> For the complete documentation index, see [llms.txt](https://docs.dragonswap.app/dragonswap/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dragonswap.app/dragonswap/resources/developer-resources/smart-contracts/dragonswapv2/periphery/interfaces/iperipherypayments.md).

# IPeripheryPayments

Functions to ease deposits and withdrawals of SEI

### Functions[​](https://docs.uniswap.org/contracts/v3/reference/periphery/interfaces/IPeripheryPayments#functions) <a href="#functions" id="functions"></a>

#### unwrapWSEI[​](https://docs.uniswap.org/contracts/v3/reference/periphery/interfaces/IPeripheryPayments#unwrapweth9) <a href="#unwrapweth9" id="unwrapweth9"></a>

```solidity
  function unwrapWSEI(
    uint256 amountMinimum,
    address recipient
  ) external
```

Unwraps the contract's WSEI balance and sends it to recipient as SEI.

The amountMinimum parameter prevents malicious contracts from stealing WSEI from users.

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/periphery/interfaces/IPeripheryPayments#parameters)

| Name            | Type    | Description                          |
| --------------- | ------- | ------------------------------------ |
| `amountMinimum` | uint256 | The minimum amount of WSEI to unwrap |
| `recipient`     | address | The address receiving SEI            |

#### refundSEI[​](https://docs.uniswap.org/contracts/v3/reference/periphery/interfaces/IPeripheryPayments#refundeth) <a href="#refundeth" id="refundeth"></a>

```solidity
  function refundSEI(
  ) external
```

Refunds any SEI balance held by this contract to the `msg.sender`

Useful for bundling with mint or increase liquidity that uses ether, or exact output swaps that use ether for the input amount

#### sweepToken[​](https://docs.uniswap.org/contracts/v3/reference/periphery/interfaces/IPeripheryPayments#sweeptoken) <a href="#sweeptoken" id="sweeptoken"></a>

```solidity
  function sweepToken(
    address token,
    uint256 amountMinimum,
    address recipient
  ) external
```

Transfers the full amount of a token held by this contract to recipient

The amountMinimum parameter prevents malicious contracts from stealing the token from users

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/periphery/interfaces/IPeripheryPayments#parameters-1)

| Name            | Type    | Description                                                                |
| --------------- | ------- | -------------------------------------------------------------------------- |
| `token`         | address | The contract address of the token which will be transferred to `recipient` |
| `amountMinimum` | uint256 | The minimum amount of token required for a transfer                        |
| `recipient`     | address | The destination address of the token                                       |


---

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