diff --git a/pkg/consensus/consensus.go b/pkg/consensus/consensus.go
index 25b16b7c7..e22deaf8f 100644
--- a/pkg/consensus/consensus.go
+++ b/pkg/consensus/consensus.go
@@ -12,6 +12,7 @@ import (
 	"github.com/nspcc-dev/dbft/payload"
 	"github.com/nspcc-dev/neo-go/pkg/core"
 	coreb "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/mempool"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
@@ -77,7 +78,7 @@ type Config struct {
 	// about the new block that needs to be broadcasted.
 	RelayBlock func(b *coreb.Block)
 	// Chain is a core.Blockchainer instance.
-	Chain core.Blockchainer
+	Chain blockchainer.Blockchainer
 	// RequestTx is a callback to which will be called
 	// when a node lacks transactions present in a block.
 	RequestTx func(h ...util.Uint256)
diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index c9e82bf3e..e02d96d77 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -12,6 +12,7 @@ import (
 	"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/interop"
 	"github.com/nspcc-dev/neo-go/pkg/core/mempool"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/storage"
@@ -446,7 +447,7 @@ func (bc *Blockchain) processHeader(h *block.Header, batch storage.Batch, header
 	return nil
 }
 
-// bc.GetHeaderHash(int(endHeight)) returns sum of all system fees for blocks up to h.
+// getSystemFeeAmount returns sum of all system fees for blocks up to h.
 // and 0 if no such block exists.
 func (bc *Blockchain) getSystemFeeAmount(h util.Uint256) uint32 {
 	_, sf, _ := bc.dao.GetBlock(h)
@@ -657,7 +658,7 @@ func (bc *Blockchain) storeBlock(block *block.Block) error {
 			}
 		case *transaction.InvocationTX:
 			systemInterop := bc.newInteropContext(trigger.Application, cache, block, tx)
-			v := systemInterop.SpawnVM()
+			v := SpawnVM(systemInterop)
 			v.SetCheckedHash(tx.VerificationHash().BytesBE())
 			v.LoadScript(t.Script)
 			v.SetPriceGetter(getPrice)
@@ -667,11 +668,11 @@ func (bc *Blockchain) storeBlock(block *block.Block) error {
 
 			err := v.Run()
 			if !v.HasFailed() {
-				_, err := systemInterop.dao.Persist()
+				_, err := systemInterop.DAO.Persist()
 				if err != nil {
 					return errors.Wrap(err, "failed to persist invocation results")
 				}
-				for _, note := range systemInterop.notifications {
+				for _, note := range systemInterop.Notifications {
 					arr, ok := note.Item.Value().([]vm.StackItem)
 					if !ok || len(arr) != 4 {
 						continue
@@ -710,7 +711,7 @@ func (bc *Blockchain) storeBlock(block *block.Block) error {
 				VMState:     v.State(),
 				GasConsumed: v.GasConsumed(),
 				Stack:       v.Estack().ToContractParameters(),
-				Events:      systemInterop.notifications,
+				Events:      systemInterop.Notifications,
 			}
 			err = cache.PutAppExecResult(aer)
 			if err != nil {
@@ -2002,7 +2003,7 @@ func (bc *Blockchain) GetScriptHashesForVerifying(t *transaction.Transaction) ([
 // GetTestVM returns a VM and a Store setup for a test run of some sort of code.
 func (bc *Blockchain) GetTestVM() *vm.VM {
 	systemInterop := bc.newInteropContext(trigger.Application, bc.dao, nil, nil)
-	vm := systemInterop.SpawnVM()
+	vm := SpawnVM(systemInterop)
 	vm.SetPriceGetter(getPrice)
 	return vm
 }
@@ -2024,13 +2025,13 @@ func ScriptFromWitness(hash util.Uint160, witness *transaction.Witness) ([]byte,
 }
 
 // verifyHashAgainstScript verifies given hash against the given witness.
-func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transaction.Witness, checkedHash util.Uint256, interopCtx *interopContext, useKeys bool) error {
+func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transaction.Witness, checkedHash util.Uint256, interopCtx *interop.Context, useKeys bool) error {
 	verification, err := ScriptFromWitness(hash, witness)
 	if err != nil {
 		return err
 	}
 
-	vm := interopCtx.SpawnVM()
+	vm := SpawnVM(interopCtx)
 	vm.SetCheckedHash(checkedHash.BytesBE())
 	vm.LoadScript(verification)
 	vm.LoadScript(witness.InvocationScript)
@@ -2124,6 +2125,6 @@ func (bc *Blockchain) secondsPerBlock() int {
 	return bc.config.SecondsPerBlock
 }
 
-func (bc *Blockchain) newInteropContext(trigger trigger.Type, d dao.DAO, block *block.Block, tx *transaction.Transaction) *interopContext {
-	return newInteropContext(trigger, bc, d, block, tx, bc.log)
+func (bc *Blockchain) newInteropContext(trigger trigger.Type, d dao.DAO, block *block.Block, tx *transaction.Transaction) *interop.Context {
+	return interop.NewContext(trigger, bc, d, block, tx, bc.log)
 }
diff --git a/pkg/core/blockchainer.go b/pkg/core/blockchainer/blockchainer.go
similarity index 99%
rename from pkg/core/blockchainer.go
rename to pkg/core/blockchainer/blockchainer.go
index a633bb523..1e368f90f 100644
--- a/pkg/core/blockchainer.go
+++ b/pkg/core/blockchainer/blockchainer.go
@@ -1,4 +1,4 @@
-package core
+package blockchainer
 
 import (
 	"github.com/nspcc-dev/neo-go/pkg/config"
diff --git a/pkg/core/gas_price_test.go b/pkg/core/gas_price_test.go
index a8bc2a52b..ba802f6f5 100644
--- a/pkg/core/gas_price_test.go
+++ b/pkg/core/gas_price_test.go
@@ -19,7 +19,7 @@ func TestGetPrice(t *testing.T) {
 	sdao := dao.NewSimple(storage.NewMemoryStore())
 	systemInterop := bc.newInteropContext(trigger.Application, sdao, nil, nil)
 
-	v := systemInterop.SpawnVM()
+	v := SpawnVM(systemInterop)
 	v.SetPriceGetter(getPrice)
 
 	t.Run("Neo.Asset.Create", func(t *testing.T) {
diff --git a/pkg/core/interop/context.go b/pkg/core/interop/context.go
new file mode 100644
index 000000000..6f9cfafc3
--- /dev/null
+++ b/pkg/core/interop/context.go
@@ -0,0 +1,48 @@
+package interop
+
+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/dao"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
+	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
+	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+	"go.uber.org/zap"
+)
+
+// Context represents context in which interops are executed.
+type Context struct {
+	Chain         blockchainer.Blockchainer
+	Trigger       trigger.Type
+	Block         *block.Block
+	Tx            *transaction.Transaction
+	DAO           *dao.Cached
+	Notifications []state.NotificationEvent
+	Log           *zap.Logger
+}
+
+// NewContext returns new interop context.
+func NewContext(trigger trigger.Type, bc blockchainer.Blockchainer, d dao.DAO, block *block.Block, tx *transaction.Transaction, log *zap.Logger) *Context {
+	dao := dao.NewCached(d)
+	nes := make([]state.NotificationEvent, 0)
+	return &Context{
+		Chain:         bc,
+		Trigger:       trigger,
+		Block:         block,
+		Tx:            tx,
+		DAO:           dao,
+		Notifications: nes,
+		Log:           log,
+	}
+}
+
+// Function binds function name, id with the function itself and price,
+// it's supposed to be inited once for all interopContexts, so it doesn't use
+// vm.InteropFuncPrice directly.
+type Function struct {
+	ID    uint32
+	Name  string
+	Func  func(*Context, *vm.VM) error
+	Price int
+}
diff --git a/pkg/core/interop/enumerator/interop.go b/pkg/core/interop/enumerator/interop.go
new file mode 100644
index 000000000..ecd90efad
--- /dev/null
+++ b/pkg/core/interop/enumerator/interop.go
@@ -0,0 +1,27 @@
+package enumerator
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+)
+
+// Concat concatenates 2 enumerators into a single one.
+func Concat(_ *interop.Context, v *vm.VM) error {
+	return vm.EnumeratorConcat(v)
+}
+
+// Create creates an enumerator from an array-like stack item.
+func Create(_ *interop.Context, v *vm.VM) error {
+	return vm.EnumeratorCreate(v)
+}
+
+// Next advances the enumerator, pushes true if is it was successful
+// and false otherwise.
+func Next(_ *interop.Context, v *vm.VM) error {
+	return vm.EnumeratorNext(v)
+}
+
+// Value returns the current value of the enumerator.
+func Value(_ *interop.Context, v *vm.VM) error {
+	return vm.EnumeratorValue(v)
+}
diff --git a/pkg/core/interop/iterator/interop.go b/pkg/core/interop/iterator/interop.go
new file mode 100644
index 000000000..f04dfa942
--- /dev/null
+++ b/pkg/core/interop/iterator/interop.go
@@ -0,0 +1,31 @@
+package iterator
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+)
+
+// Concat concatenates 2 iterators into a single one.
+func Concat(_ *interop.Context, v *vm.VM) error {
+	return vm.IteratorConcat(v)
+}
+
+// Create creates an iterator from array-like or map stack item.
+func Create(_ *interop.Context, v *vm.VM) error {
+	return vm.IteratorCreate(v)
+}
+
+// Key returns current iterator key.
+func Key(_ *interop.Context, v *vm.VM) error {
+	return vm.IteratorKey(v)
+}
+
+// Keys returns keys of the iterator.
+func Keys(_ *interop.Context, v *vm.VM) error {
+	return vm.IteratorKeys(v)
+}
+
+// Values returns values of the iterator.
+func Values(_ *interop.Context, v *vm.VM) error {
+	return vm.IteratorValues(v)
+}
diff --git a/pkg/core/interop_neo.go b/pkg/core/interop_neo.go
index 277e06620..378214447 100644
--- a/pkg/core/interop_neo.go
+++ b/pkg/core/interop_neo.go
@@ -6,6 +6,7 @@ import (
 	"math"
 	"strings"
 
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
@@ -37,7 +38,7 @@ const (
 )
 
 // headerGetVersion returns version from the header.
-func (ic *interopContext) headerGetVersion(v *vm.VM) error {
+func headerGetVersion(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -47,7 +48,7 @@ func (ic *interopContext) headerGetVersion(v *vm.VM) error {
 }
 
 // headerGetConsensusData returns consensus data from the header.
-func (ic *interopContext) headerGetConsensusData(v *vm.VM) error {
+func headerGetConsensusData(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -57,7 +58,7 @@ func (ic *interopContext) headerGetConsensusData(v *vm.VM) error {
 }
 
 // headerGetMerkleRoot returns version from the header.
-func (ic *interopContext) headerGetMerkleRoot(v *vm.VM) error {
+func headerGetMerkleRoot(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -67,7 +68,7 @@ func (ic *interopContext) headerGetMerkleRoot(v *vm.VM) error {
 }
 
 // headerGetNextConsensus returns version from the header.
-func (ic *interopContext) headerGetNextConsensus(v *vm.VM) error {
+func headerGetNextConsensus(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -77,7 +78,7 @@ func (ic *interopContext) headerGetNextConsensus(v *vm.VM) error {
 }
 
 // txGetAttributes returns current transaction attributes.
-func (ic *interopContext) txGetAttributes(v *vm.VM) error {
+func txGetAttributes(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -95,7 +96,7 @@ func (ic *interopContext) txGetAttributes(v *vm.VM) error {
 }
 
 // txGetInputs returns current transaction inputs.
-func (ic *interopContext) txGetInputs(v *vm.VM) error {
+func txGetInputs(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -113,7 +114,7 @@ func (ic *interopContext) txGetInputs(v *vm.VM) error {
 }
 
 // txGetOutputs returns current transaction outputs.
-func (ic *interopContext) txGetOutputs(v *vm.VM) error {
+func txGetOutputs(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -131,13 +132,13 @@ func (ic *interopContext) txGetOutputs(v *vm.VM) error {
 }
 
 // txGetReferences returns current transaction references.
-func (ic *interopContext) txGetReferences(v *vm.VM) error {
+func txGetReferences(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
 		return fmt.Errorf("type mismatch: %T is not a Transaction", txInterface)
 	}
-	refs, err := ic.bc.References(tx)
+	refs, err := ic.Chain.References(tx)
 	if err != nil {
 		return err
 	}
@@ -159,7 +160,7 @@ func (ic *interopContext) txGetReferences(v *vm.VM) error {
 }
 
 // txGetType returns current transaction type.
-func (ic *interopContext) txGetType(v *vm.VM) error {
+func txGetType(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -170,13 +171,13 @@ func (ic *interopContext) txGetType(v *vm.VM) error {
 }
 
 // txGetUnspentCoins returns current transaction unspent coins.
-func (ic *interopContext) txGetUnspentCoins(v *vm.VM) error {
+func txGetUnspentCoins(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
 		return errors.New("value is not a transaction")
 	}
-	ucs, err := ic.dao.GetUnspentCoinState(tx.Hash())
+	ucs, err := ic.DAO.GetUnspentCoinState(tx.Hash())
 	if err != nil {
 		return errors.New("no unspent coin state found")
 	}
@@ -185,7 +186,7 @@ func (ic *interopContext) txGetUnspentCoins(v *vm.VM) error {
 }
 
 // txGetWitnesses returns current transaction witnesses.
-func (ic *interopContext) txGetWitnesses(v *vm.VM) error {
+func txGetWitnesses(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -203,7 +204,7 @@ func (ic *interopContext) txGetWitnesses(v *vm.VM) error {
 }
 
 // invocationTx_GetScript returns invocation script from the current transaction.
-func (ic *interopContext) invocationTxGetScript(v *vm.VM) error {
+func invocationTxGetScript(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -221,7 +222,7 @@ func (ic *interopContext) invocationTxGetScript(v *vm.VM) error {
 }
 
 // witnessGetVerificationScript returns current witness' script.
-func (ic *interopContext) witnessGetVerificationScript(v *vm.VM) error {
+func witnessGetVerificationScript(ic *interop.Context, v *vm.VM) error {
 	witInterface := v.Estack().Pop().Value()
 	wit, ok := witInterface.(*transaction.Witness)
 	if !ok {
@@ -235,8 +236,8 @@ func (ic *interopContext) witnessGetVerificationScript(v *vm.VM) error {
 }
 
 // bcGetValidators returns validators.
-func (ic *interopContext) bcGetValidators(v *vm.VM) error {
-	validators := ic.dao.GetValidators()
+func bcGetValidators(ic *interop.Context, v *vm.VM) error {
+	validators := ic.DAO.GetValidators()
 	v.Estack().PushVal(validators)
 	return nil
 }
@@ -256,7 +257,7 @@ func popInputFromVM(v *vm.VM) (*transaction.Input, error) {
 }
 
 // inputGetHash returns hash from the given input.
-func (ic *interopContext) inputGetHash(v *vm.VM) error {
+func inputGetHash(ic *interop.Context, v *vm.VM) error {
 	input, err := popInputFromVM(v)
 	if err != nil {
 		return err
@@ -266,7 +267,7 @@ func (ic *interopContext) inputGetHash(v *vm.VM) error {
 }
 
 // inputGetIndex returns index from the given input.
-func (ic *interopContext) inputGetIndex(v *vm.VM) error {
+func inputGetIndex(ic *interop.Context, v *vm.VM) error {
 	input, err := popInputFromVM(v)
 	if err != nil {
 		return err
@@ -290,7 +291,7 @@ func popOutputFromVM(v *vm.VM) (*transaction.Output, error) {
 }
 
 // outputGetAssetId returns asset ID from the given output.
-func (ic *interopContext) outputGetAssetID(v *vm.VM) error {
+func outputGetAssetID(ic *interop.Context, v *vm.VM) error {
 	output, err := popOutputFromVM(v)
 	if err != nil {
 		return err
@@ -300,7 +301,7 @@ func (ic *interopContext) outputGetAssetID(v *vm.VM) error {
 }
 
