diff --git a/agents/agentreq.go b/agents/agentreq.go
index d669d7f31..327540bfd 100644
--- a/agents/agentreq.go
+++ b/agents/agentreq.go
@@ -36,7 +36,7 @@ func NewAgentRequest(req utils.DataProvider,
 	tntTpl config.RSRParsers,
 	dfltTenant, timezone string,
 	filterS *engine.FilterS,
-	header, trailer utils.DataProvider) (ar *AgentRequest) {
+	extraDP map[string]utils.DataProvider) (ar *AgentRequest) {
 	if cgrRply == nil {
 		cgrRply = &utils.DataNode{Type: utils.NMMapType, Map: make(map[string]*utils.DataNode)}
 	}
@@ -49,6 +49,9 @@ func NewAgentRequest(req utils.DataProvider,
 	if opts == nil {
 		opts = make(utils.MapStorage)
 	}
+	if extraDP == nil {
+		extraDP = make(map[string]utils.DataProvider)
+	}
 	ar = &AgentRequest{
 		Request:    req,
 		Tenant:     dfltTenant,
@@ -59,10 +62,9 @@ func NewAgentRequest(req utils.DataProvider,
 		Reply:      rply,
 		Timezone:   timezone,
 		filterS:    filterS,
-		Header:     header,
-		Trailer:    trailer,
 		Opts:       opts,
 		Cfg:        config.CgrConfig().GetDataProvider(),
+		ExtraDP:    extraDP,
 	}
 	if tnt, err := tntTpl.ParseDataProvider(ar); err == nil && tnt != utils.EmptyString {
 		ar.Tenant = tnt
@@ -82,12 +84,11 @@ type AgentRequest struct {
 	Tenant     string
 	Timezone   string
 	filterS    *engine.FilterS
-	Header     utils.DataProvider
-	Trailer    utils.DataProvider
 	diamreq    *utils.OrderedNavigableMap // used in case of building requests (ie. DisconnectSession)
 	tmp        *utils.DataNode            // used in case you want to store temporary items and access them later
 	Opts       utils.MapStorage
 	Cfg        utils.DataProvider
+	ExtraDP    map[string]utils.DataProvider
 }
 
 // String implements utils.DataProvider
@@ -104,7 +105,11 @@ func (ar *AgentRequest) RemoteHost() net.Addr {
 func (ar *AgentRequest) FieldAsInterface(fldPath []string) (val interface{}, err error) {
 	switch fldPath[0] {
 	default:
-		return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+		dp, has := ar.ExtraDP[fldPath[0]]
+		if !has {
+			return nil, fmt.Errorf("unsupported field prefix: <%s>", fldPath[0])
+		}
+		val, err = dp.FieldAsInterface(fldPath[1:])
 	case utils.MetaReq:
 		val, err = ar.Request.FieldAsInterface(fldPath[1:])
 	case utils.MetaVars:
@@ -117,10 +122,6 @@ func (ar *AgentRequest) FieldAsInterface(fldPath []string) (val interface{}, err
 		val, err = ar.diamreq.FieldAsInterface(fldPath[1:])
 	case utils.MetaRep:
 		val, err = ar.Reply.FieldAsInterface(fldPath[1:])
-	case utils.MetaHdr:
-		val, err = ar.Header.FieldAsInterface(fldPath[1:])
-	case utils.MetaTrl:
-		val, err = ar.Trailer.FieldAsInterface(fldPath[1:])
 	case utils.MetaTmp:
 		val, err = ar.tmp.FieldAsInterface(fldPath[1:])
 	case utils.MetaUCH:
diff --git a/agents/agentreq_test.go b/agents/agentreq_test.go
index b1ef52060..19b142a57 100644
--- a/agents/agentreq_test.go
+++ b/agents/agentreq_test.go
@@ -42,7 +42,7 @@ func TestAgReqSetFields(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.CGRID, PathSlice: []string{utils.CGRID}},
 		utils.Sha1("dsafdsaf", time.Date(2013, 11, 7, 8, 42, 26, 0, time.UTC).String()))
@@ -145,7 +145,7 @@ func TestAgentRequestSetFields(t *testing.T) {
 	ar := NewAgentRequest(utils.MapStorage(req), nil,
 		nil, nil, nil, config.NewRSRParsersMustCompile("", utils.NestingSep),
 		"cgrates.org", "", engine.NewFilterS(cfg, nil, dm),
-		utils.MapStorage(req), utils.MapStorage(req))
+		map[string]utils.DataProvider{utils.MetaHdr: utils.MapStorage(req), utils.MetaTrl: utils.MapStorage(req)})
 	input := []*config.FCTemplate{}
 	if err := ar.SetFields(input); err != nil {
 		t.Error(err)
@@ -491,7 +491,7 @@ func TestAgReqMaxCost(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.CapMaxUsage, PathSlice: []string{utils.CapMaxUsage}}, utils.NewLeafNode("120s"))
 
@@ -538,7 +538,7 @@ func TestAgReqParseFieldDiameter(t *testing.T) {
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "MandatoryFalse",
@@ -591,7 +591,7 @@ func TestAgReqParseFieldRadius(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	tplFlds := []*config.FCTemplate{
 		{Tag: "MandatoryFalse",
 			Path: "MandatoryFalse", Type: utils.MetaComposed,
@@ -634,7 +634,7 @@ Host: api.cgrates.org
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	tplFlds := []*config.FCTemplate{
 		{Tag: "MandatoryFalse",
 			Path: "MandatoryFalse", Type: utils.MetaComposed,
@@ -706,7 +706,7 @@ func TestAgReqParseFieldHttpXml(t *testing.T) {
 
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	tplFlds := []*config.FCTemplate{
 		{Tag: "MandatoryFalse",
 			Path: "MandatoryFalse", Type: utils.MetaComposed,
@@ -734,7 +734,7 @@ func TestAgReqEmptyFilter(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.CGRID, PathSlice: []string{utils.CGRID}},
 		utils.Sha1("dsafdsaf", time.Date(2013, 11, 7, 8, 42, 26, 0, time.UTC).String()))
@@ -776,7 +776,7 @@ func TestAgReqMetaExponent(t *testing.T) {
 	dm := engine.NewDataManager(engine.NewInternalDB(nil, nil, true),
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	agReq.CGRRequest.Set(&utils.FullPath{Path: "Value", PathSlice: []string{"Value"}}, utils.NewLeafNode("2"))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: "Exponent", PathSlice: []string{"Exponent"}}, utils.NewLeafNode("2"))
 
@@ -802,7 +802,7 @@ func TestAgReqFieldAsNone(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -840,7 +840,7 @@ func TestAgReqFieldAsNone2(t *testing.T) {
 	dm := engine.NewDataManager(engine.NewInternalDB(nil, nil, true),
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -880,7 +880,7 @@ func TestAgReqSetField2(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -936,7 +936,7 @@ func TestAgReqFieldAsInterface(t *testing.T) {
 	dm := engine.NewDataManager(engine.NewInternalDB(nil, nil, true),
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest = utils.NewOrderedNavigableMap()
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.Usage, PathSlice: []string{utils.Usage}}, &utils.DataNode{Type: utils.NMSliceType, Slice: []*utils.DataNode{{Type: utils.NMDataType, Value: &utils.DataLeaf{Data: 3 * time.Minute}}}})
@@ -996,7 +996,7 @@ func TestAgReqNewARWithCGRRplyAndRply(t *testing.T) {
 		utils.Error:       utils.NewLeafNode(""),
 	}}
 
