37 lines
1.4 KiB
Solidity
37 lines
1.4 KiB
Solidity
// 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/IUniswapV3Pool.sol';
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import './PoolAddress.sol';
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/// @notice Provides validation for callbacks from Uniswap V3 Pools
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library CallbackValidation {
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/// @notice Returns the address of a valid Uniswap V3 Pool
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/// @param factory The contract address of the Uniswap V3 factory
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/// @param tokenA The contract address of either token0 or token1
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/// @param tokenB The contract address of the other token
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/// @param fee The fee collected upon every swap in the pool, denominated in hundredths of a bip
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/// @return pool The V3 pool contract address
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function verifyCallback(
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address factory,
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address tokenA,
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address tokenB,
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uint24 fee
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) internal view returns (IUniswapV3Pool pool) {
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return verifyCallback(factory, PoolAddress.getPoolKey(tokenA, tokenB, fee));
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}
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/// @notice Returns the address of a valid Uniswap V3 Pool
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/// @param factory The contract address of the Uniswap V3 factory
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/// @param poolKey The identifying key of the V3 pool
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/// @return pool The V3 pool contract address
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function verifyCallback(address factory, PoolAddress.PoolKey memory poolKey)
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internal
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view
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returns (IUniswapV3Pool pool)
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{
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pool = IUniswapV3Pool(PoolAddress.computeAddress(factory, poolKey));
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require(msg.sender == address(pool));
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}
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}
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