 // outputGetScriptHash returns scripthash from the given output.
-func (ic *interopContext) outputGetScriptHash(v *vm.VM) error {
+func outputGetScriptHash(ic *interop.Context, v *vm.VM) error {
 	output, err := popOutputFromVM(v)
 	if err != nil {
 		return err
@@ -310,7 +311,7 @@ func (ic *interopContext) outputGetScriptHash(v *vm.VM) error {
 }
 
 // outputGetValue returns value (amount) from the given output.
-func (ic *interopContext) outputGetValue(v *vm.VM) error {
+func outputGetValue(ic *interop.Context, v *vm.VM) error {
 	output, err := popOutputFromVM(v)
 	if err != nil {
 		return err
@@ -320,7 +321,7 @@ func (ic *interopContext) outputGetValue(v *vm.VM) error {
 }
 
 // attrGetData returns tx attribute data.
-func (ic *interopContext) attrGetData(v *vm.VM) error {
+func attrGetData(ic *interop.Context, v *vm.VM) error {
 	attrInterface := v.Estack().Pop().Value()
 	attr, ok := attrInterface.(*transaction.Attribute)
 	if !ok {
@@ -331,7 +332,7 @@ func (ic *interopContext) attrGetData(v *vm.VM) error {
 }
 
 // attrGetData returns tx attribute usage field.
-func (ic *interopContext) attrGetUsage(v *vm.VM) error {
+func attrGetUsage(ic *interop.Context, v *vm.VM) error {
 	attrInterface := v.Estack().Pop().Value()
 	attr, ok := attrInterface.(*transaction.Attribute)
 	if !ok {
@@ -342,13 +343,13 @@ func (ic *interopContext) attrGetUsage(v *vm.VM) error {
 }
 
 // bcGetAccount returns or creates an account.
-func (ic *interopContext) bcGetAccount(v *vm.VM) error {
+func bcGetAccount(ic *interop.Context, v *vm.VM) error {
 	accbytes := v.Estack().Pop().Bytes()
 	acchash, err := util.Uint160DecodeBytesBE(accbytes)
 	if err != nil {
 		return err
 	}
-	acc, err := ic.dao.GetAccountStateOrNew(acchash)
+	acc, err := ic.DAO.GetAccountStateOrNew(acchash)
 	if err != nil {
 		return err
 	}
@@ -357,13 +358,13 @@ func (ic *interopContext) bcGetAccount(v *vm.VM) error {
 }
 
 // bcGetAsset returns an asset.
-func (ic *interopContext) bcGetAsset(v *vm.VM) error {
+func bcGetAsset(ic *interop.Context, v *vm.VM) error {
 	asbytes := v.Estack().Pop().Bytes()
 	ashash, err := util.Uint256DecodeBytesBE(asbytes)
 	if err != nil {
 		return err
 	}
-	as, err := ic.dao.GetAssetState(ashash)
+	as, err := ic.DAO.GetAssetState(ashash)
 	if err != nil {
 		return errors.New("asset not found")
 	}
@@ -372,7 +373,7 @@ func (ic *interopContext) bcGetAsset(v *vm.VM) error {
 }
 
 // accountGetBalance returns balance for a given account.
-func (ic *interopContext) accountGetBalance(v *vm.VM) error {
+func accountGetBalance(ic *interop.Context, v *vm.VM) error {
 	accInterface := v.Estack().Pop().Value()
 	acc, ok := accInterface.(*state.Account)
 	if !ok {
@@ -392,7 +393,7 @@ func (ic *interopContext) accountGetBalance(v *vm.VM) error {
 }
 
 // accountGetScriptHash returns script hash of a given account.
-func (ic *interopContext) accountGetScriptHash(v *vm.VM) error {
+func accountGetScriptHash(ic *interop.Context, v *vm.VM) error {
 	accInterface := v.Estack().Pop().Value()
 	acc, ok := accInterface.(*state.Account)
 	if !ok {
@@ -403,7 +404,7 @@ func (ic *interopContext) accountGetScriptHash(v *vm.VM) error {
 }
 
 // accountGetVotes returns votes of a given account.
-func (ic *interopContext) accountGetVotes(v *vm.VM) error {
+func accountGetVotes(ic *interop.Context, v *vm.VM) error {
 	accInterface := v.Estack().Pop().Value()
 	acc, ok := accInterface.(*state.Account)
 	if !ok {
@@ -421,31 +422,31 @@ func (ic *interopContext) accountGetVotes(v *vm.VM) error {
 }
 
 // accountIsStandard checks whether given account is standard.
-func (ic *interopContext) accountIsStandard(v *vm.VM) error {
+func accountIsStandard(ic *interop.Context, v *vm.VM) error {
 	accbytes := v.Estack().Pop().Bytes()
 	acchash, err := util.Uint160DecodeBytesBE(accbytes)
 	if err != nil {
 		return err
 	}
-	contract, err := ic.dao.GetContractState(acchash)
+	contract, err := ic.DAO.GetContractState(acchash)
 	res := err != nil || vm.IsStandardContract(contract.Script)
 	v.Estack().PushVal(res)
 	return nil
 }
 
 // storageFind finds stored key-value pair.
-func (ic *interopContext) storageFind(v *vm.VM) error {
+func storageFind(ic *interop.Context, v *vm.VM) error {
 	stcInterface := v.Estack().Pop().Value()
 	stc, ok := stcInterface.(*StorageContext)
 	if !ok {
 		return fmt.Errorf("%T is not a StorageContext", stcInterface)
 	}
-	err := ic.checkStorageContext(stc)
+	err := checkStorageContext(ic, stc)
 	if err != nil {
 		return err
 	}
 	prefix := string(v.Estack().Pop().Bytes())
-	siMap, err := ic.dao.GetStorageItems(stc.ScriptHash)
+	siMap, err := ic.DAO.GetStorageItems(stc.ScriptHash)
 	if err != nil {
 		return err
 	}
@@ -467,8 +468,8 @@ func (ic *interopContext) storageFind(v *vm.VM) error {
 // createContractStateFromVM pops all contract state elements from the VM
 // evaluation stack, does a lot of checks and returns Contract if it
 // succeeds.
-func (ic *interopContext) createContractStateFromVM(v *vm.VM) (*state.Contract, error) {
-	if ic.trigger != trigger.Application {
+func createContractStateFromVM(ic *interop.Context, v *vm.VM) (*state.Contract, error) {
+	if ic.Trigger != trigger.Application {
 		return nil, errors.New("can't create contract when not triggered by an application")
 	}
 	script := v.Estack().Pop().Bytes()
@@ -520,15 +521,15 @@ func (ic *interopContext) createContractStateFromVM(v *vm.VM) (*state.Contract,
 }
 
 // contractCreate creates a contract.
-func (ic *interopContext) contractCreate(v *vm.VM) error {
-	newcontract, err := ic.createContractStateFromVM(v)
+func contractCreate(ic *interop.Context, v *vm.VM) error {
+	newcontract, err := createContractStateFromVM(ic, v)
 	if err != nil {
 		return err
 	}
-	contract, err := ic.dao.GetContractState(newcontract.ScriptHash())
+	contract, err := ic.DAO.GetContractState(newcontract.ScriptHash())
 	if err != nil {
 		contract = newcontract
-		err := ic.dao.PutContractState(contract)
+		err := ic.DAO.PutContractState(contract)
 		if err != nil {
 			return err
 		}
@@ -538,7 +539,7 @@ func (ic *interopContext) contractCreate(v *vm.VM) error {
 }
 
 // contractGetScript returns a script associated with a contract.
-func (ic *interopContext) contractGetScript(v *vm.VM) error {
+func contractGetScript(ic *interop.Context, v *vm.VM) error {
 	csInterface := v.Estack().Pop().Value()
 	cs, ok := csInterface.(*state.Contract)
 	if !ok {
@@ -549,7 +550,7 @@ func (ic *interopContext) contractGetScript(v *vm.VM) error {
 }
 
 // contractIsPayable returns whether contract is payable.
-func (ic *interopContext) contractIsPayable(v *vm.VM) error {
+func contractIsPayable(ic *interop.Context, v *vm.VM) error {
 	csInterface := v.Estack().Pop().Value()
 	cs, ok := csInterface.(*state.Contract)
 	if !ok {
@@ -560,27 +561,27 @@ func (ic *interopContext) contractIsPayable(v *vm.VM) error {
 }
 
 // contractMigrate migrates a contract.
-func (ic *interopContext) contractMigrate(v *vm.VM) error {
-	newcontract, err := ic.createContractStateFromVM(v)
+func contractMigrate(ic *interop.Context, v *vm.VM) error {
+	newcontract, err := createContractStateFromVM(ic, v)
 	if err != nil {
 		return err
 	}
-	contract, err := ic.dao.GetContractState(newcontract.ScriptHash())
+	contract, err := ic.DAO.GetContractState(newcontract.ScriptHash())
 	if err != nil {
 		contract = newcontract
-		err := ic.dao.PutContractState(contract)
+		err := ic.DAO.PutContractState(contract)
 		if err != nil {
 			return err
 		}
 		if contract.HasStorage() {
 			hash := getContextScriptHash(v, 0)
-			siMap, err := ic.dao.GetStorageItems(hash)
+			siMap, err := ic.DAO.GetStorageItems(hash)
 			if err != nil {
 				return err
 			}
 			for k, v := range siMap {
 				v.IsConst = false
-				err = ic.dao.PutStorageItem(contract.ScriptHash(), []byte(k), v)
+				err = ic.DAO.PutStorageItem(contract.ScriptHash(), []byte(k), v)
 				if err != nil {
 					return err
 				}
@@ -588,12 +589,12 @@ func (ic *interopContext) contractMigrate(v *vm.VM) error {
 		}
 	}
 	v.Estack().PushVal(vm.NewInteropItem(contract))
-	return ic.contractDestroy(v)
+	return contractDestroy(ic, v)
 }
 
 // assetCreate creates an asset.
-func (ic *interopContext) assetCreate(v *vm.VM) error {
-	if ic.trigger != trigger.Application {
+func assetCreate(ic *interop.Context, v *vm.VM) error {
+	if ic.Trigger != trigger.Application {
 		return errors.New("can't create asset when not triggered by an application")
 	}
 	atype := transaction.AssetType(v.Estack().Pop().BigInt().Int64())
@@ -635,7 +636,7 @@ func (ic *interopContext) assetCreate(v *vm.VM) error {
 	if owner.IsInfinity() {
 		return errors.New("can't have infinity as an owner key")
 	}
-	witnessOk, err := ic.checkKeyedWitness(owner)
+	witnessOk, err := checkKeyedWitness(ic, owner)
 	if err != nil {
 		return err
 	}
@@ -651,7 +652,7 @@ func (ic *interopContext) assetCreate(v *vm.VM) error {
 		return gherr.Wrap(err, "failed to get issuer")
 	}
 	asset := &state.Asset{
-		ID:         ic.tx.Hash(),
+		ID:         ic.Tx.Hash(),
 		AssetType:  atype,
 		Name:       name,
 		Amount:     amount,
@@ -659,9 +660,9 @@ func (ic *interopContext) assetCreate(v *vm.VM) error {
 		Owner:      *owner,
 		Admin:      admin,
 		Issuer:     issuer,
-		Expiration: ic.bc.BlockHeight() + DefaultAssetLifetime,
+		Expiration: ic.Chain.BlockHeight() + DefaultAssetLifetime,
 	}
-	err = ic.dao.PutAssetState(asset)
+	err = ic.DAO.PutAssetState(asset)
 	if err != nil {
 		return gherr.Wrap(err, "failed to Store asset")
 	}
@@ -670,7 +671,7 @@ func (ic *interopContext) assetCreate(v *vm.VM) error {
 }
 
 // assetGetAdmin returns asset admin.
-func (ic *interopContext) assetGetAdmin(v *vm.VM) error {
+func assetGetAdmin(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -681,7 +682,7 @@ func (ic *interopContext) assetGetAdmin(v *vm.VM) error {
 }
 
 // assetGetAmount returns the overall amount of asset available.
-func (ic *interopContext) assetGetAmount(v *vm.VM) error {
+func assetGetAmount(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -692,7 +693,7 @@ func (ic *interopContext) assetGetAmount(v *vm.VM) error {
 }
 
 // assetGetAssetId returns the id of an asset.
-func (ic *interopContext) assetGetAssetID(v *vm.VM) error {
+func assetGetAssetID(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -703,7 +704,7 @@ func (ic *interopContext) assetGetAssetID(v *vm.VM) error {
 }
 
 // assetGetAssetType returns type of an asset.
-func (ic *interopContext) assetGetAssetType(v *vm.VM) error {
+func assetGetAssetType(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -714,7 +715,7 @@ func (ic *interopContext) assetGetAssetType(v *vm.VM) error {
 }
 
 // assetGetAvailable returns available (not yet issued) amount of asset.
-func (ic *interopContext) assetGetAvailable(v *vm.VM) error {
+func assetGetAvailable(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -725,7 +726,7 @@ func (ic *interopContext) assetGetAvailable(v *vm.VM) error {
 }
 
 // assetGetIssuer returns issuer of an asset.
-func (ic *interopContext) assetGetIssuer(v *vm.VM) error {
+func assetGetIssuer(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -736,7 +737,7 @@ func (ic *interopContext) assetGetIssuer(v *vm.VM) error {
 }
 
 // assetGetOwner returns owner of an asset.
-func (ic *interopContext) assetGetOwner(v *vm.VM) error {
+func assetGetOwner(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -747,7 +748,7 @@ func (ic *interopContext) assetGetOwner(v *vm.VM) error {
 }
 
 // assetGetPrecision returns precision used to measure this asset.
-func (ic *interopContext) assetGetPrecision(v *vm.VM) error {
+func assetGetPrecision(ic *interop.Context, v *vm.VM) error {
 	asInterface := v.Estack().Pop().Value()
 	as, ok := asInterface.(*state.Asset)
 	if !ok {
@@ -758,8 +759,8 @@ func (ic *interopContext) assetGetPrecision(v *vm.VM) error {
 }
 
 // assetRenew updates asset expiration date.
-func (ic *interopContext) assetRenew(v *vm.VM) error {
-	if ic.trigger != trigger.Application {
+func assetRenew(ic *interop.Context, v *vm.VM) error {
+	if ic.Trigger != trigger.Application {
 		return errors.New("can't create asset when not triggered by an application")
 	}
 	asInterface := v.Estack().Pop().Value()
@@ -769,19 +770,19 @@ func (ic *interopContext) assetRenew(v *vm.VM) error {
 	}
 	years := byte(v.Estack().Pop().BigInt().Int64())
 	// Not sure why C# code regets an asset from the Store, but we also do it.
-	asset, err := ic.dao.GetAssetState(as.ID)
+	asset, err := ic.DAO.GetAssetState(as.ID)
 	if err != nil {
 		return errors.New("can't renew non-existent asset")
 	}
-	if asset.Expiration < ic.bc.BlockHeight()+1 {
-		asset.Expiration = ic.bc.BlockHeight() + 1
+	if asset.Expiration < ic.Chain.BlockHeight()+1 {
+		asset.Expiration = ic.Chain.BlockHeight() + 1
 	}
 	expiration := uint64(asset.Expiration) + uint64(years)*BlocksPerYear
 	if expiration > math.MaxUint32 {
 		expiration = math.MaxUint32
 	}
 	asset.Expiration = uint32(expiration)
-	err = ic.dao.PutAssetState(asset)
+	err = ic.DAO.PutAssetState(asset)
 	if err != nil {
 		return gherr.Wrap(err, "failed to Store asset")
 	}
@@ -790,57 +791,11 @@ func (ic *interopContext) assetRenew(v *vm.VM) error {
 }
 
 // runtimeSerialize serializes top stack item into a ByteArray.
-func (ic *interopContext) runtimeSerialize(v *vm.VM) error {
+func runtimeSerialize(_ *interop.Context, v *vm.VM) error {
 	return vm.RuntimeSerialize(v)
 }
 
