Create PiNexusGovernance.sol

contracts/PiNexusGovernance.sol

@@ -0,0 +1,31 @@
+pragma solidity ^0.8.0;
+
+import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol";
+
+contract PiNexusGovernance is SafeERC20 {
+    // Governance properties
+    uint256 public proposalThreshold;
+    uint256 public votingPeriod;
+
+    // Governance constructor
+    constructor() public {
+        proposalThreshold = 100;
+        votingPeriod = 7 days;
+    }
+
+    // Governance functions
+    function propose(string memory proposal) public {
+        // Propose a new governance proposal
+        _propose(msg.sender, proposal);
+    }
+
+    function vote(uint256 proposalId, bool support) public {
+        // Vote on a governance proposal
+        _vote(msg.sender, proposalId, support);
+    }
+
+    function executeProposal(uint256 proposalId) public {
+        // Execute a governance proposal
+        _executeProposal(proposalId);
+    }
+}