smite-ir: implement BuildChannelUpdate operation#110
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BuildChannelUpdate operation
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I initially bundled those SCID changes because I was refactoring nearby code while working on BuildChannelUpdate, and it felt like a natural cleanup,I've dropped them from this commit. If we still want to simplify tweak_short_channel_id → tweak_u64, I'll open it as a separate PR so it can be reviewed on its own merits. Force-pushed to 326a60a. |
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Enables programs that build signed
channel_updatemessages and sendthem to the target. The signature is computed internally over the double-SHA256 of the message body, using the supplied node secret key (per BOLT 7). All other wire fields are passed as variable inputs so they can be reused
and mutated by the existing IR machinery.
Ref: #71