 // runtimeDeserialize deserializes ByteArray from a stack into an item.
-func (ic *interopContext) runtimeDeserialize(v *vm.VM) error {
+func runtimeDeserialize(_ *interop.Context, v *vm.VM) error {
 	return vm.RuntimeDeserialize(v)
 }
-
-// enumeratorConcat concatenates 2 enumerators into a single one.
-func (ic *interopContext) enumeratorConcat(v *vm.VM) error {
-	return vm.EnumeratorConcat(v)
-}
-
-// enumeratorCreate creates an enumerator from an array-like stack item.
-func (ic *interopContext) enumeratorCreate(v *vm.VM) error {
-	return vm.EnumeratorCreate(v)
-}
-
-// enumeratorNext advances the enumerator, pushes true if is it was successful
-// and false otherwise.
-func (ic *interopContext) enumeratorNext(v *vm.VM) error {
-	return vm.EnumeratorNext(v)
-}
-
-// enumeratorValue returns the current value of the enumerator.
-func (ic *interopContext) enumeratorValue(v *vm.VM) error {
-	return vm.EnumeratorValue(v)
-}
-
-// iteratorConcat concatenates 2 iterators into a single one.
-func (ic *interopContext) iteratorConcat(v *vm.VM) error {
-	return vm.IteratorConcat(v)
-}
-
-// iteratorCreate creates an iterator from array-like or map stack item.
-func (ic *interopContext) iteratorCreate(v *vm.VM) error {
-	return vm.IteratorCreate(v)
-}
-
-// iteratorKey returns current iterator key.
-func (ic *interopContext) iteratorKey(v *vm.VM) error {
-	return vm.IteratorKey(v)
-}
-
-// iteratorKeys returns keys of the iterator.
-func (ic *interopContext) iteratorKeys(v *vm.VM) error {
-	return vm.IteratorKeys(v)
-}
-
-// iteratorValues returns values of the iterator.
-func (ic *interopContext) iteratorValues(v *vm.VM) error {
-	return vm.IteratorValues(v)
-}
diff --git a/pkg/core/interop_neo_test.go b/pkg/core/interop_neo_test.go
index 135302927..26068690f 100644
--- a/pkg/core/interop_neo_test.go
+++ b/pkg/core/interop_neo_test.go
@@ -6,6 +6,9 @@ import (
 
 	"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/enumerator"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop/iterator"
 	"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"
@@ -39,7 +42,7 @@ import (
 func TestGetTrigger(t *testing.T) {
 	v, _, context, chain := createVMAndPushBlock(t)
 	defer chain.Close()
-	require.NoError(t, context.runtimeGetTrigger(v))
+	require.NoError(t, runtimeGetTrigger(context, v))
 }
 
 func TestStorageFind(t *testing.T) {
@@ -56,12 +59,12 @@ func TestStorageFind(t *testing.T) {
 		},
 	}
 
-	require.NoError(t, context.dao.PutContractState(contractState))
+	require.NoError(t, context.DAO.PutContractState(contractState))
 
 	scriptHash := contractState.ScriptHash()
 
 	for i := range skeys {
-		err := context.dao.PutStorageItem(scriptHash, skeys[i], items[i])
+		err := context.DAO.PutStorageItem(scriptHash, skeys[i], items[i])
 		require.NoError(t, err)
 	}
 
@@ -69,25 +72,25 @@ func TestStorageFind(t *testing.T) {
 		v.Estack().PushVal([]byte{0x01})
 		v.Estack().PushVal(vm.NewInteropItem(&StorageContext{ScriptHash: scriptHash}))
 
-		err := context.storageFind(v)
+		err := storageFind(context, v)
 		require.NoError(t, err)
 
 		var iter *vm.InteropItem
 		require.NotPanics(t, func() { iter = v.Estack().Top().Interop() })
 
-		require.NoError(t, context.enumeratorNext(v))
+		require.NoError(t, enumerator.Next(context, v))
 		require.True(t, v.Estack().Pop().Bool())
 
 		v.Estack().PushVal(iter)
-		require.NoError(t, context.iteratorKey(v))
+		require.NoError(t, iterator.Key(context, v))
 		require.Equal(t, []byte{0x01, 0x02}, v.Estack().Pop().Bytes())
 
 		v.Estack().PushVal(iter)
-		require.NoError(t, context.enumeratorValue(v))
+		require.NoError(t, enumerator.Value(context, v))
 		require.Equal(t, []byte{0x01, 0x02, 0x03, 0x04}, v.Estack().Pop().Bytes())
 
 		v.Estack().PushVal(iter)
-		require.NoError(t, context.enumeratorNext(v))
+		require.NoError(t, enumerator.Next(context, v))
 		require.False(t, v.Estack().Pop().Bool())
 	})
 
@@ -95,7 +98,7 @@ func TestStorageFind(t *testing.T) {
 		v.Estack().PushVal([]byte{0x01})
 		v.Estack().PushVal(vm.NewInteropItem(nil))
 
-		require.Error(t, context.storageFind(v))
+		require.Error(t, storageFind(context, v))
 	})
 
 	t.Run("invalid script hash", func(t *testing.T) {
@@ -105,7 +108,7 @@ func TestStorageFind(t *testing.T) {
 		v.Estack().PushVal([]byte{0x01})
 		v.Estack().PushVal(vm.NewInteropItem(&StorageContext{ScriptHash: invalidHash}))
 
-		require.Error(t, context.storageFind(v))
+		require.Error(t, storageFind(context, v))
 	})
 }
 
@@ -113,7 +116,7 @@ func TestHeaderGetVersion(t *testing.T) {
 	v, block, context, chain := createVMAndPushBlock(t)
 	defer chain.Close()
 
-	err := context.headerGetVersion(v)
+	err := headerGetVersion(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().(*big.Int)
 	require.Equal(t, uint64(block.Version), value.Uint64())
@@ -127,7 +130,7 @@ func TestHeaderGetVersion_Negative(t *testing.T) {
 	context := chain.newInteropContext(trigger.Application, dao.NewSimple(storage.NewMemoryStore()), block, nil)
 	v.Estack().PushVal(vm.NewBoolItem(false))
 
-	err := context.headerGetVersion(v)
+	err := headerGetVersion(context, v)
 	require.Errorf(t, err, "value is not a header or block")
 }
 
@@ -135,7 +138,7 @@ func TestHeaderGetConsensusData(t *testing.T) {
 	v, block, context, chain := createVMAndPushBlock(t)
 	defer chain.Close()
 
-	err := context.headerGetConsensusData(v)
+	err := headerGetConsensusData(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().(*big.Int)
 	require.Equal(t, block.ConsensusData, value.Uint64())
@@ -145,7 +148,7 @@ func TestHeaderGetMerkleRoot(t *testing.T) {
 	v, block, context, chain := createVMAndPushBlock(t)
 	defer chain.Close()
 
-	err := context.headerGetMerkleRoot(v)
+	err := headerGetMerkleRoot(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value()
 	require.Equal(t, block.MerkleRoot.BytesBE(), value)
@@ -155,7 +158,7 @@ func TestHeaderGetNextConsensus(t *testing.T) {
 	v, block, context, chain := createVMAndPushBlock(t)
 	defer chain.Close()
 
-	err := context.headerGetNextConsensus(v)
+	err := headerGetNextConsensus(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value()
 	require.Equal(t, block.NextConsensus.BytesBE(), value)
@@ -165,7 +168,7 @@ func TestTxGetAttributes(t *testing.T) {
 	v, tx, context, chain := createVMAndPushTX(t)
 	defer chain.Close()
 
-	err := context.txGetAttributes(v)
+	err := txGetAttributes(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().([]vm.StackItem)
 	require.Equal(t, tx.Attributes[0].Usage, value[0].Value().(*transaction.Attribute).Usage)
@@ -175,7 +178,7 @@ func TestTxGetInputs(t *testing.T) {
 	v, tx, context, chain := createVMAndPushTX(t)
 	defer chain.Close()
 
-	err := context.txGetInputs(v)
+	err := txGetInputs(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().([]vm.StackItem)
 	require.Equal(t, tx.Inputs[0], *value[0].Value().(*transaction.Input))
@@ -185,7 +188,7 @@ func TestTxGetOutputs(t *testing.T) {
 	v, tx, context, chain := createVMAndPushTX(t)
 	defer chain.Close()
 
-	err := context.txGetOutputs(v)
+	err := txGetOutputs(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().([]vm.StackItem)
 	require.Equal(t, tx.Outputs[0], *value[0].Value().(*transaction.Output))
@@ -195,7 +198,7 @@ func TestTxGetType(t *testing.T) {
 	v, tx, context, chain := createVMAndPushTX(t)
 	defer chain.Close()
 
-	err := context.txGetType(v)
+	err := txGetType(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().(*big.Int)
 	require.Equal(t, big.NewInt(int64(tx.Type)), value)
@@ -205,7 +208,7 @@ func TestInvocationTxGetScript(t *testing.T) {
 	v, tx, context, chain := createVMAndPushTX(t)
 	defer chain.Close()
 
-	err := context.invocationTxGetScript(v)
+	err := invocationTxGetScript(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().([]byte)
 	inv := tx.Data.(*transaction.InvocationTX)
@@ -222,7 +225,7 @@ func TestWitnessGetVerificationScript(t *testing.T) {
 
 	context := chain.newInteropContext(trigger.Application, dao.NewSimple(storage.NewMemoryStore()), nil, nil)
 	v.Estack().PushVal(vm.NewInteropItem(&witness))
-	err := context.witnessGetVerificationScript(v)
+	err := witnessGetVerificationScript(context, v)
 	require.NoError(t, err)
 	value := v.Estack().Pop().Value().([]byte)
 	require.Equal(t, witness.VerificationScript, value)
@@ -243,7 +246,7 @@ func TestInputGetHash(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Inputs[0]))
 
-	err := context.inputGetHash(v)
+	err := inputGetHash(context, v)
 	require.NoError(t, err)
 	hash := v.Estack().Pop().Value()
 	require.Equal(t, tx.Inputs[0].PrevHash.BytesBE(), hash)
@@ -254,7 +257,7 @@ func TestInputGetIndex(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Inputs[0]))
 
-	err := context.inputGetIndex(v)
+	err := inputGetIndex(context, v)
 	require.NoError(t, err)
 	index := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(tx.Inputs[0].PrevIndex)), index)
@@ -275,7 +278,7 @@ func TestOutputGetAssetID(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Outputs[0]))
 
-	err := context.outputGetAssetID(v)
+	err := outputGetAssetID(context, v)
 	require.NoError(t, err)
 	assetID := v.Estack().Pop().Value()
 	require.Equal(t, tx.Outputs[0].AssetID.BytesBE(), assetID)
@@ -286,7 +289,7 @@ func TestOutputGetScriptHash(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Outputs[0]))
 
-	err := context.outputGetScriptHash(v)
+	err := outputGetScriptHash(context, v)
 	require.NoError(t, err)
 	scriptHash := v.Estack().Pop().Value()
 	require.Equal(t, tx.Outputs[0].ScriptHash.BytesBE(), scriptHash)
@@ -297,7 +300,7 @@ func TestOutputGetValue(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Outputs[0]))
 
-	err := context.outputGetValue(v)
+	err := outputGetValue(context, v)
 	require.NoError(t, err)
 	amount := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(tx.Outputs[0].Amount)), amount)
@@ -308,7 +311,7 @@ func TestAttrGetData(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Attributes[0]))
 
-	err := context.attrGetData(v)
+	err := attrGetData(context, v)
 	require.NoError(t, err)
 	data := v.Estack().Pop().Value()
 	require.Equal(t, tx.Attributes[0].Data, data)
@@ -319,7 +322,7 @@ func TestAttrGetUsage(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(&tx.Attributes[0]))
 
-	err := context.attrGetUsage(v)
+	err := attrGetUsage(context, v)
 	require.NoError(t, err)
 	usage := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(tx.Attributes[0].Usage)), usage)
@@ -330,7 +333,7 @@ func TestAccountGetScriptHash(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(accState))
 
-	err := context.accountGetScriptHash(v)
+	err := accountGetScriptHash(context, v)
 	require.NoError(t, err)
 	hash := v.Estack().Pop().Value()
 	require.Equal(t, accState.ScriptHash.BytesBE(), hash)
@@ -341,7 +344,7 @@ func TestAccountGetVotes(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(accState))
 
-	err := context.accountGetVotes(v)
+	err := accountGetVotes(context, v)
 	require.NoError(t, err)
 	votes := v.Estack().Pop().Value().([]vm.StackItem)
 	require.Equal(t, vm.NewByteArrayItem(accState.Votes[0].Bytes()), votes[0])
@@ -352,7 +355,7 @@ func TestContractGetScript(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(contractState))
 
-	err := context.contractGetScript(v)
+	err := contractGetScript(context, v)
 	require.NoError(t, err)
 	script := v.Estack().Pop().Value()
 	require.Equal(t, contractState.Script, script)
@@ -363,7 +366,7 @@ func TestContractIsPayable(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(contractState))
 
-	err := context.contractIsPayable(v)
+	err := contractIsPayable(context, v)
 	require.NoError(t, err)
 	isPayable := v.Estack().Pop().Value()
 	require.Equal(t, contractState.IsPayable(), isPayable)
@@ -374,7 +377,7 @@ func TestAssetGetAdmin(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetAdmin(v)
+	err := assetGetAdmin(context, v)
 	require.NoError(t, err)
 	admin := v.Estack().Pop().Value()
 	require.Equal(t, assetState.Admin.BytesBE(), admin)
@@ -385,7 +388,7 @@ func TestAssetGetAmount(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetAmount(v)
+	err := assetGetAmount(context, v)
 	require.NoError(t, err)
 	amount := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(assetState.Amount)), amount)
@@ -396,7 +399,7 @@ func TestAssetGetAssetID(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetAssetID(v)
+	err := assetGetAssetID(context, v)
 	require.NoError(t, err)
 	assetID := v.Estack().Pop().Value()
 	require.Equal(t, assetState.ID.BytesBE(), assetID)
@@ -407,7 +410,7 @@ func TestAssetGetAssetType(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetAssetType(v)
+	err := assetGetAssetType(context, v)
 	require.NoError(t, err)
 	assetType := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(assetState.AssetType)), assetType)
@@ -418,7 +421,7 @@ func TestAssetGetAvailable(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetAvailable(v)
+	err := assetGetAvailable(context, v)
 	require.NoError(t, err)
 	available := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(assetState.Available)), available)
@@ -429,7 +432,7 @@ func TestAssetGetIssuer(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetIssuer(v)
+	err := assetGetIssuer(context, v)
 	require.NoError(t, err)
 	issuer := v.Estack().Pop().Value()
 	require.Equal(t, assetState.Issuer.BytesBE(), issuer)
@@ -440,7 +443,7 @@ func TestAssetGetOwner(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetOwner(v)
+	err := assetGetOwner(context, v)
 	require.NoError(t, err)
 	owner := v.Estack().Pop().Value()
 	require.Equal(t, assetState.Owner.Bytes(), owner)
@@ -451,7 +454,7 @@ func TestAssetGetPrecision(t *testing.T) {
 	defer chain.Close()
 	v.Estack().PushVal(vm.NewInteropItem(assetState))
 
-	err := context.assetGetPrecision(v)
+	err := assetGetPrecision(context, v)
 	require.NoError(t, err)
 	precision := v.Estack().Pop().Value()
 	require.Equal(t, big.NewInt(int64(assetState.Precision)), precision)
@@ -459,7 +462,7 @@ func TestAssetGetPrecision(t *testing.T) {
 
 // Helper functions to create VM, InteropContext, TX, Account, Contract, Asset.
 
