feat: 🎸 add statistics events

src/v0.8/core/statistics/StatisticsBase.sol

@@ -24,6 +24,7 @@ import {Initializable} from "@openzeppelin/contracts-upgradeable/proxy/utils/Ini
 import {IStatistics} from "src/v0.8/interfaces/core/statistics/IStatistics.sol";
 import {StatisticsType} from "src/v0.8/types/StatisticsType.sol";
 import {StatisticsLIB} from "src/v0.8/core/statistics/library/StatisticsLIB.sol";
+import {StatisticsEvents} from "src/v0.8/shared/events/StatisticsEvents.sol";
 
 contract StatisticsBase is Initializable, IStatistics {
     using StatisticsLIB for StatisticsType.Statistics;
@@ -41,36 +42,72 @@ contract StatisticsBase is Initializable, IStatistics {
     /// @param _size Size to be added to the total count.
     function _addCountTotal(uint256 _size) internal {
         count.addTotal(_size);
+        emit StatisticsEvents.CountStatistics(
+            uint64(block.number),
+            count.total,
+            count.success,
+            count.failed
+        );
     }
 
     /// @notice Internal function to add to the total size in the statistics.
     /// @param _size Size to be added to the total size.
     function _addSizeTotal(uint256 _size) internal {
         size.addTotal(_size);
+        emit StatisticsEvents.SizeStatistics(
+            uint64(block.number),
+            count.total,
+            count.success,
+            count.failed
+        );
     }
 
     /// @notice Internal function to add to the success count in the statistics.
     /// @param _size Size to be added to the success count.
     function _addCountSuccess(uint256 _size) internal {
         count.addSuccess(_size);
+        emit StatisticsEvents.CountStatistics(
+            uint64(block.number),
+            count.total,
+            count.success,
+            count.failed
+        );
     }
 
     /// @notice Internal function to add to the success size in the statistics.
     /// @param _size Size to be added to the success size.
     function _addSizeSuccess(uint256 _size) internal {
         size.addSuccess(_size);
+        emit StatisticsEvents.SizeStatistics(
+            uint64(block.number),
+            count.total,
+            count.success,
+            count.failed
+        );
     }
 
     /// @notice Internal function to add to the failed count in the statistics.
     /// @param _size Size to be added to the failed count.
     function _addCountFailed(uint256 _size) internal {
         count.addFailed(_size);
+        emit StatisticsEvents.CountStatistics(
+            uint64(block.number),
+            count.total,
+            count.success,
+            count.failed
+        );
     }
 
     /// @notice Internal function to add to the failed size in the statistics.
     /// @param _size Size to be added to the failed size.
     function _addSizeFailed(uint256 _size) internal {
         size.addFailed(_size);
+        emit StatisticsEvents.SizeStatistics(
+            uint64(block.number),
+            count.total,
+            count.success,
+            count.failed
+        );
     }
 
     /// @notice Internal view function to retrieve the total count.

src/v0.8/shared/events/StatisticsEvents.sol

@@ -0,0 +1,50 @@
+/*******************************************************************************
+ *   (c) 2023 Dataswap
+ *
+ *  Licensed under the GNU General Public License, Version 3.0 or later (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      https://www.gnu.org/licenses/gpl-3.0.en.html
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ ********************************************************************************/
+
+// SPDX-License-Identifier: GPL-3.0-or-later
+pragma solidity ^0.8.21;
+
+library StatisticsEvents {
+    /**
+     * @dev Event triggered to record count statistics.
+     *
+     * @param _height The height of the statistics.
+     * @param _total The total count.
+     * @param _success The count of successful operations.
+     * @param _failed The count of failed operations.
+     */
+    event CountStatistics(
+        uint64 indexed _height,
+        uint256 _total,
+        uint256 _success,
+        uint256 _failed
+    );
+
+    /**
+     * @dev Event triggered to record size statistics.
+     *
+     * @param _height The height of the statistics.
+     * @param _total The total size.
+     * @param _success The size of successful operations.
+     * @param _failed The size of failed operations.
+     */
+    event SizeStatistics(
+        uint64 indexed _height,
+        uint256 _total,
+        uint256 _success,
+        uint256 _failed
+    );
+}