Merge pull request #2431 from nspcc-dev/rpc/historicall

rpc: support historic calls

docs/rpc.md

@@ -168,6 +168,28 @@ block. It can be removed in future versions, but at the moment you can use it
 to see how much GAS is burned with particular block (because system fees are
 burned).
 
+#### `invokecontractverifyhistoric`, `invokefunctionhistoric` and `invokescripthistoric` calls
+
+These methods provide the ability of *historical* calls and accept block hash or
+block index or stateroot hash as the first parameter and the list of parameters
+that is the same as of `invokecontractverify`, `invokefunction` and
+`invokescript` correspondingly. The historical call assumes that the contracts'
+storage state has all its values got from MPT with the specified stateroot and
+the transaction will be invoked using interop context with block of the specified
+height. This allows to perform test invocation using the specified past chain
+state. These methods may be useful for debugging purposes.
+
+Behavior note: any historical RPC call need the historical chain state to be
+presented in the node storage, thus if the node keeps only latest MPT state
+the historical call can not be handled properly.The historical calls only
+guaranteed to correctly work on archival node that stores all MPT data. If a
+node keeps the number of latest states and has the GC on (this setting
+corresponds to the `RemoveUntraceableBlocks` set to `true`), then the behaviour
+of historical RPC call is undefined. GC can always kick some data out of the
+storage while the historical call is executing, thus keep in mind that the call
+can be processed with `RemoveUntraceableBlocks` only with limitations on
+available data.
+
 #### `submitnotaryrequest` call
 
 This method can be used on P2P Notary enabled networks to submit new notary

pkg/compiler/interop_test.go

@@ -201,7 +201,8 @@ func TestAppCall(t *testing.T) {
 	}
 
 	fc := fakechain.NewFakeChain()
-	ic := interop.NewContext(trigger.Application, fc, dao.NewSimple(storage.NewMemoryStore(), false, false), interop.DefaultBaseExecFee, native.DefaultStoragePrice, contractGetter, nil, nil, nil, zaptest.NewLogger(t))
+	ic := interop.NewContext(trigger.Application, fc, dao.NewSimple(storage.NewMemoryStore(), false, false),
+		interop.DefaultBaseExecFee, native.DefaultStoragePrice, contractGetter, nil, nil, nil, zaptest.NewLogger(t))
 
 	t.Run("valid script", func(t *testing.T) {
 		src := getAppCallScript(fmt.Sprintf("%#v", ih.BytesBE()))

pkg/core/basic_chain_test.go

@@ -76,7 +76,7 @@ func TestCreateBasicChain(t *testing.T) {
 
 func initBasicChain(t *testing.T, e *neotest.Executor) {
 	if !e.Chain.GetConfig().P2PSigExtensions {
-		t.Fatal("P2PSitExtensions should be enabled to init basic chain")
+		t.Fatal("P2PSigExtensions should be enabled to init basic chain")
 	}
 
 	const neoAmount = 99999000

pkg/core/blockchain.go

@@ -433,14 +433,9 @@ func (bc *Blockchain) init() error {
 		return fmt.Errorf("can't init MPT at height %d: %w", bHeight, err)
 	}
 
-	err = bc.contracts.NEO.InitializeCache(bc, bc.dao)
+	err = bc.initializeNativeCache(bc.blockHeight, bc.dao)
 	if err != nil {
-		return fmt.Errorf("can't init cache for NEO native contract: %w", err)
+		return fmt.Errorf("can't init natives cache: %w", err)
-	}
-
-	err = bc.contracts.Management.InitializeCache(bc.dao)
-	if err != nil {
-		return fmt.Errorf("can't init cache for Management native contract: %w", err)
 	}
 
 	// Check autogenerated native contracts' manifests and NEFs against the stored ones.
@@ -575,15 +570,10 @@ func (bc *Blockchain) jumpToStateInternal(p uint32, stage stateJumpStage) error
 		Root:  block.PrevStateRoot,
 	})
 
-	err = bc.contracts.NEO.InitializeCache(bc, bc.dao)
+	err = bc.initializeNativeCache(block.Index, bc.dao)
 	if err != nil {
-		return fmt.Errorf("can't init cache for NEO native contract: %w", err)
+		return fmt.Errorf("failed to initialize natives cache: %w", err)
 	}
-	err = bc.contracts.Management.InitializeCache(bc.dao)
-	if err != nil {
-		return fmt.Errorf("can't init cache for Management native contract: %w", err)
-	}
-	bc.contracts.Designate.InitializeCache()
 
 	if err := bc.updateExtensibleWhitelist(p); err != nil {
 		return fmt.Errorf("failed to update extensible whitelist: %w", err)
@@ -595,6 +585,33 @@ func (bc *Blockchain) jumpToStateInternal(p uint32, stage stateJumpStage) error
 	return nil
 }
 
+func (bc *Blockchain) initializeNativeCache(blockHeight uint32, d *dao.Simple) error {
+	err := bc.contracts.NEO.InitializeCache(blockHeight, d)
+	if err != nil {
+		return fmt.Errorf("can't init cache for NEO native contract: %w", err)
+	}
+	err = bc.contracts.Management.InitializeCache(d)
+	if err != nil {
+		return fmt.Errorf("can't init cache for Management native contract: %w", err)
+	}
+	err = bc.contracts.Designate.InitializeCache(d)
+	if err != nil {
+		return fmt.Errorf("can't init cache for Designation native contract: %w", err)
+	}
+	bc.contracts.Oracle.InitializeCache(d)
+	if bc.P2PSigExtensionsEnabled() {
+		err = bc.contracts.Notary.InitializeCache(d)
+		if err != nil {
+			return fmt.Errorf("can't init cache for Notary native contract: %w", err)
+		}
+	}
+	err = bc.contracts.Policy.InitializeCache(d)
+	if err != nil {
+		return fmt.Errorf("can't init cache for Policy native contract: %w", err)
+	}
+	return nil
+}
+
 // Run runs chain loop, it needs to be run as goroutine and executing it is
 // critical for correct Blockchain operation.
 func (bc *Blockchain) Run() {
@@ -1220,14 +1237,14 @@ func (bc *Blockchain) updateExtensibleWhitelist(height uint32) error {
 		return nil
 	}
 
-	newList := []util.Uint160{bc.contracts.NEO.GetCommitteeAddress()}
+	newList := []util.Uint160{bc.contracts.NEO.GetCommitteeAddress(bc.dao)}
-	nextVals := bc.contracts.NEO.GetNextBlockValidatorsInternal()
+	nextVals := bc.contracts.NEO.GetNextBlockValidatorsInternal(bc.dao)
 	script, err := smartcontract.CreateDefaultMultiSigRedeemScript(nextVals)
 	if err != nil {
 		return err
 	}
 	newList = append(newList, hash.Hash160(script))
-	bc.updateExtensibleList(&newList, bc.contracts.NEO.GetNextBlockValidatorsInternal())
+	bc.updateExtensibleList(&newList, bc.contracts.NEO.GetNextBlockValidatorsInternal(bc.dao))
 
 	if len(stateVals) > 0 {
 		h, err := bc.contracts.Designate.GetLastDesignatedHash(bc.dao, noderoles.StateValidator)
@@ -1451,12 +1468,12 @@ func (bc *Blockchain) ForEachNEP11Transfer(acc util.Uint160, newestTimestamp uin
 
 // GetNEP17Contracts returns the list of deployed NEP-17 contracts.
 func (bc *Blockchain) GetNEP17Contracts() []util.Uint160 {
-	return bc.contracts.Management.GetNEP17Contracts()
+	return bc.contracts.Management.GetNEP17Contracts(bc.dao)
 }
 
 // GetNEP11Contracts returns the list of deployed NEP-11 contracts.
 func (bc *Blockchain) GetNEP11Contracts() []util.Uint160 {
-	return bc.contracts.Management.GetNEP11Contracts()
+	return bc.contracts.Management.GetNEP11Contracts(bc.dao)
 }
 
 // GetTokenLastUpdated returns a set of contract ids with the corresponding last updated
@@ -1823,7 +1840,7 @@ func (bc *Blockchain) ApplyPolicyToTxSet(txes []*transaction.Transaction) []*tra
 	curVC := bc.config.GetNumOfCNs(bc.BlockHeight() + 1)
 	if oldVC == nil || oldVC != curVC {
 		m := smartcontract.GetDefaultHonestNodeCount(curVC)
-		verification, _ := smartcontract.CreateDefaultMultiSigRedeemScript(bc.contracts.NEO.GetNextBlockValidatorsInternal())
+		verification, _ := smartcontract.CreateDefaultMultiSigRedeemScript(bc.contracts.NEO.GetNextBlockValidatorsInternal(bc.dao))
 		defaultWitness = transaction.Witness{
 			InvocationScript:   make([]byte, 66*m),
 			VerificationScript: verification,
@@ -1939,7 +1956,7 @@ func (bc *Blockchain) verifyAndPoolTx(t *transaction.Transaction, pool *mempool.
 	if err != nil {
 		return err
 	}
-	if err := bc.verifyTxAttributes(t, isPartialTx); err != nil {
+	if err := bc.verifyTxAttributes(bc.dao, t, isPartialTx); err != nil {
 		return err
 	}
 	err = pool.Add(t, feer, data...)
@@ -1963,11 +1980,11 @@ func (bc *Blockchain) verifyAndPoolTx(t *transaction.Transaction, pool *mempool.
 	return nil
 }
 
-func (bc *Blockchain) verifyTxAttributes(tx *transaction.Transaction, isPartialTx bool) error {
+func (bc *Blockchain) verifyTxAttributes(d *dao.Simple, tx *transaction.Transaction, isPartialTx bool) error {
 	for i := range tx.Attributes {
 		switch attrType := tx.Attributes[i].Type; attrType {
 		case transaction.HighPriority:
-			h := bc.contracts.NEO.GetCommitteeAddress()
+			h := bc.contracts.NEO.GetCommitteeAddress(d)
 			if !tx.HasSigner(h) {
 				return fmt.Errorf("%w: high priority tx is not signed by committee", ErrInvalidAttribute)
 			}
@@ -2061,7 +2078,7 @@ func (bc *Blockchain) IsTxStillRelevant(t *transaction.Transaction, txpool *memp
 	} else if txpool.HasConflicts(t, bc) {
 		return false
 	}
-	if err := bc.verifyTxAttributes(t, isPartialTx); err != nil {
+	if err := bc.verifyTxAttributes(bc.dao, t, isPartialTx); err != nil {
 		return false
 	}
 	for i := range t.Scripts {
@@ -2119,19 +2136,19 @@ func (bc *Blockchain) PoolTxWithData(t *transaction.Transaction, data interface{
 
 // GetCommittee returns the sorted list of public keys of nodes in committee.
 func (bc *Blockchain) GetCommittee() (keys.PublicKeys, error) {
-	pubs := bc.contracts.NEO.GetCommitteeMembers()
+	pubs := bc.contracts.NEO.GetCommitteeMembers(bc.dao)
 	sort.Sort(pubs)
 	return pubs, nil
 }
 
 // GetValidators returns current validators.
 func (bc *Blockchain) GetValidators() ([]*keys.PublicKey, error) {
-	return bc.contracts.NEO.ComputeNextBlockValidators(bc, bc.dao)
+	return bc.contracts.NEO.ComputeNextBlockValidators(bc.blockHeight, bc.dao)
 }
 
 // GetNextBlockValidators returns next block validators.
 func (bc *Blockchain) GetNextBlockValidators() ([]*keys.PublicKey, error) {
-	return bc.contracts.NEO.GetNextBlockValidatorsInternal(), nil
+	return bc.contracts.NEO.GetNextBlockValidatorsInternal(bc.dao), nil
 }
 
 // GetEnrollments returns all registered validators.
@@ -2148,6 +2165,41 @@ func (bc *Blockchain) GetTestVM(t trigger.Type, tx *transaction.Transaction, b *
 	return systemInterop
 }
 
+// GetTestHistoricVM returns an interop context with VM set up for a test run.
+func (bc *Blockchain) GetTestHistoricVM(t trigger.Type, tx *transaction.Transaction, b *block.Block) (*interop.Context, error) {
+	if bc.config.KeepOnlyLatestState {
+		return nil, errors.New("only latest state is supported")
+	}
+	if b == nil {
+		return nil, errors.New("block is mandatory to produce test historic VM")
+	}
+	var mode = mpt.ModeAll
+	if bc.config.RemoveUntraceableBlocks {
+		if b.Index < bc.BlockHeight()-bc.config.MaxTraceableBlocks {
+			return nil, fmt.Errorf("state for height %d is outdated and removed from the storage", b.Index)
+		}
+		mode |= mpt.ModeGCFlag
+	}
+	sr, err := bc.stateRoot.GetStateRoot(b.Index)
+	if err != nil {
+		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.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.
+	err = bc.initializeNativeCache(b.Index, dTrie)
+	if err != nil {
+		return nil, fmt.Errorf("failed to initialize native cache backed by historic DAO: %w", err)
+	}
+	systemInterop := bc.newInteropContext(t, dTrie, b, tx)
+	vm := systemInterop.SpawnVM()
+	vm.SetPriceGetter(systemInterop.GetPrice)
+	vm.LoadToken = contract.LoadToken(systemInterop)
+	return systemInterop, nil
+}
+
 // Various witness verification errors.
 var (
 	ErrWitnessHashMismatch         = errors.New("witness hash mismatch")

pkg/core/blockchain_core_test.go

@@ -11,7 +11,6 @@ import (
 	"github.com/nspcc-dev/neo-go/internal/testchain"
 	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
-	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/storage"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
@@ -329,7 +328,7 @@ func TestBlockchain_BaseExecFeeBaseStoragePrice_Compat(t *testing.T) {
 	bc := newTestChain(t)
 
 	check := func(t *testing.T) {
-		ic := bc.newInteropContext(trigger.Application, dao.NewSimple(storage.NewMemoryStore(), bc.config.StateRootInHeader, bc.config.P2PSigExtensions), bc.topBlock.Load().(*block.Block), nil)
+		ic := bc.newInteropContext(trigger.Application, bc.dao, bc.topBlock.Load().(*block.Block), nil)
 		require.Equal(t, bc.GetBaseExecFee(), ic.BaseExecFee())
 		require.Equal(t, bc.GetStoragePrice(), ic.BaseStorageFee())
 	}

pkg/core/blockchainer/blockchainer.go

@@ -60,6 +60,7 @@ type Blockchainer interface {
 	GetStateModule() StateRoot
 	GetStorageItem(id int32, key []byte) state.StorageItem
 	GetTestVM(t trigger.Type, tx *transaction.Transaction, b *block.Block) *interop.Context
+	GetTestHistoricVM(t trigger.Type, tx *transaction.Transaction, b *block.Block) (*interop.Context, error)
 	GetTransaction(util.Uint256) (*transaction.Transaction, uint32, error)
 	SetOracle(service services.Oracle)
 	mempool.Feer // fee interface

pkg/core/blockchainer/state_root.go

@@ -15,4 +15,5 @@ type StateRoot interface {
 	GetState(root util.Uint256, key []byte) ([]byte, error)
 	GetStateProof(root util.Uint256, key []byte) ([][]byte, error)
 	GetStateRoot(height uint32) (*state.MPTRoot, error)
+	GetLatestStateHeight(root util.Uint256) (uint32, error)
 }

pkg/core/dao/dao.go

@@ -7,6 +7,7 @@ import (
 	"errors"
 	"fmt"
 	iocore "io"
+	"sync"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
@@ -34,11 +35,28 @@ var (
 type Simple struct {
 	Version Version
 	Store   *storage.MemCachedStore
+
+	nativeCacheLock sync.RWMutex
+	nativeCache     map[int32]NativeContractCache
+	// nativeCachePS is the backend store that provides functionality to store
+	// and retrieve multi-tier native contract cache. The lowest Simple has its
+	// nativeCachePS set to nil.
+	nativeCachePS *Simple
+
 	private bool
 	keyBuf  []byte
 	dataBuf *io.BufBinWriter
 }
 
+// NativeContractCache is an interface representing cache for a native contract.
+// Cache can be copied to create a wrapper around current DAO layer. Wrapped cache
+// can be persisted to the underlying DAO native cache.
+type NativeContractCache interface {
+	// Copy returns a copy of native cache item that can safely be changed within
+	// the subsequent DAO operations.
+	Copy() NativeContractCache
+}
+
 // NewSimple creates new simple dao using provided backend store.
 func NewSimple(backend storage.Store, stateRootInHeader bool, p2pSigExtensions bool) *Simple {
 	st := storage.NewMemCachedStore(backend)
@@ -52,7 +70,8 @@ func newSimple(st *storage.MemCachedStore, stateRootInHeader bool, p2pSigExtensi
 			StateRootInHeader: stateRootInHeader,
 			P2PSigExtensions:  p2pSigExtensions,
 		},
-		Store: st,
+		Store:       st,
+		nativeCache: make(map[int32]NativeContractCache),
 	}
 }
 
@@ -66,16 +85,27 @@ func (dao *Simple) GetBatch() *storage.MemBatch {
 func (dao *Simple) GetWrapped() *Simple {
 	d := NewSimple(dao.Store, dao.Version.StateRootInHeader, dao.Version.P2PSigExtensions)
 	d.Version = dao.Version
+	d.nativeCachePS = dao
 	return d
 }
 
 // GetPrivate returns new DAO instance with another layer of private
 // MemCachedStore around the current DAO Store.
 func (dao *Simple) GetPrivate() *Simple {
-	d := &Simple{}
+	d := &Simple{
-	*d = *dao                                             // Inherit everything...
+		Version: dao.Version,
+		keyBuf:  dao.keyBuf,
+		dataBuf: dao.dataBuf,
+	} // Inherit everything...
 	d.Store = storage.NewPrivateMemCachedStore(dao.Store) // except storage, wrap another layer.
 	d.private = true
+	d.nativeCachePS = dao
+	// Do not inherit cache from nativeCachePS; instead should create clear map:
+	// GetRWCache and GetROCache will retrieve cache from the underlying
+	// nativeCache if requested. The lowest underlying DAO MUST have its native
+	// cache initialized before access it, otherwise GetROCache and GetRWCache
+	// won't work properly.
+	d.nativeCache = make(map[int32]NativeContractCache)
 	return d
 }
 
@@ -809,6 +839,17 @@ func (dao *Simple) getDataBuf() *io.BufBinWriter {
 // Persist flushes all the changes made into the (supposedly) persistent
 // underlying store. It doesn't block accesses to DAO from other threads.
 func (dao *Simple) Persist() (int, error) {
+	if dao.nativeCachePS != nil {
+		if !dao.private {
+			dao.nativeCacheLock.Lock()
+			defer dao.nativeCacheLock.Unlock()
+		}
+		if !dao.nativeCachePS.private {
+			dao.nativeCachePS.nativeCacheLock.Lock()
+			defer dao.nativeCachePS.nativeCacheLock.Unlock()
+		}
+		dao.persistNativeCache()
+	}
 	return dao.Store.Persist()
 }
 
@@ -816,5 +857,77 @@ func (dao *Simple) Persist() (int, error) {
 // underlying store. It's a synchronous version of Persist that doesn't allow
 // other threads to work with DAO while flushing the Store.
 func (dao *Simple) PersistSync() (int, error) {
+	if dao.nativeCachePS != nil {
+		dao.nativeCacheLock.Lock()
+		dao.nativeCachePS.nativeCacheLock.Lock()
+		defer func() {
+			dao.nativeCachePS.nativeCacheLock.Unlock()
+			dao.nativeCacheLock.Unlock()
+		}()
+		dao.persistNativeCache()
+	}
 	return dao.Store.PersistSync()
 }
+
+// persistNativeCache is internal unprotected method for native cache persisting.
+// It does NO checks for nativeCachePS is not nil.
+func (dao *Simple) persistNativeCache() {
+	lower := dao.nativeCachePS
+	for id, nativeCache := range dao.nativeCache {
+		lower.nativeCache[id] = nativeCache
+	}
+	dao.nativeCache = nil
+}
+
+// GetROCache returns native contact cache. The cache CAN NOT be modified by
+// the caller. It's the caller's duty to keep it unmodified.
+func (dao *Simple) GetROCache(id int32) NativeContractCache {
+	if !dao.private {
+		dao.nativeCacheLock.RLock()
+		defer dao.nativeCacheLock.RUnlock()
+	}
+
+	return dao.getCache(id, true)
+}
+
+// GetRWCache returns native contact cache. The cache CAN BE safely modified
+// by the caller.
+func (dao *Simple) GetRWCache(id int32) NativeContractCache {
+	if !dao.private {
+		dao.nativeCacheLock.Lock()
+		defer dao.nativeCacheLock.Unlock()
+	}
+
+	return dao.getCache(id, false)
+}
+
+// getCache is an internal unlocked representation of GetROCache and GetRWCache.
+func (dao *Simple) getCache(k int32, ro bool) NativeContractCache {
+	if itm, ok := dao.nativeCache[k]; ok {
+		// Don't need to create itm copy, because its value was already copied
+		// the first time it was retrieved from loser ps.
+		return itm
+	}
+
+	if dao.nativeCachePS != nil {
+		if ro {
+			return dao.nativeCachePS.GetROCache(k)
+		}
+		v := dao.nativeCachePS.GetRWCache(k)
+		if v != nil {
+			// Create a copy here in order not to modify the existing cache.
+			cp := v.Copy()
+			dao.nativeCache[k] = cp
+			return cp
+		}
+	}
+	return nil
+}
+
+// SetCache adds native contract cache to the cache map.
+func (dao *Simple) SetCache(id int32, v NativeContractCache) {
+	dao.nativeCacheLock.Lock()
+	defer dao.nativeCacheLock.Unlock()
+
+	dao.nativeCache[id] = v
+}

pkg/core/interop/context.go

@@ -13,6 +13,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/interopnames"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
+	"github.com/nspcc-dev/neo-go/pkg/core/storage"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
 	"github.com/nspcc-dev/neo-go/pkg/io"
@@ -339,3 +340,31 @@ func (ic *Context) Exec() error {
 	defer ic.Finalize()
 	return ic.VM.Run()
 }
+
+// BlockHeight returns current block height got from Context's block if it's set.
+func (ic *Context) BlockHeight() uint32 {
+	if ic.Block != nil {
+		return ic.Block.Index - 1 // Persisting block is not yet stored.
+	}
+	return ic.Chain.BlockHeight()
+}
+
+// CurrentBlockHash returns current block hash got from Context's block if it's set.
+func (ic *Context) CurrentBlockHash() util.Uint256 {
+	if ic.Block != nil {
+		return ic.Chain.GetHeaderHash(int(ic.Block.Index - 1)) // Persisting block is not yet stored.
+	}
+	return ic.Chain.CurrentBlockHash()
+}
+
+// GetBlock returns block if it exists and available at the current Context's height.
+func (ic *Context) GetBlock(hash util.Uint256) (*block.Block, error) {
+	block, err := ic.Chain.GetBlock(hash)
+	if err != nil {
+		return nil, err
+	}
+	if block.Index > ic.BlockHeight() {
+		return nil, storage.ErrKeyNotFound
+	}
+	return block, nil
+}

pkg/core/interop/contract/call.go

@@ -18,7 +18,7 @@ import (
 )
 
 type policyChecker interface {
-	IsBlockedInternal(*dao.Simple, util.Uint160) bool
+	IsBlocked(*dao.Simple, util.Uint160) bool
 }
 
 // LoadToken calls method specified by token id.
@@ -97,7 +97,7 @@ func callExFromNative(ic *interop.Context, caller util.Uint160, cs *state.Contra
 	for _, nc := range ic.Natives {
 		if nc.Metadata().Name == nativenames.Policy {
 			var pch = nc.(policyChecker)
-			if pch.IsBlockedInternal(ic.DAO, cs.Hash) {
+			if pch.IsBlocked(ic.DAO, cs.Hash) {
 				return fmt.Errorf("contract %s is blocked", cs.Hash.StringLE())
 			}
 			break

pkg/core/interop_system_core_test.go

@@ -12,7 +12,6 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
-	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/contract"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/iterator"
@@ -530,10 +529,10 @@ func TestStorageFind(t *testing.T) {
 
 // Helper functions to create VM, InteropContext, TX, Account, Contract.
 
