Working with Tokens

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

Retrieve user token balances

You can retrieve how many tokens of a specific type (ERC-20) a user holds in their wallet.

From there, you can create any scenario related to the balance. For instance, you can implement token-gating contents: giving access to certain content of your website only to holders of a certain token.

import { abi as erc20ABI } from './ERC20ABI.json';

const tokenAddress = '0xYourTokenAddress'; // Replace with the actual ERC-20 contract address
const userAddress = '0xUserWalletAddress'; // Replace with the user's wallet address

async function getTokenBalance() {
  const balance = await client.readContract({
    address: tokenAddress,
    abi: erc20ABI,
    functionName: 'balanceOf', // This is standard ERC-20 function to get balance
    args: [userAddress],
  });
  return balance.toString();
}

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

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Retrieve user CHZ balance

You can retrieve how many tokens of a specific native token a user has held in their wallet; for instance, CHZ on Chiliz Chain.

async function getNativeTokenBalance(address) {
  const balance = await client.getBalance({
    address,
  });
  return balance.toString();
}

// Example usage. Replace 0xUserWalletAddress with the actual user wallet address.
getNativeTokenBalance('0xUserWalletAddress').then(console.log);

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Send ERC-20 Tokens to a wallet

You can send any token held in your wallet to any other wallet.

This is a code-based alternative to the POST /admin/wallet/transfer/fan-token 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-CHOSEN-RPC-ENDPOINT.com'),
});

async function sendTokens(to, amount) {
  const txHash = await walletClient.writeContract({
    address: '0xYourTokenAddress', // Replace with the ERC-20 token contract address
    abi: erc20ABI,
    functionName: 'transfer', // Standard ERC-20 function to transfer tokens
    args: [to, BigInt(amount * 1e18)],
  });
  return txHash;
}

// Example usage. Replace 0xRecipientAddress with the actual recepient wallet address, and 10 with the exact amount to send.
sendTokens('0xRecipientAddress', 10).then(console.log);