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***网络向全球系统-176搭建-0206+可电可微-5616各个***的支点广播并存储
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,addres