Merge pull request #1236 from nspcc-dev/rpc/getrawmempool

rpc: update `getrawmempool` and `getrawtransaction` RPC-calls

pkg/core/blockchain.go

@@ -378,7 +378,7 @@ func (bc *Blockchain) notificationDispatcher() {
 					for ch := range executionFeed {
 						ch <- aer
 					}
-					if aer.VMState == "HALT" {
+					if aer.VMState == vm.HaltState {
 						for i := range aer.Events {
 							for ch := range notificationFeed {
 								ch <- &aer.Events[i]

pkg/core/blockchain_test.go

@@ -13,6 +13,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
 	"github.com/nspcc-dev/neo-go/pkg/io"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
 	"github.com/nspcc-dev/neo-go/pkg/vm/opcode"
 	"github.com/stretchr/testify/assert"
@@ -316,7 +317,7 @@ func TestSubscriptions(t *testing.T) {
 
 	exec := <-executionCh
 	require.Equal(t, b.Hash(), exec.TxHash)
-	require.Equal(t, exec.VMState, "HALT")
+	require.Equal(t, exec.VMState, vm.HaltState)
 
 	// 3 burn events for every tx and 1 mint for primary node
 	require.True(t, len(notificationCh) >= 4)
@@ -331,7 +332,7 @@ func TestSubscriptions(t *testing.T) {
 		require.Equal(t, txExpected, tx)
 		exec := <-executionCh
 		require.Equal(t, tx.Hash(), exec.TxHash)
-		if exec.VMState == "HALT" {
+		if exec.VMState == vm.HaltState {
 			notif := <-notificationCh
 			require.Equal(t, hash.Hash160(tx.Script), notif.ScriptHash)
 		}

pkg/core/native_contract_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract/trigger"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 	"github.com/stretchr/testify/require"
@@ -122,14 +123,14 @@ func TestNativeContract_Invoke(t *testing.T) {
 
 	res, err := chain.GetAppExecResult(tx.Hash())
 	require.NoError(t, err)
-	require.Equal(t, "HALT", res.VMState)
+	require.Equal(t, vm.HaltState, res.VMState)
 	require.Equal(t, 1, len(res.Stack))
 	require.Equal(t, smartcontract.IntegerType, res.Stack[0].Type)
 	require.EqualValues(t, 42, res.Stack[0].Value)
 
 	res, err = chain.GetAppExecResult(tx2.Hash())
 	require.NoError(t, err)
-	require.Equal(t, "FAULT", res.VMState)
+	require.Equal(t, vm.FaultState, res.VMState)
 
 	require.NoError(t, chain.persist())
 	select {

pkg/core/native_policy_test.go

@@ -12,6 +12,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/io"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
 	"github.com/nspcc-dev/neo-go/pkg/util"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
 	"github.com/stretchr/testify/require"
 )
@@ -253,7 +254,7 @@ func invokeNativePolicyMethod(chain *Blockchain, method string, args ...interfac
 }
 
 func checkResult(t *testing.T, result *state.AppExecResult, expected smartcontract.Parameter) {
-	require.Equal(t, "HALT", result.VMState)
+	require.Equal(t, vm.HaltState, result.VMState)
 	require.Equal(t, 1, len(result.Stack))
 	require.Equal(t, expected.Type, result.Stack[0].Type)
 	require.EqualValues(t, expected.Value, result.Stack[0].Value)

pkg/core/state/notification_event.go

@@ -7,6 +7,7 @@ import (
 	"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"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 )
 
