Uniswap V2里的相关计算公式

计算下一个区块的baseFee的方式 §

export const calcNextBlockBaseFee = (curBlock) => {
  const baseFee = curBlock.baseFeePerGas; //取得当前块的 base gas  40.075439165
  const gasUsed = curBlock.gasUsed;  // 取得当前块的 gasUsed  27438201 
  const targetGasUsed = curBlock.gasLimit.div(2); // 当前块的 gasLimit 的一半 30,000,000/2
  const delta = gasUsed.sub(targetGasUsed); // 27438201 - 15000000   12438201
 
  const newBaseFee = baseFee.add(
    baseFee.mul(delta).div(targetGasUsed).div(ethers.BigNumber.from(8))
  );
  // newBaseFee = baseFee+ (baseFee * del)/(8 * targetGaseUsed)
   // 40.075439165 + (40.075439165 * 12438201 )/(8 * 15000000)
 
  // Add 0-9 wei so it becomes a different hash each time
  // newBaseFee 很接近下一个的区块的baseFee了
  const rand = Math.floor(Math.random() * 10);  // 增加一个随机值
  return newBaseFee.add(rand);
};