Prediction-market platform Polymarket began deploying Protocol V2 across a limited set of live markets on Monday, with a tentative Nov. 2 target for moving new markets onto the rebuilt smart-contract system, according to a post on X by Rajath Alex, the company's head of protocol.

What changes for users and markets?

The upgrade replaces infrastructure built on 2019-era code that required separate contracts for each new market type. Protocol V2 consolidates position tokens into a single contract and routes trading through one exchange that supports multiple market formats.

pUSD, the Polymarket USD stablecoin introduced in an April 2026 exchange upgrade, becomes the sole collateral token across V2 markets. The stablecoin is backed 1:1 by Circle's USDC and is issued on Polygon, where Polymarket has run its prediction markets to date. Existing positions will not migrate automatically; users do not need to execute technical steps, though they may be prompted to approve new contracts when trading, per the Protocol V2 migration guide.

How does the new contract architecture work?

V2 introduces upgradeable smart contracts that Polymarket can modify through a "secure governance process," reducing the requirement to deploy new contracts for each additional feature. The protocol also ships OracleAggregator, a layer designed to connect to multiple data providers — including UMA and Chainlink — for resolving market outcomes.

The new stack underwent audits by blockchain security firms Cantina, Quantstamp and Zellic, with formal verification conducted by Certora. Polymarket is offering bug-bounty rewards of up to $5 million for critical vulnerabilities discovered in the system.

Will Polymarket expand beyond Polygon?

The protocol was engineered to support transferring positions, collateral, and market outcome data between blockchains, though Polymarket has not disclosed launch timing or target networks. Cointelegraph reached out to Polymarket for details on which chains the team plans to support and when the expansion could take place.

Testing of V2 runs on a limited number of live markets through Oct. 30. The Nov. 2 switchover covers new markets only; legacy positions remain on the prior contract system until separately addressed.

What are the operational and business consequences?

For traders, the cutover introduces one approval flow, one collateral token, and consolidated order routing, lowering the friction of adding new event categories. For Polymarket, the upgradeable design and modular oracle layer shorten the path to launching additional market formats and resolving them through third-party data feeds rather than bespoke infrastructure.

The cross-chain scaffolding positions the platform for multi-network deployment, which would broaden its addressable liquidity and reduce dependence on Polygon's block space and bridge flows. With the November 2 cutover pending, the next concrete milestone is the live status of new V2 markets and any operational disclosure around cross-chain support.