Add FV specification for ERC721 (#4104)

Co-authored-by: Ernesto García <ernestognw@gmail.com>
2023-04-12 05:29:36 +02:00
parent 661343f74c
commit 86f6eb2c9c
6 changed files with 677 additions and 0 deletions
--- a/certora/diff/token_ERC721_ERC721.sol.patch
+++ b/certora/diff/token_ERC721_ERC721.sol.patch
@ -0,0 +1,14 @@
+--- token/ERC721/ERC721.sol	2023-03-07 10:48:47.736822221 +0100
+++ token/ERC721/ERC721.sol	2023-03-09 19:49:39.669338673 +0100
+@@ -199,6 +199,11 @@
+         return _owners[tokenId];
+     }
+ 
+    // FV
+    function _getApproved(uint256 tokenId) internal view returns (address) {
+        return _tokenApprovals[tokenId];
+    }
+
+     /**
+      * @dev Returns whether `tokenId` exists.
+      *