Stellar: Stellar-core v12.0.0 release
Biweekly update 20th September — 4th October
It’s a big week for Stellar releases: there are new versions of both Stellar-core and Horizon. Stellar-core v12.0.0 implements three Core Advancement Proposals. CAP-24 allows a form of path payment with a strict equality constraint on the send amount and an inequality constraint on the destination amount. CAP-25 simplifies the bucket list data structure in stellar-core, which makes things easier for node administrators by reducing storage cost and bucket merge latency. CAP-26 disables the current inflation mechanism. Plus Horizon v0.21.0 adds more filtering options for pathfinding and continues to roll out features related to the new experimental ingestion system. More to follow!
Application of the Week
Updates to Stellar Protocol (CAPs) and Ecosystem (SEPs)
Core Advancement Proposals (CAP) and Stellar Ecosystem Proposals (SEP) are a formal way of documenting proposed standards to improve various aspects of the Stellar Network. These functions similar to EIPs and BIPs from the Ethereum and Bitcoin communities respectively. CAPs and SEPs represent the culmination of many discussions that often take place on the Stellar Developer Google Group.
CAP-0026 [Draft]: In this CAP, OrbitLens proposes disabling the current inflation mechanism, and argues that users’ increasing tendency to join inflation pools prevents inflation from supporting important ecosystem projects. Furthermore, he claims, these large weekly payment distributions may cause more unforeseen complexities than benefits, causing edge cases to arise in smart contracts and an unnecessary burden on validating nodes.
As of this week, CAP-0026’s design for disabling inflation became much simpler. Instead of OrbitLens’ somewhat more complex first approach, the CAP now details simply deprecating the inflation operation, by returning a OpNotSupported message from core nodes.
All-in-all, two pull requests were merged in the last week.
Updates to Stellar Core
This week the core team was rocking and rolling, inching closer to the 0.12.0 finish line. First off, 0.12.0rc2 was released. This release candidate comes with release notes (not present in the release candidate from last week).
Most of what was merged this week includes small nits, big fixes, and documentation/comment improvements. My personal favorite from this week was PR #2027 by graydon. This PR added a substantial comment about offers and the order book, especially helpful because, as someone who has done a little bit of work there, this code is tough. Furthermore, for those who are less familiar with the core codebase, gems like this are actually quite frequent, helping newcomers (and old comers alike) grok what exactly is going on!
Overall, eight pull requests were merged in the last week.
- transactions: add big comment about offers and the order book.
- docs: document the “critical” field in quorum and info endpoints.
- work: add and tidy some comments.
- Tests: ensure buckets are released from publish queue
- Use all bucket hashes from HAS instead of relying on StateSnapshot fo…
- Fix windows build
- Bug 2255 hanging test bucketmanager reattach has from publish queue
- Overlay logging improvement
Calls for Participation
Looking to get your hands dirty and not sure where to begin? The Stellar ecosystem is full of open source projects looking for help. The following projects are interested in some help and are very likely willing to offer mentorship in exchange:
Stellar Vanity Wallet Generator (Rust): generate Stellar vanity wallets
- Make Key Generation Asynchronous
- Implement johansten’s Suggested Improvements
- FetchTimebounds Bug
scala-stellar-sdk (Scala): Scala Sdk for the Stellar network
astrocore (Rust): Stellar-core implementation in rust
State of the Developer Ecosystem
Besides the Stellar-core release candidate discussed above, also a first release candidate for Horizon 0.21.0 and two SDK updates, Python and Qt took place.
Horizon 0.21.0 (remember this is a release candidate and not production read) brings a lot of new cool features:
- support for CAP-0024 (PathPayment2)
- experimental support for an offers endpoint
- numerous fixes for the new experimental ingestion system
- dropped support for go 1.10 and 1.11
Below are quick synopses of this week’s SDK updates:
- Python: in what may be seen as a classic Python move, there are now two officially developed and supported versions of this SDK, the 1.x.x branch and the 2.x.x branch. This week saw the release of 1.3.2, which brings SEP-0010 support.
- Qt: for its first update since July, version 0.1.9.1 brings SEP-0010 support as well. Awesome! I believe this means most of the major SDKs now are SEP-0010 compliant.
- New releases: Stellar-core v12.0.0 + Horizon v0.21.0
CAP-24 creates a new operation called PATH_PAYMENT_STRICT_SEND. Right now, path payments only let you specify how much a recipient will receive. PATH_PAYMENT_STRICT_SEND lets you specify how much you want to send.
Technically, it “allows a form of path payment with a strict equality constraint on the send amount and an inequality constraint on the destination amount.” Intuitively, that means that if you’re sending USD to Lisa, and you want her to receive Euros, you can do things the original way and say “I want Lisa to receive €8,” or you can do things the new way and say, “I want to send Lisa $10.”
CAP-25 simplifies the bucket list data structure in stellar-core, which makes things easier for node administrators by reducing storage cost and bucket merge latency.
CAP-26 disables the current inflation mechanism.
Stellar-core v12 is available today, but like all protocol upgrades, it won’t take effect until validators vote to update the network. That vote is scheduled for Monday, 10/28 at 1600 UTC, so you have about a month to prepare.
In addition to some performance improvements and bug fixes, Horizon v0.21.0 adds more filtering options for pathfinding, and continues to roll out features related to the new experimental ingestion system by adding support for /offers.
If you want to play around with the new ingestion system, it’s open for beta testing.
Note: Protocol 12 will be fully supported in Horizon v22, targeted for release on October 21st.
Meridian is an opportunity to discuss big-picture questions around financial inclusion, efficiency, and innovation. Where are the greatest applications for Stellar in our financial present? What roles will Stellar have in our financial future? How are different countries approaching regulation and compliance? Where can Stellar make the most impact? What can we all do to make building on Stellar easier and more rewarding?
In Mexico City these topics wll be covered, and will be providing opportunities for the Stellar community to meet their counterparts from around the world.
Date And Time
Mon, Nov 4, 2019, 9:00 AM –Tue, Nov 5, 2019, 6:00 PM CST
Proyecto Público Prim
30 Calle General Prim
Colonia Juárez, CMX 06600
Stellar has just released Horizon v0.20.1, which deploys a completely new ingestion system to enable some experimental features.
In Q3 2019 Stellar will be working on moving all the Horizon features to the new system. It will also publish documentation for the new ingestion package that can be used to build custom, advanced apps, and services without Horizon.
Partnerships and team members
Social media metrics
The chart above illustrates a slight decline in the number of Telegram followers. In general, Stellar experiences the average level of social activity.
The graph above illustrates a slight increase in the number of Reddit subscribers and Twitter followers. However, Twitter followers prevail. The information is taken from Coingecko.com