Protocol

Inline Protocol v1 carries Realtime V3. It uses the MTProto 2.0 secure-transport construction with Inline endpoints, keys, sessions, schema, and RPCs.

Construction

• Handshake: pinned RSA keys, RSA_PAD, finite-field DH, nonces, and transcript validation.
• Records: MTProto 2.0 KDF, AES-256-IGE, message keys, salts, sessions, message IDs, sequences, and direction checks.
• Authorization: permanent device key plus bound temporary keys.
• Temporary keys: 24-hour lifetime; rotate at 80%.
• Reliability: containers, ACKs, resend/state requests, cached results, clock correction, and replay rejection.
• Carrier: obfuscated abridged framing over binary WebSocket.
• Application: inline.invoke, inline.result, and inline.update contain Protocol Buffer bytes.
• No Telegram API or endpoint compatibility.

Specification

• Inline Protocol and Realtime V3
• Conformance vectors
• Production trust roots
• MTProto 2.0

Implementations

• TypeScript secure transport
• TypeScript V3 connection
• Rust secure transport
• Rust V3 connection