def posts(self, channel, page=None):
        """Fetch the history of a channel."""

        entrypoint = self.RCHANNELS + '/' + channel + '/' + self.RPOSTS

        params = {
            self.PPER_PAGE: self.max_items
        }

        if page is not None:
            params[self.PPAGE] = page

        response = self._fetch(entrypoint, params)

        return response