从技术角度来讲，智能合约被认为是网络服务器，只是这些服务器并不是使用IP地址架设在互联网上，而是架设在区块链上。从而可以在其上面运行特定的合约程序。
但是与网络服务器不同的是，所有人都可以看到智能合约，因为这些智能合约的代码和状态都在区块链上（假设区块链是公开的）。而且，与网络服务器不同的是，智能合约不依赖某个特定的硬件设备，事实上，智能合约的代码由所有参与挖矿的设备来执行。开发详细I35系统7O98模式O7I8
#notice Convert Tokens(self.token)to Tokens(exchange_addr.token).
#dev Allows trades through contracts that were not deployed from the same factory.
#dev User specifies exact input and minimum output.
#param tokens_sold Amount of Tokens sold.关于区块链项目技术开发唯:yy625019，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、
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#param min_tokens_bought Minimum Tokens(token_addr)purchased.
#param min_eth_bought Minimum ETH purchased as intermediary.
#param deadline Time after which this transaction can no longer be executed.
#param exchange_addr The address of the exchange for the token being purchased.
#return Amount of Tokens(exchange_addr.token)bought.
public
def tokenToExchangeSwapInput(tokens_sold:uint256,min_tokens_bought:uint256,min_eth_bought:uint256(wei),deadline:timestamp,exchange_addr:address)->uint256:
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(exchange_addr.token)and transfers
#Tokens(exchange_addr.token)to recipient.
#dev Allows trades through contracts that were not deployed from the same factory.
#dev User specifies exact input and minimum output.
#param tokens_sold Amount of Tokens sold.
#param min_tokens_bought Minimum Tokens(token_addr)purchased.
#param min_eth_bought Minimum ETH purchased as intermediary.
#param deadline Time after which this transaction can no longer be executed.
#param recipient The address that receives output ETH.
#param exchange_addr The address of the exchange for the token being purchased.
#return Amount of Tokens(exchange_addr.token)bought.
public
def tokenToExchangeTransferInput(tokens_sold:uint256,min_tokens_bought:uint256,min_eth_bought:uint256(wei),deadline:timestamp,recipient:address,exchange_addr:address)->uint256:
assert recipient!=self
return self.tokenToTokenInput(tokens_sold,min_tokens_bought,min_eth_bought,deadline,msg.sender,recipient,exchange_addr)
#notice Convert Tokens(self.token)to Tokens(exchange_addr.token).
#dev Allows trades through contracts that were not deployed from the same factory.
#dev User specifies maximum input and exact output.
#param tokens_bought Amount of Tokens(token_addr)bought.
#param max_tokens_sold Maximum Tokens(self.token)sold.
#param max_eth_sold Maximum ETH purchased as intermediary.
#param deadline Time after which this transaction can no longer be executed.
#param exchange_addr The address of the exchange for the token being purchased.
#return Amount of Tokens(self.token)sold.
public
def tokenToExchangeSwapOutput(tokens_bought:uint256,max_tokens_sold:uint256,max_eth_sold:uint256(wei),deadline:timestamp,exchange_addr:address)->uint256:
return self.tokenToTokenOutput(tokens_bought,max_tokens_sold,max_eth_sold,deadline,msg.sender,msg.sender,exchange_addr)
#notice Convert Tokens(self.token)to Tokens(exchange_addr.token)and transfers
#Tokens(exchange_addr.token)to recipient.
#dev Allows trades through contracts that were not deployed from the same factory.
#dev User specifies maximum input and exact output.
#param tokens_bought Amount of Tokens(token_addr)bought.
#param max_tokens_sold Maximum Tokens(self.token)sold.
#param max_eth_sold Maximum ETH purchased as intermediary.
#param deadline Time after which this transaction can no longer be executed.
#param recipient The address that receives output ETH.
#param token_addr The address of the token being purchased.
#return Amount of Tokens(self.token)sold.
public
def tokenToExchangeTransferOutput(tokens_bought:uint256,max_tokens_sold:uint256,max_eth_sold:uint256(wei),deadline:timestamp,recipient:address,exchange_addr:address)->uint256:
assert recipient!=self
return self.tokenToTokenOutput(tokens_bought,max_tokens_sold,max_eth_sold,deadline,msg.sender,recipient,exchange_addr)
