# How to Make Real Time Proving Possible Today and Why | Orest Tarasuik at Pragma Prague 2025

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-10-09
- Duration: 21:57
- Topics: t1 Protocol, Orest Tarasuik, real-time proving, Ethereum rollups, L2 interoperability, trusted execution environment, TEE, zero-knowledge proofs, ZKP, cryptoeconomic security, cross-rollup composability, Arbitrum, Optimism, Scroll, EIP-7683, intents, shared sequencer, fragmentation, finality, restaking, bespoke ZKP, deterministic state, fault attribution, DevNet, multi-chain, Solidity, DeFi bridges, asynchronous composability, block time, UX vs security, Pragma Prague 2025
- Watch: https://streameth.org/watch/yt-kFcRf6C3ikQ
- YouTube: https://www.youtube.com/watch?v=kFcRf6C3ikQ

## Description

Orest Tarasuik, co-founder of t1, presents a groundbreaking solution for real-time proving and cross-rollup composability at Pragma Prague 2025. Learn how t1 combines trusted execution environments (TEEs), zero-knowledge proofs (ZKPs), and cryptoeconomic security to enable instant state verification between Ethereum L2s like Arbitrum, Optimism, and Scroll. Discover how this approach solves fragmentation, reduces finality times from days to seconds, and unlocks new possibilities for intents-based systems (EIP-7683) and seamless DeFi interoperability. A must-watch for developers building the future of multi-chain Ethereum.

00:00 Introduction to real-time proving challenge
00:48 Defining real-time proving under 12 seconds
01:28 The problem of rollup fragmentation
02:07 Audience poll on trusted execution environments
02:55 t1's hybrid TEE + ZKP + cryptoeconomic approach
03:38 Lessons from Scroll about scalability tradeoffs
04:24 Technical definition of real-time proving
05:08 Creating programmable interoperability
05:55 Comparing finality times across L2 solutions
06:38 Ethereum block time as speed limit
07:25 Demo of instant cross-rollup transactions
08:00 Market reality favoring UX over perfect security
08:40 Why multi-chain is inevitable but bridges are broken
09:26 The failed promise of shared sequencers
10:09 Betting on asynchronous composability
10:56 ZK proving speed developments
11:42 TEE security limits and attack thresholds
12:26 Fault attribution via deterministic states
13:15 Restaking for cryptoeconomic security
14:02 Handling large TVL with bespoke ZKP safety
15:34 Supporting non-EVM chains with Solidity UX
16:23 Live DevNet demo of instant transactions
17:42 TEEs rebranded from villain to hero
18:26 Killer use case: Intents (EIP-7683)
19:13 How t1 cuts intent settlement from 60m to 1m
20:25 Why faster proving means better rates
21:45 Closing and how to build on t1

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🇨🇿 *Pragma Prague*
Pragma Prague 2025 was held on May 29th at Holešovice Market in Prague, Czech Republic and was an in-person summit for builders and leaders in the web3 ecosystem. This event was in collaboration with ETH Prague. Watch the full Pragma Prague YouTube Playlist here: 

ETHGlobal's Pragma series takes place in cities around the world, and is designed to be a different kind of event. Pragma is a one-stage conference with founders-only on stage, bringing together a small group of curated attendees and speakers to discuss the future of web3 and reflect on the past. 

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