@@ -23,7 +24,7 @@ type NotificationEvent struct {
 type AppExecResult struct {
 	TxHash      util.Uint256
 	Trigger     trigger.Type
-	VMState     string
+	VMState     vm.State
 	GasConsumed int64
 	Stack       []smartcontract.Parameter
 	Events      []NotificationEvent
@@ -56,7 +57,7 @@ func (ne *NotificationEvent) DecodeBinary(r *io.BinReader) {
 func (aer *AppExecResult) EncodeBinary(w *io.BinWriter) {
 	w.WriteBytes(aer.TxHash[:])
 	w.WriteB(byte(aer.Trigger))
-	w.WriteString(aer.VMState)
+	w.WriteB(byte(aer.VMState))
 	w.WriteU64LE(uint64(aer.GasConsumed))
 	w.WriteArray(aer.Stack)
 	w.WriteArray(aer.Events)
@@ -66,7 +67,7 @@ func (aer *AppExecResult) EncodeBinary(w *io.BinWriter) {
 func (aer *AppExecResult) DecodeBinary(r *io.BinReader) {
 	r.ReadBytes(aer.TxHash[:])
 	aer.Trigger = trigger.Type(r.ReadB())
-	aer.VMState = r.ReadString()
+	aer.VMState = vm.State(r.ReadB())
 	aer.GasConsumed = int64(r.ReadU64LE())
 	r.ReadArray(&aer.Stack)
 	r.ReadArray(&aer.Events)

pkg/core/state/notification_event_test.go

@@ -6,6 +6,7 @@ import (
 	"github.com/nspcc-dev/neo-go/pkg/internal/random"
 	"github.com/nspcc-dev/neo-go/pkg/internal/testserdes"
 	"github.com/nspcc-dev/neo-go/pkg/smartcontract"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
 	"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
 )
 
@@ -23,7 +24,7 @@ func TestEncodeDecodeAppExecResult(t *testing.T) {
 	appExecResult := &AppExecResult{
 		TxHash:      random.Uint256(),
 		Trigger:     1,
-		VMState:     "Hault",
+		VMState:     vm.HaltState,
 		GasConsumed: 10,
 		Stack:       []smartcontract.Parameter{},
 		Events:      []NotificationEvent{},

pkg/rpc/response/result/application_log.go

@@ -49,7 +49,7 @@ func NewApplicationLog(appExecRes *state.AppExecResult) ApplicationLog {
 	return ApplicationLog{
 		TxHash:      appExecRes.TxHash,
 		Trigger:     appExecRes.Trigger.String(),
-		VMState:     appExecRes.VMState,
+		VMState:     appExecRes.VMState.String(),
 		GasConsumed: appExecRes.GasConsumed,
 		Stack:       appExecRes.Stack,
 		Events:      events,

pkg/rpc/response/result/raw_mempool.go

@@ -0,0 +1,10 @@
+package result
+
+import "github.com/nspcc-dev/neo-go/pkg/util"
+
+// RawMempool represents a result of getrawmempool RPC call.
+type RawMempool struct {
+	Height     uint32         `json:"height"`
+	Verified   []util.Uint256 `json:"verified"`
+	Unverified []util.Uint256 `json:"unverified"`
+}

pkg/rpc/response/result/tx_raw_output.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
+	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/util"
 )
@@ -22,10 +23,11 @@ type TransactionMetadata struct {
 	Blockhash     util.Uint256 `json:"blockhash,omitempty"`
 	Confirmations int          `json:"confirmations,omitempty"`
 	Timestamp     uint64       `json:"blocktime,omitempty"`
+	VMState       string       `json:"vmstate"`
 }
 
 // NewTransactionOutputRaw returns a new ransactionOutputRaw object.
-func NewTransactionOutputRaw(tx *transaction.Transaction, header *block.Header, chain blockchainer.Blockchainer) TransactionOutputRaw {
+func NewTransactionOutputRaw(tx *transaction.Transaction, header *block.Header, appExecResult *state.AppExecResult, chain blockchainer.Blockchainer) TransactionOutputRaw {
 	// confirmations formula
 	confirmations := int(chain.BlockHeight() - header.Base.Index + 1)
 	return TransactionOutputRaw{
@@ -34,6 +36,7 @@ func NewTransactionOutputRaw(tx *transaction.Transaction, header *block.Header,
 			Blockhash:     header.Hash(),
 			Confirmations: confirmations,
 			Timestamp:     header.Timestamp,
+			VMState:       appExecResult.VMState.String(),
 		},
 	}
 }
@@ -44,6 +47,7 @@ func (t TransactionOutputRaw) MarshalJSON() ([]byte, error) {
 		Blockhash:     t.Blockhash,
 		Confirmations: t.Confirmations,
 		Timestamp:     t.Timestamp,
+		VMState:       t.VMState,
 	})
 	if err != nil {
 		return nil, err
@@ -75,6 +79,7 @@ func (t *TransactionOutputRaw) UnmarshalJSON(data []byte) error {
 	t.Blockhash = output.Blockhash
 	t.Confirmations = output.Confirmations
 	t.Timestamp = output.Timestamp
+	t.VMState = output.VMState
 
