Add syncronization for Gas Price Database and On Chain Database on st…

…artup (#2041)

Closes #2030

In the unlikely situation that the metadata db is behind the on chain
database, we should apply the values from each block to the algorithm
updater to produce reasonable values.

For now, we should be able to use the updater deterministically, but
this might become more difficult as we include the DA values in the
updater.

We also define the behavior for when the gas price db is beyond the
on-chain db. For now, we are assuming that the blocks produced with the
gas prices in the db were either reverted or not properly committed to
the on_chain db, and we just revert the gas price db to the height of
the on chain db. i.e. **the on chain db is the source of truth.**

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

### Before requesting review
- [ ] 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?

CHANGELOG.md

@@ -17,6 +17,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
         - "gas-price-threshold-percent" - the threshold percent for determining if the gas price will be increase or decreased
     And the following CLI flags are serving a new purpose
         - "min-gas-price" - the minimum gas price that the gas price algorithm will return
+- [2041](https://github.com/FuelLabs/fuel-core/pull/2041): Add code for startup of the gas price algorithm updater so 
+    the gas price db on startup is always in sync with the on chain db
+
 ## [Version 0.31.0]
 
 ### Added

crates/fuel-core/src/graphql_api/ports.rs

@@ -236,7 +236,7 @@ pub trait P2pPort: Send + Sync {
 #[async_trait::async_trait]
 pub trait GasPriceEstimate: Send + Sync {
     /// The worst case scenario for gas price at a given horizon
-    async fn worst_case_gas_price(&self, height: BlockHeight) -> u64;
+    async fn worst_case_gas_price(&self, height: BlockHeight) -> Option<u64>;
 }
 
 /// Trait for getting VM memory.

crates/fuel-core/src/schema/gas_price.rs

@@ -105,7 +105,10 @@ impl EstimateGasPriceQuery {
         let gas_price_provider = ctx.data_unchecked::<GasPriceProvider>();
         let gas_price = gas_price_provider
             .worst_case_gas_price(target_block.into())
-            .await;
+            .await
+            .ok_or(async_graphql::Error::new(format!(
+                "Failed to estimate gas price for block, algorithm not yet set: {target_block:?}"
+            )))?;
 
         Ok(EstimateGasPrice {
             gas_price: gas_price.into(),

crates/fuel-core/src/service/adapters/fuel_gas_price_provider.rs

@@ -7,7 +7,10 @@ use fuel_core_producer::block_producer::gas_price::GasPriceProvider as ProducerG
 use fuel_core_txpool::ports::GasPriceProvider as TxPoolGasPriceProvider;
 use fuel_core_types::{
     fuel_types::BlockHeight,
-    services::txpool::Result as TxPoolResult,
+    services::txpool::{
+        Error as TxPoolError,
+        Result as TxPoolResult,
+    },
 };
 
 pub type Result<T, E = Error> = std::result::Result<T, E>;
@@ -53,7 +56,7 @@ impl<A> FuelGasPriceProvider<A>
 where
     A: GasPriceAlgorithm + Send + Sync,
 {
-    async fn next_gas_price(&self) -> u64 {
+    async fn next_gas_price(&self) -> Option<u64> {
         self.algorithm.next_gas_price().await
     }
 }
@@ -64,7 +67,9 @@ where
     A: GasPriceAlgorithm + Send + Sync,
 {
     async fn next_gas_price(&self) -> anyhow::Result<u64> {
-        Ok(self.next_gas_price().await)
+        self.next_gas_price()
+            .await
+            .ok_or(anyhow::anyhow!("No gas price available"))
     }
 }
 
@@ -74,7 +79,11 @@ where
     A: GasPriceAlgorithm + Send + Sync,
 {
     async fn next_gas_price(&self) -> TxPoolResult<u64> {
-        Ok(self.next_gas_price().await)
+        self.next_gas_price()
+            .await
+            .ok_or(TxPoolError::GasPriceNotFound(
+                "Gas price not set yet".to_string(),
+            ))
     }
 }
 
@@ -83,7 +92,7 @@ impl<A> GraphqlGasPriceEstimate for FuelGasPriceProvider<A>
 where
     A: GasPriceAlgorithm + Send + Sync,
 {
-    async fn worst_case_gas_price(&self, height: BlockHeight) -> u64 {
+    async fn worst_case_gas_price(&self, height: BlockHeight) -> Option<u64> {
         self.algorithm.worst_case_gas_price(height).await
     }
 }

crates/fuel-core/src/service/adapters/fuel_gas_price_provider/tests.rs

@@ -15,7 +15,7 @@ fn build_provider<A>(algorithm: A) -> FuelGasPriceProvider<A>
 where
     A: Send + Sync,
 {
-    let algorithm = SharedGasPriceAlgo::new(algorithm);
+    let algorithm = SharedGasPriceAlgo::new_with_algorithm(algorithm);
     FuelGasPriceProvider::new(algorithm)
 }
 

crates/fuel-core/src/service/adapters/fuel_gas_price_provider/tests/graph_ql_gas_price_estimate_tests.rs

