Crate opentele2_grammers 

grammers 0.11 sessions and connection params from opentele2 accounts and API profiles, and back.

• session_data turns a tdata Account into a grammers_session::SessionData, ready for MemorySession::from or SessionData::import_to.
• account_from_session is its inverse: the home DC key and the self user of a SessionData become an Account.
• connection_params copies the initConnection fields of an ApiProfile into a grammers_mtsender::ConnectionParams.
• With the client feature (off by default), client runs the opentele2 client flows over grammers-client 0.11: QR login with DC migration and 2FA, the self user id, session admin, the seven consistency checks and tdata from a client session, over an Invoker that grammers_client::Client implements. Its module docs list the limits grammers 0.11 puts on those flows.

The core crate never depends on grammers; this crate is the optional bridge. The profile’s api_id is passed to grammers separately (for example to SenderPool::new), and its api_hash at sign-in.

Fingerprint gap

grammers 0.11 builds initConnection itself in SenderPool (grammers-mtsender sender_pool.rs) and always sends lang_pack: "" and params: None. ConnectionParams has no field for either, so the profile’s ApiProfile::lang_pack (tdesktop for the desktop profile) is dropped, and no params JSON object is sent. A session driven by grammers with a desktop profile is therefore not byte-identical on the wire to Telegram Desktop: the device, system, app and language fields match, those two do not.

Closing the gap needs an upstream change in grammers-mtsender: a lang_pack: String and a params: Option<JsonValue> field (the TL JSONValue) on ConnectionParams, defaulting to "" and None, which SenderPool copies into InitConnection in place of the hardcoded values. Once released, connection_params fills both from the profile.

Keys

SessionData and its DcOption derive Debug and print the raw auth key; do not log them. opentele2’s AuthKey prints its key id only.

Functions

account_from_session

The account at index for grammers session data: the key of the home DC and the user id of the self user, with the home DC as main DC.

connection_params

grammers connection params for profile: device_model, system_version, app_version, system_lang_code and lang_code from the profile, every other field the grammers default.

session_data

grammers session data for account.