Epicenter - Learn about Crypto, Blockchain, Ethereum, Bitcoin and Distributed Technologies UMA & Across: Optimistic Oracles & Intent-Based Bridges for Unifying Ethereum - Hart Lambur
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Aug 1, 2025 Hart Lambur, co-founder of UMA and Across Protocol, dives deep into the world of decentralized finance. Discussing UMA's journey from synthetic assets to optimistic oracles, he explains how they revolutionized prediction markets and incentivized voter participation. Lambur also details the innovative Across bridge, designed for seamless EVM chain connectivity, achieving lightning-fast transaction speeds. The conversation highlights the complex pricing mechanisms and governance structures critical to these projects, making blockchain more accessible and user-friendly.
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Founders' Trading Background
- Hart Lambur and Allison, former Goldman Sachs traders, started UMA to make global financial contracts accessible on blockchain.
- They transitioned from synthetic assets to focusing on an optimistic oracle to resolve contract outcomes reliably.
Across Bridge's Origin Story
- Across started as an internal hackathon project using UMA's oracle to build a fast exit bridge from Optimism.
- This evolved into a full product for fast, cheap intent-based bridging connecting EVM chains.
How UMA's Optimistic Oracle Works
- UMA's optimistic oracle lets anyone propose any statement as true, with a challenge period for disputes.
- Economic incentives align participants to propose and dispute truthfully through bonds and penalties.