chore(gas_price_service_v0): remove unused trait impl (#2410)

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

## Description
<!-- List of detailed changes -->
`RunnableService` didn't need to be implemented for `GasPriceServiceV0`
even in the tests.

## 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
- [x] 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

@@ -165,48 +165,19 @@ mod tests {
         },
         ports::MetadataStorage,
         v0::{
-            algorithm::SharedV0Algorithm,
             metadata::V0AlgorithmConfig,
             service::GasPriceServiceV0,
             uninitialized_task::initialize_algorithm,
         },
     };
     use fuel_core_services::{
-        RunnableService,
-        Service,
-        ServiceRunner,
+        RunnableTask,
         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>,
     }
@@ -255,10 +226,12 @@ mod tests {
             gas_used: 60,
             block_gas_capacity: 100,
         };
+
         let (l2_block_sender, l2_block_receiver) = mpsc::channel(1);
         let l2_block_source = FakeL2BlockSource {
             l2_block: l2_block_receiver,
         };
+
         let metadata_storage = FakeMetadata::empty();
         let l2_block_height = 0;
         let config = V0AlgorithmConfig {
@@ -269,25 +242,23 @@ mod tests {
         };
         let (algo_updater, shared_algo) =
             initialize_algorithm(&config, l2_block_height, &metadata_storage).unwrap();
-
-        let service = GasPriceServiceV0::new(
+        let mut service = GasPriceServiceV0::new(
             l2_block_source,
             metadata_storage,
             shared_algo,
             algo_updater,
         );
         let read_algo = service.next_block_algorithm();
-        let service = ServiceRunner::new(service);
-        let prev = read_algo.next_gas_price();
+        let mut watcher = StateWatcher::default();
+        let initial_price = read_algo.next_gas_price();
 
         // when
-        service.start_and_await().await.unwrap();
+        service.run(&mut watcher).await.unwrap();
         l2_block_sender.send(l2_block).await.unwrap();
-        tokio::time::sleep(tokio::time::Duration::from_millis(10)).await;
+        service.shutdown().await.unwrap();
 
         // then
         let actual_price = read_algo.next_gas_price();
-        assert_ne!(prev, actual_price);
-        service.stop_and_await().await.unwrap();
+        assert_ne!(initial_price, actual_price);
     }
 }

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

@@ -37,8 +37,8 @@ use fuel_core_services::{
         BoxStream,
         IntoBoxStream,
     },
-    Service,
-    ServiceRunner,
+    RunnableTask,
+    StateWatcher,
 };
 use fuel_core_storage::{
     transactional::AtomicView,
@@ -59,7 +59,6 @@ use fuel_core_types::{
 use std::{
     ops::Deref,
     sync::Arc,
-    time::Duration,
 };
 use tokio::sync::mpsc::Receiver;
 
@@ -159,25 +158,25 @@ async fn next_gas_price__affected_by_new_l2_block() {
     let height = 0;
     let (algo_updater, shared_algo) =
         initialize_algorithm(&config, height, &metadata_storage).unwrap();
-    let service = GasPriceServiceV0::new(
+    let mut service = GasPriceServiceV0::new(
         l2_block_source,
         metadata_storage,
         shared_algo,
         algo_updater,
     );
-    let service = ServiceRunner::new(service);
-    let shared = service.shared.clone();
-    let initial = shared.next_gas_price();
+
+    let read_algo = service.next_block_algorithm();
+    let initial = read_algo.next_gas_price();
+    let mut watcher = StateWatcher::default();
 
     // when
-    service.start_and_await().await.unwrap();
+    service.run(&mut watcher).await.unwrap();
     l2_block_sender.send(l2_block).await.unwrap();
-    tokio::time::sleep(Duration::from_millis(10)).await;
+    service.shutdown().await.unwrap();
 
     // then
-    let new = shared.next_gas_price();
+    let new = read_algo.next_gas_price();
     assert_ne!(initial, new);
-    service.stop_and_await().await.unwrap();
 }
 
 #[tokio::test]
@@ -202,22 +201,25 @@ async fn next__new_l2_block_saves_old_metadata() {
     let (algo_updater, shared_algo) =
         initialize_algorithm(&config, height, &metadata_storage).unwrap();
 
-    let service = GasPriceServiceV0::new(
+    let mut service = GasPriceServiceV0::new(
         l2_block_source,
         metadata_storage,
         shared_algo,
         algo_updater,
     );
 
     // when
-    let service = ServiceRunner::new(service);
+    let read_algo = service.next_block_algorithm();
+    let mut watcher = StateWatcher::default();
+    let start = read_algo.next_gas_price();
 
-    service.start_and_await().await.unwrap();
+    service.run(&mut watcher).await.unwrap();
     l2_block_sender.send(l2_block).await.unwrap();
-    tokio::time::sleep(Duration::from_millis(10)).await;
+    service.shutdown().await.unwrap();
 
     // then
-    assert!(metadata_inner.lock().unwrap().is_some());
+    let new = read_algo.next_gas_price();
+    assert_ne!(start, new);
 }
 
 #[derive(Clone)]