According to Crypto Briefing, Chainlink's Time-Weighted Average Price feeds were pushed to mainnet at approximately 19:55 UTC on July 31, introducing two averaging windows—a 30-second variant and a 60-second variant—served through Chainlink Data Streams. The deployment is positioned as a structural remedy to the manipulation surface inherent in single-snapshot price oracles, where a discrete state read at a settlement boundary can be adversarially skewed through localized liquidity events. For oracle consumers operating prediction markets, perpetuals, or any contract whose settlement logic resolves against a single price point, the transition from point-in-time reads to interval-averaged feeds reshapes the underlying threat model.
The settlement problem and its architectural fix
Single-snapshot pricing exposes a liveness-adjacent vulnerability that has been documented in various post-mortems over the past several years. Any actor holding sufficient capital can briefly push an on-chain reference price at the exact moment a market resolves, then unwind the resulting position once settlement has cleared. The cost of such an attack is bounded by the depth required to move price over a single oracle heartbeat—a value that, for sufficiently liquid pairs, can sit below the expected payout of the manipulated market. TWAP-based settlement raises the adversarial cost by averaging prices across a defined window, forcing sustained artificial pressure for the entire interval. The economic asymmetry is direct: manipulating a moving average is materially more expensive than nudging a single data point, and the differential scales with the averaging period selected.
Polymarket's adoption path and the calibration window
Polymarket has been named as the first major consumer. Per the same source, the platform intends to migrate its crypto up/down markets to TWAP-based settlement beginning August 7 at 00:00 UTC, with the 30-second feed assigned to 5-minute markets and the 60-second feed covering both 15-minute and 4-hour markets. A separate Real-Time Data Streaming WebSocket is scheduled to go live on August 4, creating a roughly four-day calibration interval during which feed parameters may still be adjusted before the full RTDS delivery ships. To underwrite the migration, $1 million in liquidity incentives is being deployed across the affected markets throughout August, effectively compensating liquidity providers for the temporary spread widening that averaging-based settlement can introduce.
Integration checkpoints for developers
For teams integrating against these feeds, several verification steps follow from the rollout. Documentation, feed IDs, and SDK examples are accessible through data.chain.link alongside Polymarket's developer resources. Pricing for select feeds begins at $150 per month, and authentication is handled through existing Data Streams credentials—no new identity layer is introduced at this stage. Developers building against Polymarket's RTDS WebSocket should treat the August 4 launch as the binding release date given the stated possibility of parameter revisions before that endpoint is finalized. Testnet equivalents were previously available; teams that have not yet validated integration behavior under sustained adversarial conditions now have a narrow window to do so before Polymarket's settlement logic migrates irrevocably on August 7.