 	return json.Unmarshal(data, &t.Transaction)
 }

pkg/rpc/server/server.go

@@ -463,13 +463,20 @@ func (s *Server) getPeers(_ request.Params) (interface{}, *response.Error) {
 	return peers, nil
 }
 
-func (s *Server) getRawMempool(_ request.Params) (interface{}, *response.Error) {
+func (s *Server) getRawMempool(reqParams request.Params) (interface{}, *response.Error) {
+	verbose := reqParams.Value(0).GetBoolean()
 	mp := s.chain.GetMemPool()
 	hashList := make([]util.Uint256, 0)
 	for _, item := range mp.GetVerifiedTransactions() {
 		hashList = append(hashList, item.Hash())
 	}
+	if !verbose {
 		return hashList, nil
+	}
+	return result.RawMempool{
+		Height:   s.chain.BlockHeight(),
+		Verified: hashList,
+	}, nil
 }
 
 func (s *Server) validateAddress(reqParams request.Params) (interface{}, *response.Error) {
@@ -685,10 +692,13 @@ func (s *Server) getrawtransaction(reqParams request.Params) (interface{}, *resp
 		_header := s.chain.GetHeaderHash(int(height))
 		header, err := s.chain.GetHeader(_header)
 		if err != nil {
-			resultsErr = response.NewInvalidParamsError(err.Error(), err)
+			return nil, response.NewInvalidParamsError(err.Error(), err)
-		} else {
-			results = result.NewTransactionOutputRaw(tx, header, s.chain)
 		}
+		st, err := s.chain.GetAppExecResult(txHash)
+		if err != nil {
+			return nil, response.NewRPCError("Unknown transaction", err.Error(), err)
+		}
+		results = result.NewTransactionOutputRaw(tx, header, st, s.chain)
 	} else {
 		results = hex.EncodeToString(tx.Bytes())
 	}
@@ -873,7 +883,7 @@ func (s *Server) runScriptInVM(script []byte, tx *transaction.Transaction) *resu
 	vm.LoadScriptWithFlags(script, smartcontract.All)
 	_ = vm.Run()
 	result := &result.Invoke{
-		State:       vm.State(),
+		State:       vm.State().String(),
 		GasConsumed: vm.GasConsumed(),
 		Script:      hex.EncodeToString(script),
 		Stack:       vm.Estack().ToContractParameters(),

pkg/vm/json_test.go

@@ -162,14 +162,14 @@ func testFile(t *testing.T, filename string) {
 			t.Run(ut.Tests[i].Name, func(t *testing.T) {
 				prog := []byte(test.Script)
 				vm := load(prog)
-				vm.state = breakState
+				vm.state = BreakState
 				vm.RegisterInteropGetter(getTestingInterop)
 
 				for i := range test.Steps {
 					execStep(t, vm, test.Steps[i])
 					result := test.Steps[i].Result
 					require.Equal(t, result.State, vm.state)
-					if result.State == faultState { // do not compare stacks on fault
+					if result.State == FaultState { // do not compare stacks on fault
 						continue
 					}
 

pkg/vm/state.go

@@ -11,10 +11,14 @@ type State uint8
 
 // Available States.
 const (
-	noneState State = 0
+	// NoneState represents NONE VM state.
-	haltState State = 1 << iota
+	NoneState State = 0
-	faultState
+	// HaltState represents HALT VM state.
-	breakState
+	HaltState State = 1 << iota
+	// FaultState represents FAULT VM state.
+	FaultState
+	// BreakState represents BREAK VM state.
+	BreakState
 )
 
 // HasFlag checks for State flag presence.
@@ -24,18 +28,18 @@ func (s State) HasFlag(f State) bool {
 
