From d77773e90fcec35e122d1730dfd602331751f49f Mon Sep 17 00:00:00 2001
From: Kevin Heifner <heifnerk@objectcomputing.com>
Date: Tue, 12 Nov 2024 11:00:01 -0600
Subject: [PATCH] GH-985 Reset transaction_context on oc interrupt

---
 .../eosio/chain/transaction_context.hpp       |  5 +++--
 libraries/chain/transaction_context.cpp       | 20 ++++++++++++++-----
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/libraries/chain/include/eosio/chain/transaction_context.hpp b/libraries/chain/include/eosio/chain/transaction_context.hpp
index 37e9b6de30..a661feec15 100644
--- a/libraries/chain/include/eosio/chain/transaction_context.hpp
+++ b/libraries/chain/include/eosio/chain/transaction_context.hpp
@@ -38,7 +38,7 @@ namespace eosio::chain {
       std::optional<digests_t> digests_l; // legacy
       std::optional<digests_t> digests_s; // savanna
 
-      action_digests_t(store_which_t sw) {
+      explicit action_digests_t(store_which_t sw) {
          if (sw == store_which_t::legacy || sw == store_which_t::both)
             digests_l = digests_t{};
          if (sw == store_which_t::savanna || sw == store_which_t::both)
@@ -101,6 +101,7 @@ namespace eosio::chain {
    class transaction_context {
       private:
          void initialize();
+         void reset();
          void init( uint64_t initial_net_usage);
 
       public:
@@ -114,7 +115,7 @@ namespace eosio::chain {
                               transaction_metadata::trx_type type = transaction_metadata::trx_type::input);
          ~transaction_context();
 
-         void init_for_implicit_trx( uint64_t initial_net_usage = 0 );
+         void init_for_implicit_trx();
 
          void init_for_input_trx( uint64_t packed_trx_unprunable_size,
                                   uint64_t packed_trx_prunable_size );
diff --git a/libraries/chain/transaction_context.cpp b/libraries/chain/transaction_context.cpp
index b78c12bdba..56422864ae 100644
--- a/libraries/chain/transaction_context.cpp
+++ b/libraries/chain/transaction_context.cpp
@@ -56,12 +56,23 @@ namespace eosio::chain {
       initialize();
    }
 
+   void transaction_context::reset() {
+      undo();
+      *trace = transaction_trace{}; // reset trace
+      initialize();
+      resume_billing_timer(start);
+
+      auto sw = executed_action_receipts.store_which();
+      executed_action_receipts = action_digests_t{sw};
+      bill_to_accounts.clear();
+      validate_ram_usage.clear();
+   }
+
    void transaction_context::initialize() {
       if (!control.skip_db_sessions() && !is_read_only()) {
          undo_session.emplace(control.mutable_db().start_undo_session(true));
       }
 
-      *trace = transaction_trace{};
       trace->id = id;
       trace->block_num = control.head().block_num() + 1;
       trace->block_time = control.pending_block_time();
@@ -245,7 +256,7 @@ namespace eosio::chain {
       is_initialized = true;
    }
 
-   void transaction_context::init_for_implicit_trx( uint64_t initial_net_usage  )
+   void transaction_context::init_for_implicit_trx()
    {
       const transaction& trx = packed_trx.get_transaction();
       if( trx.transaction_extensions.size() > 0 ) {
@@ -253,7 +264,7 @@ namespace eosio::chain {
       }
 
       published = control.pending_block_time();
-      init( initial_net_usage);
+      init(0);
    }
 
    void transaction_context::init_for_input_trx( uint64_t packed_trx_unprunable_size,
@@ -355,8 +366,7 @@ namespace eosio::chain {
             break;
          } catch ( const fc::exception& e ) {
             if (e.code() == interrupt_oc_exception::code_value) {
-               initialize(); // resets undo session
-               resume_billing_timer(start);
+               reset();
                continue;
             }
             throw;