https://github.com/ethereum/pyrlp/blob/e39474d5c930db200773c9c7df09e7ba9b6148f2/rlp/sedes/boolean.py#L28 Change **Must be either 0x01 or 0x00** for **Must be either 0x01 or ''**
pyrlp/rlp/sedes/boolean.py
Line 28 in e39474d
Change Must be either 0x01 or 0x00 for Must be either 0x01 or ''