git add.

README.md

@@ -1,5 +1,7 @@
 # Diamond-3-Hardhat Implementation
 
+![image](https://github.com/JohnDeveloperJ/diamond-3-hardhat/assets/143453887/2927e7e0-cfaf-45e9-8bff-dd64757bace7)
+
 This is an implementation for [EIP-2535 Diamond Standard](https://github.com/ethereum/EIPs/issues/2535). To learn about other implementations go here: https://github.com/mudgen/diamond
 
 The standard loupe functions have been gas-optimized in this implementation and can be called in on-chain transactions. However keep in mind that a diamond can have any number of functions and facets so it is still possible to get out-of-gas errors when calling loupe functions. Except for the `facetAddress` loupe function which has a fixed gas cost.

contracts/facets/ManagerFacet.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "../libraries/LibDiamond.sol";
+ // Import the necessary contracts and libraries
+
+/// @title FacetManager - A contract for managing facets in an EIP-2535 Diamond
+/// @author John Johnson
+/// @dev This contract provides functions for adding, replacing, and removing facets in an EIP-2535 compliant Diamond proxy.
+contract FacetManager {
+    // Address of the DiamondCutFacet
+    address internal diamondCutFacetAddress;
+
+    /// @dev Initializes the FacetManager with the address of the DiamondCutFacet.
+    /// @param _diamondCutFacetAddress The address of the DiamondCutFacet in the Diamond proxy.
+    constructor(address _diamondCutFacetAddress) {
+        diamondCutFacetAddress = _diamondCutFacetAddress;
+    }
+
+    /// @notice Adds a new facet to the Diamond proxy, associating it with the given function selectors.
+    /// @param facet The address of the new facet to add.
+    /// @param functionSelectors An array of function selectors to be associated with the facet.
+    /// @dev Only the owner is allowed to add facets.
+    function addFacet(address facet, bytes4[] memory functionSelectors) external {
+        // Ensure only authorized entities can call this function
+        require(msg.sender == owner(), "Only the owner can add facets");
+
+        IDiamondCut.FacetCutAction action = IDiamondCut.FacetCutAction.Add;
+
+        IDiamondCut.FacetCut[] memory cut = new IDiamondCut.FacetCut[](1);
+        cut[0] = IDiamondCut.FacetCut({
+            facetAddress: facet,
+            action: action,
+            functionSelectors: functionSelectors
+        });
+
+        bytes memory initData = abi.encodeWithSignature("diamondCut((address,uint8,bytes4[])[])", cut);
+
+        // Call the diamondCut function of DiamondCutFacet to add the new facet
+        (bool success, ) = diamondCutFacetAddress.call(initData);
+        require(success, "Facet addition failed");
+    }
+
+    // Add more functions to replace or remove facets as needed
+    // ...
+
+    /// @notice Returns the owner of the Diamond proxy.
+    /// @return The address of the Diamond proxy owner.
+    function owner() public view returns (address) {
+        return LibDiamond.contractOwner();
+    }
+}