33 lines
1.2 KiB
Solidity
33 lines
1.2 KiB
Solidity
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// SPDX-License-Identifier: GPL-2.0-or-later
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pragma solidity =0.7.6;
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import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Factory.sol';
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import '@uniswap/v3-core/contracts/interfaces/IUniswapV3Pool.sol';
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import './PeripheryImmutableState.sol';
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import '../interfaces/IPoolInitializer.sol';
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/// @title Creates and initializes V3 Pools
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abstract contract PoolInitializer is IPoolInitializer, PeripheryImmutableState {
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/// @inheritdoc IPoolInitializer
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function createAndInitializePoolIfNecessary(
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address token0,
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address token1,
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uint24 fee,
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uint160 sqrtPriceX96
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) external payable override returns (address pool) {
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require(token0 < token1);
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pool = IUniswapV3Factory(factory).getPool(token0, token1, fee);
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if (pool == address(0)) {
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pool = IUniswapV3Factory(factory).createPool(token0, token1, fee);
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IUniswapV3Pool(pool).initialize(sqrtPriceX96);
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} else {
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(uint160 sqrtPriceX96Existing, , , , , , ) = IUniswapV3Pool(pool).slot0();
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if (sqrtPriceX96Existing == 0) {
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IUniswapV3Pool(pool).initialize(sqrtPriceX96);
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}
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}
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}
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}
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