Properties
inboundId?
cause?
id
seq
message?
raw stripped), when it fits handover.maxAnswerBytes.
interaction?
id, data, respondBy).
body?
ctx.body after the before('message') hooks (a voice transcript survives the hand-over).
type?
ctx.type after the hooks, when they changed it (a transcribed voice note becomes 'text').
lang?
ctx.lang as resolved for the message.