UMA

UMA's uMA Optimistic Oracle provides price data to smart contracts across networks.

The oracle proposes prices, and these proposals are only submitted to the Data Verification Mechanism if a dispute arises.

This design lets developers retrieve price information for any length of time directly through their contracts, without embedding the price on-chain for every update.

By separating price discovery from on-chain storage, uMA enables time-bounded, on-demand data feeds that can be referenced by decentralized applications without increasing on-chain state for each price point.