Polymarket has begun live-testing Protocol V2, a ground-up rewrite of the smart contracts powering its prediction markets. The new protocol is scheduled to go live on November 2, following a testing phase running from October 5 to October 30.
Protocol V2 replaces the 2019 Gnosis Conditional Tokens Framework that has underpinned the platform since its inception. The upgrade, led by head of protocol Rajath Alex, consolidates the infrastructure into three core components: a single ERC-1155 contract for position tokens, Polymarket USD (pUSD) as the sole collateral asset, and a unified router for order handling.
Technical Architecture Changes
The new protocol introduces several structural improvements. Position shares now live in one ERC-1155 contract, allowing a single contract to track multiple token types. Polymarket USD, an ERC-20 token on Polygon backed by USDC with onchain enforcement, replaces the previous collateral system.
Protocol V2 supports binary, atomic neg-risk, incremental neg-risk, and combinatorial markets at launch, each implemented as a module. A new OracleAggregator enables pluggable modules for UMA and Chainlink oracles, with room for additional integrations. The design encodes market type, market identifier, and outcome directly into each position ID.
Positions, collateral, and resolutions are designed to move across blockchains, positioning Polymarket for a multichain deployment when activated.
User and Developer Migration
For ordinary users, the transition requires minimal action beyond approving prompts in the Polymarket app. Existing holdings on the old framework will not be converted, and markets running on the legacy system will continue until resolution.
Developers and market makers have until October 30 to integrate V2 support. The contracts have undergone formal verification by Certora, and Polymarket is offering a bug bounty of up to $5 million for critical vulnerabilities.
Market Competition and Context
Regulated U.S. prediction markets processed $68.18 billion in volume over a recent 30-day period. Kalshi held a 73.4% market share with $50 billion in volume, while Polymarket U.S. captured 12.2% with $8.3 billion, representing 127% growth. Polymarket's native combinatorial market module appears designed to compete for combination bets, where Kalshi's market share recently declined from 93.5% to 83.9%.
This Protocol V2 migration represents the second major infrastructure overhaul in 2024, following an April transition to CLOB V2 and replacement of bridged USDC.e with pUSD.
