[StateAccumulatorV2] Re-enable on testnet as per epoch component

crates/sui-core/src/authority/epoch_start_configuration.rs

@@ -62,7 +62,7 @@ impl EpochFlag {
 
     /// For situations in which there is no config available (e.g. setting up a downloaded snapshot).
     pub fn default_for_no_config() -> Vec<Self> {
-        Self::default_flags_impl(&Default::default(), false)
+        Self::default_flags_impl(&Default::default(), true)
     }
 
     fn default_flags_impl(

crates/sui-core/src/state_accumulator.rs

@@ -5,7 +5,7 @@ use itertools::Itertools;
 use mysten_metrics::monitored_scope;
 use prometheus::{register_int_gauge_with_registry, IntGauge, Registry};
 use serde::Serialize;
-use sui_protocol_config::ProtocolConfig;
+use sui_protocol_config::{Chain, ProtocolConfig};
 use sui_types::base_types::{ObjectID, ObjectRef, SequenceNumber, VersionNumber};
 use sui_types::committee::EpochId;
 use sui_types::digests::{ObjectDigest, TransactionDigest};
@@ -389,15 +389,13 @@ impl StateAccumulator {
         epoch_store: &Arc<AuthorityPerEpochStore>,
         metrics: Arc<StateAccumulatorMetrics>,
     ) -> Self {
-        if cfg!(msim) {
-            if epoch_store.state_accumulator_v2_enabled() {
-                return StateAccumulator::V2(StateAccumulatorV2::new(store, metrics));
-            } else {
-                return StateAccumulator::V1(StateAccumulatorV1::new(store, metrics));
-            }
+        if epoch_store.state_accumulator_v2_enabled()
+            && epoch_store.get_chain_identifier().chain() != Chain::Mainnet
+        {
+            StateAccumulator::V2(StateAccumulatorV2::new(store, metrics))
+        } else {
+            StateAccumulator::V1(StateAccumulatorV1::new(store, metrics))
         }
-
-        StateAccumulator::V1(StateAccumulatorV1::new(store, metrics))
     }
 
     pub fn new_for_tests(