真正實現(xiàn)以大數(shù)據(jù)、云計算、人工智能、沉浸現(xiàn)實等諸多新技術實現(xiàn)聯(lián)通，并且真正構建起一個完整的全新世界的，正是區(qū)塊鏈技術。這便是區(qū)塊鏈的功能。透過元宇宙，我們真正看到了區(qū)塊鏈技術的這樣一種聯(lián)通、融合的角色與作用；透過元宇宙，我們看到了區(qū)塊鏈技術的這樣一種建構于生態(tài)之上的強大的能力。 //performs chained getAmountOut calculations on any number of pairs //根據(jù)path,計算出每個交易對的輸入/輸出量(如果path>2,前一個交易對的輸出量，就是下一個交易對交易的輸入量) //內部實際還是調用的上面getAmountOut方法，返回值amounts長度和path的長度一致， function getAmountsOut(address factory,uint amountIn,address[]memory path)internal view returns(uint[]memory amounts){ require(path.length>=2,'UniswapV2Library:INVALID_PATH'); amounts=new uint[](path.length);//創(chuàng)建數(shù)組 amounts[0]=amountIn;//0位置是輸入量 for(uint i;i<path.length-1;i++){//每兩個token組成一個交易對，計算out (uint reserveIn,uint reserveOut)=getReserves(factory,path<i>,path[i+1]); amounts[i+1]=getAmountOut(amounts<i>,reserveIn,reserveOut); }開發(fā)需求及模板I35源碼7O98開發(fā)O7I8 } //performs chained getAmountIn calculations on any number of pairs //根據(jù)path,計算出每個交易對的輸入/輸出量(如果path>2,前一個交易對的輸出量，就是下一個交易對交易的輸入量) //內部實際還是調用的上面getAmountIn方法，返回值amounts長度和path的長度一致， function getAmountsIn(address factory,uint amountOut,address[]memory path)internal view returns(uint[]memory amounts){ require(path.length>=2,'UniswapV2Library:INVALID_PATH'); amounts=new uint[](path.length); amounts[amounts.length-1]=amountOut;//最后一個是入?yún)ut, for(uint i=path.length-1;i>0;i--){//倒序遍歷計算 (uint reserveIn,uint reserveOut)=getReserves(factory,path[i-1],path<i>); amounts[i-1]=getAmountIn(amounts<i>,reserveIn,reserveOut); } } }設計方案：MrsFu123 //helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false //轉賬工具類 library TransferHelper{ function safeApprove(address token,address to,uint value)internal{ //bytes4(keccak256(bytes('approve(address,uint256)'))); (bool success,bytes memory data)=token.call(abi.encodeWithSelector(0x095ea7b3,to,value)); require(success&&(data.length==0||abi.decode(data,(bool))),'TransferHelper:A