core/interop: add base58 encoding/decoding syscalls

Follow neo-project/neo#1833.

pkg/compiler/syscall.go

@@ -11,6 +11,8 @@ type Syscall struct {
 // All lists are sorted, keep 'em this way, please.
 var syscalls = map[string]map[string]Syscall{
 	"binary": {
+		"Base58Decode": {interopnames.SystemBinaryBase58Decode, false},
+		"Base58Encode": {interopnames.SystemBinaryBase58Encode, false},
 		"Base64Decode": {interopnames.SystemBinaryBase64Decode, false},
 		"Base64Encode": {interopnames.SystemBinaryBase64Encode, false},
 		"Deserialize":  {interopnames.SystemBinaryDeserialize, false},

pkg/core/interop/interopnames/names.go

@@ -2,6 +2,8 @@ package interopnames
 
 // Names of all used interops.
 const (
+	SystemBinaryBase58Decode                 = "System.Binary.Base58Decode"
+	SystemBinaryBase58Encode                 = "System.Binary.Base58Encode"
 	SystemBinaryBase64Decode                 = "System.Binary.Base64Decode"
 	SystemBinaryBase64Encode                 = "System.Binary.Base64Encode"
 	SystemBinaryDeserialize                  = "System.Binary.Deserialize"
@@ -67,6 +69,8 @@ const (
 )
 
 var names = []string{
+	SystemBinaryBase58Decode,
+	SystemBinaryBase58Encode,
 	SystemBinaryBase64Decode,
 	SystemBinaryBase64Encode,
 	SystemBinaryDeserialize,

pkg/core/interop_neo.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 	"sort"
 
+	"github.com/mr-tron/base58"
 	"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/crypto/hash"
@@ -195,16 +196,16 @@ func runtimeDeserialize(ic *interop.Context) error {
 	return vm.RuntimeDeserialize(ic.VM)
 }
 
-// runtimeEncode encodes top stack item into a base64 string.
+// runtimeEncodeBase64 encodes top stack item into a base64 string.
-func runtimeEncode(ic *interop.Context) error {
+func runtimeEncodeBase64(ic *interop.Context) error {
 	src := ic.VM.Estack().Pop().Bytes()
 	result := base64.StdEncoding.EncodeToString(src)
 	ic.VM.Estack().PushVal([]byte(result))
 	return nil
 }
 
-// runtimeDecode decodes top stack item from base64 string to byte array.
+// runtimeDecodeBase64 decodes top stack item from base64 string to byte array.
-func runtimeDecode(ic *interop.Context) error {
+func runtimeDecodeBase64(ic *interop.Context) error {
 	src := ic.VM.Estack().Pop().String()
 	result, err := base64.StdEncoding.DecodeString(src)
 	if err != nil {
@@ -213,3 +214,22 @@ func runtimeDecode(ic *interop.Context) error {
 	ic.VM.Estack().PushVal(result)
 	return nil
 }
+
+// runtimeEncodeBase58 encodes top stack item into a base58 string.
+func runtimeEncodeBase58(ic *interop.Context) error {
+	src := ic.VM.Estack().Pop().Bytes()
+	result := base58.Encode(src)
+	ic.VM.Estack().PushVal([]byte(result))
+	return nil
+}
+
+// runtimeDecodeBase58 decodes top stack item from base58 string to byte array.
+func runtimeDecodeBase58(ic *interop.Context) error {
+	src := ic.VM.Estack().Pop().String()
+	result, err := base58.Decode(src)
+	if err != nil {
+		return err
+	}
+	ic.VM.Estack().PushVal(result)
+	return nil
+}

pkg/core/interop_neo_test.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/mr-tron/base58"
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
 	"github.com/nspcc-dev/neo-go/pkg/core/block"
 	"github.com/nspcc-dev/neo-go/pkg/core/dao"
@@ -220,36 +221,45 @@ func TestECDSAVerify(t *testing.T) {
 	})
 }
 
-func TestRuntimeEncode(t *testing.T) {
+func TestRuntimeEncodeDecode(t *testing.T) {
-	str := []byte("my pretty string")
+	original := []byte("my pretty string")
+	encoded64 := base64.StdEncoding.EncodeToString(original)
+	encoded58 := base58.Encode(original)
 	v, ic, bc := createVM(t)
 	defer bc.Close()
 