@@ -11,7 +11,10 @@ async fn estimate_gas_price__happy_path() {
 
     // when
     let expected_price = algo.worst_case_gas_price(next_height);
-    let actual_price = gas_price_provider.worst_case_gas_price(next_height).await;
+    let actual_price = gas_price_provider
+        .worst_case_gas_price(next_height)
+        .await
+        .unwrap();
 
     // then
     assert_eq!(expected_price, actual_price);

crates/fuel-core/src/service/adapters/fuel_gas_price_provider/tests/producer_gas_price_tests.rs

@@ -13,7 +13,7 @@ async fn gas_price__if_requested_block_height_is_latest_return_gas_price() {
 
     // when
     let expected_price = algo.next_gas_price();
-    let actual_price = gas_price_provider.next_gas_price().await;
+    let actual_price = gas_price_provider.next_gas_price().await.unwrap();
 
     // then
     assert_eq!(expected_price, actual_price);

crates/fuel-core/src/service/adapters/fuel_gas_price_provider/tests/tx_pool_gas_price_tests.rs

@@ -13,7 +13,7 @@ async fn gas_price__if_requested_block_height_is_latest_return_gas_price() {
 
     // when
     let expected_price = algo.next_gas_price();
-    let actual_price = gas_price_provider.next_gas_price().await;
+    let actual_price = gas_price_provider.next_gas_price().await.unwrap();
 
     // then
     assert_eq!(expected_price, actual_price);

crates/fuel-core/src/service/adapters/graphql_api.rs

@@ -165,8 +165,8 @@ impl worker::TxPool for TxPoolAdapter {
 
 #[async_trait::async_trait]
 impl GasPriceEstimate for StaticGasPrice {
-    async fn worst_case_gas_price(&self, _height: BlockHeight) -> u64 {
-        self.gas_price
+    async fn worst_case_gas_price(&self, _height: BlockHeight) -> Option<u64> {
+        Some(self.gas_price)
     }
 }
 

crates/fuel-core/src/service/sub_services.rs

@@ -1,4 +1,5 @@
 #![allow(clippy::let_unit_value)]
+
 use super::{
     adapters::P2PAdapter,
     genesis::create_genesis_block,
@@ -32,23 +33,31 @@ use crate::{
         SubServices,
     },
 };
+#[allow(unused_imports)]
 use fuel_core_gas_price_service::fuel_gas_price_updater::{
     fuel_core_storage_adapter::FuelL2BlockSource,
     Algorithm,
+    AlgorithmV0,
     FuelGasPriceUpdater,
     UpdaterMetadata,
     V0Metadata,
 };
 use fuel_core_poa::Trigger;
+use fuel_core_services::{
+    RunnableService,
+    ServiceRunner,
+};
 use fuel_core_storage::{
-    structured_storage::StructuredStorage,
+    self,
     transactional::AtomicView,
 };
 #[cfg(feature = "relayer")]
 use fuel_core_types::blockchain::primitives::DaBlockHeight;
 use std::sync::Arc;
 use tokio::sync::Mutex;
 
+mod algorithm_updater;
+
 pub type PoAService =
     fuel_core_poa::Service<TxPoolAdapter, BlockProducerAdapter, BlockImporterAdapter>;
 #[cfg(feature = "p2p")]
@@ -176,24 +185,20 @@ pub fn init_sub_services(
     #[cfg(not(feature = "p2p"))]
     let p2p_adapter = P2PAdapter::new();
 
-    let updater_metadata = UpdaterMetadata::V0(V0Metadata {
-        new_exec_price: config.starting_gas_price,
-        min_exec_gas_price: config.min_gas_price,
-        exec_gas_price_change_percent: config.gas_price_change_percent,
-        l2_block_height: last_height.into(),
-        l2_block_fullness_threshold_percent: config.gas_price_threshold_percent,
-    });
     let genesis_block_height = *genesis_block.header().height();
     let settings = consensus_parameters_provider.clone();
     let block_stream = importer_adapter.events_shared_result();
-    let l2_block_source =
-        FuelL2BlockSource::new(genesis_block_height, settings, block_stream);
-    let metadata_storage = StructuredStorage::new(database.gas_price().clone());
-    let update_algo =
-        FuelGasPriceUpdater::init(updater_metadata, l2_block_source, metadata_storage)?;
-    let gas_price_service =
-        fuel_core_gas_price_service::new_service(last_height, update_algo)?;
-    let next_algo = gas_price_service.shared.clone();
+
+    let gas_price_init = algorithm_updater::InitializeTask::new(
+        config.clone(),
+        genesis_block_height,
+        settings,
+        block_stream,
+        database.gas_price().clone(),
+        database.on_chain().clone(),
+    )?;
+    let next_algo = gas_price_init.shared_data();
+    let gas_price_service = ServiceRunner::new(gas_price_init);
 
     let gas_price_provider = FuelGasPriceProvider::new(next_algo);
     let txpool = fuel_core_txpool::new_service(