test: rename strk_pool_update_rewards_v0 (#37)

Author: noa-starkware

workspace/apps/staking/contracts/src/flow_test/flows.cairo

@@ -38,7 +38,7 @@ use staking::test_utils::{
     calculate_staker_strk_rewards_v2, calculate_strk_pool_rewards_v2,
     calculate_strk_pool_rewards_with_pool_balance_v2, compute_rewards_per_unit,
     declare_pool_contract, declare_pool_eic_contract, declare_staking_contract,
-    load_from_simple_map, load_one_felt, strk_pool_update_rewards_v1, to_amount_18_decimals,
+    load_from_simple_map, load_one_felt, strk_pool_update_rewards_v0, to_amount_18_decimals,
     upgrade_implementation,
 };
 use staking::types::{Amount, Commission};
@@ -1278,7 +1278,7 @@ pub(crate) impl PoolMemberInfoAfterUpgradeFlowImpl of FlowTrait<PoolMemberInfoAf
             .internal_pool_member_info(:delegator, :pool);
         let get_internal_pool_member_info_after_upgrade = system
             .get_internal_pool_member_info(:delegator, :pool);
-        let expected_pool_member_info = strk_pool_update_rewards_v1(
+        let expected_pool_member_info = strk_pool_update_rewards_v0(
             pool_member_info: self.delegator_info.unwrap(),
             updated_index: system.staking.get_global_index(),
         );

workspace/apps/staking/contracts/src/test_utils.cairo

@@ -910,10 +910,10 @@ pub(crate) fn advance_k_epochs_global() {
     }
 }
 
-// ---- Calculate Rewards - V1 -----
+// ---- Calculate Rewards - V0 (index based) -----
 
 /// Update rewards for STRK pool.
-pub(crate) fn strk_pool_update_rewards_v1(
+pub(crate) fn strk_pool_update_rewards_v0(
     pool_member_info: PoolMemberInfo, updated_index: Index,
 ) -> PoolMemberInfo {
     let interest: Index = updated_index - pool_member_info.index;