- Roman Kireev, a senior developer at Input | Output, resigned after Cardano founder Charles Hoskinson supported an FBI investigation into a network incident.
- A transaction submitted by Homer J partitioned the Cardano mainnet on November 21, creating two different chain histories.
- Teams from the Cardano Foundation, Intersect, and Input | Output worked together to fix the network and urged node operators to update their software.
- Hoskinson endorsed criminal charges against the implicated stake pool operator, describing the event as a premeditated attack.
- Kireev criticized Hoskinson’s decision to involve the FBI, citing concerns about safety and reputation within the Cardano community.
On November 21, a transaction submitted by Homer J caused a split in the Cardano mainnet, resulting in two separate blockchain histories. This incident led to an investigation supported by Charles Hoskinson, the founder of Cardano, and prompted a senior developer at Input | Output, Roman Kireev, to resign publicly. Kireev cited concerns about personal risk and the direction of the investigation.
Following the network partition, engineering teams from the Cardano Foundation, Intersect, and Input | Output formed a “war room” to manage the crisis. They worked to convince exchanges, Stake Pool Operators, and key node operators to implement a hotfix to restore network integrity. The incident involved a “poison transaction” that disrupted network consensus, creating a fork in the blockchain.
Hoskinson openly supported involving law enforcement, stating on X (formerly Twitter) that he supported criminal charges against the DAO Hacker. He described the attack as premeditated and orchestrated by a disgruntled stake pool operator, holding them responsible for disrupting a public network that functions under a constitution-like End User License Agreement (EULA).
Roman Kireev, who claims to have uncovered or originated most of the vulnerabilities in Cardano’s computational layer, expressed discontent about Hoskinson’s choice to involve the FBI. He stated he would require significant compensation to continue security work and later said he planned to continue working elsewhere within the broader Cardano ecosystem. Kireev also criticized Hoskinson for prematurely accusing someone to a large audience before a proper investigation, writing, “You wanna be a grown-up and call the feds? Be a grown-up and let them perform the investigation before you accuse anyone of being a criminal to a 1M audience.”
Despite Kireev’s resignation and criticism, Hoskinson reaffirmed his stance on involving the FBI as a necessary step. He emphasized the responsibility to protect millions of users’ property and to hold those who maliciously attack the network accountable.
The controversy sparked mixed reactions among the Cardano community. Some questioned Hoskinson’s public handling of the situation and the implications of involving federal authorities following a technical error described by the original transactor as an unintended experiment in “vibe coding.”
For detailed developments on the incident and responses from involved parties, see the original reports and network partition analysis by Intersect.
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