NEM Coin (XEM) is a cryptocurrency made by UtopianFuture (a BitcoinTalk Forum User) in March 2015. NEM stands for New Economy Movement and it was started as a fork of NXT. However, the code has been thoroughly re-written in C++ giving rise to an entirely new codebase. It is a dual-layered blockchain solution that will power the Smart Asset Solution, a blockchain solution built on top of API calls.

The Smart Asset Solution is an innovative introduction to the blockchain space as it basically means that developers will not need to run any special NEM software as all functionality is accessed through API calls, increasing the efficiency in the development process for building dApps on the NEM blockchain. This greatly increases the flexibility for developers as it allows them to not only build dApps that can access the NEM API directly but also mix these API Calls with other server data whilst having NEM running in the background.

NEM also employs an innovative consensus algorithm that has been dubbed as Proof-of-Importance (PoI). PoI gives rise to a secure and decentralized network in which all nodes are well behaved as the system assigns an importance score that determines how often it can harvest XEM. Think of harvesting as mining; the higher a node's importance score, the more mining it can do. The importance is derived from users Vesting coins, a process where coins are locked up, similar to staking. The coins become "Vested" over time, increasing the importance score. Users need to have at least 10,000 XEM to be assigned an importance score.

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