python web3获取uniswapv2合约token0

要获取 UniswapV2 合约中的 Token0，您需要使用 Web3.py 库连接到以太坊网络，并通过合约地址创建一个合约实例。然后，您可以使用合约实例的相应方法来获取所需的信息。

以下是一个示例代码，演示如何使用 Web3.py 库获取 UniswapV2 合约中的 Token0：

from web3 import Web3
from web3.middleware import geth_poa_middleware
from web3.contract import ConciseContract

# 连接以太坊网络
w3 = Web3(Web3.HTTPProvider('https://mainnet.infura.io/v3/your_infura_project_id'))
w3.middleware_onion.inject(geth_poa_middleware, layer=0)

# UniswapV2 合约地址
uniswapv2_address = '0x7a250d5630b4cf539739df2c5dacb4c659f2488d'

# UniswapV2 合约 ABI
uniswapv2_abi = [
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            },
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "name": "getPair",
        "outputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    },
    {
        "inputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "name": "token0",
        "outputs": [
            {
                "internalType": "address",
                "name": "",
                "type": "address"
            }
        ],
        "stateMutability": "view",
        "type": "function"
    }
]

# 创建 UniswapV2 合约实例
uniswapv2_contract = w3.eth.contract(address=uniswapv2_address, abi=uniswapv2_abi)

# 获取指定交易对的合约地址
pair_address = uniswapv2_contract.functions.getPair(tokenA_address, tokenB_address).call()

# 创建交易对合约实例
pair_contract = w3.eth.contract(address=pair_address, abi=uniswapv2_abi)

# 获取 Token0 地址
token0_address = pair_contract.functions.token0().call()

print("Token0 address:", token0_address)

请注意，上述代码中的 UniswapV2 合约 ABI 和地址仅适用于以太坊主网。如果您想在其他网络上使用 UniswapV2 合约，您需要相应地更改 ABI 和地址。