Refunding for existing authority accounts via global refund counter

test/state/state.cpp

@@ -483,6 +483,8 @@ std::variant<TransactionReceipt, std::error_code> transition(State& state, const
     assert(sender_acc.nonce < Account::NonceMax);  // checked in transaction validation
     ++sender_acc.nonce;                            // Bump sender nonce.
 
+    auto delegation_refund = 0;
+
     for (const auto& auth : tx.authorization_list)
     {
         // Check if authority exists
@@ -501,7 +503,7 @@ std::variant<TransactionReceipt, std::error_code> transition(State& state, const
 
             // Refund if authority account creation is not needed
             static constexpr int64_t EXISTING_AUTHORITY_REFUND = 25000 - 2500;
-            sender_ptr->balance += EXISTING_AUTHORITY_REFUND;
+            delegation_refund += EXISTING_AUTHORITY_REFUND;
         }
         else
         {
@@ -579,7 +581,7 @@ std::variant<TransactionReceipt, std::error_code> transition(State& state, const
 
     const auto max_refund_quotient = rev >= EVMC_LONDON ? 5 : 2;
     const auto refund_limit = gas_used / max_refund_quotient;
-    const auto refund = std::min(result.gas_refund, refund_limit);
+    const auto refund = std::min(delegation_refund + result.gas_refund, refund_limit);
     gas_used -= refund;
     assert(gas_used > 0);