Fantom Opera, the blockchain that once sat comfortably among the top DeFi ecosystems, has a firm expiration date. The network will shut down on June 30, 2026, at 17:00 GMT, and anyone still holding assets on the chain needs to move them before the lights go off.
The announcement, made on April 7 by Sonic Labs (the entity formerly known as the Fantom Foundation), marks the final chapter in a migration process that’s been underway for well over a year. For liquidity providers still parked in protocols like Stargate V1 on Fantom, it’s a more urgent call to action.
What’s actually happening
The Fantom Opera network, the original mainnet that powered the Fantom ecosystem, is being decommissioned. Once the deadline hits, the legacy infrastructure supporting the chain will go offline permanently.
Sonic Labs rebranded from the Fantom Foundation back in August 2024, signaling the strategic shift away from Opera and toward the Sonic chain. The Sonic mainnet launched on January 7, 2025, giving developers and users more than a year of runway to transition.