-func createVMAndPushBlock(t *testing.T) (*vm.VM, *block.Block, *interopContext, *Blockchain) {
+func createVMAndPushBlock(t *testing.T) (*vm.VM, *block.Block, *interop.Context, *Blockchain) {
 	v := vm.New()
 	block := newDumbBlock()
 	chain := newTestChain(t)
@@ -468,13 +471,13 @@ func createVMAndPushBlock(t *testing.T) (*vm.VM, *block.Block, *interopContext,
 	return v, block, context, chain
 }
 
-func createVMAndPushTX(t *testing.T) (*vm.VM, *transaction.Transaction, *interopContext, *Blockchain) {
+func createVMAndPushTX(t *testing.T) (*vm.VM, *transaction.Transaction, *interop.Context, *Blockchain) {
 	v, tx, context, chain := createVMAndTX(t)
 	v.Estack().PushVal(vm.NewInteropItem(tx))
 	return v, tx, context, chain
 }
 
-func createVMAndAssetState(t *testing.T) (*vm.VM, *state.Asset, *interopContext, *Blockchain) {
+func createVMAndAssetState(t *testing.T) (*vm.VM, *state.Asset, *interop.Context, *Blockchain) {
 	v := vm.New()
 	assetState := &state.Asset{
 		ID:         util.Uint256{},
@@ -497,7 +500,7 @@ func createVMAndAssetState(t *testing.T) (*vm.VM, *state.Asset, *interopContext,
 	return v, assetState, context, chain
 }
 
-func createVMAndContractState(t *testing.T) (*vm.VM, *state.Contract, *interopContext, *Blockchain) {
+func createVMAndContractState(t *testing.T) (*vm.VM, *state.Contract, *interop.Context, *Blockchain) {
 	v := vm.New()
 	contractState := &state.Contract{
 		Script:      []byte("testscript"),
@@ -516,7 +519,7 @@ func createVMAndContractState(t *testing.T) (*vm.VM, *state.Contract, *interopCo
 	return v, contractState, context, chain
 }
 
-func createVMAndAccState(t *testing.T) (*vm.VM, *state.Account, *interopContext, *Blockchain) {
+func createVMAndAccState(t *testing.T) (*vm.VM, *state.Account, *interop.Context, *Blockchain) {
 	v := vm.New()
 	rawHash := "4d3b96ae1bcc5a585e075e3b81920210dec16302"
 	hash, err := util.Uint160DecodeStringBE(rawHash)
@@ -531,7 +534,7 @@ func createVMAndAccState(t *testing.T) (*vm.VM, *state.Account, *interopContext,
 	return v, accountState, context, chain
 }
 
-func createVMAndTX(t *testing.T) (*vm.VM, *transaction.Transaction, *interopContext, *Blockchain) {
+func createVMAndTX(t *testing.T) (*vm.VM, *transaction.Transaction, *interop.Context, *Blockchain) {
 	v := vm.New()
 	script := []byte{byte(opcode.PUSH1), byte(opcode.RET)}
 	tx := transaction.NewInvocationTX(script, 0)
diff --git a/pkg/core/interop_system.go b/pkg/core/interop_system.go
index f07da9905..bb6816f97 100644
--- a/pkg/core/interop_system.go
+++ b/pkg/core/interop_system.go
@@ -6,7 +6,9 @@ import (
 	"math"
 
 	"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/dao"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
@@ -32,7 +34,7 @@ type StorageContext struct {
 // getBlockHashFromElement converts given vm.Element to block hash using given
 // Blockchainer if needed. Interop functions accept both block numbers and
 // block hashes as parameters, thus this function is needed.
-func getBlockHashFromElement(bc Blockchainer, element *vm.Element) (util.Uint256, error) {
+func getBlockHashFromElement(bc blockchainer.Blockchainer, element *vm.Element) (util.Uint256, error) {
 	var hash util.Uint256
 	hashbytes := element.Bytes()
 	if len(hashbytes) <= 5 {
@@ -48,12 +50,12 @@ func getBlockHashFromElement(bc Blockchainer, element *vm.Element) (util.Uint256
 }
 
 // bcGetBlock returns current block.
-func (ic *interopContext) bcGetBlock(v *vm.VM) error {
-	hash, err := getBlockHashFromElement(ic.bc, v.Estack().Pop())
+func bcGetBlock(ic *interop.Context, v *vm.VM) error {
+	hash, err := getBlockHashFromElement(ic.Chain, v.Estack().Pop())
 	if err != nil {
 		return err
 	}
-	block, err := ic.bc.GetBlock(hash)
+	block, err := ic.Chain.GetBlock(hash)
 	if err != nil {
 		v.Estack().PushVal([]byte{})
 	} else {
@@ -63,13 +65,13 @@ func (ic *interopContext) bcGetBlock(v *vm.VM) error {
 }
 
 // bcGetContract returns contract.
-func (ic *interopContext) bcGetContract(v *vm.VM) error {
+func bcGetContract(ic *interop.Context, v *vm.VM) error {
 	hashbytes := v.Estack().Pop().Bytes()
 	hash, err := util.Uint160DecodeBytesBE(hashbytes)
 	if err != nil {
 		return err
 	}
-	cs, err := ic.dao.GetContractState(hash)
+	cs, err := ic.DAO.GetContractState(hash)
 	if err != nil {
 		v.Estack().PushVal([]byte{})
 	} else {
@@ -79,12 +81,12 @@ func (ic *interopContext) bcGetContract(v *vm.VM) error {
 }
 
 // bcGetHeader returns block header.
-func (ic *interopContext) bcGetHeader(v *vm.VM) error {
-	hash, err := getBlockHashFromElement(ic.bc, v.Estack().Pop())
+func bcGetHeader(ic *interop.Context, v *vm.VM) error {
+	hash, err := getBlockHashFromElement(ic.Chain, v.Estack().Pop())
 	if err != nil {
 		return err
 	}
-	header, err := ic.bc.GetHeader(hash)
+	header, err := ic.Chain.GetHeader(hash)
 	if err != nil {
 		v.Estack().PushVal([]byte{})
 	} else {
@@ -94,8 +96,8 @@ func (ic *interopContext) bcGetHeader(v *vm.VM) error {
 }
 
 // bcGetHeight returns blockchain height.
-func (ic *interopContext) bcGetHeight(v *vm.VM) error {
-	v.Estack().PushVal(ic.bc.BlockHeight())
+func bcGetHeight(ic *interop.Context, v *vm.VM) error {
+	v.Estack().PushVal(ic.Chain.BlockHeight())
 	return nil
 }
 
@@ -111,8 +113,8 @@ func getTransactionAndHeight(cd *dao.Cached, v *vm.VM) (*transaction.Transaction
 }
 
 // bcGetTransaction returns transaction.
-func (ic *interopContext) bcGetTransaction(v *vm.VM) error {
-	tx, _, err := getTransactionAndHeight(ic.dao, v)
+func bcGetTransaction(ic *interop.Context, v *vm.VM) error {
+	tx, _, err := getTransactionAndHeight(ic.DAO, v)
 	if err != nil {
 		return err
 	}
@@ -121,8 +123,8 @@ func (ic *interopContext) bcGetTransaction(v *vm.VM) error {
 }
 
 // bcGetTransactionHeight returns transaction height.
-func (ic *interopContext) bcGetTransactionHeight(v *vm.VM) error {
-	_, h, err := getTransactionAndHeight(ic.dao, v)
+func bcGetTransactionHeight(ic *interop.Context, v *vm.VM) error {
+	_, h, err := getTransactionAndHeight(ic.DAO, v)
 	if err != nil {
 		return err
 	}
@@ -147,7 +149,7 @@ func popHeaderFromVM(v *vm.VM) (*block.Header, error) {
 }
 
 // headerGetIndex returns block index from the header.
-func (ic *interopContext) headerGetIndex(v *vm.VM) error {
+func headerGetIndex(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -157,7 +159,7 @@ func (ic *interopContext) headerGetIndex(v *vm.VM) error {
 }
 
 // headerGetHash returns header hash of the passed header.
-func (ic *interopContext) headerGetHash(v *vm.VM) error {
+func headerGetHash(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -167,7 +169,7 @@ func (ic *interopContext) headerGetHash(v *vm.VM) error {
 }
 
 // headerGetPrevHash returns previous header hash of the passed header.
-func (ic *interopContext) headerGetPrevHash(v *vm.VM) error {
+func headerGetPrevHash(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -177,7 +179,7 @@ func (ic *interopContext) headerGetPrevHash(v *vm.VM) error {
 }
 
 // headerGetTimestamp returns timestamp of the passed header.
-func (ic *interopContext) headerGetTimestamp(v *vm.VM) error {
+func headerGetTimestamp(ic *interop.Context, v *vm.VM) error {
 	header, err := popHeaderFromVM(v)
 	if err != nil {
 		return err
@@ -187,7 +189,7 @@ func (ic *interopContext) headerGetTimestamp(v *vm.VM) error {
 }
 
 // blockGetTransactionCount returns transactions count in the given block.
-func (ic *interopContext) blockGetTransactionCount(v *vm.VM) error {
+func blockGetTransactionCount(ic *interop.Context, v *vm.VM) error {
 	blockInterface := v.Estack().Pop().Value()
 	block, ok := blockInterface.(*block.Block)
 	if !ok {
@@ -198,7 +200,7 @@ func (ic *interopContext) blockGetTransactionCount(v *vm.VM) error {
 }
 
 // blockGetTransactions returns transactions from the given block.
-func (ic *interopContext) blockGetTransactions(v *vm.VM) error {
+func blockGetTransactions(ic *interop.Context, v *vm.VM) error {
 	blockInterface := v.Estack().Pop().Value()
 	block, ok := blockInterface.(*block.Block)
 	if !ok {
@@ -217,7 +219,7 @@ func (ic *interopContext) blockGetTransactions(v *vm.VM) error {
 
 // blockGetTransaction returns transaction with the given number from the given
 // block.
-func (ic *interopContext) blockGetTransaction(v *vm.VM) error {
+func blockGetTransaction(ic *interop.Context, v *vm.VM) error {
 	blockInterface := v.Estack().Pop().Value()
 	block, ok := blockInterface.(*block.Block)
 	if !ok {
@@ -233,7 +235,7 @@ func (ic *interopContext) blockGetTransaction(v *vm.VM) error {
 }
 
 // txGetHash returns transaction's hash.
-func (ic *interopContext) txGetHash(v *vm.VM) error {
+func txGetHash(ic *interop.Context, v *vm.VM) error {
 	txInterface := v.Estack().Pop().Value()
 	tx, ok := txInterface.(*transaction.Transaction)
 	if !ok {
@@ -245,8 +247,8 @@ func (ic *interopContext) txGetHash(v *vm.VM) error {
 
 // engineGetScriptContainer returns transaction that contains the script being
 // run.
-func (ic *interopContext) engineGetScriptContainer(v *vm.VM) error {
-	v.Estack().PushVal(vm.NewInteropItem(ic.tx))
+func engineGetScriptContainer(ic *interop.Context, v *vm.VM) error {
+	v.Estack().PushVal(vm.NewInteropItem(ic.Tx))
 	return nil
 }
 
@@ -267,36 +269,36 @@ func pushContextScriptHash(v *vm.VM, n int) error {
 }
 
 // engineGetExecutingScriptHash returns executing script hash.
-func (ic *interopContext) engineGetExecutingScriptHash(v *vm.VM) error {
+func engineGetExecutingScriptHash(ic *interop.Context, v *vm.VM) error {
 	return pushContextScriptHash(v, 0)
 }
 
 // engineGetCallingScriptHash returns calling script hash.
-func (ic *interopContext) engineGetCallingScriptHash(v *vm.VM) error {
+func engineGetCallingScriptHash(ic *interop.Context, v *vm.VM) error {
 	return pushContextScriptHash(v, 1)
 }
 
 // engineGetEntryScriptHash returns entry script hash.
-func (ic *interopContext) engineGetEntryScriptHash(v *vm.VM) error {
+func engineGetEntryScriptHash(ic *interop.Context, v *vm.VM) error {
 	return pushContextScriptHash(v, v.Istack().Len()-1)
 }
 
 // runtimePlatform returns the name of the platform.
-func (ic *interopContext) runtimePlatform(v *vm.VM) error {
+func runtimePlatform(ic *interop.Context, v *vm.VM) error {
 	v.Estack().PushVal([]byte("NEO"))
 	return nil
 }
 
 // runtimeGetTrigger returns the script trigger.
-func (ic *interopContext) runtimeGetTrigger(v *vm.VM) error {
-	v.Estack().PushVal(byte(ic.trigger))
+func runtimeGetTrigger(ic *interop.Context, v *vm.VM) error {
+	v.Estack().PushVal(byte(ic.Trigger))
 	return nil
 }
 
 // checkHashedWitness checks given hash against current list of script hashes
 // for verifying in the interop context.
-func (ic *interopContext) checkHashedWitness(hash util.Uint160) (bool, error) {
-	hashes, err := ic.bc.GetScriptHashesForVerifying(ic.tx)
+func checkHashedWitness(ic *interop.Context, hash util.Uint160) (bool, error) {
+	hashes, err := ic.Chain.GetScriptHashesForVerifying(ic.Tx)
 	if err != nil {
 		return false, gherr.Wrap(err, "failed to get script hashes")
 	}
@@ -310,12 +312,12 @@ func (ic *interopContext) checkHashedWitness(hash util.Uint160) (bool, error) {
 
 // checkKeyedWitness checks hash of signature check contract with a given public
 // key against current list of script hashes for verifying in the interop context.
-func (ic *interopContext) checkKeyedWitness(key *keys.PublicKey) (bool, error) {
-	return ic.checkHashedWitness(key.GetScriptHash())
+func checkKeyedWitness(ic *interop.Context, key *keys.PublicKey) (bool, error) {
+	return checkHashedWitness(ic, key.GetScriptHash())
 }
 
 // runtimeCheckWitness checks witnesses.
-func (ic *interopContext) runtimeCheckWitness(v *vm.VM) error {
+func runtimeCheckWitness(ic *interop.Context, v *vm.VM) error {
 	var res bool
 	var err error
 
@@ -327,9 +329,9 @@ func (ic *interopContext) runtimeCheckWitness(v *vm.VM) error {
 		if err != nil {
 			return errors.New("parameter given is neither a key nor a hash")
 		}
-		res, err = ic.checkKeyedWitness(key)
+		res, err = checkKeyedWitness(ic, key)
 	} else {
-		res, err = ic.checkHashedWitness(hash)
+		res, err = checkHashedWitness(ic, hash)
 	}
 	if err != nil {
 		return gherr.Wrap(err, "failed to check")
@@ -340,7 +342,7 @@ func (ic *interopContext) runtimeCheckWitness(v *vm.VM) error {
 
 // runtimeNotify should pass stack item to the notify plugin to handle it, but
 // in neo-go the only meaningful thing to do here is to log.
-func (ic *interopContext) runtimeNotify(v *vm.VM) error {
+func runtimeNotify(ic *interop.Context, v *vm.VM) error {
 	// It can be just about anything.
 	e := v.Estack().Pop()
 	item := e.Item()
@@ -354,49 +356,38 @@ func (ic *interopContext) runtimeNotify(v *vm.VM) error {
 		item = vm.NewByteArrayItem([]byte(fmt.Sprintf("bad notification: %v", err)))
 	}
 	ne := state.NotificationEvent{ScriptHash: getContextScriptHash(v, 0), Item: item}
-	ic.notifications = append(ic.notifications, ne)
+	ic.Notifications = append(ic.Notifications, ne)
 	return nil
 }
 
 // runtimeLog logs the message passed.
-func (ic *interopContext) runtimeLog(v *vm.VM) error {
+func runtimeLog(ic *interop.Context, v *vm.VM) error {
 	msg := fmt.Sprintf("%q", v.Estack().Pop().Bytes())
-	ic.log.Info("runtime log",
+	ic.Log.Info("runtime log",
 		zap.Stringer("script", getContextScriptHash(v, 0)),
 		zap.String("logs", msg))
 	return nil
 }
 
