diff --git a/pkg/consensus/payload.go b/pkg/consensus/payload.go
index 631440659..0546f5422 100644
--- a/pkg/consensus/payload.go
+++ b/pkg/consensus/payload.go
@@ -176,7 +176,7 @@ func (p *Payload) EncodeBinaryUnsigned(w *io.BinWriter) {
 func (p *Payload) EncodeBinary(w *io.BinWriter) {
 	p.EncodeBinaryUnsigned(w)
 
-	w.WriteByte(1)
+	w.WriteB(1)
 	p.Witness.EncodeBinary(w)
 }
 
@@ -242,7 +242,7 @@ func (p *Payload) DecodeBinary(r *io.BinReader) {
 		return
 	}
 
-	var b = r.ReadByte()
+	var b = r.ReadB()
 	if b != 1 {
 		r.Err = errors.New("invalid format")
 		return
@@ -254,14 +254,14 @@ func (p *Payload) DecodeBinary(r *io.BinReader) {
 // EncodeBinary implements io.Serializable interface.
 func (m *message) EncodeBinary(w *io.BinWriter) {
 	w.WriteBytes([]byte{byte(m.Type)})
-	w.WriteByte(m.ViewNumber)
+	w.WriteB(m.ViewNumber)
 	m.payload.EncodeBinary(w)
 }
 
 // DecodeBinary implements io.Serializable interface.
 func (m *message) DecodeBinary(r *io.BinReader) {
-	m.Type = messageType(r.ReadByte())
-	m.ViewNumber = r.ReadByte()
+	m.Type = messageType(r.ReadB())
+	m.ViewNumber = r.ReadB()
 
 	switch m.Type {
 	case changeViewType:
diff --git a/pkg/consensus/recovery_message.go b/pkg/consensus/recovery_message.go
index 5b17275d0..bd52a9bfb 100644
--- a/pkg/consensus/recovery_message.go
+++ b/pkg/consensus/recovery_message.go
@@ -90,7 +90,7 @@ func (m *recoveryMessage) EncodeBinary(w *io.BinWriter) {
 // DecodeBinary implements io.Serializable interface.
 func (p *changeViewCompact) DecodeBinary(r *io.BinReader) {
 	p.ValidatorIndex = r.ReadU16LE()
-	p.OriginalViewNumber = r.ReadByte()
+	p.OriginalViewNumber = r.ReadB()
 	p.Timestamp = r.ReadU32LE()
 	p.InvocationScript = r.ReadVarBytes()
 }
@@ -98,14 +98,14 @@ func (p *changeViewCompact) DecodeBinary(r *io.BinReader) {
 // EncodeBinary implements io.Serializable interface.
 func (p *changeViewCompact) EncodeBinary(w *io.BinWriter) {
 	w.WriteU16LE(p.ValidatorIndex)
-	w.WriteByte(p.OriginalViewNumber)
+	w.WriteB(p.OriginalViewNumber)
 	w.WriteU32LE(p.Timestamp)
 	w.WriteVarBytes(p.InvocationScript)
 }
 
 // DecodeBinary implements io.Serializable interface.
 func (p *commitCompact) DecodeBinary(r *io.BinReader) {
-	p.ViewNumber = r.ReadByte()
+	p.ViewNumber = r.ReadB()
 	p.ValidatorIndex = r.ReadU16LE()
 	r.ReadBytes(p.Signature[:])
 	p.InvocationScript = r.ReadVarBytes()
@@ -113,7 +113,7 @@ func (p *commitCompact) DecodeBinary(r *io.BinReader) {
 
 // EncodeBinary implements io.Serializable interface.
 func (p *commitCompact) EncodeBinary(w *io.BinWriter) {
-	w.WriteByte(p.ViewNumber)
+	w.WriteB(p.ViewNumber)
 	w.WriteU16LE(p.ValidatorIndex)
 	w.WriteBytes(p.Signature[:])
 	w.WriteVarBytes(p.InvocationScript)
diff --git a/pkg/core/block.go b/pkg/core/block.go
index 4b34ae1a6..1561a3fa5 100644
--- a/pkg/core/block.go
+++ b/pkg/core/block.go
@@ -88,7 +88,7 @@ func NewBlockFromTrimmedBytes(b []byte) (*Block, error) {
 	br := io.NewBinReaderFromBuf(b)
 	block.decodeHashableFields(br)
 
