According to NULS 'announcement, NULS has completed the cross-chain integration and testing of BTC and ETH native assets, and plans to merge the code into the mainnet in the near future. After the upgrade is completed, users can directly use BTC and ETH as gas fees on the NULS network. Both NULS nodes and Stakers will receive the benefits of the network gas fee. This move makes NULS the first public chain to support multiple assets as a main network gas fee, marking an important innovation.