GMX disables v2.2b contracts, urges integrators to migrate to v2.2c before September 14 deadline

GMX is pulling the plug on its v2.2b synthetics contracts on September 14, 2026, completing a migration cycle that began with an earlier deprecation timeline announced on August 17. Anyone building on top of GMX’s infrastructure, whether through direct contract calls or third-party integrations, needs to move to v2.2c or risk their systems going dark. The newer contracts are already live on Arbitrum, Avalanche, and MegaETH. For regular users interacting through the official GMX interface, nothing should break. The protocol’s keepers and front-end app have historically handled these transitions without visible disruption. But for the developers and protocols that plug directly into GMX’s smart contract layer, the clock is ticking. What’s actually changing in v2.2c The v2.2c contracts introduce expanded invariant checks and role-management protections. Funding mechanisms have been updated, oracle validations refined, and collateral caps adjusted. For integrators specifically, the migration involves more than flipping a switch. New ExchangeRouter, Reader, and SimulationRouter addresses need to be plugged in. ABIs have changed. Various struct definitions have been modified. Anyone who ...