-	agReq := NewAgentRequest(nil, nil, cgrRply, rply, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, cgrRply, rply, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Fld1",
@@ -1033,7 +1033,7 @@ func TestAgReqSetCGRReplyWithError(t *testing.T) {
 	rply.Set(&utils.FullPath{
 		Path:      "FirstLevel.SecondLevel.Fld1",
 		PathSlice: []string{"FirstLevel", "SecondLevel", "Fld1"}}, utils.NewLeafNode("Val1"))
-	agReq := NewAgentRequest(nil, nil, nil, rply, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, rply, nil, nil, "cgrates.org", "", filterS, nil)
 
 	agReq.setCGRReply(nil, utils.ErrNotFound)
 
@@ -1081,7 +1081,7 @@ func TestAgReqSetCGRReplyWithoutError(t *testing.T) {
 	}
 
 	agReq := NewAgentRequest(nil, nil, nil, rply, nil,
-		nil, "cgrates.org", "", filterS, nil, nil)
+		nil, "cgrates.org", "", filterS, nil)
 
 	agReq.setCGRReply(myEv, nil)
 
@@ -1128,7 +1128,7 @@ func TestAgReqParseFieldMetaCCUsage(t *testing.T) {
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "CCUsage", Filters: []string{},
@@ -1212,7 +1212,7 @@ func TestAgReqParseFieldMetaUsageDifference(t *testing.T) {
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Usage", Filters: []string{},
@@ -1278,7 +1278,7 @@ func TestAgReqParseFieldMetaSum(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Sum", Filters: []string{},
@@ -1322,7 +1322,7 @@ func TestAgReqParseFieldMetaDifference(t *testing.T) {
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Diff", Filters: []string{},
@@ -1366,7 +1366,7 @@ func TestAgReqParseFieldMetaMultiply(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Multiply", Filters: []string{},
@@ -1410,7 +1410,7 @@ func TestAgReqParseFieldMetaDivide(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Divide", Filters: []string{},
@@ -1454,7 +1454,7 @@ func TestAgReqParseFieldMetaValueExponent(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "ValExp", Filters: []string{},
@@ -1507,7 +1507,7 @@ func TestAgReqOverwrite(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -1559,7 +1559,7 @@ func TestAgReqGroupType(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -1603,7 +1603,7 @@ func TestAgReqSetFieldsInTmp(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
 
 	tplFlds := []*config.FCTemplate{
@@ -1635,7 +1635,7 @@ func TestAgReqSetFieldsIp2Hex(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	agReq.CGRRequest.Set(&utils.FullPath{Path: "IP", PathSlice: []string{"IP"}}, utils.NewLeafNode("62.87.114.244"))
 
 	tplFlds := []*config.FCTemplate{
@@ -1662,7 +1662,7 @@ func TestAgReqSetFieldsString2Hex(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	agReq.CGRRequest.Set(&utils.FullPath{Path: "CustomField", PathSlice: []string{"CustomField"}}, utils.NewLeafNode(string([]byte{0x94, 0x71, 0x02, 0x31, 0x01, 0x59})))
 
 	tplFlds := []*config.FCTemplate{
@@ -1689,7 +1689,7 @@ func TestAgReqSetFieldsWithRemove(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.CGRID, PathSlice: []string{utils.CGRID}},
 		utils.Sha1("dsafdsaf", time.Date(2013, 11, 7, 8, 42, 26, 0, time.UTC).String()))
@@ -1818,7 +1818,7 @@ func TestAgReqSetFieldsInCache(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	engine.NewCacheS(cfg, dm, nil)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
 
 	tplFlds := []*config.FCTemplate{
@@ -1861,7 +1861,7 @@ func TestAgReqSetFieldsInCacheWithTimeOut(t *testing.T) {
 
 	cfg.CacheCfg().Partitions[utils.CacheUCH].TTL = time.Second
 	engine.Cache = engine.NewCacheS(cfg, dm, nil)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
 
 	tplFlds := []*config.FCTemplate{
@@ -1954,7 +1954,7 @@ func TestAgReqFiltersInsideField(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 	//pass the data provider to agent request
-	agReq := NewAgentRequest(newDADataProvider(nil, m), nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(newDADataProvider(nil, m), nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "Usage",
@@ -1984,7 +1984,7 @@ func TestAgReqDynamicPath(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -2052,7 +2052,7 @@ func TestAgReqRoundingDecimals(t *testing.T) {
 	data := engine.NewInternalDB(nil, nil, true)
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 	// populate request, emulating the way will be done in HTTPAgent
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 	agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -2128,7 +2128,7 @@ func BenchmarkAgReqSetField(b *testing.B) {
 
 	b.ResetTimer()
 	for i := 0; i < b.N; i++ {
-		agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+		agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 		// populate request, emulating the way will be done in HTTPAgent
 		agReq.CGRRequest.Set(&utils.FullPath{Path: utils.ToR, PathSlice: []string{utils.ToR}}, utils.NewLeafNode(utils.MetaVoice))
 		agReq.CGRRequest.Set(&utils.FullPath{Path: utils.AccountField, PathSlice: []string{utils.AccountField}}, utils.NewLeafNode("1001"))
@@ -2169,7 +2169,7 @@ func TestAgReqSetFieldsFromCfg(t *testing.T) {
 	dm := engine.NewDataManager(data, config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
 
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	tplFlds := []*config.FCTemplate{
 		{Tag: "CfgField",
@@ -2223,7 +2223,7 @@ func TestFieldAsInterface(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeDaily(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*daily", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{
 		Type:     utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*daily", utils.InfieldSep),
@@ -2252,7 +2252,7 @@ func TestAgentRequestParseFieldDateTimeDaily(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeTimeZone(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*daily", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*daily", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2280,7 +2280,7 @@ func TestAgentRequestParseFieldDateTimeTimeZone(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeMonthly(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*monthly", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*monthly", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2308,7 +2308,7 @@ func TestAgentRequestParseFieldDateTimeMonthly(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeMonthlyEstimated(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*monthly_estimated", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*monthly_estimated", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2336,7 +2336,7 @@ func TestAgentRequestParseFieldDateTimeMonthlyEstimated(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeYearly(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*yearly", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*yearly", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2364,7 +2364,7 @@ func TestAgentRequestParseFieldDateTimeYearly(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeMetaUnlimited(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile(utils.MetaUnlimited, utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile(utils.MetaUnlimited, utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2392,7 +2392,7 @@ func TestAgentRequestParseFieldDateTimeMetaUnlimited(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeEmpty(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2420,7 +2420,7 @@ func TestAgentRequestParseFieldDateTimeEmpty(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeMonthEnd(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*month_endTest", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*month_endTest", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2448,7 +2448,7 @@ func TestAgentRequestParseFieldDateTimeMonthEnd(t *testing.T) {
 
