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palladum-lightning/hsmd
Rusty Russell e8a38f111d hsmd: create an hsm variant to sign a bolt12 invoice using a tweak on our key.
The current interface, if given a tweak, uses a *different secret key*
and tweaks it.  This was an early experiment: we will switch to using
a secret tweak for invoice_requests like we do for invoice path ids.

To make sure there's no funny business, *hsmd* hashes to form the
tweak (i.e. no zero tweaks!).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2024-08-01 12:31:48 +09:30
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