# IUniswapV3Factory

## Overview

#### License: GPL-2.0-or-later

```solidity
interface IUniswapV3Factory
```

The Uniswap V3 Factory facilitates creation of Uniswap V3 pools and control over the protocol fees

## Events info

### OwnerChanged

```solidity
event OwnerChanged(address indexed oldOwner, address indexed newOwner)
```

Emitted when the owner of the factory is changed

Parameters:

| Name     | Type    | Description                            |
| -------- | ------- | -------------------------------------- |
| oldOwner | address | The owner before the owner was changed |
| newOwner | address | The owner after the owner was changed  |

### PoolCreated

```solidity
event PoolCreated(address indexed token0, address indexed token1, uint24 indexed fee, int24 tickSpacing, address pool)
```

Emitted when a pool is created

Parameters:

| Name        | Type    | Description                                                                       |
| ----------- | ------- | --------------------------------------------------------------------------------- |
| token0      | address | The first token of the pool by address sort order                                 |
| token1      | address | The second token of the pool by address sort order                                |
| fee         | uint24  | The fee collected upon every swap in the pool, denominated in hundredths of a bip |
| tickSpacing | int24   | The minimum number of ticks between initialized ticks                             |
| pool        | address | The address of the created pool                                                   |

### FeeAmountEnabled

```solidity
event FeeAmountEnabled(uint24 indexed fee, int24 indexed tickSpacing)
```

Emitted when a new fee amount is enabled for pool creation via the factory

Parameters:

| Name        | Type   | Description                                                                                |
| ----------- | ------ | ------------------------------------------------------------------------------------------ |
| fee         | uint24 | The enabled fee, denominated in hundredths of a bip                                        |
| tickSpacing | int24  | The minimum number of ticks between initialized ticks for pools created with the given fee |

## Functions info

### owner (0x8da5cb5b)

```solidity
function owner() external view returns (address)
```

Returns the current owner of the factory

Can be changed by the current owner via setOwner

Return values:

| Name | Type    | Description                      |
| ---- | ------- | -------------------------------- |
| \[0] | address | The address of the factory owner |

### feeAmountTickSpacing (0x22afcccb)

```solidity
function feeAmountTickSpacing(uint24 fee) external view returns (int24)
```

Returns the tick spacing for a given fee amount, if enabled, or 0 if not enabled

A fee amount can never be removed, so this value should be hard coded or cached in the calling context

Parameters:

| Name | Type   | Description                                                                             |
| ---- | ------ | --------------------------------------------------------------------------------------- |
| fee  | uint24 | The enabled fee, denominated in hundredths of a bip. Returns 0 in case of unenabled fee |

Return values:

| Name | Type  | Description      |
| ---- | ----- | ---------------- |
| \[0] | int24 | The tick spacing |

### getPool (0x1698ee82)

```solidity
function getPool(
    address tokenA,
    address tokenB,
    uint24 fee
) external view returns (address pool)
```

Returns the pool address for a given pair of tokens and a fee, or address 0 if it does not exist

tokenA and tokenB may be passed in either token0/token1 or token1/token0 order

Parameters:

| Name   | Type    | Description                                                                       |
| ------ | ------- | --------------------------------------------------------------------------------- |
| tokenA | address | The contract address of either token0 or token1                                   |
| tokenB | address | The contract address of the other token                                           |
| fee    | uint24  | The fee collected upon every swap in the pool, denominated in hundredths of a bip |

Return values:

| Name | Type    | Description      |
| ---- | ------- | ---------------- |
| pool | address | The pool address |

### createPool (0xa1671295)

```solidity
function createPool(
    address tokenA,
    address tokenB,
    uint24 fee
) external returns (address pool)
```

Creates a pool for the given two tokens and fee

tokenA and tokenB may be passed in either order: token0/token1 or token1/token0. tickSpacing is retrieved from the fee. The call will revert if the pool already exists, the fee is invalid, or the token arguments are invalid.

Parameters:

| Name   | Type    | Description                                     |
| ------ | ------- | ----------------------------------------------- |
| tokenA | address | One of the two tokens in the desired pool       |
| tokenB | address | The other of the two tokens in the desired pool |
| fee    | uint24  | The desired fee for the pool                    |

Return values:

| Name | Type    | Description                           |
| ---- | ------- | ------------------------------------- |
| pool | address | The address of the newly created pool |

### setOwner (0x13af4035)

```solidity
function setOwner(address _owner) external
```

Updates the owner of the factory

Must be called by the current owner

Parameters:

| Name    | Type    | Description                  |
| ------- | ------- | ---------------------------- |
| \_owner | address | The new owner of the factory |

### enableFeeAmount (0x8a7c195f)

```solidity
function enableFeeAmount(uint24 fee, int24 tickSpacing) external
```

Enables a fee amount with the given tickSpacing

Fee amounts may never be removed once enabled

Parameters:

| Name        | Type   | Description                                                                              |
| ----------- | ------ | ---------------------------------------------------------------------------------------- |
| fee         | uint24 | The fee amount to enable, denominated in hundredths of a bip (i.e. 1e-6)                 |
| tickSpacing | int24  | The spacing between ticks to be enforced for all pools created with the given fee amount |


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