The v2 message as a string; its UTF-8 encoding is the signed bytes. Hashing this directly avoids building intermediate buffers. See signatureMessage for the format.
Unix time in seconds.
Target name.
Fragment HTML.
Optional
Optional CSS; absent is the empty string.
The message text.
The v2 message as a string; its UTF-8 encoding is the signed bytes. Hashing this directly avoids building intermediate buffers. See signatureMessage for the format.