 func TestAgentRequestParseFieldDateTimeError(t *testing.T) {
 	tntTpl := config.NewRSRParsersMustCompile("*month_endTest", utils.InfieldSep)
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, tntTpl, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    config.NewRSRParsersMustCompile("*month_endTest", utils.InfieldSep),
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
@@ -2467,7 +2467,7 @@ func TestAgentRequestParseFieldDateTimeError2(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, prsr, "", "", nil, nil, nil)
+	AgentReq := NewAgentRequest(utils.MapStorage{}, nil, nil, nil, nil, prsr, "", "", nil, nil)
 	fctTemp := &config.FCTemplate{Type: utils.MetaDateTime,
 		Value:    prsr,
 		Layout:   "“Mon Jan _2 15:04:05 2006”",
diff --git a/agents/diamagent.go b/agents/diamagent.go
index ca2c91536..203547717 100644
--- a/agents/diamagent.go
+++ b/agents/diamagent.go
@@ -274,7 +274,7 @@ func (da *DiameterAgent) handleMessage(c diam.Conn, m *diam.Message) {
 				reqProcessor.Tenant, da.cgrCfg.GeneralCfg().DefaultTenant,
 				utils.FirstNonEmpty(reqProcessor.Timezone,
 					da.cgrCfg.GeneralCfg().DefaultTimezone),
-				da.filterS, nil, nil))
+				da.filterS, nil))
 		if lclProcessed {
 			processed = lclProcessed
 		}
@@ -530,7 +530,7 @@ func (da *DiameterAgent) sendASR(originID string, reply *string) (err error) {
 		newDADataProvider(dmd.c, dmd.m),
 		dmd.vars, nil, nil, nil, nil,
 		da.cgrCfg.GeneralCfg().DefaultTenant,
-		da.cgrCfg.GeneralCfg().DefaultTimezone, da.filterS, nil, nil)
+		da.cgrCfg.GeneralCfg().DefaultTimezone, da.filterS, nil)
 	if err = aReq.SetFields(da.cgrCfg.TemplatesCfg()[da.cgrCfg.DiameterAgentCfg().ASRTemplate]); err != nil {
 		utils.Logger.Warning(
 			fmt.Sprintf("<%s> cannot disconnect session with OriginID: <%s>, err: %s",
@@ -573,7 +573,7 @@ func (da *DiameterAgent) V1ReAuthorize(originID string, reply *string) (err erro
 		newDADataProvider(dmd.c, dmd.m),
 		dmd.vars, nil, nil, nil, nil,
 		da.cgrCfg.GeneralCfg().DefaultTenant,
-		da.cgrCfg.GeneralCfg().DefaultTimezone, da.filterS, nil, nil)
+		da.cgrCfg.GeneralCfg().DefaultTimezone, da.filterS, nil)
 	if err = aReq.SetFields(da.cgrCfg.TemplatesCfg()[da.cgrCfg.DiameterAgentCfg().RARTemplate]); err != nil {
 		utils.Logger.Warning(
 			fmt.Sprintf("<%s> cannot send RAR with OriginID: <%s>, err: %s",
diff --git a/agents/diamagent_test.go b/agents/diamagent_test.go
index d3f315325..4f26b140d 100644
--- a/agents/diamagent_test.go
+++ b/agents/diamagent_test.go
@@ -443,7 +443,7 @@ func TestProcessRequest(t *testing.T) {
 	reqProcessor.Flags = utils.FlagsWithParamsFromSlice([]string{utils.MetaAuthorize, utils.MetaAccounts})
 	agReq := NewAgentRequest(diamDP, reqVars, cgrRplyNM, rply, nil,
 		reqProcessor.Tenant, config.CgrConfig().GeneralCfg().DefaultTenant,
-		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil, nil)
+		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil)
 
 	internalSessionSChan := make(chan rpcclient.ClientConnector, 1)
 	internalSessionSChan <- sS
@@ -471,7 +471,7 @@ func TestProcessRequest(t *testing.T) {
 
 	agReq = NewAgentRequest(diamDP, reqVars, cgrRplyNM, rply, nil,
 		reqProcessor.Tenant, config.CgrConfig().GeneralCfg().DefaultTenant,
-		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil, nil)
+		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil)
 
 	pr, err = da.processRequest(reqProcessor, agReq)
 	if err != nil {
@@ -488,7 +488,7 @@ func TestProcessRequest(t *testing.T) {
 
 	agReq = NewAgentRequest(diamDP, reqVars, cgrRplyNM, rply, nil,
 		reqProcessor.Tenant, config.CgrConfig().GeneralCfg().DefaultTenant,
-		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil, nil)
+		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil)
 
 	pr, err = da.processRequest(reqProcessor, agReq)
 	if err != nil {
@@ -511,7 +511,7 @@ func TestProcessRequest(t *testing.T) {
 
 	agReq = NewAgentRequest(diamDP, reqVars, cgrRplyNM, rply, nil,
 		reqProcessor.Tenant, config.CgrConfig().GeneralCfg().DefaultTenant,
-		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil, nil)
+		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil)
 
 	pr, err = da.processRequest(reqProcessor, agReq)
 	if err != nil {
@@ -528,7 +528,7 @@ func TestProcessRequest(t *testing.T) {
 
 	agReq = NewAgentRequest(diamDP, reqVars, cgrRplyNM, rply, nil,
 		reqProcessor.Tenant, config.CgrConfig().GeneralCfg().DefaultTenant,
-		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil, nil)
+		config.CgrConfig().GeneralCfg().DefaultTimezone, filters, nil)
 
 	pr, err = da.processRequest(reqProcessor, agReq)
 	if err != nil {
diff --git a/agents/dnsagent.go b/agents/dnsagent.go
index 1aa9069b6..ef7a20e66 100644
--- a/agents/dnsagent.go
+++ b/agents/dnsagent.go
@@ -129,7 +129,7 @@ func (da *DNSAgent) handleMessage(w dns.ResponseWriter, req *dns.Msg) {
 				da.cgrCfg.GeneralCfg().DefaultTenant,
 				utils.FirstNonEmpty(da.cgrCfg.DNSAgentCfg().Timezone,
 					da.cgrCfg.GeneralCfg().DefaultTimezone),
-				da.fltrS, nil, nil))
+				da.fltrS, nil))
 		if lclProcessed {
 			processed = lclProcessed
 		}
diff --git a/agents/httpagent.go b/agents/httpagent.go
index 26912d552..353217d1d 100644
--- a/agents/httpagent.go
+++ b/agents/httpagent.go
@@ -72,7 +72,7 @@ func (ha *HTTPAgent) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 			opts, reqProcessor.Tenant, ha.dfltTenant,
 			utils.FirstNonEmpty(reqProcessor.Timezone,
 				config.CgrConfig().GeneralCfg().DefaultTimezone),
-			ha.filterS, nil, nil)
+			ha.filterS, nil)
 		lclProcessed, err := ha.processRequest(reqProcessor, agReq)
 		if err != nil {
 			utils.Logger.Warning(
diff --git a/agents/libdiam.go b/agents/libdiam.go
index ad21930e2..41b074d28 100644
--- a/agents/libdiam.go
+++ b/agents/libdiam.go
@@ -466,7 +466,7 @@ func diamErr(m *diam.Message, resCode uint32,
 	aReq := NewAgentRequest(
 		newDADataProvider(nil, m), reqVars,
 		nil, nil, nil, nil,
-		tnt, tmz, filterS, nil, nil)
+		tnt, tmz, filterS, nil)
 	if err = aReq.SetFields(tpl); err != nil {
 		return
 	}
diff --git a/agents/libdiam_test.go b/agents/libdiam_test.go
index cf065390b..6a5f0daf3 100644
--- a/agents/libdiam_test.go
+++ b/agents/libdiam_test.go
@@ -1149,7 +1149,7 @@ func TestFilterWithDiameterDP(t *testing.T) {
 	dm := engine.NewDataManager(engine.NewInternalDB(nil, nil, true),
 		config.CgrConfig().CacheCfg(), nil)
 	filterS := engine.NewFilterS(cfg, nil, dm)
-	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil, nil)
+	agReq := NewAgentRequest(dP, nil, nil, nil, nil, nil, "cgrates.org", "", filterS, nil)
 
