Merge pull request #2962 from nspcc-dev/notary-attr-upd

*: move NVB and Conflicts attributes out of extensions

docs/node-configuration.md

@@ -356,7 +356,7 @@ protocol-related settings described in the table below.
 | MemPoolSize | `int` | `50000` | Size of the node's memory pool where transactions are stored before they are added to block. |
 | NativeActivations | `map[string][]uint32` | ContractManagement: [0]<br>StdLib: [0]<br>CryptoLib: [0]<br>LedgerContract: [0]<br>NeoToken: [0]<br>GasToken: [0]<br>PolicyContract: [0]<br>RoleManagement: [0]<br>OracleContract: [0] | The list of histories of native contracts updates. Each list item shod be presented as a known native contract name with the corresponding list of chain's heights. The contract is not active until chain reaches the first height value specified in the list. | `Notary` is supported. |
 | P2PNotaryRequestPayloadPoolSize | `int` | `1000` | Size of the node's P2P Notary request payloads memory pool where P2P Notary requests are stored before main or fallback transaction is completed and added to the chain.<br>This option is valid only if `P2PSigExtensions` are enabled. | Not supported by the C# node, thus may affect heterogeneous networks functionality. |
-| P2PSigExtensions | `bool` | `false` | Enables following additional Notary service related logic:<br>• Transaction attributes `NotValidBefore`, `Conflicts` and `NotaryAssisted`<br>• Network payload of the `P2PNotaryRequest` type<br>• Native `Notary` contract<br>• Notary node module | Not supported by the C# node, thus may affect heterogeneous networks functionality. |
+| P2PSigExtensions | `bool` | `false` | Enables following additional Notary service related logic:<br>• Transaction attribute `NotaryAssisted`<br>• Network payload of the `P2PNotaryRequest` type<br>• Native `Notary` contract<br>• Notary node module | Not supported by the C# node, thus may affect heterogeneous networks functionality. |
 | P2PStateExchangeExtensions | `bool` | `false` | Enables the following P2P MPT state data exchange logic: <br>• `StateSyncInterval` protocol setting <br>• P2P commands `GetMPTDataCMD` and `MPTDataCMD` | Not supported by the C# node, thus may affect heterogeneous networks functionality. Can be supported either on MPT-complete node (`KeepOnlyLatestState`=`false`) or on light GC-enabled node (`RemoveUntraceableBlocks=true`) in which case `KeepOnlyLatestState` setting doesn't change the behavior, an appropriate set of MPTs is always stored (see `RemoveUntraceableBlocks`). |
 | RemoveUntraceableBlocks | `bool`| `false` | Denotes whether old blocks should be removed from cache and database. If enabled, then only the last `MaxTraceableBlocks` are stored and accessible to smart contracts. Old MPT data is also deleted in accordance with `GarbageCollectionPeriod` setting. If enabled along with `P2PStateExchangeExtensions`, then old blocks and MPT states will be removed up to the second latest state synchronisation point (see `StateSyncInterval`). | This setting is deprecated in favor of the same setting in the ApplicationConfiguration and will be removed in future node versions. If both settings are used, setting any of them to true enables the function. |
 | ReservedAttributes | `bool` | `false` | Allows to have reserved attributes range for experimental or private purposes. |

pkg/compiler/interop_test.go

@@ -320,7 +320,7 @@ func TestAppCall(t *testing.T) {
 	}
 
 	fc := fakechain.NewFakeChain()
-	ic := interop.NewContext(trigger.Application, fc, dao.NewSimple(storage.NewMemoryStore(), false, false),
+	ic := interop.NewContext(trigger.Application, fc, dao.NewSimple(storage.NewMemoryStore(), false),
 		interop.DefaultBaseExecFee, native.DefaultStoragePrice, contractGetter, nil, nil, nil, nil, zaptest.NewLogger(t))
 
