The issues mentioned above urge us to build a system that connects the on-chain and off-chainworlds, which can constantly monitor the operation of the contract, audit the data and assets, and accelerate the response speed of a product, making the response speed more stable, and the inevitablyasynchronous feedback more smooth and fluent. All reminders and messages triggered by conditions can not only meet users’ financial needs but also give them better product experience when using COFi applications.