update API page

src/API.md

@@ -26,3 +26,77 @@ On base of password will be generted keypair for signing and keypair for encodin
 ## Adding friends
 Each user have :w
 
+----
+
+# Requests 
+``` Rust
+pub enum Request {
+    StartApp,
+        StopApp,
+        LoadUsers,
+        #[serde(rename_all = "camelCase")]
+        SendMessage {
+            user_id: Id,
+            message: String,
+        },
+        #[serde(rename_all = "camelCase")]
+        LoadMessages {
+            user_id: Id,
+            count: u32,
+            start_index: u32,
+        },
+        #[serde(rename_all = "camelCase")]
+        AddUser {
+            name: String,
+            sign_key: String,
+            insert_key: String,
+        }, //    CreateInstance TODO v0.3
+}
+```
+## `StartApp`
+Require when when client started.
+``` json
+    {
+     type: "startApp"
+    }
+```
+
+## `StopApp`
+``` json
+    {
+    type: "stopApp"
+    }
+```
+## `LoadUsers`
+``` json
+    {
+    type: "loadUsers"
+    }
+```
+## `SendMessage`
+``` json
+    {
+    type: "sendMessage",
+    userId: "UUID_V4...",
+    message: "hellow world"
+    }
+```
+## `AddUser`
+``` json
+    {
+    type: "addUser",
+    name: "username",
+    signKey: "USK@key...",
+    insertKey: "insertkey..."
+    }
+```
+## `LoadMessages`
+Requesting `count` messages from `userId` started from `startIndex`'s message
+``` json
+    {
+    type: "loadMessages",
+    userId: "UUID_V4...",
+    count: 10,
+    startIndex: 30
+    }
+```