 	t.Run("valid script", func(t *testing.T) {

pkg/core/blockchain.go

@@ -320,8 +320,8 @@ func NewBlockchain(s storage.Store, cfg config.Blockchain, log *zap.Logger) (*Bl
 	}
 	bc := &Blockchain{
 		config:      cfg,
-		dao:         dao.NewSimple(s, cfg.StateRootInHeader, cfg.P2PSigExtensions),
+		dao:         dao.NewSimple(s, cfg.StateRootInHeader),
-		persistent:  dao.NewSimple(s, cfg.StateRootInHeader, cfg.P2PSigExtensions),
+		persistent:  dao.NewSimple(s, cfg.StateRootInHeader),
 		store:       s,
 		stopCh:      make(chan struct{}),
 		runToExitCh: make(chan struct{}),
@@ -2573,9 +2573,6 @@ func (bc *Blockchain) verifyTxAttributes(d *dao.Simple, tx *transaction.Transact
 				return fmt.Errorf("%w: oracle tx has insufficient gas", ErrInvalidAttribute)
 			}
 		case transaction.NotValidBeforeT:
-			if !bc.config.P2PSigExtensions {
-				return fmt.Errorf("%w: NotValidBefore attribute was found, but P2PSigExtensions are disabled", ErrInvalidAttribute)
-			}
 			nvb := tx.Attributes[i].Value.(*transaction.NotValidBefore).Height
 			curHeight := bc.BlockHeight()
 			if isPartialTx {
@@ -2595,9 +2592,6 @@ func (bc *Blockchain) verifyTxAttributes(d *dao.Simple, tx *transaction.Transact
 				}
 			}
 		case transaction.ConflictsT:
-			if !bc.config.P2PSigExtensions {
-				return fmt.Errorf("%w: Conflicts attribute was found, but P2PSigExtensions are disabled", ErrInvalidAttribute)
-			}
 			conflicts := tx.Attributes[i].Value.(*transaction.Conflicts)
 			// Only fully-qualified dao.ErrAlreadyExists error bothers us here, thus, we
 			// can safely omit the payer argument to HasTransaction call to improve performance a bit.
@@ -2758,7 +2752,7 @@ func (bc *Blockchain) GetTestHistoricVM(t trigger.Type, tx *transaction.Transact
 		return nil, fmt.Errorf("failed to retrieve stateroot for height %d: %w", b.Index, err)
 	}
 	s := mpt.NewTrieStore(sr.Root, mode, storage.NewPrivateMemCachedStore(bc.dao.Store))
-	dTrie := dao.NewSimple(s, bc.config.StateRootInHeader, bc.config.P2PSigExtensions)
+	dTrie := dao.NewSimple(s, bc.config.StateRootInHeader)
 	dTrie.Version = bc.dao.Version
 	// Initialize native cache before passing DAO to interop context constructor, because
 	// the constructor will call BaseExecFee/StoragePrice policy methods on the passed DAO.

