March 2022
Intermediate to advanced
293 pages
5h 31m
Chinese
Content preview from 精通区块链
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分叉和竞争链 ｜ 81
超导币（
Unobtainium
）
超导币（
Unobtainium
）诞生于
2013
年，其名字来自工程术语，是一种极
为稀有的元素。正如其名，这种加密货币的流通量非常少，设定了
25
万
的上限并且开采时间超过
30
年。尽管这只是一个有趣的试验，试图创造
低通货膨胀的加密货币，但超导币和其他大多数加密货币一样经历了币价
波动，而且它的每日交易量很低（数百美元）。
鱼头币（
Coinye
）
在狗狗币之后不久，
2014
年出现了鱼头币（
Coinye
或者
Coinye West
），
该加密货币采用
Scrypt
算法并使用说唱歌手坎耶
·
韦斯特（
Kayne West
）
作为货币的迷因和吉祥物形象。在开发计划宣布后，开发商立马就收到了
坎耶
·
韦斯特的商标侵权通知。尽管很想推出该代币，但迫于法律的压力，
团队遗憾地结束了这个项目。
波特币（
PotCoin
）
许多银行依然认为大麻是有风险的，这导致大量拥有大麻销售许可企业不
得不克服经营中的各种障碍。
2014
年发布的波特币（
PotCoin
）是第一个
为某特定行业创造的加密货币。最初它只是莱特币的副本，但该项目最终
转向了权益证明，权益证明速度更快，依靠权益激励持有货币即可获利以
及使用常规签名进行交易。虽然尝试了许多营销举措，但受市场波动以及
监管原因，波特币被采用依旧困难重重。
3.5
区块链
2.0
除了比特币的分叉以外，也有从零构建起来的项目。事实上，许多竞争链为
了实现自己的目标，需要自己从区块链的基础上构建。本节介绍几个著名的
例子。
3.5.1 NXT
NXT
于
2013
年发布， ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.