ContractThatUsesOracle.sol

// SPDX-License-Identifier: MIT
pragma solidity 0.8.6;

interface v3oracle {
    function assetToAsset(address, uint, address, uint) external view returns (uint);
}

contract ContractThatUsesOracle {
    
    v3oracle constant oracle = v3oracle(0x0F1f5A87f99f0918e6C81F16E59F3518698221Ff);
    
    function functionThatUsesOracle() external returns (uint) {
        uint _twap = oracle.assetToAsset(TOKEN_FROM, TOKEN_FROM_AMOUNT, TOKEN_TO, TWAP_PERIOD);
        //uint _twap = oracle.assetToAsset(ETH, 1e18, DAI, 3600); ~ 1 ETH to DAI over last 30 minutes
        return _twap;
    }
}