Bitcoin allows for 2-out-of-3 (theoretically also m-out-of-n) transactions. Buyer and seller can agree on an mediator for dispute settlement. https://www.bitra

Bitcoin allows for 2-out-of-3 (theoretically also m-out-of-n) transactions. Buyer and seller can agree on an mediator for dispute settlement. https://www.bitrated.com/ https://www.bitrated.com/