mitmproxy decode grpc response

Question

i want to intercept requests using mitmproxy, but response is encode with grpc, this is my current code :

from mitmproxy import http
from mitmproxy import ctx

class TestProxy:
    following = "Search"

    def response(self, flow: http.HTTPFlow) -> None:
        if (self.following in flow.request.pretty_url):
            print(flow.request.pretty_url)

            #bytes.fromhex(flow.response.content).decode('utf-8')
            pass

addons = [TestProxy()]

i want to decode the flow.response.content, i tried using bytes.fromhex and more, without success.

How i can decode grpc response ?