Merge branch 'release' into dnf/notificationsbot

api/version_vars.go

 // Code generated by go generate; DO NOT EDIT.
 // This file was generated by robots at
-// 2021-04-16 13:10:29.436463 -0500 CDT m=+0.022389085
+// 2021-04-29 12:54:02.223688 -0500 CDT m=+0.028208749
 package api
 
-const GITVERSION = `6f9309c8 go fmt`
+const GITVERSION = `9c8c08ea prevent updating with an empty ndf`
 const SEMVER = "2.4.0"
 const DEPENDENCIES = `module gitlab.com/elixxir/client
 
@@ -13,26 +13,26 @@ require (
 	github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3
 	github.com/golang/protobuf v1.4.3
 	github.com/gopherjs/gopherjs v0.0.0-20200217142428-fce0ec30dd00 // indirect
-	github.com/magiconair/properties v1.8.4 // indirect
-	github.com/mitchellh/mapstructure v1.4.0 // indirect
-	github.com/pelletier/go-toml v1.8.1 // indirect
+	github.com/magiconair/properties v1.8.5 // indirect
+	github.com/mitchellh/mapstructure v1.4.1 // indirect
+	github.com/pelletier/go-toml v1.9.0 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/smartystreets/assertions v1.0.1 // indirect
-	github.com/spf13/afero v1.5.1 // indirect
 	github.com/spf13/cast v1.3.1 // indirect
-	github.com/spf13/cobra v1.1.1
+	github.com/spf13/cobra v1.1.3
 	github.com/spf13/jwalterweatherman v1.1.0
 	github.com/spf13/viper v1.7.1
 	gitlab.com/elixxir/bloomfilter v0.0.0-20200930191214-10e9ac31b228
-	gitlab.com/elixxir/comms v0.0.4-0.20210413160356-853e51fc18e5
-	gitlab.com/elixxir/crypto v0.0.7-0.20210412231025-6f75c577f803
+	gitlab.com/elixxir/comms v0.0.4-0.20210427005410-7ae183abda2a
+	gitlab.com/elixxir/crypto v0.0.7-0.20210427005255-4fe1bcf69c5a
 	gitlab.com/elixxir/ekv v0.1.5
-	gitlab.com/elixxir/primitives v0.0.3-0.20210409190923-7bf3cd8d97e7
-	gitlab.com/xx_network/comms v0.0.4-0.20210413212014-5e898f41f33a
-	gitlab.com/xx_network/crypto v0.0.5-0.20210405224157-2b1f387b42c1
+	gitlab.com/elixxir/primitives v0.0.3-0.20210427004615-c68ecf15fcf3
+	gitlab.com/xx_network/comms v0.0.4-0.20210426213447-82674e09e402
+	gitlab.com/xx_network/crypto v0.0.5-0.20210420170153-2a6276844076
 	gitlab.com/xx_network/primitives v0.0.4-0.20210402222416-37c1c4d3fac4
 	golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2
-	golang.org/x/sys v0.0.0-20210403161142-5e06dd20ab57 // indirect
+	golang.org/x/sys v0.0.0-20210426230700-d19ff857e887 // indirect
+	golang.org/x/text v0.3.6 // indirect
 	google.golang.org/genproto v0.0.0-20210105202744-fe13368bc0e1 // indirect
 	google.golang.org/grpc v1.34.0 // indirect
 	google.golang.org/protobuf v1.26.0-rc.1

network/gateway/hostPool.go

@@ -5,8 +5,9 @@
 // LICENSE file                                                              //
 ///////////////////////////////////////////////////////////////////////////////
 
-// Handles functionality related to providing Gateway connect.Host objects
+// Package gateway Handles functionality related to providing Gateway connect.Host objects
 // for message sending to the rest of the client repo
+// Used to minimize # of open connections on mobile clients
 
 package gateway
 
@@ -30,7 +31,8 @@ import (
 
 // List of errors that initiate a Host replacement
 var errorsList = []string{"context deadline exceeded", "connection refused", "host disconnected",
-	"transport is closing", "all SubConns are in TransientFailure", ndf.NO_NDF}
+	"transport is closing", "all SubConns are in TransientFailure", "Last try to connect",
+	ndf.NO_NDF, "Host is in cool down"}
 
 // HostManager Interface allowing storage and retrieval of Host objects
 type HostManager interface {
@@ -125,6 +127,11 @@ func newHostPool(poolParams PoolParams, rng *fastRNG.StreamGenerator, ndf *ndf.N
 
 // UpdateNdf Mutates internal ndf to the given ndf
 func (h *HostPool) UpdateNdf(ndf *ndf.NetworkDefinition) {
+	if len(ndf.Gateways) == 0 {
+		jww.WARN.Printf("Unable to UpdateNdf: no gateways available")
+		return
+	}
+
 	h.ndfMux.Lock()
 	h.ndf = ndf