 // runtimeGetTime returns timestamp of the block being verified, or the latest
-// one in the blockchain if no block is given to interopContext.
-func (ic *interopContext) runtimeGetTime(v *vm.VM) error {
+// one in the blockchain if no block is given to Context.
+func runtimeGetTime(ic *interop.Context, v *vm.VM) error {
 	var header *block.Header
-	if ic.block == nil {
+	if ic.Block == nil {
 		var err error
-		header, err = ic.bc.GetHeader(ic.bc.CurrentBlockHash())
+		header, err = ic.Chain.GetHeader(ic.Chain.CurrentBlockHash())
 		if err != nil {
 			return err
 		}
 	} else {
-		header = ic.block.Header()
+		header = ic.Block.Header()
 	}
 	v.Estack().PushVal(header.Timestamp)
 	return nil
 }
 
-/*
-// runtimeSerialize serializes given stack item.
-func (ic *interopContext) runtimeSerialize(v *vm.VM) error {
-	panic("TODO")
-}
-
-// runtimeDeserialize deserializes given stack item.
-func (ic *interopContext) runtimeDeserialize(v *vm.VM) error {
-	panic("TODO")
-}
-*/
-func (ic *interopContext) checkStorageContext(stc *StorageContext) error {
-	contract, err := ic.dao.GetContractState(stc.ScriptHash)
+func checkStorageContext(ic *interop.Context, stc *StorageContext) error {
+	contract, err := ic.DAO.GetContractState(stc.ScriptHash)
 	if err != nil {
 		return errors.New("no contract found")
 	}
@@ -407,8 +398,8 @@ func (ic *interopContext) checkStorageContext(stc *StorageContext) error {
 }
 
 // storageDelete deletes stored key-value pair.
-func (ic *interopContext) storageDelete(v *vm.VM) error {
-	if ic.trigger != trigger.Application && ic.trigger != trigger.ApplicationR {
+func storageDelete(ic *interop.Context, v *vm.VM) error {
+	if ic.Trigger != trigger.Application && ic.Trigger != trigger.ApplicationR {
 		return errors.New("can't delete when the trigger is not application")
 	}
 	stcInterface := v.Estack().Pop().Value()
@@ -419,31 +410,31 @@ func (ic *interopContext) storageDelete(v *vm.VM) error {
 	if stc.ReadOnly {
 		return errors.New("StorageContext is read only")
 	}
-	err := ic.checkStorageContext(stc)
+	err := checkStorageContext(ic, stc)
 	if err != nil {
 		return err
 	}
 	key := v.Estack().Pop().Bytes()
-	si := ic.dao.GetStorageItem(stc.ScriptHash, key)
+	si := ic.DAO.GetStorageItem(stc.ScriptHash, key)
 	if si != nil && si.IsConst {
 		return errors.New("storage item is constant")
 	}
-	return ic.dao.DeleteStorageItem(stc.ScriptHash, key)
+	return ic.DAO.DeleteStorageItem(stc.ScriptHash, key)
 }
 
 // storageGet returns stored key-value pair.
-func (ic *interopContext) storageGet(v *vm.VM) error {
+func storageGet(ic *interop.Context, v *vm.VM) error {
 	stcInterface := v.Estack().Pop().Value()
 	stc, ok := stcInterface.(*StorageContext)
 	if !ok {
 		return fmt.Errorf("%T is not a StorageContext", stcInterface)
 	}
-	err := ic.checkStorageContext(stc)
+	err := checkStorageContext(ic, stc)
 	if err != nil {
 		return err
 	}
 	key := v.Estack().Pop().Bytes()
-	si := ic.dao.GetStorageItem(stc.ScriptHash, key)
+	si := ic.DAO.GetStorageItem(stc.ScriptHash, key)
 	if si != nil && si.Value != nil {
 		v.Estack().PushVal(si.Value)
 	} else {
@@ -453,7 +444,7 @@ func (ic *interopContext) storageGet(v *vm.VM) error {
 }
 
 // storageGetContext returns storage context (scripthash).
-func (ic *interopContext) storageGetContext(v *vm.VM) error {
+func storageGetContext(ic *interop.Context, v *vm.VM) error {
 	sc := &StorageContext{
 		ScriptHash: getContextScriptHash(v, 0),
 		ReadOnly:   false,
@@ -463,7 +454,7 @@ func (ic *interopContext) storageGetContext(v *vm.VM) error {
 }
 
 // storageGetReadOnlyContext returns read-only context (scripthash).
-func (ic *interopContext) storageGetReadOnlyContext(v *vm.VM) error {
+func storageGetReadOnlyContext(ic *interop.Context, v *vm.VM) error {
 	sc := &StorageContext{
 		ScriptHash: getContextScriptHash(v, 0),
 		ReadOnly:   true,
@@ -472,8 +463,8 @@ func (ic *interopContext) storageGetReadOnlyContext(v *vm.VM) error {
 	return nil
 }
 
-func (ic *interopContext) putWithContextAndFlags(stc *StorageContext, key []byte, value []byte, isConst bool) error {
-	if ic.trigger != trigger.Application && ic.trigger != trigger.ApplicationR {
+func putWithContextAndFlags(ic *interop.Context, stc *StorageContext, key []byte, value []byte, isConst bool) error {
+	if ic.Trigger != trigger.Application && ic.Trigger != trigger.ApplicationR {
 		return errors.New("can't delete when the trigger is not application")
 	}
 	if len(key) > MaxStorageKeyLen {
@@ -482,11 +473,11 @@ func (ic *interopContext) putWithContextAndFlags(stc *StorageContext, key []byte
 	if stc.ReadOnly {
 		return errors.New("StorageContext is read only")
 	}
-	err := ic.checkStorageContext(stc)
+	err := checkStorageContext(ic, stc)
 	if err != nil {
 		return err
 	}
-	si := ic.dao.GetStorageItem(stc.ScriptHash, key)
+	si := ic.DAO.GetStorageItem(stc.ScriptHash, key)
 	if si == nil {
 		si = &state.StorageItem{}
 	}
@@ -495,11 +486,11 @@ func (ic *interopContext) putWithContextAndFlags(stc *StorageContext, key []byte
 	}
 	si.Value = value
 	si.IsConst = isConst
-	return ic.dao.PutStorageItem(stc.ScriptHash, key, si)
+	return ic.DAO.PutStorageItem(stc.ScriptHash, key, si)
 }
 
 // storagePutInternal is a unified implementation of storagePut and storagePutEx.
-func (ic *interopContext) storagePutInternal(v *vm.VM, getFlag bool) error {
+func storagePutInternal(ic *interop.Context, v *vm.VM, getFlag bool) error {
 	stcInterface := v.Estack().Pop().Value()
 	stc, ok := stcInterface.(*StorageContext)
 	if !ok {
@@ -511,21 +502,21 @@ func (ic *interopContext) storagePutInternal(v *vm.VM, getFlag bool) error {
 	if getFlag {
 		flag = int(v.Estack().Pop().BigInt().Int64())
 	}
-	return ic.putWithContextAndFlags(stc, key, value, flag == 1)
+	return putWithContextAndFlags(ic, stc, key, value, flag == 1)
 }
 
 // storagePut puts key-value pair into the storage.
-func (ic *interopContext) storagePut(v *vm.VM) error {
-	return ic.storagePutInternal(v, false)
+func storagePut(ic *interop.Context, v *vm.VM) error {
+	return storagePutInternal(ic, v, false)
 }
 
 // storagePutEx puts key-value pair with given flags into the storage.
-func (ic *interopContext) storagePutEx(v *vm.VM) error {
-	return ic.storagePutInternal(v, true)
+func storagePutEx(ic *interop.Context, v *vm.VM) error {
+	return storagePutInternal(ic, v, true)
 }
 
 // storageContextAsReadOnly sets given context to read-only mode.
-func (ic *interopContext) storageContextAsReadOnly(v *vm.VM) error {
+func storageContextAsReadOnly(ic *interop.Context, v *vm.VM) error {
 	stcInterface := v.Estack().Pop().Value()
 	stc, ok := stcInterface.(*StorageContext)
 	if !ok {
@@ -543,39 +534,39 @@ func (ic *interopContext) storageContextAsReadOnly(v *vm.VM) error {
 }
 
 // contractDestroy destroys a contract.
-func (ic *interopContext) contractDestroy(v *vm.VM) error {
-	if ic.trigger != trigger.Application {
+func contractDestroy(ic *interop.Context, v *vm.VM) error {
+	if ic.Trigger != trigger.Application {
 		return errors.New("can't destroy contract when not triggered by application")
 	}
 	hash := getContextScriptHash(v, 0)
-	cs, err := ic.dao.GetContractState(hash)
+	cs, err := ic.DAO.GetContractState(hash)
 	if err != nil {
 		return nil
 	}
-	err = ic.dao.DeleteContractState(hash)
+	err = ic.DAO.DeleteContractState(hash)
 	if err != nil {
 		return err
 	}
 	if cs.HasStorage() {
-		siMap, err := ic.dao.GetStorageItems(hash)
+		siMap, err := ic.DAO.GetStorageItems(hash)
 		if err != nil {
 			return err
 		}
 		for k := range siMap {
-			_ = ic.dao.DeleteStorageItem(hash, []byte(k))
+			_ = ic.DAO.DeleteStorageItem(hash, []byte(k))
 		}
 	}
 	return nil
 }
 
 // contractGetStorageContext retrieves StorageContext of a contract.
-func (ic *interopContext) contractGetStorageContext(v *vm.VM) error {
+func contractGetStorageContext(ic *interop.Context, v *vm.VM) error {
 	csInterface := v.Estack().Pop().Value()
 	cs, ok := csInterface.(*state.Contract)
 	if !ok {
 		return fmt.Errorf("%T is not a contract state", cs)
 	}
-	contractState, err := ic.dao.GetContractState(cs.ScriptHash())
+	contractState, err := ic.DAO.GetContractState(cs.ScriptHash())
 	if contractState == nil || err != nil {
 		return fmt.Errorf("contract was not created in this transaction")
 	}
diff --git a/pkg/core/interops.go b/pkg/core/interops.go
index 445be4d76..edcdb3310 100644
--- a/pkg/core/interops.go
+++ b/pkg/core/interops.go
@@ -10,274 +10,246 @@ package core
 import (
 	"sort"
 
-	"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/transaction"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop/enumerator"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop/iterator"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
-	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 	"github.com/nspcc-dev/neo-go/pkg/vm"
-	"go.uber.org/zap"
 )
 
-type interopContext struct {
-	bc            Blockchainer
-	trigger       trigger.Type
-	block         *block.Block
-	tx            *transaction.Transaction
-	dao           *dao.Cached
-	notifications []state.NotificationEvent
-	log           *zap.Logger
-}
-
-func newInteropContext(trigger trigger.Type, bc Blockchainer, d dao.DAO, block *block.Block, tx *transaction.Transaction, log *zap.Logger) *interopContext {
-	dao := dao.NewCached(d)
-	nes := make([]state.NotificationEvent, 0)
-	return &interopContext{bc, trigger, block, tx, dao, nes, log}
-}
-
 // SpawnVM returns a VM with script getter and interop functions set
 // up for current blockchain.
-func (ic *interopContext) SpawnVM() *vm.VM {
+func SpawnVM(ic *interop.Context) *vm.VM {
 	vm := vm.New()
 	vm.SetScriptGetter(func(hash util.Uint160) ([]byte, bool) {
-		cs, err := ic.dao.GetContractState(hash)
+		cs, err := ic.DAO.GetContractState(hash)
 		if err != nil {
 			return nil, false
 		}
 		hasDynamicInvoke := (cs.Properties & smartcontract.HasDynamicInvoke) != 0
 		return cs.Script, hasDynamicInvoke
 	})
-	vm.RegisterInteropGetter(ic.getSystemInterop)
-	vm.RegisterInteropGetter(ic.getNeoInterop)
+	vm.RegisterInteropGetter(getSystemInterop(ic))
+	vm.RegisterInteropGetter(getNeoInterop(ic))
 	return vm
 }
 
-// interopedFunction binds function name, id with the function itself and price,
-// it's supposed to be inited once for all interopContexts, so it doesn't use
-// vm.InteropFuncPrice directly.
-type interopedFunction struct {
-	ID    uint32
-	Name  string
-	Func  func(*interopContext, *vm.VM) error
-	Price int
-}
-
 // getSystemInterop returns matching interop function from the System namespace
 // for a given id in the current context.
-func (ic *interopContext) getSystemInterop(id uint32) *vm.InteropFuncPrice {
-	return ic.getInteropFromSlice(id, systemInterops)
+func getSystemInterop(ic *interop.Context) vm.InteropGetterFunc {
+	return getInteropFromSlice(ic, systemInterops)
 }
 
 // getNeoInterop returns matching interop function from the Neo and AntShares
 // namespaces for a given id in the current context.
-func (ic *interopContext) getNeoInterop(id uint32) *vm.InteropFuncPrice {
-	return ic.getInteropFromSlice(id, neoInterops)
+func getNeoInterop(ic *interop.Context) vm.InteropGetterFunc {
+	return getInteropFromSlice(ic, neoInterops)
 }
 
 // getInteropFromSlice returns matching interop function from the given slice of
 // interop functions in the current context.
-func (ic *interopContext) getInteropFromSlice(id uint32, slice []interopedFunction) *vm.InteropFuncPrice {
-	n := sort.Search(len(slice), func(i int) bool {
-		return slice[i].ID >= id
-	})
-	if n < len(slice) && slice[n].ID == id {
-		// Currying, yay!
-		return &vm.InteropFuncPrice{Func: func(v *vm.VM) error {
-			return slice[n].Func(ic, v)
-		}, Price: slice[n].Price}
+func getInteropFromSlice(ic *interop.Context, slice []interop.Function) func(uint32) *vm.InteropFuncPrice {
+	return func(id uint32) *vm.InteropFuncPrice {
+		n := sort.Search(len(slice), func(i int) bool {
+			return slice[i].ID >= id
+		})
+		if n < len(slice) && slice[n].ID == id {
+			return &vm.InteropFuncPrice{Func: func(v *vm.VM) error {
+				return slice[n].Func(ic, v)
+			}, Price: slice[n].Price}
+		}
+		return nil
 	}
-	return nil
 }
 