-func createVM(t *testing.T) (*vm.VM, *interop.Context, *Blockchain) {
+func createVM(t testing.TB) (*vm.VM, *interop.Context, *Blockchain) {
 	chain := newTestChain(t)
 	context := chain.newInteropContext(trigger.Application,
-		dao.NewSimple(storage.NewMemoryStore(), chain.config.StateRootInHeader, chain.config.P2PSigExtensions), nil, nil)
+		chain.dao.GetWrapped(), nil, nil)
 	v := context.SpawnVM()
 	return v, context, chain
 }
@@ -552,10 +551,7 @@ func createVMAndContractState(t testing.TB) (*vm.VM, *state.Contract, *interop.C
 		},
 	}
 
-	chain := newTestChain(t)
+	v, context, chain := createVM(t)
-	d := dao.NewSimple(storage.NewMemoryStore(), chain.config.StateRootInHeader, chain.config.P2PSigExtensions)
-	context := chain.newInteropContext(trigger.Application, d, nil, nil)
-	v := context.SpawnVM()
 	return v, contractState, context, chain
 }
 

pkg/core/interops_test.go

@@ -5,9 +5,7 @@ import (
 	"runtime"
 	"testing"
 
-	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
-	"github.com/nspcc-dev/neo-go/pkg/core/storage"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
 	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/stretchr/testify/require"
@@ -17,8 +15,7 @@ func testNonInterop(t *testing.T, value interface{}, f func(*interop.Context) er
 	v := vm.New()
 	v.Estack().PushVal(value)
 	chain := newTestChain(t)
-	d := dao.NewSimple(storage.NewMemoryStore(), chain.config.StateRootInHeader, chain.config.P2PSigExtensions)
+	context := chain.newInteropContext(trigger.Application, chain.dao, nil, nil)
-	context := chain.newInteropContext(trigger.Application, d, nil, nil)
 	context.VM = v
 	require.Error(t, f(context))
 }

pkg/core/mpt/billet.go

@@ -205,7 +205,7 @@ func (b *Billet) incrementRefAndStore(h util.Uint256, bs []byte) {
 // returned from `process` function. It also replaces all HashNodes to their
 // "unhashed" counterparts until the stop condition is satisfied.
 func (b *Billet) Traverse(process func(pathToNode []byte, node Node, nodeBytes []byte) bool, ignoreStorageErr bool) error {
-	r, err := b.traverse(b.root, []byte{}, []byte{}, process, ignoreStorageErr)
+	r, err := b.traverse(b.root, []byte{}, []byte{}, process, ignoreStorageErr, false)
 	if err != nil && !errors.Is(err, errStop) {
 		return err
 	}
@@ -213,7 +213,7 @@ func (b *Billet) Traverse(process func(pathToNode []byte, node Node, nodeBytes [
 	return nil
 }
 
-func (b *Billet) traverse(curr Node, path, from []byte, process func(pathToNode []byte, node Node, nodeBytes []byte) bool, ignoreStorageErr bool) (Node, error) {
+func (b *Billet) traverse(curr Node, path, from []byte, process func(pathToNode []byte, node Node, nodeBytes []byte) bool, ignoreStorageErr bool, backwards bool) (Node, error) {
 	if _, ok := curr.(EmptyNode); ok {
 		// We're not interested in EmptyNodes, and they do not affect the
 		// traversal process, thus remain them untouched.
@@ -227,7 +227,7 @@ func (b *Billet) traverse(curr Node, path, from []byte, process func(pathToNode
 			}
 			return nil, err
 		}
-		return b.traverse(r, path, from, process, ignoreStorageErr)
+		return b.traverse(r, path, from, process, ignoreStorageErr, backwards)
 	}
 	if len(from) == 0 {
 		bytes := slice.Copy(curr.Bytes())
@@ -242,22 +242,36 @@ func (b *Billet) traverse(curr Node, path, from []byte, process func(pathToNode
 		var (
 			startIndex byte
 			endIndex   byte = childrenCount
+			cmp             = func(i int) bool {
+				return i < int(endIndex)
+			}
+			step = 1
 		)
+		if backwards {
+			startIndex, endIndex = lastChild, startIndex
+			cmp = func(i int) bool {
+				return i >= int(endIndex)
+			}
+			step = -1
+		}
 		if len(from) != 0 {
 			endIndex = lastChild
+			if backwards {
+				endIndex = 0
+			}
 			startIndex, from = splitPath(from)
 		}
-		for i := startIndex; i < endIndex; i++ {
+		for i := int(startIndex); cmp(i); i += step {
 			var newPath []byte
 			if i == lastChild {
 				newPath = path
 			} else {
-				newPath = append(path, i)
+				newPath = append(path, byte(i))
 			}
-			if i != startIndex {
+			if byte(i) != startIndex {
 				from = []byte{}
 			}
-			r, err := b.traverse(n.Children[i], newPath, from, process, ignoreStorageErr)
+			r, err := b.traverse(n.Children[i], newPath, from, process, ignoreStorageErr, backwards)
 			if err != nil {
 				if !errors.Is(err, errStop) {
 					return nil, err
@@ -276,7 +290,7 @@ func (b *Billet) traverse(curr Node, path, from []byte, process func(pathToNode
 		} else {
 			return b.tryCollapseExtension(n), nil
 		}
-		r, err := b.traverse(n.next, append(path, n.key...), from, process, ignoreStorageErr)
+		r, err := b.traverse(n.next, append(path, n.key...), from, process, ignoreStorageErr, backwards)
 		if err != nil && !errors.Is(err, errStop) {
 			return nil, err
 		}

pkg/core/mpt/trie.go

@@ -625,7 +625,7 @@ func (t *Trie) Find(prefix, from []byte, max int) ([]storage.KeyValue, error) {
 		}
 		return count >= max
 	}
-	_, err = b.traverse(start, path, fromP, process, false)
+	_, err = b.traverse(start, path, fromP, process, false, false)
 	if err != nil && !errors.Is(err, errStop) {
 		return nil, err
 	}

pkg/core/mpt/trie_store.go

@@ -0,0 +1,126 @@
+package mpt
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+
+	"github.com/nspcc-dev/neo-go/pkg/core/storage"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/util/slice"
+)
+
+// TrieStore is an MPT-based storage implementation for storing and retrieving
+// historic blockchain data. TrieStore is supposed to be used within transaction
+// script invocations only, thus only contract storage related operations are
+// supported. All storage-related operations are being performed using historical
+// storage data retrieved from MPT state. TrieStore is read-only and does not
+// support put-related operations, thus, it should always be wrapped into
+// MemCachedStore for proper puts handling. TrieStore never changes the provided
+// backend store.
+type TrieStore struct {
+	trie *Trie
+}
+
+// ErrForbiddenTrieStoreOperation is returned when operation is not supposed to
+// be performed over MPT-based Store.
+var ErrForbiddenTrieStoreOperation = errors.New("operation is not allowed to be performed over TrieStore")
+
+// NewTrieStore returns a new ready to use MPT-backed storage.
+func NewTrieStore(root util.Uint256, mode TrieMode, backed storage.Store) *TrieStore {
+	cache, ok := backed.(*storage.MemCachedStore)
+	if !ok {
+		cache = storage.NewMemCachedStore(backed)
+	}
+	tr := NewTrie(NewHashNode(root), mode, cache)
+	return &TrieStore{
+		trie: tr,
+	}
+}
+
+// Get implements the Store interface.
+func (m *TrieStore) Get(key []byte) ([]byte, error) {
+	if len(key) == 0 {
+		return nil, fmt.Errorf("%w: Get is supported only for contract storage items", ErrForbiddenTrieStoreOperation)
+	}
+	switch storage.KeyPrefix(key[0]) {
+	case storage.STStorage, storage.STTempStorage:
+		res, err := m.trie.Get(key[1:])
+		if err != nil && errors.Is(err, ErrNotFound) {
+			// Mimic the real storage behaviour.
+			return nil, storage.ErrKeyNotFound
+		}
+		return res, err
+	default:
+		return nil, fmt.Errorf("%w: Get is supported only for contract storage items", ErrForbiddenTrieStoreOperation)
+	}
+}
+
+// PutChangeSet implements the Store interface.
+func (m *TrieStore) PutChangeSet(puts map[string][]byte, stor map[string][]byte) error {
+	// Only Get and Seek should be supported, as TrieStore is read-only and is always
+	// should be wrapped by MemCachedStore to properly support put operations (if any).
+	return fmt.Errorf("%w: PutChangeSet is not supported", ErrForbiddenTrieStoreOperation)
+}
+
+// Seek implements the Store interface.
+func (m *TrieStore) Seek(rng storage.SeekRange, f func(k, v []byte) bool) {
+	prefix := storage.KeyPrefix(rng.Prefix[0])
+	if prefix != storage.STStorage && prefix != storage.STTempStorage { // Prefix is always non-empty.
+		panic(fmt.Errorf("%w: Seek is supported only for contract storage items", ErrForbiddenTrieStoreOperation))
+	}
+	prefixP := toNibbles(rng.Prefix[1:])
+	fromP := []byte{}
+	if len(rng.Start) > 0 {
+		fromP = toNibbles(rng.Start)
+	}
+	_, start, path, err := m.trie.getWithPath(m.trie.root, prefixP, false)
+	if err != nil {
+		// Failed to determine the start node => no matching items.
+		return
+	}
+	path = path[len(prefixP):]
+
+	if len(fromP) > 0 {
+		if len(path) <= len(fromP) && bytes.HasPrefix(fromP, path) {
+			fromP = fromP[len(path):]
+		} else if len(path) > len(fromP) && bytes.HasPrefix(path, fromP) {
+			fromP = []byte{}
+		} else {
+			cmp := bytes.Compare(path, fromP)
+			if cmp < 0 == rng.Backwards {
+				// No matching items.
+				return
+			}
+			fromP = []byte{}
+		}
+	}
+
+	b := NewBillet(m.trie.root.Hash(), m.trie.mode, 0, m.trie.Store)
+	process := func(pathToNode []byte, node Node, _ []byte) bool {
+		if leaf, ok := node.(*LeafNode); ok {
+			// (*Billet).traverse includes `from` path into the result if so. It's OK for Seek, so shouldn't be filtered out.
+			kv := storage.KeyValue{
+				Key:   append(slice.Copy(rng.Prefix), pathToNode...), // Do not cut prefix.
+				Value: slice.Copy(leaf.value),
+			}
+			return !f(kv.Key, kv.Value) // Should return whether to stop.
+		}
+		return false
+	}
+	_, err = b.traverse(start, path, fromP, process, false, rng.Backwards)
+	if err != nil && !errors.Is(err, errStop) {
+		panic(fmt.Errorf("failed to perform Seek operation on TrieStore: %w", err))
+	}
+}
+
+// SeekGC implements the Store interface.
+func (m *TrieStore) SeekGC(rng storage.SeekRange, keep func(k, v []byte) bool) error {
+	return fmt.Errorf("%w: SeekGC is not supported", ErrForbiddenTrieStoreOperation)
+}
+
+// Close implements the Store interface.
+func (m *TrieStore) Close() error {
+	m.trie = nil
+	return nil
+}

pkg/core/mpt/trie_store_test.go

@@ -0,0 +1,73 @@
+package mpt
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/core/storage"
+	"github.com/stretchr/testify/require"
+)
+
+func TestTrieStore_TestTrieOperations(t *testing.T) {
+	source := newTestTrie(t)
+	backed := source.Store
+
+	st := NewTrieStore(source.root.Hash(), ModeAll, backed)
+
+	t.Run("forbidden operations", func(t *testing.T) {
+		require.ErrorIs(t, st.SeekGC(storage.SeekRange{}, nil), ErrForbiddenTrieStoreOperation)
+		_, err := st.Get([]byte{byte(storage.STTokenTransferInfo)})
+		require.ErrorIs(t, err, ErrForbiddenTrieStoreOperation)
+		require.ErrorIs(t, st.PutChangeSet(nil, nil), ErrForbiddenTrieStoreOperation)
+	})
+
+	t.Run("Get", func(t *testing.T) {
+		t.Run("good", func(t *testing.T) {
+			res, err := st.Get(append([]byte{byte(storage.STStorage)}, 0xAC, 0xae)) // leaf `hello`
+			require.NoError(t, err)
+			require.Equal(t, []byte("hello"), res)
+		})
+		t.Run("bad path", func(t *testing.T) {
+			_, err := st.Get(append([]byte{byte(storage.STStorage)}, 0xAC, 0xa0)) // bad path
+			require.ErrorIs(t, err, storage.ErrKeyNotFound)
+		})
+		t.Run("path to not-a-leaf", func(t *testing.T) {
+			_, err := st.Get(append([]byte{byte(storage.STStorage)}, 0xAC)) // path to extension
+			require.ErrorIs(t, err, storage.ErrKeyNotFound)
+		})
+	})
+
+	t.Run("Seek", func(t *testing.T) {
+		check := func(t *testing.T, backwards bool) {
+			var res [][]byte
+			st.Seek(storage.SeekRange{
+				Prefix:    []byte{byte(storage.STStorage)},
+				Start:     nil,
+				Backwards: backwards,
+			}, func(k, v []byte) bool {
+				res = append(res, k)
+				return true
+			})
+			require.Equal(t, 4, len(res))
+			for i := 0; i < len(res); i++ {
+				require.Equal(t, byte(storage.STStorage), res[i][0])
+				if i < len(res)-1 {
+					cmp := bytes.Compare(res[i], res[i+1])
+					if backwards {
+						require.True(t, cmp > 0)
+					} else {
+						require.True(t, cmp < 0)
+					}
+				}
+			}
+		}
+		t.Run("good: over whole storage", func(t *testing.T) {
+			t.Run("forwards", func(t *testing.T) {
+				check(t, false)
+			})
+			t.Run("backwards", func(t *testing.T) {
+				check(t, true)
+			})
+		})
+	})
+}

pkg/core/native/contract.go

@@ -76,7 +76,7 @@ func NewContracts(cfg config.ProtocolConfiguration) *Contracts {
 	cs.Contracts = append(cs.Contracts, ledger)
 
 	gas := newGAS(int64(cfg.InitialGASSupply), cfg.P2PSigExtensions)
-	neo := newNEO()
+	neo := newNEO(cfg)
 	policy := newPolicy()
 	neo.GAS = gas
 	neo.Policy = policy

pkg/core/native/designate.go

@@ -3,6 +3,7 @@ package native
 import (
 	"encoding/binary"
 	"errors"
+	"fmt"
 	"math"
 	"math/big"
 	"sort"
@@ -31,12 +32,6 @@ type Designate struct {
 	interop.ContractMD
 	NEO *NEO
 
-	rolesChangedFlag atomic.Value
-	oracles          atomic.Value
-	stateVals        atomic.Value
-	neofsAlphabet    atomic.Value
-	notaries         atomic.Value
-
 	// p2pSigExtensionsEnabled defines whether the P2P signature extensions logic is relevant.
 	p2pSigExtensionsEnabled bool
 
@@ -53,6 +48,16 @@ type roleData struct {
 	height uint32
 }
 
+type DesignationCache struct {
+	// rolesChangedFlag shows whether any of designated nodes were changed within the current block.
+	// It is used to notify dependant services about updated node roles during PostPersist.
+	rolesChangedFlag bool
+	oracles          roleData
+	stateVals        roleData
+	neofsAlphabet    roleData
+	notaries         roleData
+}
+
 const (
 	designateContractID = -8
 
@@ -73,6 +78,22 @@ var (
 	ErrNoBlock           = errors.New("no persisting block in the context")
 )
 
+var (
+	_ interop.Contract        = (*Designate)(nil)
+	_ dao.NativeContractCache = (*DesignationCache)(nil)
+)
+
+// Copy implements NativeContractCache interface.
+func (c *DesignationCache) Copy() dao.NativeContractCache {
+	cp := &DesignationCache{}
+	copyDesignationCache(c, cp)
+	return cp
+}
+
+func copyDesignationCache(src, dst *DesignationCache) {
+	*dst = *src
+}
+
 func (s *Designate) isValidRole(r noderoles.Role) bool {
 	return r == noderoles.Oracle || r == noderoles.StateValidator ||
 		r == noderoles.NeoFSAlphabet || (s.p2pSigExtensionsEnabled && r == noderoles.P2PNotary)
@@ -102,8 +123,30 @@ func newDesignate(p2pSigExtensionsEnabled bool) *Designate {
 	return s
 }
 
-// Initialize initializes Oracle contract.
+// Initialize initializes Designation contract. It is called once at native Management's OnPersist
+// at the genesis block, and we can't properly fill the cache at this point, as there are no roles
+// data in the storage.
 func (s *Designate) Initialize(ic *interop.Context) error {
+	cache := &DesignationCache{}
+	ic.DAO.SetCache(s.ID, cache)
+	return nil
+}
+
+// InitializeCache fills native Designate cache from DAO. It is called at non-zero height, thus
+// we can fetch the roles data right from the storage.
+func (s *Designate) InitializeCache(d *dao.Simple) error {
+	cache := &DesignationCache{}
+	roles := []noderoles.Role{noderoles.Oracle, noderoles.NeoFSAlphabet, noderoles.StateValidator}
+	if s.p2pSigExtensionsEnabled {
+		roles = append(roles, noderoles.P2PNotary)
+	}
+	for _, r := range roles {
+		err := s.updateCachedRoleData(cache, d, r)
+		if err != nil {
+			return fmt.Errorf("failed to get nodes from storage for %d role: %w", r, err)
+		}
+	}
+	d.SetCache(s.ID, cache)
 	return nil
 }
 
@@ -114,26 +157,19 @@ func (s *Designate) OnPersist(ic *interop.Context) error {
 
 // PostPersist implements Contract interface.
 func (s *Designate) PostPersist(ic *interop.Context) error {
-	if !s.rolesChanged() {
+	cache := ic.DAO.GetRWCache(s.ID).(*DesignationCache)
+	if !cache.rolesChangedFlag {
 		return nil
 	}
 
-	if err := s.updateCachedRoleData(&s.oracles, ic.DAO, noderoles.Oracle); err != nil {
+	s.notifyRoleChanged(&cache.oracles, noderoles.Oracle)
-		return err
+	s.notifyRoleChanged(&cache.stateVals, noderoles.StateValidator)
-	}
+	s.notifyRoleChanged(&cache.neofsAlphabet, noderoles.NeoFSAlphabet)
-	if err := s.updateCachedRoleData(&s.stateVals, ic.DAO, noderoles.StateValidator); err != nil {
-		return err
-	}
-	if err := s.updateCachedRoleData(&s.neofsAlphabet, ic.DAO, noderoles.NeoFSAlphabet); err != nil {
-		return err
-	}
 	if s.p2pSigExtensionsEnabled {
-		if err := s.updateCachedRoleData(&s.notaries, ic.DAO, noderoles.P2PNotary); err != nil {
+		s.notifyRoleChanged(&cache.notaries, noderoles.P2PNotary)
-			return err
-		}
 	}
 
-	s.rolesChangedFlag.Store(false)
+	cache.rolesChangedFlag = false
 	return nil
 }
 
@@ -152,7 +188,7 @@ func (s *Designate) getDesignatedByRole(ic *interop.Context, args []stackitem.It
 		panic(ErrInvalidIndex)
 	}
 	index := ind.Uint64()
-	if index > uint64(ic.Chain.BlockHeight()+1) {
+	if index > uint64(ic.BlockHeight()+1) {
 		panic(ErrInvalidIndex)
 	}
 	pubs, _, err := s.GetDesignatedByRole(ic.DAO, r, uint32(index))
@@ -162,11 +198,6 @@ func (s *Designate) getDesignatedByRole(ic *interop.Context, args []stackitem.It
 	return pubsToArray(pubs)
 }
 
-func (s *Designate) rolesChanged() bool {
-	rc := s.rolesChangedFlag.Load()
-	return rc == nil || rc.(bool)
-}
-
 func (s *Designate) hashFromNodes(r noderoles.Role, nodes keys.PublicKeys) util.Uint160 {
 	if len(nodes) == 0 {
 		return util.Uint160{}
@@ -181,47 +212,58 @@ func (s *Designate) hashFromNodes(r noderoles.Role, nodes keys.PublicKeys) util.
 	return hash.Hash160(script)
 }
 
-func (s *Designate) updateCachedRoleData(v *atomic.Value, d *dao.Simple, r noderoles.Role) error {
+// updateCachedRoleData fetches the most recent role data from the storage and
-	nodeKeys, height, err := s.GetDesignatedByRole(d, r, math.MaxUint32)
+// updates the given cache.
+func (s *Designate) updateCachedRoleData(cache *DesignationCache, d *dao.Simple, r noderoles.Role) error {
+	var v *roleData
+	switch r {
+	case noderoles.Oracle:
+		v = &cache.oracles
+	case noderoles.StateValidator:
+		v = &cache.stateVals
+	case noderoles.NeoFSAlphabet:
+		v = &cache.neofsAlphabet
+	case noderoles.P2PNotary:
+		v = &cache.notaries
+	}
+	nodeKeys, height, err := s.getDesignatedByRoleFromStorage(d, r, math.MaxUint32)
 	if err != nil {
 		return err
 	}
-	v.Store(&roleData{
+	v.nodes = nodeKeys
-		nodes:  nodeKeys,
+	v.addr = s.hashFromNodes(r, nodeKeys)
-		addr:   s.hashFromNodes(r, nodeKeys),
+	v.height = height
-		height: height,
+	cache.rolesChangedFlag = true
-	})
-	switch r {
-	case noderoles.Oracle:
-		if orc, _ := s.OracleService.Load().(services.Oracle); orc != nil {
-			orc.UpdateOracleNodes(nodeKeys.Copy())
-		}
-	case noderoles.P2PNotary:
-		if ntr, _ := s.NotaryService.Load().(services.Notary); ntr != nil {
-			ntr.UpdateNotaryNodes(nodeKeys.Copy())
-		}
-	case noderoles.StateValidator:
-		if s.StateRootService != nil {
-			s.StateRootService.UpdateStateValidators(height, nodeKeys.Copy())
-		}
-	}
 	return nil
 }
 
-func (s *Designate) getCachedRoleData(r noderoles.Role) *roleData {
+func (s *Designate) notifyRoleChanged(v *roleData, r noderoles.Role) {
-	var val interface{}
 	switch r {
 	case noderoles.Oracle:
-		val = s.oracles.Load()
+		if orc, _ := s.OracleService.Load().(services.Oracle); orc != nil {
-	case noderoles.StateValidator:
+			orc.UpdateOracleNodes(v.nodes.Copy())
-		val = s.stateVals.Load()
+		}
-	case noderoles.NeoFSAlphabet:
-		val = s.neofsAlphabet.Load()
 	case noderoles.P2PNotary:
-		val = s.notaries.Load()
+		if ntr, _ := s.NotaryService.Load().(services.Notary); ntr != nil {
+			ntr.UpdateNotaryNodes(v.nodes.Copy())
+		}
+	case noderoles.StateValidator:
+		if s.StateRootService != nil {
+			s.StateRootService.UpdateStateValidators(v.height, v.nodes.Copy())
+		}
 	}
-	if val != nil {
+}
-		return val.(*roleData)
+
+func getCachedRoleData(cache *DesignationCache, r noderoles.Role) *roleData {
+	switch r {
+	case noderoles.Oracle:
+		return &cache.oracles
+	case noderoles.StateValidator:
+		return &cache.stateVals
+	case noderoles.NeoFSAlphabet:
+		return &cache.neofsAlphabet
+	case noderoles.P2PNotary:
+		return &cache.notaries
 	}
 	return nil
 }
@@ -231,17 +273,11 @@ func (s *Designate) GetLastDesignatedHash(d *dao.Simple, r noderoles.Role) (util
 	if !s.isValidRole(r) {
 		return util.Uint160{}, ErrInvalidRole
 	}
-	if !s.rolesChanged() {
+	cache := d.GetROCache(s.ID).(*DesignationCache)
-		if val := s.getCachedRoleData(r); val != nil {
+	if val := getCachedRoleData(cache, r); val != nil {
-			return val.addr, nil
+		return val.addr, nil
-		}
 	}
-	nodes, _, err := s.GetDesignatedByRole(d, r, math.MaxUint32)
+	return util.Uint160{}, nil
-	if err != nil {
-		return util.Uint160{}, err
-	}
-	// We only have hashing defined for oracles now.
-	return s.hashFromNodes(r, nodes), nil
 }
 
