OpenZeppelin 发布 Solidity Contracts v5.3

According to Foresight News, OpenZeppelin, a secure blockchain application standard, has released Solidity Contracts v5.3. The core highlights include the new multi token standard ERC-6909, which has minimal implementation, metadata support, supply tracking, and content URI extension; Including new proposal guardian roles, addition of sequential proposal IDs, new super quorum mechanism, and other governance improvements.