Tobías Valdés Castro

eryx / computer sc / musician

[Eryx @eryxcoop]

4 open-source tools. Developer-ready. Built for Cardano.

That's our ZK Capabilities proposal — Chino breaks down exactly what we're building and why it matters.

Watch, then vote 👇
https://t.co/7goTlC1QWI

[Eryx @eryxcoop]

We're not building a nice-to-have. We're building infrastructure.

Private voting. Anonymous credentials. ZK-based DeFi. Verifiable off-chain computation.
These aren't futuristic ideas, they're things other chains can already support today.

Cardano can too. But only if the foundational tools exist.

If you're on the fence about our proposal, we wrote the full case. Worth a read before you vote 👇
https://t.co/Nmm0R0edGS

[Eryx @eryxcoop]

GREAT NEWS KEEP COMING!!

Our ZK Bridge just hit its first real transaction on Cardano Preview. 🎉

It's a proof of concept, but a working one. Here's what's under the hood:

→ Mithril for trustless state verification
→ Transactions built with TX3 by @txpipe_tools

The full flow will light up as soon as Mithril ships their next update, nearly there.

More details coming soon. Got questions about the ZK Bridge? Drop them below 👇

Verify the tx yourself:
https://t.co/kIbCXSysbg

[Eryx @eryxcoop]

ZK technology unlocks things most people don't even know they're missing.

Our mathematician Chino Cribioli @0xRocketRaccoon breaks down the problem we're trying to solve in under 30 seconds.

Watch, then vote 👇
https://t.co/Whe3vb5JfC

[Eryx @eryxcoop]

Zero-Knowledge is no longer optional infrastructure. It’s the foundation for scalable, private and verifiable applications.

With our new proposal, we want to bring core ZK capabilities directly to Cardano L1:
→ PLONK verification in Aiken
→ RISC Zero integration
→ Semaphore for anonymous signaling
→ Better ZK tooling for developers
Open-source infrastructure designed to expand what can be built on Cardano.
If we want privacy-preserving DeFi, verifiable off-chain computation, anonymous governance and next-gen applications, we need the tooling to make them possible.

Proposal 👇
https://t.co/rGmrEJ5fXp

[Eryx @eryxcoop]

https://t.co/A2HNquPmq2

[Eryx @eryxcoop]

This is how we lived Buidler Fest 2025, the 3rd edition of Cardano’s dev convention, organized by our friends at @txpipe_tools

Talks, open spaces, great food, a beautiful venue… and devs turning into musicians for live jams and karaoke.

Amazing vibes all around 🎶

[Eryx @eryxcoop]

ZkLogin runs fully on top of Cardano, no protocol changes required.

We leverage smart contracts (validators) to verify ZK proofs on-chain, enabling a secure, non-custodial, and privacy-preserving login flow.
Explore more:

→ Crypto: https://t.co/TbTWC76Bh6

→ GitHub: https://t.co/NaIIwdlZ3X

→ Website: https://t.co/bObRUjh1YR

[Eryx @eryxcoop]

ZkLogin on Cardano: done ✅
We built a Zero-Knowledge authentication flow using OpenID (e.g. Google login) -unlocking wallets without seed phrases, without custody, and without leaking identity.

→ https://t.co/5JQLcQkf9H

→ https://t.co/uhTsNyI7LT

Privacy + UX, no trade-offs.

[Tobías Valdés Castro @Tobini2]

@txpipe_tools @eryxcoop 🫡🫡🫡

[agus 🐦‍⬛ 🇦🇷 @agustinenada]

Discussing ZK Bridge on Cardano by @eryxcoop presented by Chino

[Eryx @eryxcoop]

The Buidler Fest is getting good 😏

Last night we sang our hearts out while our partner @Tobini2 played the piano.

Turns out there are way more musical talents than expected… so yeah, we’re officially ready to start a band with @txpipe_tools

[agus 🐦‍⬛ 🇦🇷 @agustinenada]

The perfect gift doesn’t exi…..

[Eryx @eryxcoop]

What you're seeing is a cryptographer out there pollinating knowledge.
We’re kicking off 2026 by growing the team and diving into new projects.

This is going to be a big year!

[Eryx @eryxcoop]

Tomorrow is the big day!
Catalyst Fund 15 voting begins.
We want to boost Cardano’s ZK capabilities and this proposal is built to do exactly that.

A three-day, hands-on ZK bootcamp to train a new generation of Cardano ZK developers.

https://t.co/d7iZVK16XZ

[Eryx @eryxcoop]

We’re very glad to tell you that our two proposals made it into the voting phase!

We believe our ZK Bootcamp will unlock Cardano’s true ZK potential, and ZK Credentials will enable privacy-first applications.

Check them out, the voting phase is only 4 days away.

[Eryx @eryxcoop]

4 DAYS LEFT until Catalyst Fund15 voting kicks off 🚀

We keep building ZK on Cardano with two proposals:

ZK Bootcamp: training the next wave of Cardano devs in zero-knowledge
https://t.co/d7iZVK16XZ

ZK Credentials: privacy-preserving credentials for institutions & their members
https://t.co/PPdy9mzBwZ

Let’s keep pushing Cardano toward a privacy-first future .

[Eryx @eryxcoop]

We’re back after a short break!
Any news around here??

Remember check out our Catalyst fund 15 proposals (lindk on thread).
We’re so excited about what’s coming next, stay tuned for updates!

[Eryx @eryxcoop]

And the second proposal is here! 👇

ZK Bootcamp for Cardano.
Today, there are very few Cardano developers with real Zero-Knowledge expertise, which limits the ecosystem’s ability to build privacy-preserving and scalable applications.
Our solution: a hands-on Zero-Knowledge Bootcamp, delivered and recorded by Eryx experts, covering foundational cryptography, ZK tools, and real Cardano implementations.

Learn more & support the proposal 👉
https://t.co/d7iZVK16XZ