Crypto Gloss

Blockstream

Blockstream is a Bitcoin-focused technology company founded in 2014. It develops infrastructure and software around Bitcoin, including the Liquid Network, the open-source Elements platform, Blockstream App and Jade wallets, enterprise tools, and Lightning-related developer software. Adam Back is its co-founder and CEO.

Company Background

Blockstream works on cryptography, distributed systems, and products built around Bitcoin. The company is the technical provider for Liquid, but the network is operated by a wider federation: Blockstream does not alone sign Liquid blocks or hold all of the federation’s reserve bitcoin. Its current product range also includes Blockstream App and Jade for wallet use, AMP for asset issuance on Liquid, and Elements and Core Lightning developer projects.

Products and Services

Blockstream’s work spans consumer tools and shared network infrastructure. The Blockstream App and Jade hardware wallet support Bitcoin and Liquid use cases; enterprise offerings include custody and treasury tools; AMP is used to issue and manage assets on Liquid. Elements provides the open-source software base for Liquid, while Core Lightning is a separate implementation of the Lightning Network protocol. Product availability and supported features can change, so the company’s current documentation is the best source for service details.

Liquid Network

Liquid is a Bitcoin sidechain built with Elements. It has a federation-based consensus system rather than Bitcoin’s proof-of-work mining: 15 functionary nodes operate the chain, and a block needs at least 11 signatures. Under normal operation, blocks are produced about once a minute and two confirmations are used for settlement. Liquid also supports confidential transactions and issued assets. These features come with a different trust model from Bitcoin’s main chain because block signing and bitcoin reserve operations depend on federation members.

A peg-in moves BTC into the federation’s reserve and issues Liquid Bitcoin (L-BTC) on the sidechain; a peg-out returns value to the Bitcoin network through authorized federation processes or supported services. Under normal operation, L-BTC is intended to track BTC one to one. As of October 2026, that reserve backing and the federation’s direct peg-out service were still part of a staged recovery after a security incident.

2026 Liquid Security Incident

On September 6, 2026, a flaw in the Elements range-proof verification cache caused Liquid nodes to accept about 4,000 unbacked L-BTC. The tokens were sent through a normal peg-out route, after which the federation released about 3,996 BTC to a Bitcoin address. Blockstream’s September incident report says no signing keys were compromised; it attributes the event to validation software accepting an invalid chain state. The unidentified actors called themselves white hats, but that claim does not establish their authorization or motive.

About 3,400 BTC was returned on September 7, leaving approximately 602 BTC outstanding in Blockstream’s September 23 accounting. Elements 23.3.4, which hardened the affected proof-cache handling, was released on September 9. The corrected chain resumed block production on September 9 and user transaction activity on September 10. Blockstream said its revalidation found no remaining inflation on the corrected chain; this did not immediately restore the reserve shortfall or direct peg-outs.

The Liquid Federation’s October 20 recovery update said swaps through participating providers were being re-enabled while direct federation peg-outs remained restricted until the reserve returns to full one-to-one backing and remaining security and operational requirements are met. On October 21, SideSwap reported that its separate provider-level peg-out service had reopened and had paid more than 60 BTC across about 600 requests. SideSwap said those payouts came from its own bitcoin wallet and bulk swaps; that is not the same as the federation’s own peg-outs being restored.

Security Trade-Offs

Liquid can offer faster settlement, asset issuance, and transaction confidentiality, but it is not simply Bitcoin with extra features. Users rely on Elements consensus validation, federation signers, reserve accounting, and the route used to peg assets in or out. The 2026 incident showed that multisignature controls cannot by themselves prevent a software bug from making invalid assets appear valid to the network. Bitcoin’s main chain was not compromised, but Liquid users faced disruption and a reserve shortfall. Anyone evaluating Liquid should distinguish its corrected transaction history from the still-staged restoration of direct federation redemptions.

Social Media Sentiment

  • Reddit, r/Bitcoin: A September 2026 thread asked whether the Liquid incident should change confidence in Blockstream or its Jade wallet. Replies were mixed: some said a sidechain software failure did not show that Jade had a backdoor, while others emphasized that open-source firmware does not make every user able to verify a device and recommended minimizing trust in signing hardware. This is a small, incident-focused discussion, not a survey of Blockstream customers or Bitcoin users. Read the discussion.

Last updated: 2026-10

Related Terms

See Also

Sources