UMA

UMA is an optimistic oracle that can verify any natural language statement as true on the blockchain, so contracts asking for that data can be settled. 

Across, is a cross-chain bridge that supports cheap, secure, and near-instantaneous transfers between L2s and to L1. Across transfers are secured by UMA’s optimistic oracle. 

Builders can use UMA as a decentralized truth machine that is flexible enough to handle ambiguity and real-world data with human-powered dispute resolution. UMA secures and empowers a diverse set of Web3 applications, including cross-chain bridges, insurance protocols, prediction markets and customizable DAO tooling products.

Prizes will be awarded to the best projects built on top of UMA's optimistic oracle, or the Across bridge.

• 🥇 First prize: $5,000 in $UMA
• 🥈 Second prize: $2,000 in $UMA
• 🏊 Pool Prize: $3,000 in $UMA distributed between all qualifying submissions

• Guide to hacking on UMA 
• UMA documentation
• Across documentation