Lately it's been a lot of digging into syscalls, chasing down perf edges, and smoothing dev tools. Some notes from the past sprint: - CKB-VM: syscall tracer improvements - CKB-CLI: dep_group deployment now works with Type ID - Ledger app: added support for the "other" address type - Syscall behavior adjusted for fuzzing/debugger use Next release is shaping up. 🚀 Details here:

GitHub

CKB Dev Log 2025-08-20 · nervosnetwork/ckb · Discussion #4939

Updates Improvements CKB-VM Syscall Enhancements & Performance Optimization Implemented load data as code in syscall tracer: nervosnetwork/ckb-vm-c...

Dev updates from #TeamCKB Last sprint, we: - added a new crate: CKB syscall tracer - released new versions of CKB-STD and Molecule - worked with community devs to design CKB-UDT convert service for smoother UDT payments Nothing beats building with the community. Thanks for helping us level up! 🫡 Full log:

GitHub

CKB Dev Log 2025-08-06 · nervosnetwork/ckb · Discussion #4935

Updates Features New CKB Syscall Tracer Added a new crate CKB syscall tracer: nervosnetwork/ckb-vm-contrib#21 Integrated in ckb-debugger https://gi...

#TeamCKB dev updates In the last sprint, besides getting Meepo live on mainnet, we've also: - Released ckb-light-client v0.5.1 - Improved CKB repo CI workflows - Upgraded CKB standalone debugger for smoother integration with the new syscall Spawn Check out the details:

GitHub

CKB Dev Log 2025-07-09 · nervosnetwork/ckb · Discussion #4926

Updates Features & Release Meepo Hard fork successfully deployed. View on Explorer: https://explorer.nervos.org/hardfork Released ckb-light-client ...

#TeamCKB Dev updates During the last sprint, new versions of several key CKB components were released: ✔️ CKB v0.202.0 -- Hole punching protocol improves NAT traversal and makes more nodes publicly reachable ✔️ Light Client v0.5.0 -- adds important checks — transactions now require a minimum fee rate to be accepted, and DAO script size is verified to ensure safety ✔️ P2P network Tentacle v0.7.1 -- improves connection reliability and security Plus, proxy and onion support for ckb-network is also in active testing. Full log:

GitHub

CKB Dev Log 2025-06-25 · nervosnetwork/ckb · Discussion #4916

Releases & Features CKB v0.202.0 released 🚀 This release introduces a hole punching protocol to improve NAT traversal issues. With this, more no...

We've made it easier to run a node with clearer, updated docs v2.21.0 ✨ - Added new articles: a. Overview

Overview | Nervos CKB

Introduction

b. Node Configuration

Node Configuration | Nervos CKB

Introduction

c. Sync Options

Sync Options | Nervos CKB

When running a CKB full node, there are multiple ways to sync blockchain data to your local machine. Each method offers trade-offs between trust, p...

- Reworked node setup docs for clarity (mainnet/testnet/devnet, light clients, public RPCs, etc.) - Moved RPCs to the DApp section where they make more sense: https://docs.nervos.org/docs/dapp/rpcs Release note:

GitHub

Release v2.21.0 · nervosnetwork/docs.nervos.org

New Content feat: update node related articles by @yfeng2824 in #585 Fixes fix: enhance sidebar scroll restoration and active Item handling by @...

#TeamCKB Dev updates Last sprint, we wrapped up a multisig upgrade along with tooling updates. It’s all about improving compatibility between multisig scripts and NervosDAO withdrawals. - If you’re using multisig, upgrade now to stay safe and compatible. - If you're using NervosDAO with a single-signature address, you won’t be directly affected—but we still recommend upgrading for better stability. Also, DID PLC Registry is now available on CKB. Originally developed by Bluesky, now bridging CKB with the web5 decentralized social network. Full dev log:

GitHub

CKB Dev Log 2025-06-11 · nervosnetwork/ckb · Discussion #4904

Updates Features Multisig v2 is now supported across SDKs and CLI: Rust SDK v.4.0.0 (WASM support included): https://github.com/nervosnetwork/ckb-s...

⚠️ If you're using NervosDAO with multisig, this upgrade is especially for you! We've fixed a rare edge case in the multisig script, where unlocking could fail under specific conditions — especially when no since value was provided. (Details: https://github.com/nervosnetwork/ckb-system-scripts/pull/98, https://github.com/nervosnetwork/ckb-system-scripts/pull/99) If you're using older SDK, upgrade NOW—old versions may NOT be compatible and could cause unexpected behavior. This update improves compatibility between multisig scripts and DAO withdrawals. ✅ What’s fixed: - Contract logic now properly handles since conditions - Added new test coverage - All major tools updated for compatibility: CCC SDK:

GitHub

feat: add support for multisig script v2 by Hanssen0 · Pull Request #197 · ckb-devrel/ccc

#196

CKB SDK Rust:

GitHub

[BREAKING CHANGE] Add `MultisigVersion::Legacy` and `MultisigVersion::V2` by eval-exec · Pull Request #140 · nervosnetwork/ckb-sdk-rust

This PR want: add MultisigScript enum to ckb-sdk: #[derive(Debug, Clone, Copy, PartialEq, Eq)] pub enum MultisigScript { /// Multisig Script ...

