Data Availability

Data Availability (DA) is a critical part of any rollup system. It ensures that all the transaction data behind a rollup’s state changes is publicly accessible - allowing anyone to verify the rollup’s correctness and reconstruct the current state.

Without secure DA, a rollup could claim a new state root without revealing how it got there - making it impossible to independently verify or challenge.

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How Solaxy Handles DA

Solaxy uses a modular data availability layer, giving it the flexibility to balance security, performance, and cost depending on the environment.

Primary DA Layer: Solana L1

For production and high-trust environments, Solaxy publishes transaction data and proofs directly to Solana Layer 1. This inherits the strong security guarantees of Solana’s consensus and validator set.

Benefits:

• Secure, censorship-resistant data storage

• Transparent and verifiable by anyone

• Long-term archival persistence

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Optional DA Layer: Celestia

For performance testing, alternative configurations, or cost-sensitive applications, Solaxy can optionally publish data to Celestia, a dedicated modular DA network.

Benefits:

• Lightweight DA layer optimized for throughput

• Lower publishing costs for large data batches

• Separation of execution and data roles

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DA Modes in Solaxy

Solaxy supports multiple DA strategies:

• Inline Posting (to Solana L1): Data is posted alongside proofs during settlement.

• External Posting (e.g. Celestia - Not implemented yet): Data is committed to a secondary layer with references anchored on Solana L1.

In both cases, Solaxy ensures:

• All necessary transaction data is retrievable

• Validators, light clients, and users can independently verify rollup behavior

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Future DA Enhancements

Solaxy’s modular architecture will allow support for additional DA layers and innovations, such as:

• Shared DA markets

• Erasure-coded storage

• Reed-Solomon fallback proofs

• Fraud-proof-based DA guarantees

This flexibility allows Solaxy to evolve alongside the broader modular blockchain ecosystem.