 // All lists are sorted, keep 'em this way, please.
-var systemInterops = []interopedFunction{
-	{Name: "System.Block.GetTransaction", Func: (*interopContext).blockGetTransaction, Price: 1},
-	{Name: "System.Block.GetTransactionCount", Func: (*interopContext).blockGetTransactionCount, Price: 1},
-	{Name: "System.Block.GetTransactions", Func: (*interopContext).blockGetTransactions, Price: 1},
-	{Name: "System.Blockchain.GetBlock", Func: (*interopContext).bcGetBlock, Price: 200},
-	{Name: "System.Blockchain.GetContract", Func: (*interopContext).bcGetContract, Price: 100},
-	{Name: "System.Blockchain.GetHeader", Func: (*interopContext).bcGetHeader, Price: 100},
-	{Name: "System.Blockchain.GetHeight", Func: (*interopContext).bcGetHeight, Price: 1},
-	{Name: "System.Blockchain.GetTransaction", Func: (*interopContext).bcGetTransaction, Price: 200},
-	{Name: "System.Blockchain.GetTransactionHeight", Func: (*interopContext).bcGetTransactionHeight, Price: 100},
-	{Name: "System.Contract.Destroy", Func: (*interopContext).contractDestroy, Price: 1},
-	{Name: "System.Contract.GetStorageContext", Func: (*interopContext).contractGetStorageContext, Price: 1},
-	{Name: "System.ExecutionEngine.GetCallingScriptHash", Func: (*interopContext).engineGetCallingScriptHash, Price: 1},
-	{Name: "System.ExecutionEngine.GetEntryScriptHash", Func: (*interopContext).engineGetEntryScriptHash, Price: 1},
-	{Name: "System.ExecutionEngine.GetExecutingScriptHash", Func: (*interopContext).engineGetExecutingScriptHash, Price: 1},
-	{Name: "System.ExecutionEngine.GetScriptContainer", Func: (*interopContext).engineGetScriptContainer, Price: 1},
-	{Name: "System.Header.GetHash", Func: (*interopContext).headerGetHash, Price: 1},
-	{Name: "System.Header.GetIndex", Func: (*interopContext).headerGetIndex, Price: 1},
-	{Name: "System.Header.GetPrevHash", Func: (*interopContext).headerGetPrevHash, Price: 1},
-	{Name: "System.Header.GetTimestamp", Func: (*interopContext).headerGetTimestamp, Price: 1},
-	{Name: "System.Runtime.CheckWitness", Func: (*interopContext).runtimeCheckWitness, Price: 200},
-	{Name: "System.Runtime.Deserialize", Func: (*interopContext).runtimeDeserialize, Price: 1},
-	{Name: "System.Runtime.GetTime", Func: (*interopContext).runtimeGetTime, Price: 1},
-	{Name: "System.Runtime.GetTrigger", Func: (*interopContext).runtimeGetTrigger, Price: 1},
-	{Name: "System.Runtime.Log", Func: (*interopContext).runtimeLog, Price: 1},
-	{Name: "System.Runtime.Notify", Func: (*interopContext).runtimeNotify, Price: 1},
-	{Name: "System.Runtime.Platform", Func: (*interopContext).runtimePlatform, Price: 1},
-	{Name: "System.Runtime.Serialize", Func: (*interopContext).runtimeSerialize, Price: 1},
-	{Name: "System.Storage.Delete", Func: (*interopContext).storageDelete, Price: 100},
-	{Name: "System.Storage.Get", Func: (*interopContext).storageGet, Price: 100},
-	{Name: "System.Storage.GetContext", Func: (*interopContext).storageGetContext, Price: 1},
-	{Name: "System.Storage.GetReadOnlyContext", Func: (*interopContext).storageGetReadOnlyContext, Price: 1},
-	{Name: "System.Storage.Put", Func: (*interopContext).storagePut, Price: 0}, // These don't have static price in C# code.
-	{Name: "System.Storage.PutEx", Func: (*interopContext).storagePutEx, Price: 0},
-	{Name: "System.StorageContext.AsReadOnly", Func: (*interopContext).storageContextAsReadOnly, Price: 1},
-	{Name: "System.Transaction.GetHash", Func: (*interopContext).txGetHash, Price: 1},
+var systemInterops = []interop.Function{
+	{Name: "System.Block.GetTransaction", Func: blockGetTransaction, Price: 1},
+	{Name: "System.Block.GetTransactionCount", Func: blockGetTransactionCount, Price: 1},
+	{Name: "System.Block.GetTransactions", Func: blockGetTransactions, Price: 1},
+	{Name: "System.Blockchain.GetBlock", Func: bcGetBlock, Price: 200},
+	{Name: "System.Blockchain.GetContract", Func: bcGetContract, Price: 100},
+	{Name: "System.Blockchain.GetHeader", Func: bcGetHeader, Price: 100},
+	{Name: "System.Blockchain.GetHeight", Func: bcGetHeight, Price: 1},
+	{Name: "System.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 200},
+	{Name: "System.Blockchain.GetTransactionHeight", Func: bcGetTransactionHeight, Price: 100},
+	{Name: "System.Contract.Destroy", Func: contractDestroy, Price: 1},
+	{Name: "System.Contract.GetStorageContext", Func: contractGetStorageContext, Price: 1},
+	{Name: "System.ExecutionEngine.GetCallingScriptHash", Func: engineGetCallingScriptHash, Price: 1},
+	{Name: "System.ExecutionEngine.GetEntryScriptHash", Func: engineGetEntryScriptHash, Price: 1},
+	{Name: "System.ExecutionEngine.GetExecutingScriptHash", Func: engineGetExecutingScriptHash, Price: 1},
+	{Name: "System.ExecutionEngine.GetScriptContainer", Func: engineGetScriptContainer, Price: 1},
+	{Name: "System.Header.GetHash", Func: headerGetHash, Price: 1},
+	{Name: "System.Header.GetIndex", Func: headerGetIndex, Price: 1},
+	{Name: "System.Header.GetPrevHash", Func: headerGetPrevHash, Price: 1},
+	{Name: "System.Header.GetTimestamp", Func: headerGetTimestamp, Price: 1},
+	{Name: "System.Runtime.CheckWitness", Func: runtimeCheckWitness, Price: 200},
+	{Name: "System.Runtime.Deserialize", Func: runtimeDeserialize, Price: 1},
+	{Name: "System.Runtime.GetTime", Func: runtimeGetTime, Price: 1},
+	{Name: "System.Runtime.GetTrigger", Func: runtimeGetTrigger, Price: 1},
+	{Name: "System.Runtime.Log", Func: runtimeLog, Price: 1},
+	{Name: "System.Runtime.Notify", Func: runtimeNotify, Price: 1},
+	{Name: "System.Runtime.Platform", Func: runtimePlatform, Price: 1},
+	{Name: "System.Runtime.Serialize", Func: runtimeSerialize, Price: 1},
+	{Name: "System.Storage.Delete", Func: storageDelete, Price: 100},
+	{Name: "System.Storage.Get", Func: storageGet, Price: 100},
+	{Name: "System.Storage.GetContext", Func: storageGetContext, Price: 1},
+	{Name: "System.Storage.GetReadOnlyContext", Func: storageGetReadOnlyContext, Price: 1},
+	{Name: "System.Storage.Put", Func: storagePut, Price: 0}, // These don't have static price in C# code.
+	{Name: "System.Storage.PutEx", Func: storagePutEx, Price: 0},
+	{Name: "System.StorageContext.AsReadOnly", Func: storageContextAsReadOnly, Price: 1},
+	{Name: "System.Transaction.GetHash", Func: txGetHash, Price: 1},
 }
 
-var neoInterops = []interopedFunction{
-	{Name: "Neo.Account.GetBalance", Func: (*interopContext).accountGetBalance, Price: 1},
-	{Name: "Neo.Account.GetScriptHash", Func: (*interopContext).accountGetScriptHash, Price: 1},
-	{Name: "Neo.Account.GetVotes", Func: (*interopContext).accountGetVotes, Price: 1},
-	{Name: "Neo.Account.IsStandard", Func: (*interopContext).accountIsStandard, Price: 100},
-	{Name: "Neo.Asset.Create", Func: (*interopContext).assetCreate, Price: 0},
-	{Name: "Neo.Asset.GetAdmin", Func: (*interopContext).assetGetAdmin, Price: 1},
-	{Name: "Neo.Asset.GetAmount", Func: (*interopContext).assetGetAmount, Price: 1},
-	{Name: "Neo.Asset.GetAssetId", Func: (*interopContext).assetGetAssetID, Price: 1},
-	{Name: "Neo.Asset.GetAssetType", Func: (*interopContext).assetGetAssetType, Price: 1},
-	{Name: "Neo.Asset.GetAvailable", Func: (*interopContext).assetGetAvailable, Price: 1},
-	{Name: "Neo.Asset.GetIssuer", Func: (*interopContext).assetGetIssuer, Price: 1},
-	{Name: "Neo.Asset.GetOwner", Func: (*interopContext).assetGetOwner, Price: 1},
-	{Name: "Neo.Asset.GetPrecision", Func: (*interopContext).assetGetPrecision, Price: 1},
-	{Name: "Neo.Asset.Renew", Func: (*interopContext).assetRenew, Price: 0},
-	{Name: "Neo.Attribute.GetData", Func: (*interopContext).attrGetData, Price: 1},
-	{Name: "Neo.Attribute.GetUsage", Func: (*interopContext).attrGetUsage, Price: 1},
-	{Name: "Neo.Block.GetTransaction", Func: (*interopContext).blockGetTransaction, Price: 1},
-	{Name: "Neo.Block.GetTransactionCount", Func: (*interopContext).blockGetTransactionCount, Price: 1},
-	{Name: "Neo.Block.GetTransactions", Func: (*interopContext).blockGetTransactions, Price: 1},
-	{Name: "Neo.Blockchain.GetAccount", Func: (*interopContext).bcGetAccount, Price: 100},
-	{Name: "Neo.Blockchain.GetAsset", Func: (*interopContext).bcGetAsset, Price: 100},
-	{Name: "Neo.Blockchain.GetBlock", Func: (*interopContext).bcGetBlock, Price: 200},
-	{Name: "Neo.Blockchain.GetContract", Func: (*interopContext).bcGetContract, Price: 100},
-	{Name: "Neo.Blockchain.GetHeader", Func: (*interopContext).bcGetHeader, Price: 100},
-	{Name: "Neo.Blockchain.GetHeight", Func: (*interopContext).bcGetHeight, Price: 1},
-	{Name: "Neo.Blockchain.GetTransaction", Func: (*interopContext).bcGetTransaction, Price: 100},
-	{Name: "Neo.Blockchain.GetTransactionHeight", Func: (*interopContext).bcGetTransactionHeight, Price: 100},
-	{Name: "Neo.Blockchain.GetValidators", Func: (*interopContext).bcGetValidators, Price: 200},
-	{Name: "Neo.Contract.Create", Func: (*interopContext).contractCreate, Price: 0},
-	{Name: "Neo.Contract.Destroy", Func: (*interopContext).contractDestroy, Price: 1},
-	{Name: "Neo.Contract.GetScript", Func: (*interopContext).contractGetScript, Price: 1},
-	{Name: "Neo.Contract.GetStorageContext", Func: (*interopContext).contractGetStorageContext, Price: 1},
-	{Name: "Neo.Contract.IsPayable", Func: (*interopContext).contractIsPayable, Price: 1},
-	{Name: "Neo.Contract.Migrate", Func: (*interopContext).contractMigrate, Price: 0},
-	{Name: "Neo.Enumerator.Concat", Func: (*interopContext).enumeratorConcat, Price: 1},
-	{Name: "Neo.Enumerator.Create", Func: (*interopContext).enumeratorCreate, Price: 1},
-	{Name: "Neo.Enumerator.Next", Func: (*interopContext).enumeratorNext, Price: 1},
-	{Name: "Neo.Enumerator.Value", Func: (*interopContext).enumeratorValue, Price: 1},
-	{Name: "Neo.Header.GetConsensusData", Func: (*interopContext).headerGetConsensusData, Price: 1},
-	{Name: "Neo.Header.GetHash", Func: (*interopContext).headerGetHash, Price: 1},
-	{Name: "Neo.Header.GetIndex", Func: (*interopContext).headerGetIndex, Price: 1},
-	{Name: "Neo.Header.GetMerkleRoot", Func: (*interopContext).headerGetMerkleRoot, Price: 1},
-	{Name: "Neo.Header.GetNextConsensus", Func: (*interopContext).headerGetNextConsensus, Price: 1},
-	{Name: "Neo.Header.GetPrevHash", Func: (*interopContext).headerGetPrevHash, Price: 1},
-	{Name: "Neo.Header.GetTimestamp", Func: (*interopContext).headerGetTimestamp, Price: 1},
-	{Name: "Neo.Header.GetVersion", Func: (*interopContext).headerGetVersion, Price: 1},
-	{Name: "Neo.Input.GetHash", Func: (*interopContext).inputGetHash, Price: 1},
-	{Name: "Neo.Input.GetIndex", Func: (*interopContext).inputGetIndex, Price: 1},
-	{Name: "Neo.InvocationTransaction.GetScript", Func: (*interopContext).invocationTxGetScript, Price: 1},
-	{Name: "Neo.Iterator.Concat", Func: (*interopContext).iteratorConcat, Price: 1},
-	{Name: "Neo.Iterator.Create", Func: (*interopContext).iteratorCreate, Price: 1},
-	{Name: "Neo.Iterator.Key", Func: (*interopContext).iteratorKey, Price: 1},
-	{Name: "Neo.Iterator.Keys", Func: (*interopContext).iteratorKeys, Price: 1},
-	{Name: "Neo.Iterator.Values", Func: (*interopContext).iteratorValues, Price: 1},
-	{Name: "Neo.Output.GetAssetId", Func: (*interopContext).outputGetAssetID, Price: 1},
-	{Name: "Neo.Output.GetScriptHash", Func: (*interopContext).outputGetScriptHash, Price: 1},
-	{Name: "Neo.Output.GetValue", Func: (*interopContext).outputGetValue, Price: 1},
-	{Name: "Neo.Runtime.CheckWitness", Func: (*interopContext).runtimeCheckWitness, Price: 200},
-	{Name: "Neo.Runtime.Deserialize", Func: (*interopContext).runtimeDeserialize, Price: 1},
-	{Name: "Neo.Runtime.GetTime", Func: (*interopContext).runtimeGetTime, Price: 1},
-	{Name: "Neo.Runtime.GetTrigger", Func: (*interopContext).runtimeGetTrigger, Price: 1},
-	{Name: "Neo.Runtime.Log", Func: (*interopContext).runtimeLog, Price: 1},
-	{Name: "Neo.Runtime.Notify", Func: (*interopContext).runtimeNotify, Price: 1},
-	{Name: "Neo.Runtime.Serialize", Func: (*interopContext).runtimeSerialize, Price: 1},
-	{Name: "Neo.Storage.Delete", Func: (*interopContext).storageDelete, Price: 100},
-	{Name: "Neo.Storage.Find", Func: (*interopContext).storageFind, Price: 1},
-	{Name: "Neo.Storage.Get", Func: (*interopContext).storageGet, Price: 100},
-	{Name: "Neo.Storage.GetContext", Func: (*interopContext).storageGetContext, Price: 1},
-	{Name: "Neo.Storage.GetReadOnlyContext", Func: (*interopContext).storageGetReadOnlyContext, Price: 1},
-	{Name: "Neo.Storage.Put", Func: (*interopContext).storagePut, Price: 0},
-	{Name: "Neo.StorageContext.AsReadOnly", Func: (*interopContext).storageContextAsReadOnly, Price: 1},
-	{Name: "Neo.Transaction.GetAttributes", Func: (*interopContext).txGetAttributes, Price: 1},
-	{Name: "Neo.Transaction.GetHash", Func: (*interopContext).txGetHash, Price: 1},
-	{Name: "Neo.Transaction.GetInputs", Func: (*interopContext).txGetInputs, Price: 1},
-	{Name: "Neo.Transaction.GetOutputs", Func: (*interopContext).txGetOutputs, Price: 1},
-	{Name: "Neo.Transaction.GetReferences", Func: (*interopContext).txGetReferences, Price: 200},
-	{Name: "Neo.Transaction.GetType", Func: (*interopContext).txGetType, Price: 1},
-	{Name: "Neo.Transaction.GetUnspentCoins", Func: (*interopContext).txGetUnspentCoins, Price: 200},
-	{Name: "Neo.Transaction.GetWitnesses", Func: (*interopContext).txGetWitnesses, Price: 200},
-	{Name: "Neo.Witness.GetVerificationScript", Func: (*interopContext).witnessGetVerificationScript, Price: 100},
+var neoInterops = []interop.Function{
+	{Name: "Neo.Account.GetBalance", Func: accountGetBalance, Price: 1},
+	{Name: "Neo.Account.GetScriptHash", Func: accountGetScriptHash, Price: 1},
+	{Name: "Neo.Account.GetVotes", Func: accountGetVotes, Price: 1},
+	{Name: "Neo.Account.IsStandard", Func: accountIsStandard, Price: 100},
+	{Name: "Neo.Asset.Create", Func: assetCreate, Price: 0},
+	{Name: "Neo.Asset.GetAdmin", Func: assetGetAdmin, Price: 1},
+	{Name: "Neo.Asset.GetAmount", Func: assetGetAmount, Price: 1},
+	{Name: "Neo.Asset.GetAssetId", Func: assetGetAssetID, Price: 1},
+	{Name: "Neo.Asset.GetAssetType", Func: assetGetAssetType, Price: 1},
+	{Name: "Neo.Asset.GetAvailable", Func: assetGetAvailable, Price: 1},
+	{Name: "Neo.Asset.GetIssuer", Func: assetGetIssuer, Price: 1},
+	{Name: "Neo.Asset.GetOwner", Func: assetGetOwner, Price: 1},
+	{Name: "Neo.Asset.GetPrecision", Func: assetGetPrecision, Price: 1},
+	{Name: "Neo.Asset.Renew", Func: assetRenew, Price: 0},
+	{Name: "Neo.Attribute.GetData", Func: attrGetData, Price: 1},
+	{Name: "Neo.Attribute.GetUsage", Func: attrGetUsage, Price: 1},
+	{Name: "Neo.Block.GetTransaction", Func: blockGetTransaction, Price: 1},
+	{Name: "Neo.Block.GetTransactionCount", Func: blockGetTransactionCount, Price: 1},
+	{Name: "Neo.Block.GetTransactions", Func: blockGetTransactions, Price: 1},
+	{Name: "Neo.Blockchain.GetAccount", Func: bcGetAccount, Price: 100},
+	{Name: "Neo.Blockchain.GetAsset", Func: bcGetAsset, Price: 100},
+	{Name: "Neo.Blockchain.GetBlock", Func: bcGetBlock, Price: 200},
+	{Name: "Neo.Blockchain.GetContract", Func: bcGetContract, Price: 100},
+	{Name: "Neo.Blockchain.GetHeader", Func: bcGetHeader, Price: 100},
+	{Name: "Neo.Blockchain.GetHeight", Func: bcGetHeight, Price: 1},
+	{Name: "Neo.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 100},
+	{Name: "Neo.Blockchain.GetTransactionHeight", Func: bcGetTransactionHeight, Price: 100},
+	{Name: "Neo.Blockchain.GetValidators", Func: bcGetValidators, Price: 200},
+	{Name: "Neo.Contract.Create", Func: contractCreate, Price: 0},
+	{Name: "Neo.Contract.Destroy", Func: contractDestroy, Price: 1},
+	{Name: "Neo.Contract.GetScript", Func: contractGetScript, Price: 1},
+	{Name: "Neo.Contract.GetStorageContext", Func: contractGetStorageContext, Price: 1},
+	{Name: "Neo.Contract.IsPayable", Func: contractIsPayable, Price: 1},
+	{Name: "Neo.Contract.Migrate", Func: contractMigrate, Price: 0},
+	{Name: "Neo.Enumerator.Concat", Func: enumerator.Concat, Price: 1},
+	{Name: "Neo.Enumerator.Create", Func: enumerator.Create, Price: 1},
+	{Name: "Neo.Enumerator.Next", Func: enumerator.Next, Price: 1},
+	{Name: "Neo.Enumerator.Value", Func: enumerator.Value, Price: 1},
+	{Name: "Neo.Header.GetConsensusData", Func: headerGetConsensusData, Price: 1},
+	{Name: "Neo.Header.GetHash", Func: headerGetHash, Price: 1},
+	{Name: "Neo.Header.GetIndex", Func: headerGetIndex, Price: 1},
+	{Name: "Neo.Header.GetMerkleRoot", Func: headerGetMerkleRoot, Price: 1},
+	{Name: "Neo.Header.GetNextConsensus", Func: headerGetNextConsensus, Price: 1},
+	{Name: "Neo.Header.GetPrevHash", Func: headerGetPrevHash, Price: 1},
+	{Name: "Neo.Header.GetTimestamp", Func: headerGetTimestamp, Price: 1},
+	{Name: "Neo.Header.GetVersion", Func: headerGetVersion, Price: 1},
+	{Name: "Neo.Input.GetHash", Func: inputGetHash, Price: 1},
+	{Name: "Neo.Input.GetIndex", Func: inputGetIndex, Price: 1},
+	{Name: "Neo.InvocationTransaction.GetScript", Func: invocationTxGetScript, Price: 1},
+	{Name: "Neo.Iterator.Concat", Func: iterator.Concat, Price: 1},
+	{Name: "Neo.Iterator.Create", Func: iterator.Create, Price: 1},
+	{Name: "Neo.Iterator.Key", Func: iterator.Key, Price: 1},
+	{Name: "Neo.Iterator.Keys", Func: iterator.Keys, Price: 1},
+	{Name: "Neo.Iterator.Values", Func: iterator.Values, Price: 1},
+	{Name: "Neo.Output.GetAssetId", Func: outputGetAssetID, Price: 1},
+	{Name: "Neo.Output.GetScriptHash", Func: outputGetScriptHash, Price: 1},
+	{Name: "Neo.Output.GetValue", Func: outputGetValue, Price: 1},
+	{Name: "Neo.Runtime.CheckWitness", Func: runtimeCheckWitness, Price: 200},
+	{Name: "Neo.Runtime.Deserialize", Func: runtimeDeserialize, Price: 1},
+	{Name: "Neo.Runtime.GetTime", Func: runtimeGetTime, Price: 1},
+	{Name: "Neo.Runtime.GetTrigger", Func: runtimeGetTrigger, Price: 1},
+	{Name: "Neo.Runtime.Log", Func: runtimeLog, Price: 1},
+	{Name: "Neo.Runtime.Notify", Func: runtimeNotify, Price: 1},
+	{Name: "Neo.Runtime.Serialize", Func: runtimeSerialize, Price: 1},
+	{Name: "Neo.Storage.Delete", Func: storageDelete, Price: 100},
+	{Name: "Neo.Storage.Find", Func: storageFind, Price: 1},
+	{Name: "Neo.Storage.Get", Func: storageGet, Price: 100},
+	{Name: "Neo.Storage.GetContext", Func: storageGetContext, Price: 1},
+	{Name: "Neo.Storage.GetReadOnlyContext", Func: storageGetReadOnlyContext, Price: 1},
+	{Name: "Neo.Storage.Put", Func: storagePut, Price: 0},
+	{Name: "Neo.StorageContext.AsReadOnly", Func: storageContextAsReadOnly, Price: 1},
+	{Name: "Neo.Transaction.GetAttributes", Func: txGetAttributes, Price: 1},
+	{Name: "Neo.Transaction.GetHash", Func: txGetHash, Price: 1},
+	{Name: "Neo.Transaction.GetInputs", Func: txGetInputs, Price: 1},
+	{Name: "Neo.Transaction.GetOutputs", Func: txGetOutputs, Price: 1},
+	{Name: "Neo.Transaction.GetReferences", Func: txGetReferences, Price: 200},
+	{Name: "Neo.Transaction.GetType", Func: txGetType, Price: 1},
+	{Name: "Neo.Transaction.GetUnspentCoins", Func: txGetUnspentCoins, Price: 200},
+	{Name: "Neo.Transaction.GetWitnesses", Func: txGetWitnesses, Price: 200},
+	{Name: "Neo.Witness.GetVerificationScript", Func: witnessGetVerificationScript, Price: 100},
 
