core,vm: adjust binary (de-)serialization syscalls

Related #1027.

1. Move System.Runtime.(De)serialize to System.Binary.*
2. Rename compiler stubs.
3. Adjust opcode prices.

pkg/compiler/syscall.go

@@ -25,8 +25,8 @@ var syscalls = map[string]map[string]string{
 		"Notify":       "System.Runtime.Notify",
 		"Log":          "System.Runtime.Log",
 		"GetTime":      "System.Runtime.GetTime",
-		"Serialize":    "System.Runtime.Serialize",
-		"Deserialize":  "System.Runtime.Deserialize",
+		"Serialize":    "System.Binary.Serialize",
+		"Deserialize":  "System.Binary.Deserialize",
 	},
 	"blockchain": {
 		"GetBlock":                "System.Blockchain.GetBlock",

pkg/core/interops.go

@@ -68,6 +68,8 @@ func getInteropFromSlice(ic *interop.Context, slice []interop.Function) func(uin
 
 // All lists are sorted, keep 'em this way, please.
 var systemInterops = []interop.Function{
+	{Name: "System.Binary.Deserialize", Func: runtimeDeserialize, Price: 500000},
+	{Name: "System.Binary.Serialize", Func: runtimeSerialize, Price: 100000},
 	{Name: "System.Blockchain.GetBlock", Func: bcGetBlock, Price: 250,
 		AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates},
 	{Name: "System.Blockchain.GetContract", Func: bcGetContract, Price: 100,
@@ -104,14 +106,12 @@ var systemInterops = []interop.Function{
 	{Name: "System.Iterator.Keys", Func: iterator.Keys, Price: 1},
 	{Name: "System.Iterator.Values", Func: iterator.Values, Price: 1},
 	{Name: "System.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 200, RequiredFlags: smartcontract.AllowStates},
-	{Name: "System.Runtime.Deserialize", Func: runtimeDeserialize, Price: 1},
 	{Name: "System.Runtime.GetTime", Func: runtimeGetTime, Price: 1,
 		AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowStates},
 	{Name: "System.Runtime.GetTrigger", Func: runtimeGetTrigger, Price: 1},
 	{Name: "System.Runtime.Log", Func: runtimeLog, Price: 1, RequiredFlags: smartcontract.AllowNotify},
 	{Name: "System.Runtime.Notify", Func: runtimeNotify, Price: 1, RequiredFlags: smartcontract.AllowNotify},
 	{Name: "System.Runtime.Platform", Func: runtimePlatform, Price: 1},
-	{Name: "System.Runtime.Serialize", Func: runtimeSerialize, Price: 1},
 	{Name: "System.Storage.Delete", Func: storageDelete, Price: StoragePrice,
 		AllowedTriggers: trigger.Application, RequiredFlags: smartcontract.AllowModifyStates},
 	{Name: "System.Storage.Find", Func: storageFind, Price: 1000000,

pkg/interop/binary/binary.go

@@ -0,0 +1,18 @@
+/*
+Package binary provides binary serialization routines.
+*/
+package binary
+
+// Serialize serializes any given item into a byte slice. It works for all
+// regular VM types (not ones from interop package) and allows to save them in
+// storage or pass into Notify and then Deserialize them on the next run or in
+// the external event receiver. It uses `System.Binary.Serialize` syscall.
+func Serialize(item interface{}) []byte {
+	return nil
+}
+
+// Deserialize unpacks previously serialized value from a byte slice, it's the
+// opposite of Serialize. It uses `System.Binary.Deserialize` syscall.
+func Deserialize(b []byte) interface{} {
+	return nil
+}

pkg/interop/runtime/runtime.go

@@ -54,17 +54,3 @@ func Application() byte {
 func Verification() byte {
 	return 0x00
 }
-
-// Serialize serializes any given item into a byte slice. It works for all
-// regular VM types (not ones from interop package) and allows to save them in
-// storage or pass into Notify and then Deserialize them on the next run or in
-// the external event receiver. It uses `System.Runtime.Serialize` syscall.
-func Serialize(item interface{}) []byte {
-	return nil
-}
-
-// Deserialize unpacks previously serialized value from a byte slice, it's the
-// opposite of Serialize. It uses `System.Runtime.Deserialize` syscall.
-func Deserialize(b []byte) interface{} {
-	return nil
-}