 	if pass, err := filterS.Pass("cgrates.org",
 		[]string{"*exists:~*req.Multiple-Services-Credit-Control.Rating-Group[~Rating-Group(99)]:"}, agReq); err != nil {
diff --git a/agents/librad_test.go b/agents/librad_test.go
index 0c46ebd53..c56d8c2ab 100644
--- a/agents/librad_test.go
+++ b/agents/librad_test.go
@@ -89,7 +89,7 @@ func TestRadReplyAppendAttributes(t *testing.T) {
 	for _, v := range rplyFlds {
 		v.ComputePath()
 	}
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", nil, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", nil, nil)
 	agReq.CGRReply.Set([]string{utils.CapMaxUsage}, utils.NewLeafNode(time.Hour))
 	agReq.CGRReply.Set([]string{utils.CapAttributes, "RadReply"}, utils.NewLeafNode("AccessAccept"))
 	agReq.CGRReply.Set([]string{utils.CapAttributes, utils.AccountField}, utils.NewLeafNode("1001"))
diff --git a/agents/libsip.go b/agents/libsip.go
index c8fab905a..e8eee6416 100644
--- a/agents/libsip.go
+++ b/agents/libsip.go
@@ -50,7 +50,7 @@ func sipErr(m utils.DataProvider, sipMessage sipingo.Message,
 	aReq := NewAgentRequest(
 		m, reqVars,
 		nil, nil, nil, nil,
-		tnt, tmz, filterS, nil, nil)
+		tnt, tmz, filterS, nil)
 	if err = aReq.SetFields(tpl); err != nil {
 		return
 	}
diff --git a/agents/libsip_test.go b/agents/libsip_test.go
index 32178e7a9..98af5def9 100644
--- a/agents/libsip_test.go
+++ b/agents/libsip_test.go
@@ -41,7 +41,7 @@ func TestUpdateSIPMsgFromNavMap(t *testing.T) {
 	for _, v := range rplyFlds {
 		v.ComputePath()
 	}
-	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", nil, nil, nil)
+	agReq := NewAgentRequest(nil, nil, nil, nil, nil, nil, "cgrates.org", "", nil, nil)
 	agReq.CGRReply.Set([]string{utils.CapMaxUsage}, utils.NewLeafNode(time.Hour))
 	agReq.CGRReply.Set([]string{utils.CapAttributes, "Request"}, utils.NewLeafNode("SIP/2.0 302 Moved Temporarily"))
 	agReq.CGRReply.Set([]string{utils.CapAttributes, utils.AccountField}, utils.NewLeafNode("1001"))
diff --git a/agents/radagent.go b/agents/radagent.go
index b88621be5..803f4b5c1 100644
--- a/agents/radagent.go
+++ b/agents/radagent.go
@@ -89,7 +89,7 @@ func (ra *RadiusAgent) handleAuth(req *radigo.Packet) (rpl *radigo.Packet, err e
 			reqProcessor.Tenant, ra.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(reqProcessor.Timezone,
 				config.CgrConfig().GeneralCfg().DefaultTimezone),
-			ra.filterS, nil, nil)
+			ra.filterS, nil)
 		agReq.Vars.Map[MetaRadReqType] = utils.NewLeafNode(MetaRadAuth)
 		var lclProcessed bool
 		if lclProcessed, err = ra.processRequest(req, reqProcessor, agReq, rpl); lclProcessed {
@@ -134,7 +134,7 @@ func (ra *RadiusAgent) handleAcct(req *radigo.Packet) (rpl *radigo.Packet, err e
 			reqProcessor.Tenant, ra.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(reqProcessor.Timezone,
 				config.CgrConfig().GeneralCfg().DefaultTimezone),
-			ra.filterS, nil, nil)
+			ra.filterS, nil)
 		var lclProcessed bool
 		if lclProcessed, err = ra.processRequest(req, reqProcessor, agReq, rpl); lclProcessed {
 			processed = lclProcessed
diff --git a/agents/sipagent.go b/agents/sipagent.go
index 9f46f2a24..29def5824 100644
--- a/agents/sipagent.go
+++ b/agents/sipagent.go
@@ -332,7 +332,7 @@ func (sa *SIPAgent) handleMessage(sipMessage sipingo.Message, remoteHost string)
 			opts, reqProcessor.Tenant, sa.cfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(reqProcessor.Timezone,
 				config.CgrConfig().GeneralCfg().DefaultTimezone),
-			sa.filterS, nil, nil)
+			sa.filterS, nil)
 		var lclProcessed bool
 		if lclProcessed, err = sa.processRequest(reqProcessor, agReq); err != nil {
 			utils.Logger.Warning(
diff --git a/apier/v1/dispatchersv1_it_test.go b/apier/v1/dispatchersv1_it_test.go
index b87b6eb22..10d90ddcb 100644
--- a/apier/v1/dispatchersv1_it_test.go
+++ b/apier/v1/dispatchersv1_it_test.go
@@ -204,8 +204,8 @@ func testDspDspv1GetProfileForEventWithMethod(t *testing.T) {
 		ID:     "testDspv2",
 		Event:  map[string]interface{}{},
 		APIOpts: map[string]interface{}{
-			utils.Subsys:               utils.MetaAny,
-			utils.OptsDispatcherMethod: utils.DispatcherSv1GetProfileForEvent,
+			utils.Subsys:     utils.MetaAny,
+			utils.OptsMethod: utils.DispatcherSv1GetProfileForEvent,
 		},
 	}
 	var reply engine.DispatcherProfile
diff --git a/config/config_defaults.go b/config/config_defaults.go
index 20d967a50..70a238a4c 100644
--- a/config/config_defaults.go
+++ b/config/config_defaults.go
@@ -382,6 +382,9 @@ const CGRATES_CFG_JSON = `
 				// "fstFailedCallsPrefix": ""					// Used in case of flatstore CDRs to avoid searching for BYE records
 				// "fstRecordCacheTTL": "1s"					// Duration to cache partial records when not pairing
 				// "fstLazyQuotes": false,						// if a quote may appear in an unquoted field and a non-doubled quote may appear in a quoted field
+				"fstMethod": "~*req.1",							// the rsr parser that will determine the method of the current record
+				"fstOriginID": "~*req.3;~*req.1;~*req.2",		// the rsr parser that will determine the originID of the current record
+				"fstMadatoryACK": false,						// if we should receive the ACK before processing the record
 
