ERC-20_onTransfer_example.js

const ethers = require('ethers');

async function app() {

    const abi = [
        'event Transfer(address indexed from, address indexed to, uint256 value)'
    ];
    
    const provider = new ethers.providers.JsonRpcProvider('https://data-seed-prebsc-1-s1.binance.org:8545/'); // BSC TESTNET

    const contract = new ethers.Contract('0x...ERC-20 contract_address...', abi, provider);
    
    const address = '0x...'; // our wallet address
    
    contract.on('Transfer', async function(from, to, value){
        if(to === address){
            console.log('Incoming from ', from, , 'to', to, 'amount', ethers.utils.formatUnits(value));
        }
    });
    
}

app();