Contract Source Code (Solidity)

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• interface IERC20
•    - function totalSupply()
•    - function balanceOf(address account)
•    - function transfer(address recipient, ...
•    - function allowance(address owner, add ...
•    - function approve(address spender, uin ...
•    - function transferFrom(address sender, ...
• interface IERC20Metadata is IERC20
•    - function name()
•    - function symbol()
•    - function decimals()
• interface ISolidlyV3Pool
•    - function slot0()
•    - function token0()
•    - function token1()
•  contract OffchainOracle *
•    - function getRate(address tokenFrom, a ...

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/**
 *Submitted for verification at SonicScan.org on 2025-01-23
*/

// SPDX-License-Identifier: No

pragma solidity 0.7.6;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}
// For Solidly v3
interface ISolidlyV3Pool {
    function slot0() external view returns (uint160 sqrtPriceX96, int24, uint24, bool);
    function token0() external view returns (address);
    function token1() external view returns (address);
}
contract OffchainOracle {
    function getRate(address tokenFrom, address tokenTo, address poolAddress, uint8 ver) external view returns (uint256 rate, uint8 decimalsFrom, uint8 decimalsTo) {
        // version = 3 : Solidly v3
        if(ver == 3) {
            address token0 = ISolidlyV3Pool(poolAddress).token0();
            address token1 = ISolidlyV3Pool(poolAddress).token1();
            (uint256 sqrtPriceX96,,,) = ISolidlyV3Pool(poolAddress).slot0();
            if(token0 == tokenFrom) {
                decimalsFrom = IERC20Metadata(token0).decimals();
                decimalsTo = IERC20Metadata(token1).decimals();
                rate = (((1e18 * sqrtPriceX96) >> 96) * sqrtPriceX96) >> 96;
            } else {
                decimalsFrom = IERC20Metadata(token1).decimals();
                decimalsTo = IERC20Metadata(token0).decimals();
                rate = (1e18 << 192) / sqrtPriceX96 / sqrtPriceX96;
            }
        }
    }
}

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[{"inputs":[{"internalType":"address","name":"tokenFrom","type":"address"},{"internalType":"address","name":"tokenTo","type":"address"},{"internalType":"address","name":"poolAddress","type":"address"},{"internalType":"uint8","name":"ver","type":"uint8"}],"name":"getRate","outputs":[{"internalType":"uint256","name":"rate","type":"uint256"},{"internalType":"uint8","name":"decimalsFrom","type":"uint8"},{"internalType":"uint8","name":"decimalsTo","type":"uint8"}],"stateMutability":"view","type":"function"}]

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