Add an internal _setApprovalForAll function (721 & 1155) (#2834)

Co-authored-by: Francisco Giordano <frangio.1@gmail.com>

CHANGELOG.md

@@ -6,6 +6,7 @@
  * `AccessControl`: add internal `_grantRole(bytes32,address)` and `_revokeRole(bytes32,address)`. ([#2568](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/#2568))
  * `AccessControl`: mark `_setupRole(bytes32,address)` as deprecated in favor of `_grantRole(bytes32,address)`. ([#2568](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/#2568))
  * `EIP712`: cache `address(this)` to immutable storage to avoid potential issues if a vanilla contract is used in a delegatecall context. ([#2852](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/#2852))
+ * Add internal `_setApprovalForAll` to `ERC721` and `ERC1155`. ([#2834](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/2834))
 
 ## 4.3.2 (2021-09-14)
 

contracts/token/ERC1155/ERC1155.sol

@@ -100,10 +100,7 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
      * @dev See {IERC1155-setApprovalForAll}.
      */
     function setApprovalForAll(address operator, bool approved) public virtual override {
-        require(_msgSender() != operator, "ERC1155: setting approval status for self");
+        _setApprovalForAll(_msgSender(), operator, approved);
-
-        _operatorApprovals[_msgSender()][operator] = approved;
-        emit ApprovalForAll(_msgSender(), operator, approved);
     }
 
     /**
@@ -369,6 +366,21 @@ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI {
         emit TransferBatch(operator, from, address(0), ids, amounts);
     }
 
+    /**
+     * @dev Approve `operator` to operate on all of `owner` tokens
+     *
+     * Emits a {ApprovalForAll} event.
+     */
+    function _setApprovalForAll(
+        address owner,
+        address operator,
+        bool approved
+    ) internal virtual {
+        require(owner != operator, "ERC1155: setting approval status for self");
+        _operatorApprovals[owner][operator] = approved;
+        emit ApprovalForAll(owner, operator, approved);
+    }
+
     /**
      * @dev Hook that is called before any token transfer. This includes minting
      * and burning, as well as batched variants.

contracts/token/ERC721/ERC721.sol

@@ -133,10 +133,7 @@ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
      * @dev See {IERC721-setApprovalForAll}.
      */
     function setApprovalForAll(address operator, bool approved) public virtual override {
-        require(operator != _msgSender(), "ERC721: approve to caller");
+        _setApprovalForAll(_msgSender(), operator, approved);
-
-        _operatorApprovals[_msgSender()][operator] = approved;
-        emit ApprovalForAll(_msgSender(), operator, approved);
     }
 
     /**
@@ -356,6 +353,21 @@ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
         emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
     }
 
+    /**
+     * @dev Approve `operator` to operate on all of `owner` tokens
+     *
+     * Emits a {ApprovalForAll} event.
+     */
+    function _setApprovalForAll(
+        address owner,
+        address operator,
+        bool approved
+    ) internal virtual {
+        require(owner != operator, "ERC721: approve to caller");
+        _operatorApprovals[owner][operator] = approved;
+        emit ApprovalForAll(owner, operator, approved);
+    }
+
     /**
      * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
      * The call is not executed if the target address is not a contract.