coincurve no longer supports version 15
  subprocess.CalledProcessError: Command '['/private/var/folders/m8/gfy0lvq14bz9418x8bfd_zlc0000gn/T/pip-install-jankibtq/coincurve_876f93a8a1ad4e92bb612d15133fdc43/libsecp256k1/autogen.sh']' returned non-zero exit status 2.
  ----------------------------------------
  ERROR: Failed building wheel for coincurve 
  (while installing the package from pip)

Update the dependencies of the project to coincurve v16 please 