This repo is obsolete, it remains here becasue it's still used by subscriptions-project and AMP but it should not be used for new projects, future availability is not guaranteed.
For a detailed tutorial on how to use this library please go through https://developers.google.com/pay/api/web/guides/tutorial
Once you have
bazel installed
please run bash git clone https://github.com/google/payjs.git cd payjs bazel build src:pay