 // String implements the stringer interface.
 func (s State) String() string {
-	if s == noneState {
+	if s == NoneState {
 		return "NONE"
 	}
 
 	ss := make([]string, 0, 3)
-	if s.HasFlag(haltState) {
+	if s.HasFlag(HaltState) {
 		ss = append(ss, "HALT")
 	}
-	if s.HasFlag(faultState) {
+	if s.HasFlag(FaultState) {
 		ss = append(ss, "FAULT")
 	}
-	if s.HasFlag(breakState) {
+	if s.HasFlag(BreakState) {
 		ss = append(ss, "BREAK")
 	}
 	return strings.Join(ss, ", ")
@@ -44,18 +48,18 @@ func (s State) String() string {
 // StateFromString converts string into the VM State.
 func StateFromString(s string) (st State, err error) {
 	if s = strings.TrimSpace(s); s == "NONE" {
-		return noneState, nil
+		return NoneState, nil
 	}
 
 	ss := strings.Split(s, ",")
 	for _, state := range ss {
 		switch state = strings.TrimSpace(state); state {
 		case "HALT":
-			st |= haltState
+			st |= HaltState
 		case "FAULT":
-			st |= faultState
+			st |= FaultState
 		case "BREAK":
-			st |= breakState
+			st |= BreakState
 		default:
 			return 0, errors.New("unknown state")
 		}

pkg/vm/state_test.go

@@ -15,42 +15,42 @@ func TestStateFromString(t *testing.T) {
 
 	s, err = StateFromString("HALT")
 	assert.NoError(t, err)
-	assert.Equal(t, haltState, s)
+	assert.Equal(t, HaltState, s)
 
 	s, err = StateFromString("BREAK")
 	assert.NoError(t, err)
-	assert.Equal(t, breakState, s)
+	assert.Equal(t, BreakState, s)
 
 	s, err = StateFromString("FAULT")
 	assert.NoError(t, err)
-	assert.Equal(t, faultState, s)
+	assert.Equal(t, FaultState, s)
 
 	s, err = StateFromString("NONE")
 	assert.NoError(t, err)
-	assert.Equal(t, noneState, s)
+	assert.Equal(t, NoneState, s)
 
 	s, err = StateFromString("HALT, BREAK")
 	assert.NoError(t, err)
-	assert.Equal(t, haltState|breakState, s)
+	assert.Equal(t, HaltState|BreakState, s)
 
 	s, err = StateFromString("FAULT, BREAK")
 	assert.NoError(t, err)
-	assert.Equal(t, faultState|breakState, s)
+	assert.Equal(t, FaultState|BreakState, s)
 
 	_, err = StateFromString("HALT, KEK")
 	assert.Error(t, err)
 }
 
 func TestState_HasFlag(t *testing.T) {
-	assert.True(t, haltState.HasFlag(haltState))
+	assert.True(t, HaltState.HasFlag(HaltState))
-	assert.True(t, breakState.HasFlag(breakState))
+	assert.True(t, BreakState.HasFlag(BreakState))
-	assert.True(t, faultState.HasFlag(faultState))
+	assert.True(t, FaultState.HasFlag(FaultState))
-	assert.True(t, (haltState | breakState).HasFlag(haltState))
+	assert.True(t, (HaltState | BreakState).HasFlag(HaltState))
-	assert.True(t, (haltState | breakState).HasFlag(breakState))
+	assert.True(t, (HaltState | BreakState).HasFlag(BreakState))
 
-	assert.False(t, haltState.HasFlag(breakState))
+	assert.False(t, HaltState.HasFlag(BreakState))
-	assert.False(t, noneState.HasFlag(haltState))
+	assert.False(t, NoneState.HasFlag(HaltState))
-	assert.False(t, (faultState | breakState).HasFlag(haltState))
+	assert.False(t, (FaultState | BreakState).HasFlag(HaltState))
 }
 
 func TestState_MarshalJSON(t *testing.T) {
@@ -59,11 +59,11 @@ func TestState_MarshalJSON(t *testing.T) {
 		err  error
 	)
 
