Nervos Community Update: July 2020
From ecosystem integrations to partnership announcements to CKB development updates, July has been packed with exciting updates. While we release network updates on a regular basis, moving forward we’ll bring you a monthly roundup of the latest updates from the Nervos Foundation, our ecosystem and development team, and you — our community.
Below are the monthly highlights and latest updates from Nervos.
Nervos integrates with China’s Blockchain-based Services Network (BSN)
We’re excited to announce our upcoming integration with BSN, China’s Blockchain-based Services Network!
The integration is set to go live on August 10th with the launch of BSN’s new International Portal and will make the Nervos blockchain available to millions of potential users and developers through the International Portal.
Check out the full announcement.
Nervos joins Coinbase’s Rosetta to simplify blockchain integration
While the blockchain space is ripe for innovation, there are some barriers that can slow development. One of the major obstacles for developers is blockchain integration.
That’s why we’re thrilled to announce our new integration with Rosetta, an open source toolkit from Coinbase designed to make blockchain integration simpler and more effective.
Through the integration, Nervos developers will be able to build on Nervos CKB without writing custom parsing, and exchanges will be able to easily access data on blockchains and tokens much faster.
Read the full article.
LeapDAO to Build EVM-Compatible Sidechain Framework
It is with great excitement that we announce LeapDAO will be building an EVM-compatible sidechain framework for Nervos!
With this framework, developers will be able to utilize the breath of existing Ethereum contracts and tooling to build sidechain applications that leverage the underlying security and flexibility of Nervos.
You can read the full announcement.
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Introducing UDTswap: Automated token exchange using multiple liquidity pool economy building on Nervos
UDTswap is an automated exchange protocol using multiple liquidity pool economy on Nervos. UDTswap is a decentralized exchange that replaces order books with an on-chain liquidity pool. Any liquidity pool can be created. In addition, existing automated market maker (AMM) protocols can set a base currency and create a token pair, but there is no limit to the base currency in UDT swap.
Read the full article.
More Ecosystem & Community Content
We read more great content from the community this month. Make sure to share and mention @Nervosnetwork to have your content included in our next roundup!
- Lina says “No!” to Increasing Storage Costs- Dylan Carter
- Nervos sponsors Unitize Hackathon: Hackers Unite at the SF Blockchain Week — Gitcoin
- Nervos x Token Terminal: Interview with Kevin Wang — TokenTerminal
- Nervos — Telegram QUIZ & AMA by GAINS Associates
- Nervos Nation EP: 2 Nervos Nation: Guest Tannr a Nervos Developer
Recent Developer Guides and Resources
- How to use Multisigs with CKB-CLI by Obsidian Systems
- Introducing experimental aarch64 port for CKB by Xuejie
- Smart Contracts in Rust on Nervos — Tannr & Gitcoin Hackathon
- CKB, Version Control and Blockchain Evolution by Jan Xie
Grant & Project Updates
New grant applications keep coining in! Head over to Nervos Talk to check out the latest!
- Obsidian Labs: CKBStudio v0.6.0 is out!
- SECBIT Team: ZKP-toolkit-ckb has reached their grant milestone #1!
- Obsidian Systems: Nervos Ledger App: Status Update #2
- Rebase Team: Synapse browser wallet and keyper agency reached 2nd development milestone!
Community Events
Nervos participated in many events throughout July, both online and offline. Let us know on Twitter @NervosNetwork if you attend an event!
July 5
“Nervos and friends” offline event in Hangzhou, China
July 16
AMA with Nervos co-founder Daniel, who discussed the “road of public chain on DeFi progress” with other blockchain leaders during Math Show hosted by Math Wallet.
July 28
AMA with Nervos cofounder Daniel on the impact of BSN on public blockchains in the Beep community.
July 29
AMA with Nervos cofounder Daniel on DeFi in the 499 Block community.
July 30
AMA with Nervos community manager Williams on the story of Defi in the imToken community.
Nervos CKB Development Update #38
Jun 29 to Jul 12, 2020
TL;DR
- The latest release of ckb is v0.33.1, which fixed a security advisory GHSA-r9rv-9mh8-pxf4.
- We are working to limit ckb memory usage.
- Tentacle now has a Go version.
Status Update
CKB v0.33.1 has been released to address the issue of GHSA-r9rv-9mh8-pxf4. We observed a surge of uncle rate on Jul 1st. It in turn increased the block interval. From a consensus algorithm’s perspective, a large block interval should lower the uncle rate. However, it did not work. The root cause was that a miner did not synchronize the local time, which was about 15 seconds ahead, and there was a bug in the code that would ban peers which relay the block more than 15 seconds in the future. Thus that miner was banned by most peers and could not catch up with the network’s latest block and continuously produced uncle blocks.
We received some complaints that the ckb node consumes too much memory. Xuejie met a similar issue when he tried to port ckb into ARM and ran ckb on his Raspberry Pi which only has 1G memory. So Boyu has started a series of work to confine the memory usage of CKB. He has already achieved some progress, such as not caching all headers in memory during header sync.
Chao had submitted a PR to schedule block download tasks between peers according to the history latency statistics. We are running more simulation tests to find better parameters.
Chao also finished the first version of Tentacle Go. Implementing the framework in another language taught Chao a lot and he started reflecting and refactoring the Rust version.
There are more and more requirements to use ckb as a library. So Quake had made various refactoring to make ckb more friendly to be used this way.
We know that our RPC error messages are not ideal. Ian recently submitted three PRs to improve the RPC error messages.
Nervos CKB Development Update #37
Jun 1 to Jun 28, 2020
Changes in CKB
We have:
- Released CKB v0.33.0.
- Improved chain sync performance. (#2067, #2081)
- Added a new sub-command replay to verify the local chain (#2045)
- Fixed a vulnerability that ckb process crashes on invalid input. (GHSA-pr39–8257-fxc2)
- Added document to explain different protocol handles in tentacle. (ProtocolHandle)
- Supported updating log levels dynamically via RPC (#2113)
- Added RPC truncate to ease testing and development (#2064)
- Removed RPC estimate_fee_rate for performance issue (#2126)
We are:
- Separating code and hot data in database for performance. (#2118)
- Improving RPC errors. (#2038)
- Introducing fail points for test. (#2090)
