Upcoming Changes to Ethereum Testnet & Optimism Mainnet in Nodit
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Upcoming Changes to Ethereum Testnet & Optimism Mainnet in Nodit

Dear Users,

We’d like to inform you about several upcoming changes in Nodit services in accordance with recent updates to major blockchain networks. Please review the following summary and prepare your systems accordingly.

Summary

Ethereum

  • Holesky testnet support will end on May 31, 2025.
  • Hoodi testnet support is coming soon (date TBA).

Optimism

  • From May 31, 2025, Nodit’s Optimism mainnet RPC API will support block data queries only for data after the Bedrock hard fork (June 2023).
  • Block data before Bedrock will no longer be accessible via the RPC API.

Ethereum Testnet Changes

Following Ethereum's "Pectra" upgrade, the Foundation introduced the Hoodi testnet (live as of March 18, 2025) and plans to sunset Holesky in September 2025. Nodit will align our network support accordingly―please note that Holesky deprecation is confirmed for the end of May 2025, while Hoodi support is still being finalized. We will announce the exact dates for Hoodi as soon as they're set.


1. What's changing?

Hoodi Testnet

  • Live as of March 18, 2025
  • Ethereum Foundation’s recommended post‑Pectra test network
  • Nodit will support Hoodi in the coming weeks (exact date TBA)

Holesky Testnet

  • Scheduled for sunset by Ethereum Foundation in September 2025
  • Nodit will deprecated Holesky support on May 31, 2025.

2. What you need to do

If you're currently using Holesky:

  • Plan to migrate off Holesky before May 31, 2025.
  • Change the {network} segment in your API URLs to sepolia(available now) or hoodi(coming soon).
    • Node API: https://ethereum-{network}.nodit.io/
    • Web3 Data API: https://web3.nodit.io/v1/ethereum/{network}/…

To prepare for Hoodi support:

  • Keep your configurations ready to switch {network} to hoodi once we confirm and publish the Hoodi endpoints.

3. Timeline

DateEvent
March 18, 2025Ethereum’s Hoodi testnet launches
Coming soon (TBA)Nodit enables support for Hoodi (date to be announced)
May 31, 2025Nodit ends support Holesky
September 2025Ethereum Foundation sunsets Holesky

Optimism Mainnet Changes

1. What's changing?

Starting May 31, 2025, Nodit will update its Optimism mainnet RPC API support as follows:

  • After the Optimism “Bedrock” hard fork (June 2023), Nodit’s Optimism mainnet RPC node API will support block data RPC requests only for data after the Bedrock upgrade.
  • Impact:
    Block data prior to the Bedrock hard fork will no longer be accessible via the RPC API.

2. What you need to do

  • If you rely on pre-Bedrock block data, please export or back up any necessary information before May 31, 2025.
  • Adjust your integration and data access strategies to reflect this change.

We appreciate your understanding and cooperation as we align with the latest changes in the blockchain ecosystem. Our documentation will be updated with exact go-live dates and technical details as they become available.

If you have any questions or need assistance, please visit our Q&A page.

Thank you for building with Nodit!

—The Nodit Team