DevHub 2.0 + LocalNet for Builders

DevHub 2.0 is live for Canton builders, bringing developer resources and tooling into one place.

Builders can explore docs, MCP resources, partner SDKs and APIs, WalletConnect resources, DPM, LocalNet tools, and more across the Canton developer stack.

The updated developer experience also includes AI-powered workflows, helping builders move faster when exploring docs, asking questions, and working through the Canton development flow.

LocalNet for Canton Builders

Builders also have an easier way to work with Canton LocalNet through the Canton Builder Tool.

It helps developers run a full Canton LocalNet locally, including validators, a synchronizer, wallet UIs, Canton Coin, Scan UI, and the official Splice LocalNet stack.

If you are building, testing, or experimenting locally, these are strong resources to start with.

Explore DevHub 2.0:
https://dev-hub.canton.foundation/
Explore the Canton Builder Tool:
https://canton-network-devs.github.io/Canton-Builder-Tool/ @Dev Announcements @Canton Builder

Apply to Become a Featured App

Featured App status on Canton is not limited to large institutions.

Per the Canton Foundation process, any application that is within two weeks of production can begin the request.

Applications are reviewed by the Tokenomics Committee, and applicants may be asked to join a live call to demo the app directly to the committee.

If you are close to shipping, this is the process to follow.

Apply here:
https://canton.foundation/featured-app-request/
@Dev Announcements @Announcements

Visa Joins the Canton Foundation

The Canton Foundation welcomes Visa as a General Member.

Visa previously became a Super Validator under CIP-0109, bringing one of the world’s largest payment networks into the governance of infrastructure built for privacy-preserving, institutional-grade settlement.

Their participation now extends further as Visa joins the Foundation itself.

A major name in global electronic payments, now even more deeply involved in where finance is moving. @Canton Users

gCanton @Canton Builder

If you're building on Canton with AI / LLMs for Vibe Coding, Agentic Workflows, or just asking Claude to help with Daml. You've most probably hit the wall where Claude writes plausible-looking contracts that fail at runtime with multiple authorization errors or uses daml build instead of dpm or doesn't know Token Standard exists.

We built a fix:

🛠️ CF Daml Skill for Claude Code:
A Claude skill built specifically for Canton Builders, Install it once and Claude automatically knows:

• Daml authorization model: traces who needs to sign what and whether the parent transaction actually covers it

• Canonical Canton patterns trained from working code: Propose-Accept, Delegation, Sharded Hot-Singleton, DvP settlement, Token Standard allocation flows, and more

• Code review mode: paste a template, get a structured checklist back covering signatories, choices, authorization chain, test coverage

One command to install: npx @canton-network-devs/cf-daml-skill

Detects Claude Desktop automatically and installs directly. No manual file hunting.

Try it with:

→ "Review this Daml template for authorization errors"
→ "What pattern should I use for a regulated asset transfer?"
→ "Write a DvP workflow with a regulator observer"
→ "Why is my choice failing authorization?"

Open source on GitHub & PRs Welcome, if you've hit a pattern that's missing, add it.

🔗 Info: CF Daml Skill/README

🔗 Dev Hub Listed: dev-hub.canton.foundation

New Developer Video

A new Canton developer video is now live: Vibe Coding on Canton with CF Claude MCP + Daml Skill.

This walkthrough is for builders interested in using Claude MCP and the Daml Skill to speed up development and explore a smoother workflow for building on Canton.

If you are experimenting with Canton development, AI-assisted coding, or Daml, this is one to check out.

Watch here:
https://youtu.be/cVmtWkDiYas?si=Hm6iKcOujEdWeyhz
@Dev Announcements @Canton Builder @Announcements

Canton Dev Hub is here

Builders, this one is for you.

The Canton Dev Hub is the official Canton Foundation-curated home for developer tooling across the Canton Network.

It brings together the resources builders need to move faster, including:
- Developer docs
- MCP resources
- Partner SDKs and APIs
- Tooling across the Canton ecosystem
- More resources for building, integrating, and exploring Canton

Whether you are just getting started or already building, the Dev Hub is designed to help you find the right tools without digging through scattered links.

