Marcello Ardizzone

Staff Protocol Engineer at @0xPolygonLabs

[Polygon | POL @0xPolygon]

The Polygon Chain just got faster. Again.

The Giugliano Upgrade is now live on mainnet, bringing:
• faster txn finality for payments apps (2s reduction)
• higher P2P throughput under load (4x increase)
• onchain gas fee transparency

[Sandeep | CEO, Polygon Foundation (※,※) @sandeepnailwal]

If you’re on Revolut, you’re already on Polygon

Spend your money, stake it, invest it - whatever you choose to do with it, there shouldn’t be any barriers

With zero-fee Polygon payments on Revolut + easy offramping, trading and staking:

• 14M+ crypto users
• across 38 countries
• have already moved $690M+ to date
… and only growing

[smokey @Smokey_]

https://t.co/ntDVQdwepd

[Polygon | POL @0xPolygon]

The future of money movement is on Polygon

and the rails for global payments are already live.

[Marcello Ardizzone @marcell033]

Excited to announce that I’ll be speaking at #Cosmoverse25 in Split on Nov 1st.
I’ll share how Polygon is adopting CometBFT to power cross-chain communication, bringing the Cosmos Stack and EVM worlds closer together 💜

See you there!

[Cosmoverse @CosmoverseHQ]

''CometBFT for Cross-Chain Communication in Polygon''

@marcell033, Staff Protocol Engineer at @0xPolygon, will take the stage at #Cosmoverse25 for a keynote on how Polygon is adopting CometBFT, a core component of the Cosmos Stack, to enhance cross-chain communication.

This keynote highlights how the Cosmos Stack is shaping the future of EVM networks, where modularity and interoperability converge.

[Marcello Ardizzone @marcell033]

Come join us at Cosmoverse 2025 @ Split, Croatia

[Cosmoverse @CosmoverseHQ]

Policy meets Protocol at #Cosmoverse25

The next wave of speakers brings together voices from the European Central Bank, leading policy & legal experts, alongside protocol engineers and developer leaders.

Institutions, law, and infrastructure - shaping the next era of finance.

[Marcello Ardizzone @marcell033]

Live re-genesis for Heimdall v2

[Harry Rook @Harry__Rook]

Now that the dust has settled, I want to take a moment to reflect on last week's Heimdall v2 migration.

Validators were required to import the entire history of Heimdall v1 into an entirely new chain. The previous history had persisted since Polygon’s genesis, and all this had to happen while the chain continued to produce blocks!

Its been said already but this really was the equivalent of open heart surgery.

Heimdal v2 completely revamps the chains consensus engine, updating it from Tendermint to Comet BFT. It also integrates the ABCI v2.0 (a.k.a. ABCI++) module and now allows features such as pre-block validation and vote extensions.

Aside from removing a ton of tech debt, the migration improves state sync between Polygon and Ethereum and reduces finality time to 🚨~5s 🚨.

This monumental effort has taken months of meticulous planning and coordination, not to mention many hours of sacrificed sleep.

Let's all take a moment to congratulate the stellar team and ecosystem of node operators that made this possible. 👏

One of the most sensitive operations during the migration was importing the genesis from Heimdall v1.

With an incorrect history, Heimdal v2 nodes could have been corrupted, and the chain may not have been able to progress past the previous halt height.

For this reason, a checksum of the existing Heimdall v1 state was generated, enabling operators to know that their import was correct.

Here is a clip of this checksum being generated LIVE for the first time by Polygon core devs right before the migration process started.

Enjoy!

[diana chimes @DianaChimes]

Imagine swapping the engine of a $2.5B Formula 1 car…
at 200 mph…
during the race…
without pulling into the pit.

That’s what Polygon just did.

Heimdall v2 is live.
Finality: 2min → 5s

[Marcello Ardizzone @marcell033]

“It's more than just changing the engine of a multibillion-dollar airplane mid-flight, it's like redesigning it in real time while keeping every passenger safe and on course.”