 				// FileXML
 				"xmlRootPath": "",								// path towards one event in case of XML CDRs
diff --git a/config/slicedp.go b/config/slicedp.go
index adb99edd3..9d2cc499d 100644
--- a/config/slicedp.go
+++ b/config/slicedp.go
@@ -30,7 +30,7 @@ import (
 func NewSliceDP(record []string, indxAls map[string]int) (dP utils.DataProvider) {
 	return &SliceDP{
 		req:    record,
-		cache:  utils.MapStorage{},
+		cache:  utils.MapStorage{utils.Length: len(record)},
 		idxAls: indxAls,
 	}
 }
diff --git a/config/slicedp_test.go b/config/slicedp_test.go
index e44335a1c..0a366d584 100644
--- a/config/slicedp_test.go
+++ b/config/slicedp_test.go
@@ -43,7 +43,7 @@ func TestNewSliceDp(t *testing.T) {
 	}
 	expected := &SliceDP{
 		req:    record,
-		cache:  utils.MapStorage{},
+		cache:  utils.MapStorage{utils.Length: len(record)},
 		idxAls: index,
 	}
 	if newSliceDP := NewSliceDP(record, index); !reflect.DeepEqual(expected, newSliceDP) {
diff --git a/data/conf/samples/ers_internal/cgrates.json b/data/conf/samples/ers_internal/cgrates.json
index 36715d226..c97d4aae9 100644
--- a/data/conf/samples/ers_internal/cgrates.json
+++ b/data/conf/samples/ers_internal/cgrates.json
@@ -355,6 +355,7 @@
 				{"tag": "Destination", "path": "*cgreq.Destination", "type": "*variable", "value": "~*req.9", "mandatory": true},
 				{"tag": "SetupTime", "path": "*cgreq.SetupTime", "type": "*variable", "value": "~*req.6", "mandatory": true},
 				{"tag": "AnswerTime", "path": "*cgreq.AnswerTime", "type": "*variable", "value": "~*req.6", "mandatory": true},
+				{"tag": "Usage", "path": "*cgreq.Usage", "type": "*constant","value": "0", "mandatory": true, "filters": ["*prefix:~*vars.FileName:missed_calls"]},
 				{"tag": "Usage", "path": "*cgreq.Usage", "type": "*variable", "mandatory": true}, // Value for Usage is composed based on record
 				{"tag": "DisconnectCause", "path": "*cgreq.DisconnectCause", "type": "*variable", "value": "~*req.4; ;~*req.5", "mandatory": true},
 				{"tag": "DialogId", "path": "*cgreq.DialogId", "type": "*variable", "value": "~*req.11"}
diff --git a/ers/amqp.go b/ers/amqp.go
index 41657cd27..3dfa23dce 100644
--- a/ers/amqp.go
+++ b/ers/amqp.go
@@ -191,7 +191,7 @@ func (rdr *AMQPER) processMessage(msg []byte) (err error) {
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	var pass bool
 	if pass, err = rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
diff --git a/ers/amqpv1.go b/ers/amqpv1.go
index 1c1297796..9c6328271 100644
--- a/ers/amqpv1.go
+++ b/ers/amqpv1.go
@@ -164,7 +164,7 @@ func (rdr *AMQPv1ER) processMessage(msg []byte) (err error) {
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	var pass bool
 	if pass, err = rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
diff --git a/ers/filecsv.go b/ers/filecsv.go
index 13b90c9c2..d54de29c7 100644
--- a/ers/filecsv.go
+++ b/ers/filecsv.go
@@ -171,7 +171,7 @@ func (rdr *CSVFileER) processFile(fPath, fName string) (err error) {
 			rdr.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(rdr.Config().Timezone,
 				rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-			rdr.fltrS, nil, nil) // create an AgentRequest
+			rdr.fltrS, nil) // create an AgentRequest
 		if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 			agReq); err != nil {
 			utils.Logger.Warning(
diff --git a/ers/filefwv.go b/ers/filefwv.go
index ea7455d59..23a95ab3b 100644
--- a/ers/filefwv.go
+++ b/ers/filefwv.go
@@ -200,7 +200,7 @@ func (rdr *FWVFileER) processFile(fPath, fName string) (err error) {
 			rdr.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(rdr.Config().Timezone,
 				rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-			rdr.fltrS, rdr.headerDP, rdr.trailerDP) // create an AgentRequest
+			rdr.fltrS, map[string]utils.DataProvider{utils.MetaHdr: rdr.headerDP, utils.MetaTrl: rdr.trailerDP}) // create an AgentRequest
 		if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 			agReq); err != nil {
 			utils.Logger.Warning(
@@ -295,7 +295,7 @@ func (rdr *FWVFileER) processTrailer(file *os.File, rowNr, evsPosted int, absPat
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, rdr.trailerDP) // create an AgentRequest
+		rdr.fltrS, map[string]utils.DataProvider{utils.MetaTrl: rdr.trailerDP}) // create an AgentRequest
 	if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
 		return err
@@ -335,7 +335,7 @@ func (rdr *FWVFileER) createHeaderMap(record string, rowNr, evsPosted int, absPa
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, rdr.headerDP, nil) // create an AgentRequest
+		rdr.fltrS, map[string]utils.DataProvider{utils.MetaHdr: rdr.headerDP}) // create an AgentRequest
 	if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
 		return err
diff --git a/ers/filejson.go b/ers/filejson.go
index a3a98f2c3..04c8aa40b 100644
--- a/ers/filejson.go
+++ b/ers/filejson.go
@@ -152,7 +152,7 @@ func (rdr *JSONFileER) processFile(fPath, fName string) (err error) {
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil {
 		utils.Logger.Warning(
diff --git a/ers/filexml.go b/ers/filexml.go
index dea7ae517..6c0793b5c 100644
--- a/ers/filexml.go
+++ b/ers/filexml.go
@@ -148,7 +148,7 @@ func (rdr *XMLFileER) processFile(fPath, fName string) (err error) {
 			rdr.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(rdr.Config().Timezone,
 				rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-			rdr.fltrS, nil, nil) // create an AgentRequest
+			rdr.fltrS, nil) // create an AgentRequest
 		if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 			agReq); err != nil {
 			utils.Logger.Warning(
diff --git a/ers/flatstore.go b/ers/flatstore.go
index c20638414..67d8f0c82 100644
--- a/ers/flatstore.go
+++ b/ers/flatstore.go
@@ -20,12 +20,10 @@ package ers
 
 import (
 	"encoding/csv"
-	"errors"
 	"fmt"
 	"io"
 	"os"
 	"path"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -39,9 +37,8 @@ import (
 )
 
 type fstRecord struct {
-	inv      []string
-	bye      []string
-	ack      []string
+	method   string
+	values   []string
 	fileName string
 }
 
