Fix [Q-12] Comply with ERC7201 standard

thirdweb-dev · Sep 26, 2023 · c38d61c · c38d61c
1 parent 1e532c0
commit c38d61c
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/contracts/prebuilts/unaudited/burn-to-claim-drop/extension/BurnToClaimDrop721Storage.sol b/contracts/prebuilts/unaudited/burn-to-claim-drop/extension/BurnToClaimDrop721Storage.sol
@@ -2,7 +2,9 @@
 pragma solidity ^0.8.0;
 
 library BurnToClaimDrop721Storage {
-    bytes32 public constant BURN_TO_CLAIM_DROP_721_STORAGE_POSITION = keccak256("burn.to.claim.drop.721.storage");
+    /// @custom:storage-location erc7201:burn.to.claim.drop.721.storage
+    bytes32 public constant BURN_TO_CLAIM_DROP_721_STORAGE_POSITION =
+        keccak256(abi.encode(uint256(keccak256("burn.to.claim.drop.721.storage")) - 1));
 
     struct Data {
         /// @dev Global max total NFTs that can be minted.