diff --git a/dtmsvr/service.go b/dtmsvr/service.go
index d6c7576..7ba4ddb 100644
--- a/dtmsvr/service.go
+++ b/dtmsvr/service.go
@@ -1,10 +1,6 @@
 package dtmsvr
 
 import (
-	"fmt"
-	"strings"
-	"time"
-
 	"github.com/sirupsen/logrus"
 	"github.com/yedf/dtm/common"
 	"gorm.io/gorm"
@@ -19,33 +15,13 @@ func saveCommitted(m *TransGlobalModel) {
 		writeTransLog(m.Gid, "save committed", m.Status, "", m.Data)
 		dbr := db.Must().Clauses(clause.OnConflict{
 			DoNothing: true,
-		}).Create(&m)
+		}).Create(m)
 		if dbr.RowsAffected == 0 {
 			writeTransLog(m.Gid, "change status", m.Status, "", "")
-			db.Must().Model(&m).Where("status=?", "prepared").Update("status", "committed")
+			db.Must().Model(m).Where("status=?", "prepared").Update("status", "committed")
 		}
-		if m.TransType == "saga" {
-			nsteps := []TransBranchModel{}
-			steps := []M{}
-			common.MustUnmarshalString(m.Data, &steps)
-			for _, step := range steps {
-				nsteps = append(nsteps, TransBranchModel{
-					Gid:        m.Gid,
-					Branch:     fmt.Sprintf("%d", len(nsteps)+1),
-					Data:       step["data"].(string),
-					Url:        step["compensate"].(string),
-					BranchType: "compensate",
-					Status:     "prepared",
-				})
-				nsteps = append(nsteps, TransBranchModel{
-					Gid:        m.Gid,
-					Branch:     fmt.Sprintf("%d", len(nsteps)+1),
-					Data:       step["data"].(string),
-					Url:        step["action"].(string),
-					BranchType: "action",
-					Status:     "prepared",
-				})
-			}
+		nsteps := GetTrans(m).GetDataBranches()
+		if len(nsteps) > 0 {
 			writeTransLog(m.Gid, "save steps", m.Status, "", common.MustMarshalString(nsteps))
 			db.Must().Clauses(clause.OnConflict{
 				DoNothing: true,
@@ -79,162 +55,5 @@ func innerProcessTrans(trans *TransGlobalModel) (rerr error) {
 	branches := []TransBranchModel{}
 	db := dbGet()
 	db.Must().Where("gid=?", trans.Gid).Order("id asc").Find(&branches)
-	if trans.TransType == "saga" {
-		return innerProcessCommittedSaga(trans, db, branches)
-	} else if trans.TransType == "xa" {
-		return innerProcessCommittedXa(trans, db, branches)
-	}
-	panic(fmt.Errorf("unkown trans type: %s", trans.TransType))
-}
-
-func innerProcessCommittedXa(trans *TransGlobalModel, db *common.MyDb, branches []TransBranchModel) error {
-	gid := trans.Gid
-	if trans.Status == "finished" {
-		return nil
-	}
-	if trans.Status == "committed" {
-		for _, branch := range branches {
-			if branch.Status == "finished" {
-				continue
-			}
-			db.Must().Model(&TransGlobalModel{}).Where("gid=?", gid).Update("gid", gid) // 更新update_time，避免被定时任务再次
-			resp, err := common.RestyClient.R().SetBody(M{
-				"branch": branch.Branch,
-				"action": "commit",
-				"gid":    branch.Gid,
-			}).Post(branch.Url)
-			if err != nil {
-				return err
-			}
-			body := resp.String()
-			if !strings.Contains(body, "SUCCESS") {
-				return fmt.Errorf("bad response: %s", body)
-			}
-			writeTransLog(gid, "step finished", "finished", branch.Branch, "")
-			db.Must().Model(&branch).Where("status=?", "prepared").Updates(M{
-				"status":      "finished",
-				"finish_time": time.Now(),
-			})
-		}
-		writeTransLog(gid, "xa finished", "finished", "", "")
-		db.Must().Model(&TransGlobalModel{}).Where("gid=? and status=?", gid, "committed").Updates(M{
-			"status":      "finished",
-			"finish_time": time.Now(),
-		})
-	} else if trans.Status == "prepared" { // 未commit直接处理的情况为回滚场景
-		for _, branch := range branches {
-			if branch.Status == "rollbacked" {
-				continue
-			}
-			db.Must().Model(&TransGlobalModel{}).Where("gid=?", gid).Update("gid", gid) // 更新update_time，避免被定时任务再次
-			resp, err := common.RestyClient.R().SetBody(M{
-				"branch": branch.Branch,
-				"action": "rollback",
-				"gid":    branch.Gid,
-			}).Post(branch.Url)
-			if err != nil {
-				return err
-			}
-			body := resp.String()
-			if !strings.Contains(body, "SUCCESS") {
-				return fmt.Errorf("bad response: %s", body)
-			}
-			writeTransLog(gid, "step rollbacked", "rollbacked", branch.Branch, "")
-			db.Must().Model(&branch).Where("status=?", "prepared").Updates(M{
-				"status":      "rollbacked",
-				"finish_time": time.Now(),
-			})
-		}
-		writeTransLog(gid, "xa rollbacked", "rollbacked", "", "")
-		db.Must().Model(&TransGlobalModel{}).Where("gid=? and status=?", gid, "prepared").Updates(M{
-			"status":      "rollbacked",
-			"finish_time": time.Now(),
-		})
-	} else {
-		return fmt.Errorf("bad trans status: %s", trans.Status)
-	}
-	return nil
-}
-
-func innerProcessCommittedSaga(trans *TransGlobalModel, db *common.MyDb, branches []TransBranchModel) error {
-	gid := trans.Gid
-	current := 0 // 当前正在处理的步骤
-	for ; current < len(branches); current++ {
-		step := branches[current]
-		if step.BranchType == "compensate" && step.Status == "prepared" || step.BranchType == "action" && step.Status == "finished" {
-			continue
-		}
-		if step.BranchType == "action" && step.Status == "prepared" {
-			resp, err := common.RestyClient.R().SetBody(step.Data).SetQueryParam("gid", step.Gid).Post(step.Url)
-			if err != nil {
-				return err
-			}
-			body := resp.String()
-			db.Must().Model(&TransGlobalModel{}).Where("gid=?", gid).Update("gid", gid) // 更新update_time，避免被定时任务再次
-			if strings.Contains(body, "SUCCESS") {
-				writeTransLog(gid, "step finished", "finished", step.Branch, "")
-				dbr := db.Must().Model(&step).Where("status=?", "prepared").Updates(M{
-					"status":      "finished",
-					"finish_time": time.Now(),
-				})
-				checkAffected(dbr)
-			} else if strings.Contains(body, "FAIL") {
-				writeTransLog(gid, "step rollbacked", "rollbacked", step.Branch, "")
-				dbr := db.Must().Model(&step).Where("status=?", "prepared").Updates(M{
-					"status":        "rollbacked",
-					"rollback_time": time.Now(),
-				})
-				checkAffected(dbr)
-				break
-			} else {
-				return fmt.Errorf("unknown response: %s, will be retried", body)
-			}
-		}
-	}
-	if current == len(branches) { // saga 事务完成
-		writeTransLog(gid, "saga finished", "finished", "", "")
-		dbr := db.Must().Model(&TransGlobalModel{}).Where("gid=? and status=?", gid, "committed").Updates(M{
-			"status":      "finished",
-			"finish_time": time.Now(),
-		})
-		checkAffected(dbr)
-		return nil
-	}
-	for current = current - 1; current >= 0; current-- {
-		step := branches[current]
-		if step.BranchType != "compensate" || step.Status != "prepared" {
-			continue
-		}
-		resp, err := common.RestyClient.R().SetBody(step.Data).SetQueryParam("gid", step.Gid).Post(step.Url)
-		if err != nil {
-			return err
-		}
-		body := resp.String()
-		if strings.Contains(body, "SUCCESS") {
-			writeTransLog(gid, "step rollbacked", "rollbacked", step.Branch, "")
-			dbr := db.Must().Model(&step).Where("status=?", step.Status).Updates(M{
-				"status":        "rollbacked",
-				"rollback_time": time.Now(),
-			})
-			checkAffected(dbr)
-		} else {
-			return fmt.Errorf("expect compensate return SUCCESS")
-		}
-	}
-	if current != -1 {
-		return fmt.Errorf("saga current not -1")
-	}
-	writeTransLog(gid, "saga rollbacked", "rollbacked", "", "")
-	dbr := db.Must().Model(&TransGlobalModel{}).Where("status=? and gid=?", "committed", gid).Updates(M{
-		"status":        "rollbacked",
-		"rollback_time": time.Now(),
-	})
-	checkAffected(dbr)
-	return nil
-}
-
-func checkAffected(db1 *gorm.DB) {
-	if db1.RowsAffected == 0 {
-		panic(fmt.Errorf("duplicate updating"))
-	}
+	return GetTrans(trans).ProcessOnce(db, branches)
 }
diff --git a/dtmsvr/types.go b/dtmsvr/types.go
index 7dbf9ad..606a886 100644
--- a/dtmsvr/types.go
+++ b/dtmsvr/types.go
@@ -1,9 +1,11 @@
 package dtmsvr
 
