Solidity 0.8.7 Release Announcement

Solidity v0.8.7 introduces support for the London upgrade, includes various improvements to Yul to EVM code transformation, the SMTChecker and some bugfixes. Please note: Unfortunately, the npm package of this version is corrupted. Pulling the solc-js repository directly will work. [Read More]

What Happened with Solidity-related Domains?

Some time ago we decided to get a domain that the Solidity team has easy access to in order to streamline efforts and initiatives that were hosted on other domains before. And so soliditylang.org was born! 🎉 We announced most of these domain changes individually on Twitter, but we want to take a moment to also officially announce it here on the blog and explain the various subdomains we have now, what they are for and which older domains may... [Read More]

Solidity ABI Decoder Bug For Multi-Dimensional Memory Arrays

On April 5th, 2021, a bug in the Solidity ABI decoder v2 was reported by John Toman of the Certora development team. Certora’s bug disclosure post can be found here: Memory Isolation Violation in Deserialization Code. The bug is fixed with Solidity version 0.8.4 released on April 21st, 2021. The bug is present in all prior versions of ABI coder v2. We assigned the bug a severity level of “very low”, mainly due to the fact that it is very... [Read More]

Custom Errors in Solidity

Starting from Solidity v0.8.4, there is a convenient and gas-efficient way to explain to users why an operation failed through the use of custom errors. Until now, you could already use strings to give more information about failures (e.g., revert("Insufficient funds.");), but they are rather expensive, especially when it comes to deploy cost, and it is difficult to use dynamic information in them. Custom errors are defined using the error statement, which can be used inside and outside of contracts... [Read More]

Announcing Solidity Version Collectibles & Community Governance 💎

⚠️ Attention: This post is an April Fools’ Day joke. Please consume it at your own risk. We will not distribute any Solidity NFTs in the foreseeable future. Stay safe. Today, we are excited to announce a little surprise we’ve been working on silently for the last couple of weeks. We heard that you really like crypto-related collectibles and we listened. You will soon be able to own a digital piece of Solidity’s history: We’re tokenizing each Solidity version as... [Read More]

Solidity 0.8.3 Release Announcement

Solidity v0.8.3 fixes the Solidity Optimizer Keccak Caching Bug, which is present in all prior versions of Solidity, and, in addition, includes two improvements to the optimizer which can provide a big gas benefit when writing structs that cover a full storage slot to storage. [Read More]

Solidity Optimizer Keccak Caching Bug

On March 20, 2021, a bug in Solidity’s bytecode optimizer was found by differential fuzzing. The bug is fixed with version 0.8.3 released on March 23, 2021. The bug is present in all prior versions of Solidity. We assigned the bug a severity level of “medium”. [Read More]