• Roman Storm was convicted for operating Tornado Cash under a money-transmission statute, despite its noncustodial design.
  • Legal experts warn this sets a precedent that could criminalize publishing open-source privacy tools in DeFi.
  • Legislative reforms like the BRCA in the CLARITY Act could protect future developers, but won’t retroactively help Storm.

The conviction of Tornado Cash developer Roman Storm is reverberating across the open-source and decentralized finance (DeFi) communities, with legal experts warning it sets a dangerous precedent for noncustodial software developers.

Storm was found guilty under 18 U.S.C. § 1960(b)(1)(C), a statute traditionally applied to custodial money transmitters, after prosecutors argued that deploying immutable smart contracts qualified as “money transmission.” Critics say this interpretation ignores long-standing FinCEN guidance from 2019, which explicitly exempts noncustodial software providers from Money Service Business liability.

“This is a dark day for crypto,” Ethereum core developer Preston van Loon said, echoing concerns that the verdict could chill innovation by making open-source publishing a legal risk.

Coin Center’s Peter Van Valkenburgh called the logic flawed.

“I can’t transfer your funds if I don’t have them in my possession and in my control,” Valkenburgh said.

The broader concern is jurisdictional overreach. The Southern District of New York claimed authority based on the mere fact that someone in Manhattan used Tornado Cash, potentially exposing any developer, anywhere, to U.S. prosecution if their code is used stateside.

The case has drawn comparisons to the DOJ’s treatment of large financial institutions implicated in major money laundering scandals, such as the 1MDB case involving Goldman Sachs, where settlements were reached without senior executive convictions.

By contrast, Storm, who never took custody of user funds, faces up to five years in prison on the lesser money-transmitter charge alone.

A Call for Legislative Reform

The Blockchain Regulatory Certainty Act (BRCA), included in the proposed CLARITY legislation, would codify that noncustodial developers are not money transmitters, aligning with FinCEN’s guidance.

While this would not apply retroactively to Storm’s case, advocates like Van Valkenburgh argue it is essential to prevent future prosecutions of similar scope.

SEC Commissioner Hester Peirce also weighed in, defending financial privacy as a constitutional right and warning against criminalizing privacy-enhancing code.

“Denying people financial privacy… undermines the fabric and freedoms of our families, communities, and nation,” she said.

Storm’s legal team plans to appeal to the Second Circuit Court of Appeals, focusing on the interpretation of “money transmission” and whether the jury was improperly restricted in evaluating the law. Coin Center is also pursuing a related civil suit in Texas.

For now, the verdict has raised alarms for every DeFi developer. Without legislative or judicial course correction, publishing open-source code that can be used for privacy could carry unprecedented legal risks.

Edited by Harshajit Sarmah