Decentralized Meetup by Common Prefix
Decentralized Meetup #7
Our 7th meetup is here! 🎉
Join us in Athens for another evening of community, conversations, and all things decentralized.
For this meetup, we’ve lined up two insightful talks:
1. Light Client for Optimistic Rollups - Jakov Mitrovski / Software Engineer @Common Prefix
Optimistic rollups promise scalable, low-cost blockchain applications but often compromise decentralization, because users often trust centralized providers for state access. This talk presents the design and implementation of a trust-minimized light client for optimistic rollups, with a focus on Arbitrum. We begin by describing what constitutes a rollup, then proceed to discuss rollup modularization and conclude with Arbitrum’s architecture. Building on that foundation, we outline a light client architecture that leverages interactive (prover-verifier) tournaments, consensus and execution oracles, and bisection games to resolve disputes. The prover implementation extends Arbitrum Nitro. The verifier is a Go-based program capable of identifying the latest state of the rollup. We evaluate the system in a full-chain emulation environment, analyzing performance, resource usage, and adversarial scenarios. The talk concludes with key takeaways and open directions for practical and decentralized rollup state access.
2. Cross-chain applications - Orest Tarasiuk / Co-Founder & CTO @t1
While rollups scaled Ethereum, they also isolated users, fragmented liquidity and broke composability between ecosystems. We built bridges, but users are still locked into an individual rollup ecosystem.
At t1, we fix this and restore composability by introducing programmability and TEE-enabled real-time proving. We are building the infrastructure for cross-chain applications, which are able to interact with users, applications and liquidity on any chain. This approach creates the much needed cross-chain coordination layer that’s opt-in-free. In this talk, we will present:
The concept of TEE-powered real-time proving for existing rollups that enables verifiable cross-chain smart contract reads and writes
The the first prototype of t1 applications that showcases a cross-chain application flow between on Arbitrum and Base
The long-term vision for trust-minimized real-time proving architecture
📍 Athens, Greece
📅October 31, 18:00
🎃 Optional Halloween vibes — costumes welcome but totally not required! 🦇🕸️
After the talks, join us for a casual networking session with cold beers, wine, and a selection of finger foods.
Whether you're deeply immersed in blockchain development or just curious to learn more, this is a space for everyone.
Come for the talks; stay for the connections.
Looking forward to seeing you in person!