Monitor token transfers

Question

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

Answer 1

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/

The following example graph cryptokitties but you can add your contract and monitor it

Answer 2

You can use event. Solidity Event

Answer 3

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

Answer 4

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);
});