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Storage & Data Availability

Data Availability

Data Availability is an open-source Rust project that uses NEAR as a data-availability storage layer for arbitrary blobs, including rollup sequencing data. It combines a blob-store contract with an off-chain light client, an HTTP sidecar and a Rust DA RPC client to support submission, retrieval and inclusion-proof verification workflows.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Data Availability — OpenViST project profile in Storage & Data Availability.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when building or evaluating a rollup workflow that submits data to NEAR and needs a way to check submission inclusion. Plan explicitly for contract deployment, sidecar configuration and data retrieval through archival nodes or indexers.

Who it is for

  • Rollup teams evaluating NEAR for data-availability storage.
  • Developers integrating blob submission and verification into rollup systems.
  • Rust developers who want to use the project’s DA RPC client.

Documented uses

  • Store arbitrary data blobs without placing blob contents directly in NEAR blockchain state.
  • Submit rollup sequencing data and obtain transaction IDs for a blob commitment.
  • Check transaction or receipt inclusion with the NEAR light client.
  • Connect rollup software to NEAR DA through an HTTP sidecar or Rust client.
Before you choose

Requirements & limits

The repository is public and licensed under MIT. Its documented setup requires a funded NEAR account and development tooling; the project describes deploying the contract and sidecar yourself.

  • Blob contents are not stored directly in NEAR blockchain state; the design relies on NEAR receipt consensus and transaction data retention outside state.
  • A blob commitment can comprise multiple NEAR transaction IDs, depending on blob size.
  • The README describes at least three NEAR epochs of function-input retention on full nodes, with longer retention possible from archival nodes; indexers can also provide data.
  • The project recommends the HTTP sidecar for most rollup SDKs, while retaining a Rust client crate for Rust applications.
  • The README identifies integrations with OP Stack, Polygon CDK and Arbitrum Nitro, but says reference implementations are in flux and may not be production-grade.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Prepare the contract and sidecar setup

Set up the documented prerequisites and configuration path for deploying a NEAR DA contract and sidecar.

Before you start

  • A NEAR account with funds and permission to deploy the contract.
  • Rust, Go, CMake and related native build tools; alternatively, the README describes using Nix with direnv.
  • The near-cli-rs version of NEAR CLI, contract keys, and synced Git submodules if the repository was cloned without them.

Steps

  1. Clone the repository and prepare its documented development prerequisites.

  2. Build your contract with the command below if using your own contract, and set the required keys and deployment address as described in the repository.

    Documented command
    make build-contracts

  3. Configure the sidecar through http-config.json or its documented PUT /configure option, then deploy it using the repository’s Docker Compose file.

Expected outcome

The documented setup path prepares a contract and configures the HTTP sidecar to interact with NEAR DA.

Guide limitations

  • This guide covers setup, not a completed deployment or a blob submission.
  • Contract deployment requires appropriate permission; the README notes the reference integrations are in flux and not necessarily production-grade.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
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Sources checked
13 October 2026
Original website title
Nuffle-Labs/data-availability · Official homepage title · retained in its source language
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