UMA Restricts Polymarket Resolution Proposals to Whitelisted Addresses

UMA, the decentralized oracle provider for Polymarket, has updated its system to restrict the submission of resolution proposals to only whitelisted addresses [1]. This change is part of a transition from the Optimistic Oracle V2 (OOV2) to the Managed Optimistic Oracle V2 (MOOV2), which was formalized through the passing of the UMIP-189 governance proposal on August 6 [2]. The update aims to enhance the quality of market resolutions by limiting the number of users who can submit proposals directly, thereby reducing disputes and delays [3].

Under the MOOV2 contract, only a curated set of users—determined by their experience and historical accuracy in submitting proposals—can submit resolution data to Polymarket [1]. While the broader community can still tag these approved proposers to act on their behalf, the core resolution function is now centralized among a smaller, more reliable group. This shift is intended to prevent manipulation and early proposal disputes, particularly in non-contentious markets like sports, weather, and cryptocurrency price predictions [2].

PolymarketGuide, an independent knowledge base, noted that the previous system often resulted in low-quality or premature proposals, leading to prolonged delays and bond losses [3]. The guide described the transition as a shift from “open debates over precedent to a centralized council of proposers,” highlighting the move’s potential to streamline the resolution process and improve overall market reliability [3]. Additionally, UMA’s community manager confirmed that the new contract is now supported on its Oracle Dapp and that Polymarket is currently testing the system on the Polygon mainnet with real rewards before a full deployment [1].

Risk Labs, the company behind UMA, initially compiled a whitelist of 37 addresses for the MOOV2 launch, including employees of both UMA and Polymarket, as well as users with a track record of over 20 proposals and more than 95% accuracy [2]. While the timeline for MOOV2’s full activation on Polymarket remains unclear, the move is widely viewed as a step toward reducing manipulation and enhancing the platform’s trustworthiness [1].

The update reflects UMA’s broader strategy to refine its oracle infrastructure and improve the performance of Polymarket as a decentralized prediction market. However, some observers have raised concerns that the shift toward a whitelisted system may reduce the platform’s decentralization and community-driven nature [1]. UMA has responded by emphasizing that the current list is not permanent and that it plans to review and expand it as the ecosystem evolves [2].

Sources:

[1] AInvest, [https://www.ainvest.com/news/uma-restricts-resolution-proposals-whitelisted-entities-polymarket-2508/](https://www.ainvest.com/news/uma-restricts-resolution-proposals-whitelisted-entities-polymarket-2508/)

[2] The, [https://www.cryptotimes.io/2025/08/12/uma-limits-polymarket-resolutions-to-whitelisted-parties-only/](https://www.cryptotimes.io/2025/08/12/uma-limits-polymarket-resolutions-to-whitelisted-parties-only/)

[3] The, [https://www.theblock.co/post/366507/polymarket-uma-oracle-update](https://www.theblock.co/post/366507/polymarket-uma-oracle-update)