Pectra Blob Schedule (Sepolia)

Overview of the Pectra Blob Schedule hardfork, an optional upgrade that delays adoption of Ethereum’s increased blob count schedule on Base.

Activation Timestamps

Network	Activation timestamp
mainnet	Not activated
sepolia	1742486400 (2025-03-20 16:00:00 UTC)

The Pectra Blob Schedule hardfork is an optional hardfork which delays the adoption of the Prague blob base fee update fraction until the specified time. Until that time, the Cancun update fraction from the previous fork is retained.

Note that the activation logic for this upgrade is different to most other upgrades. Usually, specific behavior is activated at the hard fork timestamp, if it is not nil, and continues until overridden by another hardfork. Here, specific behavior is activated for all times up to the hard fork timestamp, if it is not nil, and then deactivated at the hard fork timestamp.

Consensus Layer

• Derivation