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Jump Crypto

Jump Crypto and Firedancer: building Solana a second engine

The crypto arm of high-frequency trading firm Jump Trading, which wrote the independent validator client Firedancer from scratch in C. The Firedancer family now runs over a tenth of stake, so Solana no longer relies on a single client.

About Firedancer ↗Firedancer docs ↗← Back to key players

Who they are

Jump Crypto is the crypto division of the US high-frequency trading firm Jump Trading. High-frequency trading lives and dies by network latency and throughput, which is what gave Jump the confidence to write a client for Solana.

Why Firedancer is needed

If every validator on a blockchain runs the same software, one bug in that software can stop the whole chain. Ethereum has five or six independent clients; for a long time Solana had only one (first Solana Labs’ version, then Anza’s Agave). Several of Solana’s past outages were linked to client bugs.

Firedancer is a second client rewritten entirely independently: a different team, a different language (C) and a different architecture. Even if Agave fails, validators running Firedancer can keep going, and vice versa.

Timeline

  • August 2022: the Firedancer repository was created and Jump announced a new client for Solana.
  • November 2023: demonstrated at Breakpoint, processing about one million transactions per second in a test environment.
  • September 2024: the transitional build Frankendancer reached mainnet. It uses Firedancer’s networking and block-production modules while still borrowing Agave’s code for execution.
  • Since then: the full Firedancer has entered mainnet. Releases are numbered by year and month; the latest on GitHub is v26.10.x.

How much stake runs it now

Counting the versions nodes report, the Firedancer family currently runs about 13.2% of stake: Firedancer (26.x) about 12.8%, Frankendancer (0.x) about 0.3%.

The higher this share, the lower the risk of a single client bug taking down the network. For “no single client failure can halt the chain”, each client’s share of stake needs to be below one-third.

Jump’s other crypto businesses have been involved in several controversies. They have nothing to do with Firedancer’s technology, but they help explain who Jump is:

  • Wormhole: when the Wormhole bridge was drained of about 120,000 ETH in February 2022, Jump covered the loss out of its own pocket.
  • Terra: in December 2024 a Jump subsidiary settled with the SEC for about $123 million over its role in the collapse of Terra’s UST stablecoin.

What to watch

  1. The Firedancer family’s share of stake (live on the special page).
  2. Major Firedancer releases and security announcements.
  3. Any divergence between Firedancer and Agave at the same block height: both clients must produce exactly the same result for the same block.

Sources

  • Jump Crypto’s Firedancer page, the Firedancer docs and repository (GitHub API).
  • Share of stake is calculated from the versions reported by Solana mainnet nodes.
  • The Wormhole and Terra events are based on the parties’ announcements and the SEC’s announcement. This page is an educational summary and is not investment advice.