-	v.Estack().PushVal(str)
+	t.Run("Encode64", func(t *testing.T) {
-	require.NoError(t, runtimeEncode(ic))
+		v.Estack().PushVal(original)
-
+		require.NoError(t, runtimeEncodeBase64(ic))
-	expected := []byte(base64.StdEncoding.EncodeToString(str))
-	actual := v.Estack().Pop().Bytes()
-	require.Equal(t, expected, actual)
-}
-
-func TestRuntimeDecode(t *testing.T) {
-	expected := []byte("my pretty string")
-	str := base64.StdEncoding.EncodeToString(expected)
-	v, ic, bc := createVM(t)
-	defer bc.Close()
-
-	t.Run("positive", func(t *testing.T) {
-		v.Estack().PushVal(str)
-		require.NoError(t, runtimeDecode(ic))
-
 		actual := v.Estack().Pop().Bytes()
-		require.Equal(t, expected, actual)
+		require.Equal(t, []byte(encoded64), actual)
 	})
 
-	t.Run("error", func(t *testing.T) {
+	t.Run("Encode58", func(t *testing.T) {
-		v.Estack().PushVal(str + "%")
+		v.Estack().PushVal(original)
-		require.Error(t, runtimeDecode(ic))
+		require.NoError(t, runtimeEncodeBase58(ic))
+		actual := v.Estack().Pop().Bytes()
+		require.Equal(t, []byte(encoded58), actual)
+	})
+	t.Run("Decode64/positive", func(t *testing.T) {
+		v.Estack().PushVal(encoded64)
+		require.NoError(t, runtimeDecodeBase64(ic))
+		actual := v.Estack().Pop().Bytes()
+		require.Equal(t, original, actual)
+	})
+	t.Run("Decode64/error", func(t *testing.T) {
+		v.Estack().PushVal(encoded64 + "%")
+		require.Error(t, runtimeDecodeBase64(ic))
+	})
+	t.Run("Decode58/positive", func(t *testing.T) {
+		v.Estack().PushVal(encoded58)
+		require.NoError(t, runtimeDecodeBase58(ic))
+		actual := v.Estack().Pop().Bytes()
+		require.Equal(t, original, actual)
+	})
+	t.Run("Decode58/error", func(t *testing.T) {
+		v.Estack().PushVal(encoded58 + "%")
+		require.Error(t, runtimeDecodeBase58(ic))
 	})
 }
 

pkg/core/interops.go

@@ -31,8 +31,10 @@ func SpawnVM(ic *interop.Context) *vm.VM {
 
 // All lists are sorted, keep 'em this way, please.
 var systemInterops = []interop.Function{
-	{Name: interopnames.SystemBinaryBase64Decode, Func: runtimeDecode, Price: 100000, ParamCount: 1},
+	{Name: interopnames.SystemBinaryBase58Decode, Func: runtimeDecodeBase58, Price: 100000, ParamCount: 1},
-	{Name: interopnames.SystemBinaryBase64Encode, Func: runtimeEncode, Price: 100000, ParamCount: 1},
+	{Name: interopnames.SystemBinaryBase58Encode, Func: runtimeEncodeBase58, Price: 100000, ParamCount: 1},
+	{Name: interopnames.SystemBinaryBase64Decode, Func: runtimeDecodeBase64, Price: 100000, ParamCount: 1},
+	{Name: interopnames.SystemBinaryBase64Encode, Func: runtimeEncodeBase64, Price: 100000, ParamCount: 1},
 	{Name: interopnames.SystemBinaryDeserialize, Func: runtimeDeserialize, Price: 500000, ParamCount: 1},
 	{Name: interopnames.SystemBinarySerialize, Func: runtimeSerialize, Price: 100000, ParamCount: 1},
 	{Name: interopnames.SystemBlockchainGetBlock, Func: bcGetBlock, Price: 2500000,

pkg/interop/binary/binary.go

@@ -28,3 +28,15 @@ func Base64Encode(b []byte) []byte {
 func Base64Decode(b []byte) []byte {
 	return nil
 }
+
+// Base58Encode encodes given byte slice into a base58 string and returns byte
+// representation of this string. It uses `System.Binary.Base58Encode` syscall.
+func Base58Encode(b []byte) []byte {
+	return nil
+}
+
+// Base58Decode decodes given base58 string represented as a byte slice into
+// a new byte slice. It uses `System.Binary.Base58Decode` syscall.
+func Base58Decode(b []byte) []byte {
+	return nil
+}