-	data, err = json.Marshal(haltState | breakState)
+	data, err = json.Marshal(HaltState | BreakState)
 	assert.NoError(t, err)
 	assert.Equal(t, data, []byte(`"HALT, BREAK"`))
 
-	data, err = json.Marshal(faultState)
+	data, err = json.Marshal(FaultState)
 	assert.NoError(t, err)
 	assert.Equal(t, data, []byte(`"FAULT"`))
 }
@@ -76,13 +76,13 @@ func TestState_UnmarshalJSON(t *testing.T) {
 
 	err = json.Unmarshal([]byte(`"HALT, BREAK"`), &s)
 	assert.NoError(t, err)
-	assert.Equal(t, haltState|breakState, s)
+	assert.Equal(t, HaltState|BreakState, s)
 
 	err = json.Unmarshal([]byte(`"FAULT, BREAK"`), &s)
 	assert.NoError(t, err)
-	assert.Equal(t, faultState|breakState, s)
+	assert.Equal(t, FaultState|BreakState, s)
 
 	err = json.Unmarshal([]byte(`"NONE"`), &s)
 	assert.NoError(t, err)
-	assert.Equal(t, noneState, s)
+	assert.Equal(t, NoneState, s)
 }

pkg/vm/vm.go

@@ -93,7 +93,7 @@ func New() *VM {
 func NewWithTrigger(t trigger.Type) *VM {
 	vm := &VM{
 		getInterop: make([]InteropGetterFunc, 0, 3), // 3 functions is typical for our default usage.
-		state:      haltState,
+		state:      HaltState,
 		istack:     NewStack("invocation"),
 		refs:       newRefCounter(),
 		keys:       make(map[string]*keys.PublicKey),
@@ -264,7 +264,7 @@ func (v *VM) Load(prog []byte) {
 	// Clear all stacks and state, it could be a reload.
 	v.istack.Clear()
 	v.estack.Clear()
-	v.state = noneState
+	v.state = NoneState
 	v.gasConsumed = 0
 	v.LoadScript(prog)
 }
@@ -330,9 +330,9 @@ func (v *VM) Stack(n string) string {
 	return string(b)
 }
 
-// State returns string representation of the state for the VM.
+// State returns the state for the VM.
-func (v *VM) State() string {
+func (v *VM) State() State {
-	return v.state.String()
+	return v.state
 }
 
 // Ready returns true if the VM ready to execute the loaded program.
@@ -344,37 +344,37 @@ func (v *VM) Ready() bool {
 // Run starts the execution of the loaded program.
 func (v *VM) Run() error {
 	if !v.Ready() {
-		v.state = faultState
+		v.state = FaultState
 		return errors.New("no program loaded")
 	}
 
-	if v.state.HasFlag(faultState) {
+	if v.state.HasFlag(FaultState) {
 		// VM already ran something and failed, in general its state is
 		// undefined in this case so we can't run anything.
 		return errors.New("VM has failed")
 	}
-	// haltState (the default) or breakState are safe to continue.
+	// HaltState (the default) or BreakState are safe to continue.
-	v.state = noneState
+	v.state = NoneState
 	for {
 		// check for breakpoint before executing the next instruction
 		ctx := v.Context()
 		if ctx != nil && ctx.atBreakPoint() {
-			v.state = breakState
+			v.state = BreakState
 		}
 		switch {
-		case v.state.HasFlag(faultState):
+		case v.state.HasFlag(FaultState):
 			// Should be caught and reported already by the v.Step(),
 			// but we're checking here anyway just in case.
 			return errors.New("VM has failed")
-		case v.state.HasFlag(haltState), v.state.HasFlag(breakState):
+		case v.state.HasFlag(HaltState), v.state.HasFlag(BreakState):
 			// Normal exit from this loop.
 			return nil
-		case v.state == noneState:
+		case v.state == NoneState:
 			if err := v.Step(); err != nil {
 				return err
 			}
 		default:
-			v.state = faultState
+			v.state = FaultState
 			return errors.New("unknown state")
 		}
 	}
@@ -385,7 +385,7 @@ func (v *VM) Step() error {
 	ctx := v.Context()
 	op, param, err := ctx.Next()
 	if err != nil {
-		v.state = faultState
+		v.state = FaultState
 		return newError(ctx.ip, op, err)
 	}
 	return v.execute(ctx, op, param)
@@ -397,7 +397,7 @@ func (v *VM) StepInto() error {
 	ctx := v.Context()
 
