https://github.com/EOSIO/fc/blob/df5a17ef0704d7dd96c444bfd9a70506bcfbc057/include/fc/crypto/public_key.hpp#L11

namespace fc { namespace crypto {
   namespace config {
      constexpr const char* public_key_legacy_prefix = "EOS"; // 修改EOS为需要的前缀即可,如BSC