Idea: Allow assets issued by L2 to be transferred to L1

If users want to withdraw assets issued by L2 to L1 CKB, for example, they can transfer assets on different Layer2, or use L1’s cross-chain bridge.
For some algorithmic stablecoins or tokens with liquidity incentives, the minting rules cannot be implemented on L1. We can design script-driven sUDT or mNFT, and their owner is a script controlled by the original L2.