diff --git a/README.md b/README.md
index 287e382..d236b87 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # srpc
 
-Easy to use RPC Framework writting in golang
\ No newline at end of file
+Easy to use RPC Framework written in golang
diff --git a/client.go b/client.go
new file mode 100644
index 0000000..4fad9f6
--- /dev/null
+++ b/client.go
@@ -0,0 +1,7 @@
+package srpc
+
+var REQUEST_HEADER_SIZE = int32(8)
+
+type requestHeader struct {
+	size int64
+}
diff --git a/server.go b/server.go
new file mode 100644
index 0000000..54e59af
--- /dev/null
+++ b/server.go
@@ -0,0 +1,33 @@
+package srpc
+
+import (
+	"sync"
+)
+
+const (
+	AIN    uint8 = 0
+	AOUT   uint8 = 1
+	AINOUT uint8 = 2
+)
+
+const (
+	OK  uint8 = 0
+	ERR uint8 = 1
+)
+
+var RESPONSE_HEADER_SIZE = int32(9)
+
+type responseHeader struct {
+	size   int64
+	status uint8
+}
+
+type Server struct {
+	serviceMap sync.Map
+}
+
+func NewServer() *Server {
+	return &Server{}
+}
+
+var DefaultServer = NewServer()