-	_ = br.ReadByte()
+	_ = br.ReadB()
 
 	block.Script.DecodeBinary(br)
 
@@ -109,7 +109,7 @@ func NewBlockFromTrimmedBytes(b []byte) (*Block, error) {
 func (b *Block) Trim() ([]byte, error) {
 	buf := io.NewBufBinWriter()
 	b.encodeHashableFields(buf.BinWriter)
-	buf.WriteByte(1)
+	buf.WriteB(1)
 	b.Script.EncodeBinary(buf.BinWriter)
 
 	buf.WriteVarUint(uint64(len(b.Transactions)))
diff --git a/pkg/core/state/account.go b/pkg/core/state/account.go
index a6462e474..d1a016d6c 100644
--- a/pkg/core/state/account.go
+++ b/pkg/core/state/account.go
@@ -39,7 +39,7 @@ func NewAccount(scriptHash util.Uint160) *Account {
 
 // DecodeBinary decodes Account from the given BinReader.
 func (s *Account) DecodeBinary(br *io.BinReader) {
-	s.Version = uint8(br.ReadByte())
+	s.Version = uint8(br.ReadB())
 	br.ReadBytes(s.ScriptHash[:])
 	s.IsFrozen = br.ReadBool()
 	br.ReadArray(&s.Votes)
@@ -57,7 +57,7 @@ func (s *Account) DecodeBinary(br *io.BinReader) {
 
 // EncodeBinary encodes Account to the given BinWriter.
 func (s *Account) EncodeBinary(bw *io.BinWriter) {
-	bw.WriteByte(byte(s.Version))
+	bw.WriteB(byte(s.Version))
 	bw.WriteBytes(s.ScriptHash[:])
 	bw.WriteBool(s.IsFrozen)
 	bw.WriteArray(s.Votes)
diff --git a/pkg/core/state/asset.go b/pkg/core/state/asset.go
index bbca1eca2..6ecfd6dd5 100644
--- a/pkg/core/state/asset.go
+++ b/pkg/core/state/asset.go
@@ -29,14 +29,14 @@ type Asset struct {
 // DecodeBinary implements Serializable interface.
 func (a *Asset) DecodeBinary(br *io.BinReader) {
 	br.ReadBytes(a.ID[:])
-	a.AssetType = transaction.AssetType(br.ReadByte())
+	a.AssetType = transaction.AssetType(br.ReadB())
 
 	a.Name = br.ReadString()
 
 	a.Amount.DecodeBinary(br)
 	a.Available.DecodeBinary(br)
-	a.Precision = uint8(br.ReadByte())
-	a.FeeMode = uint8(br.ReadByte())
+	a.Precision = uint8(br.ReadB())
+	a.FeeMode = uint8(br.ReadB())
 	br.ReadBytes(a.FeeAddress[:])
 
 	a.Owner.DecodeBinary(br)
@@ -49,12 +49,12 @@ func (a *Asset) DecodeBinary(br *io.BinReader) {
 // EncodeBinary implements Serializable interface.
 func (a *Asset) EncodeBinary(bw *io.BinWriter) {
 	bw.WriteBytes(a.ID[:])
-	bw.WriteByte(byte(a.AssetType))
+	bw.WriteB(byte(a.AssetType))
 	bw.WriteString(a.Name)
 	a.Amount.EncodeBinary(bw)
 	a.Available.EncodeBinary(bw)
-	bw.WriteByte(byte(a.Precision))
-	bw.WriteByte(byte(a.FeeMode))
+	bw.WriteB(byte(a.Precision))
+	bw.WriteB(byte(a.FeeMode))
 	bw.WriteBytes(a.FeeAddress[:])
 
