比特币:点对点货币的开源实现
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- Satoshi Nakamoto Institute
- Internet Archive — P2P Foundation 原始线程的早期快照
这是一个全球分布式数据库,经多数同意后才能向数据库添加内容,而这种同意基于他们遵循的一组规则:
- 每当有人找到工作量证明来生成一个区块时,他们就会获得一些新币 - 工作量证明难度每两周调整一次,目标是平均每小时生成 6 个区块(针对整个网络) - 每个区块发放的币量每 4 年减半
你可以说,币是由多数人发行的。它们以有限且预先确定的数量发行。
例如,如果有 1000 个节点,每小时有 6 个节点获得币,那么你很可能要等一周才能得到任何东西。
对于 Sepp 的问题,确实没有中央银行或联邦储备机构来随着用户群体增长调整货币供应量。那需要一个可信方来确定价值,因为我不知道有什么办法能让软件了解现实世界中事物的价值。如果存在某种巧妙的方法,或者我们愿意信任某人积极管理货币供应量,使其锚定某种东西,那么这些规则本来可以编程实现。
在这个意义上,它更像一种贵金属。供应量不是改变以维持价值不变,而是供应量预先确定,价值发生变化。随着用户数量增长,每枚币的价值都会上升。它有形成正反馈循环的潜力:用户增加,价值上涨,这可能吸引更多用户来利用不断增加的价值。
英文原文
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It is a global distributed database, with additions to the database by consent of the majority, based on a set of rules they follow:
- Whenever someone finds proof-of-work to generate a block, they get some new coins - The proof-of-work difficulty is adjusted every two weeks to target an average of 6 blocks per hour (for the whole network) - The coins given per block is cut in half every 4 years
You could say coins are issued by the majority. They are issued in a limited, predetermined amount.
As an example, if there are 1000 nodes, and 6 get coins each hour, it would likely take a week before you get anything.
To Sepp's question, indeed there is nobody to act as central bank or federal reserve to adjust the money supply as the population of users grows. That would have required a trusted party to determine the value, because I don't know a way for software to know the real world value of things. If there was some clever way, or if we wanted to trust someone to actively manage the money supply to peg it to something, the rules could have been programmed for that.
In this sense, it's more typical of a precious metal. Instead of the supply changing to keep the value the same, the supply is predetermined and the value changes. As the number of users grows, the value per coin increases. It has the potential for a positive feedback loop; as users increase, the value goes up, which could attract more users to take advantage of the increasing value.