chore: address Rust 1.75 clippy lints

crates/common_utils/src/request.rs

@@ -138,7 +138,7 @@ impl RequestBuilder {
     }
 
     pub fn headers(mut self, headers: Vec<(String, Maskable<String>)>) -> Self {
-        let mut h = headers.into_iter().map(|(h, v)| (h, v));
+        let mut h = headers.into_iter();
         self.headers.extend(&mut h);
         self
     }

crates/kgraph_utils/src/mca.rs

@@ -156,7 +156,7 @@ fn compile_request_pm_types(
 
         let or_node_neighbor_id = if amount_nodes.len() == 1 {
             amount_nodes
-                .get(0)
+                .first()
                 .copied()
                 .ok_or(KgraphError::IndexingError)?
         } else {

crates/masking/src/diesel.rs

@@ -2,7 +2,6 @@
 //! Diesel-related.
 //!
 
-pub use diesel::Expression;
 use diesel::{
     backend::Backend,
     deserialize::{self, FromSql, Queryable},

crates/masking/src/serde.rs

@@ -3,7 +3,7 @@
 //!
 
 pub use erased_serde::Serialize as ErasedSerialize;
-pub use serde::{de, ser, Deserialize, Serialize, Serializer};
+pub use serde::{de, Deserialize, Serialize, Serializer};
 use serde_json::{value::Serializer as JsonValueSerializer, Value};
 
 use crate::{Secret, Strategy, StrongSecret, ZeroizableSecret};

crates/redis_interface/src/lib.rs

@@ -28,7 +28,7 @@ pub use fred::interfaces::PubsubInterface;
 use fred::{interfaces::ClientLike, prelude::EventInterface};
 use router_env::logger;
 
-pub use self::{commands::*, types::*};
+pub use self::types::*;
 
 pub struct RedisConnectionPool {
     pub pool: fred::prelude::RedisPool,

crates/router/src/configs/settings.rs

@@ -556,7 +556,7 @@ impl From<Database> for storage_impl::config::Database {
             dbname: val.dbname,
             pool_size: val.pool_size,
             connection_timeout: val.connection_timeout,
-            queue_strategy: val.queue_strategy.into(),
+            queue_strategy: val.queue_strategy,
             min_idle: val.min_idle,
             max_lifetime: val.max_lifetime,
         }

crates/router/src/connector/braintree/braintree_graphql_transformers.rs

@@ -297,11 +297,11 @@ fn build_error_response<T>(
 
     get_error_response(
         response
-            .get(0)
+            .first()
             .and_then(|err_details| err_details.extensions.as_ref())
             .and_then(|extensions| extensions.legacy_code.clone()),
         response
-            .get(0)
+            .first()
             .map(|err_details| err_details.message.clone()),
         reason,
         http_code,

crates/router/src/connector/checkout/transformers.rs

@@ -1026,10 +1026,7 @@ impl utils::MultipleCaptureSyncResponse for Box<PaymentsResponse> {
         self.status == CheckoutPaymentStatus::Captured
     }
     fn get_amount_captured(&self) -> Option<i64> {
-        match self.amount {
-            Some(amount) => amount.try_into().ok(),
-            None => None,
-        }
+        self.amount.map(|amount| amount.into())
     }
 }
 

crates/router/src/connector/stripe/transformers.rs

@@ -2336,7 +2336,7 @@ pub fn get_connector_metadata(
     let next_action_response = next_action
         .and_then(|next_action_response| match next_action_response {
             StripeNextActionResponse::DisplayBankTransferInstructions(response) => {
-                let bank_instructions = response.financial_addresses.get(0);
+                let bank_instructions = response.financial_addresses.first();
                 let (sepa_bank_instructions, bacs_bank_instructions) =
                     bank_instructions.map_or((None, None), |financial_address| {
                         (

crates/router/src/connector/utils.rs

@@ -1508,86 +1508,6 @@ pub fn get_error_code_error_message_based_on_priority(
         .cloned()
 }
 