pkg/core/blockchain_neotest_test.go

@@ -94,7 +94,7 @@ func TestBlockchain_StartFromExistingDB(t *testing.T) {
 	t.Run("mismatch storage version", func(t *testing.T) {
 		ps = newPS(t)
 		cache := storage.NewMemCachedStore(ps) // Extra wrapper to avoid good DB corruption.
-		d := dao.NewSimple(cache, bc.GetConfig().StateRootInHeader, bc.GetConfig().P2PStateExchangeExtensions)
+		d := dao.NewSimple(cache, bc.GetConfig().StateRootInHeader)
 		d.PutVersion(dao.Version{
 			Value: "0.0.0",
 		})
@@ -1535,7 +1535,7 @@ func TestBlockchain_VerifyTx(t *testing.T) {
 				}}
 				return tx
 			}
-			t.Run("Disabled", func(t *testing.T) {
+			t.Run("Disabled", func(t *testing.T) { // check that NVB attribute is not an extension anymore.
 				bcBad, validatorBad, committeeBad := chain.NewMultiWithCustomConfig(t, func(c *config.Blockchain) {
 					c.P2PSigExtensions = false
 					c.ReservedAttributes = false
@@ -1543,8 +1543,7 @@ func TestBlockchain_VerifyTx(t *testing.T) {
 				eBad := neotest.NewExecutor(t, bcBad, validatorBad, committeeBad)
 				tx := getNVBTx(eBad, bcBad.BlockHeight())
 				err := bcBad.VerifyTx(tx)
-				require.Error(t, err)
+				require.NoError(t, err)
-				require.True(t, strings.Contains(err.Error(), "invalid attribute: NotValidBefore attribute was found, but P2PSigExtensions are disabled"))
 			})
 			t.Run("Enabled", func(t *testing.T) {
 				t.Run("NotYetValid", func(t *testing.T) {
@@ -1621,7 +1620,7 @@ func TestBlockchain_VerifyTx(t *testing.T) {
 				}}
 				return tx
 			}
-			t.Run("disabled", func(t *testing.T) {
+			t.Run("disabled", func(t *testing.T) { // check that Conflicts attribute is not an extension anymore.
 				bcBad, validatorBad, committeeBad := chain.NewMultiWithCustomConfig(t, func(c *config.Blockchain) {
 					c.P2PSigExtensions = false
 					c.ReservedAttributes = false
@@ -1629,8 +1628,7 @@ func TestBlockchain_VerifyTx(t *testing.T) {
 				eBad := neotest.NewExecutor(t, bcBad, validatorBad, committeeBad)
 				tx := getConflictsTx(eBad, util.Uint256{1, 2, 3})
 				err := bcBad.VerifyTx(tx)
-				require.Error(t, err)
+				require.NoError(t, err)
-				require.True(t, strings.Contains(err.Error(), "invalid attribute: Conflicts attribute was found, but P2PSigExtensions are disabled"))
 			})
 			t.Run("enabled", func(t *testing.T) {
 				t.Run("dummy on-chain conflict", func(t *testing.T) {

pkg/core/dao/dao.go

@@ -62,17 +62,16 @@ type NativeContractCache interface {
 }
 
 // NewSimple creates a new simple dao using the provided backend store.
-func NewSimple(backend storage.Store, stateRootInHeader bool, p2pSigExtensions bool) *Simple {
+func NewSimple(backend storage.Store, stateRootInHeader bool) *Simple {
 	st := storage.NewMemCachedStore(backend)
-	return newSimple(st, stateRootInHeader, p2pSigExtensions)
+	return newSimple(st, stateRootInHeader)
 }
 
-func newSimple(st *storage.MemCachedStore, stateRootInHeader bool, p2pSigExtensions bool) *Simple {
+func newSimple(st *storage.MemCachedStore, stateRootInHeader bool) *Simple {
 	return &Simple{
 		Version: Version{
 			StoragePrefix:     storage.STStorage,
 			StateRootInHeader: stateRootInHeader,
-			P2PSigExtensions:  p2pSigExtensions,
 		},
 		Store:       st,
 		nativeCache: make(map[int32]NativeContractCache),
@@ -87,7 +86,7 @@ func (dao *Simple) GetBatch() *storage.MemBatch {
 // GetWrapped returns a new DAO instance with another layer of wrapped
 // MemCachedStore around the current DAO Store.
 func (dao *Simple) GetWrapped() *Simple {
-	d := NewSimple(dao.Store, dao.Version.StateRootInHeader, dao.Version.P2PSigExtensions)
+	d := NewSimple(dao.Store, dao.Version.StateRootInHeader)
 	d.Version = dao.Version
 	d.nativeCachePS = dao
 	return d
@@ -766,14 +765,12 @@ func (dao *Simple) DeleteBlock(h util.Uint256) error {
 	for _, tx := range b.Transactions {
 		copy(key[1:], tx.Hash().BytesBE())
 		dao.Store.Delete(key)
-		if dao.Version.P2PSigExtensions {
 		for _, attr := range tx.GetAttributes(transaction.ConflictsT) {
 			hash := attr.Value.(*transaction.Conflicts).Hash
 			copy(key[1:], hash.BytesBE())
 			dao.Store.Delete(key)
 		}
 	}
-	}
 
