async def METHOD_NAME(self, num_bytes):
    assert self.state in (0, 1)
    self.state += 1
    if self.state-1 == 0:
        assert num_bytes == 50
        return bytes.fromhex('00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a')
    elif self.state-1 == 1:
        assert num_bytes == 66
        return bytes.fromhex('00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba')