code: def do_genesis_block_audit(genesis_block_path=None, key_id=None):
      
      signing_keys = GENESIS_BLOCK_SIGNING_KEYS
      if genesis_block_path is not None:
          # alternative genesis block
          genesis_block_load(genesis_block_path)
      
      if key_id is not None:
          # alternative signing key
          gpg2_path = find_gpg2()
          assert gpg2_path, 'You need to install gpg2'
          p = subprocess.Popen([gpg2_path, '-a', '--export', key_id], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
          out, err = p.communicate()
          if p.returncode != 0:
              log.error('Failed to load key {}\n{}'.format(key_id, err))
              return False
  
          signing_keys = { key_id: out.strip() }
          
      res = genesis_block_audit(get_genesis_block_stages(), key_bundle=signing_keys)
      if not res:
          log.error('Genesis block is NOT signed by {}'.format(', '.join(signing_keys.keys())))
          return False
  
      return True
docs: Loads and audits the genesis block, optionally using an alternative key