This week’s newsletter references a discussion about BIP151 encryption
for the peer-to-peer network protocol, provides an update on
compatibility between Bitcoin and the W3C Web Payments draft
specification, and briefly describes some notable merges in popular
Bitcoin infrastructure projects.
Allocate time to test Bitcoin Core 0.17RC3: Bitcoin Core has
uploaded binaries for 0.17 Release Candidate (RC) 3.
Testing is greatly appreciated and can help ensure the quality of the
Plans for the second Optech workshop are progressing,
with date and location confirmed for Paris on November 12th/13th. The
tentative list of topics is:
Replace-by-fee vs. child-pays-for-parent as fee replacement techniques
Partially Signed Bitcoin Transactions (BIP 174)
Output script descriptors for wallet interoperability (gist)
Lightning wallet integration and applications for exchanges
Approaches to coin selection & consolidation
Member companies who would like to send engineers to the workshop should
BIP151 discussion: as mentioned in Newsletter #10,
Jonas Schnelli has proposed an updated draft of
BIP151 encryption for the peer-to-peer network protocol.
Cryptographer Tim Ruffing provided constructive criticism of the draft on the Bitcoin-Dev mailing list this week that
received also-constructive rebuttals from Schnelli and Gregory
Maxwell. These posts may be interesting reads for anyone wondering
why certain cryptographic choices were made in the protocol, such as
the use of the NewHope quantum-computing resistant key exchange.
W3C Web Payments Working Group update: Lightning Network developer
Christian Decker is a member of this group attempting to create
standards for web-based payments. In a reply sent to
the Lightning-Dev mailing list, Decker explains why he thinks the
current draft specification will be fundamentally compatible with both
payments to Bitcoin addresses and Lightning Network payments. The
draft even explicitly allocates the XBT currency code to Bitcoin.
Notable commits this week in Bitcoin Core, LND, and C-lightning. Reminder: new merges to
Bitcoin Core are made to its master development branch and are unlikely
to become part of the upcoming 0.17 release—you’ll probably have to
wait until version 0.18 in about six months from now.
Bitcoin Core #12775 adds support for RapidCheck (a QuickCheck
reimplementation) to Bitcoin Core, providing a property-based testing suite
that generates its own tests based on what programmers tell it are the
properties of a function (e.g. what it accepts as input and returns
Bitcoin Core #12490 removes the signrawtransaction RPC from the
master development branch. This RPC is labeled as deprecated in the
upcoming 0.17 release and users are encouraged to use the
signrawtransactionwithkey RPC when they are providing their own
private key for signing or the signrawtransactionwithwallet RPC when
they want the built-in wallet to automatically provide the private key.
LND made almost 30 merges in the past week, many of which made
small enhancements or bugfixes to its autopilot facility—its ability
to allow users to choose to automatically open new channels with
automatically-selected peers. Several merges also updated which
versions of libraries LND depends upon.
C-Lightning added several hundred lines of documentation to its
repository this week, most of it inline code documentation or updates
to files in its /doc directory.