# Gas Fees

#### `GET /withdrawals/estimate_network_fee` <a href="#get-withdrawals-estimate_network_fee" id="get-withdrawals-estimate_network_fee"></a>

```
const getEstimateNetworkFee = () => {
  const timestamp = Math.round(Date.now() / 1000)
  const payload = timestamp + 'GET' + '/withdrawals/estimate_network_fee' + '{}'
  const decodedSecret = Buffer.from(apiSecret, 'base64')
  const hmac = crypto.createHmac('sha256', decodedSecret)
  const signedPayload = hmac.update(payload).digest('base64')

  // SET HEADERS
  const headers = {
    'X-NDAX-API-KEY': 'public_key',
    'X-NDAX-SIGNED': signedPayload,
    'X-NDAX-TIMESTAMP': timestamp,
    'X-NDAX-PASSPHRASE': 'passphrase'
  }
  const options = {
    headers,
    body,
    json: true
  }

  return request.get(
    'https://api.ndax.in/withdrawals/estimate_network_fee',
    options
  )
}
```

> Sample Response

```
{
  "message": {
        "underlying": "BTC",
        "quoted_currency": "e₹",
        "network_fee_asset": "BTC",
        "network_fee_quantity": "0.000172825",
        "total_notional": "3.3733791241663290125"
    }
}
```

Retrive the estimate network fee. The following query parameters are **required**:

* `underlying`
* `quoted_currency`

Optional query parameters include:

* `amount` The amount of the `underlying` currency
* `destination_address` The destination\_address is the receiving address for the withdrawal request
* `contract_call` In a future release, this field will denote if the destination address is a smart contract address. False is the only acceptable value for now.

<table><thead><tr><th width="204">Parameter</th><th width="499.3333333333333">Description</th><th>Type</th></tr></thead><tbody><tr><td>underlying</td><td>The asset being valued</td><td>string</td></tr><tr><td>quoted_currency</td><td>The asset in which the <code>underlying</code> is being valued</td><td>string</td></tr><tr><td>network_fee_asset</td><td>The network fee asset</td><td>string</td></tr><tr><td>network_fee_quantity</td><td>The quantity of network fee</td><td>string</td></tr><tr><td>total_notional</td><td>fee_amount x (index price for fee_currency quoted in quoted_currency)</td><td>string</td></tr></tbody></table>