Start building here :
https://dev-hub.canton.foundation/
@Canton Builder @Announcements @Dev Announcements

Developer Tutorial: Canton dApp SDK & CIP-103

A new developer tutorial is available covering the Canton dApp SDK and CIP-103.

This session gives builders a closer look at the tooling available for creating Canton dApps and how the SDK helps simplify development for teams building on the network.

For developers who already understand the basics and want to start moving toward real application workflows, this is a strong next step.

Good for:
- Developers building Canton dApps
- Teams exploring the Canton dApp SDK
- Builders looking to understand CIP-103 and app integration patterns

Watch here:
https://youtu.be/klDGn42NiGg?si=Zr3NmoKVbY3ntloV

Developer Tutorial: WalletConnect in a Canton dApp

The Canton developer playlist includes a tutorial on integrating WalletConnect into a Canton dApp.

This video walks through how wallet connection can work in a Canton application, including the user flow and how builders can start connecting front-end experiences to Canton-based functionality.

If you are building user-facing apps, this is a helpful look at how wallet connectivity can fit into the Canton developer experience.

Good for:
- dApp builders
- Wallet and UX teams
- Developers working on user onboarding and app connectivity

Watch here:
https://youtu.be/Ee5-_DimoEs?si=YSMWTxxu42FdqJ1Z

Developer Tutorial: Your First Daml Contract

New to building on Canton? Start with the fundamentals.

This tutorial walks through how to write your first Daml contract, helping developers understand the core language used to model application logic on Canton.

If you are coming from other smart contract environments, this is a useful first step for understanding how Canton approaches application development, privacy, and workflows differently.

Good for:
- Developers new to Daml
- Builders exploring Canton for the first time
- Teams starting to understand Canton application design

Watch here:
https://youtu.be/-AWep7dLSXo?si=3_TGkgAWzjq794zD

Developer Tutorial: Your First Daml Contract

New to building on Canton? Start with the fundamentals.

This tutorial walks through how to write your first Daml contract, helping developers understand the core language used to model application logic on Canton.

If you are coming from other smart contract environments, this is a useful first step for understanding how Canton approaches application development, privacy, and workflows differently.

Good for:
- Developers new to Daml
- Builders exploring Canton for the first time
- Teams starting to understand Canton application design

Watch here:
https://youtube.com/playlist?list=PLKh1lkOi-bco&si=2_I8iUrCHlTLbO82

Build on Canton: Developer Tutorials

The Canton YouTube channel now has a growing developer playlist for anyone looking to build on Canton.

These tutorials are a strong starting point for developers who want to understand the Canton stack, learn how Daml fits into the network, and start building real Canton dApps.

Current videos

• Your First Daml Contract: Learn the basics of writing a Daml contract and getting started with Canton development.
• WalletConnect in a Canton dApp: Walk through how WalletConnect can be integrated into a Canton dApp.
• Canton dApp SDK & CIP-103: Explore how the Canton dApp SDK helps builders create applications on Canton.

More developer videos are coming soon, so keep an eye on the channel.

Watch the developer playlist here and subscribe while youre at it:
https://youtube.com/playlist?list=PLKh1lkOi-bco&si=2_I8iUrCHlTLbO82
@Dev Announcements @Canton Builder @Announcements

gCanton @Canton Builder **
Canton MCP Plugin** is Now Upgraded and Way Easier to Install.

No more git cloning or editing JSON config files manually.

One command and you're done:

npx @canton-network-devs/canton-mcp-server install

Restart Claude Desktop and Canton MCP appear automatically. That's it.

What's new?

• One-command installer, works on Mac, Windows, Linux
• New Updated knowledge base now covers the New Unified docs.canton.network
• Old deprecated LocalNet info gone and better deprecation warnings for Claude and ChatGPT (Including Mythos too, when available)

NOTE: Repo now lives at the official Canton Network Devs GitHub:
🔗 https://github.com/canton-network-devs/Build-on-Canton-MCP

Already using the MCP? No action Needed.
This doesn't change anything for existing users, your Claude Desktop config keeps working as-is. The new installer is just for new users to skip the manual setup. The repo move won't break anything either.

Next Release will make our MCP Plugin support for Claude.ai web too...

