DAO/IDO代币预售合约质押挖矿分红系统开发(开发案例)及源码详细
As a highly developed token economy with the characteristics of sustainability,openness,autonomy,and immersion,the metauniverse conforms to the development trend of modern economy.The main development paths of the metauniverse include the"big internet route"and the"blockchain based construction route".In the long run,the"blockchain based construction route"metauniverse can truly achieve the goal of a parallel digital world.However,internet giants are important builders of the metauniverse ecosystem,and the tamperability and interoperability provided by blockchains are crucial.
A blockchain is a structure that links data,including data and hash pointers to previous data.Usually,things are interrelated.Each transaction is recorded and published in the blockchain.The attributes we saw earlier ensure the security of intra blockchain transactions.
#notice Deposit ETH and Tokens(self.token)at current ratio to mint UNI tokens.
#dev min_liquidity does nothing when total UNI supply is 0.
#param min_liquidity Minimum number of UNI sender will mint if total UNI supply is greater than 0.用户能接受的最少流动性代币
#param max_tokens Maximum number of tokens deposited.Deposits max amount if total UNI supply is 0.用户想要提供的代币数量最大值。
#param deadline Time after which this transaction can no longer be executed.
#return The amount of UNI minted.所铸造的流动性代币数量
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#根据流动性池中ETH和代币的比例等比例添加两种币,并获得等比例份额的流动性代币
public
payable
def addLiquidity(min_liquidity:uint256,max_tokens:uint256,deadline:timestamp)->uint256:
开发功能I59源码2OO7详细3O69
assert deadline>block.timestamp and(max_tokens>0 and msg.value>0)
total_liquidity:uint256=self.totalSupply#获得流动性代币总供应量
if total_liquidity>0:#非该池子第一次添加流动性
assert min_liquidity>0#添加的流动性最小也要大于0
eth_reserve:uint256(wei)=self.balance-msg.value#获得ETH储备量
token_reserve:uint256=self.token.balanceOf(self)#获得代币储备量
#根据投入的ETH数量计算需要投入的代币数量
#最后+1是手动向上取整,防止默认的向下取整减少流动性池应收的代币数量,进而逐渐稀释份额
token_amount:uint256=msg.value*token_reserve/eth_reserve+1
#计算需要铸造的流动性代币数量
#这里不向上取整是为了保证铸造的流动性代币价值<代币价值以防止流动性代币价值的稀释
liquidity_minted:uint256=msg.value*total_liquidity/eth_reserve
assert max_tokens>=token_amount and liquidity_minted>=min_liquidity
self.balances[msg.sender]+=liquidity_minted#铸造流动性代币并发放给提供者
self.totalSupply=total_liquidity+liquidity_minted#更新流动性代币总供应量
assert self.token.transferFrom(msg.sender,self,token_amount)#收取代币
log.AddLiquidity(msg.sender,msg