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The full name of DCR currency is deced. DCR currency is an independent digital currency. Deced is a cryptocurrency, similar to bitcoin, which emphasizes community investment, open governance and sustainable capital and development. It uses a mixed "proof of work" and "proof of interest" mining system to ensure that a small group cannot dominate the transaction process or modify the deced without community input. A monetary unit is called'reduced'(DCR). To ensure the integrity of currency and prevent people from making fraudulent transactions or creating their own coins, deced uses the method of recording transactions called blockchain. Deced is a multi platform digital currency that supports windows, MacOS, and Linux. With the wallet application, you can send, receive and mine deced with just a few clicks, which is very easy to use. DCR is positioned as a digital currency with payment function, which is similar to bitcoin. Its main innovation lies in improving the process for communities to reach consensus on decision-making, with emphasis on community autonomy. Therefore, pow+pos mechanism is introduced to restrict possible mining tyrants, balance the interests of miners and coin holders as much as possible, and effectively reduce absenteeism. This system can also allow users to participate in the change of voting consensus mechanism. In addition to community governance, deced focuses on developing cross chain atomic swap transactions. The so-called atomic exchange is to use bitcoin's scripting language to build smart contracts and authorize cross chain transactions. The premise to realize such transactions is to find a method to solve the original image of hash function. The significance of atomic swap is to truly realize decentralization and abandon third-party institutions such as exchanges for asset trading.