 	a.Owner.EncodeBinary(bw)
diff --git a/pkg/core/state/contract.go b/pkg/core/state/contract.go
index 0c83aff20..6370b2f09 100644
--- a/pkg/core/state/contract.go
+++ b/pkg/core/state/contract.go
@@ -26,8 +26,8 @@ type Contract struct {
 func (cs *Contract) DecodeBinary(br *io.BinReader) {
 	cs.Script = br.ReadVarBytes()
 	br.ReadArray(&cs.ParamList)
-	cs.ReturnType = smartcontract.ParamType(br.ReadByte())
-	cs.Properties = smartcontract.PropertyState(br.ReadByte())
+	cs.ReturnType = smartcontract.ParamType(br.ReadB())
+	cs.Properties = smartcontract.PropertyState(br.ReadB())
 	cs.Name = br.ReadString()
 	cs.CodeVersion = br.ReadString()
 	cs.Author = br.ReadString()
@@ -40,8 +40,8 @@ func (cs *Contract) DecodeBinary(br *io.BinReader) {
 func (cs *Contract) EncodeBinary(bw *io.BinWriter) {
 	bw.WriteVarBytes(cs.Script)
 	bw.WriteArray(cs.ParamList)
-	bw.WriteByte(byte(cs.ReturnType))
-	bw.WriteByte(byte(cs.Properties))
+	bw.WriteB(byte(cs.ReturnType))
+	bw.WriteB(byte(cs.Properties))
 	bw.WriteString(cs.Name)
 	bw.WriteString(cs.CodeVersion)
 	bw.WriteString(cs.Author)
diff --git a/pkg/core/state/notification_event.go b/pkg/core/state/notification_event.go
index e5ed52f61..b0ea8973e 100644
--- a/pkg/core/state/notification_event.go
+++ b/pkg/core/state/notification_event.go
@@ -39,7 +39,7 @@ func (ne *NotificationEvent) DecodeBinary(r *io.BinReader) {
 // EncodeBinary implements the Serializable interface.
 func (aer *AppExecResult) EncodeBinary(w *io.BinWriter) {
 	w.WriteBytes(aer.TxHash[:])
-	w.WriteByte(aer.Trigger)
+	w.WriteB(aer.Trigger)
 	w.WriteString(aer.VMState)
 	aer.GasConsumed.EncodeBinary(w)
 	w.WriteString(aer.Stack)
@@ -49,7 +49,7 @@ func (aer *AppExecResult) EncodeBinary(w *io.BinWriter) {
 // DecodeBinary implements the Serializable interface.
 func (aer *AppExecResult) DecodeBinary(r *io.BinReader) {
 	r.ReadBytes(aer.TxHash[:])
-	aer.Trigger = r.ReadByte()
+	aer.Trigger = r.ReadB()
 	aer.VMState = r.ReadString()
 	aer.GasConsumed.DecodeBinary(r)
 	aer.Stack = r.ReadString()
diff --git a/pkg/core/transaction/attribute.go b/pkg/core/transaction/attribute.go
index b2e2fb6e2..c0682bc22 100644
--- a/pkg/core/transaction/attribute.go
+++ b/pkg/core/transaction/attribute.go
@@ -16,7 +16,7 @@ type Attribute struct {
 
 // DecodeBinary implements Serializable interface.
 func (attr *Attribute) DecodeBinary(br *io.BinReader) {
-	attr.Usage = AttrUsage(br.ReadByte())
+	attr.Usage = AttrUsage(br.ReadB())
 
 	// very special case
 	if attr.Usage == ECDH02 || attr.Usage == ECDH03 {
@@ -35,7 +35,7 @@ func (attr *Attribute) DecodeBinary(br *io.BinReader) {
 		datasize = 20
 	case DescriptionURL:
 		// It's not VarUint as per C# implementation, dunno why
-		var urllen = br.ReadByte()
+		var urllen = br.ReadB()
 		datasize = uint64(urllen)
 	case Description, Remark, Remark1, Remark2, Remark3, Remark4,
 		Remark5, Remark6, Remark7, Remark8, Remark9, Remark10, Remark11,
@@ -51,7 +51,7 @@ func (attr *Attribute) DecodeBinary(br *io.BinReader) {
 