-#[cfg(test)]
-mod error_code_error_message_tests {
-    #![allow(clippy::unwrap_used)]
-    use super::*;
-
-    struct TestConnector;
-
-    impl ConnectorErrorTypeMapping for TestConnector {
-        fn get_connector_error_type(
-            &self,
-            error_code: String,
-            error_message: String,
-        ) -> ConnectorErrorType {
-            match (error_code.as_str(), error_message.as_str()) {
-                ("01", "INVALID_MERCHANT") => ConnectorErrorType::BusinessError,
-                ("03", "INVALID_CVV") => ConnectorErrorType::UserError,
-                ("04", "04") => ConnectorErrorType::TechnicalError,
-                _ => ConnectorErrorType::UnknownError,
-            }
-        }
-    }
-
-    #[test]
-    fn test_get_error_code_error_message_based_on_priority() {
-        let error_code_message_list_unknown = vec![
-            ErrorCodeAndMessage {
-                error_code: "01".to_string(),
-                error_message: "INVALID_MERCHANT".to_string(),
-            },
-            ErrorCodeAndMessage {
-                error_code: "05".to_string(),
-                error_message: "05".to_string(),
-            },
-            ErrorCodeAndMessage {
-                error_code: "03".to_string(),
-                error_message: "INVALID_CVV".to_string(),
-            },
-            ErrorCodeAndMessage {
-                error_code: "04".to_string(),
-                error_message: "04".to_string(),
-            },
-        ];
-        let error_code_message_list_user = vec![
-            ErrorCodeAndMessage {
-                error_code: "01".to_string(),
-                error_message: "INVALID_MERCHANT".to_string(),
-            },
-            ErrorCodeAndMessage {
-                error_code: "03".to_string(),
-                error_message: "INVALID_CVV".to_string(),
-            },
-        ];
-        let error_code_error_message_unknown = get_error_code_error_message_based_on_priority(
-            TestConnector,
-            error_code_message_list_unknown,
-        );
-        let error_code_error_message_user = get_error_code_error_message_based_on_priority(
-            TestConnector,
-            error_code_message_list_user,
-        );
-        let error_code_error_message_none =
-            get_error_code_error_message_based_on_priority(TestConnector, vec![]);
-        assert_eq!(
-            error_code_error_message_unknown,
-            Some(ErrorCodeAndMessage {
-                error_code: "05".to_string(),
-                error_message: "05".to_string(),
-            })
-        );
-        assert_eq!(
-            error_code_error_message_user,
-            Some(ErrorCodeAndMessage {
-                error_code: "03".to_string(),
-                error_message: "INVALID_CVV".to_string(),
-            })
-        );
-        assert_eq!(error_code_error_message_none, None);
-    }
-}
-
 pub trait MultipleCaptureSyncResponse {
     fn get_connector_capture_id(&self) -> String;
     fn get_capture_attempt_status(&self) -> enums::AttemptStatus;
@@ -1781,3 +1701,83 @@ impl FrmTransactionRouterDataRequest for fraud_check::FrmTransactionRouterData {
         }
     }
 }
+
+#[cfg(test)]
+mod error_code_error_message_tests {
+    #![allow(clippy::unwrap_used)]
+    use super::*;
+
+    struct TestConnector;
+
+    impl ConnectorErrorTypeMapping for TestConnector {
+        fn get_connector_error_type(
+            &self,
+            error_code: String,
+            error_message: String,
+        ) -> ConnectorErrorType {
+            match (error_code.as_str(), error_message.as_str()) {
+                ("01", "INVALID_MERCHANT") => ConnectorErrorType::BusinessError,
+                ("03", "INVALID_CVV") => ConnectorErrorType::UserError,
+                ("04", "04") => ConnectorErrorType::TechnicalError,
+                _ => ConnectorErrorType::UnknownError,
+            }
+        }
+    }
+
+    #[test]
+    fn test_get_error_code_error_message_based_on_priority() {
+        let error_code_message_list_unknown = vec![
+            ErrorCodeAndMessage {
+                error_code: "01".to_string(),
+                error_message: "INVALID_MERCHANT".to_string(),
+            },
+            ErrorCodeAndMessage {
+                error_code: "05".to_string(),
+                error_message: "05".to_string(),
+            },
+            ErrorCodeAndMessage {
+                error_code: "03".to_string(),
+                error_message: "INVALID_CVV".to_string(),
+            },
+            ErrorCodeAndMessage {
+                error_code: "04".to_string(),
+                error_message: "04".to_string(),
+            },
+        ];
+        let error_code_message_list_user = vec![
+            ErrorCodeAndMessage {
+                error_code: "01".to_string(),
+                error_message: "INVALID_MERCHANT".to_string(),
+            },
+            ErrorCodeAndMessage {
+                error_code: "03".to_string(),
+                error_message: "INVALID_CVV".to_string(),
+            },
+        ];
+        let error_code_error_message_unknown = get_error_code_error_message_based_on_priority(
+            TestConnector,
+            error_code_message_list_unknown,
+        );
+        let error_code_error_message_user = get_error_code_error_message_based_on_priority(
+            TestConnector,
+            error_code_message_list_user,
+        );
+        let error_code_error_message_none =
+            get_error_code_error_message_based_on_priority(TestConnector, vec![]);
+        assert_eq!(
+            error_code_error_message_unknown,
+            Some(ErrorCodeAndMessage {
+                error_code: "05".to_string(),
+                error_message: "05".to_string(),
+            })
+        );
+        assert_eq!(
+            error_code_error_message_user,
+            Some(ErrorCodeAndMessage {
+                error_code: "03".to_string(),
+                error_message: "INVALID_CVV".to_string(),
+            })
+        );
+        assert_eq!(error_code_error_message_none, None);
+    }
+}

