add conduit preapproved

src/ERC721ContractMetadata.sol

@@ -7,6 +7,8 @@ import {
 
 import { ERC721A } from "ERC721A/ERC721A.sol";
 
+import { ERC721AConduitPreapproved } from "./lib/ERC721AConduitPreapproved.sol";
+
 import { TwoStepOwnable } from "utility-contracts/TwoStepOwnable.sol";
 
 import { IERC2981 } from "openzeppelin-contracts/interfaces/IERC2981.sol";
@@ -24,7 +26,7 @@ import {
  *         with additional metadata and ownership capabilities.
  */
 contract ERC721ContractMetadata is
-    ERC721A,
+    ERC721AConduitPreapproved,
     TwoStepOwnable,
     ISeaDropTokenContractMetadata
 {
@@ -63,7 +65,7 @@ contract ERC721ContractMetadata is
      * @notice Deploy the token contract with its name and symbol.
      */
     constructor(string memory name, string memory symbol)
-        ERC721A(name, symbol)
+        ERC721AConduitPreapproved(name, symbol)
     {}
 
     /**

src/lib/ERC721AConduitPreapproved.sol

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.17;
+
+import { ERC721A } from "ERC721A/ERC721A.sol";
+
+/**
+ * @title  ERC721AConduitPreapproved
+ * @notice ERC721A with the OpenSea conduit preapproved.
+ */
+abstract contract ERC721AConduitPreapproved is ERC721A {
+    /// @dev The canonical OpenSea conduit.
+    address internal constant _CONDUIT =
+        0x1E0049783F008A0085193E00003D00cd54003c71;
+
+    /**
+     * @notice Deploy the token contract.
+     *
+     * @param name              The name of the token.
+     * @param symbol            The symbol of the token.
+     */
+    constructor(
+        string memory name,
+        string memory symbol
+    ) ERC721A(name, symbol) {}
+
+    /**
+     * @dev Returns if the `operator` is allowed to manage all of the
+     *      assets of `owner`. Always returns true for the conduit.
+     */
+    function isApprovedForAll(
+        address owner,
+        address operator
+    ) public view virtual override returns (bool) {
+        if (operator == _CONDUIT) {
+            return true;
+        }
+        return ERC721A.isApprovedForAll(owner, operator);
+    }
+}