Cryptocurrency derivatives exchange LedgerX has accused former U.S. Commodity Futures Trading Commission Chairman J. Christopher Giancarlo of carrying out a revenge campaign. LedgerX wrote two letters of complaining about Giancarlo to the CFTC in July, Coindesk reported September 28. Giancarlo is known as “Crypto-Dad” because of his favorable view of the cryptocurrency industry. Coindesk obtained the letters, written on July 3 and July 11 from the CFTC via a Freedom of Information Act request. In them, LedgerX CEO Paul Chou claimed Giancarlo deliberately sabotaged and delayed its vital derivatives clearing organization (DCO) license application. “In January, the Chairman called one of our board members and told him that he was going…