 	return nil
 }
@@ -830,7 +827,7 @@ func (dao *Simple) StoreAsTransaction(tx *transaction.Transaction, index uint32,
 		return buf.Err
 	}
 	dao.Store.Put(key, buf.Bytes())
-	if dao.Version.P2PSigExtensions {
+
 	var (
 		valuePrefix []byte
 		newSigners  []byte
@@ -876,7 +873,6 @@ func (dao *Simple) StoreAsTransaction(tx *transaction.Transaction, index uint32,
 			newSigners = slice.Copy(val[newSignersOffset:])
 		}
 	}
-	}
 	return nil
 }
 

pkg/core/dao/dao_test.go

@@ -18,7 +18,7 @@ import (
 )
 
 func TestPutGetAndDecode(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	serializable := &TestSerializable{field: random.String(4)}
 	hash := []byte{1}
 	require.NoError(t, dao.putWithBuffer(serializable, hash, io.NewBufBinWriter()))
@@ -42,7 +42,7 @@ func (t *TestSerializable) DecodeBinary(reader *io.BinReader) {
 }
 
 func TestPutGetStorageItem(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	id := int32(random.Int(0, 1024))
 	key := []byte{0}
 	storageItem := state.StorageItem{}
@@ -52,7 +52,7 @@ func TestPutGetStorageItem(t *testing.T) {
 }
 
 func TestDeleteStorageItem(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	id := int32(random.Int(0, 1024))
 	key := []byte{0}
 	storageItem := state.StorageItem{}
@@ -63,7 +63,7 @@ func TestDeleteStorageItem(t *testing.T) {
 }
 
 func TestGetBlock_NotExists(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	hash := random.Uint256()
 	block, err := dao.GetBlock(hash)
 	require.Error(t, err)
@@ -71,7 +71,7 @@ func TestGetBlock_NotExists(t *testing.T) {
 }
 
 func TestPutGetBlock(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	b := &block.Block{
 		Header: block.Header{
 			Script: transaction.Witness{
@@ -110,14 +110,14 @@ func TestPutGetBlock(t *testing.T) {
 }
 
 func TestGetVersion_NoVersion(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	version, err := dao.GetVersion()
 	require.Error(t, err)
 	require.Equal(t, "", version.Value)
 }
 
 func TestGetVersion(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	expected := Version{
 		StoragePrefix:     0x42,
 		P2PSigExtensions:  true,
@@ -130,14 +130,14 @@ func TestGetVersion(t *testing.T) {
 	require.Equal(t, expected, actual)
 
 	t.Run("invalid", func(t *testing.T) {
-		dao := NewSimple(storage.NewMemoryStore(), false, false)
+		dao := NewSimple(storage.NewMemoryStore(), false)
 		dao.Store.Put([]byte{byte(storage.SYSVersion)}, []byte("0.1.2\x00x"))
 
 		_, err := dao.GetVersion()
 		require.Error(t, err)
 	})
 	t.Run("old format", func(t *testing.T) {
-		dao := NewSimple(storage.NewMemoryStore(), false, false)
+		dao := NewSimple(storage.NewMemoryStore(), false)
 		dao.Store.Put([]byte{byte(storage.SYSVersion)}, []byte("0.1.2"))
 
 		version, err := dao.GetVersion()
@@ -147,14 +147,14 @@ func TestGetVersion(t *testing.T) {
 }
 
 func TestGetCurrentHeaderHeight_NoHeader(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	height, err := dao.GetCurrentBlockHeight()
 	require.Error(t, err)
 	require.Equal(t, uint32(0), height)
 }
 
 func TestGetCurrentHeaderHeight_Store(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), false, false)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	b := &block.Block{
 		Header: block.Header{
 			Script: transaction.Witness{
@@ -170,8 +170,8 @@ func TestGetCurrentHeaderHeight_Store(t *testing.T) {
 }
 
