feat: add spark incentives contract

contracts/mainnet/connectors/spark-rewards/events.sol

@@ -0,0 +1,13 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+contract Events {
+    event LogClaimed(
+        address[] assets,
+        uint256 amt,
+        uint256 getId,
+        uint256 setId
+    );
+
+    event LogAllClaimed(address[] assets, address[] rewards, uint256[] amts);
+}

contracts/mainnet/connectors/spark-rewards/helpers.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+import {DSMath} from "../../common/math.sol";
+import {Basic} from "../../common/basic.sol";
+import {SparkIncentivesInterface} from "./interface.sol";
+
+abstract contract Helpers is DSMath, Basic {
+    /**
+     * @dev Spark Incentives
+     */
+    SparkIncentivesInterface internal constant SPARK_INCENTIVES =
+        SparkIncentivesInterface(0x8164Cc65827dcFe994AB23944CBC90e0aa80bFcb);
+}

contracts/mainnet/connectors/spark-rewards/interface.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+interface SparkIncentivesInterface {
+    function claimRewards(
+        address[] calldata assets,
+        uint256 amount,
+        address to,
+        address reward
+    ) external returns (uint256);
+
+    function claimAllRewards(
+        address[] calldata assets,
+        address to
+    )
+        external
+        returns (address[] memory rewardsList, uint256[] memory claimedAmounts);
+}

contracts/mainnet/connectors/spark-rewards/main.sol

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+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.2;
+
+/**
+ * @title Spark Rewards.
+ * @dev Claim spark rewards.
+ */
+
+import {TokenInterface} from "../../common/interfaces.sol";
+import {Stores} from "../../common/stores.sol";
+import {Helpers} from "./helpers.sol";
+import {Events} from "./events.sol";
+
+abstract contract IncentivesConnector is Helpers, Events {
+    /**
+     * @dev Claim Pending Rewards.
+     * @notice Claim Pending Rewards from Spark incentives contract.
+     * @param assets The list of assets supplied and borrowed.
+     * @param amt The amount of reward to claim. (uint(-1) for max)
+     * @param reward The address of reward token to claim.
+     * @param getId ID to retrieve amt.
+     * @param setId ID stores the amount of rewards claimed.
+     */
+    function claim(
+        address[] calldata assets,
+        uint256 amt,
+        address reward,
+        uint256 getId,
+        uint256 setId
+    )
+        external
+        payable
+        returns (string memory _eventName, bytes memory _eventParam)
+    {
+        uint256 _amt = getUint(getId, amt);
+
+        require(assets.length > 0, "invalid-assets");
+
+        TokenInterface weth = TokenInterface(wethAddr);
+        uint256 wethAmountBefore = weth.balanceOf(address(this));
+
+        _amt = SPARK_INCENTIVES.claimRewards(
+            assets,
+            _amt,
+            address(this),
+            reward
+        );
+
+        uint256 wethAmountDiff = weth.balanceOf(address(this)) -
+            wethAmountBefore;
+        convertWethToEth(wethAmountDiff > 0, weth, wethAmountDiff);
+
+        setUint(setId, _amt);
+
+        _eventName = "LogClaimed(address[],uint256,uint256,uint256)";
+        _eventParam = abi.encode(assets, _amt, getId, setId);
+    }
+
+    /**
+     * @dev Claim All Pending Rewards.
+     * @notice Claim All Pending Rewards from Spark incentives contract.
+     * @param assets The list of assets supplied and borrowed.
+     */
+    function claimAll(
+        address[] calldata assets
+    )
+        external
+        payable
+        returns (string memory _eventName, bytes memory _eventParam)
+    {
+        require(assets.length > 0, "invalid-assets");
+        uint256[] memory _amts = new uint256[](assets.length);
+        address[] memory _rewards = new address[](assets.length);
+
+        TokenInterface weth = TokenInterface(wethAddr);
+        uint256 wethAmountBefore = weth.balanceOf(address(this));
+
+        (_rewards, _amts) = SPARK_INCENTIVES.claimAllRewards(
+            assets,
+            address(this)
+        );
+
+        uint256 wethAmountDiff = weth.balanceOf(address(this)) -
+            wethAmountBefore;
+        convertWethToEth(wethAmountDiff > 0, weth, wethAmountDiff);
+
+        _eventName = "LogAllClaimed(address[],address[],uint256[])";
+        _eventParam = abi.encode(assets, _rewards, _amts);
+    }
+}
+
+contract ConnectV2SparkIncentives is IncentivesConnector {
+    string public constant name = "Spark-Incentives-v1";
+}