crates/router/src/connector/wise.rs

@@ -90,7 +90,7 @@ impl ConnectorCommon for Wise {
         let default_status = response.status.unwrap_or_default().to_string();
         match response.errors {
             Some(errs) => {
-                if let Some(e) = errs.get(0) {
+                if let Some(e) = errs.first() {
                     Ok(types::ErrorResponse {
                         status_code: res.status_code,
                         code: e.code.clone(),
@@ -301,7 +301,7 @@ impl services::ConnectorIntegration<api::PoCancel, types::PayoutsData, types::Pa
             .change_context(errors::ConnectorError::ResponseDeserializationFailed)?;
         let def_res = response.status.unwrap_or_default().to_string();
         let errors = response.errors.unwrap_or_default();
-        let (code, message) = if let Some(e) = errors.get(0) {
+        let (code, message) = if let Some(e) = errors.first() {
             (e.code.clone(), e.message.clone())
         } else {
             (def_res, response.message.unwrap_or_default())

crates/router/src/core/fraud_check.rs

@@ -306,21 +306,21 @@ where
                             // Panic Safety: we are first checking if the object is present... only if present, we try to fetch index 0
                             let frm_configs_object = FrmConfigsObject {
                                 frm_enabled_gateway: filtered_frm_config
-                                    .get(0)
+                                    .first()
                                     .and_then(|c| c.gateway),
                                 frm_enabled_pm: filtered_payment_methods
-                                    .get(0)
+                                    .first()
                                     .and_then(|pm| pm.payment_method),
                                 frm_enabled_pm_type: filtered_payment_method_types
-                                    .get(0)
+                                    .first()
                                     .and_then(|pmt| pmt.payment_method_type),
                                 frm_action: filtered_payment_method_types
                                     // .clone()
-                                    .get(0)
+                                    .first()
                                     .map(|pmt| pmt.action.clone())
                                     .unwrap_or(api_enums::FrmAction::ManualReview),
                                 frm_preferred_flow_type: filtered_payment_method_types
-                                    .get(0)
+                                    .first()
                                     .map(|pmt| pmt.flow.clone())
                                     .unwrap_or(api_enums::FrmPreferredFlowTypes::Pre),
                             };

crates/router/src/core/payments.rs

@@ -2160,7 +2160,6 @@ pub async fn apply_filters_on_payments(
         .await
         .to_not_found_response(errors::ApiErrorResponse::PaymentNotFound)?
         .into_iter()
-        .map(|(pi, pa)| (pi, pa))
         .collect();
 
     let data: Vec<api::PaymentsResponse> =

crates/router/src/core/payments/transformers.rs

@@ -547,7 +547,7 @@ where
                 if third_party_sdk_session_next_action(&payment_attempt, operation) {
                     next_action_response = Some(
                         api_models::payments::NextActionData::ThirdPartySdkSessionToken {
-                            session_token: payment_data.sessions_token.get(0).cloned(),
+                            session_token: payment_data.sessions_token.first().cloned(),
                         },
                     )
                 }

crates/router/src/db/dispute.rs

@@ -572,7 +572,7 @@ mod tests {
 
             assert_eq!(1, found_disputes.len());
 
-            assert_eq!(created_dispute, found_disputes.get(0).unwrap().clone());
+            assert_eq!(created_dispute, found_disputes.first().unwrap().clone());
         }
 
         #[tokio::test]
@@ -611,7 +611,7 @@ mod tests {
 
             assert_eq!(1, found_disputes.len());
 
-            assert_eq!(created_dispute, found_disputes.get(0).unwrap().clone());
+            assert_eq!(created_dispute, found_disputes.first().unwrap().clone());
         }
 
         mod update_dispute {

crates/router/src/macros.rs

@@ -1,4 +1 @@
-pub use common_utils::{
-    async_spawn, collect_missing_value_keys, fallback_reverse_lookup_not_found, newtype,
-    newtype_impl,
-};
+pub use common_utils::{collect_missing_value_keys, newtype};