 func TestStoreAsTransaction(t *testing.T) {
-	t.Run("P2PSigExtensions off", func(t *testing.T) {
+	t.Run("no conflicts", func(t *testing.T) {
-		dao := NewSimple(storage.NewMemoryStore(), false, false)
+		dao := NewSimple(storage.NewMemoryStore(), false)
 		tx := transaction.New([]byte{byte(opcode.PUSH1)}, 1)
 		tx.Signers = append(tx.Signers, transaction.Signer{})
 		tx.Scripts = append(tx.Scripts, transaction.Witness{})
@@ -194,8 +194,8 @@ func TestStoreAsTransaction(t *testing.T) {
 		require.Equal(t, *aer, gotAppExecResult[0])
 	})
 
-	t.Run("P2PSigExtensions on", func(t *testing.T) {
+	t.Run("with conflicts", func(t *testing.T) {
-		dao := NewSimple(storage.NewMemoryStore(), false, true)
+		dao := NewSimple(storage.NewMemoryStore(), false)
 		conflictsH := util.Uint256{1, 2, 3}
 		signer1 := util.Uint160{1, 2, 3}
 		signer2 := util.Uint160{4, 5, 6}
@@ -279,7 +279,7 @@ func TestStoreAsTransaction(t *testing.T) {
 }
 
 func BenchmarkStoreAsTransaction(b *testing.B) {
-	dao := NewSimple(storage.NewMemoryStore(), false, true)
+	dao := NewSimple(storage.NewMemoryStore(), false)
 	tx := transaction.New([]byte{byte(opcode.PUSH1)}, 1)
 	tx.Attributes = []transaction.Attribute{
 		{
@@ -324,7 +324,7 @@ func BenchmarkStoreAsTransaction(b *testing.B) {
 func TestMakeStorageItemKey(t *testing.T) {
 	var id int32 = 5
 
-	dao := NewSimple(storage.NewMemoryStore(), true, false)
+	dao := NewSimple(storage.NewMemoryStore(), true)
 
 	expected := []byte{byte(storage.STStorage), 0, 0, 0, 0, 1, 2, 3}
 	binary.LittleEndian.PutUint32(expected[1:5], uint32(id))
@@ -343,7 +343,7 @@ func TestMakeStorageItemKey(t *testing.T) {
 }
 
 func TestPutGetStateSyncPoint(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), true, false)
+	dao := NewSimple(storage.NewMemoryStore(), true)
 
 	// empty store
 	_, err := dao.GetStateSyncPoint()
@@ -358,7 +358,7 @@ func TestPutGetStateSyncPoint(t *testing.T) {
 }
 
 func TestPutGetStateSyncCurrentBlockHeight(t *testing.T) {
-	dao := NewSimple(storage.NewMemoryStore(), true, false)
+	dao := NewSimple(storage.NewMemoryStore(), true)
 
 	// empty store
 	_, err := dao.GetStateSyncCurrentBlockHeight()

pkg/core/interop/crypto/ecdsa_test.go

@@ -72,7 +72,7 @@ func initCheckMultisigVMNoArgs(container *transaction.Transaction) *vm.VM {
 	ic := interop.NewContext(
 		trigger.Verification,
 		fakechain.NewFakeChain(),
-		dao.NewSimple(storage.NewMemoryStore(), false, false),
+		dao.NewSimple(storage.NewMemoryStore(), false),
 		interop.DefaultBaseExecFee, native.DefaultStoragePrice, nil, nil, nil, nil,
 		container,
 		nil)
@@ -178,7 +178,7 @@ func TestCheckSig(t *testing.T) {
 	require.NoError(t, err)
 
 	verifyFunc := ECDSASecp256r1CheckSig
-	d := dao.NewSimple(storage.NewMemoryStore(), false, false)
+	d := dao.NewSimple(storage.NewMemoryStore(), false)
 	ic := &interop.Context{Network: uint32(netmode.UnitTestNet), DAO: d}
 	runCase := func(t *testing.T, isErr bool, result any, args ...any) {
 		ic.SpawnVM()

