Is there a support for grantees?

[how]

I’m not sure what you mean. Did you read this?

@XavCC

Our current best idea was shared by @dvn :
using the “sandcastle-ng” project : README.md - sandcastle-ng.git - Scripts for the deployment of Sandcastle (GNU Taler)

Then we can run the Taler software stack, including exchange, merchant, etc. with this. It will all be run inside of a container, using podman (apt install podman).

This is what https://demo.taler.net uses.