Create MathLib.sol

blockchain_integration/pi_network/pi-network-layer2-scaling/contracts/libraries/MathLib.sol

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+library MathLib {
+    // Safe addition
+    function safeAdd(uint256 a, uint256 b) internal pure returns (uint256) {
+        require(a + b >= a, "MathLib: addition overflow");
+        return a + b;
+    }
+
+    // Safe subtraction
+    function safeSub(uint256 a, uint256 b) internal pure returns (uint256) {
+        require(b <= a, "MathLib: subtraction underflow");
+        return a - b;
+    }
+
+    // Safe multiplication
+    function safeMul(uint256 a, uint256 b) internal pure returns (uint256) {
+        if (a == 0) {
+            return 0;
+        }
+        require(a * b / a == b, "MathLib: multiplication overflow");
+        return a * b;
+    }
+
+    // Safe division
+    function safeDiv(uint256 a, uint256 b) internal pure returns (uint256) {
+        require(b > 0, "MathLib: division by zero");
+        return a / b;
+    }
+
+    // Calculate the average of two numbers
+    function average(uint256 a, uint256 b) internal pure returns (uint256) {
+        return safeDiv(safeAdd(a, b), 2);
+    }
+
+    // Calculate the maximum of two numbers
+    function max(uint256 a, uint256 b) internal pure returns (uint256) {
+        return a >= b ? a : b;
+    }
+
+    // Calculate the minimum of two numbers
+    function min(uint256 a, uint256 b) internal pure returns (uint256) {
+        return a < b ? a : b;
+    }
+}