Method load_cache

code-ch13/tx.py:51–54

(cls, filename)

    @classmethod
    def load_cache(cls, filename):
        disk_cache = json.loads(open(filename, 'r').read())
        for k, raw_hex in disk_cache.items():
            cls.cache[k] = Tx.parse(BytesIO(bytes.fromhex(raw_hex)))

    @classmethod
    def dump_cache(cls, filename):