Break core structs down into obj and leak packages

obj/object.go

@@ -0,0 +1,21 @@
+package obj
+
+import "encoding/json"
+
+//go:generate easyjson -all object.go
+
+func NewObject(inputJSON []byte) (*Object, error) {
+	var obj Object
+	err := json.Unmarshal(inputJSON, &obj)
+
+	return &obj, err
+}
+
+type Object struct {
+	Address string `json:"address"`
+	Type    string `json:"type"`
+}
+
+func (s *Object) Index() string {
+	return s.Address + ":" + s.Type
+}