diff --git a/lib/db.js b/lib/db.js
index a1fe32c..5f3b4a4 100644
--- a/lib/db.js
+++ b/lib/db.js
@@ -1,13 +1,29 @@
 const Tapable = require('tapable')
 
+
+// {'endpoint': [fn, fn]}
 class DB extends Tapable {
-  constructor() {
-    // TODO
-  }
+    constructor(options) {
+        // TODO
+        super();
+        this.options = options || {};
+    }
 
-  request() {
-    // TODO
-  }
+    request (params = {}) {
+        // TODO
+        const options = this.applyPluginsWaterfall('options', this.options);
+        
+        return this.applyPluginsBailResult('endpoint', Object.assign(params, options))
+        .then(res => {
+            if(this.applyPluginsBailResult('judge', res)){
+                return Promise.reject(res);
+            }
+            return Promise.resolve(res);
+        })
+        .catch(err => {
+            return Promise.reject(err);
+        })
+    }
 }
 
 module.exports = DB
\ No newline at end of file