CKB SDK Go:

GitHub

[BREAKING CHANGE] Add `MultisigVersion` `Legacy` and `V2` by eval-exec · Pull Request #233 · nervosnetwork/ckb-sdk-go

This PR add systemscript.MultisigVersion param to func NewSecp256k1Blake160MultisigAllScriptHandler. Before: func NewSecp256k1Blake160MultisigAllSc...

CKB SDK Java:

GitHub

[BREAKING CHANGE] Add `MultisigVersion` `Legacy` and `V2` by eval-exec · Pull Request #695 · nervosnetwork/ckb-sdk-java

This PR add MultisigVersion to ckb-sdk-java: before Secp256k1Blake160MultisigAllScriptHandler handler = Secp256k1Blake160MultisigAllScriptHandler()...

CKB CLI:

GitHub

[Breaking Change] Add `--multisig-code-hash` flag to specify `MultisigScript::V2` or `MultisigScript::Legacy` by eval-exec · Pull Request #631 · nervosnetwork/ckb-cli

Upgrade ckb-sdk-rust dep: [BREAKING CHANGE] Add MultisigVersion::Legacy and MultisigVersion::V2  ckb-sdk-rust#140 Add lock-code-hash field to mul...

CKB Explorer:

GitHub

Update multisig contract info · Issue #844 · Magickbase/ckb-explorer-public-issues

Is your feature request related to a problem? Please describe. A new version of multisig has been deployed on the mainnet and testnet. Describe the...

Thanks for rolling with us! 🫡

We’re sharing how we debug flaky tests in CKB. 🕷️ You probably won’t hit this as a dApp builder— but it’s the kind of work that keeps the infra solid. So you can just build without worrying. 🔗 https://yakihonne.com/naddr1qvzqqqr4gupzq046tm6pkgrtr4y73vd7wfqa06k4mkrmwdexrknycw7quf637gawqq242snhd934yu342gexk7jgfe2nw32tx4v82fl34w4

📦 Just built something I think you'll like: CKB-JS-VM. Now you can write on-chain scripts in JavaScript or TypeScript. It's powered by QuickJS, a lightweight JS engine, fully integrated into CKB-VM. You get to use one language for both development and testing, plus take advantage of the whole JS/TS ecosystem. 📕Here’s a little guide with tutorials if you want to dive in:

GitHub

ckb-js-vm/docs/tutorial at main · nervosnetwork/ckb-js-vm

Write on-chain scripts in TypeScript on CKB-VM. Contribute to nervosnetwork/ckb-js-vm development by creating an account on GitHub.

Dev log time — here’s what’s fresh on CKB 🛠️ - Offckb v0.3.5 released: one-click scaffolding for JS contracts & dApps:

GitHub

Release v0.3.5 · ckb-devrel/offckb

Feat feat(template): add js-script-next-js template by @RetricSu in #231 feat(create): add create dapp only by @RetricSu in #232 Fixes fix(build...

- CKB debugger now supports WASM - New multisig live on mainnet, boosting interoperability - Contract development in Rust docs revamped: https://nervos-ckb-docs-git-fork-joii2020-v2dev-cryptape.vercel.app/docs/script/rust/rust-quick-start Next up: multisig upgrades, Nostr + light client demo, and outbound block relay inspired by Bitcoin ⚡️ Full log:

GitHub

CKB Dev Log 2025-04-30 · nervosnetwork/ckb · Discussion #4882

Updates Release & Features Released offckb v0.3.5, one-click scaffolding for JS contracts and dApps: https://github.com/ckb-devrel/offckb/releases/...

Dev updates are in! - WASM support for Ractor (WIP) - ckb-script-ipc now in TypeScript - New ipc_call RPC interface - NAT traversal demo (TCP/UDP) Plus major refactors & fixes across CKB VM, Tentacle, and Rust SDK. Details:

GitHub

CKB Dev Log 2025-04-02 · nervosnetwork/ckb · Discussion #4864

Updates Features WASM support for Rust actor framework Ractor (WIP): https://github.com/Officeyutong/ractor/tree/support-for-wasm-in-browser TypeSc...

Our Nervos Docs just got a little boost. 🔌 Updates in v2.18.0: - New essay on simplifying IPC with Spawn: https://docs.nervos.org/docs/script/ckb-script-ipc - How to run a light client node:

Run a Light Client Node | Nervos CKB

Why Light Client?

Also a few fixes and tweaks to keep things running smooth. Catch the full changelog:

GitHub

Release v2.18.0 · nervosnetwork/docs.nervos.org

New Content docs: add essay introducing ckb-script-ipc by @linnnsss in #554 docs: update meepo hardfork info by @linnnsss in #553 feat(nodes): add...

