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Block：修订间差异
以内容“Data is permanently recorded in the Bitcoin network through '''blocks'''. Each block contains all recent transactions, a nonce (random number), and the hash...”创建新页面 |
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Data is permanently recorded in the Bitcoin network through '''blocks'''. Each block contains all recent [[transactions]], a [[nonce]] (random number), and the [[hash]] of the previous block. A block is "solved" (published and considered valid by peers) when the SHA-256 hash of the entire block is below the current [[target]]. This is very unlikely to occur after being hashed only once, so the nonce must be incremented and the block re-hashed millions of times until it does. | Bitcoin网络中的数据永久记录在'''block''中。每个block都记录了最近的交易，一个[[nonce]]随机数，和它之前的block的散列值。当block的SHA-256散列值低于当前target时，它就“完成”了。一次散列计算就完成block的可能性很低，因此需要对nonce增量重新计算block散列直至完成。 | ||
<!-- Data is permanently recorded in the Bitcoin network through '''blocks'''. Each block contains all recent [[transactions]], a [[nonce]] (random number), and the [[hash]] of the previous block. A block is "solved" (published and considered valid by peers) when the SHA-256 hash of the entire block is below the current [[target]]. This is very unlikely to occur after being hashed only once, so the nonce must be incremented and the block re-hashed millions of times until it does. --> | |||
Bitcoin transactions are broadcast to the [[network]] by the sender, and all peers generating coins collect them and add them to the block they're working on. If the transaction is much larger than the average transaction size, a small [[transaction fee]] may be charged. | Bitcoin交易发生时，交易发起者会将这个交易广播到整个网络，所有铸币端都收集这一信息并将其加入正在生成的block中。如果交易量相比平均交易量大很多，则这笔交易可能被收取一定费用。 | ||
<!-- Bitcoin transactions are broadcast to the [[network]] by the sender, and all peers generating coins collect them and add them to the block they're working on. If the transaction is much larger than the average transaction size, a small [[transaction fee]] may be charged. --> | |||
The first transaction in the block is special: it creates new [[Bitcoins]] for the person who generated it. Other peers will only accept the block if this transaction is of the correct amount. The number of [[Bitcoins]] generated per block starts at 50 and is halved every 210,000 blocks (about four years). | block中的第一笔交易是特殊的：它为生成这个block的人创造新的比特币。仅当这笔交易的数量正确的时候，其他的端才会接受这个block。每个block生成的比特币数量是50，每生成210000个block(大约需要4年)，这个数字减半。 | ||
<!-- The first transaction in the block is special: it creates new [[Bitcoins]] for the person who generated it. Other peers will only accept the block if this transaction is of the correct amount. The number of [[Bitcoins]] generated per block starts at 50 and is halved every 210,000 blocks (about four years). --> | |||
The network tries to create 6 blocks per hour. Every 2016 blocks (about two weeks), all Bitcoin clients compare the actual number created with this goal and modify the target by the percentage that it varied. This increases (or decreases) the difficulty of generating blocks. | 网络预期每小时生成6个block。每生成2016个block(约花费2星期)，所有Bitcoin客户端将目标与实际生成数量做比较，并改变target。这将增加或降低生成block的难度 | ||
<!-- The network tries to create 6 blocks per hour. Every 2016 blocks (about two weeks), all Bitcoin clients compare the actual number created with this goal and modify the target by the percentage that it varied. This increases (or decreases) the difficulty of generating blocks. --> | |||
The client accepts the 'longest' chain of blocks as valid. The 'length' of the entire [[block chain]] refers to the chain with the most combined difficulty, not the one with the most blocks. This prevents someone from forking the chain and creating a large number of low-difficulty blocks, and having it accepted by the network as 'longest'. | |||
<!-- The client accepts the 'longest' chain of blocks as valid. The 'length' of the entire [[block chain]] refers to the chain with the most combined difficulty, not the one with the most blocks. This prevents someone from forking the chain and creating a large number of low-difficulty blocks, and having it accepted by the network as 'longest'. --> | |||
== Common Questions about Blocks == | == Common Questions about Blocks == | ||
2011年5月30日 (一) 07:33的版本
Bitcoin网络中的数据永久记录在'block中。每个block都记录了最近的交易，一个nonce随机数，和它之前的block的散列值。当block的SHA-256散列值低于当前target时，它就“完成”了。一次散列计算就完成block的可能性很低，因此需要对nonce增量重新计算block散列直至完成。
Bitcoin交易发生时，交易发起者会将这个交易广播到整个网络，所有铸币端都收集这一信息并将其加入正在生成的block中。如果交易量相比平均交易量大很多，则这笔交易可能被收取一定费用。
block中的第一笔交易是特殊的：它为生成这个block的人创造新的比特币。仅当这笔交易的数量正确的时候，其他的端才会接受这个block。每个block生成的比特币数量是50，每生成210000个block(大约需要4年)，这个数字减半。
网络预期每小时生成6个block。每生成2016个block(约花费2星期)，所有Bitcoin客户端将目标与实际生成数量做比较，并改变target。这将增加或降低生成block的难度
Common Questions about Blocks
How many blocks are there?
What is the maximum number of blocks?
There is no maximum number, blocks just keep getting added to the end of the chain at an average rate of one every 10 minutes.
Even when all 21 million coins have been generated?
Yes. The blocks are for proving that transactions existed at a particular time. Transactions will still occur once all the coins have been generated, so blocks will still be created as long as people are trading Bitcoins.
How long will it take me to generate a block?
No-one can say exactly. There is a generation calculator that will tell you how long it might take.
What if I'm 1% towards calculating a block and...?
There's no such thing as being 1% towards solving a block. You don't make progress towards solving it. After working on it for 24 hours, your chances of solving it are equal to what your chances were at the start or at any moment.
It's like trying to flip 37 coins at once and have them all come up heads. Each time you try, your chances of success are the same.
Where can I find more technical detail?
There is more technical detail on the block hashing algorithm page.
