(input_reserve * 1000) + (input_amount * 997) Tokens_bought = output_reserve = self.token.balanceOf(self) input_reserve = self.balance -msg.value input_amount = msg.value (Pool͕͍࣋ͬͯΔτʔΫϯྔ) (͜ͷϓʔϧ͕͍࣋ͬͯΔETHྔ) (ߪೖʹ༻͢ΔETHͷྔ) inputͷ߹ (outputͷ߹ҟͳΔ) ethToTokenSwapͷ߹