Some Maintenance will be there to fix some stale links issues in MCP this weekend, will be up and running by Monday onwards, this is an effort to update MCP with transition to the NEW AND UNIFIED BETTER DOCS at docs.canton.network

Canton 3.4 to Canton 3.5 Transition

Please review the latest update for the Canton 3.4 to Canton 3.5 transition.

Update date: 2026-06-12
Full details are available in the long-term SV Operations schedule.

Current Status

Phase 1: Complete
Phase 2: Complete

Phase 3: Global Synchronizer Upgrade to Protocol 35

All three Global Synchronizer networks will perform a Logical Synchronizer Upgrade (LSU) to Canton Protocol Version 35.

Minimum Splice version for validators: Splice 0.6.5

DevNet

Status: Complete

TestNet

Topology Freeze: 2026-06-16 at 13:00 UTC
Upgrade: 2026-06-17 at 13:00 UTC

MainNet

Topology Freeze: 2026-06-26 at 13:00 UTC
Upgrade: 2026-06-27 at 13:00 UTC

App Provider Impact During LSUs

During Logical Synchronizer Upgrades:
- Party onboarding, package vetting, and other topology transactions will pause for 24 hours before the LSU
- These actions will resume immediately after the LSU completes
- Daml transactions may be delayed for seconds to minutes at the moment of the LSU
- App providers should experience no other impact

Traffic-Based App Rewards

Traffic-based App Rewards are scheduled as follows:

June 30: Daml models from Splice 0.6.7 become effective. All nodes must upgrade to Splice 0.6.7 before this date.
July 7: Dry run of traffic-based app rewards begins on MainNet
July 28: Traffic-based app rewards go live on MainNet

This is tentatively expected to require upgrading validator nodes to Splice 0.6.9, though the final version number is still to be confirmed.

Phase 4: Retiring CometBFT

The Canton team has prepared a new Canton-native BFT ordering service to replace CometBFT.

Tentative LSU dates to adopt CantonBFT are below. All times are 13:00 UTC, with topology freeze set 24 hours earlier.

DevNet LSU: Wednesday, July 8
TestNet LSU: Wednesday, July 22
MainNet LSU: Saturday, August 8
@Dev Announcements @Product Updates

Hey Everyone,
One thing we kept hearing from builders: "I didn't know that existed."

Canton's tooling ecosystem has grown fast: DPM, MCPs, PQS, Wallet SDK, LocalNet Tools, APIs, and a lot more. But with new tools being built every day, and shared across Github repos, Social media, & Discord discussions, discoverability was a real gap.

So we built something to fix that.

👉 Canton Developer Hub: https://dev-hub.canton.foundation/

A Single, Structured, and Open-Source Catalogue of every tool, SDK, API, and piece of infrastructure available for building on Canton. Curated by the Foundation, open to the whole ecosystem.

And if you've built something that isn't listed here yet but should be? Please submit it.
The Hub is open source and accepts community contributions. If you're a builder or partner with tooling others should know about, open a PR.

Our goal is to ensure that no developer on Canton spends time recreating tools that are already available.

Canton 3.4 to Canton 3.5 Transition

Please review the latest update for the Canton 3.4 to Canton 3.5 transition.

Update date: 2026-06-08
Full details are available in the long-term SV Operations schedule.

Phase 1

Complete

Phase 2

Daml models from Splice 0.6.2 take effect on MainNet.

MainNet validators must upgrade before:
2026-06-09

Minimum required version:
Splice 0.6.2

Phase 3

All three Global Synchronizer networks will perform a Logical Synchronizer Upgrade to Canton Protocol Version 35.

Minimum Splice version for validators:
Splice 0.6.5

DevNet

Topology Freeze: 2026-06-09
Upgrade: 2026-06-10

TestNet

Topology Freeze: 2026-06-16
Upgrade: 2026-06-17

MainNet

Topology Freeze: 2026-06-26
Upgrade: 2026-06-27

All Phase 3 events are scheduled for 9:00 AM US Eastern / 13:00 UTC.