Time for a quick dev log update! 🚀 Improvements: - Rust 2024 edition upgrade for CKB-related packages - Customizable syscall generator for more flexible environments - `create-ckb-js-vm-app`: CLI for quick CKB Script bootstrapping - Enhanced CKB standalone debugger with new resources: - Tutorial for ckb-js-vm: A complete guide for writing on-chain Scripts in TypeScript - New RFC for standardizing hardfork naming conventions Details:

GitHub

CKB Dev Log 2025-03-19 · nervosnetwork/ckb · Discussion #4855

Updates Release ckb-debugger: Added macOS (x64) and linux (arm64) releases for ckb-debugger 0.200.0 Features & Resources New RFC for standardizing ...

#NERVOS #CKB #UTXO #WEB5

Our doc site keeps getting better—thanks to all the feedback and contributions from the community! 💡✨ Here’s what’s new: - Navbar restructured for smoother navigation (separate categories for Nodes & Mining, Ecosystem, History, Resources) - Wallet integration & ecosystem docs updated:

Wallet Connector(CCC) | Nervos CKB

Common Chains Connector (CCC) is a new wallet connectivity library developed in Typescript Lang, designed to make it easier for developers to help ...

- Tools version in Meepo hardfork updated:

CKB Hard Fork History | Nervos CKB

This page contains a timeline of all the hard forks, and updates to the Nervos CKB.

- Simple-lock issue fixed For more details, check out the release note:

GitHub

Release v2.16.0 · nervosnetwork/docs.nervos.org

Content feat: add fiber network to ecosystem by @yfeng2824 in #529 docs: update wallet integration and ecosystem content by @yixyxiu in #534 updat...

Always happy to see great questions from the community! If you're also wondering: - Whether the JS-based script testing framework in CCC could become the standard for CKB smart contract testing - How CKB approaches quantum-resistant lock scripts and what the future holds Our devs jumped in with insights—check it out here:

GitHub

CKB Dev Log 2025-03-05 · nervosnetwork/ckb · Discussion #4829

Updates Features CKB Released CKB 0.200.0 https://github.com/nervosnetwork/ckb/releases with Meepo hardfork time scheduled Released ckb-debugger: h...

#TeamCKB Dev updates: Wrapping up this round of dev work with some solid progress: Fiber @FiberDevs hit mainnet, and Meepo hardfork now has a set time. ☕️ Other chores (you know, the usual) can be found in the latest dev log:

GitHub

CKB Dev Log 2025-03-05 · nervosnetwork/ckb · Discussion #4829

Updates Features CKB Released CKB 0.200.0 https://github.com/nervosnetwork/ckb/releases with Meepo hardfork time scheduled Released ckb-debugger: h...

Track the countdown to the Meepo hardfork here: https://explorer.nervos.org/hardfork ⏳

Nervos Docs just got some refinements! ✨ v2.15.0 is live with: New content - CCC Molecule: JavaScript SDK w/ an all-in-one module to serialize and deserialize data in Molecule format:

JavaScript SDK with Molecule | Nervos CKB

When working with your dApp development,

Fixes - Resolved issues in the SUDT contract Special shoutout to community member u2 for catching the issue! 👏 Release note:

GitHub

Release v2.15.0 · nervosnetwork/docs.nervos.org

New Content Add ccc moleculec by @RetricSu in #521 Fixes fix sdut contract by @u2 in #520 docs: improve language accuracy of sudt script tutoria...

#TeamCKB Dev Update: 🦾 CKB - ckb-java-sdk 3.0.1 released - New ckb-js-std library for easier script development - Improved multisig support on testnet & mainnet - Debugger now provides clearer error messages ⚡️ Fiber Network - Multi-hop routing for smoother cross-chain payments - Payment/invoice subscription implemented to update orders Details:

GitHub

CKB Dev Log 2025-02-19 · nervosnetwork/ckb · Discussion #4809

Updates Features CKB Released and published ckb-java-sdk 3.0.1 to Maven: https://central.sonatype.com/artifact/org.nervos.ckb/ckb Implemented ckb-j...

📣 CKB's 2nd Hard Fork Meepo is now live on testnet! This upgrade highlights the powerful Spawn syscall, enabling scripts to call child scripts within the same execution context—much like the POSIX spawn. Spawn empowers developers to build complex dependencies and smart contract libraries, advancing DApp sophistication on CKB. (Learn more about Spawn: github.com/nervosnetwork/rfcs/blob/master/rfcs/0050-vm-syscalls-3/0050-vm-syscalls-3.md#spawn) It also adds "data2", a new JSON representation matched by data hash. Stay tuned as we get closer to mainnet! ⚠️ To join the CKB testnet, use CKB binary v0.119 or above: github.com/nervosnetwork/ckb/releases/tag/v0.119.0