[Polymarket V2 Exchange Upgrade to Launch on April 22, Now Open for Testing] Foresight News reports that Polymarket Developers announced via a tweet that the Polymarket V2 exchange upgrade will go live on April 22 and is now open for testing by all users. Developers using the API or client must complete migration work before the launch: upgrade SDK/API integrations, use the new exchange contract address and order structure, and switch collateral to pUSD (USDC.e must be wrapped into pUSD via the Collateral Onramp). During the upgrade, there will be an expected downtime of approximately 1 hour (around 19:00 Beijing Time on April 22), during which all open limit orders will be canceled, but funds and positions will remain secure. The V1 exchange will cease operations after the migration is complete.