Polymarket rolled out a V2 upgrade to its prediction-market platform, consolidating all trading positions into a single ERC-1155 contract and adopting pUSD as base settlement collateral, according to the company's announcement.

The migration replaces the platform's prior fragmented contract architecture with one shared positions contract and shifts the underlying stablecoin used for collateralization. Both changes alter how traders interact with the protocol at the settlement layer.

What changed in V2?

Polymarket's V2 architecture pairs a single ERC-1155 positions contract with pUSD-denominated collateral. The unified contract governs all conditional outcome tokens issued across every market on the platform.

• Unified positions contract — one ERC-1155 contract handles conditional tokens for every active market.
• pUSD collateral — markets now settle against pUSD deposits rather than the stablecoin backing earlier contracts.
• Single approval — traders authorize one contract to enter any market, removing repeated approval prompts.

ERC-1155, the multi-token standard formalized in EIP-1155, lets a single contract issue and track many distinct token types through a shared balance interface. In Polymarket's V2, each market's "Yes" and "No" outcomes register as token IDs within the same positions contract. The platform can launch new events by allocating new token IDs rather than deploying fresh contract code.

Why does pUSD matter?

pUSD is a US dollar-pegged stablecoin. Migrating settlement to pUSD transfers reserve custody, redemption mechanics and attestation obligations to the stablecoin's own issuer, changing the counterparty profile relative to Polymarket's previous collateral configuration.

The shift also reframes treasury composition, off-chain liquidity management and on-chain margin accounting. The stablecoin's peg mechanism — typically backed by cash equivalents and short-duration Treasuries — now governs the integrity of every market payout settled on the platform.

What does V2 mean for traders?

The single-contract model reduces wallet-approval friction: traders sign one authorization and gain access to every market, eliminating the per-event approvals that fragmented the prior experience. Gas costs per market entry decline because contract deployment no longer amortizes across the platform's full event roster.

The consolidated positions contract centralizes event resolution and dispute logic. Every outcome now settles against shared handlers within a single contract, narrowing the surface area for code-level inconsistencies across markets.

What remains unresolved?

Polymarket has not disclosed whether legacy market positions will migrate into the unified positions contract or continue settling under prior contract logic. The platform has also not published a timeline for deprecating older market contracts or migrating treasury collateral fully into pUSD.

What comes next?

The V2 deployment positions Polymarket to scale the number of simultaneous events without proportionally increasing deployment costs or wallet-approval friction — operational constraints that throttled throughput on the prior architecture. Liquidity migration from legacy contracts and adoption metrics on the unified positions contract will determine whether the consolidated model sets a template for other on-chain prediction venues.