Create pi_network_module_1: AccessControl.sol

blockchain_integration/pi_network/features/pi_network_smart_contract_architecture/pi_network_module_1: AccessControl.sol

@@ -0,0 +1,35 @@
+pragma solidity ^0.8.0;
+
+import "https://github.com/OpenZeppelin/openzeppelin-solidity/contracts/access/Roles.sol";
+
+contract AccessControl {
+    using Roles for address;
+
+    // Mapping of roles to addresses
+    mapping (address => Role) public roles;
+
+    // Enum for roles
+    enum Role { ADMIN, DEVELOPER, USER }
+
+    // Modifier to restrict access to admins
+    modifier onlyAdmin() {
+        require(roles[msg.sender] == Role.ADMIN, "Only admins can access this function");
+        _;
+    }
+
+    // Modifier to restrict access to developers
+    modifier onlyDeveloper() {
+        require(roles[msg.sender] == Role.DEVELOPER, "Only developers can access this function");
+        _;
+    }
+
+    // Function to add a new role
+    function addRole(address _address, Role _role) public onlyAdmin {
+        roles[_address] = _role;
+    }
+
+    // Function to remove a role
+    function removeRole(address _address) public onlyAdmin {
+        delete roles[_address];
+    }
+}