[Ethereum] ‘Contract’ object has no attribute ‘eventFilter’ web3.py

blockchaineventsfiltersgo-ethereumweb3.py

I am trying to filter Transfer events from my local ethereum node using web3 py. I have created a venv in visual studio code. My code is as follows:

def decodeLogswithfilter(t1, t2, abi1, addr):
    mycontract = geth.eth.contract(address=addr, abi=abi1)
    filter = mycontract.eventFilter(
        'Transfer', {'fromBlock': t1, 'toBlock': t2})
    eventlist = filter.get_all_entries
    print(eventlist)

decodeLogswithfilter(start, ending_block,
                         abi['result'], geth.toChecksumAddress(current_addr))

I have also tried using createFilter as well but it gives me the same error that Contract object has no attribute eventFilter.

Traceback (most recent call last):
  File "/mnt/ssd/erc721/queryBlockchain.py", line 150, in <module>
    abi['result'], geth.toChecksumAddress(current_addr))
  File "/mnt/ssd/erc721/queryBlockchain.py", line 71, in decodeLogswithfilter
    filter = mycontract.eventFilter(
AttributeError: 'Contract' object has no attribute 'eventFilter'

I have also tried upgrading my web3 package as suggested online, but the error didn't resolve.

Best Answer

Replace

filter = mycontract.eventFilter(
        'Transfer', {'fromBlock': t1, 'toBlock': t2})
eventlist = filter.get_all_entries

with

filter = mycontract.events.Transfer.createFilter(fromBlock=t1, toBlock=t2 )
filter.get_all_entries()

assuming Transfer is the eventname in solidity, This is for web3==5.5.1 version.

Related Solutions

Events – `web3.py`: AttributeError: ‘Contract’ Object Has No Attribute ‘eventFilter’

You're trying to use a v4 feature. Chances are good that you have v3 installed. To install the latest v4 version, use:

pip3 install --upgrade web3

Web3.py – Resolving AttributeError for ‘shh’ Object

For web3.py==5.x.x

GethShh

The web3.geth.shh object exposes methods to interact with the RPC APIs under the shh_ namespace.

For web3.py==4.x.x

=> We have to add the following line of code in order to fix the error for the web3.py:

from web3.shh import Shh
Shh.attach(web3, "shh")

=> We also have to add the following line for web3.js. Than use shh.

var Shh = require('web3-shh');   
var shh = new Shh(Shh.givenProvider || 'http://localhost:8545');

Please see following solution for web3.py:

from web3 import Web3, HTTPProvider
web3 = Web3(HTTPProvider('http://localhost:8545'))

from web3.shh import Shh  # Added line
Shh.attach(web3, "shh")   # Added line

# Now we call web3.shh as we would like:

# Example
print(web3.shh.version) #5.0
kId = web3.shh.newKeyPair();    
print(kId)
print(web3.shh.getPrivateKey(kId))
...

Please see following solution for web3.js:

$ npm install web3-shh

Example code:

web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:8545"));    
if(!web3.isConnected()){console.log("notconnected"); process.exit();}

var Shh = require('web3-shh');
// "Shh.providers.givenProvider" will be set if in an Ethereum supported browser.
var shh = new Shh(Shh.givenProvider || 'http://localhost:8545');

var kId = shh.newSymKey().then(console.log); //returns a valid value.

Best Answer

Related Solutions

Events – `web3.py`: AttributeError: ‘Contract’ Object Has No Attribute ‘eventFilter’

Web3.py – Resolving AttributeError for ‘shh’ Object

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