COINBASE is selling Immigrations and Customs Enforcement a suite of features used to track and identify cryptocurrency users, according to contract documents.

In August 2021, Coinbase sold a single analytics software license to ICE for $29,000, followed by a software purchase potentially worth $1.36 million the next month, but details of exactly what capabilities would be offered to the agency’s controversial Homeland Security Investigations division of were unclear. A new contract document obtained by Jack Poulson, director of the watchdog group Tech Inquiry, shows ICE now has access to a variety of forensic features provided through Coinbase Tracer, the company’s intelligence-gathering tool (formerly known as Coinbase Analytics).

According to the document, released via a Freedom of Information Act request, ICE is now able to track transactions made through nearly a dozen different digital currencies, including Bitcoin, Ether, and Tether. Analytic features include “Multi-hop link Analysis for incoming and outgoing funds,” granting ICE insight into transfers of these currencies, as well as “Transaction demixing and shielded transaction analysis” aimed at thwarting methods some crypto users take to launder their funds or camouflage their transactions. The contract also provides, provocatively, “Historical geo tracking data,” though it’s unclear what exactly this data consists of or from where it’s sourced. An email released through the FOIA request shows that Coinbase didn’t require ICE to agree to an End User License Agreement, standard legalese that imposes limits on what a customer can do with software.

Coinbase has in recent years made a concerted effort to pitch its intelligence features to government agencies, including the IRS, Secret Service, and Drug Enforcement Administration. Earlier this month, Coinbase vice president of global intelligence John Kothanek testified before a congressional panel that his company was eager to aid the cause of Homeland Security. “If you are a cyber criminal and you’re using crypto, you’re going to have a bad day. … We are going to track you down and we’re going to find that finance and we are going to hopefully help the government seize that crypto.” Coinbase’s government work has proved highly controversial to many crypto fans, owing perhaps both to the long-running libertarian streak in that community and the fact that these currencies are so frequently used to facilitate various forms of fraud.