clarification: strict validation of scid for blinded payments #1147
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This PR updates bolt04 to more strictly enforce that
encrypted_dat
a that is part of a blinded payment only hasshort_channel_id
set. On the reader side, we disallow setting of bothshort_channel_id
andnext_node_id
(which is intended for use in the context of onion messages), and on the writer side we specify thatnext_node_id
should not be included by recipients.h/t: @ellemouton for flagging during review!