Joseph Delong’s desk looks less like a developer’s workstation these days and more like an electronics repair shop, littered with technology that crypto was pioneered to replace.

That’s because the veteran Ethereum developer and former SushiSwap CTO has accumulated what he describes as a “box of goodies” while building a stablecoin credit card network called Colossus—from point-of-sale test terminals to card readers and manufacturer sample books.

“Trying to get my hands on the hardware, it’s like this arcane knowledge that nobody could get access to,” Delong told Decrypt from his home office in San Antonio, Texas.

Consisting of four employees, the company expects its Ethereum layer-2 scaling network to…