什么是社交新零售
社交新零售，以社交赋能新零售模式，提升零售效率为目的的企业升级解决方案。社交新零售，是在消费升级时代，企业构建以消费者为中心的先进模式，从而获得竞争优势和效率提升。
Public bus system:a simple example is to show that all the people in the country are in the same area,with two points on the first floor,four points on the second floor,eight points on the third floor,and rows horizontally.After the first floor is occupied,the next floor is arranged again,and the second floor is copied,that is to say,the length is increased.
def buy(self,consumed_token_amount,consumed_token_address=ETH_ADDRESS,slippage=0.01,timeout=900,speed=1):
gas_price=int(self.web3.eth.gasPrice*speed)
consumed_token_address=Web3.toChecksumAddress(consumed_token_address)
received_amount=self.received_amount_by_swap(consumed_token_amount,consumed_token_address)
min_out=int(received_amount*(1-slippage))
if consumed_token_address==self.ETH_ADDRESS:
func=self.router.functions.swapExactETHForTokens(min_out,[consumed_token_address,self.address],
self.wallet_address,int(time.time()+timeout))
params=self.create_transaction_params(value=consumed_token_amount,gas_price=gas_price)
else:
if not self.is_approved(consumed_token_address,consumed_token_amount):
self.approve(consumed_token_address,gas_price=gas_price,timeout=timeout)
func=self.router.functions.swapExactTokensForTokens(consumed_token_amount,min_out,
[consumed_token_address,self.address],
self.wallet_address,int(time.time()+timeout))
params=self.create_transaction_params(gas_price=gas_price)
return self.send_transaction(func,params)
consumed_token_address：设置所支付的代币的erc20合约地址。
consumed_token_amount：设置所支付的代币数量。
slippage：设置所能容忍的滑点，默认为百分之一。
timeout：设置该笔交易的超时时间。
speed：设置该笔交易的区块确认速度，通过平均的gas_price乘以speed设置该笔交易的gas_price，所以speed的值越大，gas_price也越大，使得该笔交易的确认速度也越快。
