tasks: implement odos swap task

packages/tasks/contracts/interfaces/swap/IOdosV2Swapper.sol

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+pragma solidity >=0.8.0;
+
+import './IBaseSwapTask.sol';
+
+/**
+ * @dev Odos swapper task interface
+ */
+interface IOdosV2Swapper is IBaseSwapTask {
+    /**
+     * @dev Execution function
+     */
+    function call(address tokenIn, uint256 amountIn, uint256 slippage, bytes memory data) external;
+}

packages/tasks/contracts/swap/OdosV2Swapper.sol

@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+pragma solidity ^0.8.0;
+
+import '@mimic-fi/v3-helpers/contracts/math/FixedPoint.sol';
+import '@mimic-fi/v3-helpers/contracts/utils/BytesHelpers.sol';
+import '@mimic-fi/v3-connectors/contracts/interfaces/odos/IOdosV2Connector.sol';
+
+import './BaseSwapTask.sol';
+import '../interfaces/swap/IOdosV2Swapper.sol';
+
+/**
+ * @title Odos v2 swapper
+ * @dev Task that extends the base swap task to use Odos v2
+ */
+contract OdosV2Swapper is IOdosV2Swapper, BaseSwapTask {
+    using FixedPoint for uint256;
+    using BytesHelpers for bytes;
+
+    // Execution type for relayers
+    bytes32 public constant override EXECUTION_TYPE = keccak256('ODOS_V2_SWAPPER');
+
+    /**
+     * @dev Odos v2 swap config. Only used in the initializer.
+     */
+    struct OdosV2SwapConfig {
+        BaseSwapConfig baseSwapConfig;
+    }
+
+    /**
+     * @dev Initializes the Odos v2 swapper
+     * @param config Odos v2 swap config
+     */
+    function initialize(OdosV2SwapConfig memory config) external virtual initializer {
+        __OdosV2Swapper_init(config);
+    }
+
+    /**
+     * @dev Initializes the Odos v2 swapper. It does call upper contracts initializers.
+     * @param config Odos v2 swap config
+     */
+    function __OdosV2Swapper_init(OdosV2SwapConfig memory config) internal onlyInitializing {
+        __BaseSwapTask_init(config.baseSwapConfig);
+        __OdosV2Swapper_init_unchained(config);
+    }
+
+    /**
+     * @dev Initializes the Odos v2 swapper. It does not call upper contracts initializers.
+     * @param config Odos v2 swap config
+     */
+    function __OdosV2Swapper_init_unchained(OdosV2SwapConfig memory config) internal onlyInitializing {
+        // solhint-disable-previous-line no-empty-blocks
+    }
+
+    /**
+     * @dev Executes the Odos V2 swapper task
+     */
+    function call(address tokenIn, uint256 amountIn, uint256 slippage, bytes memory data)
+        external
+        override
+        authP(authParams(tokenIn, amountIn, slippage))
+    {
+        if (amountIn == 0) amountIn = getTaskAmount(tokenIn);
+        _beforeOdosV2Swapper(tokenIn, amountIn, slippage);
+
+        address tokenOut = getTokenOut(tokenIn);
+        uint256 price = _getPrice(tokenIn, tokenOut);
+        uint256 minAmountOut = amountIn.mulUp(price).mulUp(FixedPoint.ONE - slippage);
+        bytes memory connectorData = abi.encodeWithSelector(
+            IOdosV2Connector.execute.selector,
+            tokenIn,
+            tokenOut,
+            amountIn,
+            minAmountOut,
+            data
+        );
+
+        bytes memory result = ISmartVault(smartVault).execute(connector, connectorData);
+        _afterOdosV2Swapper(tokenIn, amountIn, slippage, tokenOut, result.toUint256());
+    }
+
+    /**
+     * @dev Before Odos v2 swapper hook
+     */
+    function _beforeOdosV2Swapper(address token, uint256 amount, uint256 slippage) internal virtual {
+        _beforeBaseSwapTask(token, amount, slippage);
+    }
+
+    /**
+     * @dev After Odos v2 swapper hook
+     */
+    function _afterOdosV2Swapper(
+        address tokenIn,
+        uint256 amountIn,
+        uint256 slippage,
+        address tokenOut,
+        uint256 amountOut
+    ) internal virtual {
+        _afterBaseSwapTask(tokenIn, amountIn, slippage, tokenOut, amountOut);
+    }
+}

packages/tasks/contracts/test/swap/OdosV2ConnectorMock.sol

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+pragma solidity ^0.8.0;
+
+contract OdosV2ConnectorMock {
+    event LogExecute(address tokenIn, address tokenOut, uint256 amountIn, uint256 minAmountOut, bytes data);
+
+    function execute(address tokenIn, address tokenOut, uint256 amountIn, uint256 minAmountOut, bytes memory data)
+        external
+        returns (uint256)
+    {
+        emit LogExecute(tokenIn, tokenOut, amountIn, minAmountOut, data);
+        return minAmountOut;
+    }
+}