 // GetDesignatedByRole returns nodes for role r.
@@ -249,11 +285,22 @@ func (s *Designate) GetDesignatedByRole(d *dao.Simple, r noderoles.Role, index u
 	if !s.isValidRole(r) {
 		return nil, 0, ErrInvalidRole
 	}
-	if !s.rolesChanged() {
+	cache := d.GetROCache(s.ID).(*DesignationCache)
-		if val := s.getCachedRoleData(r); val != nil && val.height <= index {
+	if val := getCachedRoleData(cache, r); val != nil {
+		if val.height <= index {
 			return val.nodes.Copy(), val.height, nil
 		}
+	} else {
+		// Cache is always valid, thus if there's no cache then there's no designated nodes for this role.
+		return nil, 0, nil
 	}
+	// Cache stores only latest designated nodes, so if the old info is requested, then we still need
+	// to search in the storage.
+	return s.getDesignatedByRoleFromStorage(d, r, index)
+}
+
+// getDesignatedByRoleFromStorage returns nodes for role r from the storage.
+func (s *Designate) getDesignatedByRoleFromStorage(d *dao.Simple, r noderoles.Role, index uint32) (keys.PublicKeys, uint32, error) {
 	var (
 		ns        NodeList
 		bestIndex uint32
@@ -310,7 +357,7 @@ func (s *Designate) DesignateAsRole(ic *interop.Context, r noderoles.Role, pubs
 	if !s.isValidRole(r) {
 		return ErrInvalidRole
 	}
-	h := s.NEO.GetCommitteeAddress()
+	h := s.NEO.GetCommitteeAddress(ic.DAO)
 	if ok, err := runtime.CheckHashedWitness(ic, h); err != nil || !ok {
 		return ErrInvalidWitness
 	}
@@ -327,12 +374,18 @@ func (s *Designate) DesignateAsRole(ic *interop.Context, r noderoles.Role, pubs
 	}
 	sort.Sort(pubs)
 	nl := NodeList(pubs)
-	s.rolesChangedFlag.Store(true)
+
 	err := putConvertibleToDAO(s.ID, ic.DAO, key, &nl)
 	if err != nil {
 		return err
 	}
 
+	cache := ic.DAO.GetRWCache(s.ID).(*DesignationCache)
+	err = s.updateCachedRoleData(cache, ic.DAO, r)
+	if err != nil {
+		return fmt.Errorf("failed to update Designation role data cache: %w", err)
+	}
+
 	ic.Notifications = append(ic.Notifications, state.NotificationEvent{
 		ScriptHash: s.Hash,
 		Name:       DesignationEventName,
@@ -355,8 +408,3 @@ func (s *Designate) getRole(item stackitem.Item) (noderoles.Role, bool) {
 	u := bi.Uint64()
 	return noderoles.Role(u), u <= math.MaxUint8 && s.isValidRole(noderoles.Role(u))
 }
-
-// InitializeCache invalidates native Designate cache.
-func (s *Designate) InitializeCache() {
-	s.rolesChangedFlag.Store(true)
-}

pkg/core/native/interop.go

@@ -31,7 +31,7 @@ func Call(ic *interop.Context) error {
 	if len(history) == 0 {
 		return fmt.Errorf("native contract %s is disabled", c.Metadata().Name)
 	}
-	if history[0] > ic.Chain.BlockHeight() {
+	if history[0] > ic.BlockHeight() {
 		return fmt.Errorf("native contract %s is active after height = %d", c.Metadata().Name, history[0])
 	}
 	m, ok := c.Metadata().GetMethodByOffset(ic.VM.Context().IP())

pkg/core/native/ledger.go

@@ -103,19 +103,19 @@ func (l *Ledger) PostPersist(ic *interop.Context) error {
 
 // currentHash implements currentHash SC method.
 func (l *Ledger) currentHash(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
-	return stackitem.Make(ic.Chain.CurrentBlockHash().BytesBE())
+	return stackitem.Make(ic.CurrentBlockHash().BytesBE())
 }
 
 // currentIndex implements currentIndex SC method.
 func (l *Ledger) currentIndex(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
-	return stackitem.Make(ic.Chain.BlockHeight())
+	return stackitem.Make(ic.BlockHeight())
 }
 
 // getBlock implements getBlock SC method.
 func (l *Ledger) getBlock(ic *interop.Context, params []stackitem.Item) stackitem.Item {
-	hash := getBlockHashFromItem(ic.Chain, params[0])
+	hash := getBlockHashFromItem(ic, params[0])
-	block, err := ic.Chain.GetBlock(hash)
+	block, err := ic.GetBlock(hash)
-	if err != nil || !isTraceableBlock(ic.Chain, block.Index) {
+	if err != nil || !isTraceableBlock(ic, block.Index) {
 		return stackitem.Null{}
 	}
 	return BlockToStackItem(block)
@@ -124,7 +124,7 @@ func (l *Ledger) getBlock(ic *interop.Context, params []stackitem.Item) stackite
 // getTransaction returns transaction to the SC.
 func (l *Ledger) getTransaction(ic *interop.Context, params []stackitem.Item) stackitem.Item {
 	tx, h, err := getTransactionAndHeight(ic.DAO, params[0])
-	if err != nil || !isTraceableBlock(ic.Chain, h) {
+	if err != nil || !isTraceableBlock(ic, h) {
 		return stackitem.Null{}
 	}
 	return TransactionToStackItem(tx)
@@ -133,7 +133,7 @@ func (l *Ledger) getTransaction(ic *interop.Context, params []stackitem.Item) st
 // getTransactionHeight returns transaction height to the SC.
 func (l *Ledger) getTransactionHeight(ic *interop.Context, params []stackitem.Item) stackitem.Item {
 	_, h, err := getTransactionAndHeight(ic.DAO, params[0])
-	if err != nil || !isTraceableBlock(ic.Chain, h) {
+	if err != nil || !isTraceableBlock(ic, h) {
 		return stackitem.Make(-1)
 	}
 	return stackitem.Make(h)
@@ -142,10 +142,10 @@ func (l *Ledger) getTransactionHeight(ic *interop.Context, params []stackitem.It
 // getTransactionFromBlock returns transaction with the given index from the
 // block with height or hash specified.
 func (l *Ledger) getTransactionFromBlock(ic *interop.Context, params []stackitem.Item) stackitem.Item {
-	hash := getBlockHashFromItem(ic.Chain, params[0])
+	hash := getBlockHashFromItem(ic, params[0])
 	index := toUint32(params[1])
-	block, err := ic.Chain.GetBlock(hash)
+	block, err := ic.GetBlock(hash)
-	if err != nil || !isTraceableBlock(ic.Chain, block.Index) {
+	if err != nil || !isTraceableBlock(ic, block.Index) {
 		return stackitem.Null{}
 	}
 	if index >= uint32(len(block.Transactions)) {
@@ -157,7 +157,7 @@ func (l *Ledger) getTransactionFromBlock(ic *interop.Context, params []stackitem
 // getTransactionSigners returns transaction signers to the SC.
 func (l *Ledger) getTransactionSigners(ic *interop.Context, params []stackitem.Item) stackitem.Item {
 	tx, h, err := getTransactionAndHeight(ic.DAO, params[0])
-	if err != nil || !isTraceableBlock(ic.Chain, h) {
+	if err != nil || !isTraceableBlock(ic, h) {
 		return stackitem.Null{}
 	}
 	return SignersToStackItem(tx.Signers)
@@ -170,7 +170,7 @@ func (l *Ledger) getTransactionVMState(ic *interop.Context, params []stackitem.I
 		panic(err)
 	}
 	h, _, aer, err := ic.DAO.GetTxExecResult(hash)
-	if err != nil || !isTraceableBlock(ic.Chain, h) {
+	if err != nil || !isTraceableBlock(ic, h) {
 		return stackitem.Make(vm.NoneState)
 	}
 	return stackitem.Make(aer.VMState)
@@ -178,9 +178,9 @@ func (l *Ledger) getTransactionVMState(ic *interop.Context, params []stackitem.I
 
 // isTraceableBlock defines whether we're able to give information about
 // the block with index specified.
-func isTraceableBlock(bc interop.Ledger, index uint32) bool {
+func isTraceableBlock(ic *interop.Context, index uint32) bool {
-	height := bc.BlockHeight()
+	height := ic.BlockHeight()
-	MaxTraceableBlocks := bc.GetConfig().MaxTraceableBlocks
+	MaxTraceableBlocks := ic.Chain.GetConfig().MaxTraceableBlocks
 	return index <= height && index+MaxTraceableBlocks > height
 }
 
@@ -188,17 +188,17 @@ func isTraceableBlock(bc interop.Ledger, index uint32) bool {
 // Ledger if needed. Interop functions accept both block numbers and
 // block hashes as parameters, thus this function is needed. It's supposed to
 // be called within VM context, so it panics if anything goes wrong.
-func getBlockHashFromItem(bc interop.Ledger, item stackitem.Item) util.Uint256 {
+func getBlockHashFromItem(ic *interop.Context, item stackitem.Item) util.Uint256 {
 	bigindex, err := item.TryInteger()
 	if err == nil && bigindex.IsUint64() {
 		index := bigindex.Uint64()
 		if index > math.MaxUint32 {
 			panic("bad block index")
 		}
-		if uint32(index) > bc.BlockHeight() {
+		if uint32(index) > ic.BlockHeight() {
 			panic(fmt.Errorf("no block with index %d", index))
 		}
-		return bc.GetHeaderHash(int(index))
+		return ic.Chain.GetHeaderHash(int(index))
 	}
 	hash, err := getUint256FromItem(item)
 	if err != nil {

pkg/core/native/management.go

@@ -6,7 +6,6 @@ import (
 	"fmt"
 	"math"
 	"math/big"
-	"sync"
 	"unicode/utf8"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
@@ -30,8 +29,9 @@ import (
 type Management struct {
 	interop.ContractMD
 	NEO *NEO
+}
 
-	mtx       sync.RWMutex
+type ManagementCache struct {
 	contracts map[util.Uint160]*state.Contract
 	// nep11 is a map of NEP11-compliant contracts which is updated with every PostPersist.
 	nep11 map[util.Uint160]struct{}
@@ -57,6 +57,33 @@ var (
 	keyMinimumDeploymentFee = []byte{20}
 )
 
+var (
+	_ interop.Contract        = (*Management)(nil)
+	_ dao.NativeContractCache = (*ManagementCache)(nil)
+)
+
+// Copy implements NativeContractCache interface.
+func (c *ManagementCache) Copy() dao.NativeContractCache {
+	cp := &ManagementCache{
+		contracts: make(map[util.Uint160]*state.Contract),
+		nep11:     make(map[util.Uint160]struct{}),
+		nep17:     make(map[util.Uint160]struct{}),
+	}
+	// Copy the whole set of contracts is too expensive. We will create a separate map
+	// holding the same set of pointers to contracts, and in case if some contract is
+	// supposed to be changed, Management will create the copy in-place.
+	for hash, ctr := range c.contracts {
+		cp.contracts[hash] = ctr
+	}
+	for hash := range c.nep17 {
+		cp.nep17[hash] = struct{}{}
+	}
+	for hash := range c.nep11 {
+		cp.nep11[hash] = struct{}{}
+	}
+	return cp
+}
+
 // MakeContractKey creates a key from account script hash.
 func MakeContractKey(h util.Uint160) []byte {
 	return makeUint160Key(prefixContract, h)
@@ -66,9 +93,6 @@ func MakeContractKey(h util.Uint160) []byte {
 func newManagement() *Management {
 	var m = &Management{
 		ContractMD: *interop.NewContractMD(nativenames.Management, ManagementContractID),
-		contracts:  make(map[util.Uint160]*state.Contract),
-		nep11:      make(map[util.Uint160]struct{}),
-		nep17:      make(map[util.Uint160]struct{}),
 	}
 	defer m.UpdateHash()
 
@@ -146,25 +170,12 @@ func (m *Management) getContract(ic *interop.Context, args []stackitem.Item) sta
 
 // GetContract returns contract with given hash from given DAO.
 func (m *Management) GetContract(d *dao.Simple, hash util.Uint160) (*state.Contract, error) {
-	m.mtx.RLock()
+	cache := d.GetROCache(m.ID).(*ManagementCache)
-	cs, ok := m.contracts[hash]
+	cs, ok := cache.contracts[hash]
-	m.mtx.RUnlock()
 	if !ok {
 		return nil, storage.ErrKeyNotFound
-	} else if cs != nil {
-		return cs, nil
 	}
-	return m.getContractFromDAO(d, hash)
+	return cs, nil
-}
-
-func (m *Management) getContractFromDAO(d *dao.Simple, hash util.Uint160) (*state.Contract, error) {
-	contract := new(state.Contract)
-	key := MakeContractKey(hash)
-	err := getConvertibleFromDAO(m.ID, d, key, contract)
-	if err != nil {
-		return nil, err
-	}
-	return contract, nil
 }
 
 func getLimitedSlice(arg stackitem.Item, max int) ([]byte, error) {
@@ -260,20 +271,23 @@ func (m *Management) deployWithData(ic *interop.Context, args []stackitem.Item)
 	return contractToStack(newcontract)
 }
 
-func (m *Management) markUpdated(h util.Uint160) {
+func (m *Management) markUpdated(d *dao.Simple, hash util.Uint160, cs *state.Contract) {
-	m.mtx.Lock()
+	cache := d.GetRWCache(m.ID).(*ManagementCache)
-	// Just set it to nil, to refresh cache in `PostPersist`.
+	delete(cache.nep11, hash)
-	m.contracts[h] = nil
+	delete(cache.nep17, hash)
-	m.mtx.Unlock()
+	if cs == nil {
+		delete(cache.contracts, hash)
+		return
+	}
+	updateContractCache(cache, cs)
 }
 
 // Deploy creates contract's hash/ID and saves new contract into the given DAO.
 // It doesn't run _deploy method and doesn't emit notification.
 func (m *Management) Deploy(d *dao.Simple, sender util.Uint160, neff *nef.File, manif *manifest.Manifest) (*state.Contract, error) {
 	h := state.CreateContractHash(sender, neff.Checksum, manif.Name)
-	key := MakeContractKey(h)
+	_, err := m.GetContract(d, h)
-	si := d.GetStorageItem(m.ID, key)
+	if err == nil {
-	if si != nil {
 		return nil, errors.New("contract already exists")
 	}
 	id, err := m.getNextContractID(d)
@@ -300,7 +314,6 @@ func (m *Management) Deploy(d *dao.Simple, sender util.Uint160, neff *nef.File,
 	if err != nil {
 		return nil, err
 	}
-	m.markUpdated(newcontract.Hash)
 	return newcontract, nil
 }
 
@@ -340,7 +353,6 @@ func (m *Management) Update(d *dao.Simple, hash util.Uint160, neff *nef.File, ma
 	contract = *oldcontract // Make a copy, don't ruin (potentially) cached contract.
 	// if NEF was provided, update the contract script
 	if neff != nil {
-		m.markUpdated(hash)
 		contract.NEF = *neff
 	}
 	// if manifest was provided, update the contract manifest
@@ -352,7 +364,6 @@ func (m *Management) Update(d *dao.Simple, hash util.Uint160, neff *nef.File, ma
 		if err != nil {
 			return nil, fmt.Errorf("invalid manifest: %w", err)
 		}
-		m.markUpdated(hash)
 		contract.Manifest = *manif
 	}
 	err = checkScriptAndMethods(contract.NEF.Script, contract.Manifest.ABI.Methods)
@@ -393,7 +404,7 @@ func (m *Management) Destroy(d *dao.Simple, hash util.Uint160) error {
 		d.DeleteStorageItem(contract.ID, k)
 		return true
 	})
-	m.markUpdated(hash)
+	m.markUpdated(d, hash, nil)
 	return nil
 }
 
@@ -444,18 +455,19 @@ func (m *Management) Metadata() *interop.ContractMD {
 
 // updateContractCache saves contract in the common and NEP-related caches. It's
 // an internal method that must be called with m.mtx lock taken.
-func (m *Management) updateContractCache(cs *state.Contract) {
+func updateContractCache(cache *ManagementCache, cs *state.Contract) {
-	m.contracts[cs.Hash] = cs
+	cache.contracts[cs.Hash] = cs
 	if cs.Manifest.IsStandardSupported(manifest.NEP11StandardName) {
-		m.nep11[cs.Hash] = struct{}{}
+		cache.nep11[cs.Hash] = struct{}{}
 	}
 	if cs.Manifest.IsStandardSupported(manifest.NEP17StandardName) {
-		m.nep17[cs.Hash] = struct{}{}
+		cache.nep17[cs.Hash] = struct{}{}
 	}
 }
 
 // OnPersist implements Contract interface.
 func (m *Management) OnPersist(ic *interop.Context) error {
+	var cache *ManagementCache
 	for _, native := range ic.Natives {
 		md := native.Metadata()
 		history := md.UpdateHistory
@@ -466,16 +478,17 @@ func (m *Management) OnPersist(ic *interop.Context) error {
 		cs := &state.Contract{
 			ContractBase: md.ContractBase,
 		}
-		err := m.PutContractState(ic.DAO, cs)
-		if err != nil {
-			return err
-		}
 		if err := native.Initialize(ic); err != nil {
 			return fmt.Errorf("initializing %s native contract: %w", md.Name, err)
 		}
-		m.mtx.Lock()
+		err := m.putContractState(ic.DAO, cs, false) // Perform cache update manually.
-		m.updateContractCache(cs)
+		if err != nil {
-		m.mtx.Unlock()
+			return err
+		}
+		if cache == nil {
+			cache = ic.DAO.GetRWCache(m.ID).(*ManagementCache)
+		}
+		updateContractCache(cache, cs)
 	}
 
 	return nil
@@ -485,8 +498,11 @@ func (m *Management) OnPersist(ic *interop.Context) error {
 // Cache initialisation should be done apart from Initialize because Initialize is
 // called only when deploying native contracts.
 func (m *Management) InitializeCache(d *dao.Simple) error {
-	m.mtx.Lock()
+	cache := &ManagementCache{
-	defer m.mtx.Unlock()
+		contracts: make(map[util.Uint160]*state.Contract),
+		nep11:     make(map[util.Uint160]struct{}),
+		nep17:     make(map[util.Uint160]struct{}),
+	}
 
 	var initErr error
 	d.Seek(m.ID, storage.SeekRange{Prefix: []byte{prefixContract}}, func(_, v []byte) bool {
@@ -495,56 +511,42 @@ func (m *Management) InitializeCache(d *dao.Simple) error {
 		if initErr != nil {
 			return false
 		}
-		m.updateContractCache(cs)
+		updateContractCache(cache, cs)
 		return true
 	})
-	return initErr
+	if initErr != nil {
+		return initErr
+	}
+	d.SetCache(m.ID, cache)
+	return nil
 }
 
 // PostPersist implements Contract interface.
 func (m *Management) PostPersist(ic *interop.Context) error {
-	m.mtx.Lock()
-	for h, cs := range m.contracts {
-		if cs != nil {
-			continue
-		}
-		delete(m.nep11, h)
-		delete(m.nep17, h)
-		newCs, err := m.getContractFromDAO(ic.DAO, h)
-		if err != nil {
-			// Contract was destroyed.
-			delete(m.contracts, h)
-			continue
-		}
-		m.updateContractCache(newCs)
-	}
-	m.mtx.Unlock()
 	return nil
 }
 
 // GetNEP11Contracts returns hashes of all deployed contracts that support NEP-11 standard. The list
 // is updated every PostPersist, so until PostPersist is called, the result for the previous block
 // is returned.
-func (m *Management) GetNEP11Contracts() []util.Uint160 {
+func (m *Management) GetNEP11Contracts(d *dao.Simple) []util.Uint160 {
-	m.mtx.RLock()
+	cache := d.GetROCache(m.ID).(*ManagementCache)
-	result := make([]util.Uint160, 0, len(m.nep11))
+	result := make([]util.Uint160, 0, len(cache.nep11))
-	for h := range m.nep11 {
+	for h := range cache.nep11 {
 		result = append(result, h)
 	}
-	m.mtx.RUnlock()
 	return result
 }
 
 // GetNEP17Contracts returns hashes of all deployed contracts that support NEP-17 standard. The list
 // is updated every PostPersist, so until PostPersist is called, the result for the previous block
 // is returned.
-func (m *Management) GetNEP17Contracts() []util.Uint160 {
+func (m *Management) GetNEP17Contracts(d *dao.Simple) []util.Uint160 {
-	m.mtx.RLock()
+	cache := d.GetROCache(m.ID).(*ManagementCache)
-	result := make([]util.Uint160, 0, len(m.nep17))
+	result := make([]util.Uint160, 0, len(cache.nep17))
-	for h := range m.nep17 {
+	for h := range cache.nep17 {
 		result = append(result, h)
 	}
-	m.mtx.RUnlock()
 	return result
 }
 
@@ -552,16 +554,30 @@ func (m *Management) GetNEP17Contracts() []util.Uint160 {
 func (m *Management) Initialize(ic *interop.Context) error {
 	setIntWithKey(m.ID, ic.DAO, keyMinimumDeploymentFee, defaultMinimumDeploymentFee)
 	setIntWithKey(m.ID, ic.DAO, keyNextAvailableID, 1)
+
+	cache := &ManagementCache{
+		contracts: make(map[util.Uint160]*state.Contract),
+		nep11:     make(map[util.Uint160]struct{}),
+		nep17:     make(map[util.Uint160]struct{}),
+	}
+	ic.DAO.SetCache(m.ID, cache)
 	return nil
 }
 
 // PutContractState saves given contract state into given DAO.
 func (m *Management) PutContractState(d *dao.Simple, cs *state.Contract) error {
+	return m.putContractState(d, cs, true)
+}
+
+// putContractState is an internal PutContractState representation.
+func (m *Management) putContractState(d *dao.Simple, cs *state.Contract, updateCache bool) error {
 	key := MakeContractKey(cs.Hash)
 	if err := putConvertibleToDAO(m.ID, d, key, cs); err != nil {
 		return err
 	}
-	m.markUpdated(cs.Hash)
+	if updateCache {
+		m.markUpdated(d, cs.Hash, cs)
+	}
 	if cs.UpdateCounter != 0 { // Update.
 		return nil
 	}

pkg/core/native/management_test.go

@@ -89,8 +89,11 @@ func TestManagement_GetNEP17Contracts(t *testing.T) {
 	d := dao.NewSimple(storage.NewMemoryStore(), false, false)
 	err := mgmt.Initialize(&interop.Context{DAO: d})
 	require.NoError(t, err)
+	err = mgmt.InitializeCache(d)
+	require.NoError(t, err)
 
-	require.Empty(t, mgmt.GetNEP17Contracts())
+	require.Empty(t, mgmt.GetNEP17Contracts(d))
+	private := d.GetPrivate()
 
 	// Deploy NEP-17 contract
 	script := []byte{byte(opcode.RET)}
@@ -104,29 +107,46 @@ func TestManagement_GetNEP17Contracts(t *testing.T) {
 		Parameters: []manifest.Parameter{},
 	})
 	manif.SupportedStandards = []string{manifest.NEP17StandardName}
-	c1, err := mgmt.Deploy(d, sender, ne, manif)
+	c1, err := mgmt.Deploy(private, sender, ne, manif)
 	require.NoError(t, err)
 