 	if ctx == nil {
-		v.state = haltState
+		v.state = HaltState
 	}
 
 	if v.HasStopped() {
@@ -407,7 +407,7 @@ func (v *VM) StepInto() error {
 	if ctx != nil && ctx.prog != nil {
 		op, param, err := ctx.Next()
 		if err != nil {
-			v.state = faultState
+			v.state = FaultState
 			return newError(ctx.ip, op, err)
 		}
 		vErr := v.execute(ctx, op, param)
@@ -418,7 +418,7 @@ func (v *VM) StepInto() error {
 
 	cctx := v.Context()
 	if cctx != nil && cctx.atBreakPoint() {
-		v.state = breakState
+		v.state = BreakState
 	}
 	return nil
 }
@@ -426,14 +426,14 @@ func (v *VM) StepInto() error {
 // StepOut takes the debugger to the line where the current function was called.
 func (v *VM) StepOut() error {
 	var err error
-	if v.state == breakState {
+	if v.state == BreakState {
-		v.state = noneState
+		v.state = NoneState
 	} else {
-		v.state = breakState
+		v.state = BreakState
 	}
 
 	expSize := v.istack.len
-	for v.state == noneState && v.istack.len >= expSize {
+	for v.state == NoneState && v.istack.len >= expSize {
 		err = v.StepInto()
 	}
 	return err
@@ -447,22 +447,22 @@ func (v *VM) StepOver() error {
 		return err
 	}
 
-	if v.state == breakState {
+	if v.state == BreakState {
-		v.state = noneState
+		v.state = NoneState
 	} else {
-		v.state = breakState
+		v.state = BreakState
 	}
 
 	expSize := v.istack.len
 	for {
 		err = v.StepInto()
-		if !(v.state == noneState && v.istack.len > expSize) {
+		if !(v.state == NoneState && v.istack.len > expSize) {
 			break
 		}
 	}
 
-	if v.state == noneState {
+	if v.state == NoneState {
-		v.state = breakState
+		v.state = BreakState
 	}
 
 	return err
@@ -471,22 +471,22 @@ func (v *VM) StepOver() error {
 // HasFailed returns whether VM is in the failed state now. Usually used to
 // check status after Run.
 func (v *VM) HasFailed() bool {
-	return v.state.HasFlag(faultState)
+	return v.state.HasFlag(FaultState)
 }
 
 // HasStopped returns whether VM is in Halt or Failed state.
 func (v *VM) HasStopped() bool {
-	return v.state.HasFlag(haltState) || v.state.HasFlag(faultState)
+	return v.state.HasFlag(HaltState) || v.state.HasFlag(FaultState)
 }
 
 // HasHalted returns whether VM is in Halt state.
 func (v *VM) HasHalted() bool {
-	return v.state.HasFlag(haltState)
+	return v.state.HasFlag(HaltState)
 }
 
 // AtBreakpoint returns whether VM is at breakpoint.
 func (v *VM) AtBreakpoint() bool {
-	return v.state.HasFlag(breakState)
+	return v.state.HasFlag(BreakState)
 }
 
 // GetInteropID converts instruction parameter to an interop ID.
@@ -512,10 +512,10 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
 	// each panic at a central point, putting the VM in a fault state and setting error.
 	defer func() {
 		if errRecover := recover(); errRecover != nil {
-			v.state = faultState
+			v.state = FaultState
 			err = newError(ctx.ip, op, errRecover)
 		} else if v.refs.size > MaxStackSize {
-			v.state = faultState
+			v.state = FaultState
 			err = newError(ctx.ip, op, "stack is too big")
 		}
 	}()
@@ -1268,7 +1268,7 @@ func (v *VM) execute(ctx *Context, op opcode.Opcode, parameter []byte) (err erro
 
 		v.unloadContext(oldCtx)
 		if v.istack.Len() == 0 {
-			v.state = haltState
+			v.state = HaltState
 			break
 		}