cx.clone(),
-            enable_playground: self.enable_playground,
-            enable_debug_mode: self.enable_debug_mode,
-            enable_metrics: self.enable_metrics,
-        }
-    }
-}
-
 pub async fn setup(opts: &PrismaOpt, install_logger: bool, metrics: Option<MetricRegistry>) -> PrismaResult<State> {
-    let metrics = if metrics.is_none() {
-        MetricRegistry::new()
-    } else {
-        metrics.unwrap()
-    };
+    let metrics = metrics.unwrap_or_default();
 
     let mut logger = Logger::new("prisma-engine-http");
     logger.log_format(opts.log_format());
@@ -72,7 +58,7 @@ pub async fn setup(opts: &PrismaOpt, install_logger: bool, metrics: Option<Metri
     let enable_metrics = config.preview_features().contains(PreviewFeature::Metrics) || opts.dataproxy_metric_override;
     let span = tracing::info_span!("prisma:engine:connect");
 
-    let cx = PrismaContext::builder(datamodel) //  opts.enable_raw_queries, metrics, logs_capture)
+    let cx = PrismaContext::builder(datamodel)
         .set_metrics(metrics)
         .enable_raw_queries(opts.enable_raw_queries)
         .build()