-	// PostPersist is not yet called, thus no NEP-17 contracts are expected
+	// c1 contract hash should be returned, as private DAO already contains changed cache.
-	require.Empty(t, mgmt.GetNEP17Contracts())
+	require.Equal(t, []util.Uint160{c1.Hash}, mgmt.GetNEP17Contracts(private))
 
-	// Call PostPersist, check c1 contract hash is returned
+	// Lower DAO still shouldn't contain c1, as no Persist was called.
-	require.NoError(t, mgmt.PostPersist(&interop.Context{DAO: d}))
+	require.Empty(t, mgmt.GetNEP17Contracts(d))
-	require.Equal(t, []util.Uint160{c1.Hash}, mgmt.GetNEP17Contracts())
+
+	// Call Persist, check c1 contract hash is returned
+	_, err = private.Persist()
+	require.NoError(t, err)
+	require.Equal(t, []util.Uint160{c1.Hash}, mgmt.GetNEP17Contracts(d))
 
 	// Update contract
+	private = d.GetPrivate()
 	manif.ABI.Methods = append(manif.ABI.Methods, manifest.Method{
 		Name:       "dummy2",
 		ReturnType: smartcontract.VoidType,
 		Parameters: []manifest.Parameter{},
 	})
-	c2, err := mgmt.Update(d, c1.Hash, ne, manif)
+	c1Updated, err := mgmt.Update(private, c1.Hash, ne, manif)
 	require.NoError(t, err)
+	require.Equal(t, c1.Hash, c1Updated.Hash)
 
-	// No changes expected before PostPersist call.
+	// No changes expected in lower store.
-	require.Equal(t, []util.Uint160{c1.Hash}, mgmt.GetNEP17Contracts())
+	require.Equal(t, []util.Uint160{c1.Hash}, mgmt.GetNEP17Contracts(d))
+	c1Lower, err := mgmt.GetContract(d, c1.Hash)
+	require.NoError(t, err)
+	require.Equal(t, 1, len(c1Lower.Manifest.ABI.Methods))
+	require.Equal(t, []util.Uint160{c1Updated.Hash}, mgmt.GetNEP17Contracts(private))
+	c1Upper, err := mgmt.GetContract(private, c1Updated.Hash)
+	require.NoError(t, err)
+	require.Equal(t, 2, len(c1Upper.Manifest.ABI.Methods))
 
-	// Call PostPersist, check c2 contract hash is returned
+	// Call Persist, check c1Updated state is returned from lower.
-	require.NoError(t, mgmt.PostPersist(&interop.Context{DAO: d}))
+	_, err = private.Persist()
-	require.Equal(t, []util.Uint160{c2.Hash}, mgmt.GetNEP17Contracts())
+	require.NoError(t, err)
+	require.Equal(t, []util.Uint160{c1.Hash}, mgmt.GetNEP17Contracts(d))
+	c1Lower, err = mgmt.GetContract(d, c1.Hash)
+	require.NoError(t, err)
+	require.Equal(t, 2, len(c1Lower.Manifest.ABI.Methods))
 }

pkg/core/native/native_gas.go

@@ -108,7 +108,7 @@ func (g *GAS) OnPersist(ic *interop.Context) error {
 		absAmount := big.NewInt(tx.SystemFee + tx.NetworkFee)
 		g.burn(ic, tx.Sender(), absAmount)
 	}
-	validators := g.NEO.GetNextBlockValidatorsInternal()
+	validators := g.NEO.GetNextBlockValidatorsInternal(ic.DAO)
 	primary := validators[ic.Block.PrimaryIndex].GetScriptHash()
 	var netFee int64
 	for _, tx := range ic.Block.Transactions {

pkg/core/native/native_neo.go

@@ -8,7 +8,6 @@ import (
 	"math/big"
 	"sort"
 	"strings"
-	"sync/atomic"
 
 	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
@@ -35,33 +34,33 @@ type NEO struct {
 	GAS    *GAS
 	Policy *Policy
 
-	// gasPerBlock represents current value of generated gas per block.
+	// Configuration and standby keys are set in constructor and then
-	// It is append-only and doesn't need to be copied when used.
+	// only read from.
-	gasPerBlock        atomic.Value
+	cfg         config.ProtocolConfiguration
-	gasPerBlockChanged atomic.Value
+	standbyKeys keys.PublicKeys
+}
 
-	registerPrice        atomic.Value
+type NeoCache struct {
-	registerPriceChanged atomic.Value
+	// gasPerBlock represents the history of generated gas per block.
+	gasPerBlock gasRecord
 
-	votesChanged   atomic.Value
+	registerPrice int64
-	nextValidators atomic.Value
+
-	validators     atomic.Value
+	votesChanged   bool
+	nextValidators keys.PublicKeys
+	validators     keys.PublicKeys
 	// committee contains cached committee members and their votes.
 	// It is updated once in a while depending on committee size
 	// (every 28 blocks for mainnet). It's value
 	// is always equal to value stored by `prefixCommittee`.
-	committee atomic.Value
+	committee keysWithVotes
 	// committeeHash contains script hash of the committee.
-	committeeHash atomic.Value
+	committeeHash util.Uint160
 
 	// gasPerVoteCache contains last updated value of GAS per vote reward for candidates.
 	// It is set in state-modifying methods only and read in `PostPersist` thus is not protected
 	// by any mutex.
 	gasPerVoteCache map[string]big.Int
-	// Configuration and standby keys are set during initialization and then
-	// only read from.
-	cfg         config.ProtocolConfiguration
-	standbyKeys keys.PublicKeys
 }
 
 const (
@@ -105,6 +104,41 @@ var (
 	big100                   = big.NewInt(100)
 )
 
+var (
+	_ interop.Contract        = (*NEO)(nil)
+	_ dao.NativeContractCache = (*NeoCache)(nil)
+)
+
+// Copy implements NativeContractCache interface.
+func (c *NeoCache) Copy() dao.NativeContractCache {
+	cp := &NeoCache{}
+	copyNeoCache(c, cp)
+	return cp
+}
+
+func copyNeoCache(src, dst *NeoCache) {
+	dst.votesChanged = src.votesChanged
+	// Can safely omit copying because the new array is created each time
+	// validators list, nextValidators and committee are updated.
+	dst.nextValidators = src.nextValidators
+	dst.validators = src.validators
+	dst.committee = src.committee
+	dst.committeeHash = src.committeeHash
+
+	dst.registerPrice = src.registerPrice
+
+	// Can't omit copying because gasPerBlock is append-only, thus to be able to
+	// discard cache changes in case of FAULTed transaction we need a separate
+	// container for updated gasPerBlock values.
+	dst.gasPerBlock = make(gasRecord, len(src.gasPerBlock))
+	copy(dst.gasPerBlock, src.gasPerBlock)
+
+	dst.gasPerVoteCache = make(map[string]big.Int)
+	for k, v := range src.gasPerVoteCache {
+		dst.gasPerVoteCache[k] = v
+	}
+}
+
 // makeValidatorKey creates a key from account script hash.
 func makeValidatorKey(key *keys.PublicKey) []byte {
 	b := key.Bytes()
@@ -116,7 +150,7 @@ func makeValidatorKey(key *keys.PublicKey) []byte {
 }
 
 // newNEO returns NEO native contract.
-func newNEO() *NEO {
+func newNEO(cfg config.ProtocolConfiguration) *NEO {
 	n := &NEO{}
 	defer n.UpdateHash()
 
@@ -128,13 +162,11 @@ func newNEO() *NEO {
 	nep17.balFromBytes = n.balanceFromBytes
 
 	n.nep17TokenNative = *nep17
-	n.votesChanged.Store(true)
+
-	n.nextValidators.Store(keys.PublicKeys(nil))
+	err := n.initConfigCache(cfg)
-	n.validators.Store(keys.PublicKeys(nil))
+	if err != nil {
-	n.committee.Store(keysWithVotes(nil))
+		panic(fmt.Errorf("failed to initialize NEO config cache: %w", err))
-	n.committeeHash.Store(util.Uint160{})
+	}
-	n.registerPriceChanged.Store(true)
-	n.gasPerVoteCache = make(map[string]big.Int)
 
 	desc := newDescriptor("unclaimedGas", smartcontract.IntegerType,
 		manifest.NewParameter("account", smartcontract.Hash160Type),
@@ -198,10 +230,6 @@ func newNEO() *NEO {
 
 // Initialize initializes NEO contract.
 func (n *NEO) Initialize(ic *interop.Context) error {
-	err := n.initConfigCache(ic.Chain)
-	if err != nil {
-		return nil
-	}
 	if err := n.nep17TokenNative.Initialize(ic); err != nil {
 		return err
 	}
@@ -211,9 +239,17 @@ func (n *NEO) Initialize(ic *interop.Context) error {
 		return errors.New("already initialized")
 	}
 
+	cache := &NeoCache{
+		gasPerVoteCache: make(map[string]big.Int),
+		votesChanged:    true,
+	}
+
+	// We need cache to be present in DAO before the subsequent call to `mint`.
+	ic.DAO.SetCache(n.ID, cache)
+
 	committee0 := n.standbyKeys[:n.cfg.GetCommitteeSize(ic.Block.Index)]
 	cvs := toKeysWithVotes(committee0)
-	err = n.updateCache(cvs, ic.Chain)
+	err := n.updateCache(cache, cvs, ic.BlockHeight())
 	if err != nil {
 		return err
 	}
@@ -231,80 +267,79 @@ func (n *NEO) Initialize(ic *interop.Context) error {
 	n.putGASRecord(ic.DAO, index, value)
 
 	gr := &gasRecord{{Index: index, GASPerBlock: *value}}
-	n.gasPerBlock.Store(*gr)
+	cache.gasPerBlock = *gr
-	n.gasPerBlockChanged.Store(false)
 	ic.DAO.PutStorageItem(n.ID, []byte{prefixVotersCount}, state.StorageItem{})
 
 	setIntWithKey(n.ID, ic.DAO, []byte{prefixRegisterPrice}, DefaultRegisterPrice)
-	n.registerPrice.Store(int64(DefaultRegisterPrice))
+	cache.registerPrice = int64(DefaultRegisterPrice)
-	n.registerPriceChanged.Store(false)
+
 	return nil
 }
 
 // InitializeCache initializes all NEO cache with the proper values from storage.
 // Cache initialisation should be done apart from Initialize because Initialize is
 // called only when deploying native contracts.
-func (n *NEO) InitializeCache(bc interop.Ledger, d *dao.Simple) error {
+func (n *NEO) InitializeCache(blockHeight uint32, d *dao.Simple) error {
-	err := n.initConfigCache(bc)
+	cache := &NeoCache{
-	if err != nil {
+		gasPerVoteCache: make(map[string]big.Int),
-		return nil
+		votesChanged:    true,
 	}
+
 	var committee = keysWithVotes{}
 	si := d.GetStorageItem(n.ID, prefixCommittee)
 	if err := committee.DecodeBytes(si); err != nil {
-		return err
+		return fmt.Errorf("failed to decode committee: %w", err)
 	}
-	if err := n.updateCache(committee, bc); err != nil {
+	if err := n.updateCache(cache, committee, blockHeight); err != nil {
-		return err
+		return fmt.Errorf("failed to update cache: %w", err)
 	}
 
-	n.gasPerBlock.Store(n.getSortedGASRecordFromDAO(d))
+	cache.gasPerBlock = n.getSortedGASRecordFromDAO(d)
-	n.gasPerBlockChanged.Store(false)
+	cache.registerPrice = getIntWithKey(n.ID, d, []byte{prefixRegisterPrice})
 
+	d.SetCache(n.ID, cache)
 	return nil
 }
 
-func (n *NEO) initConfigCache(bc interop.Ledger) error {
+func (n *NEO) initConfigCache(cfg config.ProtocolConfiguration) error {
 	var err error
 
-	n.cfg = bc.GetConfig()
+	n.cfg = cfg
 	n.standbyKeys, err = keys.NewPublicKeysFromStrings(n.cfg.StandbyCommittee)
 	return err
 }
 
-func (n *NEO) updateCache(cvs keysWithVotes, bc interop.Ledger) error {
+func (n *NEO) updateCache(cache *NeoCache, cvs keysWithVotes, blockHeight uint32) error {
-	n.committee.Store(cvs)
+	cache.committee = cvs
 
-	var committee = n.GetCommitteeMembers()
+	var committee = getCommitteeMembers(cache)
 	script, err := smartcontract.CreateMajorityMultiSigRedeemScript(committee.Copy())
 	if err != nil {
 		return err
 	}
-	n.committeeHash.Store(hash.Hash160(script))
+	cache.committeeHash = hash.Hash160(script)
 
-	nextVals := committee[:n.cfg.GetNumOfCNs(bc.BlockHeight()+1)].Copy()
+	nextVals := committee[:n.cfg.GetNumOfCNs(blockHeight+1)].Copy()
 	sort.Sort(nextVals)
-	n.nextValidators.Store(nextVals)
+	cache.nextValidators = nextVals
 	return nil
 }
 
-func (n *NEO) updateCommittee(ic *interop.Context) error {
+func (n *NEO) updateCommittee(cache *NeoCache, ic *interop.Context) error {
-	votesChanged := n.votesChanged.Load().(bool)
+	if !cache.votesChanged {
-	if !votesChanged {
 		// We need to put in storage anyway, as it affects dumps
-		committee := n.committee.Load().(keysWithVotes)
+		ic.DAO.PutStorageItem(n.ID, prefixCommittee, cache.committee.Bytes())
-		ic.DAO.PutStorageItem(n.ID, prefixCommittee, committee.Bytes())
 		return nil
 	}
 
-	_, cvs, err := n.computeCommitteeMembers(ic.Chain, ic.DAO)
+	_, cvs, err := n.computeCommitteeMembers(ic.BlockHeight(), ic.DAO)
 	if err != nil {
 		return err
 	}
-	if err := n.updateCache(cvs, ic.Chain); err != nil {
+	if err := n.updateCache(cache, cvs, ic.BlockHeight()); err != nil {
 		return err
 	}
-	n.votesChanged.Store(false)
+	cache.votesChanged = false
 	ic.DAO.PutStorageItem(n.ID, prefixCommittee, cvs.Bytes())
 	return nil
 }
@@ -312,13 +347,14 @@ func (n *NEO) updateCommittee(ic *interop.Context) error {
 // OnPersist implements Contract interface.
 func (n *NEO) OnPersist(ic *interop.Context) error {
 	if n.cfg.ShouldUpdateCommitteeAt(ic.Block.Index) {
-		oldKeys := n.nextValidators.Load().(keys.PublicKeys)
+		cache := ic.DAO.GetRWCache(n.ID).(*NeoCache)
-		oldCom := n.committee.Load().(keysWithVotes)
+		oldKeys := cache.nextValidators
+		oldCom := cache.committee
 		if n.cfg.GetNumOfCNs(ic.Block.Index) != len(oldKeys) ||
 			n.cfg.GetCommitteeSize(ic.Block.Index) != len(oldCom) {
-			n.votesChanged.Store(true)
+			cache.votesChanged = true
 		}
-		if err := n.updateCommittee(ic); err != nil {
+		if err := n.updateCommittee(cache, ic); err != nil {
 			return err
 		}
 	}
@@ -328,7 +364,8 @@ func (n *NEO) OnPersist(ic *interop.Context) error {
 // PostPersist implements Contract interface.
 func (n *NEO) PostPersist(ic *interop.Context) error {
 	gas := n.GetGASPerBlock(ic.DAO, ic.Block.Index)
-	pubs := n.GetCommitteeMembers()
+	cache := ic.DAO.GetROCache(n.ID).(*NeoCache)
+	pubs := getCommitteeMembers(cache)
 	committeeSize := n.cfg.GetCommitteeSize(ic.Block.Index)
 	index := int(ic.Block.Index) % committeeSize
 	committeeReward := new(big.Int).Mul(gas, bigCommitteeRewardRatio)
@@ -342,8 +379,11 @@ func (n *NEO) PostPersist(ic *interop.Context) error {
 		voterReward.Div(voterReward, big.NewInt(int64(committeeSize+validatorsCount)))
 		voterReward.Div(voterReward, big100)
 
-		var cs = n.committee.Load().(keysWithVotes)
+		var (
-		var key = make([]byte, 38)
+			cs        = cache.committee
+			isCacheRW bool
+			key       = make([]byte, 38)
+		)
 		for i := range cs {
 			if cs[i].Votes.Sign() > 0 {
 				var tmp = new(big.Int)
@@ -358,7 +398,7 @@ func (n *NEO) PostPersist(ic *interop.Context) error {
 				key = makeVoterKey([]byte(cs[i].Key), key)
 
 				var r *big.Int
-				if g, ok := n.gasPerVoteCache[cs[i].Key]; ok {
+				if g, ok := cache.gasPerVoteCache[cs[i].Key]; ok {
 					r = &g
 				} else {
 					reward := n.getGASPerVote(ic.DAO, key[:34], []uint32{ic.Block.Index + 1})
@@ -367,22 +407,16 @@ func (n *NEO) PostPersist(ic *interop.Context) error {
 				tmp.Add(tmp, r)
 
 				binary.BigEndian.PutUint32(key[34:], ic.Block.Index+1)
-				n.gasPerVoteCache[cs[i].Key] = *tmp
+				if !isCacheRW {
+					cache = ic.DAO.GetRWCache(n.ID).(*NeoCache)
+					isCacheRW = true
+				}
+				cache.gasPerVoteCache[cs[i].Key] = *tmp
 
 				ic.DAO.PutStorageItem(n.ID, key, bigint.ToBytes(tmp))
 			}
 		}
 	}
-	if n.gasPerBlockChanged.Load().(bool) {
-		n.gasPerBlock.Store(n.getSortedGASRecordFromDAO(ic.DAO))
-		n.gasPerBlockChanged.Store(false)
-	}
-
-	if n.registerPriceChanged.Load().(bool) {
-		p := getIntWithKey(n.ID, ic.DAO, []byte{prefixRegisterPrice})
-		n.registerPrice.Store(p)
-		n.registerPriceChanged.Store(false)
-	}
 	return nil
 }
 
@@ -504,28 +538,25 @@ func (n *NEO) getSortedGASRecordFromDAO(d *dao.Simple) gasRecord {
 
 // GetGASPerBlock returns gas generated for block with provided index.
 func (n *NEO) GetGASPerBlock(d *dao.Simple, index uint32) *big.Int {
-	var gr gasRecord
+	cache := d.GetROCache(n.ID).(*NeoCache)
-	if n.gasPerBlockChanged.Load().(bool) {
+	gr := cache.gasPerBlock
-		gr = n.getSortedGASRecordFromDAO(d)
-	} else {
-		gr = n.gasPerBlock.Load().(gasRecord)
-	}
 	for i := len(gr) - 1; i >= 0; i-- {
 		if gr[i].Index <= index {
 			g := gr[i].GASPerBlock
 			return &g
 		}
 	}
-	panic("contract not initialized")
+	panic("NEO cache not initialized")
 }
 
 // GetCommitteeAddress returns address of the committee.
-func (n *NEO) GetCommitteeAddress() util.Uint160 {
+func (n *NEO) GetCommitteeAddress(d *dao.Simple) util.Uint160 {
-	return n.committeeHash.Load().(util.Uint160)
+	cache := d.GetROCache(n.ID).(*NeoCache)
+	return cache.committeeHash
 }
 
 func (n *NEO) checkCommittee(ic *interop.Context) bool {
-	ok, err := runtime.CheckHashedWitness(ic, n.GetCommitteeAddress())
+	ok, err := runtime.CheckHashedWitness(ic, n.GetCommitteeAddress(ic.DAO))
 	if err != nil {
 		panic(err)
 	}
@@ -549,8 +580,12 @@ func (n *NEO) SetGASPerBlock(ic *interop.Context, index uint32, gas *big.Int) er
 	if !n.checkCommittee(ic) {
 		return errors.New("invalid committee signature")
 	}
-	n.gasPerBlockChanged.Store(true)
 	n.putGASRecord(ic.DAO, index, gas)
+	cache := ic.DAO.GetRWCache(n.ID).(*NeoCache)
+	cache.gasPerBlock = append(cache.gasPerBlock, gasIndexPair{
+		Index:       index,
+		GASPerBlock: *gas,
+	})
 	return nil
 }
 
@@ -559,10 +594,8 @@ func (n *NEO) getRegisterPrice(ic *interop.Context, _ []stackitem.Item) stackite
 }
 
 func (n *NEO) getRegisterPriceInternal(d *dao.Simple) int64 {
-	if !n.registerPriceChanged.Load().(bool) {
+	cache := d.GetROCache(n.ID).(*NeoCache)
-		return n.registerPrice.Load().(int64)
+	return cache.registerPrice
-	}
-	return getIntWithKey(n.ID, d, []byte{prefixRegisterPrice})
 }
 
 func (n *NEO) setRegisterPrice(ic *interop.Context, args []stackitem.Item) stackitem.Item {
@@ -575,13 +608,14 @@ func (n *NEO) setRegisterPrice(ic *interop.Context, args []stackitem.Item) stack
 	}
 
 	setIntWithKey(n.ID, ic.DAO, []byte{prefixRegisterPrice}, price.Int64())
-	n.registerPriceChanged.Store(true)
+	cache := ic.DAO.GetRWCache(n.ID).(*NeoCache)
+	cache.registerPrice = price.Int64()
 	return stackitem.Null{}
 }
 
-func (n *NEO) dropCandidateIfZero(d *dao.Simple, pub *keys.PublicKey, c *candidate) (bool, error) {
+func (n *NEO) dropCandidateIfZero(d *dao.Simple, cache *NeoCache, pub *keys.PublicKey, c *candidate) bool {
 	if c.Registered || c.Votes.Sign() != 0 {
-		return false, nil
+		return false
 	}
 	d.DeleteStorageItem(n.ID, makeValidatorKey(pub))
 
@@ -590,9 +624,9 @@ func (n *NEO) dropCandidateIfZero(d *dao.Simple, pub *keys.PublicKey, c *candida
 		d.DeleteStorageItem(n.ID, append(voterKey, k...)) // d.Seek cuts prefix, thus need to append it again.
 		return true
 	})
-	delete(n.gasPerVoteCache, string(voterKey))
+	delete(cache.gasPerVoteCache, string(voterKey))
 
