# IUniswapV3Router

[Git Source](https://github.com/Ion-Protocol/nucleus-boring-vault/blob/cc0b494b83e17b9b169a73b96050d2810b690477/src/interfaces/IUniswapV3Router.sol)

**Inherits:** IUniswapV3SwapCallback

Functions for swapping tokens via Uniswap V3

## Functions

### exactInputSingle

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

```solidity
function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);
```

**Parameters**

| Name     | Type                     | Description                                                                            |
| -------- | ------------------------ | -------------------------------------------------------------------------------------- |
| `params` | `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

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

```solidity
function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);
```

**Parameters**

| Name     | Type               | Description                                                                                |
| -------- | ------------------ | ------------------------------------------------------------------------------------------ |
| `params` | `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

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

```solidity
function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);
```

**Parameters**

| Name     | Type                      | Description                                                                             |
| -------- | ------------------------- | --------------------------------------------------------------------------------------- |
| `params` | `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

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

```solidity
function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
```

**Parameters**

| Name     | Type                | Description                                                                                 |
| -------- | ------------------- | ------------------------------------------------------------------------------------------- |
| `params` | `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 |

## Structs

### ExactInputSingleParams

```solidity
struct ExactInputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 amountOutMinimum;
    uint160 sqrtPriceLimitX96;
}
```

### ExactInputParams

```solidity
struct ExactInputParams {
    bytes path;
    address recipient;
    uint256 deadline;
    uint256 amountIn;
    uint256 amountOutMinimum;
}
```

### ExactOutputSingleParams

```solidity
struct ExactOutputSingleParams {
    address tokenIn;
    address tokenOut;
    uint24 fee;
    address recipient;
    uint256 deadline;
    uint256 amountOut;
    uint256 amountInMaximum;
    uint160 sqrtPriceLimitX96;
}
```

### ExactOutputParams

```solidity
struct ExactOutputParams {
    bytes path;
    address recipient;
    uint256 deadline;
    uint256 amountOut;
    uint256 amountInMaximum;
}
```


---

# 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.nucleusearn.io/nucleus-architecture/smart-contracts/contracts/interfaces/iuniswap-v3-router/iuniswapv3router.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.