README.md

System UML

Smart contract organization

Flowcharts of each function

General operation

admission

Partially restricted operation

summary

Restricted operations

vote

bid

trade

power-up

change

Most of the images above was created with LaTeX and the codes are available to read at https://www.overleaf.com/read/gdmgvdkpcqjm. The exception is the UML that was created with draw.io -- until get courage to draw with Tikz.