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一提到金融,大家最先想到的恐怕就是银行。不管是转账、存款还是贷款,几乎都得通过银行来完成。这就是我们熟悉的中心化金融。银行,就是那个不可或缺的中心。 
# J6 F: G4 e" i! ]9 c但有没有一种可能,金融活动可以不再依赖银行这样的中间机构?答案就是DeFi,去中心化金融。 
) l0 g% E. J6 l/ H5 u+ E0 _在DeFi的世界里,一切金融操作都在区块链上完成,靠的是提前写好的智能合约自动执行。; _3 @! a3 i. |, y, e4 z 
没有柜台、没有信贷员、甚至没有银行,只有代码和规则。/ h8 B' P$ x5 C; o! i8 Q 
以借贷为例。 
1 Y" |% S! C8 N5 C& v7 O传统世界里,你想向银行贷款,得提交收入证明、抵押房产,签一堆文件,等银行审核通过后才能拿到钱。; K, m% {( R% ~+ O, p. j! @ 
而在DeFi中,这一切变得像在一个全自动的当铺里进行。你不用面对任何人,只需跟程序打交道。& z/ L5 p+ _  U( Z/ n) {. C: l 
这个当铺能运转,靠的是下面3个核心部件9 f- K0 ~; L% }+ c 
区块链好比一个公开的账本,记录所有交易,谁都不能篡改。比如在以太坊上记录了你的账户下有1000个以太币,你有这1000个以太币才能进行抵押借贷。 
! ?8 k+ ^, n% H+ B% r2 ?" h- P然后抵押借钱的关键在于,你抵押的资产到底值多少钱。* d/ f3 g/ ~# l' a 
传统金融中有专门的人来评估你的房产。在Defi中则依靠Chainlink 预言机,它负责实时汇报外部价格。比如说1个以太币3000美元。' |4 _: j# e% s( E0 ] 
有了区块链和预言机,当铺才知道了你抵押的资产值多少钱。但你能借多少钱,利息多少,钱从哪里来。; y6 H" g3 C- j  @& X# m, H8 [+ N4 q 
这些就是借贷协议层,这里就相当于当铺本体,规定了借贷行为的各种规则 
6 f1 n( B. t" v- y, S典型代表有 Aave 和 Compound。* b) `: M9 h/ P7 D4 C( C 
比如我们定义了资金池,所有想赚利息的人,把钱存进来的,形成了一个大资金池。这些钱就可以拿去借给别人。) V9 n) h& V) J 
你想借钱,就从池子里拿。你存钱进去,就相当于当了债主,能收到别人借钱的利息。 
, [* `; M; I# K+ w" g: k你想借100块钱,那你必须抵押价值至少150块的东西,防止你借钱跑了。; T% f7 _' ]3 J+ E( B 
万一你抵押的东西价格暴跌,只值120块了,机器人店员不会打电话催你,会直接把你抵押的东西卖掉,先把100块本金拿回来,保护资金池的安全。这个过程就叫清算,对你来说很无情,但对存钱的人来说很安全。 
& g* D: O1 \/ D这些零零散散的借贷协议,保证了当铺的运作。 
/ _$ h" I. e2 `9 i# a: EDeFi不是虚无的概念,它正在重构我们对金融的认知。当然,它仍处于早期阶段,高收益往往高风险,特别是智能合约漏洞和资产波动可能导致资产直接归零。 
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DeFi就是让你像呼叫外卖一样方便地搞定金融活动,闪电借贷省心又省力。 |   
 
 
 
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DeFi就是当铺才知道了你值多少钱,利息怎么算,都是靠代码操盘,不依赖中间机构。 |   
 
 
 
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DeFi就是靠代码和规则自动执行,让金融活动不再只能靠银行。 |   
 
 
 
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