Initial Commit

contracts/s_pricefeed.sol

@@ -0,0 +1,25 @@
+pragma solidity ^0.8.20;
+
+interface AggregatorV3Interface {
+    function latestRoundData() external view returns (
+        uint80 roundId,
+        int256 answer,
+        uint256 startedAt,
+        uint256 updatedAt,
+        uint80 answeredInRound
+    );
+}
+
+contract SPriceOracle {
+    AggregatorV3Interface public priceFeed;
+
+    constructor() {
+        priceFeed = AggregatorV3Interface(0x726D2E87d73567ecA1b75C063Bd09c1493655918);
+    }
+    /// @notice Returns the USD price of S in 1e18 based on API3
+    function getLatestPrice(address token) external view returns (uint256) {
+        (, int256 price,,,) = priceFeed.latestRoundData();
+        require(price > 0, "Invalid price from Chainlink");
+        return uint256(price);
+    }
+}

contracts/swapx_pricefeed.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import "@uniswap/v3-core/contracts/libraries/FullMath.sol";
+
+/// @notice Minimal interface for a Uniswap V3 pool (to access slot0)
+interface IUniswapV3Pool {
+    function safelyGetStateOfAMM()
+        external
+        view
+        returns (
+            uint160 sqrtPrice,  // The current sqrt(price) as a Q64.96 value
+            int24 tick,
+            uint16 lastFee,
+            uint8 pluginConfig,
+            uint128 activeLiquidity,
+            uint24 nextTick,
+            uint24 previousTick
+        );
+}
+
+/// @title USDC Quote for SWAPx
+/// @notice Returns the USDC price (scaled to 18 decimals) of 1 token,
+///         assuming a pool where token0 is USDC and token1 is the token of interest.
+///         The pool is hardcoded as well as the token addresses.
+contract UsdcQuoteV3 {
+    // Hardcoded addresses
+    address public constant POOL_ADDRESS = 0x467865E7Ce29E7ED8f362D51Fd7141117B234b44;
+    // token0 is USDC
+    address public constant USDC = 0x29219dd400f2Bf60E5a23d13Be72B486D4038894;
+    // token1 is the token to be priced (assumed to have 18 decimals)
+    address public constant TOKEN = 0xA04BC7140c26fc9BB1F36B1A604C7A5a88fb0E70;
+
+    // Constant representing 2^192 used for fixed‑point math
+    uint256 public constant Q192 = 2**192;
+
+    function getSqrtPrice() public view returns (uint256 price) {
+        IUniswapV3Pool pool = IUniswapV3Pool(POOL_ADDRESS);
+        (uint160 sqrtPrice,,,,,,) = pool.safelyGetStateOfAMM();
+
+        price = sqrtPrice;
+    }
+    /**
+     * @notice Returns the USDC price (scaled to 18 decimals) for exactly 1 TOKEN.
+     *
+     * @return amount18 The USDC amount (scaled to 18 decimals) per 1 TOKEN.
+     */
+    function getLatestPrice(address token) external view returns (uint256 amount18) {
+        uint256 sqrtPrice = getSqrtPrice();
+
+        uint256 numerator1 = uint256(sqrtPrice) * uint256(sqrtPrice);
+        uint256 directPrice = FullMath.mulDiv(numerator1, 10**6, 1 << 192);
+        require(directPrice > 0, "Direct price is zero");
+        amount18 = 1e36 / directPrice;
+
+    }
+
+}