-	return true, nil
+	return true
 }
 
 func makeVoterKey(pub []byte, prealloc ...[]byte) []byte {
@@ -644,12 +678,8 @@ func (n *NEO) CalculateNEOHolderReward(d *dao.Simple, value *big.Int, start, end
 	} else if value.Sign() < 0 {
 		return nil, errors.New("negative value")
 	}
-	var gr gasRecord
+	cache := d.GetROCache(n.ID).(*NeoCache)
-	if !n.gasPerBlockChanged.Load().(bool) {
+	gr := cache.gasPerBlock
-		gr = n.gasPerBlock.Load().(gasRecord)
-	} else {
-		gr = n.getSortedGASRecordFromDAO(d)
-	}
 	var sum, tmp big.Int
 	for i := len(gr) - 1; i >= 0; i-- {
 		if gr[i].Index >= end {
@@ -719,12 +749,13 @@ func (n *NEO) UnregisterCandidateInternal(ic *interop.Context, pub *keys.PublicK
 	if si == nil {
 		return nil
 	}
-	n.validators.Store(keys.PublicKeys(nil))
+	cache := ic.DAO.GetRWCache(n.ID).(*NeoCache)
+	cache.validators = nil
 	c := new(candidate).FromBytes(si)
 	c.Registered = false
-	ok, err := n.dropCandidateIfZero(ic.DAO, pub, c)
+	ok := n.dropCandidateIfZero(ic.DAO, cache, pub, c)
 	if ok {
-		return err
+		return nil
 	}
 	return putConvertibleToDAO(n.ID, ic.DAO, key, c)
 }
@@ -798,7 +829,8 @@ func (n *NEO) VoteInternal(ic *interop.Context, h util.Uint160, pub *keys.Public
 // ModifyAccountVotes modifies votes of the specified account by value (can be negative).
 // typ specifies if this modify is occurring during transfer or vote (with old or new validator).
 func (n *NEO) ModifyAccountVotes(acc *state.NEOBalance, d *dao.Simple, value *big.Int, isNewVote bool) error {
-	n.votesChanged.Store(true)
+	cache := d.GetRWCache(n.ID).(*NeoCache)
+	cache.votesChanged = true
 	if acc.VoteTo != nil {
 		key := makeValidatorKey(acc.VoteTo)
 		si := d.GetStorageItem(n.ID, key)
@@ -808,12 +840,12 @@ func (n *NEO) ModifyAccountVotes(acc *state.NEOBalance, d *dao.Simple, value *bi
 		cd := new(candidate).FromBytes(si)
 		cd.Votes.Add(&cd.Votes, value)
 		if !isNewVote {
-			ok, err := n.dropCandidateIfZero(d, acc.VoteTo, cd)
+			ok := n.dropCandidateIfZero(d, cache, acc.VoteTo, cd)
 			if ok {
-				return err
+				return nil
 			}
 		}
-		n.validators.Store(keys.PublicKeys(nil))
+		cache.validators = nil
 		return putConvertibleToDAO(n.ID, d, key, cd)
 	}
 	return nil
@@ -825,7 +857,7 @@ func (n *NEO) getCandidates(d *dao.Simple, sortByKey bool) ([]keyWithVotes, erro
 	d.Seek(n.ID, storage.SeekRange{Prefix: []byte{prefixCandidate}}, func(k, v []byte) bool {
 		c := new(candidate).FromBytes(v)
 		emit.CheckSig(buf.BinWriter, k)
-		if c.Registered && !n.Policy.IsBlockedInternal(d, hash.Hash160(buf.Bytes())) {
+		if c.Registered && !n.Policy.IsBlocked(d, hash.Hash160(buf.Bytes())) {
 			arr = append(arr, keyWithVotes{Key: string(k), Votes: &c.Votes})
 		}
 		buf.Reset()
@@ -906,23 +938,27 @@ func (n *NEO) getAccountState(ic *interop.Context, args []stackitem.Item) stacki
 }
 
 // ComputeNextBlockValidators returns an actual list of current validators.
-func (n *NEO) ComputeNextBlockValidators(bc interop.Ledger, d *dao.Simple) (keys.PublicKeys, error) {
+func (n *NEO) ComputeNextBlockValidators(blockHeight uint32, d *dao.Simple) (keys.PublicKeys, error) {
-	numOfCNs := n.cfg.GetNumOfCNs(bc.BlockHeight() + 1)
+	numOfCNs := n.cfg.GetNumOfCNs(blockHeight + 1)
-	if vals := n.validators.Load().(keys.PublicKeys); vals != nil && numOfCNs == len(vals) {
+	// Most of the time it should be OK with RO cache, thus try to retrieve
+	// validators without RW cache creation to avoid cached values copying.
+	cache := d.GetROCache(n.ID).(*NeoCache)
+	if vals := cache.validators; vals != nil && numOfCNs == len(vals) {
 		return vals.Copy(), nil
 	}
-	result, _, err := n.computeCommitteeMembers(bc, d)
+	cache = d.GetRWCache(n.ID).(*NeoCache)
+	result, _, err := n.computeCommitteeMembers(blockHeight, d)
 	if err != nil {
 		return nil, err
 	}
 	result = result[:numOfCNs]
 	sort.Sort(result)
-	n.validators.Store(result)
+	cache.validators = result
 	return result, nil
 }
 
 func (n *NEO) getCommittee(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
-	pubs := n.GetCommitteeMembers()
+	pubs := n.GetCommitteeMembers(ic.DAO)
 	sort.Sort(pubs)
 	return pubsToArray(pubs)
 }
@@ -941,8 +977,13 @@ func (n *NEO) modifyVoterTurnout(d *dao.Simple, amount *big.Int) error {
 }
 
 // GetCommitteeMembers returns public keys of nodes in committee using cached value.
-func (n *NEO) GetCommitteeMembers() keys.PublicKeys {
+func (n *NEO) GetCommitteeMembers(d *dao.Simple) keys.PublicKeys {
-	var cvs = n.committee.Load().(keysWithVotes)
+	cache := d.GetROCache(n.ID).(*NeoCache)
+	return getCommitteeMembers(cache)
+}
+
+func getCommitteeMembers(cache *NeoCache) keys.PublicKeys {
+	var cvs = cache.committee
 	var committee = make(keys.PublicKeys, len(cvs))
 	var err error
 	for i := range committee {
@@ -965,7 +1006,7 @@ func toKeysWithVotes(pubs keys.PublicKeys) keysWithVotes {
 }
 
 // computeCommitteeMembers returns public keys of nodes in committee.
-func (n *NEO) computeCommitteeMembers(bc interop.Ledger, d *dao.Simple) (keys.PublicKeys, keysWithVotes, error) {
+func (n *NEO) computeCommitteeMembers(blockHeight uint32, d *dao.Simple) (keys.PublicKeys, keysWithVotes, error) {
 	key := []byte{prefixVotersCount}
 	si := d.GetStorageItem(n.ID, key)
 	if si == nil {
@@ -977,7 +1018,7 @@ func (n *NEO) computeCommitteeMembers(bc interop.Ledger, d *dao.Simple) (keys.Pu
 	_, totalSupply := n.getTotalSupply(d)
 	voterTurnout := votersCount.Div(votersCount, totalSupply)
 
-	count := n.cfg.GetCommitteeSize(bc.BlockHeight() + 1)
+	count := n.cfg.GetCommitteeSize(blockHeight + 1)
 	// Can be sorted and/or returned to outside users, thus needs to be copied.
 	sbVals := keys.PublicKeys(n.standbyKeys[:count]).Copy()
 	cs, err := n.getCandidates(d, false)
@@ -1011,13 +1052,14 @@ func (n *NEO) computeCommitteeMembers(bc interop.Ledger, d *dao.Simple) (keys.Pu
 }
 
 func (n *NEO) getNextBlockValidators(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
-	result := n.GetNextBlockValidatorsInternal()
+	result := n.GetNextBlockValidatorsInternal(ic.DAO)
 	return pubsToArray(result)
 }
 
 // GetNextBlockValidatorsInternal returns next block validators.
-func (n *NEO) GetNextBlockValidatorsInternal() keys.PublicKeys {
+func (n *NEO) GetNextBlockValidatorsInternal(d *dao.Simple) keys.PublicKeys {
-	return n.nextValidators.Load().(keys.PublicKeys).Copy()
+	cache := d.GetROCache(n.ID).(*NeoCache)
+	return cache.nextValidators.Copy()
 }
 
 // BalanceOf returns native NEO token balance for the acc.

pkg/core/native/native_test/common_test.go

@@ -8,9 +8,12 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-
+	"github.com/nspcc-dev/neo-go/pkg/io"
 	"github.com/nspcc-dev/neo-go/pkg/neotest"
 	"github.com/nspcc-dev/neo-go/pkg/neotest/chain"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
+	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
+	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"github.com/stretchr/testify/require"
 )
@@ -77,6 +80,38 @@ func testGetSet(t *testing.T, c *neotest.ContractInvoker, name string, defaultVa
 	})
 }
 
+func testGetSetCache(t *testing.T, c *neotest.ContractInvoker, name string, defaultValue int64) {
+	getName := "get" + name
+	setName := "set" + name
+
+	committeeInvoker := c.WithSigners(c.Committee)
+
+	newVal := defaultValue - 1
+
+	// Change fee, abort the transaction and check that contract cache wasn't persisted
+	// for FAULTed tx at the same block.
+	w := io.NewBufBinWriter()
+	emit.AppCall(w.BinWriter, committeeInvoker.Hash, setName, callflag.All, newVal)
+	emit.Opcodes(w.BinWriter, opcode.ABORT)
+	tx1 := committeeInvoker.PrepareInvocation(t, w.Bytes(), committeeInvoker.Signers)
+	tx2 := committeeInvoker.PrepareInvoke(t, getName)
+	committeeInvoker.AddNewBlock(t, tx1, tx2)
+	committeeInvoker.CheckFault(t, tx1.Hash(), "ABORT")
+	committeeInvoker.CheckHalt(t, tx2.Hash(), stackitem.Make(defaultValue))
+
+	// Change fee and check that change is available for the next tx.
+	tx1 = committeeInvoker.PrepareInvoke(t, setName, newVal)
+	tx2 = committeeInvoker.PrepareInvoke(t, getName)
+	committeeInvoker.AddNewBlock(t, tx1, tx2)
+	committeeInvoker.CheckHalt(t, tx1.Hash())
+	if name != "GasPerBlock" {
+		committeeInvoker.CheckHalt(t, tx2.Hash(), stackitem.Make(newVal))
+	} else {
+		committeeInvoker.CheckHalt(t, tx2.Hash(), stackitem.Make(defaultValue))
+		committeeInvoker.Invoke(t, newVal, getName)
+	}
+}
+
 func setNodesByRole(t *testing.T, designateInvoker *neotest.ContractInvoker, ok bool, r noderoles.Role, nodes keys.PublicKeys) {
 	pubs := make([]interface{}, len(nodes))
 	for i := range nodes {

pkg/core/native/native_test/designate_test.go

@@ -5,8 +5,15 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
+	"github.com/nspcc-dev/neo-go/pkg/io"
 	"github.com/nspcc-dev/neo-go/pkg/neotest"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
+	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
+	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
+	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"github.com/stretchr/testify/require"
 )
 
@@ -45,3 +52,88 @@ func TestDesignate_DesignateAsRole(t *testing.T) {
 		checkNodeRoles(t, designateInvoker, true, noderoles.NeoFSAlphabet, e.Chain.BlockHeight()+1, pubs)
 	})
 }
+
+type dummyOracle struct {
+	updateNodes func(k keys.PublicKeys)
+}
+
+// AddRequests processes new requests.
+func (o *dummyOracle) AddRequests(map[uint64]*state.OracleRequest) {
+}
+
+// RemoveRequests removes already processed requests.
+func (o *dummyOracle) RemoveRequests([]uint64) {
+	panic("TODO")
+}
+
+// UpdateOracleNodes updates oracle nodes.
+func (o *dummyOracle) UpdateOracleNodes(k keys.PublicKeys) {
+	if o.updateNodes != nil {
+		o.updateNodes(k)
+		return
+	}
+	panic("TODO")
+}
+
+// UpdateNativeContract updates oracle contract native script and hash.
+func (o *dummyOracle) UpdateNativeContract([]byte, []byte, util.Uint160, int) {
+}
+
+// Start runs oracle module.
+func (o *dummyOracle) Start() {
+	panic("TODO")
+}
+
+// Shutdown shutdowns oracle module.
+func (o *dummyOracle) Shutdown() {
+	panic("TODO")
+}
+
+func TestDesignate_Cache(t *testing.T) {
+	c := newDesignateClient(t)
+	e := c.Executor
+	designateInvoker := c.WithSigners(c.Committee)
+	r := int64(noderoles.Oracle)
+	var (
+		updatedNodes keys.PublicKeys
+		updateCalled bool
+	)
+	oracleServ := &dummyOracle{
+		updateNodes: func(k keys.PublicKeys) {
+			updatedNodes = k
+			updateCalled = true
+		},
+	}
+	privGood, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+	pubsGood := []interface{}{privGood.PublicKey().Bytes()}
+
+	privBad, err := keys.NewPrivateKey()
+	require.NoError(t, err)
+	pubsBad := []interface{}{privBad.PublicKey().Bytes()}
+
+	// Firstly, designate good Oracle node and check that OracleService callback was called during PostPersist.
+	e.Chain.SetOracle(oracleServ)
+	txDesignateGood := designateInvoker.PrepareInvoke(t, "designateAsRole", r, pubsGood)
+	e.AddNewBlock(t, txDesignateGood)
+	e.CheckHalt(t, txDesignateGood.Hash(), stackitem.Null{})
+	require.True(t, updateCalled)
+	require.Equal(t, keys.PublicKeys{privGood.PublicKey()}, updatedNodes)
+	updatedNodes = nil
+	updateCalled = false
+
+	// Check designated node in a separate block.
+	checkNodeRoles(t, designateInvoker, true, noderoles.Oracle, e.Chain.BlockHeight()+1, keys.PublicKeys{privGood.PublicKey()})
+
+	// Designate privBad as oracle node and abort the transaction. Designation cache changes
+	// shouldn't be persisted to the contract and no notification should be sent.
+	w := io.NewBufBinWriter()
+	emit.AppCall(w.BinWriter, designateInvoker.Hash, "designateAsRole", callflag.All, int64(r), pubsBad)
+	emit.Opcodes(w.BinWriter, opcode.ABORT)
+	require.NoError(t, w.Err)
+	script := w.Bytes()
+
+	designateInvoker.InvokeScriptCheckFAULT(t, script, designateInvoker.Signers, "ABORT")
+	require.Nil(t, updatedNodes)
+	require.False(t, updateCalled)
+}

pkg/core/native/native_test/management_test.go

@@ -20,6 +20,8 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/nef"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
 	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
@@ -34,6 +36,43 @@ func TestManagement_MinimumDeploymentFee(t *testing.T) {
 	testGetSet(t, newManagementClient(t), "MinimumDeploymentFee", 10_00000000, 0, 0)
 }
 
+func TestManagement_MinimumDeploymentFeeCache(t *testing.T) {
+	c := newManagementClient(t)
+	testGetSetCache(t, c, "MinimumDeploymentFee", 10_00000000)
+}
+
+func TestManagement_ContractCache(t *testing.T) {
+	c := newManagementClient(t)
+	managementInvoker := c.WithSigners(c.Committee)
+
+	cs1, _ := contracts.GetTestContractState(t, pathToInternalContracts, 1, 2, c.Committee.ScriptHash())
+	manifestBytes, err := json.Marshal(cs1.Manifest)
+	require.NoError(t, err)
+	nefBytes, err := cs1.NEF.Bytes()
+	require.NoError(t, err)
+
+	// Deploy contract, abort the transaction and check that Management cache wasn't persisted
+	// for FAULTed tx at the same block.
+	w := io.NewBufBinWriter()
+	emit.AppCall(w.BinWriter, managementInvoker.Hash, "deploy", callflag.All, nefBytes, manifestBytes)
+	emit.Opcodes(w.BinWriter, opcode.ABORT)
+	tx1 := managementInvoker.PrepareInvocation(t, w.Bytes(), managementInvoker.Signers)
+	tx2 := managementInvoker.PrepareInvoke(t, "getContract", cs1.Hash.BytesBE())
+	managementInvoker.AddNewBlock(t, tx1, tx2)
+	managementInvoker.CheckFault(t, tx1.Hash(), "ABORT")
+	managementInvoker.CheckHalt(t, tx2.Hash(), stackitem.Null{})
+
+	// Deploy the contract and check that cache was persisted for HALTed transaction at the same block.
+	tx1 = managementInvoker.PrepareInvoke(t, "deploy", nefBytes, manifestBytes)
+	tx2 = managementInvoker.PrepareInvoke(t, "getContract", cs1.Hash.BytesBE())
+	managementInvoker.AddNewBlock(t, tx1, tx2)
+	managementInvoker.CheckHalt(t, tx1.Hash())
+	aer, err := managementInvoker.Chain.GetAppExecResults(tx2.Hash(), trigger.Application)
+	require.NoError(t, err)
+	require.Equal(t, vm.HaltState, aer[0].VMState, aer[0].FaultException)
+	require.NotEqual(t, stackitem.Null{}, aer[0].Stack)
+}
+
 func TestManagement_ContractDeploy(t *testing.T) {
 	c := newManagementClient(t)
 	managementInvoker := c.WithSigners(c.Committee)

pkg/core/native/native_test/neo_test.go

@@ -42,10 +42,18 @@ func TestNEO_GasPerBlock(t *testing.T) {
 	testGetSet(t, newNeoCommitteeClient(t, 100_0000_0000), "GasPerBlock", 5*native.GASFactor, 0, 10*native.GASFactor)
 }
 
+func TestNEO_GasPerBlockCache(t *testing.T) {
+	testGetSetCache(t, newNeoCommitteeClient(t, 100_0000_0000), "GasPerBlock", 5*native.GASFactor)
+}
+
 func TestNEO_RegisterPrice(t *testing.T) {
 	testGetSet(t, newNeoCommitteeClient(t, 100_0000_0000), "RegisterPrice", native.DefaultRegisterPrice, 1, math.MaxInt64)
 }
 
+func TestNEO_RegisterPriceCache(t *testing.T) {
+	testGetSetCache(t, newNeoCommitteeClient(t, 100_0000_0000), "RegisterPrice", native.DefaultRegisterPrice)
+}
+
 func TestNEO_Vote(t *testing.T) {
 	neoCommitteeInvoker := newNeoCommitteeClient(t, 100_0000_0000)
 	neoValidatorsInvoker := neoCommitteeInvoker.WithSigners(neoCommitteeInvoker.Validator)

pkg/core/native/native_test/notary_test.go

@@ -32,11 +32,21 @@ func TestNotary_MaxNotValidBeforeDelta(t *testing.T) {
 	testGetSet(t, c, "MaxNotValidBeforeDelta", 140, int64(c.Chain.GetConfig().ValidatorsCount), int64(c.Chain.GetConfig().MaxValidUntilBlockIncrement/2))
 }
 
+func TestNotary_MaxNotValidBeforeDeltaCache(t *testing.T) {
+	c := newNotaryClient(t)
+	testGetSetCache(t, c, "MaxNotValidBeforeDelta", 140)
+}
+
 func TestNotary_NotaryServiceFeePerKey(t *testing.T) {
 	c := newNotaryClient(t)
 	testGetSet(t, c, "NotaryServiceFeePerKey", 1000_0000, 0, 0)
 }
 
+func TestNotary_NotaryServiceFeePerKeyCache(t *testing.T) {
+	c := newNotaryClient(t)
+	testGetSetCache(t, c, "NotaryServiceFeePerKey", 1000_0000)
+}
+
 func TestNotary_Pipeline(t *testing.T) {
 	notaryCommitteeInvoker := newNotaryClient(t)
 	e := notaryCommitteeInvoker.Executor

pkg/core/native/native_test/oracle_test.go

@@ -28,10 +28,14 @@ func newOracleClient(t *testing.T) *neotest.ContractInvoker {
 	return newNativeClient(t, nativenames.Oracle)
 }
 
-func TestGetSetPrice(t *testing.T) {
+func TestOracle_GetSetPrice(t *testing.T) {
 	testGetSet(t, newOracleClient(t), "Price", native.DefaultOracleRequestPrice, 1, math.MaxInt64)
 }
 
+func TestOracle_GetSetPriceCache(t *testing.T) {
+	testGetSetCache(t, newOracleClient(t), "Price", native.DefaultOracleRequestPrice)
+}
+
 func putOracleRequest(t *testing.T, oracleInvoker *neotest.ContractInvoker,
 	url string, filter *string, cb string, userData []byte, gas int64, errStr ...string) {
 	var filtItem interface{}

pkg/core/native/native_test/policy_test.go

@@ -19,14 +19,26 @@ func TestPolicy_FeePerByte(t *testing.T) {
 	testGetSet(t, newPolicyClient(t), "FeePerByte", 1000, 0, 100_000_000)
 }
 
+func TestPolicy_FeePerByteCache(t *testing.T) {
+	testGetSetCache(t, newPolicyClient(t), "FeePerByte", 1000)
+}
+
 func TestPolicy_ExecFeeFactor(t *testing.T) {
 	testGetSet(t, newPolicyClient(t), "ExecFeeFactor", interop.DefaultBaseExecFee, 1, 1000)
 }
 
+func TestPolicy_ExecFeeFactorCache(t *testing.T) {
+	testGetSetCache(t, newPolicyClient(t), "ExecFeeFactor", interop.DefaultBaseExecFee)
+}
+
 func TestPolicy_StoragePrice(t *testing.T) {
 	testGetSet(t, newPolicyClient(t), "StoragePrice", native.DefaultStoragePrice, 1, 10000000)
 }
 
+func TestPolicy_StoragePriceCache(t *testing.T) {
+	testGetSetCache(t, newPolicyClient(t), "StoragePrice", native.DefaultStoragePrice)
+}
+
 func TestPolicy_BlockedAccounts(t *testing.T) {
 	c := newPolicyClient(t)
 	e := c.Executor

pkg/core/native/notary.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"math"
 	"math/big"
-	"sync"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
@@ -32,12 +31,9 @@ type Notary struct {
 	GAS   *GAS
 	NEO   *NEO
 	Desig *Designate
+}
 
-	lock sync.RWMutex
+type NotaryCache struct {
-	// isValid defies whether cached values were changed during the current
-	// consensus iteration. If false, these values will be updated after
-	// blockchain DAO persisting. If true, we can safely use cached values.
-	isValid                bool
 	maxNotValidBeforeDelta uint32
 	notaryServiceFeePerKey int64
 }
@@ -56,6 +52,22 @@ var (
 	notaryServiceFeeKey       = []byte{5}
 )
 
+var (
+	_ interop.Contract        = (*Notary)(nil)
+	_ dao.NativeContractCache = (*NotaryCache)(nil)
+)
+
+// Copy implements NativeContractCache interface.
+func (c *NotaryCache) Copy() dao.NativeContractCache {
+	cp := &NotaryCache{}
+	copyNotaryCache(c, cp)
+	return cp
+}
+
+func copyNotaryCache(src, dst *NotaryCache) {
+	*dst = *src
+}
+
 // newNotary returns Notary native contract.
 func newNotary() *Notary {
 	n := &Notary{ContractMD: *interop.NewContractMD(nativenames.Notary, notaryContractID)}
@@ -125,9 +137,22 @@ func (n *Notary) Metadata() *interop.ContractMD {
 func (n *Notary) Initialize(ic *interop.Context) error {
 	setIntWithKey(n.ID, ic.DAO, maxNotValidBeforeDeltaKey, defaultMaxNotValidBeforeDelta)
 	setIntWithKey(n.ID, ic.DAO, notaryServiceFeeKey, defaultNotaryServiceFeePerKey)
-	n.isValid = true
+
-	n.maxNotValidBeforeDelta = defaultMaxNotValidBeforeDelta
+	cache := &NotaryCache{
-	n.notaryServiceFeePerKey = defaultNotaryServiceFeePerKey
+		maxNotValidBeforeDelta: defaultMaxNotValidBeforeDelta,
+		notaryServiceFeePerKey: defaultNotaryServiceFeePerKey,
+	}
+	ic.DAO.SetCache(n.ID, cache)
+	return nil
+}
+
+func (n *Notary) InitializeCache(d *dao.Simple) error {
+	cache := &NotaryCache{
+		maxNotValidBeforeDelta: uint32(getIntWithKey(n.ID, d, maxNotValidBeforeDeltaKey)),
+		notaryServiceFeePerKey: getIntWithKey(n.ID, d, notaryServiceFeeKey),
+	}
+
+	d.SetCache(n.ID, cache)
 	return nil
 }
 
@@ -176,15 +201,6 @@ func (n *Notary) OnPersist(ic *interop.Context) error {
 
 // PostPersist implements Contract interface.
 func (n *Notary) PostPersist(ic *interop.Context) error {
-	n.lock.Lock()
-	defer n.lock.Unlock()
-	if n.isValid {
-		return nil
-	}
-
-	n.maxNotValidBeforeDelta = uint32(getIntWithKey(n.ID, ic.DAO, maxNotValidBeforeDeltaKey))
-	n.notaryServiceFeePerKey = getIntWithKey(n.ID, ic.DAO, notaryServiceFeeKey)
-	n.isValid = true
 	return nil
 }
 
