# ISwapRouter

Router token swapping functionality

Functions for swapping tokens via Algebra

*Developer note: Credit to Uniswap Labs under GPL-2.0-or-later license: <https://github.com/Uniswap/v3-periphery>*

## Functions

### exactInputSingle

`function exactInputSingle(struct ISwapRouter.ExactInputSingleParams params) external payable returns (uint256 amountOut)` payable external

Swaps \`amountIn\` of one token for as much as possible of another token

| Name   | Type                                      | Description                                                                              |
| ------ | ----------------------------------------- | ---------------------------------------------------------------------------------------- |
| params | struct ISwapRouter.ExactInputSingleParams | The parameters necessary for the swap, encoded as \`ExactInputSingleParams\` in calldata |

**Returns:**

| Name      | Type    | Description                      |
| --------- | ------- | -------------------------------- |
| amountOut | uint256 | The amount of the received token |

### exactInput

`function exactInput(struct ISwapRouter.ExactInputParams params) external payable returns (uint256 amountOut)` payable external

Swaps \`amountIn\` of one token for as much as possible of another along the specified path

| Name   | Type                                | Description                                                                                  |
| ------ | ----------------------------------- | -------------------------------------------------------------------------------------------- |
| params | struct ISwapRouter.ExactInputParams | The parameters necessary for the multi-hop swap, encoded as \`ExactInputParams\` in calldata |

**Returns:**

| Name      | Type    | Description                      |
| --------- | ------- | -------------------------------- |
| amountOut | uint256 | The amount of the received token |

### exactOutputSingle

`function exactOutputSingle(struct ISwapRouter.ExactOutputSingleParams params) external payable returns (uint256 amountIn)` payable external

Swaps as little as possible of one token for \`amountOut\` of another token

| Name   | Type                                       | Description                                                                               |
| ------ | ------------------------------------------ | ----------------------------------------------------------------------------------------- |
| params | struct ISwapRouter.ExactOutputSingleParams | The parameters necessary for the swap, encoded as \`ExactOutputSingleParams\` in calldata |

**Returns:**

| Name     | Type    | Description                   |
| -------- | ------- | ----------------------------- |
| amountIn | uint256 | The amount of the input token |

### exactOutput

`function exactOutput(struct ISwapRouter.ExactOutputParams params) external payable returns (uint256 amountIn)` payable external

Swaps as little as possible of one token for \`amountOut\` of another along the specified path (reversed)

| Name   | Type                                 | Description                                                                                   |
| ------ | ------------------------------------ | --------------------------------------------------------------------------------------------- |
| params | struct ISwapRouter.ExactOutputParams | The parameters necessary for the multi-hop swap, encoded as \`ExactOutputParams\` in calldata |

**Returns:**

| Name     | Type    | Description                   |
| -------- | ------- | ----------------------------- |
| amountIn | uint256 | The amount of the input token |

### exactInputSingleSupportingFeeOnTransferTokens

`function exactInputSingleSupportingFeeOnTransferTokens(struct ISwapRouter.ExactInputSingleParams params) external returns (uint256 amountOut)` external

Swaps \`amountIn\` of one token for as much as possible of another along the specified path *Developer note: Unlike standard swaps, handles transferring from user before the actual swap.*

| Name   | Type                                      | Description                                                                                  |
| ------ | ----------------------------------------- | -------------------------------------------------------------------------------------------- |
| params | struct ISwapRouter.ExactInputSingleParams | The parameters necessary for the multi-hop swap, encoded as \`ExactInputParams\` in calldata |

**Returns:**

| Name      | Type    | Description                      |
| --------- | ------- | -------------------------------- |
| amountOut | uint256 | The amount of the received token |


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.algebra.finance/algebra-integral-documentation/algebra-v1-technical-reference/contracts/api-reference-v2.0-directional-fees/v2.0-directional-fees-periphery/iswaprouter.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.