...哈希值 `2bc188b1f661ad0cc363d2f4be284e96ecc3851590930eada61a200e8ae539a3`
- 只取前20个字节
- `2bc188b1f661ad0cc363d2f4be284e96ecc38515`
按照[官方文档](https://eips.ethereum.org/EIPS/eip-55)的描述转换规则
> In English, convert the address to hex, but if the `i`th digit ...