OpenZeppelin Contracts 5.0: What You Need to Know

OpenZeppelin Contracts 5.0: What You Need to Know


2 min read

OpenZeppelin Contracts 5.0 emerges, offering a suite of advancements that promise not only heightened security but also an optimised developer journey.

A Closer Look at Simplification and Modernisation

The OpenZeppelin Contracts 5.0 release signifies a deliberate stride towards simplification and modernisation, with a series of modifications aimed at enhancing the developer experience and fortifying security. The removal of token hooks from ERC20, ERC721, and ERC1155, and the introduction of a single _update function, which can be overridden for custom behaviours in various operations, exemplifies a shift towards a more streamlined and secure development framework.

Moreover, the removal of certain functions and contracts, such as Address.isContract and SafeMath, indicates a recalibration of the library, potentially paving the way for future versions to reintroduce these elements with enhanced support and functionality.

Namespaced Storage: A Strategic Approach to Upgrade Security

The implementation of namespaced storage, inspired by the diamond storage pattern and standardised through ERC-7201, emerges as a strategic solution to circumvent the challenges and risks associated with storage layout changes in upgradeable contracts. This approach not only mitigates potential security risks associated with storage layout collisions between implementation versions but also introduces a mechanism that allows each inherited contract to maintain its own storage pointer, thereby enhancing security during subsequent upgrades.

Harnessing the Potential of Solidity Compiler Additions

The upgrade to Solidity 0.8.20 enables the incorporation of several notable features, such as custom errors and explicit imports, into OpenZeppelin Contracts 5.0. The introduction of custom errors, particularly, offers developers a more standardised and efficient means of reporting errors in smart contracts, which can also include dynamic arguments, thereby enhancing the developer experience and facilitating improved error reporting and diagnosis.

A Step Towards Better Smart Contract Development

OpenZeppelin Contracts 5.0 introduces a refined toolkit, simplifying and enhancing security, efficiency, and the developer experience through its various updates and changes.

Rivanorth is a global boutique Web3 cybersecurity company. We specialise in smart contract audits and blockchain security advisory. Visit to find out more.

You build the future. We help you secure it.