CrowdNotifier example app

This is a very simple, high-level implementation of the steps needed to use the CrowdNotifier scheme. For all three versions, the following files are present:

• system.ts implements the HealthAuthority, Location, and a Visit
• system.spec.ts tests the different parts against each other

It is based upon the CrowdNotifier [../lib].

For the v2 version only, an enhanced functionality for a managed room registration is available in the managed.ts file. It implements the v2.1 definition of the room setup.

Running it

To run the code, type the following:

npm ci
npm start

This will run all three versions of the system and output the logs of each step.

Using it

To use it, do

npm i -S @c4dt/libcrowdnotifier

and then follow the example of system.spec.ts to get up and running. There are two modes:

• single, where each location owner only has one room
• managed, where one organizer can create many rooms

Caveats

The same caveats for usage as in the libcrowdnotifier apply:

• use await waitReady before calling any of the libraries
• use of mcl and sodium only through this package
• include 'process.browser' = true in your webpack.js for correct compilation

Authors

This code has been written by Linus Gasser for the https://C4DT.org It is based on a white paper written by Wouter Lueks*, Seda Gürses, Michael Veale, Edouard Bugnion, Marcel Salathé, Kenneth G.Paterson, and Carmela Troncoso.

License

The code is licensed under MPLv2.