Wait up to 3 seconds for encryption keys to arrive

main.go

@@ -44,7 +44,7 @@ var (
 	Name = "mautrix-whatsapp"
 	URL  = "https://github.com/tulir/mautrix-whatsapp"
 	// This is changed when making a release
-	Version   = "0.1.4"
+	Version = "0.1.4"
 	// This is filled by init()
 	WAVersion = ""
 	// These are filled at build time with the -X linker flag
@@ -134,7 +134,7 @@ type Bridge struct {
 	Formatter      *Formatter
 	Relaybot       *User
 	Crypto         Crypto
-	Metrics *MetricsHandler
+	Metrics        *MetricsHandler
 
 	usersByMXID         map[id.UserID]*User
 	usersByJID          map[types.WhatsAppID]*User
@@ -153,6 +153,7 @@ type Crypto interface {
 	HandleMemberEvent(*event.Event)
 	Decrypt(*event.Event) (*event.Event, error)
 	Encrypt(id.RoomID, event.Type, event.Content) (*event.EncryptedEventContent, error)
+	WaitForSession(id.RoomID, id.SenderKey, id.SessionID, time.Duration) bool
 	Init() error
 	Start()
 	Stop()