Working with Polls

Make sure to implement the prerequisite code, or else the examples in this page will not work!

Prerequisite: Survey3ABI JSON file

When working with polls, and for some use-cases (the ones that import survey3ABI), you will need the below survey3ABI.json file saved in your project folder.

Make sure that you import that file in your code in order to achieve the wanted step (the samples already have the necessary import code).

survey3ABI.json

15KB

Open

Retrieve poll question

You can retrieve any poll question from Chiliz Chain, provided that you have the poll's contract address.

Before you run this blockchain call, you need to know the poll's ID.

You can use the GET /polls/ endpoint to retrieve it. See this documentation.

import { createPublicClient, http } from 'viem';
import survey3ABI from './survey3ABI.json';

const client = createPublicClient({
  transport: http('YOUR-RPC.com'),
});

const pollAddress = '0xPollAddress'; // Replace with the actual poll contract address

// Returns question text
async function getQuestion() {
  const question = await client.readContract({
    address: pollAddress, // Poll contract address
    abi: survey3ABI, // Poll conttract ABI
    functionName: 'question', // Function to retrieve the question
    args: [],
  });
  return question;
}

// Example usage
getQuestion().then(console.log);

Retrieve poll answers

You can retrieve all poll answers from Chiliz Chain, provided that you have the poll's contract address.

As of May 2025, you cannot retrieve poll answers media (such as pictures and videos) via this blockchain call.

To do that, you must use the Socios.com API GET /polls/ endpoint, documented here.

We are working on this for the next version of our survey smart contract. This is planned for end of 2025.

import { createPublicClient, http } from 'viem';
import survey3ABI from './survey3ABI.json';

const client = createPublicClient({
  transport: http('YOUR-RPC.com'),
});

const pollAddress = '0xPollAddress'; // Replace with the actual poll contract address

// Returns a list of answers with id, total votes and total amount of tokens used in votes
async function getAnswers() {
  const answers = await client.readContract({
    address: pollAddress, // Poll contract address
    abi: survey3ABI, // Poll conttract ABI
    functionName: 'getAnswers', // Function to retrieve the answers
    args: [],
  });
  return answers;
}

// Example usage
getAnswers().then(console.log);

Allow a user to vote on a poll

You can allow a logged-in user to vote a specific Socios.com poll.

We recommend to implement Reown's Wallet Kit (previously called WalletConnect) in order to have your users logged in via their web3 wallet. Once they are logged in, if they have a Fan Token of the team the poll belongs to, they will be able to vote on that poll.

We also recommend to check whether the user has a token or not before allowing them to vote, because if they don't, their vote will be rejected at the smart contract level.

Approve token staking

Prerequisite: erc20ABI JSON file

When approving token staking, you will need the below erc20ABI.json file saved in your project folder.

Make sure that you import that file in your code in order to achieve the wanted step (the samples already have the necessary import code).

ERC20ABI.json

21KB

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import { createWalletClient, privateKeyToAccount } from 'viem';
import erc20ABI from './erc20ABI.json';

const privateKey = '0xSenderPrivateKey'; // Replace with the sender's private key
const account = privateKeyToAccount(privateKey);
const walletClient = createWalletClient({
  account,
  transport: http('YOUR-RPC.com'),
});

async function approveTokens(stakingContractAddress) {
  const txHash = await walletClient.writeContract({
    address: '0xYourTokenAddress', // Replace with the ERC-20 token contract address
    abi: erc20ABI,
    functionName: 'approve', // Standard ERC-20 function to approve tokens
    args: [stakingContractAddress, BigInt(1e18)], // For 0 decimal tokens, use BigInt(1) for 1 token
  });
  return txHash;
}

// Example usage. Replace 0xStakingContractAddress with the actual staking smart contract address.
approveTokens('0xStakingContractAddress').then(console.log);

Your private key must only be used in server-side code. DO NOT release code on production with your private key shared on front-end side code.

Vote on poll

This is a code-based alternative to the POST /poll/{pollId}/vote endpoint, which was deprecated from the Socios.com API in Q1 2025.

import { createWalletClient, privateKeyToAccount } from 'viem';

const privateKey = '0xSenderPrivateKey'; // Replace with the sender's private key
const account = privateKeyToAccount(privateKey);
const walletClient = createWalletClient({
  account,
  transport: http('YOUR-RPC.com'),
});

async function vote(id, weight) {
  const txHash = await walletClient.writeContract({
    address: '0xPollAddress', // Replace with the poll contract address
    abi: survey3ABI, // Poll contract ABI
    functionName: 'vote', // Function to cast the vote
    args: [id, BigInt(weight)], // Replace 'id' with answer id and 'weight' with the amount of tokens that should be used to cast the vote
  });
  return txHash;
}

// Example usage
vote('dab3d446-959f-47e7-8789-f618d969de1e', 1).then(console.log);

Your private key must only be used in server-side code. DO NOT release code on production with your private key shared on front-end side code.

Retrieve user vote on a poll

You can know whether a user has already voted on a specific poll or not, and if they have then you can retrieve which answer they have selected.

This is a code-based alternative to the GET /poll/{pollId} endpoint, which was deprecated from the Socios.com API in Q1 2025.

import { createPublicClient, http, keccak256 } from 'viem';
import survey3ABI from './survey3ABI.json';

const client = createPublicClient({
  transport: http('YOUR-RPC.com'),
});
const pollAddress = '0xPollAddress'; // Replace with the actual poll contract address
const userAddress = '0xUserAddress'; // Replace with the user's wallet address

// Returns hashes of answerIds that the user voted on
async function getUserVoteHashes() {
  const votes = await client.readContract({
    address: pollAddress, // Poll contract address
    abi: survey3ABI, // Poll contract ABI
    functionName: 'getUserAnswers', // Function to retrieve the answers that the user voted on
    args: [userAddress], // User's address whose votes you want to fetch
  });
  return votes;
}

// Returns votes in plain text
async function getUserVotesPlainText() {
  // fetch all answers
  const answers = await client.readContract({
    address: pollAddress, // Poll contract address
    abi: survey3ABI, // Poll contract ABI
    functionName: 'getAnswers', // Function to retrieve the answers
    args: [], // User's address whose votes you want to fetch
  });

  // fetch user's votes
  const votes = await client.readContract({
    address: pollAddress, // Poll contract address
    abi: survey3ABI, // Poll conttract ABI
    functionName: 'getUserAnswers', // Function to retrieve the answers that the user voted on
    args: [userAddress], // User's address whose votes you want to fetch
  });

  // filter answers, return the ones that the user voted on
  const plainTextVotes = answers.filter(a => votes.includes(keccak256(a.id)));

  return plainTextVotes;
}

// Example usage
getUserVotesPlainText().then(console.log);
getUserVoteHashes().then(console.log);