add task loop interval param.

config.toml

 debug = false
+task_loop_interval = 30
 aeskey = "/app/keys/aes.key"
 otpkey = "/app/keys/val.otp"
 

config/config.go

@@ -5,11 +5,12 @@ import (
 )
 
 type Config struct {
-	Debug      bool
-	AesKeyPath string                  `toml:"aeskey"`
-	OTPKeyPath string                  `toml:"otpkey"`
-	Chains     map[string]*ChainConfig `toml:"chains"`
-	MySQL      MySQLConfig
+	Debug            bool
+	TaskLoopInterval int                     `toml:"task_loop_interval"`
+	AesKeyPath       string                  `toml:"aeskey"`
+	OTPKeyPath       string                  `toml:"otpkey"`
+	Chains           map[string]*ChainConfig `toml:"chains"`
+	MySQL            MySQLConfig
 }
 
 type ChainConfig struct {

dao/eth.go

@@ -219,7 +219,7 @@ func (d *Dao) HandleTasks() {
 	defer d.wg.Done()
 
 	ticker := time.NewTicker(5 * time.Second)
-	maxCount := 5
+	maxCount := 30
 	offset := 0
 	defer ticker.Stop()
 
@@ -232,6 +232,9 @@ func (d *Dao) HandleTasks() {
 			if d.validatorPk == nil {
 				continue
 			}
+			if d.c.TaskLoopInterval >= 1 {
+				ticker.Reset(time.Duration(d.c.TaskLoopInterval) * time.Second)
+			}
 			// select unprocessed bridge event with maxCount.
 			events, err := d.GetUnprocessedBridgeEvents(maxCount, offset)
 			if err != nil {