 import (
+	"fmt"
 	"time"
 
 	"github.com/yedf/dtm/common"
+	"gorm.io/gorm"
 )
 
 type M = map[string]interface{}
@@ -24,6 +26,11 @@ func (*TransGlobalModel) TableName() string {
 	return "trans_global"
 }
 
+func (t *TransGlobalModel) touch(db *common.MyDb) *gorm.DB {
+	writeTransLog(t.Gid, "touch trans", "", "", "")
+	return db.Model(&TransGlobalModel{}).Where("gid=?", t.Gid).Update("gid", t.Gid) // 更新update_time，避免被定时任务再次
+}
+
 type TransBranchModel struct {
 	common.ModelBase
 	Gid          string
@@ -39,3 +46,20 @@ type TransBranchModel struct {
 func (*TransBranchModel) TableName() string {
 	return "trans_branch"
 }
+
+func (t *TransBranchModel) saveStatus(db *common.MyDb, status string) *gorm.DB {
+	writeTransLog(t.Gid, "step change", status, t.Branch, "")
+	dbr := db.Must().Model(t).Where("status=?", t.Status).Updates(M{
+		"status":      status,
+		"finish_time": time.Now(),
+	})
+	checkAffected(dbr)
+	t.Status = status
+	return dbr
+}
+
+func checkAffected(db1 *gorm.DB) {
+	if db1.RowsAffected == 0 {
+		panic(fmt.Errorf("duplicate updating"))
+	}
+}