Jack Dorsey’s company Block is making another big move to make Bitcoin part of everyday commerce. Its payments arm, Square, has launched a new service called Square Bitcoin, where U.S. businesses can accept bitcoin payments, convert sales into bitcoin and manage their holdings from the same platform they use to process card payments and track sales. The new tools are designed to make using Bitcoin as easy as using a credit card, and bring Bitcoin to Main Street. For the first year, sellers will pay no processing fees when accepting bitcoin. “We’re making Bitcoin payments as seamless as card payments …