@@ -207,7 +223,7 @@ func (n *Notary) onPayment(ic *interop.Context, args []stackitem.Item) stackitem
 	}
 
 	allowedChangeTill := ic.Tx.Sender() == to
-	currentHeight := ic.Chain.BlockHeight()
+	currentHeight := ic.BlockHeight()
 	deposit := n.GetDepositFor(ic.DAO, to)
 	till := toUint32(additionalParams[1])
 	if till < currentHeight {
@@ -250,7 +266,7 @@ func (n *Notary) lockDepositUntil(ic *interop.Context, args []stackitem.Item) st
 		return stackitem.NewBool(false)
 	}
 	till := toUint32(args[1])
-	if till < ic.Chain.BlockHeight() {
+	if till < ic.BlockHeight() {
 		return stackitem.NewBool(false)
 	}
 	deposit := n.GetDepositFor(ic.DAO, addr)
@@ -286,7 +302,7 @@ func (n *Notary) withdraw(ic *interop.Context, args []stackitem.Item) stackitem.
 	if deposit == nil {
 		return stackitem.NewBool(false)
 	}
-	if ic.Chain.BlockHeight() < deposit.Till {
+	if ic.BlockHeight() < deposit.Till {
 		return stackitem.NewBool(false)
 	}
 	cs, err := ic.GetContract(n.GAS.Hash)
@@ -391,12 +407,8 @@ func (n *Notary) getMaxNotValidBeforeDelta(ic *interop.Context, _ []stackitem.It
 
 // GetMaxNotValidBeforeDelta is an internal representation of Notary getMaxNotValidBeforeDelta method.
 func (n *Notary) GetMaxNotValidBeforeDelta(dao *dao.Simple) uint32 {
-	n.lock.RLock()
+	cache := dao.GetROCache(n.ID).(*NotaryCache)
-	defer n.lock.RUnlock()
+	return cache.maxNotValidBeforeDelta
-	if n.isValid {
-		return n.maxNotValidBeforeDelta
-	}
-	return uint32(getIntWithKey(n.ID, dao, maxNotValidBeforeDeltaKey))
 }
 
 // setMaxNotValidBeforeDelta is Notary contract method and sets the maximum NotValidBefore delta.
@@ -404,16 +416,15 @@ func (n *Notary) setMaxNotValidBeforeDelta(ic *interop.Context, args []stackitem
 	value := toUint32(args[0])
 	cfg := ic.Chain.GetConfig()
 	maxInc := cfg.MaxValidUntilBlockIncrement
-	if value > maxInc/2 || value < uint32(cfg.GetNumOfCNs(ic.Chain.BlockHeight())) {
+	if value > maxInc/2 || value < uint32(cfg.GetNumOfCNs(ic.BlockHeight())) {
-		panic(fmt.Errorf("MaxNotValidBeforeDelta cannot be more than %d or less than %d", maxInc/2, cfg.GetNumOfCNs(ic.Chain.BlockHeight())))
+		panic(fmt.Errorf("MaxNotValidBeforeDelta cannot be more than %d or less than %d", maxInc/2, cfg.GetNumOfCNs(ic.BlockHeight())))
 	}
 	if !n.NEO.checkCommittee(ic) {
 		panic("invalid committee signature")
 	}
-	n.lock.Lock()
-	defer n.lock.Unlock()
 	setIntWithKey(n.ID, ic.DAO, maxNotValidBeforeDeltaKey, int64(value))
-	n.isValid = false
+	cache := ic.DAO.GetRWCache(n.ID).(*NotaryCache)
+	cache.maxNotValidBeforeDelta = value
 	return stackitem.Null{}
 }
 
@@ -424,12 +435,8 @@ func (n *Notary) getNotaryServiceFeePerKey(ic *interop.Context, _ []stackitem.It
 
 // GetNotaryServiceFeePerKey is an internal representation of Notary getNotaryServiceFeePerKey method.
 func (n *Notary) GetNotaryServiceFeePerKey(dao *dao.Simple) int64 {
-	n.lock.RLock()
+	cache := dao.GetROCache(n.ID).(*NotaryCache)
-	defer n.lock.RUnlock()
+	return cache.notaryServiceFeePerKey
-	if n.isValid {
-		return n.notaryServiceFeePerKey
-	}
-	return getIntWithKey(n.ID, dao, notaryServiceFeeKey)
 }
 
 // setNotaryServiceFeePerKey is Notary contract method and sets a reward per notary request key for notary nodes.
@@ -441,10 +448,9 @@ func (n *Notary) setNotaryServiceFeePerKey(ic *interop.Context, args []stackitem
 	if !n.NEO.checkCommittee(ic) {
 		panic("invalid committee signature")
 	}
-	n.lock.Lock()
-	defer n.lock.Unlock()
 	setIntWithKey(n.ID, ic.DAO, notaryServiceFeeKey, int64(value))
-	n.isValid = false
+	cache := ic.DAO.GetRWCache(n.ID).(*NotaryCache)
+	cache.notaryServiceFeePerKey = value
 	return stackitem.Null{}
 }
 

pkg/core/native/oracle.go

@@ -40,15 +40,16 @@ type Oracle struct {
 	Desig        *Designate
 	oracleScript []byte
 
-	requestPrice        atomic.Value
-	requestPriceChanged atomic.Value
-
 	// Module is an oracle module capable of talking with the external world.
 	Module atomic.Value
 	// newRequests contains new requests created during current block.
 	newRequests map[uint64]*state.OracleRequest
 }
 
+type OracleCache struct {
+	requestPrice int64
+}
+
 const (
 	oracleContractID  = -9
 	maxURLLength      = 256
@@ -82,6 +83,22 @@ var (
 	ErrResponseNotFound = errors.New("oracle response not found")
 )
 
+var (
+	_ interop.Contract        = (*Oracle)(nil)
+	_ dao.NativeContractCache = (*OracleCache)(nil)
+)
+
+// Copy implements NativeContractCache interface.
+func (c *OracleCache) Copy() dao.NativeContractCache {
+	cp := &OracleCache{}
+	copyOracleCache(c, cp)
+	return cp
+}
+
+func copyOracleCache(src, dst *OracleCache) {
+	*dst = *src
+}
+
 func newOracle() *Oracle {
 	o := &Oracle{ContractMD: *interop.NewContractMD(nativenames.Oracle, oracleContractID)}
 	defer o.UpdateHash()
@@ -121,8 +138,6 @@ func newOracle() *Oracle {
 	md = newMethodAndPrice(o.setPrice, 1<<15, callflag.States)
 	o.AddMethod(md, desc)
 
-	o.requestPriceChanged.Store(true)
-
 	return o
 }
 
@@ -143,10 +158,6 @@ func (o *Oracle) OnPersist(ic *interop.Context) error {
 // PostPersist represents `postPersist` method.
 func (o *Oracle) PostPersist(ic *interop.Context) error {
 	p := o.getPriceInternal(ic.DAO)
-	if o.requestPriceChanged.Load().(bool) {
-		o.requestPrice.Store(p)
-		o.requestPriceChanged.Store(false)
-	}
 
 	var nodes keys.PublicKeys
 	var reward []big.Int
@@ -220,11 +231,20 @@ func (o *Oracle) Metadata() *interop.ContractMD {
 func (o *Oracle) Initialize(ic *interop.Context) error {
 	setIntWithKey(o.ID, ic.DAO, prefixRequestID, 0)
 	setIntWithKey(o.ID, ic.DAO, prefixRequestPrice, DefaultOracleRequestPrice)
-	o.requestPrice.Store(int64(DefaultOracleRequestPrice))
+
-	o.requestPriceChanged.Store(false)
+	cache := &OracleCache{
+		requestPrice: int64(DefaultOracleRequestPrice),
+	}
+	ic.DAO.SetCache(o.ID, cache)
 	return nil
 }
 
+func (o *Oracle) InitializeCache(d *dao.Simple) {
+	cache := &OracleCache{}
+	cache.requestPrice = getIntWithKey(o.ID, d, prefixRequestPrice)
+	d.SetCache(o.ID, cache)
+}
+
 func getResponse(tx *transaction.Transaction) *transaction.OracleResponse {
 	for i := range tx.Attributes {
 		if tx.Attributes[i].Type == transaction.OracleResponseT {
@@ -439,10 +459,8 @@ func (o *Oracle) getPrice(ic *interop.Context, _ []stackitem.Item) stackitem.Ite
 }
 
 func (o *Oracle) getPriceInternal(d *dao.Simple) int64 {
-	if !o.requestPriceChanged.Load().(bool) {
+	cache := d.GetROCache(o.ID).(*OracleCache)
-		return o.requestPrice.Load().(int64)
+	return cache.requestPrice
-	}
-	return getIntWithKey(o.ID, d, prefixRequestPrice)
 }
 
 func (o *Oracle) setPrice(ic *interop.Context, args []stackitem.Item) stackitem.Item {
@@ -454,7 +472,8 @@ func (o *Oracle) setPrice(ic *interop.Context, args []stackitem.Item) stackitem.
 		panic("invalid committee signature")
 	}
 	setIntWithKey(o.ID, ic.DAO, prefixRequestPrice, price.Int64())
-	o.requestPriceChanged.Store(true)
+	cache := ic.DAO.GetRWCache(o.ID).(*OracleCache)
+	cache.requestPrice = price.Int64()
 	return stackitem.Null{}
 }
 

pkg/core/native/policy.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"math/big"
 	"sort"
-	"sync"
 
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop"
@@ -52,12 +51,10 @@ var (
 // Policy represents Policy native contract.
 type Policy struct {
 	interop.ContractMD
-	NEO  *NEO
+	NEO *NEO
-	lock sync.RWMutex
+}
-	// isValid defies whether cached values were changed during the current
+
-	// consensus iteration. If false, these values will be updated after
+type PolicyCache struct {
-	// blockchain DAO persisting. If true, we can safely use cached values.
-	isValid            bool
 	execFeeFactor      uint32
 	feePerByte         int64
 	maxVerificationGas int64
@@ -65,7 +62,23 @@ type Policy struct {
 	blockedAccounts    []util.Uint160
 }
 
-var _ interop.Contract = (*Policy)(nil)
+var (
+	_ interop.Contract        = (*Policy)(nil)
+	_ dao.NativeContractCache = (*PolicyCache)(nil)
+)
+
+// Copy implements NativeContractCache interface.
+func (c *PolicyCache) Copy() dao.NativeContractCache {
+	cp := &PolicyCache{}
+	copyPolicyCache(c, cp)
+	return cp
+}
+
+func copyPolicyCache(src, dst *PolicyCache) {
+	*dst = *src
+	dst.blockedAccounts = make([]util.Uint160, len(src.blockedAccounts))
+	copy(dst.blockedAccounts, src.blockedAccounts)
+}
 
 // newPolicy returns Policy native contract.
 func newPolicy() *Policy {
@@ -128,16 +141,51 @@ func (p *Policy) Initialize(ic *interop.Context) error {
 	setIntWithKey(p.ID, ic.DAO, execFeeFactorKey, defaultExecFeeFactor)
 	setIntWithKey(p.ID, ic.DAO, storagePriceKey, DefaultStoragePrice)
 
-	p.isValid = true
+	cache := &PolicyCache{
-	p.execFeeFactor = defaultExecFeeFactor
+		execFeeFactor:      defaultExecFeeFactor,
-	p.feePerByte = defaultFeePerByte
+		feePerByte:         defaultFeePerByte,
-	p.maxVerificationGas = defaultMaxVerificationGas
+		maxVerificationGas: defaultMaxVerificationGas,
-	p.storagePrice = DefaultStoragePrice
+		storagePrice:       DefaultStoragePrice,
-	p.blockedAccounts = make([]util.Uint160, 0)
+		blockedAccounts:    make([]util.Uint160, 0),
+	}
+	ic.DAO.SetCache(p.ID, cache)
 
 	return nil
 }
 
+func (p *Policy) InitializeCache(d *dao.Simple) error {
+	cache := &PolicyCache{}
+	err := p.fillCacheFromDAO(cache, d)
+	if err != nil {
+		return err
+	}
+	d.SetCache(p.ID, cache)
+	return nil
+}
+
+func (p *Policy) fillCacheFromDAO(cache *PolicyCache, d *dao.Simple) error {
+	cache.execFeeFactor = uint32(getIntWithKey(p.ID, d, execFeeFactorKey))
+	cache.feePerByte = getIntWithKey(p.ID, d, feePerByteKey)
+	cache.maxVerificationGas = defaultMaxVerificationGas
+	cache.storagePrice = uint32(getIntWithKey(p.ID, d, storagePriceKey))
+
+	cache.blockedAccounts = make([]util.Uint160, 0)
+	var fErr error
+	d.Seek(p.ID, storage.SeekRange{Prefix: []byte{blockedAccountPrefix}}, func(k, _ []byte) bool {
+		hash, err := util.Uint160DecodeBytesBE(k)
+		if err != nil {
+			fErr = fmt.Errorf("failed to decode blocked account hash: %w", err)
+			return false
+		}
+		cache.blockedAccounts = append(cache.blockedAccounts, hash)
+		return true
+	})
+	if fErr != nil {
+		return fmt.Errorf("failed to initialize blocked accounts: %w", fErr)
+	}
+	return nil
+}
+
 // OnPersist implements Contract interface.
 func (p *Policy) OnPersist(ic *interop.Context) error {
 	return nil
@@ -145,32 +193,7 @@ func (p *Policy) OnPersist(ic *interop.Context) error {
 
 // PostPersist implements Contract interface.
 func (p *Policy) PostPersist(ic *interop.Context) error {
-	p.lock.Lock()
+	return nil
-	defer p.lock.Unlock()
-	if p.isValid {
-		return nil
-	}
-
-	p.execFeeFactor = uint32(getIntWithKey(p.ID, ic.DAO, execFeeFactorKey))
-	p.feePerByte = getIntWithKey(p.ID, ic.DAO, feePerByteKey)
-	p.maxVerificationGas = defaultMaxVerificationGas
-	p.storagePrice = uint32(getIntWithKey(p.ID, ic.DAO, storagePriceKey))
-
-	p.blockedAccounts = make([]util.Uint160, 0)
-	var fErr error
-	ic.DAO.Seek(p.ID, storage.SeekRange{Prefix: []byte{blockedAccountPrefix}}, func(k, _ []byte) bool {
-		hash, err := util.Uint160DecodeBytesBE(k)
-		if err != nil {
-			fErr = fmt.Errorf("failed to decode blocked account hash: %w", err)
-			return false
-		}
-		p.blockedAccounts = append(p.blockedAccounts, hash)
-		return true
-	})
-	if fErr == nil {
-		p.isValid = true
-	}
-	return fErr
 }
 
 // getFeePerByte is Policy contract method and returns required transaction's fee
@@ -181,20 +204,14 @@ func (p *Policy) getFeePerByte(ic *interop.Context, _ []stackitem.Item) stackite
 
 // GetFeePerByteInternal returns required transaction's fee per byte.
 func (p *Policy) GetFeePerByteInternal(dao *dao.Simple) int64 {
-	p.lock.RLock()
+	cache := dao.GetROCache(p.ID).(*PolicyCache)
-	defer p.lock.RUnlock()
+	return cache.feePerByte
-	if p.isValid {
-		return p.feePerByte
-	}
-	return getIntWithKey(p.ID, dao, feePerByteKey)
 }
 
 // GetMaxVerificationGas returns maximum gas allowed to be burned during verificaion.
-func (p *Policy) GetMaxVerificationGas(_ *dao.Simple) int64 {
+func (p *Policy) GetMaxVerificationGas(dao *dao.Simple) int64 {
-	if p.isValid {
+	cache := dao.GetROCache(p.ID).(*PolicyCache)
-		return p.maxVerificationGas
+	return cache.maxVerificationGas
-	}
-	return defaultMaxVerificationGas
 }
 
 func (p *Policy) getExecFeeFactor(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
@@ -203,12 +220,8 @@ func (p *Policy) getExecFeeFactor(ic *interop.Context, _ []stackitem.Item) stack
 
 // GetExecFeeFactorInternal returns current execution fee factor.
 func (p *Policy) GetExecFeeFactorInternal(d *dao.Simple) int64 {
-	p.lock.RLock()
+	cache := d.GetROCache(p.ID).(*PolicyCache)
-	defer p.lock.RUnlock()
+	return int64(cache.execFeeFactor)
-	if p.isValid {
-		return int64(p.execFeeFactor)
-	}
-	return getIntWithKey(p.ID, d, execFeeFactorKey)
 }
 
 func (p *Policy) setExecFeeFactor(ic *interop.Context, args []stackitem.Item) stackitem.Item {
@@ -219,35 +232,38 @@ func (p *Policy) setExecFeeFactor(ic *interop.Context, args []stackitem.Item) st
 	if !p.NEO.checkCommittee(ic) {
 		panic("invalid committee signature")
 	}
-	p.lock.Lock()
-	defer p.lock.Unlock()
 	setIntWithKey(p.ID, ic.DAO, execFeeFactorKey, int64(value))
-	p.isValid = false
+	cache := ic.DAO.GetRWCache(p.ID).(*PolicyCache)
+	cache.execFeeFactor = value
 	return stackitem.Null{}
 }
 
 // isBlocked is Policy contract method and checks whether provided account is blocked.
 func (p *Policy) isBlocked(ic *interop.Context, args []stackitem.Item) stackitem.Item {
 	hash := toUint160(args[0])
-	return stackitem.NewBool(p.IsBlockedInternal(ic.DAO, hash))
+	_, blocked := p.isBlockedInternal(ic.DAO, hash)
+	return stackitem.NewBool(blocked)
 }
 
-// IsBlockedInternal checks whether provided account is blocked.
+// IsBlocked checks whether provided account is blocked.
-func (p *Policy) IsBlockedInternal(dao *dao.Simple, hash util.Uint160) bool {
+func (p *Policy) IsBlocked(dao *dao.Simple, hash util.Uint160) bool {
-	p.lock.RLock()
+	_, isBlocked := p.isBlockedInternal(dao, hash)
-	defer p.lock.RUnlock()
+	return isBlocked
-	if p.isValid {
+}
-		length := len(p.blockedAccounts)
+
-		i := sort.Search(length, func(i int) bool {
+// isBlockedInternal checks whether provided account is blocked. It returns position
-			return !p.blockedAccounts[i].Less(hash)
+// of the blocked account in the blocked accounts list (or the position it should be
-		})
+// put at).
-		if length != 0 && i != length && p.blockedAccounts[i].Equals(hash) {
+func (p *Policy) isBlockedInternal(dao *dao.Simple, hash util.Uint160) (int, bool) {
-			return true
+	cache := dao.GetROCache(p.ID).(*PolicyCache)
-		}
+	length := len(cache.blockedAccounts)
-		return false
+	i := sort.Search(length, func(i int) bool {
+		return !cache.blockedAccounts[i].Less(hash)
+	})
+	if length != 0 && i != length && cache.blockedAccounts[i].Equals(hash) {
+		return i, true
 	}
-	key := append([]byte{blockedAccountPrefix}, hash.BytesBE()...)
+	return i, false
-	return dao.GetStorageItem(p.ID, key) != nil
 }
 
 func (p *Policy) getStoragePrice(ic *interop.Context, _ []stackitem.Item) stackitem.Item {
@@ -256,12 +272,8 @@ func (p *Policy) getStoragePrice(ic *interop.Context, _ []stackitem.Item) stacki
 
 // GetStoragePriceInternal returns current execution fee factor.
 func (p *Policy) GetStoragePriceInternal(d *dao.Simple) int64 {
-	p.lock.RLock()
+	cache := d.GetROCache(p.ID).(*PolicyCache)
-	defer p.lock.RUnlock()
+	return int64(cache.storagePrice)
-	if p.isValid {
-		return int64(p.storagePrice)
-	}
-	return getIntWithKey(p.ID, d, storagePriceKey)
 }
 
 func (p *Policy) setStoragePrice(ic *interop.Context, args []stackitem.Item) stackitem.Item {
@@ -272,10 +284,9 @@ func (p *Policy) setStoragePrice(ic *interop.Context, args []stackitem.Item) sta
 	if !p.NEO.checkCommittee(ic) {
 		panic("invalid committee signature")
 	}
-	p.lock.Lock()
-	defer p.lock.Unlock()
 	setIntWithKey(p.ID, ic.DAO, storagePriceKey, int64(value))
-	p.isValid = false
+	cache := ic.DAO.GetRWCache(p.ID).(*PolicyCache)
+	cache.storagePrice = value
 	return stackitem.Null{}
 }
 
@@ -288,10 +299,9 @@ func (p *Policy) setFeePerByte(ic *interop.Context, args []stackitem.Item) stack
 	if !p.NEO.checkCommittee(ic) {
 		panic("invalid committee signature")
 	}
-	p.lock.Lock()
-	defer p.lock.Unlock()
 	setIntWithKey(p.ID, ic.DAO, feePerByteKey, value)
-	p.isValid = false
+	cache := ic.DAO.GetRWCache(p.ID).(*PolicyCache)
+	cache.feePerByte = value
 	return stackitem.Null{}
 }
 
@@ -307,14 +317,19 @@ func (p *Policy) blockAccount(ic *interop.Context, args []stackitem.Item) stacki
 			panic("cannot block native contract")
 		}
 	}
-	if p.IsBlockedInternal(ic.DAO, hash) {
+	i, blocked := p.isBlockedInternal(ic.DAO, hash)
+	if blocked {
 		return stackitem.NewBool(false)
 	}
 	key := append([]byte{blockedAccountPrefix}, hash.BytesBE()...)
-	p.lock.Lock()
-	defer p.lock.Unlock()
 	ic.DAO.PutStorageItem(p.ID, key, state.StorageItem{})
-	p.isValid = false
+	cache := ic.DAO.GetRWCache(p.ID).(*PolicyCache)
+	if len(cache.blockedAccounts) == i {
+		cache.blockedAccounts = append(cache.blockedAccounts, hash)
+	} else {
+		cache.blockedAccounts = append(cache.blockedAccounts[:i+1], cache.blockedAccounts[i:]...)
+		cache.blockedAccounts[i] = hash
+	}
 	return stackitem.NewBool(true)
 }
 
@@ -325,14 +340,14 @@ func (p *Policy) unblockAccount(ic *interop.Context, args []stackitem.Item) stac
 		panic("invalid committee signature")
 	}
 	hash := toUint160(args[0])
-	if !p.IsBlockedInternal(ic.DAO, hash) {
+	i, blocked := p.isBlockedInternal(ic.DAO, hash)
+	if !blocked {
 		return stackitem.NewBool(false)
 	}
 	key := append([]byte{blockedAccountPrefix}, hash.BytesBE()...)
-	p.lock.Lock()
-	defer p.lock.Unlock()
 	ic.DAO.DeleteStorageItem(p.ID, key)
-	p.isValid = false
+	cache := ic.DAO.GetRWCache(p.ID).(*PolicyCache)
+	cache.blockedAccounts = append(cache.blockedAccounts[:i], cache.blockedAccounts[i+1:]...)
 	return stackitem.NewBool(true)
 }
 
@@ -341,7 +356,7 @@ func (p *Policy) unblockAccount(ic *interop.Context, args []stackitem.Item) stac
 // fee limit.
 func (p *Policy) CheckPolicy(d *dao.Simple, tx *transaction.Transaction) error {
 	for _, signer := range tx.Signers {
-		if p.IsBlockedInternal(d, signer.Account) {
+		if _, isBlocked := p.isBlockedInternal(d, signer.Account); isBlocked {
 			return fmt.Errorf("account %s is blocked", signer.Account.StringLE())
 		}
 	}

pkg/core/stateroot/module.go

@@ -1,6 +1,7 @@
 package stateroot
 
 import (
+	"bytes"
 	"encoding/binary"
 	"errors"
 	"fmt"
@@ -101,6 +102,34 @@ func (s *Module) GetStateRoot(height uint32) (*state.MPTRoot, error) {
 	return s.getStateRoot(makeStateRootKey(height))
 }
 