Ok that makes it clear!
Thanks to everyone involved, and shoutout to the best team ever!
Onwards! 💜

[Sandeep | CEO, Polygon Foundation (※,※) @sandeepnailwal]

Product Announcement 🚢 ~5 Second Finality + Modernized Core Infra on Polygon PoS

Polygon PoS engineers have completed deployment of Heimdall v2 to mainnet, upgrading the consensus layer, decreasing large reorgs, and bringing transaction finality to ~5 seconds (down from 1-2 minutes!)

I want to take a moment to recognize the huge achievement of rolling out this upgrade. Heimdall v2 was the most technically complex upgrade the chain has seen since its 2020 launch. And arguably one of the most complicated in all crypto history, second only to the Ethereum Merge.

It's more than just changing the engine of a multibillion-dollar airplane mid-flight, it's like redesigning it in real time while keeping every passenger safe and on course.

There was a huge amount of diligence and coordination across a ton of stakeholders - Polygon internal team, validators, RPC providers, dApps, client developers, and many more.

Running the upgrade required triaging issues across many different entities, fixing problems on the fly, and working around the clock and through the night to minimize impact. Despite the longer timeframe of maintenance, no big reorgs occurred and the migration went successfully. Maintaining decentralization is not just a technical challenge, but a coordination challenge that becomes even more apparent in times like these. Lots of learnings here for us to improve upon our processes and increase visibility.

On behalf of the entire Polygon Labs team, we owe a big thanks to the node operators and providers that coordinated with the migration process! And a big thank you to our community for your patience as we continue to coordinate with remaining apps.

This upgrade is the culmination of years of deep technical work, and represents a huge step forward for Polygon, eradicating massive technical debt and positioning it as one of the most secure, rapid, and innovative chains for onchain payment solutions & RWAs. Faster consensus significantly reduces the chance and depth of reorgs, creating an environment for better UX, superior onboarding, and safer settlement.

A complex release of this size represents a huge bet on the competence of our company to execute. Polygon delivered and we will continue to keep delivering.

It hasn’t even been a month since we launched Polygon’s improved roadmap and the team has already shipped the first steps toward gigagas. In the coming months TPS will increase to 5000, instant finality will come, and Polygon will connect to Agglayer to unleash a new era of aggregated blockchains.

The purple chain is massively scaling and we’re improving it everyday. We're in a zero-to-one mentality mode to ship fast and aggressive for the community.

I’m extremely excited for builders and users to experience the new Polygon! ONWARDS 💜

[Marcello Ardizzone @marcell033]

Undoubtedly the most challenging and rewarding project I’ve led in my career.
Heimdall v2 marks a huge milestone for Polygon PoS, re-architected from the ground up. I’m incredibly proud of the team and honored to be part of Polygon.
Let’s keep shipping. The best is yet to come 💜

[Sandeep | CEO, Polygon Foundation (※,※) @sandeepnailwal]

Shipping Announcement! 🚢

We’ve been on a shipping spree—and next up is Polygon PoS’s consensus layer, Heimdall v2, landing 10 July 2025.

‼️ This is the most technically complex hard-fork Polygon PoS has seen since it's launch in 2020 ‼️

What’s changing?
1. Heimdall sheds all its tech debt from its previous build in 2018-19 era. It jumps from Tendermint + Cosmos-SDK v0.37 → CometBFT + Cosmos-SDK v0.50.
2. Finality drops to ~5 s (no reorgs > 2 blocks). 🚀

Why it matters: faster checkpoints, smoother UX, safer bridging, and head-room for the next wave of upgrades.

Risks & precautions 🛠️
• On 10 July, Heimdall finality will lag by ~3 h during the migration window.
• A large reorg, while unlikely, is still possible—dApps should bump confirmations to 256 blocks for the day.

Node operators, prep now:
• Scripts & runbooks live—migration takes ~30 min on mainnet.
• You’ll need 20 GB RAM and 2× Heimdall disk free.

