Newsletters: add 62 (2019-09-04)

Author: harding

_posts/en/newsletters/2019-09-04-newsletter.md

@@ -0,0 +1,60 @@
+---
+title: 'Bitcoin Optech Newsletter #62'
+permalink: /en/newsletters/2019/09/04/
+name: 2019-09-04-newsletter
+slug: 2019-09-04-newsletter
+type: newsletter
+layout: newsletter
+lang: en
+---
+This week's newsletter relays a security announcement for LN
+implementations and notes a few changes in popular Bitcoin
+Infrastructure projects.
+
+{% comment %}<!-- include references.md below the fold but above any Jekyll/Liquid variables-->{% endcomment %}
+{% include references.md %}
+
+## Action items
+
+- **Upgrade LN implementations:** one or more issues that are scheduled
+  to be disclosed at the end of this month affect older LN
+  implementations.  If you are using any of the following software
+  versions, upgrading to a more recent version is [strongly
+  recommended:][cve ln]
+
+    - C-Lightning < 0.7.1
+    - LND < 0.7
+    - Eclair <= 0.3
+
+## News
+
+*None this week besides the above LN security announcement.  Instead,
+we extend our best wishes for safe travels and informative presentations
+at Scaling Bitcoin Tel Aviv next week.*
+
+## Notable code and documentation changes
+
+*Notable changes this week in [Bitcoin Core][bitcoin core repo],
+[LND][lnd repo], [C-Lightning][c-lightning repo], [Eclair][eclair repo],
+[libsecp256k1][libsecp256k1 repo], [Bitcoin Improvement Proposals
+(BIPs)][bips repo], and [Lightning BOLTs][bolts repo].*
+
+- [C-Lightning #3002][] makes several small changes to comply with
+  recent updates to the [LN specification][BOLTs], including the
+  [BOLT4][] update to remove the `final_expiry_too_soon` error message
+  as described in [last week's newsletter][bolts608].
+
+- [Eclair #899][] implements extended queries as proposed in [BOLTs
+  #557][], allowing an LN node to only request gossip updates that
+  arrived after a certain time or which have a different checksum than
+  those the node has already seen.
+
+- [Eclair #954][] adds a sync whitelist.  If empty, the node will sync
+  its gossip store with any peer. If not empty, the node will only sync
+  with the specified peers.
+
+{% include linkers/issues.md issues="3002,899,557,954" %}
+
+[cve ln]: https://lists.linuxfoundation.org/pipermail/lightning-dev/2019-August/002130.html
+[bolts608]: /en/newsletters/2019/08/28/#bolts-608
+[bolts]: https://github.com/lightningnetwork/lightning-rfc/