apollo_l1_gas_price,apollo_l1_gas_price_config: move exchange_rate_decimals const to config

crates/apollo_integration_tests/Cargo.toml

@@ -35,7 +35,6 @@ apollo_infra = { workspace = true, features = ["testing"] }
 apollo_infra_utils = { workspace = true, features = ["testing"] }
 apollo_l1_events.workspace = true
 apollo_l1_events_config.workspace = true
-apollo_l1_gas_price.workspace = true
 apollo_l1_gas_price_config.workspace = true
 apollo_l1_gas_price_types.workspace = true
 apollo_mempool_config.workspace = true

crates/apollo_integration_tests/src/utils.rs

@@ -52,7 +52,6 @@ use apollo_http_server::test_utils::create_http_server_config;
 use apollo_infra::trace_util::configure_tracing;
 use apollo_infra_utils::test_utils::{AvailablePorts, TestIdentifier};
 use apollo_l1_events_config::config::{L1EventsProviderConfig, L1EventsScraperConfig};
-use apollo_l1_gas_price::exchange_rate_oracle::EXCHANGE_RATE_DECIMALS;
 use apollo_l1_gas_price_config::config::{
     ExchangeRateOracleConfig,
     L1GasPriceProviderConfig,
@@ -574,8 +573,7 @@ async fn get_rate(Query(query): Query<EthToStrkOracleQuery>) -> Json<serde_json:
     // TODO(Asmaa): Retrun timestamp as price once we start mocking out time in the
     // tests.
     let price = format!("0x{DEFAULT_ETH_TO_FRI_RATE:x}");
-    let response =
-        json!({ "timestamp": query.timestamp ,"price": price, "decimals": EXCHANGE_RATE_DECIMALS });
+    let response = json!({ "timestamp": query.timestamp ,"price": price, "decimals": 18 });
     Json(response)
 }
 

crates/apollo_l1_gas_price/src/exchange_rate_oracle.rs

@@ -30,8 +30,6 @@ use crate::metrics::{
 #[path = "exchange_rate_oracle_test.rs"]
 pub mod exchange_rate_oracle_test;
 
-pub const EXCHANGE_RATE_DECIMALS: u64 = 18;
-
 fn btreemap_to_headermap(hash_map: BTreeMap<String, String>) -> HeaderMap {
     let mut header_map = HeaderMap::new();
     for (key, value) in hash_map {
@@ -108,6 +106,7 @@ impl ExchangeRateOracleClient {
         );
         let adjusted_timestamp = quantized_timestamp * self.config.lag_interval_seconds;
         let query_timeout_sec = self.config.query_timeout_sec;
+        let expected_decimals = self.config.exchange_rate_decimals;
         let client = self.client.clone();
         let index_clone = self.index.clone();
         let url_header_list = self.url_header_list.clone();
@@ -126,7 +125,7 @@ impl ExchangeRateOracleClient {
                         .send()
                         .await?;
                     let body = response.text().await?;
-                    let rate = resolve_query(body)?;
+                    let rate = resolve_query(body, expected_decimals)?;
                     Ok::<_, ExchangeRateOracleClientError>(rate)
                 })
                 .await;
@@ -157,7 +156,10 @@ impl ExchangeRateOracleClient {
     }
 }
 
-fn resolve_query(body: String) -> Result<u128, ExchangeRateOracleClientError> {
+fn resolve_query(
+    body: String,
+    expected_decimals: u64,
+) -> Result<u128, ExchangeRateOracleClientError> {
     let Ok(json): Result<serde_json::Value, _> = serde_json::from_str(&body) else {
         return Err(ExchangeRateOracleClientError::ParseError(format!(
             "Failed to parse JSON: {body}"
@@ -186,9 +188,9 @@ fn resolve_query(body: String) -> Result<u128, ExchangeRateOracleClientError> {
             ));
         }
     };
-    if decimals != EXCHANGE_RATE_DECIMALS {
+    if decimals != expected_decimals {
         return Err(ExchangeRateOracleClientError::InvalidDecimalsError(
-            EXCHANGE_RATE_DECIMALS,
+            expected_decimals,
             decimals,
         ));
     }
@@ -202,7 +204,7 @@ fn resolve_query(body: String) -> Result<u128, ExchangeRateOracleClientError> {
 impl ExchangeRateOracleClientTrait for ExchangeRateOracleClient {
     /// The HTTP response must include the following fields:
     /// - `price`: a hexadecimal string representing the price.
-    /// - `decimals`: a `u64` value, must be equal to `EXCHANGE_RATE_DECIMALS`.
+    /// - `decimals`: a `u64` value, must be equal to `config.exchange_rate_decimals`.
     #[instrument(skip(self))]
     async fn fetch_rate(&self, timestamp: u64) -> Result<u128, ExchangeRateOracleClientError> {
         const NUMBER_OF_TIMESTAMPS_BACK: u64 = 1;

crates/apollo_l1_gas_price_config/src/config.rs

@@ -28,6 +28,7 @@ pub struct ExchangeRateOracleConfig {
     pub lag_interval_seconds: u64,
     pub max_cache_size: usize,
     pub query_timeout_sec: u64,
+    pub exchange_rate_decimals: u64,
 }
 
 impl SerializeConfig for ExchangeRateOracleConfig {
@@ -69,6 +70,13 @@ impl SerializeConfig for ExchangeRateOracleConfig {
                 "The timeout (seconds) for the query to the eth to strk oracle.",
                 ParamPrivacyInput::Public,
             ),
+            ser_param(
+                "exchange_rate_decimals",
+                &self.exchange_rate_decimals,
+                "The expected `decimals` value returned in oracle API responses. Responses with a \
+                 different `decimals` value are rejected as invalid. ETH/STRK feeds use 18.",
+                ParamPrivacyInput::Public,
+            ),
         ])
     }
 }
@@ -86,6 +94,7 @@ impl Default for ExchangeRateOracleConfig {
             lag_interval_seconds: 1,
             max_cache_size: 100,
             query_timeout_sec: 10,
+            exchange_rate_decimals: 18,
         }
     }
 }

crates/apollo_node/resources/config_schema.json

@@ -3274,6 +3274,11 @@
     "privacy": "TemporaryValue",
     "value": false
   },
+  "l1_gas_price_provider_config.eth_to_strk_oracle_config.exchange_rate_decimals": {
+    "description": "The expected `decimals` value returned in oracle API responses. Responses with a different `decimals` value are rejected as invalid. ETH/STRK feeds use 18.",
+    "privacy": "Public",
+    "value": 18
+  },
   "l1_gas_price_provider_config.eth_to_strk_oracle_config.lag_interval_seconds": {
     "description": "The size of the interval (seconds) that the eth to strk rate is taken on. The lag refers to the fact that the interval `[T, T+k)` contains the conversion rate for queries in the interval `[T+k, T+2k)`. Should be configured in alignment with relevant query parameters in `url_header_list`, if required.",
     "privacy": "Public",