python - 使用 web3.py 通过块哈希获取 Avalanche 块数据

Question

如何通过块哈希获取块数据？我有兴趣为每个新块获取块时间戳。

from web3 import Web3

avalanche_url = 'https://api.avax.network/ext/bc/C/rpc'
provider = Web3(Web3.HTTPProvider(avalanche_url))

new_block_filter = provider.eth.filter('latest')

while True:
    block_hashes = new_block_filter.get_new_entries()
    
    for block_hash in block_hashes:
        block = provider.eth.get_block(block_hash.hex())
        print(block)

这会导致错误：

web3.exceptions.ExtraDataLengthError: The field extraData is 80 bytes, but should be 32. It is quite likely that you are connected to a POA chain. Refer to http://web3py.readthedocs.io/en/stable/middleware.html#geth-style-proof-of-authority for more details. The full extraData is: HexBytes('0x0000000000000000000000000001edd400000000000000000000000000000000000000000000000000000000002cb3970000000000000000000000000005902b00000000000000000000000000000000')

相同的查询适用于以太坊。

Answer 1

添加geth_poa_middleware对我有用：

from web3 import Web3
from web3.middleware import geth_poa_middleware

w3 = Web3(Web3.HTTPProvider('https://api.avax.network/ext/bc/C/rpc'))
w3.middleware_onion.inject(geth_poa_middleware, layer=0)