Use signature request from cloud function?

Moralis General
#1

Hello,

My goal is to use Metamask as an alert system, to show that something relating to the contract has changed. Similar to how Moralis login requests a signature (except I have no need to verify that the request gets signed)

I have set up a cloud function with following code. I do not get an error, but I do not get a metamask alert either…

const web3 = Moralis.web3ByChain(‘0x89’)
const myContract = new web3.eth.Contract(ABI, contractAddress)
const owners = await myContract.methods.getOwners().call();

web3.eth.sign(“Message for owners”, “//This is a hardcoded address for the moment”);

return owners;

This code runs and returns owners, but web3.eth.sign() is either failing or not being called or not showing up on the wallet end.

THANKS!!!

#2

I also tried web3.eth.personal.sign(message, address) with the same results.

#3

who has to sign this message in cloud code? you hardcoded a private key somewhere?

#4

the getOwners() function returns addresses. Eventually I will try to parse that list and send messages to specific addresses from that function call. For now I hardcoded my address into there, I removed the address for this post

The real code uses an address like this FAKE one “0x45AB16f4b3Ac1789ghD0f453457eE8Da7780d3d8”

#6

You will need a private key if you want to sign something in cloud code.

#7

Sorry if I was confusing. I don’t want to sign anything in the cloud, I want to initiate a metamask signature popup from the cloud.

This works with JS on the client side, but not from the cloud function.
const web3 = new Web3(window.ethereum);
web3.eth.sign(web3.utils.sha3(‘Message’),‘0xXXXXXXXxxxxxxxxxxxxxxxxxxxXXXxxxxxx’);

I am assuming it is some type of safety issue with Metamask being active and connected. So far I don’t think this is going to work.

#8

Cloud code runs on a server, not in front end. You can not start a MetaMask pop up like that.

#9

Thanks, I think i misunderstood how the metamask alerts worked.