SSH key pair (defaults to ~/.ssh/id_ed25519)
Single-character pairs only. Multi-character confusables (rn vs m, cl vs d) are outside scope. These are a known gap in confusables.txt itself.，这一点在im钱包官方下载中也有详细论述
Performance: Supporting thousands of concurrent players was hard，这一点在safew官方下载中也有详细论述
append has to allocate one. Because it doesn’t know how big the