Another sign in question regarding metamask

ericnickus · September 23, 2021, 10:14am

I am curious as to why upon signing in with metamask , some other web3 helper (or call it whatever you want) like @usedapp/core only makes the user sign in to metamask , but moralis requires a signature’ . I need to further invesigate , I know I am a bit ignorant at this point, but I really like moralis, but like the way usedapp seems to just make you open metamask normally but moralis seems to require an additional signature. What transaction are they signing ?

Please correct me if I am wrong, and I appreciate your wisdom more than you could even know. If you have an address to donate to I would , you guys are so quick to reply.

cryptokid · September 23, 2021, 10:19am

This question is related to mobile or to a normal web browser with metamask plugin installed?

ericnickus · September 23, 2021, 10:35am

Firefox 92.0 from Imac mac OS BigSur (please don’t tell me it’s another BigSur headache lol?)

I’m guessing it’s because a regular sign in only returns the account address as far as I can see with used app so there must be some transaction to get all the metadata from metamask or something ;?\

cryptokid · September 23, 2021, 10:37am

I think that Moralis also creates a user in its database where it validates it with a signature.

github.com

MoralisWeb3/Moralis-JS-SDK/blob/8d58cb893d1f4ad363267787a20a795c486e7be8/src/MoralisWeb3.js#L102-L115


  const signature = await web3.eth.personal.sign(data, ethAddress, '');
  if (!signature) throw new Error('Data not signed');
  const authData = { id: ethAddress, signature, data };
  const user = await ParseUser.logInWith('moralisEth', { authData });
  await user.setACL(new ParseACL(user));
  if (!user) throw new Error('Could not get user');
  user.set('accounts', uniq([].concat(accountsLower, user.get('accounts') ?? [])));
  user.set('ethAddress', ethAddress);
  await user.save(null, options);
  return user;
}
static async link(account, options) {
  const web3 = await MoralisWeb3.enable(options);
  const data = MoralisWeb3.getSigningData();