Filter transaction

core/state/statedb.go

@@ -51,6 +51,7 @@ type revision struct {
 
 	// Arbitrum: track the total balance change across all accounts
 	unexpectedBalanceDelta *big.Int
+	arbTxFilter            bool
 }
 
 type mutationType int
@@ -219,6 +220,14 @@ func New(root common.Hash, db Database, snaps *snapshot.Tree) (*StateDB, error)
 	return sdb, nil
 }
 
+func (s *StateDB) FilterTx() {
+	s.arbExtraData.arbTxFilter = true
+}
+
+func (s *StateDB) IsTxFiltered() bool {
+	return s.arbExtraData.arbTxFilter
+}
+
 // SetLogger sets the logger for account update hooks.
 func (s *StateDB) SetLogger(l *tracing.Hooks) {
 	s.logger = l
@@ -736,6 +745,7 @@ func (s *StateDB) Copy() *StateDB {
 			recentWasms:            s.arbExtraData.recentWasms.Copy(),
 			openWasmPages:          s.arbExtraData.openWasmPages,
 			everWasmPages:          s.arbExtraData.everWasmPages,
+			arbTxFilter:            s.arbExtraData.arbTxFilter,
 		},
 
 		db:                   s.db,
@@ -819,7 +829,7 @@ func (s *StateDB) Copy() *StateDB {
 func (s *StateDB) Snapshot() int {
 	id := s.nextRevisionId
 	s.nextRevisionId++
-	s.validRevisions = append(s.validRevisions, revision{id, s.journal.length(), new(big.Int).Set(s.arbExtraData.unexpectedBalanceDelta)})
+	s.validRevisions = append(s.validRevisions, revision{id, s.journal.length(), new(big.Int).Set(s.arbExtraData.unexpectedBalanceDelta), s.arbExtraData.arbTxFilter})
 	return id
 }
 
@@ -835,6 +845,7 @@ func (s *StateDB) RevertToSnapshot(revid int) {
 	revision := s.validRevisions[idx]
 	snapshot := revision.journalIndex
 	s.arbExtraData.unexpectedBalanceDelta = new(big.Int).Set(revision.unexpectedBalanceDelta)
+	s.arbExtraData.arbTxFilter = revision.arbTxFilter
 
 	// Replay the journal to undo changes and remove invalidated snapshots
 	s.journal.revert(s, snapshot)
@@ -1220,6 +1231,9 @@ func (s *StateDB) GetTrie() Trie {
 // The associated block number of the state transition is also provided
 // for more chain context.
 func (s *StateDB) Commit(block uint64, deleteEmptyObjects bool) (common.Hash, error) {
+	if s.arbExtraData.arbTxFilter {
+		return common.Hash{}, ErrArbTxFilter
+	}
 	// Short circuit in case any database failure occurred earlier.
 	if s.dbErr != nil {
 		return common.Hash{}, fmt.Errorf("commit aborted due to earlier error: %v", s.dbErr)

core/state/statedb_arbitrum.go

@@ -164,13 +164,16 @@ func (s *StateDB) Deterministic() bool {
 	return s.deterministic
 }
 
+var ErrArbTxFilter error = errors.New("internal error")
+
 type ArbitrumExtraData struct {
 	unexpectedBalanceDelta *big.Int                      // total balance change across all accounts
 	userWasms              UserWasms                     // user wasms encountered during execution
 	openWasmPages          uint16                        // number of pages currently open
 	everWasmPages          uint16                        // largest number of pages ever allocated during this tx's execution
 	activatedWasms         map[common.Hash]ActivatedWasm // newly activated WASMs
 	recentWasms            RecentWasms
+	arbTxFilter            bool
 }
 
 func (s *StateDB) SetArbFinalizer(f func(*ArbitrumExtraData)) {

core/vm/interface.go

@@ -48,6 +48,10 @@ type StateDB interface {
 	// Arbitrum: preserve old empty account behavior
 	CreateZombieIfDeleted(common.Address)
 
+	// Arbitrum
+	FilterTx()
+	IsTxFiltered() bool
+
 	Deterministic() bool
 	Database() state.Database