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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_deposit_address(self, currency):
 """Return the deposit address for the given major currency. :param currency: Major currency name in lowercase (e.g. "btc", "eth"). :type currency: str | unicode :return: Deposit address. :rtype: str | unicode """

        self._validate_currency(currency)
        self._log('get deposit address for {}'.format(currency))
        coin_name = self.major_currencies[currency]
        return self._rest_client.post(
            endpoint='/{}_deposit_address'.format(coin_name)
        )