​
Wallet balance

It is useful to display the current wallet’s balance when a user wishes to deposit. The wallet balance can be retrieve using the following two methods:

​
balance

useDeposit returns a balance field which is equal to the current token balance of the wallet (ie balance not deposited). This balance will refresh by fetching from the chain again if token changes. 
const [token, setToken] = useState<API.TokenInfo>();
const { connectedChain } = useWalletConnector();

const {
  dst,
  balance, // The wallet balance of the chosen token
  allowance,
  approve,
  deposit,
  isNativeToken,
  balanceRevalidating,
  fetchBalance
} = useDeposit({
  address: token?.address,
  decimals: token?.decimals,
  srcToken: token?.symbol,
  srcChainId: Number(connectedChain?.id)
});

​
Fetch balance

useDeposit also has a fetchBalance() method to get the wallet balance. This can be used in a token list, and can be used to trigger a balance fetch directly. 
import { useDeposit } from "@orderly.network/hooks";

export const Example = () => {
  const {
    //...
    fetchBalance
  } = useDeposit({
    //...
  });

  const getBalance = async () => {
    const balance = await fetchBalance(`0x...`, 6);
  };

  //...
};

​
Wallet allowance

​
allowance

The current allowance authorized by the user to be used by the Orderly smart contract. This will refresh if the token is changed.

​
approve

Call the approve function to authorize an allowance of the token that can be used by the Orderly smart contract. If the quantity is not sent, the default will be ethers.MaxUint256. 
const {
  //...
  allowance,
  approve
} = useDeposit({
  //...
});

approve("<quantity?>");

​
Deposit fee

​
setQuantity

The setQuantity function is used to set the deposit quantity. This will trigger a recalculation of the deposit fee.
The setQuantity function is a React state dispatch function and must be called in a rendering tick before the function call to deposit happens.
const {
  //...
  depositFee,
  quantity,
  setQuantity,
  depositFeeRevalidating
} = useDeposit({
  //...
});

setQuantity("<quantity>");

​
depositFee

The depositFee field is the fee that needs to be paid when depositing. This will refresh if the quantity is updated.

​
Initiate deposit

​
deposit()

Call the deposit function from the response of useDeposit to initiate a deposit. 
const {
  //...
  deposit
} = useDeposit({
  //...
});

// Note: No parameters need to be passed during the call
const res = await deposit();