code: func HexToAddress(addr HexString) (common.Address, error) {
  	addrBytes, err := HexToBytes(addr)
  	if err != nil {
  		err = fmt.Errorf("unable to parse ethereum addr: %s", err)
  	}
  	return common.BytesToAddress(addrBytes), err
  }
docs: // HexToAddress returns ethereum's address from base 64 encoded string.