code: def payment_init(self, wallet):
          
  
          wallet = self._process_value(wallet, 'wallet')
  
          payload = {"wallet": wallet}
  
          resp = self.call('payment_init', payload)
  
          return resp['status'] == 'Ready'
docs: Marks all accounts in wallet as available for being used as a payment
          session.
  
          :param wallet: Wallet to init payment in
          :type wallet: str
  
          :raises: :py:exc:`nano.rpc.RPCException`
  
          >>> rpc.payment_init(
          ...     wallet="000D1BAEC8EC208142C99059B393051BAC8380F9B5A2E6B2489A277D81789F3F"
          ... )
          True