從本質(zhì)上看，區(qū)塊鏈?zhǔn)且苑植际綌?shù)據(jù)存儲(chǔ)、點(diǎn)對(duì)點(diǎn)傳輸、共識(shí)機(jī)制、加密算法、,智能合約等計(jì)算機(jī)技術(shù)集成創(chuàng)新而產(chǎn)生的分布式賬本技術(shù)，It is an Internet based Distributed database,featuring decentralization,consensus mechanism,tamper proof,traceability,transparent rules,etc,

　　區(qū)塊鏈?zhǔn)欠植际綌?shù)據(jù)存儲(chǔ)、點(diǎn)對(duì)點(diǎn)傳輸、共識(shí)機(jī)制、加密算法等計(jì)算機(jī)技術(shù)的新型應(yīng)用模式。

　　if(flippedLower){

　　tickBitmap.flipTick(tickLower,tickSpacing);

　　secondsOutside.initialize(tickLower,tick,tickSpacing,blockTimestamp);

　　}

　　if(flippedUpper){

　　tickBitmap.flipTick(tickUpper,tickSpacing);

　　secondsOutside.initialize(tickUpper,tick,tickSpacing,blockTimestamp);

　　}

　　function update(

　　mapping(int24=>Tick.Info)storage self,

　　int24 tick,

　　int24 tickCurrent,

　　int128 liquidityDelta,

　　uint256 feeGrowthGlobal0X128,

　　uint256 feeGrowthGlobal1X128,

　　bool upper,

　　uint128 maxLiquidity

　　)internal returns(bool flipped){

　　Tick.Info storage info=self[tick];

　　uint128 liquidityGrossBefore=info.liquidityGross;

　　uint128 liquidityGrossAfter=LiquidityMath.addDelta(liquidityGrossBefore,liquidityDelta);

　　require(liquidityGrossAfter<=maxLiquidity,'LO');

　　//通過liquidityGross在進(jìn)行position變化前后的值

　　//來判斷tick是否仍被引用

　　flipped=(liquidityGrossAfter==0)!=(liquidityGrossBefore==0);

　　...

　　info.liquidityGross=liquidityGrossAfter;

　　//更新liquidityNet的值，對(duì)于upper tick，

　　info.liquidityNet=upper

　　?int256(info.liquidityNet).sub(liquidityDelta).toInt128()

　　:int256(info.liquidityNet).add(liquidityDelta).toInt128();

　　}