One of the leading cryptocurrency exchanges Binance announced the completion of Mainnet Hubble Upgrade.
According to the blog post, Following the successful testnet Hubble upgrade, Binance Chain validators agree to have a scheduled hard fork upgrade at block height 25,120,000. Based on the current block generation speed, it is forecasted to be around 2019/08/05 4:00 AM (UTC). In this upgrade, the validator nodes have switched to v0.6.1 and the new functions have been activated
This is a planned hardfork to add new features and improve network stability. The Hubble upgrade included BEP12, which enables exchanges to reject deposits transactions that have no valid memo. However, if you are new to Binance Chain, the improved state-sync workflow made the syncing process more stable. Binance Chain command-line tool is more powerful than before. Now, users can generate a signed transaction and then use the hex string for broadcasting.
The Binance Chain testnet had a hardfork upgrade named after Edwin Hubble, the Hubble upgrade. Basically, an hardfork is an upgrade that is not compatible with the previous release because some breaking changes are introduced in the latest release. A hardfork in Binance Chain involve +⅔ validators to successfully upgrade to keep making blocks. If the existing full nodes in the network do not upgrade, they will not be able to receive and execute further blocks normally after the hardfork block height.