Added Access Control Contract.

contracts/InstaAccess.sol

@@ -0,0 +1,115 @@
+pragma solidity ^0.5.2;
+
+
+/// @title Owners
+/// @notice
+/// @dev
+contract Owners {
+    event LogAddOwner(address addr);
+    event LogRemoveOwner(address addr);
+
+    /// @notice owners of the contracts
+    mapping(address => bool) public owners;
+    uint public ownersCount;
+
+    /**
+     * @dev Check if msg.sender is owner.
+     */
+    modifier onlyOwner() {
+        require(isOwner(msg.sender), "permission-denied");
+        _;
+    }
+
+    /// @dev Check if is owner.
+    /// @param _owner (address)
+    function isOwner(address _owner) public view returns (bool) {
+        return owners[_owner];
+    }
+
+    /// @dev add new owner
+    /// @param _owner (address)
+    function addOwner(address _owner) public onlyOwner {
+        owners[_owner] = true;
+        ownersCount++;
+    }
+
+    /// @dev removed existing owner
+    /// @param _owner (address)
+    function removeOwner(address _owner) public onlyOwner {
+        owners[_owner] = false;
+        ownersCount--;
+        require(ownersCount > 0, "zero-owner-not-allowed");
+    }
+}
+
+
+/// @title Managers
+/// @notice
+/// @dev
+contract Managers is Owners {
+    event LogAddManager(address addr);
+    event LogRemoveManager(address addr);
+
+    /// @notice managers of the contracts
+    mapping(address => bool) public managers;
+
+    /// @dev Check if manager.
+    /// @param _manager (address)
+    function isManager(address _manager) public view returns (bool) {
+        return managers[_manager];
+    }
+
+    /// @dev add new manager
+    /// @param _manager (address)
+    function addManager(address _manager) public onlyOwner {
+        managers[_manager] = true;
+    }
+
+    /// @dev removed existing manager
+    /// @param _manager (address)
+    function removeManager(address _manager) public onlyOwner {
+        managers[_manager] = false;
+    }
+}
+
+
+/// @title Guardians
+/// @notice
+/// @dev
+contract Guardians is Managers {
+    event LogAddGuardian(address addr);
+    event LogRemoveGuardian(address addr);
+
+    /// @notice guardians of the contracts
+    mapping(address => bool) public guardians;
+
+    /// @dev Check if guardian
+    /// @param _guardians (address)
+    function isGuardian(address _guardians) public view returns (bool) {
+        return guardians[_guardians];
+    }
+
+    /// @dev add new guardian
+    /// @param _guardians (address)
+    function addGuardian(address _guardians) public onlyOwner {
+        guardians[_guardians] = true;
+    }
+
+    /// @dev removed existing guardian
+    /// @param _guardians (address)
+    function removeGuardian(address _guardians) public onlyOwner {
+        guardians[_guardians] = false;
+    }
+}
+
+
+/// @title InstaAccess
+/// @dev Initializing Access Control
+contract InstaAccess is Guardians {
+
+    constructor() public {
+        owners[msg.sender] = true;
+        ownersCount++;
+    }
+
+}