 // EncodeBinary implements Serializable interface.
 func (attr *Attribute) EncodeBinary(bw *io.BinWriter) {
-	bw.WriteByte(byte(attr.Usage))
+	bw.WriteB(byte(attr.Usage))
 	switch attr.Usage {
 	case ECDH02, ECDH03:
 		bw.WriteBytes(attr.Data[1:])
@@ -60,7 +60,7 @@ func (attr *Attribute) EncodeBinary(bw *io.BinWriter) {
 		Remark12, Remark13, Remark14, Remark15:
 		bw.WriteVarBytes(attr.Data)
 	case DescriptionURL:
-		bw.WriteByte(byte(len(attr.Data)))
+		bw.WriteB(byte(len(attr.Data)))
 		fallthrough
 	case Script, ContractHash, Vote, Hash1, Hash2, Hash3, Hash4, Hash5, Hash6,
 		Hash7, Hash8, Hash9, Hash10, Hash11, Hash12, Hash13, Hash14, Hash15:
diff --git a/pkg/core/transaction/publish.go b/pkg/core/transaction/publish.go
index fc592b86b..8e44848e0 100644
--- a/pkg/core/transaction/publish.go
+++ b/pkg/core/transaction/publish.go
@@ -27,10 +27,10 @@ func (tx *PublishTX) DecodeBinary(br *io.BinReader) {
 	lenParams := br.ReadVarUint()
 	tx.ParamList = make([]smartcontract.ParamType, lenParams)
 	for i := 0; i < int(lenParams); i++ {
-		tx.ParamList[i] = smartcontract.ParamType(br.ReadByte())
+		tx.ParamList[i] = smartcontract.ParamType(br.ReadB())
 	}
 
-	tx.ReturnType = smartcontract.ParamType(br.ReadByte())
+	tx.ReturnType = smartcontract.ParamType(br.ReadB())
 
 	if tx.Version >= 1 {
 		tx.NeedStorage = br.ReadBool()
@@ -50,9 +50,9 @@ func (tx *PublishTX) EncodeBinary(bw *io.BinWriter) {
 	bw.WriteVarBytes(tx.Script)
 	bw.WriteVarUint(uint64(len(tx.ParamList)))
 	for _, param := range tx.ParamList {
-		bw.WriteByte(byte(param))
+		bw.WriteB(byte(param))
 	}
-	bw.WriteByte(byte(tx.ReturnType))
+	bw.WriteB(byte(tx.ReturnType))
 	if tx.Version >= 1 {
 		bw.WriteBool(tx.NeedStorage)
 	}
diff --git a/pkg/core/transaction/register.go b/pkg/core/transaction/register.go
index eaa4bc7fd..2c7005bb8 100644
--- a/pkg/core/transaction/register.go
+++ b/pkg/core/transaction/register.go
@@ -30,12 +30,12 @@ type RegisterTX struct {
 
 // DecodeBinary implements Serializable interface.
 func (tx *RegisterTX) DecodeBinary(br *io.BinReader) {
-	tx.AssetType = AssetType(br.ReadByte())
+	tx.AssetType = AssetType(br.ReadB())
 
 	tx.Name = br.ReadString()
 
 	tx.Amount.DecodeBinary(br)
-	tx.Precision = uint8(br.ReadByte())
+	tx.Precision = uint8(br.ReadB())
 
 	tx.Owner.DecodeBinary(br)
 
@@ -44,10 +44,10 @@ func (tx *RegisterTX) DecodeBinary(br *io.BinReader) {
 
 // EncodeBinary implements Serializable interface.
 func (tx *RegisterTX) EncodeBinary(bw *io.BinWriter) {
-	bw.WriteByte(byte(tx.AssetType))
+	bw.WriteB(byte(tx.AssetType))
 	bw.WriteString(tx.Name)
 	tx.Amount.EncodeBinary(bw)
-	bw.WriteByte(byte(tx.Precision))
+	bw.WriteB(byte(tx.Precision))
 	bw.WriteBytes(tx.Owner.Bytes())
 	bw.WriteBytes(tx.Admin[:])
 }
diff --git a/pkg/core/transaction/state_descriptor.go b/pkg/core/transaction/state_descriptor.go
index 1f2e5a5d4..a839d17d2 100644
--- a/pkg/core/transaction/state_descriptor.go
+++ b/pkg/core/transaction/state_descriptor.go
@@ -23,7 +23,7 @@ type StateDescriptor struct {
 
 // DecodeBinary implements Serializable interface.
 func (s *StateDescriptor) DecodeBinary(r *io.BinReader) {
-	s.Type = DescStateType(r.ReadByte())
+	s.Type = DescStateType(r.ReadB())
 
 	s.Key = r.ReadVarBytes()
 	s.Value = r.ReadVarBytes()
@@ -32,7 +32,7 @@ func (s *StateDescriptor) DecodeBinary(r *io.BinReader) {
 
