ChainCatcher message, dYdX Ops SubDAO posted on social media that due to the deployment of the dYdX Chain v4.0 software upgrade, there is expected to be network delays and potential outages between April 8th, 16:00 - 17:00 (time may vary).In addition, it is reminded that dYdX Chain validators using tmkms or Horcrux need to update to the latest version of the corresponding tools before the upgrade block height.Previously, the dYdX community voted to approve the proposal to upgrade the dYdX Chain protocol software to version v4.0. It is reported that this version upgrade will impact the protocol and network, including: adding the x/authz module, IBC withdrawal limits, conditional order improvements, Cosmos SDK v0.5 upgrade, etc.