Fidelity Digital Assets Review of Ethereum Shanghai Capella Upgrade

This technical report details the Ethereum Shanghai/Capella upgrade, which is a significant hard fork affecting both the execution layer and consensus layer of the Ethereum network. Scheduled for April 12, 2023, this upgrade allows validators to withdraw their staked ether, finalizing the changes introduced by The Merge. The report outlines the potential impacts of the upgrade, noting that validators’ core responsibilities largely remain unchanged, including proposing new blocks and voting on block inclusion. It provides insight into the dynamics of validator withdrawals, including automatic partial withdrawals for those with balances above the effective cap of 32 ether, and varying timelines for full withdrawals. The report discusses the implications for the total amount of staked ether, arguing that the availability of withdrawals may not decrease staked ether but could actually lead to an increase. The risks and rewards associated with staking are examined, along with the potential for the upgrade to enhance investor confidence in Ethereum as a sustainable income-generating asset.