pkg/core/mempool/feer.go

@@ -11,5 +11,4 @@ type Feer interface {
 	FeePerByte() int64
 	GetUtilityTokenBalance(util.Uint160) *big.Int
 	BlockHeight() uint32
-	P2PSigExtensionsEnabled() bool
 }

pkg/core/mempool/mem_pool.go

@@ -145,7 +145,6 @@ func (mp *Pool) HasConflicts(t *transaction.Transaction, fee Feer) bool {
 	if mp.containsKey(t.Hash()) {
 		return true
 	}
-	if fee.P2PSigExtensionsEnabled() {
 	// do not check sender's signature and fee
 	if _, ok := mp.conflicts[t.Hash()]; ok {
 		return true
@@ -155,7 +154,6 @@ func (mp *Pool) HasConflicts(t *transaction.Transaction, fee Feer) bool {
 			return true
 		}
 	}
-	}
 	return false
 }
 
@@ -229,12 +227,10 @@ func (mp *Pool) Add(t *transaction.Transaction, fee Feer, data ...any) error {
 		mp.oracleResp[id] = t.Hash()
 	}
 
-	if fee.P2PSigExtensionsEnabled() {
 	// Remove conflicting transactions.
 	for _, conflictingTx := range conflictsToBeRemoved {
 		mp.removeInternal(conflictingTx.Hash(), fee)
 	}
-	}
 	// Insert into a sorted array (from max to min, that could also be done
 	// using sort.Sort(sort.Reverse()), but it incurs more overhead. Notice
 	// also that we're searching for a position that is strictly more
@@ -255,9 +251,7 @@ func (mp *Pool) Add(t *transaction.Transaction, fee Feer, data ...any) error {
 		// Ditch the last one.
 		unlucky := mp.verifiedTxes[len(mp.verifiedTxes)-1]
 		delete(mp.verifiedMap, unlucky.txn.Hash())
-		if fee.P2PSigExtensionsEnabled() {
 		mp.removeConflictsOf(unlucky.txn)
-		}
 		if attrs := unlucky.txn.GetAttributes(transaction.OracleResponseT); len(attrs) != 0 {
 			delete(mp.oracleResp, attrs[0].Value.(*transaction.OracleResponse).ID)
 		}
@@ -277,13 +271,11 @@ func (mp *Pool) Add(t *transaction.Transaction, fee Feer, data ...any) error {
 		mp.verifiedTxes[n] = pItem
 	}
 	mp.verifiedMap[t.Hash()] = t
-	if fee.P2PSigExtensionsEnabled() {
 	// Add conflicting hashes to the mp.conflicts list.
 	for _, attr := range t.GetAttributes(transaction.ConflictsT) {
 		hash := attr.Value.(*transaction.Conflicts).Hash
 		mp.conflicts[hash] = append(mp.conflicts[hash], t.Hash())
 	}
-	}
 	// we already checked balance in checkTxConflicts, so don't need to check again
 	mp.tryAddSendersFee(pItem.txn, fee, false)
 
