pub fn encode_text_message(text: &str) -> Vec<[u8; 3]>Expand description
Encode a text message into eight scrambled 3-byte slow-data payloads.
The output is always exactly 8 payloads (4 blocks × 2 halves) for any non-empty input. Empty input returns an empty vector.
Messages longer than 20 characters are truncated; shorter messages are right-padded with ASCII spaces.