> For the complete documentation index, see [llms.txt](https://docs.non-obvious.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.non-obvious.ai/sdks-guide/blockchain-sdks/tokenomics-sdk/approvevolary.md).

# approveVolary

## Description

The `approveVolary` function allows for the approval of a certain amount of tokens to be spent by another address, typically a smart contract. 

## Parameters

| Name         | Type   | Description                                            |
| ------------ | ------ | ------------------------------------------------------ |
| `spender`    | string | The address of the spender, typically a smart contract |
| `amount`     | string | The amount of tokens to approve for spending           |
| `privateKey` | string | The private key of the user's wallet                   |

## Response

| Property  | Type   | Description                                                                                                            |
| --------- | ------ | ---------------------------------------------------------------------------------------------------------------------- |
| `receipt` | object | A transaction receipt object that includes information about the transaction, such as the transaction hash and status. |

## Example Request and Response

### Prerequisites

Before making requests with NO.AI SDK, you must have it installed.

You can install NO.AI SDK using either **`npm`** or **`yarn`**. Use the following commands to install NO.AI SDK:

```jsx
npm install @nest25/tokenomics-lib
OR
yarn add @nest25/tokenomics-lib
```

### Request

Here is an example of how to make a `approveVolary` request using the NO.AI SDK:

```javascript
// import Nest SDK library
const { volary } = require('@nest25/tokenomics-lib');
// private key of the account you want to use
const TEST_PRIVATE_KEY = 'your-private-key';
// address of the staking contract
const STAKING_CONTRACT_ADDRESS = '0x077e4F1496693B7c45128c436eF933ccaFe6d291';

// create a new instance of staking
const Volary = new volary();

async function main() {
  // approve Volary to stake
  const result = await Volary.approveVolary(STAKING_CONTRACT_ADDRESS, '2', TEST_PRIVATE_KEY);
  // print the result
  console.log(result);
}
main();

```

### Response

```sh
{
        type: 2,
        chainId: 8888,
        nonce: 74,
        maxPriorityFeePerGas: BigNumber { _hex: '0x59682f00', _isBigNumber: true },
        maxFeePerGas: BigNumber { _hex: '0xd09dc300', _isBigNumber: true },
        gasPrice: null,
        gasLimit: BigNumber { _hex: '0x6983', _isBigNumber: true },
        to: '0x51d93eFc7a629C6c8e61de078d71b6E5c7F84B80',
        value: BigNumber { _hex: '0x00', _isBigNumber: true },
        data: '0x095ea7b3000000000000000000000000077e4f1496693b7c45128c436ef933ccafe6d2910000000000000000000000000000000000000000000000001bc16d674ec80000',
        accessList: [],
        hash: '0xd5a8ae72ae6a21babe3c0a025f7dfb05b4e0bd20c8870cd2220d5effe91ddc09',
        v: 1,
        r: '0xd5cfb759e73ed11e0efbb7e5fea3c5d56df6fe1c0e9db4d74d8f2fc4d184becf',
        s: '0x2938514e8e57b7c89af0515004f895ab81e38dc60792971a3f684fe959579cd4',
        from: '0x5712d28795106f0105C01e99A708d018C1d70E52',
        confirmations: 0,
        wait: [Function (anonymous)]
      }he
```

## Use Cases

* **DeFi Applications:** The function can be used by DeFi applications to approve the spending of a certain amount of tokens by a smart contract.
* **DEX Platforms:** The function can be used by DEX platforms to allow users to approve the spending of their tokens for trading on the platform.
* **Lending Platforms:** The function can be used by lending platforms to allow borrowers to approve the spending of their tokens as collateral.


---

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