Extended moves settlement from Starknet to Circle’s Arc on October 22

Extended, a decentralized perpetuals exchange, is packing up its settlement layer and moving from Starknet to Arc, the Layer 1 blockchain developed by Circle. The migration is scheduled to begin on October 22, 2026, at 13:00 UTC. What changes, and what doesn’t Extended says trading will run without interruption throughout the migration. Deposits and withdrawals will pause for up to two hours while the move takes place. For most users, no action is required. The exchange expects the majority of participants to wake up on the other side of the migration with balances intact and positions untouched. USDT and wBTC will not be supported on Arc. Users holding either asset have two options before the October 21, 2026, deadline. They can convert USDT into USDC and wBTC into cirBTC at a 1:1 ratio, or they can withdraw. The conversion terms also include a 0.50% premium. Traders holding meaningful USDT or wBTC balances should check exactly how that premium applies to their holdings before the cutoff. ETH holders get the easy version. Their balances will be automatically converted to wETH at a 1:1 ratio, with no paperwork required. Why Arc, and why now Arc is Circle’s own blockchain, and its m...