Read in detail:
https://t.co/ngT1cVwOZR

Let’s make this the smoothest upgrade yet. Most validators have already upgraded but in case you haven't yet, test early, spread the word, and ping us if you hit snags.

Let's keep shipping! Onward! 💜

[Polygon Foundation @0xPolygonFdn]

Polygon PoS Heimdall v2

Mainnet migration is scheduled for July 10, 2025, with deployment expected from 02:00–05:00 PM UTC.

Block height: 24404500

Technical context for node operators below and more details here: https://t.co/ZIoQ6ozqIF

For questions and coordination, please reach out in the forum.

Following the upgrade, Heimdall will finalize blocks in ~5s. This will enable fast and absolute finality, rather than relying on probabilistic confirmation via block depth.

[Polygon Foundation @0xPolygonFdn]

Polygon PoS Heimdall v.2 Migration: Released on Amoy Testnet.

Improvements
PIP-62: Migration from Heimdall v.1 to v.2 with genesis data imported
PIP-43: upgrading consensus layer with CometBFT to streamline transaction processing, improve state synchronization, and allow more efficient handling of external data
PIP-44: refactoring to upgrade dependency on Cosmos SDK

Mainnet release coming soon.

[Polygon | POL @0xPolygon]

https://t.co/was07xZKkF

[Pratik Patil @pratikspatil024]

v2.1.0 is out! One step closer to Bhilai (Pectra) HF.
Been grinding on this for ~2 months. Super proud of this one and the Polygon Chain team.
https://t.co/wDEtfE0tnD

[Sandeep | CEO, Polygon Foundation (※,※) @sandeepnailwal]

BIG update - As the largest holder of POL and someone who dedicated his life to development and success of @0xPolygon from the very beginning, I have decided to take full control of Polygon Foundation and will be its CEO going forward. Polygon Foundation owns and oversees multiple entities including one of the major contributors, Polygon Labs, which will continue to be led by Marc Boiron @0xMarcB as its CEO, who in my mind is the best executive/leader in the entire crypto industry.

I’ve always stayed away from moving into the CEO role because I’ve been focused on building PF as an institutionally governed foundation. But right now, Polygon needs clear direction and focused execution and that means stepping up.

With a healthy treasury and several hundred million in cash, we’re in a great position to keep building for the long term, without any distractions or pressure to raise.

Today, I’m announcing a series of much-needed changes designed to deliver greater value to POL stakers and bring increased clarity to the broader market.

1. We will depreciate Polygon zkEVM next year. Polygon’s razor focus is going to be Polygon PoS and @Agglayer, nothing else. Polygon PoS will focus on Stablecoin payments and RWAs, while Agglayer will focus on building a trustless Internet of Blockchains.

2. The first milestone of the Polygon POS's Gigagas roadmap is now live in testnet. This first upgrade pushes network capacity beyond 1,000 transactions per second early July and it's only the beginning. We already have the plan to move to zero reorgs and <1 second finality with >5000 TPS achieved in a devnet enviornment. This will put Polygon PoS amongst the most performant blockchains by Sept-Oct timeframe. And beyond that, we have a clear path to scale to 100k+ TPS over next few years. These upgrades massively increase the economic viability of Polygon protocol and thereby the value for POL stakers.

3. Agglayer v0.3 has been in the making and I am announcing week of June 30th as the rollout date. This version of Agglayer is feature complete except fast interop which we anticipate to be completed by end of Q3. We are back to massive shipping mode.

4. The Agglayer Breakout program will continue to spin off projects resulting in increased focus for Polygon PoS and Agglayer and massive airdrops to POL stakers. We are in the business of building blockchain networks and ZK is an important tool to bring that internet level scalability to blockchains. We have contributed a lot to ZK and will continue to do so in a more neutral way by spinning out more of ZK research efforts. Next up is Polygon ZisK led by Jordi Baylina @jbaylina. More to come.

