diff --git a/chain/event.go b/chain/event.go
index 58efe93..1096894 100644
--- a/chain/event.go
+++ b/chain/event.go
@@ -583,7 +583,7 @@ func (c *chainClient) RetrieveEvent_FileBank_CreateBucket(blockhash types.Hash)
 					vf := reflect.ValueOf(v.Value)
 					if vf.Len() > 0 {
 						allValue := fmt.Sprintf("%v", vf.Index(0))
-						if strings.Contains(v.Name, "AccountId32.acc") {
+						if strings.Contains(v.Name, "AccountId32.operator") {
 							temp := strings.Split(allValue, "] ")
 							puk := make([]byte, types.AccountIDLen)
 							for _, v := range temp {
@@ -630,7 +630,7 @@ func (c *chainClient) RetrieveEvent_FileBank_DeleteBucket(blockhash types.Hash)
 					vf := reflect.ValueOf(v.Value)
 					if vf.Len() > 0 {
 						allValue := fmt.Sprintf("%v", vf.Index(0))
-						if strings.Contains(v.Name, "AccountId32.acc") {
+						if strings.Contains(v.Name, "AccountId32.operator") {
 							temp := strings.Split(allValue, "] ")
 							puk := make([]byte, types.AccountIDLen)
 							for _, v := range temp {
diff --git a/example/example.go b/example/example.go
index 4bc0e3f..6b9d6fd 100644
--- a/example/example.go
+++ b/example/example.go
@@ -26,6 +26,9 @@ import (
 var MY_MNEMONIC = "bottom drive obey lake curtain smoke basket hold race lonely fit walk"
 
 var RPC_ADDRS = []string{
+	//devnet
+	"wss://devnet-rpc.cess.cloud/ws/",
+	//testnet
 	"wss://testnet-rpc0.cess.cloud/ws/",
 	"wss://testnet-rpc1.cess.cloud/ws/",
 	"wss://testnet-rpc2.cess.cloud/ws/",