 	// Aliases.
-	{Name: "Neo.Iterator.Next", Func: (*interopContext).enumeratorNext, Price: 1},
-	{Name: "Neo.Iterator.Value", Func: (*interopContext).enumeratorValue, Price: 1},
+	{Name: "Neo.Iterator.Next", Func: enumerator.Next, Price: 1},
+	{Name: "Neo.Iterator.Value", Func: enumerator.Value, Price: 1},
 
 	// Old compatibility APIs.
-	{Name: "AntShares.Account.GetBalance", Func: (*interopContext).accountGetBalance, Price: 1},
-	{Name: "AntShares.Account.GetScriptHash", Func: (*interopContext).accountGetScriptHash, Price: 1},
-	{Name: "AntShares.Account.GetVotes", Func: (*interopContext).accountGetVotes, Price: 1},
-	{Name: "AntShares.Asset.Create", Func: (*interopContext).assetCreate, Price: 0},
-	{Name: "AntShares.Asset.GetAdmin", Func: (*interopContext).assetGetAdmin, Price: 1},
-	{Name: "AntShares.Asset.GetAmount", Func: (*interopContext).assetGetAmount, Price: 1},
-	{Name: "AntShares.Asset.GetAssetId", Func: (*interopContext).assetGetAssetID, Price: 1},
-	{Name: "AntShares.Asset.GetAssetType", Func: (*interopContext).assetGetAssetType, Price: 1},
-	{Name: "AntShares.Asset.GetAvailable", Func: (*interopContext).assetGetAvailable, Price: 1},
-	{Name: "AntShares.Asset.GetIssuer", Func: (*interopContext).assetGetIssuer, Price: 1},
-	{Name: "AntShares.Asset.GetOwner", Func: (*interopContext).assetGetOwner, Price: 1},
-	{Name: "AntShares.Asset.GetPrecision", Func: (*interopContext).assetGetPrecision, Price: 1},
-	{Name: "AntShares.Asset.Renew", Func: (*interopContext).assetRenew, Price: 0},
-	{Name: "AntShares.Attribute.GetData", Func: (*interopContext).attrGetData, Price: 1},
-	{Name: "AntShares.Attribute.GetUsage", Func: (*interopContext).attrGetUsage, Price: 1},
-	{Name: "AntShares.Block.GetTransaction", Func: (*interopContext).blockGetTransaction, Price: 1},
-	{Name: "AntShares.Block.GetTransactionCount", Func: (*interopContext).blockGetTransactionCount, Price: 1},
-	{Name: "AntShares.Block.GetTransactions", Func: (*interopContext).blockGetTransactions, Price: 1},
-	{Name: "AntShares.Blockchain.GetAccount", Func: (*interopContext).bcGetAccount, Price: 100},
-	{Name: "AntShares.Blockchain.GetAsset", Func: (*interopContext).bcGetAsset, Price: 100},
-	{Name: "AntShares.Blockchain.GetBlock", Func: (*interopContext).bcGetBlock, Price: 200},
-	{Name: "AntShares.Blockchain.GetContract", Func: (*interopContext).bcGetContract, Price: 100},
-	{Name: "AntShares.Blockchain.GetHeader", Func: (*interopContext).bcGetHeader, Price: 100},
-	{Name: "AntShares.Blockchain.GetHeight", Func: (*interopContext).bcGetHeight, Price: 1},
-	{Name: "AntShares.Blockchain.GetTransaction", Func: (*interopContext).bcGetTransaction, Price: 100},
-	{Name: "AntShares.Blockchain.GetValidators", Func: (*interopContext).bcGetValidators, Price: 200},
-	{Name: "AntShares.Contract.Create", Func: (*interopContext).contractCreate, Price: 0},
-	{Name: "AntShares.Contract.Destroy", Func: (*interopContext).contractDestroy, Price: 1},
-	{Name: "AntShares.Contract.GetScript", Func: (*interopContext).contractGetScript, Price: 1},
-	{Name: "AntShares.Contract.GetStorageContext", Func: (*interopContext).contractGetStorageContext, Price: 1},
-	{Name: "AntShares.Contract.Migrate", Func: (*interopContext).contractMigrate, Price: 0},
-	{Name: "AntShares.Header.GetConsensusData", Func: (*interopContext).headerGetConsensusData, Price: 1},
-	{Name: "AntShares.Header.GetHash", Func: (*interopContext).headerGetHash, Price: 1},
-	{Name: "AntShares.Header.GetMerkleRoot", Func: (*interopContext).headerGetMerkleRoot, Price: 1},
-	{Name: "AntShares.Header.GetNextConsensus", Func: (*interopContext).headerGetNextConsensus, Price: 1},
-	{Name: "AntShares.Header.GetPrevHash", Func: (*interopContext).headerGetPrevHash, Price: 1},
-	{Name: "AntShares.Header.GetTimestamp", Func: (*interopContext).headerGetTimestamp, Price: 1},
-	{Name: "AntShares.Header.GetVersion", Func: (*interopContext).headerGetVersion, Price: 1},
-	{Name: "AntShares.Input.GetHash", Func: (*interopContext).inputGetHash, Price: 1},
-	{Name: "AntShares.Input.GetIndex", Func: (*interopContext).inputGetIndex, Price: 1},
-	{Name: "AntShares.Output.GetAssetId", Func: (*interopContext).outputGetAssetID, Price: 1},
-	{Name: "AntShares.Output.GetScriptHash", Func: (*interopContext).outputGetScriptHash, Price: 1},
-	{Name: "AntShares.Output.GetValue", Func: (*interopContext).outputGetValue, Price: 1},
-	{Name: "AntShares.Runtime.CheckWitness", Func: (*interopContext).runtimeCheckWitness, Price: 200},
-	{Name: "AntShares.Runtime.Log", Func: (*interopContext).runtimeLog, Price: 1},
-	{Name: "AntShares.Runtime.Notify", Func: (*interopContext).runtimeNotify, Price: 1},
-	{Name: "AntShares.Storage.Delete", Func: (*interopContext).storageDelete, Price: 100},
-	{Name: "AntShares.Storage.Get", Func: (*interopContext).storageGet, Price: 100},
-	{Name: "AntShares.Storage.GetContext", Func: (*interopContext).storageGetContext, Price: 1},
-	{Name: "AntShares.Storage.Put", Func: (*interopContext).storagePut, Price: 0},
-	{Name: "AntShares.Transaction.GetAttributes", Func: (*interopContext).txGetAttributes, Price: 1},
-	{Name: "AntShares.Transaction.GetHash", Func: (*interopContext).txGetHash, Price: 1},
-	{Name: "AntShares.Transaction.GetInputs", Func: (*interopContext).txGetInputs, Price: 1},
-	{Name: "AntShares.Transaction.GetOutputs", Func: (*interopContext).txGetOutputs, Price: 1},
-	{Name: "AntShares.Transaction.GetReferences", Func: (*interopContext).txGetReferences, Price: 200},
-	{Name: "AntShares.Transaction.GetType", Func: (*interopContext).txGetType, Price: 1},
+	{Name: "AntShares.Account.GetBalance", Func: accountGetBalance, Price: 1},
+	{Name: "AntShares.Account.GetScriptHash", Func: accountGetScriptHash, Price: 1},
+	{Name: "AntShares.Account.GetVotes", Func: accountGetVotes, Price: 1},
+	{Name: "AntShares.Asset.Create", Func: assetCreate, Price: 0},
+	{Name: "AntShares.Asset.GetAdmin", Func: assetGetAdmin, Price: 1},
+	{Name: "AntShares.Asset.GetAmount", Func: assetGetAmount, Price: 1},
+	{Name: "AntShares.Asset.GetAssetId", Func: assetGetAssetID, Price: 1},
+	{Name: "AntShares.Asset.GetAssetType", Func: assetGetAssetType, Price: 1},
+	{Name: "AntShares.Asset.GetAvailable", Func: assetGetAvailable, Price: 1},
+	{Name: "AntShares.Asset.GetIssuer", Func: assetGetIssuer, Price: 1},
+	{Name: "AntShares.Asset.GetOwner", Func: assetGetOwner, Price: 1},
+	{Name: "AntShares.Asset.GetPrecision", Func: assetGetPrecision, Price: 1},
+	{Name: "AntShares.Asset.Renew", Func: assetRenew, Price: 0},
+	{Name: "AntShares.Attribute.GetData", Func: attrGetData, Price: 1},
+	{Name: "AntShares.Attribute.GetUsage", Func: attrGetUsage, Price: 1},
+	{Name: "AntShares.Block.GetTransaction", Func: blockGetTransaction, Price: 1},
+	{Name: "AntShares.Block.GetTransactionCount", Func: blockGetTransactionCount, Price: 1},
+	{Name: "AntShares.Block.GetTransactions", Func: blockGetTransactions, Price: 1},
+	{Name: "AntShares.Blockchain.GetAccount", Func: bcGetAccount, Price: 100},
+	{Name: "AntShares.Blockchain.GetAsset", Func: bcGetAsset, Price: 100},
+	{Name: "AntShares.Blockchain.GetBlock", Func: bcGetBlock, Price: 200},
+	{Name: "AntShares.Blockchain.GetContract", Func: bcGetContract, Price: 100},
+	{Name: "AntShares.Blockchain.GetHeader", Func: bcGetHeader, Price: 100},
+	{Name: "AntShares.Blockchain.GetHeight", Func: bcGetHeight, Price: 1},
+	{Name: "AntShares.Blockchain.GetTransaction", Func: bcGetTransaction, Price: 100},
+	{Name: "AntShares.Blockchain.GetValidators", Func: bcGetValidators, Price: 200},
+	{Name: "AntShares.Contract.Create", Func: contractCreate, Price: 0},
+	{Name: "AntShares.Contract.Destroy", Func: contractDestroy, Price: 1},
+	{Name: "AntShares.Contract.GetScript", Func: contractGetScript, Price: 1},
+	{Name: "AntShares.Contract.GetStorageContext", Func: contractGetStorageContext, Price: 1},
+	{Name: "AntShares.Contract.Migrate", Func: contractMigrate, Price: 0},
+	{Name: "AntShares.Header.GetConsensusData", Func: headerGetConsensusData, Price: 1},
+	{Name: "AntShares.Header.GetHash", Func: headerGetHash, Price: 1},
+	{Name: "AntShares.Header.GetMerkleRoot", Func: headerGetMerkleRoot, Price: 1},
+	{Name: "AntShares.Header.GetNextConsensus", Func: headerGetNextConsensus, Price: 1},
+	{Name: "AntShares.Header.GetPrevHash", Func: headerGetPrevHash, Price: 1},
+	{Name: "AntShares.Header.GetTimestamp", Func: headerGetTimestamp, Price: 1},
+	{Name: "AntShares.Header.GetVersion", Func: headerGetVersion, Price: 1},
+	{Name: "AntShares.Input.GetHash", Func: inputGetHash, Price: 1},
+	{Name: "AntShares.Input.GetIndex", Func: inputGetIndex, Price: 1},
+	{Name: "AntShares.Output.GetAssetId", Func: outputGetAssetID, Price: 1},
+	{Name: "AntShares.Output.GetScriptHash", Func: outputGetScriptHash, Price: 1},
+	{Name: "AntShares.Output.GetValue", Func: outputGetValue, Price: 1},
+	{Name: "AntShares.Runtime.CheckWitness", Func: runtimeCheckWitness, Price: 200},
+	{Name: "AntShares.Runtime.Log", Func: runtimeLog, Price: 1},
+	{Name: "AntShares.Runtime.Notify", Func: runtimeNotify, Price: 1},
+	{Name: "AntShares.Storage.Delete", Func: storageDelete, Price: 100},
+	{Name: "AntShares.Storage.Get", Func: storageGet, Price: 100},
+	{Name: "AntShares.Storage.GetContext", Func: storageGetContext, Price: 1},
+	{Name: "AntShares.Storage.Put", Func: storagePut, Price: 0},
+	{Name: "AntShares.Transaction.GetAttributes", Func: txGetAttributes, Price: 1},
+	{Name: "AntShares.Transaction.GetHash", Func: txGetHash, Price: 1},
+	{Name: "AntShares.Transaction.GetInputs", Func: txGetInputs, Price: 1},
+	{Name: "AntShares.Transaction.GetOutputs", Func: txGetOutputs, Price: 1},
+	{Name: "AntShares.Transaction.GetReferences", Func: txGetReferences, Price: 200},
+	{Name: "AntShares.Transaction.GetType", Func: txGetType, Price: 1},
 }
 