@@ -162,7 +159,20 @@ func (rdr *FlatstoreER) processFile(fPath, fName string) (err error) {
 	evsPosted := 0
 	timeStart := time.Now()
 	reqVars := &utils.DataNode{Type: utils.NMMapType, Map: map[string]*utils.DataNode{utils.FileName: utils.NewLeafNode(fName)}}
-	failCallPrfx := utils.IfaceAsString(rdr.Config().Opts[utils.FstFailedCallsPrefixOpt])
+	faildCallPrfx := utils.IfaceAsString(rdr.Config().Opts[utils.FstFailedCallsPrefixOpt])
+	failedCallsFile := len(faildCallPrfx) != 0 && strings.HasPrefix(fName, faildCallPrfx)
+	var methodTmp config.RSRParsers
+	if methodTmp, err = config.NewRSRParsers(utils.IfaceAsString(rdr.Config().Opts[utils.FstMethodOpt]), rdr.cgrCfg.GeneralCfg().RSRSep); err != nil {
+		return
+	}
+	var originTmp config.RSRParsers
+	if originTmp, err = config.NewRSRParsers(utils.IfaceAsString(rdr.Config().Opts[utils.FstOriginIDOpt]), rdr.cgrCfg.GeneralCfg().RSRSep); err != nil {
+		return
+	}
+	var mandatoryAcK bool
+	if mandatoryAcK, err = utils.IfaceAsBool(rdr.Config().Opts[utils.FstMadatoryACKOpt]); err != nil {
+		return
+	}
 	for {
 		var record []string
 		if record, err = csvReader.Read(); err != nil {
@@ -172,48 +182,46 @@ func (rdr *FlatstoreER) processFile(fPath, fName string) (err error) {
 			}
 			return
 		}
-		if strings.HasPrefix(fName, failCallPrfx) { // Use the first index since they should be the same in all configs
-			record = append(record, "0") // Append duration 0 for failed calls flatstore CDR
-		} else {
-			pr, err := NewUnpairedRecord(record, utils.FirstNonEmpty(rdr.Config().Timezone,
-				rdr.cgrCfg.GeneralCfg().DefaultTimezone), fName)
-			if err != nil {
-				utils.Logger.Warning(
-					fmt.Sprintf("<%s> Converting row : <%s> to unpairedRecord , ignoring due to error: <%s>",
-						utils.ERs, record, err.Error()))
-				continue
-			}
-			if val, has := rdr.cache.Get(pr.OriginID); !has {
-				rdr.cache.Set(pr.OriginID, pr, nil)
-				continue
-			} else {
-				pair := val.(*UnpairedRecord)
-				record, err = pairToRecord(pair, pr)
-				if err != nil {
-					utils.Logger.Warning(
-						fmt.Sprintf("<%s> Merging unpairedRecords : <%s> and <%s> to record , ignoring due to error: <%s>",
-							utils.ERs, utils.ToJSON(pair), utils.ToJSON(pr), err.Error()))
-					continue
-				}
-				rdr.cache.Set(pr.OriginID, nil, nil)
-				rdr.cache.Remove(pr.OriginID)
-			}
+		req := config.NewSliceDP(record, nil)
+		tmpReq := utils.MapStorage{utils.MetaReq: req}
+		var method string
+		if method, err = methodTmp.ParseDataProvider(tmpReq); err != nil {
+			return
+		} else if method != utils.FstInvite &&
+			method != utils.FstBye &&
+			method != utils.FstAck {
+			return fmt.Errorf("Unsuported method<%s>", method)
 		}
 
-		// build Usage from Fields based on record lenght
-		for i, cntFld := range rdr.Config().Fields {
-			if cntFld.Path == utils.MetaCgreq+utils.NestingSep+utils.Usage {
-				rdr.Config().Fields[i].Value = config.NewRSRParsersMustCompile("~*req."+strconv.Itoa(len(record)-1), utils.InfieldSep) // in case of flatstore, last element will be the duration computed by us
-			}
+		var originID string
+		if originID, err = originTmp.ParseDataProvider(tmpReq); err != nil {
+			return
 		}
+
+		records := rdr.cache.GetGroupItems(originID)
+
+		if lrecords := len(records); !failedCallsFile && // do not set in cache if we know that the calls are failed
+			(lrecords == 0 ||
+				(mandatoryAcK && lrecords != 2) ||
+				(!mandatoryAcK && lrecords != 1)) {
+			rdr.cache.Set(utils.ConcatenatedKey(originID, method), &fstRecord{method: method, values: record, fileName: fName}, []string{originID})
+			continue
+		}
+		rdr.cache.RemoveGroup(originID)
+		extraDP := map[string]utils.DataProvider{method: req}
+		for _, record := range records {
+			req := record.(*fstRecord)
+			extraDP[req.method] = config.NewSliceDP(req.values, nil)
+		}
+
 		rowNr++ // increment the rowNr after checking if it's not the end of file
 		agReq := agents.NewAgentRequest(
-			config.NewSliceDP(record, nil), reqVars,
+			req, reqVars,
 			nil, nil, nil, rdr.Config().Tenant,
 			rdr.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(rdr.Config().Timezone,
 				rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-			rdr.fltrS, nil, nil) // create an AgentRequest
+			rdr.fltrS, extraDP) // create an AgentRequest
 		if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 			agReq); err != nil {
 			utils.Logger.Warning(
@@ -251,6 +259,7 @@ func (rdr *FlatstoreER) processFile(fPath, fName string) (err error) {
 	return
 }
 
+/*
 func NewUnpairedRecord(record []string, timezone string, fileName string) (*UnpairedRecord, error) {
 	if len(record) < 7 {
 		return nil, errors.New("MISSING_IE")
@@ -309,14 +318,14 @@ func pairToRecord(part1, part2 *UnpairedRecord) ([]string, error) {
 	record = append(record, strconv.FormatFloat(callDur.Seconds(), 'f', -1, 64))
 	return record, nil
 }
-
+*/
 func (rdr *FlatstoreER) dumpToFile(itmID string, value interface{}) {
 	if value == nil {
 		return
 	}
-	unpRcd := value.(*UnpairedRecord)
+	unpRcd := value.(*fstRecord)
 
