pub const BACKUP_ALGORITHM: &str = "m.megolm_backup.v1.aes-hmac-sha2";Expand description
The one key-backup algorithm this server accepts (plan P9 brief, MSC3270
naming) — m.megolm_backup.v1.curve25519-aes-sha2 (the PkEncryption
backup) is refused outright, never even reaching storage.