DAPP马蹄链系统开发（方案及项目）丨DAPP马蹄链系统开发（源码详情）

　　Metaverse is a virtual world constructed by humans using digital technology,mapped or transcended by the real world,and can interact with the real world.It is a digital living space with a new social system.

　　The"meta universe"itself is not a new technology,but rather integrates a large number of existing technologies,including 5G,cloud computing,artificial intelligence,virtual reality,blockchain,the Internet of Things,human-computer interaction,and so on.

　　pragma solidity=0.5.16;

　　import'./interfaces/IUniswapV2Pair.sol';

　　import'./UniswapV2ERC20.sol';

　　import'./libraries/Math.sol';

　　import'./libraries/UQ112x112.sol';

　　import'./interfaces/IERC20.sol';

　　import'./interfaces/IUniswapV2Factory.sol';

　　import'./interfaces/IUniswapV2Callee.sol';

　　contract UniswapV2Pair is IUniswapV2Pair,UniswapV2ERC20{

　　using SafeMath for uint;

　
　　using UQ112x112 for uint224;

　　uint public constant MINIMUM_LIQUIDITY=10**3;

　　bytes4 private constant SELECTOR=bytes4(keccak256(bytes('transfer(address,uint256)')));

　　address public factory;

　　address public token0;

　　address public token1;

　　uint112 private reserve0;//uses single storage slot,accessible via getReserves

　　uint112 private reserve1;//uses single storage slot,accessible via getReserves

　　uint32 private blockTimestampLast;//uses single storage slot,accessible via getReserves

　　uint public price0CumulativeLast;

　　uint public price1CumulativeLast;

　
　　Smart contracts are fully functional,flexible and controllable programs that can be invoked on distributed ledgers,with the advantages of transparency,trustworthiness,automatic execution,and mandatory performance.When it is deployed to a distributed ledger,the code of the program is transparent.