Type Alias: LtpEvent

LtpEvent = { type: "enq"; } | { type: "ack"; } | { type: "nak"; } | { type: "eot"; } | { frame: AstmFrame; type: "frame"; }

An inbound protocol event the consumer feeds the reducer: one of the four LTP control signals (ENQ/ACK/NAK/EOT) read off the wire, or a frame the consumer already decoded with decodeAstmFrames (the reducer reuses the codec's trusted/checksum verdict, it never re-derives it).