Polymarket Rolls Out Protocol V2, Rebuilding Its Prediction Market Engine

Published October 7, 2026, 01:45 UTC. Based on the Polymarket Protocol V2 announcement by Rajath Alex, Polymarket’s head of protocol (Oct. 5, 2026), and reporting by The Block, Cointelegraph, and TradingView.

Polymarket has started rolling out a rebuilt smart-contract system that will power every new prediction market on the platform. Protocol V2 began running on a limited set of live canary markets on October 5, 2026, with a tentative target of November 2 for switching all newly created markets to the new system, protocol lead Rajath Alex announced, The Block reported.

The upgrade is the most consequential technical change in Polymarket’s history. It retires the Gnosis Conditional Tokens Framework the platform has used since 2019 and replaces a layered stack of contracts with one unified design, which Polymarket describes as unified, modular, and audited.

The October 5 canary launch

V2 is being tested in production on a limited set of canary markets running from October 5 through October 30, 2026. On November 2, all new markets move to Protocol V2. Existing markets built on the Conditional Tokens Framework stay intact, so open positions are not being forcibly migrated mid-trade, according to the announcement.

One ERC-1155 contract replaces a pile of adapters

Under the old framework, every new market type Polymarket introduced required another adapter contract: a separate adapter for pUSD collateral, a wrapped token for negative-risk markets, an additional exchange for each market type, and individual oracle adapters for each integration. V2 collapses that into a single ERC-1155 positions token contract, one exchange serving all market types, and a single router that directs orders to the right place.

The position ID itself encodes the market type, the market, and the outcome, letting the protocol read position metadata directly from the identifier instead of going through intermediary contracts, TradingView reported. V2 initially covers four market types: Binary, Atomic Neg-risk, Incremental Neg-risk, and Combinatorial.

pUSD becomes the only collateral

Under Protocol V2, pUSD becomes the only accepted form of collateral backing positions on the platform. pUSD, short for Polymarket USD, was introduced as part of an exchange upgrade in April 2026 and is backed 1:1 by Circle’s dollar-pegged stablecoin USDC, Cointelegraph reported. Concentrating everything on one collateral asset simplifies accounting and settlement across the platform.

Oracles go pluggable

The redesign introduces an OracleAggregator that makes oracles pluggable, with UMA and Chainlink supported as resolution providers, Alex said. Rather than being locked into one way of deciding who won a market, Polymarket can now choose the resolution source that fits each market.

The new architecture also carries native provisions for moving positions, collateral, and market resolutions across chains. Polymarket currently runs its prediction markets on Polygon, where pUSD is also issued, and has not said when cross-chain functionality will activate or which networks it will support first, Cointelegraph reported.

Six audits and a $5 million bounty

On security, six firms audited the protocol, including Cantina, Certora, Quantstamp, SigmaPrime, Zellic, and Pashov, with Certora completing formal verification of the code. Polymarket is also running a bug bounty that pays up to $5 million for critical vulnerabilities.

Developers get an upgrade too. Data API V2, a Rust service built around Polymarket’s in-house on-chain indexer, is now live, meaning Polymarket reads and organizes blockchain data itself rather than leaning on outside tools, with standardized data formats and cursor-based pagination.

The $1 billion raise and the hires behind V2

The protocol rebuild comes as Polymarket has been adding senior talent and expanding its protocol team. Alex joined the company in May 2026, nearly three months before the company hired Travis VanderZanden, the founder of Bird and a former Uber and Lyft executive, as chief growth officer, The Block reported.

The company is also in talks to raise $1 billion at a $21 billion post-money valuation, with venture firm 1789 Capital set to contribute about $300 million, according to Bloomberg reporting cited by The Block. The raise would make it one of the largest private financings in crypto history.

This article is news reporting and is not investment advice.

Sources

• Rajath Alex, head of protocol at Polymarket, Protocol V2 announcement on X (Oct. 5, 2026), primary source
• The Block, Polymarket rolls out V2 upgrade with single ERC-1155 positions contract, pUSD collateral (Oct. 6, 2026)
• Cointelegraph, Polymarket Rolls Out Protocol V2, Plans Expansion Beyond Polygon (Oct. 6, 2026)
• TradingView, Polymarket unveils Protocol V2, with full switchover for new markets on Nov 2 (Oct. 6, 2026)