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从 BTC 到 ETH 再到 FAB
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大家好，最近比特币 BTC 和以太币 ETH 的币价涨的非常迅猛，越来越多的小伙伴又开始关注区块链及加密货币了。最值得大家关注的应该是区块链 3.0 技术发链 FAB。尽管太多的项目号称是区块链 3.0，例如大名鼎鼎的EOS 和异常火爆的 Filecoin。但是对于这些项目，我只能说：他们没见过更厉害的。对于各种优化公链，只能称之为区块链 2.0 PLUS ，而对于 Filecoin 而言，只能称之为区块链 2.0 拓展包。真正的区块链 3.0 一定会将区块链的技术设计与思想哲学带到一个新的高度，而能做到这一点的，只有发链 FAB。
接下来，我将通过三个时代来阐述区块链 1.0，2.0 和 3.0 的发展脉络。
比特币时代
比特币的价值在于其实现了一个链式存储的结构。从创始区块开始，可以从后面的区块寻找到前面的区块，区块中的交易通过默克尔树进行组织。
比特币形成一个点对点的电子信息系统，实现可一个不可篡改的账本，在比特币的应用中，存储的是交易信息的记录。比特币的诞生引出了区块链的概念，如果把交易信息转变为其他的数据类型，就能够实现其他的功能。所以区块链也被称之为去中心化的数据库。
比特币的创新是开天辟地的，实现的是从 0 到 1 的过程，尽管比特币的交易速度一直被人诟病，但你大爷终将是你大爷，比特币坐稳了区块链 1.0 的头把交椅。以后就很难说是否能保持下去？
以太坊时代
以太坊实现一个更复杂的数据结构，相比于比特币，可以存储更复杂的数据，无论是账户还是链上变量的值都可以作为一个世界状态。
我们可以通过交易来改变世界状态的值，如账户的余额或者智能合约中的变量信息。基于这个特点，以太坊实现了其图灵完备性，于是以太坊就被称为世界计算机。
但以太坊更像是初代计算机 ENIAC，首先他的性能太差了，其次很难与其他计算机进行交流，最重要的是以太坊很难适应所有的应用场景。就好像全世界的芯片厂只生产一种CPU，无论是手机，电脑，甚至电冰箱，计算器都只有这一种 CPU，感觉是不是要疯。
如果这个问题不解决，区块链将难以落地。于是 EOS 就说，我的速度更快，Filecoin 说，我的存储更便宜，但这些都只起到了一些小作用，因为他们都没有解决最本质的问题。
这个问题很好理解，我们在上历史课的时候都知道从农业时代转向工业时代最重要的标志就是就是分工，专业的人应该去做专业的事情，这样生产力才能提高。区块链有那么多方向，每个方向都有好的设计，如何让这些项目能够相互协作，共同搭建成一个完整的生态，才是区块链 3.0 真正要做的。
FAB 时代 |
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