@muguika @CofiBlocks Coffee arrives in less than 3 business days 😁
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Jonatan Chaverri ⛩️
139 posts
Jonatan Chaverri ⛩️
@jonatanChaverri
Computer Engineer | Costa Rica 🇨🇷
Costa Rica Katılım Eylül 2009
316 Takip Edilen246 Takipçiler
@CofiBlocks keeps moving and making it easier for coffee producers to reach new coffee lovers. If you are in Costa Rica you can order now your coffee and it will arrive safely to your home thanks to Correos de Costa Rica... try it out and let me know how it goes!
CofiBlocks@CofiBlocks
First cafecito received via Correos de Costa Rica by one of CofiBlocks members in Costa Rica... testing this way of distributing delicious coffee directly from the producer to your cup!
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Jonatan Chaverri ⛩️ retweetledi
Lethe is live on Starknet Sepolia.
A zero-knowledge Bitcoin yield vault:
– Private deposits
– Unlinkable withdrawals
– Share-based yield accrual
– Noir proofs + Cairo contracts
DeFi transparency ≠ financial privacy.
Demo ↓
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Jonatan Chaverri ⛩️ retweetledi
Second meetup of the @cavosxyz <> @Starknet Re{define} hackathon in San Jose, Costa Rica. 🇨🇷
In this edition, we had special guests from @CofiBlocks @muguika @jonatanChaverri
Big thanks to the @StarknetFndn for the opportunity.
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Jonatan Chaverri ⛩️ retweetledi
🚀 Lethe is LIVE on Starknet Sepolia
Private BTC yield powered by ZK.
Shielded deposits.
Private withdrawals.
Rising share price.
Testnet only ⚠️
Break it. Give feedback.
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Jonatan Chaverri ⛩️ retweetledi
Lethe is taking shape.
Private Bitcoin yield.
No surveillance. No compromises.
Built on @StarknetEco
Privacy first, always. 🟧⚫️
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Jonatan Chaverri ⛩️ retweetledi
Jonatan Chaverri ⛩️ retweetledi
⏰ TIME IS UP.
JOKERS OF NEON SEASON 1 IS LIVE.
Build your deck.
Break the rules.
Take over the season. 🃏⚡️
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@ohayo_dojo I wish everyone a good time this year, just as Carlos seems to have had in the picture 😂
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Jonatan Chaverri ⛩️ retweetledi
Starkconnect Conversations EP 6
Meet @muguika, Founder @CofiBlocks
Me: Why are you building on @Starknet?
Karla: Account abstraction is everything if you want to onboard people that is not used to Web3.
And we're working with coffee farmers and coffee lovers.
People that usually are not super into DeFi, blockchain, crypto.
So account abstraction natively in Starknet makes sense for us.
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Jonatan Chaverri ⛩️ retweetledi
Here's how it works:
1. @CofiBlocks onboards a coffee farmer to Ready
2. CoFiBlocks members create an account and pay for coffee using crypto (@USDC)
3. The coffee farmer receives the money and spends it with their Ready Card
The result? Much more $$$ for the farmers
Ready@ready_co
Big Coffee pays Costa Rican coffee farmers less than $0.01 per kilo With @CofiBlocks and Ready Card, all of the greedy middlemen are cut out This is what crypto is all about
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Jonatan Chaverri ⛩️ retweetledi
First time as a dev in @invisiblgarden and we won a prize!
Check our zkWallet here: zk-wallet-kappa.vercel.app
Its leveraging @NoirLang circuits and @arbitrum stylus smart contracts!
@jonatanChaverri
Invisible Garden@invisiblgarden
🌿 Arbitrum Bounties at Invisible Garden — Results Are In! ⚡️ After reviewing all submissions, our mentor team has selected the winners: 🥇 1st — Heirloom Inheritance ($1,500) 🥈 2nd — Confidential EVVM ($1,000) 🥉 3rd — ZK Wallet ($500) Additionally, 6 qualified projects — including the top 3 and ZKPJWT, Lancer Private Voting System, and Torresm — will share the remaining $2,000 Stylus prize pool for their strong contributions. A heartfelt thank you to Arbitrum DAO @arbitrum for supporting builders at Invisible Garden and empowering open innovation. 💙 Congratulations to all the teams — let’s keep building what’s possible on Arbitrum. 🌱💫
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Happy to share that zkWallet, our privacy-preserving wallet, made it to the Top 3 of @invisiblgarden 2025! 🥳
Huge learning journey 🚀 Kudos to the team @Glv_exe02 and @shrameetweets for you guidance!
Invisible Garden@invisiblgarden
🌿 Arbitrum Bounties at Invisible Garden — Results Are In! ⚡️ After reviewing all submissions, our mentor team has selected the winners: 🥇 1st — Heirloom Inheritance ($1,500) 🥈 2nd — Confidential EVVM ($1,000) 🥉 3rd — ZK Wallet ($500) Additionally, 6 qualified projects — including the top 3 and ZKPJWT, Lancer Private Voting System, and Torresm — will share the remaining $2,000 Stylus prize pool for their strong contributions. A heartfelt thank you to Arbitrum DAO @arbitrum for supporting builders at Invisible Garden and empowering open innovation. 💙 Congratulations to all the teams — let’s keep building what’s possible on Arbitrum. 🌱💫
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@_mistcash @StarknetFndn @StarkWareLtd @CofiBlocks This is proof that you can integrate privacy into your app in less than 24 hours with Mist Cash 🔥 thanks bro @shrameetweets
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Jonatan Chaverri ⛩️ retweetledi
Talking about MIST, we say we always are building the privacy payments that you can use to pay for your coffee.
The vision "solidified" at @StarknetFndn @StarkWareLtd StarkConnect, when we sold coffee grounds/beans fully privately with MIST.
❤️ @CofiBlocks ❤️ @jonatanChaverri ❤️
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Jonatan Chaverri ⛩️ retweetledi
A couple of days ago we were working and fixing some bugs on @CofiBlocks with @jonatanChaverri suddenly the idea of adding privacy emerged and bum there was @shrameetweets and he integrated @_mistcash with Cofiblocks 🤯 and now folks are testing it!
@henrlihenrli
@StarknetFndn
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@Glv_exe02 Couldn’t had made it without you and the guidance of @shrameetweets thank you both 🫡 awesome team
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It wouldn’t have been possible solo. @jonatanChaverri this chad lead the whole development of it. I was just in charge of the circuits and helping him in general.
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Yesterday was the closing ceremony of @invisiblgarden!
Here’s what we built. zkWallet where your amounts and balances are private by applying FHE to the data by using ElGamal library and @NoirLang circuits of @aztecnetwork.
Watch the demo!
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Checkout what we build in almost 2 weeks for @invisiblgarden 2025!
Gerson@Glv_exe02
Yesterday was the closing ceremony of @invisiblgarden! Here’s what we built. zkWallet where your amounts and balances are private by applying FHE to the data by using ElGamal library and @NoirLang circuits of @aztecnetwork. Watch the demo!
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