1

I'd like to monitor the transfers of a certain ERC-20 token but so far I didn't find a way. I'm currently using web3.py. Any suggestion? Thanks

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One of the winners of the ETHWaterloo Hackaton last year (Nov 2017) was a team called Rufflet. They basically built a monitoring tools for smart contracts where you can watch functions & events triggered for a given smart contracts.

https://rufflet.cryptokitties.co/

enter image description here

The following example graph cryptokitties but you can add your contract and monitor it enter image description here

  • Very buggy. I added another smart contract, but it didn't even switch from CryptoKitties. I couldn't really select week, etc. Useless. – duality_ Jul 17 '18 at 5:45
  • how did that win a hackaton? The front-end was probably more work than the queries lol. – Nico Vergauwen Aug 25 '18 at 11:37
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If you're interested in monitoring token transfers for large amounts, or to/from an exchange I can suggest you to use aphrozeus. It's a website, that monitors token transfers in real-time and filters outlier transactions.

http://aphrozeus.com

  • Doesn't even load for me. – duality_ Jul 17 '18 at 5:43
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You can use event. Solidity Event

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https://web3js.readthedocs.io/en/1.0/web3-eth-contract.html#contract-events

myContract.events.MyEvent([options][, callback])

OR

https://web3js.readthedocs.io/en/1.0/web3-eth-subscribe.html

var subscription = web3.eth.subscribe('logs', {
    address: '0x123456..',
    topics: ['0x12345...']
}, function(error, result){
    if (!error)
        console.log(result);
});

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