@@ -330,10 +322,8 @@ func (mp *Pool) removeInternal(hash util.Uint256, feer Feer) {
 		senderFee := mp.fees[payer]
 		senderFee.feeSum.SubUint64(&senderFee.feeSum, uint64(tx.SystemFee+tx.NetworkFee))
 		mp.fees[payer] = senderFee
-		if feer.P2PSigExtensionsEnabled() {
 		// remove all conflicting hashes from mp.conflicts list
 		mp.removeConflictsOf(tx)
-		}
 		if attrs := tx.GetAttributes(transaction.OracleResponseT); len(attrs) != 0 {
 			delete(mp.oracleResp, attrs[0].Value.(*transaction.OracleResponse).ID)
 		}
@@ -360,9 +350,7 @@ func (mp *Pool) RemoveStale(isOK func(*transaction.Transaction) bool, feer Feer)
 	// because items are iterated one-by-one in increasing order.
 	newVerifiedTxes := mp.verifiedTxes[:0]
 	mp.fees = make(map[util.Uint160]utilityBalanceAndFees) // it'd be nice to reuse existing map, but we can't easily clear it
-	if feer.P2PSigExtensionsEnabled() {
 	mp.conflicts = make(map[util.Uint256][]util.Uint256)
-	}
 	height := feer.BlockHeight()
 	var (
 		staleItems []item
@@ -370,12 +358,10 @@ func (mp *Pool) RemoveStale(isOK func(*transaction.Transaction) bool, feer Feer)
 	for _, itm := range mp.verifiedTxes {
 		if isOK(itm.txn) && mp.checkPolicy(itm.txn, policyChanged) && mp.tryAddSendersFee(itm.txn, feer, true) {
 			newVerifiedTxes = append(newVerifiedTxes, itm)
-			if feer.P2PSigExtensionsEnabled() {
 			for _, attr := range itm.txn.GetAttributes(transaction.ConflictsT) {
 				hash := attr.Value.(*transaction.Conflicts).Hash
 				mp.conflicts[hash] = append(mp.conflicts[hash], itm.txn.Hash())
 			}
-			}
 			if mp.resendThreshold != 0 {
 				// item is resent at resendThreshold, 2*resendThreshold, 4*resendThreshold ...
 				// so quotient must be a power of two.
@@ -524,7 +510,6 @@ func (mp *Pool) checkTxConflicts(tx *transaction.Transaction, fee Feer) ([]*tran
 		conflictsToBeRemoved []*transaction.Transaction
 		conflictingFee       int64
 	)
-	if fee.P2PSigExtensionsEnabled() {
 	// Step 1: check if `tx` was in attributes of mempooled transactions.
 	if conflictingHashes, ok := mp.conflicts[tx.Hash()]; ok {
 		for _, hash := range conflictingHashes {
@@ -572,9 +557,6 @@ func (mp *Pool) checkTxConflicts(tx *transaction.Transaction, fee Feer) ([]*tran
 			expectedSenderFee.feeSum.SubUint64(&expectedSenderFee.feeSum, uint64(conflictingTx.SystemFee+conflictingTx.NetworkFee))
 		}
 	}
-	} else {
-		expectedSenderFee = actualSenderFee
-	}
 	_, err := checkBalance(tx, expectedSenderFee)
 	return conflictsToBeRemoved, err
 }

pkg/core/mempool/mem_pool_test.go

@@ -40,10 +40,6 @@ func (fs *FeerStub) GetUtilityTokenBalance(uint160 util.Uint160) *big.Int {
 	return big.NewInt(fs.balance)
 }
 
-func (fs *FeerStub) P2PSigExtensionsEnabled() bool {
-	return fs.p2pSigExt
-}
-
 func testMemPoolAddRemoveWithFeer(t *testing.T, fs Feer) {
 	mp := New(10, 0, false, nil)
 	tx := transaction.New([]byte{byte(opcode.PUSH1)}, 0)

pkg/core/native/management_test.go

@@ -18,7 +18,7 @@ import (
 func TestDeployGetUpdateDestroyContract(t *testing.T) {
 	mgmt := newManagement()
 	mgmt.Policy = newPolicy()
-	d := dao.NewSimple(storage.NewMemoryStore(), false, false)
+	d := dao.NewSimple(storage.NewMemoryStore(), false)
 	ic := &interop.Context{DAO: d}
 	err := mgmt.Initialize(ic)
 	require.NoError(t, err)
@@ -81,13 +81,13 @@ func TestDeployGetUpdateDestroyContract(t *testing.T) {
 
