Читать книгу Cryptocurrency All-in-One For Dummies онлайн

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Unlike PoW, a proof-of-stake (PoS) system requires you to show ownership of a certain amount of money (or stake). That means the more crypto you own, the more mining power you have. This approach eliminates the need for the expensive mining extravaganza. And because the calculations are pretty simple to prove, you own a certain percentage of the total amount of the cryptos available.

Another difference is that the PoS system offers no block rewards, so the miners get transaction fees. That’s how PoS cryptos can be several thousand times more cost-effective than PoW ones. (Don’t let the PoS abbreviation give you the wrong idea.)

Proof of importance (PoI) was first introduced by a blockchain platform called NEM to support its XEM cryptocurrency. In some ways, PoI is similar to PoS because participants (nodes) are marked as “eligible” if they have a certain amount of crypto “vested.” Then the network gives a “score” to the eligible nodes, and they can create a block that is roughly the same proportion to that “score.” But the difference is that the nodes won’t get a higher score only by holding onto more cryptocurrencies. Other variables are considered in the score, too, in order to resolve the primary problem with PoS, which is hoarding. The NEM community, in particular, uses a method called “harvesting” to solve the PoS “hoarding” problem.