According to Odaily Planet Daily, the Sui mainnet has been upgraded to version V1.21.1, and the Sui protocol has been upgraded to version 41. Key points of the upgrade include: improved the way the balance is displayed in the sui client gas and sui client balance commands, programmable transaction blocks (PTBs) can only follow TransferObjects or MergeCoins after using the Random command, modified the signature of WalletContext::new to be synchronized Function, add Move interface for generating safe random values, enable EC (Elliptic Curve) operations in Move.