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Try this: web3.eth.getTransactionCount(addressFrom).then(txCount => { const newNonce = web3.utils.toHex(txCount) const transaction = new Tx({ ...txData, nonce: newNonce }, { chain: 'mainnet' }) transaction.sign(privateKey) const serializedTx = transaction.serialize().toString('hex') web3.eth.sendSignedTransaction('0x' + serializedTx) ...


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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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Ok. With this code the parts were errors might occur are very limited. Make sure providerUrl has the correct value. I hope you filled contractAddress correctly. Abi is the bigger problem. Do a console.log of it. I would suggest a JSON.parse on the abi. This might fix the problem. EDIT: What is your web3 version? Make sure not to use an outdated one.


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To connect to a blockchain you need a node which implements the blockchain functionality. Basically it's a client software. There are currently two major client platforms: Geth and Parity. It can be a bit cumbersome to run your own node but in theory anyone can do it. Infura is a service provider. They basically just provide you with access to one of the ...


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You are getting the error The method eth_newFilter does not exist/is not available because you are not using the websocket endpoint from Infura. the eth_newFilter call only exists on websockets. Change your Infura provider from: https://mainnet.infura.io/v3/YOUR-PROJECT-ID to: wss://mainnet.infura.io/ws/v3/YOUR-PROJECT-ID


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