Category: Proxy Patterns
Smart Contract Foundry Upgrades with the OpenZeppelin Plugin
Smart Contract Foundry Upgrades with the OpenZeppelin Plugin Upgrading a smart contract is a multistep and error-prone process, so to minimize the chances of human error, it is desirable to…
UUPS: Universal Upgradeable Proxy Standard (ERC-1822)
UUPS: Universal Upgradeable Proxy Standard (ERC-1822) The UUPS pattern is a proxy pattern where the upgrade function resides in the implementation contract, but changes the implementation address stored in the…
The Beacon Proxy Pattern Explained
The Beacon Proxy Pattern Explained A Beacon Proxy is a smart contract upgrade pattern where multiple proxies use the same implementation contract, and all the proxies can be upgraded in…
ERC-7201 Storage Namespaces Explained
ERC-7201 Storage Namespaces Explained ERC-7201 (formerly EIP-7201) is a standard for grouping storage variables together by a common identifier called a namespace, and also to document the group of variables…
Transparent Upgradeable Proxy
The Transparent Upgradeable Proxy Pattern Explained in Detail The Transparent Upgradeable Proxy is a design pattern for upgrading a proxy while eliminating the possibility of a function selector clash. A…
Nodelegatecall Explained
Nodelegatecall Explained The nodelegatecall modifier prevents delegatecalls from being sent to a contract. We will first show the mechanism for how to accomplish this then later discuss the motivation for…
Delegatecall: The Detailed and Animated Guide
Delegatecall: The Detailed and Animated Guide This article explains how delegatecall works in detail. The Ethereum Virtual Machine (EVM) offers four opcodes for making calls between contracts: CALL (F1) CALLCODE…
The Fallback Extension Pattern
The Fallback Extension Pattern The fallback-extension pattern is a simple way to circumvent the 24kb smart contract size limit. Suppose we have functions foo() and bar() in our primary contract…
EIP 1967 Storage Slots for Proxies
EIP 1967 Storage Slots for Proxies EIP 1967 is a standard for where to store information that proxy contracts need to execute. Both the UUPS (Universal Upgradeable Proxy Standard) and…
The initializable smart contract design pattern
The initializable smart contract design pattern Initializers are how upgradeable contracts achieve the behavior of a constructor. When deploying contracts, it’s common to call a constructor to initialize storage variables.…