7

I'm trying to get all events from contract, but get error: "ValueError: {'code': -32601, 'message': 'The method eth_newFilter does not exist/is not available'}"

I'm using Web3py and Infura. My code:

myfilter = <myContract>.events.<MyEvent>.createFilter(fromBlock=0)

or

myFilter = web3.eth.filter({"address": <myContractAddress>})

Why is this error? How do I get events? Help me please.

3
  • 1
    How are you connecting to Infura? eth_newFilter is only available via websocket. Commented Dec 4, 2019 at 12:12
  • Like this: from web3 import Web3 PROVIDER = 'https://ropsten.infura.io/v3/xxxxxxxxxxx' web3 = Web3(Web3.HTTPProvider(PROVIDER))
    – Alex
    Commented Dec 4, 2019 at 13:03
  • @iamdefinitelyahuman So I don't know why this error. As you can see in the code, I use Infura.
    – Alex
    Commented Dec 4, 2019 at 13:06

1 Answer 1

7

The issue is that Infura only exposes the eth_newFilter endpoint via websockets, but you are connecting via https.

Try using a WebsocketProvider when declaring your web3 instance, as shown in the following example:

from web3 import Web3

PROVIDER = "wss://ropsten.infura.io/ws/v3/YOUR-PROJECT-ID"
web3 = Web3(Web3.WebsocketProvider(PROVIDER))
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  • Will all other methods work correctly? (via WebsocketProvider) And it will not affect speed of working with Infura?
    – Alex
    Commented Dec 4, 2019 at 15:30
  • 1
    Yes, per the infura docs all https endpoints will be available. And websockets is typically quicker. Commented Dec 4, 2019 at 15:42
  • Thank you! But I have other error
    – Alex
    Commented Dec 4, 2019 at 16:54
  • "websockets.exceptions.InvalidStatusCode: Status code not 101: 404"
    – Alex
    Commented Dec 4, 2019 at 16:56
  • 1
    ahh sorry, i made a mistake in the provider URL! I've updated my answer. Commented Dec 5, 2019 at 3:03

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