 // EncodeBinary implements Serializable interface.
 func (s *StateDescriptor) EncodeBinary(w *io.BinWriter) {
-	w.WriteByte(byte(s.Type))
+	w.WriteB(byte(s.Type))
 	w.WriteVarBytes(s.Key)
 	w.WriteVarBytes(s.Value)
 	w.WriteString(s.Field)
diff --git a/pkg/core/transaction/transaction.go b/pkg/core/transaction/transaction.go
index 42aa6953e..364b98f00 100644
--- a/pkg/core/transaction/transaction.go
+++ b/pkg/core/transaction/transaction.go
@@ -92,8 +92,8 @@ func (t *Transaction) AddInput(in *Input) {
 
 // DecodeBinary implements Serializable interface.
 func (t *Transaction) DecodeBinary(br *io.BinReader) {
-	t.Type = TXType(br.ReadByte())
-	t.Version = uint8(br.ReadByte())
+	t.Type = TXType(br.ReadB())
+	t.Version = uint8(br.ReadB())
 	t.decodeData(br)
 
 	br.ReadArray(&t.Attributes)
@@ -151,8 +151,8 @@ func (t *Transaction) EncodeBinary(bw *io.BinWriter) {
 // encodeHashableFields encodes the fields that are not used for
 // signing the transaction, which are all fields except the scripts.
 func (t *Transaction) encodeHashableFields(bw *io.BinWriter) {
-	bw.WriteByte(byte(t.Type))
-	bw.WriteByte(byte(t.Version))
+	bw.WriteB(byte(t.Type))
+	bw.WriteB(byte(t.Version))
 
 	// Underlying TXer.
 	if t.Data != nil {
diff --git a/pkg/core/unspent_coin_state.go b/pkg/core/unspent_coin_state.go
index c354eefb9..d522a8650 100644
--- a/pkg/core/unspent_coin_state.go
+++ b/pkg/core/unspent_coin_state.go
@@ -25,7 +25,7 @@ func NewUnspentCoinState(n int) *UnspentCoinState {
 func (s *UnspentCoinState) EncodeBinary(bw *io.BinWriter) {
 	bw.WriteVarUint(uint64(len(s.states)))
 	for _, state := range s.states {
-		bw.WriteByte(byte(state))
+		bw.WriteB(byte(state))
 	}
 }
 
@@ -34,6 +34,6 @@ func (s *UnspentCoinState) DecodeBinary(br *io.BinReader) {
 	lenStates := br.ReadVarUint()
 	s.states = make([]state.Coin, lenStates)
 	for i := 0; i < int(lenStates); i++ {
-		s.states[i] = state.Coin(br.ReadByte())
+		s.states[i] = state.Coin(br.ReadB())
 	}
 }
diff --git a/pkg/crypto/keys/publickey.go b/pkg/crypto/keys/publickey.go
index b886abbcf..e166d8031 100644
--- a/pkg/crypto/keys/publickey.go
+++ b/pkg/crypto/keys/publickey.go
@@ -168,7 +168,7 @@ func (p *PublicKey) DecodeBinary(r *io.BinReader) {
 	var x, y *big.Int
 	var err error
 
-	prefix = uint8(r.ReadByte())
+	prefix = uint8(r.ReadB())
 	if r.Err != nil {
 		return
 	}
diff --git a/pkg/io/binaryReader.go b/pkg/io/binaryReader.go
index b2024f7bb..cd49a38b9 100644
--- a/pkg/io/binaryReader.go
+++ b/pkg/io/binaryReader.go
@@ -87,9 +87,9 @@ func (r *BinReader) ReadU16BE() uint16 {
 	return binary.BigEndian.Uint16(r.u16)
 }
 
-// ReadByte reads a byte from the underlying io.Reader. On read failures it
+// ReadB reads a byte from the underlying io.Reader. On read failures it
 // returns zero.
-func (r *BinReader) ReadByte() byte {
+func (r *BinReader) ReadB() byte {
 	r.ReadBytes(r.u8)
 	if r.Err != nil {
 		return 0
@@ -100,7 +100,7 @@ func (r *BinReader) ReadByte() byte {
 // ReadBool reads a boolean value encoded in a zero/non-zero byte from the
 // underlying io.Reader. On read failures it returns false.
 func (r *BinReader) ReadBool() bool {
-	return r.ReadByte() != 0
+	return r.ReadB() != 0
 }
 
