> ## Documentation Index
> Fetch the complete documentation index at: https://docs.rubic.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Prevent dangerous routes

> How to prevent swaps via routes with high slippage or price impact

In `/quote` and `/quoteBest` you can pass a parameter `showDangerousRoutes: false` to filter routes with priceImpact more than -5% and less than +20% and slippage more than 20%(slippage: 0.2). Price impact is estimated as:

```javascript theme={null}
srcTokenAmountInUsd = srcTokenAmount * srcTokenPrice
dstTokenAmountInUsd = dstTokenAmount * dstTokenPrice
priceImpact = ((srcTokenAmountInUsd - dstTokenAmountInUsd) / dstTokenAmountInUsd) * 100
```

By default `showDangerousRoutes` is optional property and set to `false`.

If you pass `showDangerousRoutes: true` - you will receive in response every route that was successully found in spite of priceImpact and slippage values.

Example of request to show only safe routes:

```javascript theme={null}
{
    "dstTokenAddress":"0x1f9840a85d5af5bf1d1762f925bdaddc4201f984",
    "dstTokenBlockchain":"ETH",
    "integratorAddress":"0x3019BD6BA7CEE183298385958dDE8d67DfCc2340",
    "referrer":"arbitragescanner",
    "srcTokenAddress":"0xdac17f958d2ee523a2206206994597c13d831ec7",
    "srcTokenAmount":"100000000",
    "srcTokenBlockchain":"ETH",
    "showDangerousRoutes": false
}
```