+// GetLatestStateHeight returns the latest blockchain height by the given stateroot.
+func (s *Module) GetLatestStateHeight(root util.Uint256) (uint32, error) {
+	rootBytes := root.BytesBE()
+	rootStartOffset := 1 + 4 // stateroot version (1 byte) + stateroot index (4 bytes)
+	rootEndOffset := rootStartOffset + util.Uint256Size
+	var (
+		h       uint32
+		found   bool
+		rootKey = makeStateRootKey(s.localHeight.Load())
+	)
+	s.Store.Seek(storage.SeekRange{
+		Prefix:    []byte{rootKey[0]}, // DataMPTAux
+		Start:     rootKey[1:],        // Start is a value that should be appended to the Prefix
+		Backwards: true,
+	}, func(k, v []byte) bool {
+		if len(k) == 5 && bytes.Equal(v[rootStartOffset:rootEndOffset], rootBytes) {
+			h = binary.BigEndian.Uint32(k[1:]) // cut prefix DataMPTAux
+			found = true
+			return false
+		}
+		return true
+	})
+	if found {
+		return h, nil
+	}
+	return h, storage.ErrKeyNotFound
+}
+
 // CurrentLocalStateRoot returns hash of the local state root.
 func (s *Module) CurrentLocalStateRoot() util.Uint256 {
 	return s.currentLocal.Load().(util.Uint256)

pkg/core/stateroot_test.go

@@ -296,3 +296,20 @@ func checkVoteBroadcasted(t *testing.T, bc *core.Blockchain, p *payload.Extensib
 	require.True(t, len(pubs) > int(valIndex))
 	require.True(t, pubs[valIndex].VerifyHashable(vote.Signature, uint32(netmode.UnitTestNet), r))
 }
+
+func TestStateroot_GetLatestStateHeight(t *testing.T) {
+	bc, validators, committee := chain.NewMultiWithCustomConfig(t, func(c *config.ProtocolConfiguration) {
+		c.P2PSigExtensions = true
+	})
+	e := neotest.NewExecutor(t, bc, validators, committee)
+	initBasicChain(t, e)
+
+	m := bc.GetStateModule()
+	for i := uint32(0); i < bc.BlockHeight(); i++ {
+		r, err := m.GetStateRoot(i)
+		require.NoError(t, err)
+		h, err := bc.GetStateModule().GetLatestStateHeight(r.Root)
+		require.NoError(t, err, i)
+		require.Equal(t, i, h)
+	}
+}

pkg/core/storage/memcached_store.go

@@ -365,7 +365,6 @@ func (s *MemCachedStore) persist(isSync bool) (int, error) {
 	if !isSync {
 		s.mut.Unlock()
 	}
-
 	err = tempstore.ps.PutChangeSet(tempstore.mem, tempstore.stor)
 
 	if !isSync {

pkg/rpc/client/rpc.go

@@ -588,6 +588,33 @@ func (c *Client) InvokeScript(script []byte, signers []transaction.Signer) (*res
 	return c.invokeSomething("invokescript", p, signers)
 }
 
+// InvokeScriptAtHeight returns the result of the given script after running it
+// true the VM using the provided chain state retrieved from the specified chain
+// height.
+// NOTE: This is a test invoke and will not affect the blockchain.
+func (c *Client) InvokeScriptAtHeight(height uint32, script []byte, signers []transaction.Signer) (*result.Invoke, error) {
+	var p = request.NewRawParams(height, script)
+	return c.invokeSomething("invokescripthistoric", p, signers)
+}
+
+// InvokeScriptAtBlock returns the result of the given script after running it
+// true the VM using the provided chain state retrieved from the specified block
+// hash.
+// NOTE: This is a test invoke and will not affect the blockchain.
+func (c *Client) InvokeScriptAtBlock(blockHash util.Uint256, script []byte, signers []transaction.Signer) (*result.Invoke, error) {
+	var p = request.NewRawParams(blockHash.StringLE(), script)
+	return c.invokeSomething("invokescripthistoric", p, signers)
+}
+
+// InvokeScriptWithState returns the result of the given script after running it
+// true the VM using the provided chain state retrieved from the specified
+// stateroot hash.
+// NOTE: This is a test invoke and will not affect the blockchain.
+func (c *Client) InvokeScriptWithState(stateroot util.Uint256, script []byte, signers []transaction.Signer) (*result.Invoke, error) {
+	var p = request.NewRawParams(stateroot.StringLE(), script)
+	return c.invokeSomething("invokescripthistoric", p, signers)
+}
+
 // InvokeFunction returns the results after calling the smart contract scripthash
 // with the given operation and parameters.
 // NOTE: this is test invoke and will not affect the blockchain.
@@ -596,6 +623,33 @@ func (c *Client) InvokeFunction(contract util.Uint160, operation string, params
 	return c.invokeSomething("invokefunction", p, signers)
 }
 
+// InvokeFunctionAtHeight returns the results after calling the smart contract
+// with the given operation and parameters at the given blockchain state
+// specified by the blockchain height.
+// NOTE: this is test invoke and will not affect the blockchain.
+func (c *Client) InvokeFunctionAtHeight(height uint32, contract util.Uint160, operation string, params []smartcontract.Parameter, signers []transaction.Signer) (*result.Invoke, error) {
+	var p = request.NewRawParams(height, contract.StringLE(), operation, params)
+	return c.invokeSomething("invokefunctionhistoric", p, signers)
+}
+
+// InvokeFunctionAtBlock returns the results after calling the smart contract
+// with the given operation and parameters at given the blockchain state
+// specified by the block hash.
+// NOTE: this is test invoke and will not affect the blockchain.
+func (c *Client) InvokeFunctionAtBlock(blockHash util.Uint256, contract util.Uint160, operation string, params []smartcontract.Parameter, signers []transaction.Signer) (*result.Invoke, error) {
+	var p = request.NewRawParams(blockHash.StringLE(), contract.StringLE(), operation, params)
+	return c.invokeSomething("invokefunctionhistoric", p, signers)
+}
+
+// InvokeFunctionWithState returns the results after calling the smart contract
+// with the given operation and parameters at the given blockchain state defined
+// by the specified stateroot hash.
+// NOTE: this is test invoke and will not affect the blockchain.
+func (c *Client) InvokeFunctionWithState(stateroot util.Uint256, contract util.Uint160, operation string, params []smartcontract.Parameter, signers []transaction.Signer) (*result.Invoke, error) {
+	var p = request.NewRawParams(stateroot.StringLE(), contract.StringLE(), operation, params)
+	return c.invokeSomething("invokefunctionhistoric", p, signers)
+}
+
 // InvokeContractVerify returns the results after calling `verify` method of the smart contract
 // with the given parameters under verification trigger type.
 // NOTE: this is test invoke and will not affect the blockchain.
@@ -604,6 +658,33 @@ func (c *Client) InvokeContractVerify(contract util.Uint160, params []smartcontr
 	return c.invokeSomething("invokecontractverify", p, signers, witnesses...)
 }
 
+// InvokeContractVerifyAtHeight returns the results after calling `verify` method
+// of the smart contract with the given parameters under verification trigger type
+// at the blockchain state specified by the blockchain height.
+// NOTE: this is test invoke and will not affect the blockchain.
+func (c *Client) InvokeContractVerifyAtHeight(height uint32, contract util.Uint160, params []smartcontract.Parameter, signers []transaction.Signer, witnesses ...transaction.Witness) (*result.Invoke, error) {
+	var p = request.NewRawParams(height, contract.StringLE(), params)
+	return c.invokeSomething("invokecontractverifyhistoric", p, signers, witnesses...)
+}
+
+// InvokeContractVerifyAtBlock returns the results after calling `verify` method
+// of the smart contract with the given parameters under verification trigger type
+// at the blockchain state specified by the block hash.
+// NOTE: this is test invoke and will not affect the blockchain.
+func (c *Client) InvokeContractVerifyAtBlock(blockHash util.Uint256, contract util.Uint160, params []smartcontract.Parameter, signers []transaction.Signer, witnesses ...transaction.Witness) (*result.Invoke, error) {
+	var p = request.NewRawParams(blockHash.StringLE(), contract.StringLE(), params)
+	return c.invokeSomething("invokecontractverifyhistoric", p, signers, witnesses...)
+}
+
+// InvokeContractVerifyWithState returns the results after calling `verify` method
+// of the smart contract with the given parameters under verification trigger type
+// at the blockchain state specified by the stateroot hash.
+// NOTE: this is test invoke and will not affect the blockchain.
+func (c *Client) InvokeContractVerifyWithState(stateroot util.Uint256, contract util.Uint160, params []smartcontract.Parameter, signers []transaction.Signer, witnesses ...transaction.Witness) (*result.Invoke, error) {
+	var p = request.NewRawParams(stateroot.StringLE(), contract.StringLE(), params)
+	return c.invokeSomething("invokecontractverifyhistoric", p, signers, witnesses...)
+}
+
 // invokeSomething is an inner wrapper for Invoke* functions.
 func (c *Client) invokeSomething(method string, p request.RawParams, signers []transaction.Signer, witnesses ...transaction.Witness) (*result.Invoke, error) {
 	var resp = new(result.Invoke)

pkg/rpc/server/client_test.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"encoding/base64"
 	"encoding/hex"
+	"strings"
 	"testing"
 
 	"github.com/nspcc-dev/neo-go/internal/testchain"
+	"github.com/nspcc-dev/neo-go/pkg/core"
 	"github.com/nspcc-dev/neo-go/pkg/core/fee"
 	"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
@@ -766,6 +768,56 @@ func TestInvokeVerify(t *testing.T) {
 		require.True(t, res.Stack[0].Value().(bool))
 	})
 
+	t.Run("positive, historic, by height, with signer", func(t *testing.T) {
+		h := chain.BlockHeight() - 1
+		res, err := c.InvokeContractVerifyAtHeight(h, contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}})
+		require.NoError(t, err)
+		require.Equal(t, "HALT", res.State)
+		require.Equal(t, 1, len(res.Stack))
+		require.True(t, res.Stack[0].Value().(bool))
+	})
+
+	t.Run("positive, historic, by block, with signer", func(t *testing.T) {
+		res, err := c.InvokeContractVerifyAtBlock(chain.GetHeaderHash(int(chain.BlockHeight())-1), contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}})
+		require.NoError(t, err)
+		require.Equal(t, "HALT", res.State)
+		require.Equal(t, 1, len(res.Stack))
+		require.True(t, res.Stack[0].Value().(bool))
+	})
+
+	t.Run("positive, historic, by stateroot, with signer", func(t *testing.T) {
+		h := chain.BlockHeight() - 1
+		sr, err := chain.GetStateModule().GetStateRoot(h)
+		require.NoError(t, err)
+		res, err := c.InvokeContractVerifyWithState(sr.Root, contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}})
+		require.NoError(t, err)
+		require.Equal(t, "HALT", res.State)
+		require.Equal(t, 1, len(res.Stack))
+		require.True(t, res.Stack[0].Value().(bool))
+	})
+
+	t.Run("bad, historic, by hash: contract not found", func(t *testing.T) {
+		var h uint32 = 1
+		_, err = c.InvokeContractVerifyAtHeight(h, contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}})
+		require.Error(t, err)
+		require.True(t, strings.Contains(err.Error(), core.ErrUnknownVerificationContract.Error())) // contract wasn't deployed at block #1 yet
+	})
+
+	t.Run("bad, historic, by block: contract not found", func(t *testing.T) {
+		_, err = c.InvokeContractVerifyAtBlock(chain.GetHeaderHash(1), contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}})
+		require.Error(t, err)
+		require.True(t, strings.Contains(err.Error(), core.ErrUnknownVerificationContract.Error())) // contract wasn't deployed at block #1 yet
+	})
+
+	t.Run("bad, historic, by stateroot: contract not found", func(t *testing.T) {
+		var h uint32 = 1
+		sr, err := chain.GetStateModule().GetStateRoot(h)
+		require.NoError(t, err)
+		_, err = c.InvokeContractVerifyWithState(sr.Root, contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}})
+		require.Error(t, err)
+		require.True(t, strings.Contains(err.Error(), core.ErrUnknownVerificationContract.Error())) // contract wasn't deployed at block #1 yet
+	})
+
 	t.Run("positive, with signer and witness", func(t *testing.T) {
 		res, err := c.InvokeContractVerify(contract, smartcontract.Params{}, []transaction.Signer{{Account: testchain.PrivateKeyByID(0).PublicKey().GetScriptHash()}}, transaction.Witness{InvocationScript: []byte{byte(opcode.PUSH1), byte(opcode.RET)}})
 		require.NoError(t, err)

pkg/rpc/server/server.go

@@ -24,6 +24,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
 	"github.com/nspcc-dev/neo-go/pkg/core/fee"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
 	"github.com/nspcc-dev/neo-go/pkg/core/interop/iterator"
 	"github.com/nspcc-dev/neo-go/pkg/core/mempoolevent"
 	"github.com/nspcc-dev/neo-go/pkg/core/mpt"
@@ -108,46 +109,49 @@ const (
 )
 
 var rpcHandlers = map[string]func(*Server, request.Params) (interface{}, *response.Error){
-	"calculatenetworkfee":    (*Server).calculateNetworkFee,
+	"calculatenetworkfee":          (*Server).calculateNetworkFee,
-	"findstates":             (*Server).findStates,
+	"findstates":                   (*Server).findStates,
-	"getapplicationlog":      (*Server).getApplicationLog,
+	"getapplicationlog":            (*Server).getApplicationLog,
-	"getbestblockhash":       (*Server).getBestBlockHash,
+	"getbestblockhash":             (*Server).getBestBlockHash,
-	"getblock":               (*Server).getBlock,
+	"getblock":                     (*Server).getBlock,
-	"getblockcount":          (*Server).getBlockCount,
+	"getblockcount":                (*Server).getBlockCount,
-	"getblockhash":           (*Server).getBlockHash,
+	"getblockhash":                 (*Server).getBlockHash,
-	"getblockheader":         (*Server).getBlockHeader,
+	"getblockheader":               (*Server).getBlockHeader,
-	"getblockheadercount":    (*Server).getBlockHeaderCount,
+	"getblockheadercount":          (*Server).getBlockHeaderCount,
-	"getblocksysfee":         (*Server).getBlockSysFee,
+	"getblocksysfee":               (*Server).getBlockSysFee,
-	"getcommittee":           (*Server).getCommittee,
+	"getcommittee":                 (*Server).getCommittee,
-	"getconnectioncount":     (*Server).getConnectionCount,
+	"getconnectioncount":           (*Server).getConnectionCount,
-	"getcontractstate":       (*Server).getContractState,
+	"getcontractstate":             (*Server).getContractState,
-	"getnativecontracts":     (*Server).getNativeContracts,
+	"getnativecontracts":           (*Server).getNativeContracts,
-	"getnep11balances":       (*Server).getNEP11Balances,
+	"getnep11balances":             (*Server).getNEP11Balances,
-	"getnep11properties":     (*Server).getNEP11Properties,
+	"getnep11properties":           (*Server).getNEP11Properties,
-	"getnep11transfers":      (*Server).getNEP11Transfers,
+	"getnep11transfers":            (*Server).getNEP11Transfers,
-	"getnep17balances":       (*Server).getNEP17Balances,
+	"getnep17balances":             (*Server).getNEP17Balances,
-	"getnep17transfers":      (*Server).getNEP17Transfers,
+	"getnep17transfers":            (*Server).getNEP17Transfers,
-	"getpeers":               (*Server).getPeers,
+	"getpeers":                     (*Server).getPeers,
-	"getproof":               (*Server).getProof,
+	"getproof":                     (*Server).getProof,
-	"getrawmempool":          (*Server).getRawMempool,
+	"getrawmempool":                (*Server).getRawMempool,
-	"getrawtransaction":      (*Server).getrawtransaction,
+	"getrawtransaction":            (*Server).getrawtransaction,
-	"getstate":               (*Server).getState,
+	"getstate":                     (*Server).getState,
-	"getstateheight":         (*Server).getStateHeight,
+	"getstateheight":               (*Server).getStateHeight,
-	"getstateroot":           (*Server).getStateRoot,
+	"getstateroot":                 (*Server).getStateRoot,
-	"getstorage":             (*Server).getStorage,
+	"getstorage":                   (*Server).getStorage,
-	"gettransactionheight":   (*Server).getTransactionHeight,
+	"gettransactionheight":         (*Server).getTransactionHeight,
-	"getunclaimedgas":        (*Server).getUnclaimedGas,
+	"getunclaimedgas":              (*Server).getUnclaimedGas,
-	"getnextblockvalidators": (*Server).getNextBlockValidators,
+	"getnextblockvalidators":       (*Server).getNextBlockValidators,
-	"getversion":             (*Server).getVersion,
+	"getversion":                   (*Server).getVersion,
-	"invokefunction":         (*Server).invokeFunction,
+	"invokefunction":               (*Server).invokeFunction,
-	"invokescript":           (*Server).invokescript,
+	"invokefunctionhistoric":       (*Server).invokeFunctionHistoric,
-	"invokecontractverify":   (*Server).invokeContractVerify,
+	"invokescript":                 (*Server).invokescript,
-	"sendrawtransaction":     (*Server).sendrawtransaction,
+	"invokescripthistoric":         (*Server).invokescripthistoric,
-	"submitblock":            (*Server).submitBlock,
+	"invokecontractverify":         (*Server).invokeContractVerify,
-	"submitnotaryrequest":    (*Server).submitNotaryRequest,
+	"invokecontractverifyhistoric": (*Server).invokeContractVerifyHistoric,
-	"submitoracleresponse":   (*Server).submitOracleResponse,
+	"sendrawtransaction":           (*Server).sendrawtransaction,
-	"validateaddress":        (*Server).validateAddress,
+	"submitblock":                  (*Server).submitBlock,
-	"verifyproof":            (*Server).verifyProof,
+	"submitnotaryrequest":          (*Server).submitNotaryRequest,
+	"submitoracleresponse":         (*Server).submitOracleResponse,
+	"validateaddress":              (*Server).validateAddress,
+	"verifyproof":                  (*Server).verifyProof,
 }
 
 var rpcWsHandlers = map[string]func(*Server, request.Params, *subscriber) (interface{}, *response.Error){
@@ -866,7 +870,7 @@ func (s *Server) invokeReadOnly(bw *io.BufBinWriter, h util.Uint160, method stri
 	}
 	script := bw.Bytes()
 	tx := &transaction.Transaction{Script: script}
-	b, err := s.getFakeNextBlock()
+	b, err := s.getFakeNextBlock(s.chain.BlockHeight() + 1)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -1571,16 +1575,40 @@ func (s *Server) getCommittee(_ request.Params) (interface{}, *response.Error) {
 
 // invokeFunction implements the `invokeFunction` RPC call.
 func (s *Server) invokeFunction(reqParams request.Params) (interface{}, *response.Error) {
+	tx, verbose, respErr := s.getInvokeFunctionParams(reqParams)
+	if respErr != nil {
+		return nil, respErr
+	}
+	return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, nil, verbose)
+}
+
+// invokeFunctionHistoric implements the `invokeFunctionHistoric` RPC call.
+func (s *Server) invokeFunctionHistoric(reqParams request.Params) (interface{}, *response.Error) {
+	b, respErr := s.getHistoricParams(reqParams)
+	if respErr != nil {
+		return nil, respErr
+	}
 	if len(reqParams) < 2 {
 		return nil, response.ErrInvalidParams
 	}
+	tx, verbose, respErr := s.getInvokeFunctionParams(reqParams[1:])
+	if respErr != nil {
+		return nil, respErr
+	}
+	return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, b, verbose)
+}
+
+func (s *Server) getInvokeFunctionParams(reqParams request.Params) (*transaction.Transaction, bool, *response.Error) {
+	if len(reqParams) < 2 {
+		return nil, false, response.ErrInvalidParams
+	}
 	scriptHash, responseErr := s.contractScriptHashFromParam(reqParams.Value(0))
 	if responseErr != nil {
-		return nil, responseErr
+		return nil, false, responseErr
 	}
 	method, err := reqParams[1].GetString()
 	if err != nil {
-		return nil, response.ErrInvalidParams
+		return nil, false, response.ErrInvalidParams
 	}
 	var params *request.Param
 	if len(reqParams) > 2 {
@@ -1590,7 +1618,7 @@ func (s *Server) invokeFunction(reqParams request.Params) (interface{}, *respons
 	if len(reqParams) > 3 {
 		signers, _, err := reqParams[3].GetSignersWithWitnesses()
 		if err != nil {
-			return nil, response.ErrInvalidParams
+			return nil, false, response.ErrInvalidParams
 		}
 		tx.Signers = signers
 	}
@@ -1598,7 +1626,7 @@ func (s *Server) invokeFunction(reqParams request.Params) (interface{}, *respons
 	if len(reqParams) > 4 {
 		verbose, err = reqParams[4].GetBoolean()
 		if err != nil {
-			return nil, response.ErrInvalidParams
+			return nil, false, response.ErrInvalidParams
 		}
 	}
 	if len(tx.Signers) == 0 {
@@ -1606,28 +1634,48 @@ func (s *Server) invokeFunction(reqParams request.Params) (interface{}, *respons
 	}
 	script, err := request.CreateFunctionInvocationScript(scriptHash, method, params)
 	if err != nil {
-		return nil, response.NewInternalServerError("can't create invocation script", err)
+		return nil, false, response.NewInternalServerError("can't create invocation script", err)
 	}
 	tx.Script = script
-	return s.runScriptInVM(trigger.Application, script, util.Uint160{}, tx, verbose)
+	return tx, verbose, nil
 }
 
 // invokescript implements the `invokescript` RPC call.
 func (s *Server) invokescript(reqParams request.Params) (interface{}, *response.Error) {
-	if len(reqParams) < 1 {
+	tx, verbose, respErr := s.getInvokeScriptParams(reqParams)
+	if respErr != nil {
+		return nil, respErr
+	}
+	return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, nil, verbose)
+}
+
+// invokescripthistoric implements the `invokescripthistoric` RPC call.
+func (s *Server) invokescripthistoric(reqParams request.Params) (interface{}, *response.Error) {
+	b, respErr := s.getHistoricParams(reqParams)
+	if respErr != nil {
+		return nil, respErr
+	}
+	if len(reqParams) < 2 {
 		return nil, response.ErrInvalidParams
 	}
+	tx, verbose, respErr := s.getInvokeScriptParams(reqParams[1:])
+	if respErr != nil {
+		return nil, respErr
+	}
+	return s.runScriptInVM(trigger.Application, tx.Script, util.Uint160{}, tx, b, verbose)
+}
 
-	script, err := reqParams[0].GetBytesBase64()
+func (s *Server) getInvokeScriptParams(reqParams request.Params) (*transaction.Transaction, bool, *response.Error) {
+	script, err := reqParams.Value(0).GetBytesBase64()
 	if err != nil {
-		return nil, response.ErrInvalidParams
+		return nil, false, response.ErrInvalidParams
 	}
 
 	tx := &transaction.Transaction{}
 	if len(reqParams) > 1 {
 		signers, witnesses, err := reqParams[1].GetSignersWithWitnesses()
 		if err != nil {
-			return nil, response.ErrInvalidParams
+			return nil, false, response.ErrInvalidParams
 		}
 		tx.Signers = signers
 		tx.Scripts = witnesses
@@ -1636,33 +1684,57 @@ func (s *Server) invokescript(reqParams request.Params) (interface{}, *response.
 	if len(reqParams) > 2 {
 		verbose, err = reqParams[2].GetBoolean()
 		if err != nil {
-			return nil, response.ErrInvalidParams
+			return nil, false, response.ErrInvalidParams
 		}
 	}
 	if len(tx.Signers) == 0 {
 		tx.Signers = []transaction.Signer{{Account: util.Uint160{}, Scopes: transaction.None}}
 	}
 	tx.Script = script
-	return s.runScriptInVM(trigger.Application, script, util.Uint160{}, tx, verbose)
+	return tx, verbose, nil
 }
 
