dYdX Chain Resumes After 9-Hour Halt During V4 Upgrade - dYdX, the decentralized exchange (DEX) that facilitates trading of perpetual futures contracts, suffered a major outage on Monday after the chain initiated an upgrade to v4.0 of the protocol. The dydx network was down for nine hours and 32 minutes, according to dYdX’s status page, after which it resumed block ...