# Spire’s DA Builder Powers Aztec Provers

By [Spire Labs](https://paragraph.com/@spire) · 2026-04-02

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Spire's **DA Builder** is now powering provers on [Aztec Network](https://x.com/aztecnetwork), enabling the most cost-efficient proof submission through transaction aggregation.

This marks an important step in supporting Aztec’s fully permissionless architecture, where both sequencing and proving are open to anyone, and reinforces the role of efficient infrastructure in scaling decentralized systems.

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Enabling Efficient Participation in a Permissionless Proving Network
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Aztec is one of the first rollups to introduce **permissionless proving**, allowing any participant to generate and submit proofs for proposed blocks.

This open design strengthens decentralization, but it also introduces a challenge:

Provers must independently submit transactions to Ethereum L1, competing in the same fee market as all other users. As a result, gas efficiency and transaction inclusion become critical to profitability and performance.

Spire’s DA Builder addresses this by aggregating and optimizing proof submissions before they are posted to Ethereum, delivering:

1.  **Cost Reduction:** Aggregated submissions significantly reduce per-proof gas costs.
    
2.  **Faster Inclusion:** Optimized transaction landing improves inclusion latency in Ethereum blocks.
    

Together, these improvements make permissionless proving more economically viable—especially as network activity scales.

![](https://storage.googleapis.com/papyrus_images/8dd252b419d66355637a072f57c259cae6d4dce61f6dd13b07fc0553fd4f5682.png)

Prover + DA Builder

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Expanding to Sequencer Support
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While DA Builder is now live for Aztec provers, this is only the beginning. With the next Aztec mainnet upgrade, DA Builder will be integrated to support **Aztec sequencers**, enabling the most cost-efficient block building.

Unlike many rollups that start with a centralized sequencer, Aztec launched with a fully decentralized sequencer network. Nodes are randomly selected to build and validate blocks, reducing censorship risk by design.

This design empowers sequencers to choose how to land L1 block proposal transactions and how much gas to pay. There’s game theory at play: sequencers must get transactions included (earn rewards) without overpaying for gas. Rational actors will always try to minimize overhead.

DA Builder will do exactly that. By aggregating and optimizing L1 submissions, it enables sequencers to compete efficiently in Aztec’s permissionless environment.

![](https://storage.googleapis.com/papyrus_images/fdd678c410da43423b0762e3d2bf23d42c3864c2c21372ace2a037c6dfa7eacc.png)

Sequencer + DA Builder

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Strengthening the Economics of Decentralized Infrastructure
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As rollups evolve toward fully decentralized systems, **operational efficiency becomes a key enabler of participation**.

Without cost-efficient infrastructure, permissionless systems risk centralization due to high operational overhead. By improving how transactions are submitted to Ethereum L1, DA Builder helps:

*   Lower the barrier to entry for node operators
    
*   Improve profitability for participants
    
*   Support long-term network resilience and decentralization
    

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Adding DA Builder Today
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Aztec provers can now leverage DA Builder on the Aztec mainnet, [**available today**](https://www.notion.so/spirepartners/Aztec-Ignition-Prover-Options-2ea5534d3c4c801d8473c4d1cc688209?source=copy_link)**.**

Support for Aztec sequencers will be included in the next Aztec mainnet upgrade.

If you're running an Aztec node, [contact us](https://www.spire.dev/contact) to ensure your setup is fully optimized for cost-efficient operation.

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*Originally published on [Spire Labs](https://paragraph.com/@spire/dabuilder-aztec)*