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-rw-r--r--whisper/whisperv6/envelope.go4
1 files changed, 4 insertions, 0 deletions
diff --git a/whisper/whisperv6/envelope.go b/whisper/whisperv6/envelope.go
index 2c80d47bc..2f947f1a4 100644
--- a/whisper/whisperv6/envelope.go
+++ b/whisper/whisperv6/envelope.go
@@ -208,6 +208,10 @@ func (e *Envelope) OpenSymmetric(key []byte) (msg *ReceivedMessage, err error) {
// Open tries to decrypt an envelope, and populates the message fields in case of success.
func (e *Envelope) Open(watcher *Filter) (msg *ReceivedMessage) {
+ if watcher == nil {
+ return nil
+ }
+
// The API interface forbids filters doing both symmetric and asymmetric encryption.
if watcher.expectsAsymmetricEncryption() && watcher.expectsSymmetricEncryption() {
return nil