USDX stablecoin with AI credit

By staking XAI tokens to the AI minting contract, users can obtain the equivalent value of decentralized and stable USDX at the latest market price of XAI, and when they want to redeem XAI tokens, they can return the same amount of USDX. In the initial stage, USDX is mainly used to purchase training orders, which can consume up to 20%, and will be expanded to more application scenarios in the future. The usage fee for using USDX is based on the user's AI credit score, which is accumulated by purchasing computing power robots and participating in training orders, with an annual interest rate ranging from 1% to 10%.