directmedia: mark media retry decrypt failures as non-retryable

pkg/connector/directmedia.go

@@ -259,6 +259,7 @@ type directMediaRetry struct {
 	wait        *exsync.Event
 	requested   bool
 	resultType  waMmsRetry.MediaRetryNotification_ResultType
+	decryptFail bool
 }
 
 func (wa *WhatsAppClient) getDirectMediaRetryState(msgID networkid.MessageID, create bool) *directMediaRetry {
@@ -285,6 +286,9 @@ func (wa *WhatsAppClient) requestAndWaitDirectMedia(ctx context.Context, rawMsgI
 			keys.DirectPath = state.resultURL
 			return nil
 		}
+		if state.decryptFail {
+			return mautrix.MNotFound.WithMessage("Unable to retrieve media: failed to decrypt the media retry notification from your phone.")
+		}
 		switch state.resultType {
 		case waMmsRetry.MediaRetryNotification_NOT_FOUND:
 			return mautrix.MNotFound.WithMessage("This media was not found on your phone.")
@@ -338,6 +342,9 @@ func (wa *WhatsAppClient) receiveDirectMediaRetry(ctx context.Context, msg *data
 	retryData, err := whatsmeow.DecryptMediaRetryNotification(retry, keys.Key)
 	if err != nil {
 		log.Warn().Err(err).Msg("Failed to decrypt media retry notification")
+		if state != nil {
+			state.decryptFail = true
+		}
 		return
 	}
 	if state != nil {