UniswapV3Factory

[
  {
    "inputs": [],
    "stateMutability": "nonpayable",
    "type": "constructor"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "uint24",
        "name": "fee",
        "type": "uint24"
      },
      {
        "indexed": true,
        "internalType": "int24",
        "name": "tickSpacing",
        "type": "int24"
      }
    ],
    "name": "FeeAmountEnabled",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "oldOwner",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "newOwner",
        "type": "address"
      }
    ],
    "name": "OwnerChanged",
    "type": "event"
  },
  {
    "anonymous": false,
    "inputs": [
      {
        "indexed": true,
        "internalType": "address",
        "name": "token0",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "address",
        "name": "token1",
        "type": "address"
      },
      {
        "indexed": true,
        "internalType": "uint24",
        "name": "fee",
        "type": "uint24"
      },
      {
        "indexed": false,
        "internalType": "int24",
        "name": "tickSpacing",
        "type": "int24"
      },
      {
        "indexed": false,
        "internalType": "address",
        "name": "pool",
        "type": "address"
      }
    ],
    "name": "PoolCreated",
    "type": "event"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "tokenA",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "tokenB",
        "type": "address"
      },
      {
        "internalType": "uint24",
        "name": "fee",
        "type": "uint24"
      }
    ],
    "name": "createPool",
    "outputs": [
      {
        "internalType": "address",
        "name": "pool",
        "type": "address"
      }
    ],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "uint24",
        "name": "fee",
        "type": "uint24"
      },
      {
        "internalType": "int24",
        "name": "tickSpacing",
        "type": "int24"
      }
    ],
    "name": "enableFeeAmount",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "uint24",
        "name": "",
        "type": "uint24"
      }
    ],
    "name": "feeAmountTickSpacing",
    "outputs": [
      {
        "internalType": "int24",
        "name": "",
        "type": "int24"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "",
        "type": "address"
      },
      {
        "internalType": "uint24",
        "name": "",
        "type": "uint24"
      }
    ],
    "name": "getPool",
    "outputs": [
      {
        "internalType": "address",
        "name": "",
        "type": "address"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "owner",
    "outputs": [
      {
        "internalType": "address",
        "name": "",
        "type": "address"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [],
    "name": "parameters",
    "outputs": [
      {
        "internalType": "address",
        "name": "factory",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "token0",
        "type": "address"
      },
      {
        "internalType": "address",
        "name": "token1",
        "type": "address"
      },
      {
        "internalType": "uint24",
        "name": "fee",
        "type": "uint24"
      },
      {
        "internalType": "int24",
        "name": "tickSpacing",
        "type": "int24"
      }
    ],
    "stateMutability": "view",
    "type": "function"
  },
  {
    "inputs": [
      {
        "internalType": "address",
        "name": "_owner",
        "type": "address"
      }
    ],
    "name": "setOwner",
    "outputs": [],
    "stateMutability": "nonpayable",
    "type": "function"
  }
]

// SPDX-License-Identifier: BUSL-1.1
pragma solidity =0.7.6;

import './interfaces/IUniswapV3Factory.sol';

import './UniswapV3PoolDeployer.sol';
import './NoDelegateCall.sol';

import './UniswapV3Pool.sol';

/// @title Canonical Uniswap V3 factory
/// @notice Deploys Uniswap V3 pools and manages ownership and control over pool protocol fees
contract UniswapV3Factory is IUniswapV3Factory, UniswapV3PoolDeployer, NoDelegateCall {
    /// @inheritdoc IUniswapV3Factory
    address public override owner;

    /// @inheritdoc IUniswapV3Factory
    mapping(uint24 => int24) public override feeAmountTickSpacing;
    /// @inheritdoc IUniswapV3Factory
    mapping(address => mapping(address => mapping(uint24 => address))) public override getPool;

    constructor() {
        owner = msg.sender;
        emit OwnerChanged(address(0), msg.sender);

        feeAmountTickSpacing[500] = 10;
        emit FeeAmountEnabled(500, 10);
        feeAmountTickSpacing[3000] = 60;
        emit FeeAmountEnabled(3000, 60);
        feeAmountTickSpacing[10000] = 200;
        emit FeeAmountEnabled(10000, 200);
    }

    /// @inheritdoc IUniswapV3Factory
    function createPool(
        address tokenA,
        address tokenB,
        uint24 fee
    ) external override noDelegateCall returns (address pool) {
        require(tokenA != tokenB);
        (address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
        require(token0 != address(0));
        int24 tickSpacing = feeAmountTickSpacing[fee];
        require(tickSpacing != 0);
        require(getPool[token0][token1][fee] == address(0));
        pool = deploy(address(this), token0, token1, fee, tickSpacing);
        getPool[token0][token1][fee] = pool;
        // populate mapping in the reverse direction, deliberate choice to avoid the cost of comparing addresses
        getPool[token1][token0][fee] = pool;
        emit PoolCreated(token0, token1, fee, tickSpacing, pool);
    }

    /// @inheritdoc IUniswapV3Factory
    function setOwner(address _owner) external override {
        require(msg.sender == owner);
        emit OwnerChanged(owner, _owner);
        owner = _owner;
    }

    /// @inheritdoc IUniswapV3Factory
    function enableFeeAmount(uint24 fee, int24 tickSpacing) public override {
        require(msg.sender == owner);
        require(fee < 1000000);
        // tick spacing is capped at 16384 to prevent the situation where tickSpacing is so large that
        // TickBitmap#nextInitializedTickWithinOneWord overflows int24 container from a valid tick
        // 16384 ticks represents a >5x price change with ticks of 1 bips
        require(tickSpacing > 0 && tickSpacing < 16384);
        require(feeAmountTickSpacing[fee] == 0);

        feeAmountTickSpacing[fee] = tickSpacing;
        emit FeeAmountEnabled(fee, tickSpacing);
    }
}