# useApproveERC20

## Function: useApproveERC20()

> **useApproveERC20**(`tokenAddress`, `contractAddress`, `amount`?, `chainId`?, `enabled`?): `object`

A custom hook for managing ERC-20 token approval to a specific contract. This hook includes functionality to check the current allowance, simulate the approval transaction, execute the approval, and track its status.

### Parameters

#### tokenAddress

\`0x${string}\`

The address of the ERC-20 token to be approved.

#### contractAddress

\`0x${string}\`

The address of the contract to which the token is being approved.

#### amount?

`bigint`

The amount of tokens to approve. If not provided, it defaults to `0n`.

#### chainId?

`number`

The ID of the blockchain network where the ERC-20 token resides.

#### enabled?

`boolean` = `true`

A flag to enable or disable the hook's functionality. When `false`, all queries and actions are disabled.

### Returns

`object`

An object containing the following

#### allowance

> **allowance**: `undefined` | `bigint`

#### approve()

> **approve**: () => `void`

**Returns**

`void`

#### approveError

> **approveError**: `null` | `WriteContractErrorType`

#### approveLoading

> **approveLoading**: `boolean`

#### approveSuccess

> **approveSuccess**: `boolean`

#### approveTxLoading

> **approveTxLoading**: `boolean`

#### approveTxSuccess

> **approveTxSuccess**: `boolean`

### Defined in

[packages/wagmi/src/hook/useApproveERC20.tsx:19](https://github.com/haven1network/haven1-sdk/blob/df6267fec7b75040411529269f9c6a88e9c756ee/packages/wagmi/src/hook/useApproveERC20.tsx#L19)