Can I get a contract to vote on proposals via snapshot.js

[Leonard-Pat]

Hi everyone,

I'm a very new solidity developer and I was wondering if it would be possible for a contract to vote on a snapshot proposal. I know that only EOAs can sign transactions, however I wanted to see if there was a suitable work around? (For example am i able to delegate my vote to a contract). Ideally the voting power is taken from this contract rather than the actual user.

Thank you

[carlosnoesaavedra]

Good question. I'd be interested in hearing about this too

[Vipalone]

tôi cũng thấy câu hỏi rất xác thực, ai có ý kiến thì bình luận bên dưới nhé

[metrox-eth]

Yes, the way it work is that a contract can vote if it implement EIP-1271. On Snapshot a vote is a signed message, to verify a vote from a contract we call the function "isValidSignature" from that contract with the hash of the message and the signature. If that function return true then the vote is valid and can be casted / visible on Snapshot.

[ChaituVR]

Hey @Leonard-Pat web3 and account parameters are already defined in the above code, check those two variables. :)

[Leonard-Pat]

Hi yes, sorry i meant if a contract were to vote instead of an EOA, could it still be done using snapshot.js api and if so how ? (would web3 / account be that of a contract instead), if not how would one do it?

[ChaituVR]

@Leonard-Pat make sure your contract support EIP1271 to be able to vote with a contract

https://eips.ethereum.org/EIPS/eip-1271

[gzliudan]

If my contract supports EIP-1271, how to test it on web browser with MetaMask ?

contract Vote is IERC1271, Ownable {
    function isValidSignature(bytes32 hash, bytes memory signature) public view override returns (bytes4 magicValue) {
        return ECDSA.recover(hash, signature) == owner() ? this.isValidSignature.selector : bytes4(0);
    }
}

[BobJamesss]

Hi everyone. Once EIP-1271 is supported, how does the execution of the vote take place? What trigger's snapshots to call the isValidSignature view function on the contract?

[Turupawn]

@ChaituVR
I have the same problem, I implemented EIP 1271 and it's not working for me

This is my contract with EIP 1271 implemented:
https://optimistic.etherscan.io/address/0xcf9eea9e11f7ad18a14a8670C757f09043A524Bf#code

This is my core that is using snapshot.org js library

<h1>EIP 1271 snaptshot test</h1>

<input type="button" onclick="voteAsync()" value="vote!"></input>

<script src="https://cdn.ethers.io/lib/ethers-5.2.umd.min.js"
        type="application/javascript"></script>
<script src="https://cdn.jsdelivr.net/npm/@snapshot-labs/snapshot.js"></script>
<script>
async function voteAsync() {
    const provider = new ethers.providers.Web3Provider(window.ethereum)
    await provider.send("eth_requestAccounts", []);
    const signer = provider.getSigner()

    const hub = 'https://hub.snapshot.org'; // or https://testnet.snapshot.org for testnet
    const client = new snapshot.Client712(hub);

    const web3 = provider;
    // Smart Contract with EIP 1271 on Optimism
    const account = "0xcf9eea9e11f7ad18a14a8670C757f09043A524Bf"
    const receipt = await client.vote(web3, account, {
        space: 'opcollective.eth',
        proposal: '0x88583c43b196ec86cee45345611b582108f1d6933ab688a7cae992a6baa552a6',
        type: 'approval-voting',
        choice: 1,
        reason: 'Choice 1 make lot of sense',
        app: 'my-app'
    });
}
</script>

[Katarzynamm]

HEJ. JEST TAM KTOS LUDZKI??? PROSZĘ O KONTAKT niedz., 1 paź 2023, 02:01 użytkownik Ahmed Castro ***@***.***> napisał:

…

@ChaituVR <https://github.com/ChaituVR> I have the same problem, I implemented EIP 1271 and it doesn't work This is my contract with EIP 1271 implemented: https://optimistic.etherscan.io/address/0xcf9eea9e11f7ad18a14a8670C757f09043A524Bf#code This is my core that is using snapshot.org js library <h1>EIP 1271 snaptshot test</h1> <input type="button" onclick="voteAsync()" value="vote!"></input> <script src="https://cdn.ethers.io/lib/ethers-5.2.umd.min.js" type="application/javascript"></script> <script ***@***.***/snapshot.js"></script> <script> async function voteAsync() { const provider = new ethers.providers.Web3Provider(window.ethereum) await provider.send("eth_requestAccounts", []); const signer = provider.getSigner() const hub = 'https://hub.snapshot.org'; // or https://testnet.snapshot.org for testnet const client = new snapshot.Client712(hub); const web3 = provider; // Smart Contract with EIP 1271 on Optimism const account = "0xcf9eea9e11f7ad18a14a8670C757f09043A524Bf" const receipt = await client.vote(web3, account, { space: 'opcollective.eth', proposal: '0x88583c43b196ec86cee45345611b582108f1d6933ab688a7cae992a6baa552a6', type: 'approval-voting', choice: 1, reason: 'Choice 1 make lot of sense', app: 'my-app' }); } </script> — Reply to this email directly, view it on GitHub <#2949 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AUUANJSYIJFQK3JNPMVFY23X5CXFNANCNFSM555TDNYQ> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.*** com>