# Reference: `sushi/evm` DEX

The DEX module contains small domain enums and DEX math errors.

| Export | Purpose |
|---|---|
| `Fee` | Fee enum used by DEX logic. |
| `PoolType` | Pool type enum. |
| `TradeType` | Exact input/exact output trade type. |
| `InsufficientReservesError` | Error for insufficient reserves. |
| `InsufficientInputAmountError` | Error for insufficient input amount. |

```ts
import { InsufficientInputAmountError } from 'sushi/evm'

const error = new InsufficientInputAmountError()

if (error instanceof InsufficientInputAmountError) {
  console.log('Input amount is too small')
}
```