-	dumpFilePath := path.Join(rdr.Config().ProcessedPath, unpRcd.FileName+utils.TmpSuffix)
+	dumpFilePath := path.Join(rdr.Config().ProcessedPath, unpRcd.fileName+utils.TmpSuffix)
 	fileOut, err := os.Create(dumpFilePath)
 	if err != nil {
 		utils.Logger.Err(fmt.Sprintf("<%s> Failed creating %s, error: %s",
@@ -325,11 +334,11 @@ func (rdr *FlatstoreER) dumpToFile(itmID string, value interface{}) {
 	}
 	csvWriter := csv.NewWriter(fileOut)
 	csvWriter.Comma = rune(utils.IfaceAsString(rdr.Config().Opts[utils.FlatstorePrfx+utils.FieldSepOpt])[0])
-	if err = csvWriter.Write(unpRcd.Values); err != nil {
+	if err = csvWriter.Write(unpRcd.values); err != nil {
 		utils.Logger.Err(fmt.Sprintf("<%s> Failed writing partial record %v to file: %s, error: %s",
-			utils.ERs, unpRcd.Values, dumpFilePath, err.Error()))
-		return
+			utils.ERs, unpRcd.values, dumpFilePath, err.Error()))
+		// return // let it close the opened file
 	}
-
 	csvWriter.Flush()
+	fileOut.Close()
 }
diff --git a/ers/flatstore_it_test.go b/ers/flatstore_it_test.go
index ba201ffe5..a8953e984 100644
--- a/ers/flatstore_it_test.go
+++ b/ers/flatstore_it_test.go
@@ -303,12 +303,8 @@ func TestFlatstoreProcessEvent2(t *testing.T) {
 		rdrExit:   make(chan struct{}),
 		conReqs:   make(chan struct{}, 1),
 	}
-	record := []string{"BYE", "a", "ToR", "b", "c", "d", "2013-12-30T16:00:01Z", "f", "g", "h", "i", "j", "k", "l"}
-	pr, err := NewUnpairedRecord(record, utils.FirstNonEmpty(eR.Config().Timezone,
-		eR.cgrCfg.GeneralCfg().DefaultTimezone), fname)
-	if err != nil {
-		t.Error(err)
-	}
+	record := []string{utils.ByeCgr, "a", "ToR", "b", "c", "d", "2013-12-30T16:00:01Z", "f", "g", "h", "i", "j", "k", "l"}
+	pr := &fstRecord{method: utils.FstBye, values: record, fileName: fname}
 	eR.cache = ltcache.NewCache(ltcache.UnlimitedCaching, 0, false, eR.dumpToFile)
 	eR.cache.Set("baToR", pr, nil)
 	expEvent := &utils.CGREvent{
@@ -421,13 +417,8 @@ func TestFlatstoreProcessEvent2Error1(t *testing.T) {
 		rdrExit:   make(chan struct{}),
 		conReqs:   make(chan struct{}, 1),
 	}
-	record := []string{"BYE", "a", "ToR", "b", "c", "d", "invalid_time", "f", "g", "h", "i", "j", "k", "l"}
-	pr, err := NewUnpairedRecord(record, utils.FirstNonEmpty(eR.Config().Timezone,
-		eR.cgrCfg.GeneralCfg().DefaultTimezone), fname)
-	errExpect := "Unsupported time format"
-	if err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
+	record := []string{utils.ByeCgr, "a", "ToR", "b", "c", "d", "invalid_time", "f", "g", "h", "i", "j", "k", "l"}
+	pr := &fstRecord{method: utils.FstBye, values: record, fileName: fname}
 	eR.cache = ltcache.NewCache(ltcache.UnlimitedCaching, 0, false, eR.dumpToFile)
 	eR.cache.Set("baToR", pr, nil)
 
@@ -436,7 +427,7 @@ func TestFlatstoreProcessEvent2Error1(t *testing.T) {
 	if err := eR.processFile(filePath, fname); err != nil {
 		t.Error(err)
 	}
-	errExpect = "[WARNING] <ERs> Converting row : <[INVITE a ToR b c d invalid_time f g h i j k l]> to unpairedRecord , ignoring due to error: <Unsupported time format>"
+	errExpect := "[WARNING] <ERs> Converting row : <[INVITE a ToR b c d invalid_time f g h i j k l]> to unpairedRecord , ignoring due to error: <Unsupported time format>"
 	if rcv := buf.String(); !strings.Contains(rcv, errExpect) {
 		t.Errorf("\nExpected %v but \nreceived %v", errExpect, rcv)
 	}
@@ -482,11 +473,7 @@ func TestFlatstoreProcessEvent2Error2(t *testing.T) {
 		conReqs:   make(chan struct{}, 1),
 	}
 	record := []string{"INVITE", "a", "ToR", "b", "c", "d", "2013-12-30T16:00:01Z", "f", "g", "h", "i", "j", "k", "l"}
-	pr, err := NewUnpairedRecord(record, utils.FirstNonEmpty(eR.Config().Timezone,
-		eR.cgrCfg.GeneralCfg().DefaultTimezone), fname)
-	if err != nil {
-		t.Error(err)
-	}
+	pr := &fstRecord{method: utils.FstInvite, values: record, fileName: fname}
 	eR.cache = ltcache.NewCache(ltcache.UnlimitedCaching, 0, false, eR.dumpToFile)
 	eR.cache.Set("baToR", pr, nil)
 	eR.conReqs <- struct{}{}
@@ -708,28 +695,3 @@ func TestFlatstoreServeErrTimeDurationNeg1(t *testing.T) {
 		t.Errorf("\nExpected <%+v>, \nReceived <%+v>", expected, err)
 	}
 }
-func TestDumpToFileErr(t *testing.T) {
-	cfg := config.NewDefaultCGRConfig()
-	fltrs := &engine.FilterS{}
-	eR := &FlatstoreER{
-		cgrCfg:    cfg,
-		cfgIdx:    0,
-		fltrS:     fltrs,
-		rdrDir:    "/tmp/flatstoreErs/out",
-		rdrEvents: make(chan *erEvent, 1),
-		rdrError:  make(chan error, 1),
-		rdrExit:   make(chan struct{}),
-		conReqs:   make(chan struct{}, 1),
-	}
-	part1 := &UnpairedRecord{
-		Method: "BYE",
-		Values: []string{"value1", "value2", "value3", "value4", "value5"},
-	}
-	eR.conReqs <- struct{}{}
-	eR.dumpToFile("ID1", part1)
-	errExpect := "open /var/spool/cgrates/ers/out/.tmp: no such file or directory"
-	_, err := os.Open(path.Join(eR.Config().ProcessedPath, part1.FileName+utils.TmpSuffix))
-	if err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
-}
diff --git a/ers/flatstore_test.go b/ers/flatstore_test.go
index ba116a8d8..1c96f4517 100644
--- a/ers/flatstore_test.go
+++ b/ers/flatstore_test.go
@@ -23,7 +23,6 @@ import (
 	"testing"
 	"time"
 
-	"github.com/cgrates/cgrates/engine"
 	"github.com/cgrates/cgrates/utils"
 