 // invokeContractVerify implements the `invokecontractverify` RPC call.
 func (s *Server) invokeContractVerify(reqParams request.Params) (interface{}, *response.Error) {
+	scriptHash, tx, invocationScript, respErr := s.getInvokeContractVerifyParams(reqParams)
+	if respErr != nil {
+		return nil, respErr
+	}
+	return s.runScriptInVM(trigger.Verification, invocationScript, scriptHash, tx, nil, false)
+}
+
+// invokeContractVerifyHistoric implements the `invokecontractverifyhistoric` RPC call.
+func (s *Server) invokeContractVerifyHistoric(reqParams request.Params) (interface{}, *response.Error) {
+	b, respErr := s.getHistoricParams(reqParams)
+	if respErr != nil {
+		return nil, respErr
+	}
+	if len(reqParams) < 2 {
+		return nil, response.ErrInvalidParams
+	}
+	scriptHash, tx, invocationScript, respErr := s.getInvokeContractVerifyParams(reqParams[1:])
+	if respErr != nil {
+		return nil, respErr
+	}
+	return s.runScriptInVM(trigger.Verification, invocationScript, scriptHash, tx, b, false)
+}
+
+func (s *Server) getInvokeContractVerifyParams(reqParams request.Params) (util.Uint160, *transaction.Transaction, []byte, *response.Error) {
 	scriptHash, responseErr := s.contractScriptHashFromParam(reqParams.Value(0))
 	if responseErr != nil {
-		return nil, responseErr
+		return util.Uint160{}, nil, nil, responseErr
 	}
 
 	bw := io.NewBufBinWriter()
 	if len(reqParams) > 1 {
 		args, err := reqParams[1].GetArray() // second `invokecontractverify` parameter is an array of arguments for `verify` method
 		if err != nil {
-			return nil, response.WrapErrorWithData(response.ErrInvalidParams, err)
+			return util.Uint160{}, nil, nil, response.WrapErrorWithData(response.ErrInvalidParams, err)
 		}
 		if len(args) > 0 {
 			err := request.ExpandArrayIntoScript(bw.BinWriter, args)
 			if err != nil {
-				return nil, response.NewRPCError("can't create witness invocation script", err.Error(), err)
+				return util.Uint160{}, nil, nil, response.NewRPCError("can't create witness invocation script", err.Error(), err)
 			}
 		}
 	}
@@ -1672,7 +1744,7 @@ func (s *Server) invokeContractVerify(reqParams request.Params) (interface{}, *r
 	if len(reqParams) > 2 {
 		signers, witnesses, err := reqParams[2].GetSignersWithWitnesses()
 		if err != nil {
-			return nil, response.ErrInvalidParams
+			return util.Uint160{}, nil, nil, response.ErrInvalidParams
 		}
 		tx.Signers = signers
 		tx.Scripts = witnesses
@@ -1680,16 +1752,51 @@ func (s *Server) invokeContractVerify(reqParams request.Params) (interface{}, *r
 		tx.Signers = []transaction.Signer{{Account: scriptHash}}
 		tx.Scripts = []transaction.Witness{{InvocationScript: invocationScript, VerificationScript: []byte{}}}
 	}
-	return s.runScriptInVM(trigger.Verification, invocationScript, scriptHash, tx, false)
+	return scriptHash, tx, invocationScript, nil
 }
 
-func (s *Server) getFakeNextBlock() (*block.Block, error) {
+// getHistoricParams checks that historic calls are supported and returns fake block
+// with the specified index to perform the historic call. It also checks that
+// specified stateroot is stored at the specified height for further request
+// handling consistency.
+func (s *Server) getHistoricParams(reqParams request.Params) (*block.Block, *response.Error) {
+	if s.chain.GetConfig().KeepOnlyLatestState {
+		return nil, response.NewInvalidRequestError("only latest state is supported", errKeepOnlyLatestState)
+	}
+	if len(reqParams) < 1 {
+		return nil, response.ErrInvalidParams
+	}
+	height, respErr := s.blockHeightFromParam(reqParams.Value(0))
+	if respErr != nil {
+		hash, err := reqParams.Value(0).GetUint256()
+		if err != nil {
+			return nil, response.NewInvalidParamsError("invalid block hash or index or stateroot hash", err)
+		}
+		b, err := s.chain.GetBlock(hash)
+		if err != nil {
+			stateH, err := s.chain.GetStateModule().GetLatestStateHeight(hash)
+			if err != nil {
+				return nil, response.NewInvalidParamsError(fmt.Sprintf("unknown block or stateroot: %s", err), err)
+			}
+			height = int(stateH)
+		} else {
+			height = int(b.Index)
+		}
+	}
+	b, err := s.getFakeNextBlock(uint32(height))
+	if err != nil {
+		return nil, response.NewInternalServerError(fmt.Sprintf("can't create fake block for height %d: %s", height, err.Error()), err)
+	}
+	return b, nil
+}
+
+func (s *Server) getFakeNextBlock(nextBlockHeight uint32) (*block.Block, error) {
 	// When transferring funds, script execution does no auto GAS claim,
 	// because it depends on persisting tx height.
 	// This is why we provide block here.
 	b := block.New(s.stateRootEnabled)
-	b.Index = s.chain.BlockHeight() + 1
+	b.Index = nextBlockHeight
-	hdr, err := s.chain.GetHeader(s.chain.GetHeaderHash(int(s.chain.BlockHeight())))
+	hdr, err := s.chain.GetHeader(s.chain.GetHeaderHash(int(nextBlockHeight - 1)))
 	if err != nil {
 		return nil, err
 	}
@@ -1702,12 +1809,23 @@ func (s *Server) getFakeNextBlock() (*block.Block, error) {
 // witness invocation script in case of `verification` trigger (it pushes `verify`
 // arguments on stack before verification). In case of contract verification
 // contractScriptHash should be specified.
-func (s *Server) runScriptInVM(t trigger.Type, script []byte, contractScriptHash util.Uint160, tx *transaction.Transaction, verbose bool) (*result.Invoke, *response.Error) {
+func (s *Server) runScriptInVM(t trigger.Type, script []byte, contractScriptHash util.Uint160, tx *transaction.Transaction, b *block.Block, verbose bool) (*result.Invoke, *response.Error) {
-	b, err := s.getFakeNextBlock()
+	var (
-	if err != nil {
+		err error
-		return nil, response.NewInternalServerError("can't create fake block", err)
+		ic  *interop.Context
+	)
+	if b == nil {
+		b, err = s.getFakeNextBlock(s.chain.BlockHeight() + 1)
+		if err != nil {
+			return nil, response.NewInternalServerError("can't create fake block", err)
+		}
+		ic = s.chain.GetTestVM(t, tx, b)
+	} else {
+		ic, err = s.chain.GetTestHistoricVM(t, tx, b)
+		if err != nil {
+			return nil, response.NewInternalServerError("failed to create historic VM", err)
+		}
 	}
-	ic := s.chain.GetTestVM(t, tx, b)
 	if verbose {
 		ic.VM.EnableInvocationTree()
 	}
@@ -1720,9 +1838,9 @@ func (s *Server) runScriptInVM(t trigger.Type, script []byte, contractScriptHash
 			ic.VM.GasLimit = gasPolicy
 		}
 
-		err := s.chain.InitVerificationContext(ic, contractScriptHash, &transaction.Witness{InvocationScript: script, VerificationScript: []byte{}})
+		err = s.chain.InitVerificationContext(ic, contractScriptHash, &transaction.Witness{InvocationScript: script, VerificationScript: []byte{}})
 		if err != nil {
-			return nil, response.NewInternalServerError("can't prepare verification VM", err)
+			return nil, response.NewInternalServerError(fmt.Sprintf("can't prepare verification VM: %s", err.Error()), err)
 		}
 	} else {
 		ic.VM.LoadScriptWithFlags(script, callflag.All)

pkg/rpc/server/server_test.go

@@ -75,6 +75,7 @@ const (
 	nfsoContractHash           = "5f9ebd6b001b54c7bc70f96e0412fcf415dfe09f"
 	nfsoToken1ID               = "7e244ffd6aa85fb1579d2ed22e9b761ab62e3486"
 	invokescriptContractAVM    = "VwIADBQBDAMOBQYMDQIODw0DDgcJAAAAAErZMCQE2zBwaEH4J+yMqiYEEUAMFA0PAwIJAAIBAwcDBAUCAQAOBgwJStkwJATbMHFpQfgn7IyqJgQSQBNA"
+	block20StateRootLE         = "19ec3c3d01afe5274e8bb4a393c97da708c5608c5b0ad116c16108b6a04fb08e"
 )
 
 var (
@@ -999,6 +1000,134 @@ var rpcTestCases = map[string][]rpcTestCase{
 			fail:   true,
 		},
 	},
+	"invokefunctionhistoric": {
+		{
+			name:   "positive, by index",
+			params: `[20, "50befd26fdf6e4d957c11e078b24ebce6291456f", "test", []]`,
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.NotNil(t, res.Script)
+				assert.NotEqual(t, "", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+			},
+		},
+		{
+			name:   "positive, by stateroot",
+			params: `["` + block20StateRootLE + `", "50befd26fdf6e4d957c11e078b24ebce6291456f", "test", []]`,
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.NotNil(t, res.Script)
+				assert.NotEqual(t, "", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+			},
+		},
+		{
+			name:   "positive, with notifications",
+			params: `[20, "` + nnsContractHash + `", "transfer", [{"type":"Hash160", "value":"0x0bcd2978634d961c24f5aea0802297ff128724d6"},{"type":"String", "value":"neo.com"},{"type":"Any", "value":null}],["0xb248508f4ef7088e10c48f14d04be3272ca29eee"]]`,
+			result: func(e *executor) interface{} {
+				script := []byte{0x0b, 0x0c, 0x07, 0x6e, 0x65, 0x6f, 0x2e, 0x63, 0x6f, 0x6d, 0x0c, 0x14, 0xd6, 0x24, 0x87, 0x12, 0xff, 0x97, 0x22, 0x80, 0xa0, 0xae, 0xf5, 0x24, 0x1c, 0x96, 0x4d, 0x63, 0x78, 0x29, 0xcd, 0xb, 0x13, 0xc0, 0x1f, 0xc, 0x8, 0x74, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x65, 0x72, 0xc, 0x14, 0x1f, 0xe2, 0x37, 0x5c, 0xdc, 0xdb, 0xb2, 0x80, 0x40, 0x78, 0x65, 0x35, 0xd5, 0xef, 0xe4, 0x3, 0x39, 0x56, 0x92, 0xee, 0x41, 0x62, 0x7d, 0x5b, 0x52}
+				return &result.Invoke{
+					State:       "HALT",
+					GasConsumed: 32167260,
+					Script:      script,
+					Stack:       []stackitem.Item{stackitem.Make(true)},
+					Notifications: []state.NotificationEvent{{
+						ScriptHash: nnsHash,
+						Name:       "Transfer",
+						Item: stackitem.NewArray([]stackitem.Item{
+							stackitem.Make([]byte{0xee, 0x9e, 0xa2, 0x2c, 0x27, 0xe3, 0x4b, 0xd0, 0x14, 0x8f, 0xc4, 0x10, 0x8e, 0x08, 0xf7, 0x4e, 0x8f, 0x50, 0x48, 0xb2}),
+							stackitem.Make([]byte{0xd6, 0x24, 0x87, 0x12, 0xff, 0x97, 0x22, 0x80, 0xa0, 0xae, 0xf5, 0x24, 0x1c, 0x96, 0x4d, 0x63, 0x78, 0x29, 0xcd, 0x0b}),
+							stackitem.Make(1),
+							stackitem.Make("neo.com"),
+						}),
+					}},
+				}
+			},
+		},
+		{
+			name:   "positive, verbose",
+			params: `[20, "` + nnsContractHash + `", "resolve", [{"type":"String", "value":"neo.com"},{"type":"Integer","value":1}], [], true]`,
+			result: func(e *executor) interface{} {
+				script := []byte{0x11, 0xc, 0x7, 0x6e, 0x65, 0x6f, 0x2e, 0x63, 0x6f, 0x6d, 0x12, 0xc0, 0x1f, 0xc, 0x7, 0x72, 0x65, 0x73, 0x6f, 0x6c, 0x76, 0x65, 0xc, 0x14, 0x1f, 0xe2, 0x37, 0x5c, 0xdc, 0xdb, 0xb2, 0x80, 0x40, 0x78, 0x65, 0x35, 0xd5, 0xef, 0xe4, 0x3, 0x39, 0x56, 0x92, 0xee, 0x41, 0x62, 0x7d, 0x5b, 0x52}
+				stdHash, _ := e.chain.GetNativeContractScriptHash(nativenames.StdLib)
+				cryptoHash, _ := e.chain.GetNativeContractScriptHash(nativenames.CryptoLib)
+				return &result.Invoke{
+					State:         "HALT",
+					GasConsumed:   15928320,
+					Script:        script,
+					Stack:         []stackitem.Item{stackitem.Make("1.2.3.4")},
+					Notifications: []state.NotificationEvent{},
+					Diagnostics: &result.InvokeDiag{
+						Changes: []storage.Operation{},
+						Invocations: []*vm.InvocationTree{{
+							Current: hash.Hash160(script),
+							Calls: []*vm.InvocationTree{
+								{
+									Current: nnsHash,
+									Calls: []*vm.InvocationTree{
+										{
+											Current: stdHash,
+										},
+										{
+											Current: cryptoHash,
+										},
+										{
+											Current: stdHash,
+										},
+										{
+											Current: cryptoHash,
+										},
+										{
+											Current: cryptoHash,
+										},
+									},
+								},
+							},
+						}},
+					},
+				}
+			},
+		},
+		{
+			name:   "no params",
+			params: `[]`,
+			fail:   true,
+		},
+		{
+			name:   "no args",
+			params: `[20]`,
+			fail:   true,
+		},
+		{
+			name:   "not a string",
+			params: `[20, 42, "test", []]`,
+			fail:   true,
+		},
+		{
+			name:   "not a scripthash",
+			params: `[20,"qwerty", "test", []]`,
+			fail:   true,
+		},
+		{
+			name:   "bad params",
+			params: `[20,"50befd26fdf6e4d957c11e078b24ebce6291456f", "test", [{"type": "Integer", "value": "qwerty"}]]`,
+			fail:   true,
+		},
+		{
+			name:   "bad height",
+			params: `[100500,"50befd26fdf6e4d957c11e078b24ebce6291456f", "test", [{"type": "Integer", "value": 1}]]`,
+			fail:   true,
+		},
+		{
+			name:   "bad stateroot",
+			params: `["` + util.Uint256{1, 2, 3}.StringLE() + `","50befd26fdf6e4d957c11e078b24ebce6291456f", "test", [{"type": "Integer", "value": 1}]]`,
+			fail:   true,
+		},
+	},
 	"invokescript": {
 		{
 			name:   "positive",
@@ -1098,6 +1227,132 @@ var rpcTestCases = map[string][]rpcTestCase{
 			fail:   true,
 		},
 	},
+	"invokescripthistoric": {
+		{
+			name:   "positive, by index",
+			params: `[20,"UcVrDUhlbGxvLCB3b3JsZCFoD05lby5SdW50aW1lLkxvZ2FsdWY="]`,
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.NotEqual(t, "", res.Script)
+				assert.NotEqual(t, "", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+			},
+		},
+		{
+			name:   "positive, by stateroot",
+			params: `["` + block20StateRootLE + `","UcVrDUhlbGxvLCB3b3JsZCFoD05lby5SdW50aW1lLkxvZ2FsdWY="]`,
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.NotEqual(t, "", res.Script)
+				assert.NotEqual(t, "", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+			},
+		},
+		{
+			name:   "positive,verbose",
+			params: `[20, "UcVrDUhlbGxvLCB3b3JsZCFoD05lby5SdW50aW1lLkxvZ2FsdWY=",[],true]`,
+			result: func(e *executor) interface{} {
+				script := []byte{0x51, 0xc5, 0x6b, 0xd, 0x48, 0x65, 0x6c, 0x6c, 0x6f, 0x2c, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64, 0x21, 0x68, 0xf, 0x4e, 0x65, 0x6f, 0x2e, 0x52, 0x75, 0x6e, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x4c, 0x6f, 0x67, 0x61, 0x6c, 0x75, 0x66}
+				return &result.Invoke{
+					State:          "FAULT",
+					GasConsumed:    60,
+					Script:         script,
+					Stack:          []stackitem.Item{},
+					FaultException: "at instruction 0 (ROT): too big index",
+					Notifications:  []state.NotificationEvent{},
+					Diagnostics: &result.InvokeDiag{
+						Changes: []storage.Operation{},
+						Invocations: []*vm.InvocationTree{{
+							Current: hash.Hash160(script),
+						}},
+					},
+				}
+			},
+		},
+		{
+			name: "positive, good witness",
+			// script is base64-encoded `invokescript_contract.avm` representation, hashes are hex-encoded LE bytes of hashes used in the contract with `0x` prefix
+			params: fmt.Sprintf(`[20,"%s",["0x0000000009070e030d0f0e020d0c06050e030c01","0x090c060e00010205040307030102000902030f0d"]]`, invokescriptContractAVM),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Equal(t, "HALT", res.State)
+				require.Equal(t, 1, len(res.Stack))
+				require.Equal(t, big.NewInt(3), res.Stack[0].Value())
+			},
+		},
+		{
+			name:   "positive, bad witness of second hash",
+			params: fmt.Sprintf(`[20,"%s",["0x0000000009070e030d0f0e020d0c06050e030c01"]]`, invokescriptContractAVM),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Equal(t, "HALT", res.State)
+				require.Equal(t, 1, len(res.Stack))
+				require.Equal(t, big.NewInt(2), res.Stack[0].Value())
+			},
+		},
+		{
+			name:   "positive, no good hashes",
+			params: fmt.Sprintf(`[20,"%s"]`, invokescriptContractAVM),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Equal(t, "HALT", res.State)
+				require.Equal(t, 1, len(res.Stack))
+				require.Equal(t, big.NewInt(1), res.Stack[0].Value())
+			},
+		},
+		{
+			name:   "positive, bad hashes witness",
+			params: fmt.Sprintf(`[20,"%s",["0x0000000009070e030d0f0e020d0c06050e030c02"]]`, invokescriptContractAVM),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Equal(t, "HALT", res.State)
+				assert.Equal(t, 1, len(res.Stack))
+				assert.Equal(t, big.NewInt(1), res.Stack[0].Value())
+			},
+		},
+		{
+			name:   "no params",
+			params: `[]`,
+			fail:   true,
+		},
+		{
+			name:   "no script",
+			params: `[20]`,
+			fail:   true,
+		},
+		{
+			name:   "not a string",
+			params: `[20,42]`,
+			fail:   true,
+		},
+		{
+			name:   "bas string",
+			params: `[20, "qwerty"]`,
+			fail:   true,
+		},
+		{
+			name:   "bas height",
+			params: `[100500,"qwerty"]`,
+			fail:   true,
+		},
+		{
+			name:   "bas stateroot",
+			params: `["` + util.Uint256{1, 2, 3}.StringLE() + `","UcVrDUhlbGxvLCB3b3JsZCFoD05lby5SdW50aW1lLkxvZ2FsdWY="]`,
+			fail:   true,
+		},
+	},
 	"invokecontractverify": {
 		{
 			name:   "positive",
@@ -1203,6 +1458,129 @@ var rpcTestCases = map[string][]rpcTestCase{
 			fail:   true,
 		},
 	},
+	"invokecontractverifyhistoric": {
+		{
+			name:   "positive, by index",
+			params: fmt.Sprintf(`[20,"%s", [], [{"account":"%s"}]]`, verifyContractHash, testchain.PrivateKeyByID(0).PublicKey().GetScriptHash().StringLE()),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Nil(t, res.Script) // empty witness invocation script (pushes args of `verify` on stack, but this `verify` don't have args)
+				assert.Equal(t, "HALT", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, true, res.Stack[0].Value().(bool), fmt.Sprintf("check address in verification_contract.go: expected %s", testchain.PrivateKeyByID(0).Address()))
+			},
+		},
+		{
+			name:   "positive, by stateroot",
+			params: fmt.Sprintf(`["`+block20StateRootLE+`","%s", [], [{"account":"%s"}]]`, verifyContractHash, testchain.PrivateKeyByID(0).PublicKey().GetScriptHash().StringLE()),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Nil(t, res.Script) // empty witness invocation script (pushes args of `verify` on stack, but this `verify` don't have args)
+				assert.Equal(t, "HALT", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, true, res.Stack[0].Value().(bool), fmt.Sprintf("check address in verification_contract.go: expected %s", testchain.PrivateKeyByID(0).Address()))
+			},
+		},
+		{
+			name:   "positive, no signers",
+			params: fmt.Sprintf(`[20,"%s", []]`, verifyContractHash),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Nil(t, res.Script)
+				assert.Equal(t, "HALT", res.State, res.FaultException)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, false, res.Stack[0].Value().(bool))
+			},
+		},
+		{
+			name:   "positive, no arguments",
+			params: fmt.Sprintf(`[20,"%s"]`, verifyContractHash),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Nil(t, res.Script)
+				assert.Equal(t, "HALT", res.State, res.FaultException)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, false, res.Stack[0].Value().(bool))
+			},
+		},
+		{
+			name:   "positive, with signers and scripts",
+			params: fmt.Sprintf(`[20,"%s", [], [{"account":"%s", "invocation":"MQo=", "verification": ""}]]`, verifyContractHash, testchain.PrivateKeyByID(0).PublicKey().GetScriptHash().StringLE()),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				assert.Nil(t, res.Script)
+				assert.Equal(t, "HALT", res.State)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, true, res.Stack[0].Value().(bool))
+			},
+		},
+		{
+			name:   "positive, with arguments, result=true",
+			params: fmt.Sprintf(`[20,"%s", [{"type": "String", "value": "good_string"}, {"type": "Integer", "value": "4"}, {"type":"Boolean", "value": false}]]`, verifyWithArgsContractHash),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				expectedInvScript := io.NewBufBinWriter()
+				emit.Int(expectedInvScript.BinWriter, 0)
+				emit.Int(expectedInvScript.BinWriter, int64(4))
+				emit.String(expectedInvScript.BinWriter, "good_string")
+				require.NoError(t, expectedInvScript.Err)
+				assert.Equal(t, expectedInvScript.Bytes(), res.Script) // witness invocation script (pushes args of `verify` on stack)
+				assert.Equal(t, "HALT", res.State, res.FaultException)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, true, res.Stack[0].Value().(bool))
+			},
+		},
+		{
+			name:   "positive, with arguments, result=false",
+			params: fmt.Sprintf(`[20, "%s", [{"type": "String", "value": "invalid_string"}, {"type": "Integer", "value": "4"}, {"type":"Boolean", "value": false}]]`, verifyWithArgsContractHash),
+			result: func(e *executor) interface{} { return &result.Invoke{} },
+			check: func(t *testing.T, e *executor, inv interface{}) {
+				res, ok := inv.(*result.Invoke)
+				require.True(t, ok)
+				expectedInvScript := io.NewBufBinWriter()
+				emit.Int(expectedInvScript.BinWriter, 0)
+				emit.Int(expectedInvScript.BinWriter, int64(4))
+				emit.String(expectedInvScript.BinWriter, "invalid_string")
+				require.NoError(t, expectedInvScript.Err)
+				assert.Equal(t, expectedInvScript.Bytes(), res.Script)
+				assert.Equal(t, "HALT", res.State, res.FaultException)
+				assert.NotEqual(t, 0, res.GasConsumed)
+				assert.Equal(t, false, res.Stack[0].Value().(bool))
+			},
+		},
+		{
+			name:   "unknown contract",
+			params: fmt.Sprintf(`[20, "%s", []]`, util.Uint160{}.String()),
+			fail:   true,
+		},
+		{
+			name:   "no params",
+			params: `[]`,
+			fail:   true,
+		},
+		{
+			name:   "no args",
+			params: `[20]`,
+			fail:   true,
+		},
+		{
+			name:   "not a string",
+			params: `[20,42, []]`,
+			fail:   true,
+		},
+	},
 	"sendrawtransaction": {
 		{
 			name:   "positive",