Add export selectors on ERC20, ERC721 & ERC165

src/diamond/DiamondInspectFacet.sol

@@ -161,6 +161,11 @@ contract DiamondInspectFacet {
         }
     }
 
+    /**
+     * @notice Exports the function selectors of the DiamondInspectFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the DiamondInspectFacet
+     */
     function exportSelectors() external pure returns (bytes memory) {
         return bytes.concat(
             this.facetAddress.selector,

src/diamond/DiamondUpgradeFacet.sol

@@ -714,7 +714,12 @@ contract DiamondUpgradeFacet {
         }
     }
 
+    /**
+     * @notice Exports the function selectors of the DiamondUpgradeFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the DiamondUpgradeFacet
+     */
     function exportSelectors() external pure returns (bytes memory) {
-        return bytes.concat(DiamondUpgradeFacet.upgradeDiamond.selector);
+        return bytes.concat(this.upgradeDiamond.selector);
     }
 }

src/interfaceDetection/ERC165/ERC165Facet.sol

@@ -78,4 +78,13 @@ contract ERC165Facet {
 
         return s.supportedInterfaces[_interfaceId];
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC165Facet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC165Facet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.supportsInterface.selector);
+    }
 }

src/token/ERC20/Approve/ERC20ApproveFacet.sol

@@ -63,4 +63,13 @@ contract ERC20ApproveFacet {
         emit Approval(msg.sender, _spender, _value);
         return true;
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20ApproveFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20ApproveFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.approve.selector);
+    }
 }

src/token/ERC20/Bridgeable/ERC20BridgeableFacet.sol

@@ -212,4 +212,13 @@ contract ERC20BridgeableFacet {
             revert ERC20InvalidBridgeAccount(_caller);
         }
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20BridgeableFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20BridgeableFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.crosschainMint.selector, this.crosschainBurn.selector, this.checkTokenBridge.selector);
+    }
 }

src/token/ERC20/Burn/ERC20BurnFacet.sol

@@ -101,4 +101,13 @@ contract ERC20BurnFacet {
         }
         emit Transfer(_account, address(0), _value);
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20BurnFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20BurnFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.burnERC20.selector, this.burnERC20From.selector);
+    }
 }

src/token/ERC20/Data/ERC20DataFacet.sol

@@ -59,4 +59,13 @@ contract ERC20DataFacet {
     function allowance(address _owner, address _spender) external view returns (uint256) {
         return getStorage().allowance[_owner][_spender];
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20Data facet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20DataFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.totalSupply.selector, this.balanceOf.selector, this.allowance.selector);
+    }
 }

src/token/ERC20/Metadata/ERC20MetadataFacet.sol

@@ -56,4 +56,13 @@ contract ERC20MetadataFacet {
     function decimals() external view returns (uint8) {
         return getStorage().decimals;
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20Metadata facet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20MetadataFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.name.selector, this.symbol.selector, this.decimals.selector);
+    }
 }

src/token/ERC20/Permit/ERC20PermitFacet.sol

@@ -5,6 +5,11 @@ pragma solidity >=0.8.30;
  * https://compose.diamonds
  */
 
+/**
+ * @title ERC20PermitFacet
+ * @notice Facet for ERC20 permit functionality
+ * @dev Implements EIP-2612: https://eips.ethereum.org/EIPS/eip-2612
+ */
 contract ERC20PermitFacet {
     /**
      * @notice Thrown when a permit signature is invalid or expired.
@@ -177,4 +182,13 @@ contract ERC20PermitFacet {
         s.nonces[_owner] = currentNonce + 1;
         emit Approval(_owner, _spender, _value);
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20PermitFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20PermitFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.nonces.selector, this.DOMAIN_SEPARATOR.selector, this.permit.selector);
+    }
 }

src/token/ERC20/Transfer/ERC20TransferFacet.sol

@@ -133,4 +133,13 @@ contract ERC20TransferFacet {
         emit Transfer(_from, _to, _value);
         return true;
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC20TransferFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC20TransferFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.transfer.selector, this.transferFrom.selector);
+    }
 }

src/token/ERC721/Approve/ERC721ApproveFacet.sol

@@ -88,4 +88,13 @@ contract ERC721ApproveFacet {
         getStorage().isApprovedForAll[msg.sender][_operator] = _approved;
         emit ApprovalForAll(msg.sender, _operator, _approved);
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721ApproveFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721ApproveFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.approve.selector, this.setApprovalForAll.selector);
+    }
 }

src/token/ERC721/Burn/ERC721BurnFacet.sol

@@ -98,4 +98,13 @@ contract ERC721BurnFacet {
             emit Transfer(owner, address(0), tokenId);
         }
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721BurnFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721BurnFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.burnERC721.selector, this.burnERC721s.selector);
+    }
 }

src/token/ERC721/Data/ERC721DataFacet.sol

@@ -90,4 +90,15 @@ contract ERC721DataFacet {
     function isApprovedForAll(address _owner, address _operator) external view returns (bool) {
         return getStorage().isApprovedForAll[_owner][_operator];
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721DataFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721DataFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(
+            this.balanceOf.selector, this.ownerOf.selector, this.getApproved.selector, this.isApprovedForAll.selector
+        );
+    }
 }

src/token/ERC721/Enumerable/Burn/ERC721EnumerableBurnFacet.sol

@@ -122,4 +122,13 @@ contract ERC721EnumerableBurnFacet {
 
         emit Transfer(owner, address(0), _tokenId);
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721EnumerableBurnFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721EnumerableBurnFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.burn.selector);
+    }
 }

src/token/ERC721/Enumerable/Data/ERC721EnumerableDataFacet.sol

@@ -91,4 +91,13 @@ contract ERC721EnumerableDataFacet {
         }
         return s.allTokens[_index];
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721EnumerableDataFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721EnumerableDataFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.totalSupply.selector, this.tokenOfOwnerByIndex.selector, this.tokenByIndex.selector);
+    }
 }

src/token/ERC721/Enumerable/Transfer/ERC721EnumerableTransferFacet.sol

@@ -201,4 +201,17 @@ contract ERC721EnumerableTransferFacet {
             }
         }
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721EnumerableTransferFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721EnumerableTransferFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(
+            this.transferFrom.selector,
+            bytes4(keccak256("safeTransferFrom(address,address,uint256)")),
+            bytes4(keccak256("safeTransferFrom(address,address,uint256,bytes)"))
+        );
+    }
 }

src/token/ERC721/Metadata/ERC721MetadataFacet.sol

@@ -120,4 +120,13 @@ contract ERC721MetadataFacet {
         }
         return string.concat(s.baseURI, string(tokenIdString));
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721MetadataFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721MetadataFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(this.name.selector, this.symbol.selector, this.tokenURI.selector);
+    }
 }

src/token/ERC721/Transfer/ERC721TransferFacet.sol

@@ -167,4 +167,17 @@ contract ERC721TransferFacet {
             }
         }
     }
+
+    /**
+     * @notice Exports the function selectors of the ERC721TransferFacet
+     * @dev This function is use as a selector discovery mechanism for diamonds
+     * @return selectors The exported function selectors of the ERC721TransferFacet
+     */
+    function exportSelectors() external pure returns (bytes memory) {
+        return bytes.concat(
+            this.transferFrom.selector,
+            bytes4(keccak256("safeTransferFrom(address,address,uint256)")),
+            bytes4(keccak256("safeTransferFrom(address,address,uint256,bytes)"))
+        );
+    }
 }