Not able to bridge deployed ERC20 token through POS Bridge using Maticjs, getting this error "execution reverted: ERC20: approve to the zero address" - ethereum

Question

Here is my code, I have also added the options as well in the approve function which contains the from, to, gasLimit but that also doesn't work for me
const { POSClient, use } = require('#maticnetwork/maticjs');
const { Web3ClientPlugin } = require('#maticnetwork/maticjs-web3');
const HDWalletProvider = require('#truffle/hdwallet-provider');
require('dotenv').config();
use(Web3ClientPlugin);
async function getPOSClient() {
const posClient = new POSClient();
return await posClient.init({
network: 'testnet',
version: 'mumbai',
parent: {
provider: new HDWalletProvider(
process.env.PVT_KEY,
process.env.GOERLI_RPC
),
defaultConfig: {
from: process.env.FROM_ADDRESS,
},
},
child: {
provider: new HDWalletProvider(
process.env.PVT_KEY,
process.env.MUMBAI_RPC
),
defaultConfig: {
from: process.env.FROM_ADDRESS,
},
},
});
}
async function approveToken() {
const posClient = await getPOSClient();
// console.log('🚀 ~ file: index.js:36 ~ approveToken ~ posClient', posClient);
const erc20Token = posClient.erc20(process.env.ROOT_TOKEN, true);
const result = await erc20Token.approve('1000');
const txHash = await result.getTransactionHash();
console.log('txHash', txHash);
const receipt = await result.getReceipt();
console.log('receipt', receipt);
}
approveToken();
The error which I'm getting while approving the token,
Error: execution reverted: ERC20: approve to the zero address
0x08c379a00000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002245524332303a20617070726f766520746f20746865207a65726f2061646472657373000000000000000000000000000000000000000000000000000000000000
I have also mapped the token from polygon token mapper portal also. Please give your feedback

Answer 1

This error occurs when you are trying to approve an ERC20 token to the zero address.
Assuming the approve interface is approve(spender, amount)
I believe that if you add the approved address to this call const result = await erc20Token.approve(ADDRESS,'1000'); this issue will be resolved.