App Provider Impact During LSUs

During Logical Synchronizer Upgrades:
- Party onboarding, package vetting, and other topology transactions will pause for 24 hours before the LSU
- These actions will resume immediately after the LSU completes
- Daml transactions may be delayed for seconds to minutes at the moment of the LSU
- App providers should experience no other impact

Also Coming in Phase 3

Traffic-based App Rewards are currently expected to go live on MainNet at the end of July.

Based on the current plan, this will require validator nodes to upgrade to Splice 0.6.11.

Important Dates

July 1: Dry run of traffic-based app rewards goes live on MainNet
TBD July: MainNet switches to traffic-based app rewards, with the final date depending on production trading dry run schedules during July @Dev Announcements @Product Updates

Developer Action Required: Minimum Splice Version

Validators and Featured App operators must upgrade MainNet Validator nodes to at least Splice 0.6.2 by Monday, June 8.

This upgrade is required for the upcoming Logical Synchronizer Upgrades across DevNet, TestNet, and MainNet.

If a Featured App is hosted on a node running Splice 0.6.1 or below, Featured App processing will fail once the Daml models from Splice 0.6.2 go into effect on Tuesday, June 9.

Recommended Action

Please upgrade to Splice 0.6.2 or later as soon as possible.

The Super Validators strongly recommend upgrading weekly and staying aligned with the version currently operated by the SVs.

Operations Schedule

The full SV Operations schedule, including minimum Splice versions by week, is available here:
https://docs.google.com/document/d/1QhLL5bL0u8temBL86y957VbWDtZJhH9udH-_C7nBlvc/edit?tab=t.0#bookmark=id.sxxekxml0ial

A new web-native calendar is also available for Super Validator and Validator operations on the Global Synchronizer:
https://sv-cal.canton.foundation/

You can also add the Google Calendar here:
https://calendar.google.com/calendar/u/0?cid=Y180N2U3NDhhYjAyOTE2NWNkZWM0OTg2ZTc3YTAwZjAzOTU0NGI5NTA3ZWM5OWE0ZDBhNjU3YjI3ZGNjZjcwYWUyQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20 @Dev Announcements @Product Updates

New Builder Video: Canton Developer Docs Walkthrough

The first video collaboration between the Canton Network and Canton Foundation YouTube channels is now live.

This is the first of several deeper DevRel walkthrough videos for builders and developers, focused on helping teams better understand how to build on Canton.

The video walks through the newly updated Canton developer documentation, including:
- A single entry point for docs
- App development learning paths
- SDKs and tools
- Built-in AI assistant support
- Developer resources for building, testing, and deploying

Watch the full walkthrough:

https://youtu.be/-AWep7dLSXo?si=iRF6Ag29Dca7QHPZ @Dev Announcements @Product Updates

Gate Enables USDCx on Canton Network

Gate has officially enabled USDCx deposits and withdrawals on the Canton Network, giving users another way to move and use USDCx across trading and asset management on the platform.

To support the launch, Gate has also opened multiple Canton ecosystem campaigns, with a combined reward pool valued at $150,000 in CC.

What is included

USDCx Deposit Challenge

Users who deposit USDCx via Canton Network can participate in a rewards campaign focused on stablecoin deposits and ecosystem activity.
https://www.gate.com/announcements/article/51351

CandyDrop

Gate has launched a CandyDrop campaign focused on CC spot trading and first-trade tasks, with additional CC rewards available.
https://www.gate.com/announcements/article/51356

Simple Earn

Gate Simple Earn has launched fixed-term CC products, giving users another way to participate through Gate’s wealth management products.
https://www.gate.com/announcements/article/51357

Official announcement

Read the full Gate announcement here:
https://www.gate.com/announcements/article/51355 @Announcements

CIP-0116 Approved: Featured App Locking

CIP-0116 has been approved, introducing CC locking requirements for Featured App designation on the Canton Network.

The goal is to make Featured App status more objective and market-based, while prioritizing applications that demonstrate committed capital and long-term alignment.

What this means for builders

Featured Apps must now meet clear onchain locking requirements to qualify for and maintain Featured App status.

This helps create a more transparent process for:
- Featured App eligibility
- Application prioritization
- Ongoing alignment with the network
- Governance around Featured App status

Builders and app teams can review the full proposal here:
https://github.com/canton-foundation/cips/blob/main/cip-0116/cip-0116.md @Product Updates