Due to the Delta hard fork, fees on the Optimism ecosystem chain were reduced.

The Delta hard fork was deployed to various Optimism-based chains last week, including OP Mainnet, Base, and Zora.

This update, aimed at reducing fixed overhead costs for Layer 1 fees, represents a significant reduction in line with initial expectations. According to OP Labs, Delta has helped reduce costs for chain operators by optimizing blockchain operations.

OP Labs, the core developer of Optimism, demonstrated the effectiveness of the Delta hard fork in reducing fixed overhead costs with data from Zora-sepolia, showing a 90% reduction in those costs. This increased Zora’s revenue collection.

“We expect this upgrade to ease the fee burden on all chain operators, making OP Stack adoption much easier,” OP Labs said.

The introduction of Span Batch, a key feature of the Delta upgrade, allows for consolidating successive layer 2 blocks into a single batch, reducing the amount of data that needs to be published to Ethereum.

The feature, developed by Test in Prod using an initial design from researcher Protolambda, was expected to reduce L1 fees by 6% to 11% for active chains and by more than 90% for less active chains before Delta was implemented. These predictions remained intact after implementation, the company noted.

Optimism consists of an ecosystem of layer 2 chains (collectively referred to as Superchains) that leverage optimistic rollups to reduce transaction costs for Dapps. This ecosystem is governed by a DAO known as the Optimism Collective.

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