 // initIDinInteropsSlice initializes IDs from names in one given
-// interopedFunction slice and then sorts it.
-func initIDinInteropsSlice(iops []interopedFunction) {
+// Function slice and then sorts it.
+func initIDinInteropsSlice(iops []interop.Function) {
 	for i := range iops {
 		iops[i].ID = vm.InteropNameToID([]byte(iops[i].Name))
 	}
diff --git a/pkg/core/interops_test.go b/pkg/core/interops_test.go
index ec4f1fa03..2f7b47b74 100644
--- a/pkg/core/interops_test.go
+++ b/pkg/core/interops_test.go
@@ -6,13 +6,14 @@ import (
 	"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"
 )
 
-func testNonInterop(t *testing.T, value interface{}, f func(*interopContext, *vm.VM) error) {
+func testNonInterop(t *testing.T, value interface{}, f func(*interop.Context, *vm.VM) error) {
 	v := vm.New()
 	v.Estack().PushVal(value)
 	chain := newTestChain(t)
@@ -30,56 +31,56 @@ func TestUnexpectedNonInterops(t *testing.T) {
 	}
 
 	// All of these functions expect an interop item on the stack.
-	funcs := []func(*interopContext, *vm.VM) error{
-		(*interopContext).accountGetBalance,
-		(*interopContext).accountGetScriptHash,
-		(*interopContext).accountGetVotes,
-		(*interopContext).assetGetAdmin,
-		(*interopContext).assetGetAmount,
-		(*interopContext).assetGetAssetID,
-		(*interopContext).assetGetAssetType,
-		(*interopContext).assetGetAvailable,
-		(*interopContext).assetGetIssuer,
-		(*interopContext).assetGetOwner,
-		(*interopContext).assetGetPrecision,
-		(*interopContext).assetRenew,
-		(*interopContext).attrGetData,
-		(*interopContext).attrGetUsage,
-		(*interopContext).blockGetTransaction,
-		(*interopContext).blockGetTransactionCount,
-		(*interopContext).blockGetTransactions,
-		(*interopContext).contractGetScript,
-		(*interopContext).contractGetStorageContext,
-		(*interopContext).contractIsPayable,
-		(*interopContext).headerGetConsensusData,
-		(*interopContext).headerGetHash,
-		(*interopContext).headerGetIndex,
-		(*interopContext).headerGetMerkleRoot,
-		(*interopContext).headerGetNextConsensus,
-		(*interopContext).headerGetPrevHash,
-		(*interopContext).headerGetTimestamp,
-		(*interopContext).headerGetVersion,
-		(*interopContext).inputGetHash,
-		(*interopContext).inputGetIndex,
-		(*interopContext).invocationTxGetScript,
-		(*interopContext).outputGetAssetID,
-		(*interopContext).outputGetScriptHash,
-		(*interopContext).outputGetValue,
-		(*interopContext).storageContextAsReadOnly,
-		(*interopContext).storageDelete,
-		(*interopContext).storageFind,
-		(*interopContext).storageGet,
-		(*interopContext).storagePut,
-		(*interopContext).storagePutEx,
-		(*interopContext).txGetAttributes,
-		(*interopContext).txGetHash,
-		(*interopContext).txGetInputs,
-		(*interopContext).txGetOutputs,
-		(*interopContext).txGetReferences,
-		(*interopContext).txGetType,
-		(*interopContext).txGetUnspentCoins,
-		(*interopContext).txGetWitnesses,
-		(*interopContext).witnessGetVerificationScript,
+	funcs := []func(*interop.Context, *vm.VM) error{
+		accountGetBalance,
+		accountGetScriptHash,
+		accountGetVotes,
+		assetGetAdmin,
+		assetGetAmount,
+		assetGetAssetID,
+		assetGetAssetType,
+		assetGetAvailable,
+		assetGetIssuer,
+		assetGetOwner,
+		assetGetPrecision,
+		assetRenew,
+		attrGetData,
+		attrGetUsage,
+		blockGetTransaction,
+		blockGetTransactionCount,
+		blockGetTransactions,
+		contractGetScript,
+		contractGetStorageContext,
+		contractIsPayable,
+		headerGetConsensusData,
+		headerGetHash,
+		headerGetIndex,
+		headerGetMerkleRoot,
+		headerGetNextConsensus,
+		headerGetPrevHash,
+		headerGetTimestamp,
+		headerGetVersion,
+		inputGetHash,
+		inputGetIndex,
+		invocationTxGetScript,
+		outputGetAssetID,
+		outputGetScriptHash,
+		outputGetValue,
+		storageContextAsReadOnly,
+		storageDelete,
+		storageFind,
+		storageGet,
+		storagePut,
+		storagePutEx,
+		txGetAttributes,
+		txGetHash,
+		txGetInputs,
+		txGetOutputs,
+		txGetReferences,
+		txGetType,
+		txGetUnspentCoins,
+		txGetWitnesses,
+		witnessGetVerificationScript,
 	}
 	for _, f := range funcs {
 		for k, v := range vals {
diff --git a/pkg/network/blockqueue.go b/pkg/network/blockqueue.go
index 762e569fa..ed6eac1ae 100644
--- a/pkg/network/blockqueue.go
+++ b/pkg/network/blockqueue.go
@@ -2,8 +2,8 @@ package network
 
 import (
 	"github.com/Workiva/go-datastructures/queue"
-	"github.com/nspcc-dev/neo-go/pkg/core"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
+	"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
 	"go.uber.org/zap"
 )
 
@@ -11,11 +11,11 @@ type blockQueue struct {
 	log         *zap.Logger
 	queue       *queue.PriorityQueue
 	checkBlocks chan struct{}
-	chain       core.Blockchainer
+	chain       blockchainer.Blockchainer
 	relayF      func(*block.Block)
 }
 
-func newBlockQueue(capacity int, bc core.Blockchainer, log *zap.Logger, relayer func(*block.Block)) *blockQueue {
+func newBlockQueue(capacity int, bc blockchainer.Blockchainer, log *zap.Logger, relayer func(*block.Block)) *blockQueue {
 	if log == nil {
 		return nil
 	}
diff --git a/pkg/network/server.go b/pkg/network/server.go
index efd6d5e3f..729995067 100644
--- a/pkg/network/server.go
+++ b/pkg/network/server.go
@@ -13,6 +13,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/consensus"
 	"github.com/nspcc-dev/neo-go/pkg/core"
 	"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/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/network/payload"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -53,7 +54,7 @@ type (
 
 		transport Transporter
 		discovery Discoverer
-		chain     core.Blockchainer
+		chain     blockchainer.Blockchainer
 		bQueue    *blockQueue
 		consensus consensus.Service
 
@@ -84,7 +85,7 @@ func randomID() uint32 {
 }
 
 // NewServer returns a new Server, initialized with the given configuration.
-func NewServer(config ServerConfig, chain core.Blockchainer, log *zap.Logger) (*Server, error) {
+func NewServer(config ServerConfig, chain blockchainer.Blockchainer, log *zap.Logger) (*Server, error) {
 	if log == nil {
 		return nil, errors.New("logger is a required parameter")
 	}
diff --git a/pkg/rpc/response/result/block.go b/pkg/rpc/response/result/block.go
index e021cc64a..8f02a2999 100644
--- a/pkg/rpc/response/result/block.go
+++ b/pkg/rpc/response/result/block.go
@@ -5,8 +5,8 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/nspcc-dev/neo-go/pkg/core"
 	"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/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/address"
 	"github.com/nspcc-dev/neo-go/pkg/io"
@@ -50,7 +50,7 @@ type (
 )
 
 // NewBlock creates a new Block wrapper.
-func NewBlock(b *block.Block, chain core.Blockchainer) Block {
+func NewBlock(b *block.Block, chain blockchainer.Blockchainer) Block {
 	res := Block{
 		Version:           b.Version,
 		Hash:              b.Hash(),
diff --git a/pkg/rpc/response/result/block_header.go b/pkg/rpc/response/result/block_header.go
index f333d54de..886903500 100644
--- a/pkg/rpc/response/result/block_header.go
+++ b/pkg/rpc/response/result/block_header.go
@@ -3,8 +3,8 @@ package result
 import (
 	"strconv"
 
-	"github.com/nspcc-dev/neo-go/pkg/core"
 	"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/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/address"
 	"github.com/nspcc-dev/neo-go/pkg/io"
@@ -31,7 +31,7 @@ type (
 )
 
 // NewHeader creates a new Header wrapper.
-func NewHeader(h *block.Header, chain core.Blockchainer) Header {
+func NewHeader(h *block.Header, chain blockchainer.Blockchainer) Header {
 	res := Header{
 		Hash:          h.Hash(),
 		Size:          io.GetVarSize(h),
diff --git a/pkg/rpc/response/result/tx_raw_output.go b/pkg/rpc/response/result/tx_raw_output.go
index d039e2eb6..3c0269022 100644
--- a/pkg/rpc/response/result/tx_raw_output.go
+++ b/pkg/rpc/response/result/tx_raw_output.go
@@ -4,8 +4,8 @@ import (
 	"encoding/json"
 	"errors"
 
-	"github.com/nspcc-dev/neo-go/pkg/core"
 	"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/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 )
@@ -27,7 +27,7 @@ type TransactionMetadata struct {
 }
 
 // NewTransactionOutputRaw returns a new ransactionOutputRaw object.
-func NewTransactionOutputRaw(tx *transaction.Transaction, header *block.Header, chain core.Blockchainer) TransactionOutputRaw {
+func NewTransactionOutputRaw(tx *transaction.Transaction, header *block.Header, chain blockchainer.Blockchainer) TransactionOutputRaw {
 	// confirmations formula
 	confirmations := int(chain.BlockHeight() - header.Base.Index + 1)
 	// set index position
diff --git a/pkg/rpc/response/result/unclaimed.go b/pkg/rpc/response/result/unclaimed.go
index e636f5c1a..f8cd8d1a9 100644
--- a/pkg/rpc/response/result/unclaimed.go
+++ b/pkg/rpc/response/result/unclaimed.go
@@ -2,6 +2,7 @@ package result
 
 import (
 	"github.com/nspcc-dev/neo-go/pkg/core"
+	"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 )
@@ -14,7 +15,7 @@ type Unclaimed struct {
 }
 
 // NewUnclaimed creates a new Unclaimed wrapper using given Blockchainer.
-func NewUnclaimed(a *state.Account, chain core.Blockchainer) (*Unclaimed, error) {
+func NewUnclaimed(a *state.Account, chain blockchainer.Blockchainer) (*Unclaimed, error) {
 	var (
 		available   util.Fixed8
 		unavailable util.Fixed8
diff --git a/pkg/rpc/response/result/unspents.go b/pkg/rpc/response/result/unspents.go
index 623d2e1a5..9a1613b86 100644
--- a/pkg/rpc/response/result/unspents.go
+++ b/pkg/rpc/response/result/unspents.go
@@ -1,7 +1,7 @@
 package result
 
 import (
-	"github.com/nspcc-dev/neo-go/pkg/core"
+	"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 )
@@ -29,7 +29,7 @@ var GlobalAssets = map[string]string{
 }
 
 // NewUnspents creates a new Account wrapper using given Blockchainer.
-func NewUnspents(a *state.Account, chain core.Blockchainer, addr string) Unspents {
+func NewUnspents(a *state.Account, chain blockchainer.Blockchainer, addr string) Unspents {
 	res := Unspents{
 		Address: addr,
 		Balance: make([]UnspentBalanceInfo, 0, len(a.Balances)),
diff --git a/pkg/rpc/server/server.go b/pkg/rpc/server/server.go
index 3d5da1e2b..87d9e3506 100644
--- a/pkg/rpc/server/server.go
+++ b/pkg/rpc/server/server.go
@@ -10,6 +10,7 @@ import (
 	"net/http"
 	"strconv"
 
+	"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
 	"github.com/nspcc-dev/neo-go/pkg/rpc"
 
 	"github.com/nspcc-dev/neo-go/pkg/core"
@@ -35,7 +36,7 @@ type (
 	// Server represents the JSON-RPC 2.0 server.
 	Server struct {
 		*http.Server
-		chain      core.Blockchainer
+		chain      blockchainer.Blockchainer
 		config     rpc.Config
 		coreServer *network.Server
 		log        *zap.Logger
@@ -81,7 +82,7 @@ var invalidBlockHeightError = func(index int, height int) error {
 }
 
 // New creates a new Server struct.
-func New(chain core.Blockchainer, conf rpc.Config, coreServer *network.Server, log *zap.Logger) Server {
+func New(chain blockchainer.Blockchainer, conf rpc.Config, coreServer *network.Server, log *zap.Logger) Server {
 	httpServer := &http.Server{
 		Addr: conf.Address + ":" + strconv.FormatUint(uint64(conf.Port), 10),
 	}