 // ReadArray reads array into value which must be
@@ -169,7 +169,7 @@ func (r *BinReader) ReadVarUint() uint64 {
 		return 0
 	}
 
-	var b = r.ReadByte()
+	var b = r.ReadB()
 
 	if b == 0xfd {
 		return uint64(r.ReadU16LE())
diff --git a/pkg/io/binaryWriter.go b/pkg/io/binaryWriter.go
index 071b12119..db48fd26f 100644
--- a/pkg/io/binaryWriter.go
+++ b/pkg/io/binaryWriter.go
@@ -71,8 +71,8 @@ func (w *BinWriter) WriteU16BE(u16 uint16) {
 	w.WriteBytes(w.u16)
 }
 
-// WriteByte writes a byte into the underlying io.Writer.
-func (w *BinWriter) WriteByte(u8 byte) {
+// WriteB writes a byte into the underlying io.Writer.
+func (w *BinWriter) WriteB(u8 byte) {
 	w.u8[0] = u8
 	w.WriteBytes(w.u8)
 }
@@ -84,7 +84,7 @@ func (w *BinWriter) WriteBool(b bool) {
 	if b {
 		i = 1
 	}
-	w.WriteByte(i)
+	w.WriteB(i)
 }
 
 // WriteArray writes a slice or an array arr into w. Note that nil slices and
@@ -123,22 +123,22 @@ func (w *BinWriter) WriteVarUint(val uint64) {
 	}
 
 	if val < 0xfd {
-		w.WriteByte(byte(val))
+		w.WriteB(byte(val))
 		return
 	}
 	if val < 0xFFFF {
-		w.WriteByte(byte(0xfd))
+		w.WriteB(byte(0xfd))
 		w.WriteU16LE(uint16(val))
 		return
 	}
 	if val < 0xFFFFFFFF {
-		w.WriteByte(byte(0xfe))
+		w.WriteB(byte(0xfe))
 		w.WriteU32LE(uint32(val))
 		return
 
 	}
 
-	w.WriteByte(byte(0xff))
+	w.WriteB(byte(0xff))
 	w.WriteU64LE(val)
 }
 
diff --git a/pkg/io/binaryrw_test.go b/pkg/io/binaryrw_test.go
index d7f0f8ec4..cb733cb4f 100644
--- a/pkg/io/binaryrw_test.go
+++ b/pkg/io/binaryrw_test.go
@@ -128,12 +128,12 @@ func TestWriteByte(t *testing.T) {
 		bin     = []byte{0xa5}
 	)
 	bw := NewBufBinWriter()
-	bw.WriteByte(val)
+	bw.WriteB(val)
 	assert.Nil(t, bw.Err)
 	wrotebin := bw.Bytes()
 	assert.Equal(t, wrotebin, bin)
 	br := NewBinReaderFromBuf(bin)
-	readval = br.ReadByte()
+	readval = br.ReadB()
 	assert.Nil(t, br.Err)
 	assert.Equal(t, val, readval)
 }
@@ -165,7 +165,7 @@ func TestReadLEErrors(t *testing.T) {
 	assert.Equal(t, uint32(0), br.ReadU32LE())
 	assert.Equal(t, uint16(0), br.ReadU16LE())
 	assert.Equal(t, uint16(0), br.ReadU16BE())
-	assert.Equal(t, byte(0), br.ReadByte())
+	assert.Equal(t, byte(0), br.ReadB())
 	assert.Equal(t, false, br.ReadBool())
 	assert.NotNil(t, br.Err)
 }
diff --git a/pkg/network/payload/inventory.go b/pkg/network/payload/inventory.go
index 06bc0f87d..b1747719a 100644
--- a/pkg/network/payload/inventory.go
+++ b/pkg/network/payload/inventory.go
@@ -56,12 +56,12 @@ func NewInventory(typ InventoryType, hashes []util.Uint256) *Inventory {
 
