propose chain_index::Queryable as the name of the capability

integration-tests/tests/chain_cache.rs

@@ -54,10 +54,10 @@ mod chain_query_interface {
         chain_index::{
             source::ValidatorConnector,
             types::{BestChainLocation, TransactionHash},
-            NodeBackedChainIndex, NodeBackedChainIndexSubscriber,
+            Index, Subscriber,
         },
         test_dependencies::{
-            chain_index::{self, ChainIndex},
+            chain_index::{self, Queryable},
             BlockCacheConfig,
         },
         Height, StateService, StateServiceConfig, ZcashService,
@@ -79,8 +79,8 @@ mod chain_query_interface {
         TestManager<FetchService>,
         JsonRpSeeConnector,
         Option<StateService>,
-        NodeBackedChainIndex,
-        NodeBackedChainIndexSubscriber,
+        Index,
+        Subscriber,
     ) {
         let (test_manager, json_service) = create_test_manager_and_connector(
             validator,
@@ -150,7 +150,7 @@ mod chain_query_interface {
                         test_manager.local_net.get_activation_heights().into(),
                     ),
                 };
-                let chain_index = NodeBackedChainIndex::new(
+                let chain_index = Index::new(
                     ValidatorConnector::State(chain_index::source::State {
                         read_state_service: state_service.read_state_service().clone(),
                         mempool_fetcher: json_service.clone(),
@@ -187,12 +187,10 @@ mod chain_query_interface {
                         test_manager.local_net.get_activation_heights().into(),
                     ),
                 };
-                let chain_index = NodeBackedChainIndex::new(
-                    ValidatorConnector::Fetch(json_service.clone()),
-                    config,
-                )
-                .await
-                .unwrap();
+                let chain_index =
+                    Index::new(ValidatorConnector::Fetch(json_service.clone()), config)
+                        .await
+                        .unwrap();
                 let index_reader = chain_index.subscriber().await;
                 tokio::time::sleep(Duration::from_secs(3)).await;