5. Now that the SEC has dropped its investigations and lawsuits related to MATIC as a security, which should have never existed given the nature of MATIC (and now POL), we are excited to see several large market makers coming back to the table in recent days to make markets in POL that strengthens the liquidity of POL on exchanges globally.

6. The Foundation will also engage in educational campaigns to ensure everyone is aware of the upgrade of MATIC to POL.

7. Bringing the Polygon brand front and center into what was previously the neutral Agglayer brand. It’s time to align the ecosystem more clearly and boldly under the Polygon identity.

Also, going forward, major announcements from Polygon often will come from my twitter account, so follow me to be up to date and turn on your notifications.

So why am I doing this?

During 2021-22, we made a real effort to institutionalise the project by onboarding some amazing people as co-founders and board members and laying the foundation for scaling Polygon from the 10-100 stage of a venture.

But little did I know, Ethereum itself was going to go into an existential crisis that would pull Polygon and the entire Ethereum ecosystem right back to the 1-to-10 stage … or by some measures, even 0-to-1.

And the 0-to-1 stage is a different beast. It needs speed, courage to make bold bets, and the ability to handle failure. Also, the crypto industry has changed from being research centric to user centric and Polygon needs to change accordingly. Institutional setups and board structures are great for stability, but they tend to produce average-case decisions — not the sharp, aggressive moves needed to deliver exponential outcomes.

Polygon is now back as a zero to one startup setup. With the support of an incredible team at Polygon Labs, and strong leadership including Marc @0xMarcB, Mudit Gupta @Mudit__Gupta (CTO), Ryan (COO) @web3RyanN and many others we are going to BRING IT.

Let’s play!

[Marcello Ardizzone @marcell033]

👀

[Katana ⚔️ @katana]

wake the fk up samurai. this is katana.

not just another general purpose chain. a defi chain forged to kill idle assets via deep liquidity &amp; high yield. public mainnet coming late june.

incubated by @0xpolygon x @gsr_io

pre-deposits live ⚔️ stop sleeping on your bags

[Marcello Ardizzone @marcell033]

🔥 Excited to be speaking at #EthCC in Cannes!

I’ll be diving into how Polygon uses CometBFT vote extensions to enable seamless L1-L2 coordination between Ethereum and Polygon PoS.

Let’s connect in Cannes!
Devs &amp; blockchain enthusiasts welcome!

See u there 💜

[EthCC - Ethereum Community Conference @EthCC]

Say hello to more EthCC[8] speakers!

István András Seres from Eötvös Loránd University (@Istvan_A_Seres)
Track: 🧬 Zero Knowledge & Cryptography

Alex Vinyas from CoW Swap
Track: 🏦 DeFi

Marcello Ardizzone from Polygon Labs (@marcell033)
Track: 🛠️ Built on Ethereum Demo

Gwen from Consensys (@Gwenole_M)
Track: 💡 For Developers and Users

See you in Cannes! 💙💛🧡

[Harry Rook @Harry__Rook]

1/ Yesterday, we held PPGC-32. Developers are finalizing the Bhilai hard fork and completing migration tooling for Heimdall v2. A new long-term scaling architecture for Polygon PoS was also introduced.

Summary of key topics:
➡️ PIP-63: Bhilai Hardfork
➡️ PIP-62: Heimdall v.2 Migration
➡️ PIP-64: Validator-Elected Block Producer
➡️ Economic Model for VEBloP Architecture

Agenda: https://t.co/bWRr2Ez2WI

[Polygon | POL @0xPolygon]

POL Value Accrual #2

Introducing the Agglayer Breakout Program–built to incubate aggregated chains, bootstrapping network effects on Agglayer while driving value to POL stakers via airdrops 🪂

The first cohort:
• @PrivadoID
• @0xPolygonMiden
• [redacted]

[Polygon | POL @0xPolygon]

POL Value Accrual #1

POL will power Agglayer.

Everything you wanted to know about POL's value generated from @Agglayer and Polygon:
https://t.co/DigX6XdW2T