Fhenix, an Ethereum L2 developer focusing on data confidentiality, has completed a $15 million Series A financing round and launched its testnet. The round was led by Hack VC, with participation from Dao5, Amber Group, Primitive Ventures, GSR, Collider Ventures, among others. The Series A funding brings Fhenix's total funding to $22 million. In September last year, Fhenix secured a $7 million seed round led by Multicoin Capital and Collider Ventures.