In the current field of financial innovation, we are facing a situation similar to a mobile market lacking a unified operating system. Developers have to start building from the most basic level, not only developing applications but also being responsible for the underlying architecture. This has led to the emergence of many powerful but isolated "application islands", making the user experience fragmented and difficult to achieve synergies.

The payment finance (PayFi) stack concept proposed by Huma Finance aims to address this issue. It is not just another simple application, but a universal operating system designed for the entire value internet. PayFi provides a unified, stable, and powerful underlying support for the development of all financial applications, and is expected to become the infrastructure for future financial innovation.

This "financial operating system" has integrated all core services: from the high-speed "kernel" (transaction layer) capable of handling massive transactions, to the secure "memory mechanism" (custody layer) that manages asset ownership, and to the "permission system" (compliance layer) that automatically executes rules. It cleverly hides complexity at the bottom while providing a simple interface for upper-layer applications.

On top of this powerful operating system, developers can finally focus their energy on innovation. They no longer need to expend effort on the underlying infrastructure, but can instead fully concentrate on optimizing the user interface and innovating financial products (application layer). This will undoubtedly give rise to an unprecedented and prosperous "financial application ecosystem," making true value creation possible.

The emergence of PayFi stack marks the establishment of standards for financial innovation. It advances financial innovation from the era of independent and fragmented workshops to an industrial era based on collaborative development on a unified platform. This signifies that a more open and vibrant financial future is on the horizon.