diff --git a/config.example.json b/config.example.json
index 7078ec0..5e3fd71 100644
--- a/config.example.json
+++ b/config.example.json
@@ -16,19 +16,19 @@
 
 		"listen": [
 			{
-				"host": "0.0.0.0",
+				"host": "127.0.0.1",
 				"port": 1111,
-				"diff": 8000,
+				"diff": 1000,
 				"maxConn": 32768
 			},
 			{
-				"host": "0.0.0.0",
+				"host": "127.0.0.1",
 				"port": 3333,
-				"diff": 16000,
+				"diff": 2000,
 				"maxConn": 32768
 			},
 			{
-				"host": "0.0.0.0",
+				"host": "127.0.0.1",
 				"port": 5555,
 				"diff": 16000,
 				"maxConn": 32768
@@ -38,7 +38,7 @@
 
 	"frontend": {
 		"enabled": true,
-		"listen": "0.0.0.0:8082",
+		"listen": "127.0.0.1:8080",
 		"login": "admin",
 		"password": "",
 		"hideIP": false
@@ -48,9 +48,11 @@
 
 	"upstream": [
 		{
-			"name": "Main",
+			"name": "Test",
 			"host": "127.0.0.1",
-			"port": 18081,
+			"port": 19332,
+			"user": "yourusername",
+			"password": "yourpassword",
 			"timeout": "10s"
 		}
 	],
diff --git a/pool/pool.go b/pool/pool.go
index 80d226b..4c8e6c5 100644
--- a/pool/pool.go
+++ b/pool/pool.go
@@ -32,10 +32,12 @@ type Port struct {
 }
 
 type Upstream struct {
-	Name    string `json:"name"`
-	Host    string `json:"host"`
-	Port    int    `json:"port"`
-	Timeout string `json:"timeout"`
+	Name     string `json:"name"`
+	Host     string `json:"host"`
+	Port     int    `json:"port"`
+	User     string `json:"user"`
+	Password string `json:"password"`
+	Timeout  string `json:"timeout"`
 }
 
 type Frontend struct {
diff --git a/rpc/rpc.go b/rpc/rpc.go
index cbdab21..3e09348 100644
--- a/rpc/rpc.go
+++ b/rpc/rpc.go
@@ -54,7 +54,7 @@ type JSONRpcResp struct {
 }
 
 func NewRPCClient(cfg *pool.Upstream) (*RPCClient, error) {
-	rawUrl := fmt.Sprintf("http://%s:%v/json_rpc", cfg.Host, cfg.Port)
+	rawUrl := fmt.Sprintf("http://%s:%v/", cfg.Host, cfg.Port)
 	url, err := url.Parse(rawUrl)
 	if err != nil {
 		return nil, err
@@ -64,11 +64,13 @@ func NewRPCClient(cfg *pool.Upstream) (*RPCClient, error) {
 	rpcClient.client = &http.Client{
 		Timeout: timeout,
 	}
+	rpcClient.login = cfg.User
+	rpcClient.password = cfg.Password
 	return rpcClient, nil
 }
 
 func (r *RPCClient) GetBlockTemplate(reserveSize int, address string) (*GetBlockTemplateReply, error) {
-	params := map[string]interface{}{"reserve_size": reserveSize, "wallet_address": address}
+	params := []string{}
 	rpcResp, err := r.doPost(r.Url.String(), "getblocktemplate", params)
 	var reply *GetBlockTemplateReply
 	if err != nil {