Cardano Builder Meetup Online #2 - 22/03/2025 - Recap
Event Information
Following the great success of the first session, Cardano Builder Meetup Online #2 was held on Saturday, March 22, 2025, from 8:00 PM to 10:00 PM (GMT+7) via Zoom, with the participation of more than 125 beginner developers and builders.
This event is part of the Cardano Blockchain Programming Training for Beginner Developers series, fully sponsored by Cardano Vietnam, aiming to build foundational knowledge and practical skills for those who want to create dApps on the Cardano blockchain.
Registration: Meetup.com Event Page
Community: Cardano Builder Vietnam Community Telegram
Main Topics of the Second Session
The second meetup transitioned from theory into hands-on blockchain architecture and logic, empowering participants to better understand Cardano’s infrastructure for dApp development.
Cardano Wallets and Addresses
- Clarified the difference between a wallet (which stores private/public key pairs) and a wallet address (used to receive transactions).
- Explained how wallet addresses are derived, and their role in the transaction process.
Hash Functions, Asymmetric Encryption, and Digital Signatures
- Continued from Meetup #1 with deeper exploration of hash functions, focusing on their use in verifying integrity and creating digital fingerprints.
- Reviewed how asymmetric encryption secures transactions on Cardano.
- Analyzed real-world examples of digital signatures and how they prove ownership and authenticity.
UTxO Model & Smart Contract Operation
- Introduced the UTxO (Unspent Transaction Output) model in more technical detail.
- Compared the UTxO model to traditional account-based models (e.g., Ethereum).
- Discussed how smart contracts operate in Cardano using UTxO logic, and how EUTXO extends this to support stateful smart contracts.
Key Q&A Highlights
Participants raised insightful questions during the live Q&A segment, showing strong engagement and curiosity about the Cardano tech stack.
Questions:
- Why does Cardano choose the UTxO model instead of the account model like Ethereum?
- Can a wallet address be reused in multiple contracts, or should each dApp use a separate address?
- What happens if a transaction has multiple inputs and outputs? How is it handled in Cardano’s UTxO model?
- How does digital signature verification work in a multi-sig wallet setup?
- Is it possible for a hacker to create a fake transaction by replicating a hash?
- What are the benefits and limitations of using hash functions in blockchain transactions?
Community Interaction & Learning Atmosphere
Though virtual, the session maintained a highly interactive atmosphere. The chat was active throughout the meetup, and post-event discussions continued in the Cardano Builder Vietnam Telegram group, where builders shared resources and further explored the session topics.
Reflections & Appreciation
Cardano Builder Meetup Online #2 demonstrated that the Vietnamese builder community is not only enthusiastic but also ready to tackle more advanced blockchain concepts.
We sincerely thank all participants and look forward to seeing you again in the upcoming sessions!
Stay tuned for the next meetups in the series!
Follow the Cardano Vietnam community at:
Join the Builder Support Channels:
- Telegram: https://t.me/CardanoBuilderVietnam
- Twitter (Asia-wide): https://x.com/BuilderAsia
- Discord: https://discord.gg/zeB3GuM3t5
- Website & Event Schedule: https://cardanobuilders.github.io/en
- https://cardanobuilders.github.io/en/schedule
See you at Cardano Builder Meetup Online #3! 
Video Recording
On behalf of the organizing committee,
Ha Nguyen – Cardano Ambassador
Cardano Vietnam Community