 	"github.com/cgrates/cgrates/config"
@@ -113,115 +112,3 @@ func TestFlatstoreServeNil(t *testing.T) {
 		t.Errorf("\nExpected: <%+v>, \nreceived: <%+v>", nil, err)
 	}
 }
-
-func TestNewUnpairedRecordErr(t *testing.T) {
-	record := []string{"invalid"}
-	timezone, _ := time.Time.Zone(time.Now())
-	fileName := "testfile.csv"
-	errExpect := "MISSING_IE"
-	_, err := NewUnpairedRecord(record, timezone, fileName)
-	if err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
-}
-
-func TestPairToRecord(t *testing.T) {
-	part1 := &UnpairedRecord{
-		Method: "INVITE",
-		Values: []string{"value1", "value2", "value3", "value4", "value5", "value6"},
-	}
-	part2 := &UnpairedRecord{
-		Method: "BYE",
-		Values: []string{"value1", "value2", "value3", "value4", "value5", "value6"},
-	}
-	rcv, err := pairToRecord(part1, part2)
-	rcvExpect := append(part1.Values, "0")
-	if err != nil {
-		t.Error(err)
-	} else if !reflect.DeepEqual(rcv, rcvExpect) {
-		t.Errorf("Expected %v but received %v", rcvExpect, rcv)
-	}
-
-	part1.Values = append(part1.Values, "value7", "value8")
-	part2.Values = append(part2.Values, "value7", "value8")
-	_, err = pairToRecord(part1, part2)
-	if err != nil {
-		t.Error(err)
-	} else if !reflect.DeepEqual(part1.Values[7], part2.Values[7]) {
-		t.Errorf("Last INVITE value does not match last BYE value")
-	}
-
-	cfg := config.NewDefaultCGRConfig()
-	fltrs := &engine.FilterS{}
-	eR := &FlatstoreER{
-		cgrCfg:    cfg,
-		cfgIdx:    0,
-		fltrS:     fltrs,
-		rdrDir:    "/tmp/flatstoreErs/out",
-		rdrEvents: make(chan *erEvent, 1),
-		rdrError:  make(chan error, 1),
-		rdrExit:   make(chan struct{}),
-		conReqs:   make(chan struct{}, 1),
-	}
-	eR.conReqs <- struct{}{}
-	eR.Config().ProcessedPath = "/tmp"
-	part1.FileName = "testfile"
-	eR.dumpToFile("ID1", nil)
-	eR.dumpToFile("ID1", part1)
-	part1.Values = []string{"\n"}
-	eR.dumpToFile("ID1", part1)
-}
-
-func TestPairToRecordReverse(t *testing.T) {
-	part1 := &UnpairedRecord{
-		Method: "BYE",
-		Values: []string{"value1", "value2", "value3", "value4", "value5"},
-	}
-	part2 := &UnpairedRecord{
-		Method: "INVITE",
-		Values: []string{"value1", "value2", "value3", "value4", "value5"},
-	}
-	rcv, err := pairToRecord(part1, part2)
-	rcvExpect := append(part1.Values, "0")
-	if err != nil {
-		t.Error(err)
-	} else if !reflect.DeepEqual(rcv, rcvExpect) {
-		t.Errorf("Expected %v but received %v", rcvExpect, rcv)
-	}
-}
-
-func TestPairToRecordErrors(t *testing.T) {
-	part1 := &UnpairedRecord{
-		Method: "INVITE",
-		Values: []string{"value1", "value2", "value3", "value4", "value5"},
-	}
-	part2 := &UnpairedRecord{
-		Method: "INVITE",
-	}
-	errExpect := "MISSING_BYE"
-	if _, err := pairToRecord(part1, part2); err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
-
-	errExpect = "INCONSISTENT_VALUES_LENGTH"
-	part2.Method = "BYE"
-	if _, err := pairToRecord(part1, part2); err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
-
-	part1.Method = "BYE"
-	errExpect = "MISSING_INVITE"
-	if _, err := pairToRecord(part1, part2); err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
-}
-
-func TestNewUnpairedRecordErrTimezone(t *testing.T) {
-	record := []string{"TEST1", "TEST2", "TEST3", "TEST4", "TEST5", "TEST6", "TEST7"}
-	timezone, _ := time.Now().UTC().Zone()
-	fileName := "testfile.csv"
-	errExpect := "Unsupported time format"
-	if _, err := NewUnpairedRecord(record, timezone, fileName); err == nil || err.Error() != errExpect {
-		t.Errorf("Expected %v but received %v", errExpect, err)
-	}
-}
diff --git a/ers/kafka.go b/ers/kafka.go
index fe066771c..d02bd5197 100644
--- a/ers/kafka.go
+++ b/ers/kafka.go
@@ -160,7 +160,7 @@ func (rdr *KafkaER) processMessage(msg []byte) (err error) {
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	var pass bool
 	if pass, err = rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
diff --git a/ers/partial_csv.go b/ers/partial_csv.go
index 736146834..b1fa204f9 100644
--- a/ers/partial_csv.go
+++ b/ers/partial_csv.go
@@ -186,7 +186,7 @@ func (rdr *PartialCSVFileER) processFile(fPath, fName string) (err error) {
 			rdr.cgrCfg.GeneralCfg().DefaultTenant,
 			utils.FirstNonEmpty(rdr.Config().Timezone,
 				rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-			rdr.fltrS, nil, nil) // create an AgentRequest
+			rdr.fltrS, nil) // create an AgentRequest
 		if pass, err := rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 			agReq); err != nil {
 			utils.Logger.Warning(
diff --git a/ers/s3.go b/ers/s3.go
index d302e0673..e1ea1d60a 100644
--- a/ers/s3.go
+++ b/ers/s3.go
@@ -126,7 +126,7 @@ func (rdr *S3ER) processMessage(body []byte) (err error) {
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	var pass bool
 	if pass, err = rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
diff --git a/ers/sql.go b/ers/sql.go
index 1ec4591cb..872bc1b69 100644
--- a/ers/sql.go
+++ b/ers/sql.go
@@ -242,7 +242,7 @@ func (rdr *SQLEventReader) processMessage(msg map[string]interface{}) (err error
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	var pass bool
 	if pass, err = rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
diff --git a/ers/sqs.go b/ers/sqs.go
index 1daf31b2e..a9bad2cef 100644
--- a/ers/sqs.go
+++ b/ers/sqs.go
@@ -114,7 +114,7 @@ func (rdr *SQSER) processMessage(body []byte) (err error) {
 		rdr.cgrCfg.GeneralCfg().DefaultTenant,
 		utils.FirstNonEmpty(rdr.Config().Timezone,
 			rdr.cgrCfg.GeneralCfg().DefaultTimezone),
-		rdr.fltrS, nil, nil) // create an AgentRequest
+		rdr.fltrS, nil) // create an AgentRequest
 	var pass bool
 	if pass, err = rdr.fltrS.Pass(agReq.Tenant, rdr.Config().Filters,
 		agReq); err != nil || !pass {
diff --git a/utils/consts.go b/utils/consts.go
index 0dc2082eb..06b310bb3 100644
--- a/utils/consts.go
+++ b/utils/consts.go
@@ -2467,7 +2467,6 @@ const (
 	OptsContext               = "*context"
 	Subsys                    = "*subsys"
 	OptsAttributesProcessRuns = "*processRuns"
-	OptsDispatcherMethod      = "*method"
 	MetaEventType             = "*eventType"
 	EventType                 = "EventType"
 	SchedulerInit             = "SchedulerInit"
@@ -2563,10 +2562,16 @@ const (
 	PartialCSVRecordCacheOpt       = "csvRecordCacheTTL"
 
 	// flatStore
-	FlatstorePrfx            = "fst"
+	FlatstorePrfx = "fst"
+	OptsMethod    = "*method"
+	FstInvite     = "INVITE"
+	FstBye        = "BYE"
+	FstAck        = "ACK"
+
 	FstFailedCallsPrefixOpt  = "fstFailedCallsPrefix"
 	FstPartialRecordCacheOpt = "fstRecordCacheTTL"
-	FstMethodOpt             = "fstMethod" //
+	FstMethodOpt             = "fstMethod"
+	FstOriginIDOpt           = "fstOriginID"
 	FstMadatoryACKOpt        = "fstMadatoryACK"
 
 	// fileXML