What is the best Ethereum RPC for latest network upgrades?

Why Ethereum Upgrades Matter for RPC Selection

Ethereum's roadmap includes frequent hard forks and protocol upgrades that change how nodes process transactions, store state, and expose data via JSON-RPC. For example, the Dencun upgrade introduced EIP-4844 blob transactions, adding new methods like eth_getBlobSidecars and modifying the fee market. Future upgrades like Pectra will further alter state access patterns and may deprecate older APIs.

An RPC provider that lags in supporting these changes can break your application—causing failed transactions, incorrect data, or degraded performance. Therefore, selecting an RPC provider that actively tracks and implements Ethereum upgrades is essential for any production Web3 app.

• Dencun (March 2024): Added blob transactions, new RPC methods, and altered gas accounting.
• Pectra (expected 2025): May include EIP-7702 (account abstraction), EIP-7251 (consolidation), and state expiry preparation.
• Verkle trees (future): Will replace Merkle Patricia trees, requiring new proof methods and state access patterns.

Key Criteria for Upgrade-Ready Ethereum RPC Providers

When evaluating an Ethereum RPC provider for upgrade readiness, consider these factors:

First, method support. Does the provider expose new JSON-RPC methods immediately after an upgrade? For Dencun, that means eth_getBlobSidecars, eth_blobBaseFee, and updated eth_feeHistory. Second, client diversity. Providers running multiple client implementations (e.g., Geth, Nethermind, Besu) reduce the risk of client-specific bugs during upgrades. Third, testnet availability. Providers that offer Sepolia and Holesky endpoints let you test against upgrade conditions before mainnet.

• Immediate method support for new upgrade-related RPCs.
• Multi-client infrastructure to mitigate client-specific issues.
• Testnet endpoints (Sepolia, Holesky) for pre-upgrade testing.
• Clear communication about upgrade support timelines and known issues.
• Dedicated node option to run your own client version and control upgrade timing.
• Archive node support for historical data access after state changes.

How to Test an RPC Provider's Upgrade Support

Before committing to a provider, run a simple test suite against their endpoints to verify upgrade compatibility. Here's a practical approach:

First, check method availability by calling the new RPC methods on a testnet endpoint. For example, after Dencun, you can call eth_blobBaseFee on Sepolia. Second, compare block data consistency between the provider and a local node. Third, monitor error rates and latency during upgrade periods—providers with poor upgrade support often see spikes in errors.

• Call new methods: Use curl or web3.js to invoke upgrade-specific RPCs and verify they return expected data.
• Cross-check block hashes: Compare block data from the provider against a trusted source like Etherscan or a local node.
• Monitor error rates: Track eth_call and eth_sendRawTransaction failures during and after upgrades.
• Test with high concurrency: Simulate production traffic to see if the provider's infrastructure handles the upgrade load.

Common Pitfalls When Using RPC Providers During Upgrades

Even with a good provider, teams can run into issues. Here are common pitfalls and how to avoid them:

One pitfall is assuming all providers support new methods immediately. Some providers batch updates or require configuration changes. Another is relying on a single client—if that client has a bug, your entire app may fail. A third is neglecting to test on testnets; many teams only test on mainnet after the upgrade, leading to production incidents.

• Not verifying method support before the upgrade goes live.
• Using a provider with only one client implementation.
• Skipping testnet testing and relying solely on mainnet.
• Failing to monitor error rates and latency changes post-upgrade.
• Not having a fallback provider in case of upgrade-related outages.

OnFinality's Approach to Ethereum Upgrade Support

OnFinality provides Ethereum RPC endpoints that are updated to support the latest network upgrades. Our infrastructure runs multiple client implementations and offers both shared and dedicated node options. We maintain testnet endpoints for Sepolia and Holesky, allowing you to test your dApp against upcoming upgrade conditions.

For teams that need full control, dedicated Ethereum nodes let you choose your client version and upgrade timing. This is especially valuable for applications that require stability during protocol transitions. OnFinality also supports archive node access for historical data, ensuring your analytics and compliance workflows are not disrupted by state changes.

• Shared RPC endpoints updated promptly for new upgrades.
• Dedicated nodes with client version selection for upgrade control.
• Testnet endpoints (Sepolia, Holesky) for pre-upgrade validation.
• Archive node support for historical data continuity.
• Transparent communication about upgrade support and known issues.

Preparing Your dApp for Future Ethereum Upgrades

Beyond choosing the right RPC provider, you can take steps to make your dApp resilient to upgrades. First, abstract your RPC layer so you can switch providers or endpoints without code changes. Second, implement fallback logic that retries with different methods or endpoints if a call fails. Third, subscribe to provider status pages and Ethereum upgrade announcements to stay informed.

By combining a upgrade-ready RPC provider with robust application architecture, you can ensure your dApp continues to function smoothly through Ethereum's evolution.

• Use an RPC abstraction layer to switch providers easily.
• Implement fallback endpoints and retry logic.
• Monitor provider status and Ethereum upgrade timelines.
• Test your dApp on testnets before each upgrade.
• Consider dedicated nodes for mission-critical applications.

Frequently Asked Questions