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Python-如何获取以太坊事务？

python ethereum

Python-如何获取以太坊事务？,python,ethereum,web3,Python,Ethereum,Web3,我刚开始学习以太坊和Web3py，我希望无论何时在网络上发生事务，都能让它们发生。为了做到这一点，我注册了infura并获得了我的项目ID。下面是我尝试的： from web3 import Web3 import asyncio import websockets ABI = {"inputs":[{"internalType":"address","name":"_factory",&quo

我刚开始学习以太坊和Web3py，我希望无论何时在网络上发生事务，都能让它们发生。为了做到这一点，我注册了infura并获得了我的项目ID。下面是我尝试的：

from web3 import Web3
import asyncio
import websockets

ABI = {"inputs":[{"internalType":"address","name":"_factory","type":"address"},{"internalType":"address","name":"_WETH","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"WETH","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"amountADesired","type":"uint256"},{"internalType":"uint256","name":"amountBDesired","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"addLiquidity","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"},{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"amountTokenDesired","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"addLiquidityETH","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"},{"internalType":"uint256","name":"liquidity","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"factory","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"reserveIn","type":"uint256"},{"internalType":"uint256","name":"reserveOut","type":"uint256"}],"name":"getAmountIn","outputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"reserveIn","type":"uint256"},{"internalType":"uint256","name":"reserveOut","type":"uint256"}],"name":"getAmountOut","outputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"getAmountsIn","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"}],"name":"getAmountsOut","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"reserveA","type":"uint256"},{"internalType":"uint256","name":"reserveB","type":"uint256"}],"name":"quote","outputs":[{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidity","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidityETH","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"removeLiquidityETHSupportingFeeOnTransferTokens","outputs":[{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityETHWithPermit","outputs":[{"internalType":"uint256","name":"amountToken","type":"uint256"},{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"token","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountTokenMin","type":"uint256"},{"internalType":"uint256","name":"amountETHMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityETHWithPermitSupportingFeeOnTransferTokens","outputs":[{"internalType":"uint256","name":"amountETH","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenA","type":"address"},{"internalType":"address","name":"tokenB","type":"address"},{"internalType":"uint256","name":"liquidity","type":"uint256"},{"internalType":"uint256","name":"amountAMin","type":"uint256"},{"internalType":"uint256","name":"amountBMin","type":"uint256"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"},{"internalType":"bool","name":"approveMax","type":"bool"},{"internalType":"uint8","name":"v","type":"uint8"},{"internalType":"bytes32","name":"r","type":"bytes32"},{"internalType":"bytes32","name":"s","type":"bytes32"}],"name":"removeLiquidityWithPermit","outputs":[{"internalType":"uint256","name":"amountA","type":"uint256"},{"internalType":"uint256","name":"amountB","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapETHForExactTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactETHForTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactETHForTokensSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForETH","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForETHSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountIn","type":"uint256"},{"internalType":"uint256","name":"amountOutMin","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapExactTokensForTokensSupportingFeeOnTransferTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapTokensForExactETH","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amountOut","type":"uint256"},{"internalType":"uint256","name":"amountInMax","type":"uint256"},{"internalType":"address[]","name":"path","type":"address[]"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"deadline","type":"uint256"}],"name":"swapTokensForExactTokens","outputs":[{"internalType":"uint256[]","name":"amounts","type":"uint256[]"}],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}

def handle_event(event):
    # Define data from the event
    print(event)


async def log_loop(event_filter, poll_interval):
    while True:
        for event in event_filter:
            handle_event(event)
        await asyncio.sleep(poll_interval)

def main():
    w3 = Web3(Web3.WebsocketProvider(f'wss://mainnet.infura.io/ws/v3/<MY-PRIJECT>'))
    uniswap = w3.eth.contract('0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D', abi=ABI)
    block_filter = uniswap.events.getLogs.createFilter(fromBlock = 'latest').get_all_entries()
    
    loop = asyncio.get_event_loop()

    try:
        loop.run_until_complete(asyncio.gather(log_loop(block_filter, 2)))
    finally:
        loop.close()