 func TestManagement_Initialize(t *testing.T) {
 	t.Run("good", func(t *testing.T) {
-		d := dao.NewSimple(storage.NewMemoryStore(), false, false)
+		d := dao.NewSimple(storage.NewMemoryStore(), false)
 		mgmt := newManagement()
 		require.NoError(t, mgmt.InitializeCache(0, d))
 	})
 	/* See #2801
 	t.Run("invalid contract state", func(t *testing.T) {
-		d := dao.NewSimple(storage.NewMemoryStore(), false, false)
+		d := dao.NewSimple(storage.NewMemoryStore(), false)
 		mgmt := newManagement()
 		d.PutStorageItem(mgmt.ID, []byte{PrefixContract}, state.StorageItem{0xFF})
 		require.Error(t, mgmt.InitializeCache(d))
@@ -98,7 +98,7 @@ func TestManagement_Initialize(t *testing.T) {
 func TestManagement_GetNEP17Contracts(t *testing.T) {
 	mgmt := newManagement()
 	mgmt.Policy = newPolicy()
-	d := dao.NewSimple(storage.NewMemoryStore(), false, false)
+	d := dao.NewSimple(storage.NewMemoryStore(), false)
 	err := mgmt.Initialize(&interop.Context{DAO: d})
 	require.NoError(t, err)
 	require.NoError(t, mgmt.Policy.Initialize(&interop.Context{DAO: d}))

pkg/core/statesync/module_test.go

@@ -54,7 +54,7 @@ func TestModule_PR2019_discussion_r689629704(t *testing.T) {
 		syncPoint:    1000500,
 		syncStage:    headersSynced,
 		syncInterval: 100500,
-		dao:          dao.NewSimple(actualStorage, true, false),
+		dao:          dao.NewSimple(actualStorage, true),
 		mptpool:      NewPool(),
 	}
 	stateSync.billet = mpt.NewBillet(sr, mpt.ModeLatest,

pkg/network/notary_feer.go

@@ -26,11 +26,6 @@ func (f NotaryFeer) BlockHeight() uint32 {
 	return f.bc.BlockHeight()
 }
 
-// P2PSigExtensionsEnabled implements mempool.Feer interface.
-func (f NotaryFeer) P2PSigExtensionsEnabled() bool {
-	return f.bc.P2PSigExtensionsEnabled()
-}
-
 // NewNotaryFeer returns new NotaryFeer instance.
 func NewNotaryFeer(bc Ledger) NotaryFeer {
 	return NotaryFeer{

pkg/network/server_test.go

@@ -1001,7 +1001,6 @@ type feerStub struct {
 func (f feerStub) FeePerByte() int64                            { return 1 }
 func (f feerStub) GetUtilityTokenBalance(util.Uint160) *big.Int { return big.NewInt(100000000) }
 func (f feerStub) BlockHeight() uint32                          { return f.blockHeight }
-func (f feerStub) P2PSigExtensionsEnabled() bool                { return false }
 func (f feerStub) GetBaseExecFee() int64                        { return interop.DefaultBaseExecFee }
 
 func TestMemPool(t *testing.T) {

pkg/services/rpcsrv/server.go

@@ -98,6 +98,7 @@ type (
 		GetTransaction(util.Uint256) (*transaction.Transaction, uint32, error)
 		HeaderHeight() uint32
 		InitVerificationContext(ic *interop.Context, hash util.Uint160, witness *transaction.Witness) error
+		P2PSigExtensionsEnabled() bool
 		SubscribeForBlocks(ch chan *block.Block)
 		SubscribeForExecutions(ch chan *state.AppExecResult)
 		SubscribeForNotifications(ch chan *state.ContainedNotificationEvent)

pkg/services/rpcsrv/server_helper_test.go

@@ -173,10 +173,6 @@ func (fs *FeerStub) GetUtilityTokenBalance(acc util.Uint160) *big.Int {
 	return big.NewInt(1000000 * native.GASFactor)
 }
 
-func (fs FeerStub) P2PSigExtensionsEnabled() bool {
-	return false
-}
-
 func (fs FeerStub) GetBaseExecFee() int64 {
 	return interop.DefaultBaseExecFee
 }