interop: reuse state.Native in ContractMD

pkg/core/blockchain.go

@@ -1245,13 +1245,9 @@ func (bc *Blockchain) GetNativeContractScriptHash(name string) (util.Uint160, er
 
 // GetNatives returns list of native contracts.
 func (bc *Blockchain) GetNatives() []state.NativeContract {
-	res := make([]state.NativeContract, len(bc.contracts.Contracts))
+	res := make([]state.NativeContract, 0, len(bc.contracts.Contracts))
-	for i, c := range bc.contracts.Contracts {
+	for _, c := range bc.contracts.Contracts {
-		md := c.Metadata()
+		res = append(res, c.Metadata().NativeContract)
-		res[i].ID = md.ID
-		res[i].Hash = md.Hash
-		res[i].Manifest = md.Manifest
-		res[i].NEF = md.NEF
 	}
 	return res
 }

pkg/core/interop/context.go

@@ -99,11 +99,8 @@ type Contract interface {
 
 // ContractMD represents native contract instance.
 type ContractMD struct {
-	Manifest manifest.Manifest
+	state.NativeContract
 	Name    string
-	ID       int32
-	NEF      nef.File
-	Hash     util.Uint160
 	Methods map[MethodAndArgCount]MethodAndPrice
 }
 
@@ -117,10 +114,11 @@ type MethodAndArgCount struct {
 func NewContractMD(name string, id int32) *ContractMD {
 	c := &ContractMD{
 		Name:    name,
-		ID:      id,
 		Methods: make(map[MethodAndArgCount]MethodAndPrice),
 	}
 
+	c.ID = id
+
 	// NEF is now stored in contract state and affects state dump.
 	// Therefore values are taken from C# node.
 	c.NEF.Header.Compiler = "neo-core-v3.0"

pkg/core/native/management.go

@@ -453,12 +453,7 @@ func (m *Management) OnPersist(ic *interop.Context) error {
 		md := native.Metadata()
 
 		cs := &state.Contract{
-			ContractBase: state.ContractBase{
+			ContractBase: md.ContractBase,
-				ID:       md.ID,
-				Hash:     md.Hash,
-				NEF:      md.NEF,
-				Manifest: md.Manifest,
-			},
 		}
 		err := m.PutContractState(ic.DAO, cs)
 		if err != nil {