if __name__ == '__main__':
    main()
但这并没有给我什么

如何在进行新交易后立即获取消息并获取该交易的ETH金额？欢迎提供任何建议

如中所述，使用集中化工具（如）执行此类任务更简单/更快

假设此解决方案适合您，那么就很容易得到您想要的：

导入json
导入时间
导入请求
#在此处放置您自己的Etherscan API密钥
以太扫描API密钥=
地址=“0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D”
def get_last_block（）：
返回int（json.loads（requests.get(
f“https://api.etherscan.io/api?module=block&action=getblocknobytime×tamp={round（time.time（））}&closest=before&apikey={ETHERSCAN\u API\u KEY}”
).text）[“结果”]）
def get_last_txs（自=2起）：
返回json.load（requests.get(
f“https://api.etherscan.io/api?module=account&action=txlist&address={ADDRESS}&startblock={get_last_block（）-since}&sort=asc&apikey={ETHERSCAN_API_KEY}”
).text）[“结果”]
txs=get_last_txs（）
在shell中，您将获得以下行为：

>类型（txs）
>>>len（txs）
60
>>>txs[0]
{'blockNumber'：'11887758'，'timeStamp'：'1613743087'，'hash'：'0xACB6BA33C7FC4D8DB7AD8BA4B0963ED0E6C2050842D189BA09B8A06B81EBC32'，'nonce'：'25'，'blockHash'：'0xEBF1B16B9BCCFB2AB43A304DFE2FB3D6C80D714669FD7BB651AF98D497DDBEA'，'Transactionidex'：'56'，'from'：'0xD8F19C129E10CF4606E57257D455F2525257B457D397B4D7D257D7D7D7D7D7D7D7D7D7D7D7D7D7D7D7D7D7D7D7D7D74c659f2488d、‘值’：‘0’、‘气体’：‘198839’、‘加斯普里斯’：‘191000000000’、‘isError’：‘0’、‘TXU状态’：‘1’、‘输入’：‘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，“合同地址：”“累计使用量：”“3396”885'，“使用气体”：“155481'，“确认书”：“3'}
>>>txs[-1]
{'blockNumber'：'11887760'，'timeStamp'：'1613743113'，'hash'：'0x6228f262db37a2eeaba16869e45cboe632f301bda57fd9c7c54a2abe26b'，'nonce'：'763'，'blockHash'：'0x3352a2613fd38d1a4e90d8cac7df6f06f0fdfe3b9f20557b7d60b2e364e'，'transactionionindex'：'214'，'from'：'0xfb49ca52e398b9b697e747f8f8c257f257f257f257d7f257f257f257f257f7f7f257f7f7f7f7f7f7f7f7f7f7f7f7f7f7f7cb4c659f2488d、‘值’：‘0’、‘气体’：‘174926’、‘加斯普里斯’：‘148832420000’、‘isError’：‘1’、‘txreceipt_状态’：‘0’、‘输入’：‘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，'汽油'：'23683'，'确认书'：'1'}
然后，您可以自由地对这些事务执行任何您想要的操作。当然，您可以查看Etherscan API以获得您想要获得的任何其他信息。但是要小心，因为您被限制为5个请求/秒。这就是为什么
since
参数可能显示有用：您可以每10秒发出一个请求，但考虑到最后2或3个块，您肯定不会错过一个事务。您还必须考虑到API最多返回10000个事务的事实，所以如果您希望在这个合同上有完整的交易历史，那么您必须得到10000到10000的事务。
如果这不是您想要的，请告诉我，我很乐意删除我的答案。

是的，使用Etherscan确实是一个很好的解决方案。唯一的缺点是利率限制，但我可以解决这个问题。多谢各位！ 
import asyncio
import websockets

async def connect():
    uri = "wss://mainnet.infura.io/ws/v3/<MY-PROJECT>"
    async with websockets.connect(uri) as ws:
        await ws.send('{"jsonrpc":"2.0", "id": 1, "method": "eth_subscribe", "params": ["logs", {"address": "0x7a250d5630b4cf539739df2c5dacb4c659f2488d"}]}')

        while True:
            msg = await ws.recv()
            message = json.loads(msg)
            print(message)

asyncio.get_event_loop().run_until_complete(connect())