fix(gas_price_service): service name and unused trait impl (#2317)

## Linked Issues/PRs
<!-- List of related issues/PRs -->
- none

## Description
<!-- List of detailed changes -->
Unused trait impl `RunnableService` moved to tests where it's actually
used.

## Checklist
- [x] Breaking changes are clearly marked as such in the PR description
and changelog
- [x] New behavior is reflected in tests
- [x] [The specification](https://github.com/FuelLabs/fuel-specs/)
matches the implemented behavior (link update PR if changes are needed)

### Before requesting review
- [x] I have reviewed the code myself
- [ ] I have created follow-up issues caused by this PR and linked them
here

### After merging, notify other teams

[Add or remove entries as needed]

- [ ] [Rust SDK](https://github.com/FuelLabs/fuels-rs/)
- [ ] [Sway compiler](https://github.com/FuelLabs/sway/)
- [ ] [Platform
documentation](https://github.com/FuelLabs/devrel-requests/issues/new?assignees=&labels=new+request&projects=&template=NEW-REQUEST.yml&title=%5BRequest%5D%3A+)
(for out-of-organization contributors, the person merging the PR will do
this)
- [ ] Someone else?

crates/services/gas_price_service/src/v0/service.rs

@@ -10,7 +10,6 @@ use crate::{
 use anyhow::anyhow;
 use async_trait::async_trait;
 use fuel_core_services::{
-    RunnableService,
     RunnableTask,
     StateWatcher,
 };
@@ -116,32 +115,6 @@ where
     }
 }
 
-#[async_trait]
-impl<L2, Metadata> RunnableService for GasPriceServiceV0<L2, Metadata>
-where
-    L2: L2BlockSource,
-    Metadata: MetadataStorage,
-{
-    const NAME: &'static str = "GasPriceServiceV0";
-    type SharedData = SharedV0Algorithm;
-    type Task = Self;
-    type TaskParams = ();
-
-    fn shared_data(&self) -> Self::SharedData {
-        self.shared_algo.clone()
-    }
-
-    async fn into_task(
-        mut self,
-        _state_watcher: &StateWatcher,
-        _params: Self::TaskParams,
-    ) -> anyhow::Result<Self::Task> {
-        let algorithm = self.algorithm_updater.algorithm();
-        self.shared_algo.update(algorithm).await;
-        Ok(self)
-    }
-}
-
 #[async_trait]
 impl<L2, Metadata> RunnableTask for GasPriceServiceV0<L2, Metadata>
 where
@@ -194,17 +167,48 @@ mod tests {
         v0::{
             metadata::V0Metadata,
             service::GasPriceServiceV0,
-            uninitialized_task::initialize_algorithm,
+            uninitialized_task::{
+                initialize_algorithm,
+                SharedV0Algorithm,
+            },
         },
     };
     use fuel_core_services::{
+        RunnableService,
         Service,
         ServiceRunner,
+        StateWatcher,
     };
     use fuel_core_types::fuel_types::BlockHeight;
     use std::sync::Arc;
     use tokio::sync::mpsc;
 
+    #[async_trait::async_trait]
+    impl<L2, Metadata> RunnableService for GasPriceServiceV0<L2, Metadata>
+    where
+        L2: L2BlockSource,
+        Metadata: MetadataStorage,
+    {
+        const NAME: &'static str = "GasPriceServiceV0";
+        type SharedData = SharedV0Algorithm;
+        type Task = Self;
+        type TaskParams = ();
+
+        fn shared_data(&self) -> Self::SharedData {
+            self.shared_algo.clone()
+        }
+
+        async fn into_task(
+            mut self,
+            _state_watcher: &StateWatcher,
+            _params: Self::TaskParams,
+        ) -> anyhow::Result<Self::Task> {
+            let algorithm = self.algorithm_updater.algorithm();
+            self.shared_algo.update(algorithm).await;
+            Ok(self)
+        }
+    }
+
     struct FakeL2BlockSource {
         l2_block: mpsc::Receiver<BlockInfo>,
     }

crates/services/gas_price_service/src/v0/uninitialized_task.rs

@@ -190,7 +190,7 @@ where
         GasPriceData + Modifiable + KeyValueInspect<Column = GasPriceColumn> + Clone,
     SettingsProvider: GasPriceSettingsProvider,
 {
-    const NAME: &'static str = "UninitializedGasPriceServiceV0";
+    const NAME: &'static str = "GasPriceServiceV0";
     type SharedData = SharedV0Algorithm;
     type Task = GasPriceServiceV0<
         FuelL2BlockSource<SettingsProvider>,
@@ -360,13 +360,14 @@ where
         GasPriceData + Modifiable + KeyValueInspect<Column = GasPriceColumn> + Clone,
     SettingsProvider: GasPriceSettingsProvider,
 {
-    let gas_price_init = UninitializedTask::new(
+    // lazy initialization of gas price service, delegate to parent
+    let gas_price_uninit = UninitializedTask::new(
         config,
         genesis_block_height,
         settings,
         block_stream,
         gas_price_db,
         on_chain_db,
     )?;
-    Ok(ServiceRunner::new(gas_price_init))
+    Ok(ServiceRunner::new(gas_price_uninit))
 }