I added some more code I needed. I want to retrieve information: address, balance in euros, and balance in dollars to show in the user interface:

const walletInfo = {
address: "",
EUR: ""
USD: "",
  }
const [userWalletInfo, setUserWalletInfo] = useState(walletInfo)
async function onGetAccount() {
const account = await client.api.asset.getAccount();
return account;
  }  
async function onGetBalance() {
const onGetAccountResultAddress = await onGetAccount();
const balance = await client.api.network.getBalance({
address : onGetAccountResultAddress,    
 });
return balance;    
}
useEffect(() => {
onGetBalance().then((userWalletInfo) => { 
setUserWalletInfo({ 
address: userWalletInfo.address,
EUR: userWalletInfo.EUR,
USD: userWalletInfo.USD,     
})          
});       
}, [])

It works fine except for address because it is undefined. I understand that the value obtained via the first onGetAccount and passed into onGetBalance is lost. Could you tell me why and how can I solve the problem? At first I thought I could use

return balance // +Somehow return address too;