code: async def create_link_secret(self, link_secret: str) -> None:
          
  
          LOGGER.debug('HolderProver.create_link_secret >>> link_secret: %s', link_secret)
  
          try:
              await anoncreds.prover_create_master_secret(self.wallet.handle, link_secret)
          except IndyError as x_indy:
              if x_indy.error_code == ErrorCode.AnoncredsMasterSecretDuplicateNameError:
                  LOGGER.info('HolderProver did not create link secret - it already exists')
              else:
                  LOGGER.debug(
                      'HolderProver.create_link_secret: <!< cannot create link secret %s, indy error code %s',
                      self.wallet.name,
                      x_indy.error_code)
                  raise
  
          self._link_secret = link_secret
          LOGGER.debug('HolderProver.create_link_secret <<<')
docs: Create link secret (a.k.a. master secret) used in proofs by HolderProver.
  
          Raise any IndyError causing failure to set link secret in wallet.
  
          :param link_secret: label for link secret; indy-sdk uses label to generate link secret