How to get event's indexed argument value?

[0xSalman]

hi all,

Is there a way to get the actual value of the indexed argument of an event?

I have an event like this:

 event CreateIdentity(address indexed addr, string indexed username, string name, string twitter)

and I have this code that queries this event and logs the event arguments. I am getting the hashed value of username. Is there a way to get the actual value?

const filter = contract.filters.CreateIdentity()
return contract.queryFilter(filter, 0, 'latest')
  .then(events => {
    events.forEach((evt) => {
      const { addr, username, name, twitter } = evt.args
      console.log(chainId, addr, username, name, twitter)
    })
  })

I would really appreciate any help, thank you!!

[ricmoo]

It is impossible to get the value of an indexed value of a type that does not fit into a bytes32. The Solidity compiled code implements an indexed value (for types that do not fit in a single EVM word) by hashing it and using a LOG operation to inject it into a topic.

If you require a string to be both indexed and access to its value, the event must emit both; for example event Foo(string indexed searchUsername, string username) which the searchUsername would by available in the log topics (and hence can be filtered via a bloom filter), and the username would be available in the log data.

It’s a bit complex and requires an understanding of how the Solidity compiler actually encodes events and topics, but does that somewhat make sense?

[0xSalman]

ok, got it, thank you