defi智能合约流动性质押挖矿分红系统开发（开发案例）丨defi流动性质押挖矿源码详细
智能合约事实上是由计算机代码构成的一段程序，其缔结过程是：第一步，参与缔约的双方或多方用户商定后将共同合意制定成一份智能合约;
第二步，该智能合约通过区块链网络向全球各个区块链的支点广播并存储;
第三步，构建成功的智能合约等待条件达成后自动执行合约内容。
Uniswap V1中ERC20代币的相互兑换主要是以ETH为中介进行，也就是说其中一种ERC20代币兑换成ETH，再由ETH兑换成目标ERC20代币
#notice Convert Tokens(self.token)to Tokens(token_addr).
#dev User specifies exact input and minimum output.
#param tokens_sold Amount of Tokens sold.支付的代币数量
开发详细I35流程7O98开发O7I8
#param min_tokens_bought Minimum Tokens(token_addr)purchased.购买的代币的最小值
#param min_eth_bought Minimum ETH purchased as intermediary.作为中介的ETH的最小值
#param deadline Time after which this transaction can no longer be executed.
#param token_addr The address of the token being purchased.目标代币的ERC20合约地址
#return Amount of Tokens(token_addr)bought.最终购买的代币数量
#根据输入的代币数量兑换相应数量的目标代币
关于区块链项目技术开发唯:MrsFu123，代币发行、dapp智能合约开发、链游开发、多链钱包开发
交易所开发、量化合约开发、互助游戏开发、Nft数字藏品开发、众筹互助开发、元宇宙开发、swap开发、
链上合约开发、ido开发、商城开发等，开发过各种各样的系统模式，更有多种模式、制度、案例、后台等，成熟技术团队，欢迎实体参考。
public
def tokenToTokenSwapInput(tokens_sold:uint256,min_tokens_bought:uint256,min_eth_bought:uint256(wei),deadline:timestamp,token_addr:address)->uint256:
#获得目标代币的兑换合约地址
exchange_addr:address=self.factory.getExchange(token_addr)
return self.tokenToTokenInput(tokens_sold,min_tokens_bought,min_eth_bought,deadline,msg.sender,msg.sender,exchange_addr)
#notice Convert Tokens(self.token)to Tokens(token_addr)and transfers
#Tokens(token_addr)to recipient.
#dev User specifies exact input and minimum output.
#param tokens_sold Amount of Tokens sold.支付的代币数量
#param min_tokens_bought Minimum Tokens(token_addr)purchased.购买的代币的最小值
#param min_eth_bought Minimum ETH purchased as intermediary.作为中介的ETH的最小值
#param deadline Time after which this transaction can no longer be executed.
#param recipient The address that receives output ETH.目标代币的接收者地址
#param token_addr The address of the token being purchased.目标代币的ERC20合约地址
#return Amount of Tokens(token_addr)bought.最终购买的代币数量
#根据输入的代币数量兑换相应数量的目标代币，并将目标代币发送给指定接收者
public
def tokenToTokenTransferInput(tokens_sold:uint256,min_tokens_bought:uint256,min_eth_bought:uint256(wei),deadline:timestamp,recipient:address,token_addr:address)->uint256:
exchange_addr:address=self.factory.getExchange(token_addr)
return self.tokenToTokenInput(tokens_sold,min_tokens_bought,min_eth_bought,deadline,msg.sender,recipient,exchange_addr)
#notice Convert Tokens(self.token)to Tokens(token_addr).
#dev User specifies maximum input and exact output.
#param tokens_bought Amount of Tokens(token_addr)bought.所要购买的代币数量
#param max_tokens_sold Maximum Tokens(self.token)sold.所要支付的代币的最大值
#param max_eth_sold Maximum ETH purchased as intermediary.作为中介的ETH的最大值
#param deadline Time after which this transaction can no longer be executed.
#param token_addr The address of the token being purchased.目标代币的ERC20合约地址
#return Amount of Tokens(self.token)sold.最终所需要支付的代币数量
#根据所要购买的目标代币数量支付相应数量的持有代币
public
def tokenToTokenSwapOutput(tokens_bought:uint256,max_tokens_sold:uint256,max_eth_sold:uint256(wei),deadline:timestamp,token_addr:address)->uint256:
exchange_addr:address=self.factory.getExchange(token_addr)
return self.tokenToTokenOutput(tokens_bought,max_tokens_sold,max_eth_sold,deadline,msg.sender,msg.sender,exchange_addr)