 // DecodeBinary implements Serializable interface.
 func (p *Inventory) DecodeBinary(br *io.BinReader) {
-	p.Type = InventoryType(br.ReadByte())
+	p.Type = InventoryType(br.ReadB())
 	br.ReadArray(&p.Hashes)
 }
 
 // EncodeBinary implements Serializable interface.
 func (p *Inventory) EncodeBinary(bw *io.BinWriter) {
-	bw.WriteByte(byte(p.Type))
+	bw.WriteB(byte(p.Type))
 	bw.WriteArray(p.Hashes)
 }
diff --git a/pkg/smartcontract/contract_test.go b/pkg/smartcontract/contract_test.go
index fba6de4fe..756d8ac31 100644
--- a/pkg/smartcontract/contract_test.go
+++ b/pkg/smartcontract/contract_test.go
@@ -22,7 +22,7 @@ func TestCreateMultiSigRedeemScript(t *testing.T) {
 	}
 
 	br := io.NewBinReaderFromBuf(out)
-	assert.Equal(t, opcode.PUSH3, opcode.Opcode(br.ReadByte()))
+	assert.Equal(t, opcode.PUSH3, opcode.Opcode(br.ReadB()))
 
 	for i := 0; i < len(validators); i++ {
 		bb := br.ReadVarBytes()
@@ -32,6 +32,6 @@ func TestCreateMultiSigRedeemScript(t *testing.T) {
 		assert.Equal(t, validators[i].Bytes(), bb)
 	}
 
-	assert.Equal(t, opcode.PUSH3, opcode.Opcode(br.ReadByte()))
-	assert.Equal(t, opcode.CHECKMULTISIG, opcode.Opcode(br.ReadByte()))
+	assert.Equal(t, opcode.PUSH3, opcode.Opcode(br.ReadB()))
+	assert.Equal(t, opcode.CHECKMULTISIG, opcode.Opcode(br.ReadB()))
 }
diff --git a/pkg/smartcontract/param_context.go b/pkg/smartcontract/param_context.go
index 01984b79c..48fc79cb5 100644
--- a/pkg/smartcontract/param_context.go
+++ b/pkg/smartcontract/param_context.go
@@ -80,12 +80,12 @@ func (pt ParamType) MarshalJSON() ([]byte, error) {
 
 // EncodeBinary implements io.Serializable interface.
 func (pt ParamType) EncodeBinary(w *io.BinWriter) {
-	w.WriteByte(byte(pt))
+	w.WriteB(byte(pt))
 }
 
 // DecodeBinary implements io.Serializable interface.
 func (pt *ParamType) DecodeBinary(r *io.BinReader) {
-	*pt = ParamType(r.ReadByte())
+	*pt = ParamType(r.ReadB())
 }
 
 // NewParameter returns a Parameter with proper initialized Value
diff --git a/pkg/vm/context.go b/pkg/vm/context.go
index 18118e61a..bf42b4440 100644
--- a/pkg/vm/context.go
+++ b/pkg/vm/context.go
@@ -50,14 +50,14 @@ func (c *Context) Next() (opcode.Opcode, []byte, error) {
 	}
 	r := io.NewBinReaderFromBuf(c.prog[c.ip:])
 
-	var instrbyte = r.ReadByte()
+	var instrbyte = r.ReadB()
 	instr := opcode.Opcode(instrbyte)
 	c.nextip++
 
 	var numtoread int
 	switch instr {
 	case opcode.PUSHDATA1, opcode.SYSCALL:
-		var n = r.ReadByte()
+		var n = r.ReadB()
 		numtoread = int(n)
 		c.nextip++
 	case opcode.PUSHDATA2:
diff --git a/pkg/vm/serialization.go b/pkg/vm/serialization.go
index a3d47c0a2..e5a928c2d 100644
--- a/pkg/vm/serialization.go
+++ b/pkg/vm/serialization.go
@@ -94,7 +94,7 @@ func deserializeItem(data []byte) (StackItem, error) {
 // as a function because StackItem itself is an interface. Caveat: always check
 // reader's error value before using the returned StackItem.
 func DecodeBinaryStackItem(r *io.BinReader) StackItem {
-	var t = r.ReadByte()
+	var t = r.ReadB()
 	if r.Err != nil {
 		return nil
 	}