Merge pull request #778 from keep-network/enable-strict-message-verif…

…ication

Enable pubsub strict message verification

When the strict message verification option is enabled in pubsub, peers
enforce message signing. Unsigned messages are immediately dropped. We
explicitly enable this as the package default is false.

pkg/net/libp2p/channel_manager.go

@@ -31,6 +31,7 @@ func newChannelManager(
 		ctx,
 		p2phost,
 		pubsub.WithMessageSigning(true),
+		pubsub.WithStrictSignatureVerification(true),
 	)
 	if err != nil {
 		return nil, err