ENS reverse lookup with lowercase address?

[ellis2323]

if you reverse 0xcf83b1c347c558923860bd19702d80e86ff81177 it returns Nothing.
if you reverse 0xCF83B1C347C558923860Bd19702D80e86ff81177 it returns ellis2323.eth

not sure if it was related to #269

The current fix is to convert to checksum address.

[ricmoo]

Hmm... Which network are you using? It works for me in both cases (the name hash algorithm lowercases everything, so that shouldn't matter as long as I'm using namehash internally).

/home/ricmoo> ethers
homestead> provider.lookupAddress("0xCF83B1C347C558923860Bd19702D80e86ff81177")
'ellis2323.eth'
homestead> provider.lookupAddress("0xcf83b1c347c558923860bd19702d80e86ff81177")
'ellis2323.eth'
homestead> 

[ellis2323]

I'm using ethers with infura provider. Not sure, it could be related to infura ?

let  conn = new ethers.providers.InfuraProvider('mainnet', token)
address = web3Utils.toChecksumAddress(address)
let name = await conn.lookupAddress(address)

[ricmoo]

Hmmm... I still can't reproduce it. Which version are you using?

> ethers.version
'4.0.27'
p = new ethers.providers.InfuraProvider()
> p.lookupAddress("0xCF83B1C347C558923860Bd19702D80e86ff81177").then(console.log)
Promise {
  <pending>,
  domain:
   Domain {
     domain: null,
     _events:
      { removeListener: [Function: updateExceptionCapture],
        newListener: [Function: updateExceptionCapture],
        error: [Function: debugDomainError] },
     _eventsCount: 3,
     _maxListeners: undefined,
     members: [] } }
> ellis2323.eth
> p.lookupAddress("0xcf83b1c347c558923860bd19702d80e86ff81177").then(console.log)
Promise {
  <pending>,
  domain:
   Domain {
     domain: null,
     _events:
      { removeListener: [Function: updateExceptionCapture],
        newListener: [Function: updateExceptionCapture],
        error: [Function: debugDomainError] },
     _eventsCount: 3,
     _maxListeners: undefined,
     members: [] } }
> ellis2323.eth

[ricmoo]

(also, ethers.utils.getAddress(address) will return the checksum address)

[ellis2323]

version: 4.0.27. I had replayed my unit tests and I cannot reproduce it.

[ellis2323]

Found the problem. Initially, I was using this code:

https://docs.ens.domains/dapp-developer-guide/resolving-names

With:

var address = '0x1234...';
var name = await ens.reverse(address);
// Check to be sure the reverse record is correct.
if(address != await ens.lookup(name)) {
name = null;
}

But it doesn't work if the address is not the Checksum version. I don't known how to contact them for this documentation.

My bad

[ricmoo]

Ah yes. Ethers always returns checksum addresses. You could do something like:

var address = ethers.utils.getAddress('0x1234...');

Which will checksum it from the beginning, so equality checks should pass. :)

[ellis2323]

Best regards, sorry for the trouble

[ricmoo]

No worries. Glad it all worked out. :)