Paradex DEX Rolls Back After BTC Perps Crash to Zero

Bitcoin (BTC) perpetual futures on Paradex DEX briefly plunged to zero, liquidating thousands of positions within seconds after a technical maintenance failure

In response, the Starknet-based decentralized perpetual exchange took the rare step of rolling back thousands of transactions to restore user funds.

A Technical Glitch Sent BTC Perps to Zero

In the early morning UTC hours of January 19, a scheduled backend database maintenance operation at Paradex encountered a critical error. During this process, a faulty migration or system error caused significant data mispricing on the platform.

The fault corrupted the price feed for Bitcoin (BTC), causing the exchange’s internal pricing mechanism to briefly display Bitcoin trading at $0.00 on perpetual markets

The incorrect price propagated through Paradex’s automated systems, triggering widespread liquidations of leveraged long positions within seconds

Perpetual prices for Bitcoin, Ethereum, and Solana reportedly crashed to nearly zero. On-chain data and user reports show that these forced liquidations hit within seconds as smart contract engines automatically reacted to the faulty pricing.

Paradex Rolled Back the Blockchain to Protect Users

To contain the damage and restore correct account states, Paradex engineers initiated a rollback of the protocol’s blockchain state to block 1,604,710, the last block verified before the maintenance error. This rollback effectively reverted trades, forced liquidations, and funding events executed after the error, resetting the system to its prior state.

Paradex Director of Engineering Clement Ho confirmed that the rollback was necessary to preserve platform integrity and protect user funds.

Following the rollback, Paradex reported that trading services had been restored and platform and vault withdrawals re-enabled. Most open orders from the affected period were force-cancelled, though take-profit and stop-loss orders were preserved where applicable. Certain features, including some deposit and withdrawal workflows, remained temporarily paused as the system stabilized.

Paradex also warned users about fake support accounts reaching out during the outage, urging traders to rely only on official communication channels. The platform has yet to provide a timeline for when all users will regain full access to their funds.

Blockchain Rollbacks Are Emergency Measures

A blockchain rollback is an emergency procedure that reverts the network to a previous block, undoing transactions and smart contract activity that occurred after that point. They are typically triggered by critical errors, bugs, or exploits to restore system integrity, though it temporarily suspends the blockchain’s core principle of immutability.

Rollbacks are rare, particularly on public decentralized networks, as they can raise questions about trust and reliability in systems where users expect fully automated, tamper-proof operations.

Notable cases include Ethereum’s 2016 DAO hack rollback, which recovered millions in stolen ETH. Outside of urgent situations, blockchain rollbacks are avoided to preserve confidence in the network.

Paradex Is a Rapidly Growing Derivatives Platform

Paradex has seen rapid growth alongside the broader on-chain derivatives market. The platform processed nearly $2.7 billion in trades the day before the outage, with approximately $641 million in open interest over the past 24 hours, according to DefiLlama.

Paradex is incubated by Paradigm, an institutional crypto derivatives liquidity network. Paradigm raised $35 million in a 2021 Series A at a $400 million valuation, with investors including Jump Capital, Alameda Ventures, Genesis, and Nexo.

Why This Matters

The incident highlights how even decentralized, automated trading platforms can be vulnerable to technical glitches, with errors quickly cascading into large-scale liquidations and shaking user confidence.

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People Also Ask:

What is a blockchain rollback? A rollback is an emergency measure that reverts the network to a previous block, undoing transactions and smart contract activity to restore system integrity.

Why are blockchain rollbacks rare? Rollbacks temporarily suspend blockchain immutability, which is core to trust in decentralized networks, so they are only used in extreme situations.

How did the rollback affect users? The rollback reversed trades and liquidations triggered by the glitch. Trading and withdrawals resumed, but some features remained temporarily paused.

Have there been similar incidents before? Notable past rollbacks include Ethereum’s 2016 DAO hack, which recovered millions in stolen ETH.

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