pkg/vm/interop.go

@@ -35,14 +35,14 @@ type interopIDFuncPrice struct {
 type InteropGetterFunc func(uint32) *InteropFuncPrice
 
 var defaultVMInterops = []interopIDFuncPrice{
+	{emit.InteropNameToID([]byte("System.Binary.Deserialize")),
+		InteropFuncPrice{Func: RuntimeDeserialize, Price: 500000}},
+	{emit.InteropNameToID([]byte("System.Binary.Serialize")),
+		InteropFuncPrice{Func: RuntimeSerialize, Price: 100000}},
 	{emit.InteropNameToID([]byte("System.Runtime.Log")),
 		InteropFuncPrice{Func: runtimeLog, Price: 1}},
 	{emit.InteropNameToID([]byte("System.Runtime.Notify")),
 		InteropFuncPrice{Func: runtimeNotify, Price: 1}},
-	{emit.InteropNameToID([]byte("System.Runtime.Serialize")),
-		InteropFuncPrice{Func: RuntimeSerialize, Price: 1}},
-	{emit.InteropNameToID([]byte("System.Runtime.Deserialize")),
-		InteropFuncPrice{Func: RuntimeDeserialize, Price: 1}},
 	{emit.InteropNameToID([]byte("System.Enumerator.Create")),
 		InteropFuncPrice{Func: EnumeratorCreate, Price: 1}},
 	{emit.InteropNameToID([]byte("System.Enumerator.Next")),
@@ -87,7 +87,7 @@ func runtimeNotify(vm *VM) error {
 	return nil
 }
 
-// RuntimeSerialize handles syscalls System.Runtime.Serialize and System.Runtime.Serialize.
+// RuntimeSerialize handles System.Binary.Serialize syscall.
 func RuntimeSerialize(vm *VM) error {
 	item := vm.Estack().Pop()
 	data, err := stackitem.SerializeItem(item.value)
@@ -102,7 +102,7 @@ func RuntimeSerialize(vm *VM) error {
 	return nil
 }
 
-// RuntimeDeserialize handles syscalls System.Runtime.Deserialize and System.Runtime.Deserialize.
+// RuntimeDeserialize handles System.Binary.Deserialize syscall.
 func RuntimeDeserialize(vm *VM) error {
 	data := vm.Estack().Pop().Bytes()
 

pkg/vm/vm_test.go

@@ -656,8 +656,8 @@ func getSyscallProg(name string) (prog []byte) {
 }
 
 func getSerializeProg() (prog []byte) {
-	prog = append(prog, getSyscallProg("System.Runtime.Serialize")...)
-	prog = append(prog, getSyscallProg("System.Runtime.Deserialize")...)
+	prog = append(prog, getSyscallProg("System.Binary.Serialize")...)
+	prog = append(prog, getSyscallProg("System.Binary.Deserialize")...)
 	prog = append(prog, byte(opcode.RET))
 
 	return
@@ -762,7 +762,7 @@ func TestSerializeStruct(t *testing.T) {
 }
 
 func TestDeserializeUnknown(t *testing.T) {
-	prog := append(getSyscallProg("System.Runtime.Deserialize"), byte(opcode.RET))
+	prog := append(getSyscallProg("System.Binary.Deserialize"), byte(opcode.RET))
 
 	data, err := stackitem.SerializeItem(stackitem.NewBigInteger(big.NewInt(123)))
 	require.NoError(t, err)
@@ -798,7 +798,7 @@ func TestSerializeMapCompat(t *testing.T) {
 	emit.Bytes(buf.BinWriter, []byte("key"))
 	emit.Bytes(buf.BinWriter, []byte("value"))
 	emit.Opcode(buf.BinWriter, opcode.SETITEM)
-	emit.Syscall(buf.BinWriter, "System.Runtime.Serialize")
+	emit.Syscall(buf.BinWriter, "System.Binary.Serialize")
 	require.NoError(t, buf.Err)
 
 	vm := load(buf.Bytes())