Pectra Upgrade on Sepolia: Issues and Solutions

user avatar

by Giorgi Kostiuk

a year ago

The Pectra upgrade on the Sepolia testnet faced unexpected issues, including the production of empty blocks.

Problems with Pectra Upgrade

The Pectra upgrade on Ethereum's Sepolia testnet faced unexpected challenges. Developers experienced bugs in their geth nodes and mined empty blocks immediately upon deployment. The issue arose from an incorrect interaction with the deposit contract, leading to unintended log events and invalid blocks that hampered transaction processing. Developers quickly identified the root cause and proposed a fix to ignore invalid logs. However, the major task was deploying the fix without splitting the chain.

I wrote up the story of the Pectra incident on Sepolia, it's an interesting story about edge cases, coordination and an attacker who swooped in and made our lives much harder!Marius Van der Wijden

New Zero-Token Vulnerability

Even though developers believed the issue was resolved, empty blocks began reappearing. It was soon discovered that an external party exploited a lesser-known aspect of the ERC-20 standard: zero-token transfers. This method allowed anyone to trigger transfer events, bypassing the original fix. In response, developers quickly deployed a private patch blocking transactions with the deposit contract on a limited number of DevOps nodes.

Ethereum Developers' Plans

At 14:00 UTC, Sepolia nodes synchronized with the official patch, restoring normal block production. The developers found that the issue was due to the Sepolia deposit contract being token-gated, unlike the mainnet variant. The attack revealed an issue with the ERC-20 standard—zero-token transfers still emit events. In light of such risks, developers plan deeper reviews of smart contract interactions before deploying Pectra on the Ethereum mainnet.

As a result of the incident, developers have decided to conduct more comprehensive testing prior to deploying updates on the Ethereum mainnet.

Tier I

Sector: #18291

Sealed Cache Room

Resource Cache

Resource Cache

Tier I

Requires 25% Tier Progress to Claim
Meme Cache

Meme Cache

Tier I

Requires 50% Tier Progress to Claim
Equipment Cache

Equipment Cache

Tier I

Requires 75% Tier Progress to Claim

After collecting, caches will be stored in your inventory and can be opened with Keys.

Other news

OpenAI Claims to Solve Navier-Stokes Equations Amid Controversy

chest

OpenAI announced on September 8, 2026, that it has solved the Navier-Stokes equations, a significant problem in mathematics, but faces criticism from NYU mathematician Tristan Buckmaster regarding the originality of the solution.

user avatarTenzin Dorje

Cronos Reverses Transactions to Mitigate Exploit Damage

chest

Cronos blockchain network rolled back nearly two hours of transaction history to recover funds after a significant exploit of the Tectonic lending protocol.

user avatarBayarjavkhlan Ganbaatar

MEXC Introduces Opportunity Compass for Enhanced Market Understanding

chest

MEXC has launched Opportunity Compass, an educational initiative aimed at helping users understand both crypto and traditional financial markets.

user avatarMohamed Farouk

MEXC Introduces Opportunity Compass for Crypto Education

chest

MEXC has launched Opportunity Compass, an initiative aimed at educating cryptonative users about global markets and financial opportunities.

user avatarElias Mukuru

Zoomex Highlights Market Volatility Amid Economic Shifts

chest

Zoomex highlights its platform's capabilities during a week of sharp market volatility driven by economic data, enabling traders to respond in real-time.

user avatarDiego Alvarez

Tesla Faces Regulatory Scrutiny, Stock Drops

chest

Tesla's shares fell 6% following a new investigation into its autonomous vehicle technology by the National Highway Traffic Safety Administration, highlighting the impact of regulatory scrutiny on the stock market.

user avatarMaria Fernandez

Important disclaimer: The information presented on the Dapp.Expert portal is intended solely for informational purposes and does not constitute an investment recommendation or a guide to action in the field of cryptocurrencies. The Dapp.Expert team is not responsible for any potential losses or missed profits associated with the use of materials published on the site. Before making investment decisions in cryptocurrencies, we recommend consulting a qualified financial advisor.