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What is Firedancer? Explore Solana's New Validator Client

What is Firedancer? Explore Solana's New Validator Client

Written by Tau

Brady Werkheiser headshot

Reviewed by Brady Werkheiser

Published on 2023-01-204 min read

Solana has a single validator client that every node supporting the third-generation blockchain uses to support the network. Because node client diversity makes blockchains more anti-fragile (i.e. less likely for the network to go down), introducing a second validator client to Solana that is intentionally designed for performance is an exciting evolution in one of web3's most promising layer one blockchains.

In this article, we will explore Solana's current validator client, how Firedancer introduces improvements, and the underlying technology behind the client.

What is Firedancer?

Firedancer is a next-generation independent validator client for the Solana blockchain that is being designed by the team at Jump Crypto to improve upon Solana's current, and only validator client. Besides introducing client diversity into Solana's ecosystem, Firedancer is designed to offer increased performance and scalability.

In a November 2022 live demo, a single validator running the new Firedancer client processed 1.2 million transactions per second. While the production release of the Firedancer client is yet to be announced, early demos show promise that Firedancer will introduce redundancy and performance improvements to Solana's network.

In addition to performance improvements, Jump Crypto's Firedancer client may make running Solana nodes cheaper as it is designed to be more efficient, which could result in lower operating costs for node operators. However, the cost of running a node will depend on a variety of factors, including hardware and infrastructure costs.

In what programming languages is Firedancer written?

Firedancer is developed in C and C++, a pair of programming languages known for hardware performance and reliability. They’re designed to be fast and memory-efficient, making them well-suited for building high-performance software.

According to Jump, early releases of Firedancer will have some compatibility with Rust. This makes sense since most developers are using the language in their smart contracts. However, as the project ages, it will focus mainly on C/C++ based codebase to stay in line with their own systems underlying language and logic.

Firedancer vs. the Current Solana Node Client

To paint a vivid picture of the improvements introduced with Firedancer, let’s look at the key limitations associated with the stock Solana validator clients. This way, we can weigh the usefulness and anticipated upgrades that’ll come with Firedancer.

What are the limitations of the existing Solana node client?

Solana validator clients have some limitations that can impact their performance and scalability. Most of these limitations are software-based and not due to node hardware. Some of these limitations include:

1. Concurrent Transaction Processing

Solana validators can only process a limited number of transactions at a time, which can result in slower transaction processing and potential bottlenecks. This can be a problem as the Solana network grows and the number of transactions increases.

2. Sharding Support

Solana's current validator clients do not support sharding, which is a technique that allows a blockchain to scale horizontally by dividing the network into smaller pieces (called shards). This can result in a lack of scalability as the network grows.

What are the improvements of the new Firedancer node client?

The Firedancer client aims to address existing limitations and improve upon the current Solana validator clients in several ways: enhanced concurrent transaction processing, sharding support, optimized P2P communication, and improved consensus protocol support.

1. Enhanced Concurrent Transaction Processing

The Firedancer client is designed to support a higher number of concurrent transactions, which can result in faster transaction processing times and fewer bottlenecks. This is achieved through the use of C and C++, programming languages that are known for their high operation performance, and reliability.

Additionally, the compatibility with Rust-based decentralized applications upon launch. Codebase created for concurrency will be able to port that onto the new validator and still reap the efficiency benefits.

2. Sharding Support

In addition to enhanced concurrent transaction processing, the Firedancer client also includes support for sharding. This can improve scalability as the network grows and allows the Solana blockchain to scale horizontally.

3. Networking and P2P Communication

The Firedancer client includes optimized networking and P2P communication protocols to improve the efficiency and speed of block and transaction propagation. This is achieved through the use of techniques such as compression and batching, which can reduce the amount of data that needs to be transmitted over the network.

4. Enhanced Consensus Protocol

The Firedancer client uses a modified version of the Solana consensus protocol, which is a proof-of-stake (PoS) protocol that allows validators to participate in the consensus process and earn rewards for their contributions to the network. The modified version used by Firedancer is designed to be more efficient and reliable than the original protocol. Firedancer is not replacement, rather an augmentation of the already active Solana validator client.

Pros and Cons of Using Firedancer:

The intended benefits of Firedancer outweigh the downsides to its implementation:

Pros and Cons of Using Firedancer
Pros and Cons of Using Firedancer

Expanded Benefits of Using Firedancer

Some of the benefits of using the Firedancer client include:

1. Improved Performance and Scalability

As mentioned earlier, the Firedancer client is designed to support a higher number of concurrent transactions and includes support for sharding, which can improve the overall performance and scalability of the Solana ecosystem.

2. Enhanced Reliability

The Firedancer client includes a number of optimizations and enhancements to improve its overall reliability, which can result in fewer downtime incidents and a more stable network.

3. More Efficient

The Firedancer client is designed to be more efficient than existing Solana validator clients, which can result in lower operating costs for node operators.

4. Open-source Codebase

Firedancer’s open-source codebase makes it easy for developers and contributors to keep the project on an upward scaling slope. In short, with that kind of community-based support things will only get better with time for adopters.

5. More failure points/options

Having more validator nodes across the decentralized network translates to resiliency through there not being a single failure point. As long as either the original, or Firedancer is up and running, we should anticipate fewer network downtime incidents.

Tradeoffs to Consider

However, there are also some tradeoffs to consider when choosing to switch to the Firedancer client: it's newer technology, and there is a learning curve for infrastructure providers.

1. Newer Technology

As a newer validator client, the Firedancer client is still in development and may have some bugs or issues that need to be ironed out.

2. Learning Curve

As a new client, node operators may need to spend some time learning how to use the Firedancer client and may need to update their existing processes and systems to accommodate it.


In summary, the Firedancer client is a next-generation validator client for the Solana blockchain that aims to improve upon existing validator clients in several ways. It includes enhanced concurrent transaction processing, sharding support, and other optimizations and enhancements to improve its overall performance and reliability. While it is still in development, the Firedancer client has the potential to be a game-changer for the Solana network.

Firedancer Resources

For more information on the Firedancer client, please see the following resources:

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