feat: add susds spark psm connector

contracts/base/connectors/susds/events.sol

@@ -0,0 +1,17 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+contract Events {
+    event LogSwapExactIn(
+        address assetIn,
+        uint256 amountIn,
+        uint256 getId,
+        uint256 setId
+    );
+    event LogSwapExactOut(
+        address assetOut,
+        uint256 amountOut,
+        uint256 getId,
+        uint256 setId
+    );
+}

contracts/base/connectors/susds/helpers.sol

@@ -0,0 +1,14 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+import "./interface.sol";
+
+contract Helpers {
+    uint256 internal constant referralCode = 1006;
+
+    address internal constant SUSDSAddr =
+        0x5875eEE11Cf8398102FdAd704C9E96607675467a;
+
+    ISparkPSM3 internal SparkPSM3 =
+        ISparkPSM3(0x1601843c5E9bC251A3272907010AFa41Fa18347E);
+}

contracts/base/connectors/susds/interface.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+interface ISparkPSM3 {
+    function deposit(
+        address asset,
+        address receiver,
+        uint256 assetsToDeposit
+    ) external returns (uint256 newShares);
+
+    function withdraw(
+        address asset,
+        address receiver,
+        uint256 maxAssetsToWithdraw
+    ) external returns (uint256 assetsWithdrawn);
+
+    function swapExactIn(
+        address assetIn,
+        address assetOut,
+        uint256 amountIn,
+        uint256 minAmountOut,
+        address receiver,
+        uint256 referralCode
+    ) external returns (uint256 amountOut);
+
+    function swapExactOut(
+        address assetIn,
+        address assetOut,
+        uint256 amountOut,
+        uint256 maxAmountIn,
+        address receiver,
+        uint256 referralCode
+    ) external returns (uint256 amountIn);
+
+    function previewSwapExactIn(
+        address assetIn,
+        address assetOut,
+        uint256 amountIn
+    ) external view returns (uint256 amountOut);
+
+    function previewSwapExactOut(
+        address assetIn,
+        address assetOut,
+        uint256 amountOut
+    ) external view returns (uint256 amountIn);
+}

contracts/base/connectors/susds/main.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+/**
+ * @title SUSDS Connectors.
+ * @dev Interface for Spark PSM3 contract for DSA.
+ */
+
+import "./helpers.sol";
+import {Basic} from "../../common/basic.sol";
+import {TokenInterface} from "../../common/basic.sol";
+
+contract SUSDSConnector is Helpers, Basic {
+    /**
+     * 
+     * @param assetAddr Address of the asset to swap (e.g. USDS, USDC)
+     * @param amountIn Amount of asset to swap in (e.g. USDS, USDC amount)
+	 * @param getId ID to retrieve amount.
+	 * @param setId ID stores the amount of tokens swapped in.
+     */
+    function swapExactIn(
+        address assetAddr,
+        uint256 amountIn,
+        uint256 getId,
+        uint256 setId
+    ) external returns (string memory _eventName, bytes memory _eventParam) {
+        uint256 _amountIn = getUint(getId, amountIn);
+
+        _amountIn = _amountIn == type(uint256).max
+            ? TokenInterface(assetAddr).balanceOf(address(this))
+            : _amountIn;
+
+        approve(TokenInterface(assetAddr), address(SparkPSM3), _amountIn);
+
+        uint256 minAmountOut = SparkPSM3.previewSwapExactIn(
+            assetAddr,
+            SUSDSAddr,
+            _amountIn
+        );
+
+        SparkPSM3.swapExactIn(
+            assetAddr,
+            SUSDSAddr,
+            _amountIn,
+            minAmountOut,
+            address(this),
+            referralCode
+        );
+
+        setUint(setId, _amountIn);
+
+        _eventName = "LogSwapExactIn(address,uint256,uint256,uint256)";
+        _eventParam = abi.encode(assetAddr, SUSDSAddr, _amountIn, getId);
+    }
+
+    /**
+     * 
+     * @param assetAddr Address of the asset to swap (e.g. USDS, USDC)
+     * @param amountOut Amount of asset to swap out (e.g. USDS, USDC amount)
+	 * @param getId ID to retrieve amount.
+	 * @param setId ID stores the amount of tokens swapped out.
+     */
+    function swapExactOut(
+        address assetAddr,
+        uint256 amountOut,
+        uint256 getId,
+        uint256 setId
+    ) external returns (string memory _eventName, bytes memory _eventParam) {
+        uint256 _amountOut = getUint(getId, amountOut);
+
+        _amountOut = _amountOut == type(uint256).max
+            ? TokenInterface(assetAddr).balanceOf(address(this))
+            : _amountOut;
+
+        uint256 maxAmountIn = SparkPSM3.previewSwapExactOut(
+            assetAddr,
+            SUSDSAddr,
+            _amountOut
+        );
+
+        approve(TokenInterface(SUSDSAddr), address(SparkPSM3), maxAmountIn);
+
+        SparkPSM3.swapExactOut(
+            SUSDSAddr,
+            assetAddr,
+            _amountOut,
+            maxAmountIn,
+            address(this),
+            referralCode
+        );
+
+        setUint(setId, _amountOut);
+
+        _eventName = "LogSwapExactOut(address,uint256,uint256,uint256)";
+        _eventParam = abi.encode(assetAddr, SUSDSAddr, _amountOut, getId);
+    }
+}
+
+contract ConnectV2SUSDSBase is SUSDSConnector {
+    string public constant name = "SUSD-Base-v1.0";
+}