contract.on event listner

[hack3r-0m]

i want to use https://docs.ethers.io/v5/api/contract/contract/#Contract-on and listen to any event for any new incoming transactions on a given contract by subscribing over wss.

does it detect both eip-1559 & non eip-1559 transactions?
does it detect internal transactions ?
is there any timeout or is it bound by rpc provider regarding for how i can keep wss connection open ?
is it client agnostic ?

thanks, i am not able to find answers to these anywhere

[zemse]

does it detect both eip-1559 & non eip-1559 transactions?
does it detect internal transactions ?

contract.on is an event listener, it does not treat eip-1559 or non eip-1559 txs differently

An event is not necessarily emitted on event transactions, for example, normal ether transfers do not emit events. If your contract emits an event on every function it has then you can have a wildcard filter

const eventFilter = {
  address: '0x123',
  topics: []
}