Add key for SCL SCOPE queries

util/keys/sc.go

@@ -0,0 +1,54 @@
+// Copyright © 2016 Abcum Ltd
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package keys
+
+import (
+	"fmt"
+)
+
+// SC ...
+type SC struct {
+	KV interface{}
+	CF interface{}
+	TK interface{}
+	NS interface{}
+	DB interface{}
+	SC interface{}
+}
+
+// init initialises the key
+func (k *SC) init() *SC {
+	k.CF = "!"
+	k.TK = "s"
+	return k
+}
+
+// Encode encodes the key into binary
+func (k *SC) Encode() []byte {
+	k.init()
+	return encode(k.KV, k.CF, k.TK, k.NS, k.DB, k.SC)
+}
+
+// Decode decodes the key from binary
+func (k *SC) Decode(data []byte) {
+	k.init()
+	decode(data, &k.KV, &k.CF, &k.TK, &k.NS, &k.DB, &k.SC)
+}
+
+// String returns a string representation of the key
+func (k *SC) String() string {
+	k.init()
+	return fmt.Sprintf("/%s/%s/%s/%s/%s/%s", k.KV, k.CF, k.TK, k.NS, k.DB, k.SC)
+}