add Nonce attribute of IssueAsset Transaction

core/transaction/TransactionBuilder.go

@@ -6,6 +6,8 @@ import (
 	"DNA/core/contract/program"
 	"DNA/core/transaction/payload"
 	"DNA/crypto"
+	"math/rand"
+	"time"
 )
 
 //initial a new transaction with asset registration payload
@@ -57,7 +59,10 @@ func NewBookKeeperTransaction(pubKey *crypto.PubKey, isAdd bool, cert []byte) (*
 
 func NewIssueAssetTransaction(outputs []*TxOutput) (*Transaction, error) {
 
-	assetRegPayload := &payload.IssueAsset{}
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	assetRegPayload := &payload.IssueAsset{
+		Nonce: r.Uint64(),
+	}
 
 	return &Transaction{
 		TxType:        IssueAsset,

core/transaction/payload/IssueAsset.go

@@ -1,10 +1,14 @@
 package payload
 
-import "io"
+import (
+	"DNA/common/serialization"
+	"io"
+)
 
 const IssueAssetPayloadVersion byte = 0x00
 
 type IssueAsset struct {
+	Nonce uint64
 }
 
 func (a *IssueAsset) Data(version byte) []byte {
@@ -14,9 +18,11 @@ func (a *IssueAsset) Data(version byte) []byte {
 }
 
 func (a *IssueAsset) Serialize(w io.Writer, version byte) error {
-	return nil
+	return serialization.WriteUint64(w, a.Nonce)
 }
 
 func (a *IssueAsset) Deserialize(r io.Reader, version byte) error {
-	return nil
+	var err error
+	a.Nonce, err = serialization.ReadUint64(r)
+	return err
 }

net/httpjsonrpc/TransPayloadToHex.go

@@ -34,6 +34,7 @@ type DeployCodeInfo struct {
 
 //implement PayloadInfo define IssueAssetInfo
 type IssueAssetInfo struct {
+	Nonce uint64
 }
 
 type IssuerInfo struct {
@@ -95,6 +96,9 @@ func TransPayloadToHex(p Payload) PayloadInfo {
 		}
 		return obj
 	case *payload.IssueAsset:
+		obj := new(IssueAssetInfo)
+		obj.Nonce = object.Nonce
+		return obj
 	case *payload.TransferAsset:
 	case *payload.DeployCode:
 		obj := new(DeployCodeInfo)