BED (Back exchange decentralized) aims to reshape a decentralized financial exchange, with digital assets as the fundamental payment innovation ecosystem.Driven by blockchain encryption algorithms, BED can achieve seamless conversion between digital currency and fiat currency for individuals and enterprises through its practical payment landing applications. Breaking the current problems of long bank clearing time, limited transaction volume, and opaque transaction data, we will achieve real-time exchange rates for real-time remittance, transfer, and automatic calculation of contracts globally. Transaction confirmation will achieve second level settlement with zero cost....