Pledge and liquid mining are well known.Recently,the two have been combined-liquid pledge and liquid pledge.The English name is Liquid Staging,which refers to the process in which users obtain liquidity through their pledged assets.Liquidity pledge allows investors to pledge their assets,and also allows the holders of pledged assets to obtain liquidity in the form of derivative tokens.
什么是流动性mining？流动性mining主要是通过提供通证资产进而获取收益。简单来说就是，存入某些通证资产便可对其进行mining。存入某些通证资产便可对其进行mining。之所以会被称为mining也是因为保留了BTCmining的行业说法。流动性的衡量标准？
从定义中可以看出，市场的流动性是否良好，可以从四个维度进行衡量：
1）交易速度。The faster the transaction is completed,the better the liquidity of the market.
2）交易价格。The closer the transaction price is to the"fair price"or"dominant price",that is,the smaller the"slip point"we often say,the better the liquidity.
3）交易深度。Trading depth can be used to measure the price stability of the market.The greater the depth,the smaller the impact of a certain number of transactions on the price.
4）交易弹性。Elasticity refers to the speed at which the price returns to the"fair price"after a certain number of transactions cause the price to deviate from the equilibrium level.The better the liquidity,the faster the price recovery.
流动性mining怎么挖？
流动性mining与称为自动化做市商（AMM）的模型密切相关。它通常与流动性提供者（LP）和流动性capital池相关。那它是如何工作的呢？
LP将capital存入流动capital池，那么该capital池就为市场提供了动力，用户可以在其中出借、借用或交换代币。使用这些平台会产生相应的手续费用，然后根据其在流动capital池中的份额将其支付给LP。这也是自动化市商（AMM）工作原理的基础。
代币的发行规则将取决于协议的一种实现方式。z重要的是，Lp会根据他们向capital池中提供的流动性数量获得相应回报。LP存入的capital通常是与美元挂钩的稳定币，尽管这不是普遍的要求。
DeFi中使用的一些z常见稳定币是DAI、USDT、USDC、BUSD等。某些协议会生产出相应代币，这些代币可以代表你在系统中存入的capital。
如何获取合约？
pragma solidity^0.4.24;
contract HelloWorld{
string name;
function HelloWorld(){
name="Hello,World!";
}
function get()constant returns(string){
return name;
}
function set(string n){
name=n;
}
}
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函数(Functions)
function get()constant returns(string){
return name;
}
function set(string n){
name=n;
}
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事件（Events）
//事件的声明
event AddMsg(address indexed sender,bytes32 msg);
//事件的使用
function setData(int256 x)public{
storedData=x;
AddMsg(msg.sender,"in the set()method");
}
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结构类型(Structs Types)
contract Contract{
struct Data{
uint deadline;
uint amount;
}
Data data;
function set(uint id,uint deadline,uint amount){
data.deadline=deadline;
data.amount=amount;
}
}
