Use existing params when available

e2e/manager.go

@@ -173,6 +173,7 @@ func (m *manager) StartProcesses() (stoppable.Stoppable, error) {
 		recipient *id.ID, payload []byte,
 		cmixParams cmix.CMIXParams) (
 		[]id.Round, e2e.MessageID, time.Time, error) {
+		// FIXME: we should have access to the e2e params here...
 		par := GetDefaultParams()
 		par.CMIXParams = cmixParams
 		return m.SendE2E(mt, recipient, payload, par)

e2e/sendE2E.go

@@ -81,7 +81,7 @@ func (m *manager) sendE2E(mt catalog.MessageType, recipient *id.ID,
 			rekeySendFunc := func(mt catalog.MessageType, recipient *id.ID,
 				payload []byte, cmixParams cmix.CMIXParams) (
 				[]id.Round, e2e.MessageID, time.Time, error) {
-				par := GetDefaultParams()
+				par := params
 				par.CMIXParams = cmixParams
 				return m.SendE2E(mt, recipient, payload, par)
 			}