Pay gas fees with USDT. This idea has actually been realized. Most people are confused when they first encounter blockchain by a question: why can I not send out coins when I have them in my wallet? It is because you do not have native tokens like ETH/BNB/SOL to pay fees. This threshold has deterred many ordinary users who want to try on-chain payments, no need for me to elaborate. Plasma's customized gas token solution is aimed at this pain point. They implemented the paymaster mechanism based on EIP-4337, allowing you to directly use whitelisted assets like USDT or pBTC to pay transaction fees. The oracle prices in real-time with no additional markup. Users only need to authorize the paymaster contract in advance. The entire process is completely seamless for those who just want to transfer funds. I compared the solutions of Solana and Base. With Solana, you must hold SOL; although it's cheap, this enforced threshold still exists. Although Base has low L2 fees, you still need to prepare ETH, and bridging across chains involves a complex set of operations. Plasma's design directly dismantles the last psychological barrier for on-chain payments. Technically, this is not difficult to understand; it is merely abstracting the gas billing logic originally at the blockchain's core. By paying through smart contracts, it deducts the equivalent amount from the user-specified ERC-20. However, the challenge lies in ensuring stability and preventing attacks. Plasma chooses to have the protocol maintain the paymaster instead of letting third parties do as they please. I believe this decision is correct; at least in the early stages, this centralized control is needed to ensure a good experience. Of course, this also brings a problem: the whitelisting mechanism means not all tokens can be used for payment. However, to be fair, using stablecoins for payment is the most reasonable choice. Who would want to use a token that fluctuates 10% daily to pay fees, right? Although this design looks simple, the number of chains that have truly implemented it is few. Plasma has indeed concretely resolved this user experience challenge: @Plasma $XPL #plasma