DAPP/LP/DEFI智能合约流动性质押挖矿系统开发（详细及方案）丨源码案例

　
智能合约事实上是由计算机代码构成的一段程序，其缔结过程是：第一步，参与缔约的双方或多方用户商定后将共同合意制定成一份智能合约;

　　第二步，该智能合约通过区块链网络向全球各个区块链的支点广播并存储;

　　第三步，构建成功的智能合约等待条件达成后自动执行合约内容。

　　pragma solidity=0.6.6;

　　interface IUniswapV2Factory{

　　event PairCreated(address indexed token0,address indexed token1,address pair,uint);

　　function feeTo()external view returns(address);

　　function feeToSetter()external view returns(address);

　　function getPair(address tokenA,address tokenB)external view returns(address pair);

　　function allPairs(uint)external view returns(address pair);

　　function allPairsLength()external view returns(uint);

　　function createPair(address tokenA,address tokenB)external returns(address pair);

　　function setFeeTo(address)external;

　　function setFeeToSetter(address)external;

　　}

　　interface IUniswapV2Pair{

　　event Approval(address indexed owner,address indexed spender,uint value);

　　event Transfer(address indexed from,address indexed to,uint value);

　　function name()external pure returns(string memory);

　　function symbol()external pure returns(string memory);

　　function decimals()external pure returns(uint8);

　　function totalSupply()external view returns(uint);

　　function balanceOf(address owner)external view returns(uint);

　　function allowance(address owner,address spender)external view returns(uint);

　　function approve(address spender,uint value)external returns(bool);

　　function transfer(address to,uint value)external returns(bool);

　　function transferFrom(address from,address to,uint value)external returns(bool);

　　function DOMAIN_SEPARATOR()external view returns(bytes32);