單個池的交易過程

單個池的交易在exactInputSingle函數(shù)中：

function exactInputSingle(

uint256 amountIn,

address recipient,

SwapData memory data

)private returns(uint256 amountOut){

//將path解碼，獲取頭部的tokenIn,tokenOut,fee

(address tokenIn,address tokenOut,uint24 fee)=data.path.decodeFirstPool();

//因為交易池只保存了token x的價格，這里我們需要知道輸入的token是交易池x token還是y token

bool zeroForOne=tokenIn<tokenOut;

//完成交易

(int256 amount0,int256 amount1)=

getPool(tokenIn,tokenOut,fee).swap(

recipient,

zeroForOne,

amountIn.toInt256(),

zeroForOne?MIN_SQRT_RATIO:MAX_SQRT_RATIO,