What is this repo?

This repo contains the oracle server that helps enforce 3 PIN tentatives on Jade.

The oracle is blind to the pin and should be easy to run an instance of the server over Tor.

In the future we plan to use the pin server in other projects such as Blockstream Green.

To generate a new key

python -m venv venv

. venv/bin/activate

pip install --require-hashes -r requirements.txt

PYTHONPATH=.. python -m blind_pin_server.generateserverkey

Securing the server key

Anyone who can read server_private_key.key can impersonate this server, so it is created mode 0600 and the server refuses to start if it is readable by anyone else.

In the container it is read by www-data:

sudo chown www-data:www-data server_private_key.key

sudo chmod 600 server_private_key.key

Mount it read-only (:ro, as below) so the container can't alter it.

Build the docker image

docker build -f Dockerfile . -t dockerized_pinserver

Prepare the directory for all the pins

mkdir pinsdir

Run the docker image (requires the previous steps)

docker run -v $PWD/server_private_key.key:/server_private_key.key:ro -v $PWD/pinsdir:/pins -p 8096:8096 dockerized_pinserver