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doc: document that sendonion doesn't have to specify (but can!) the first_hop channel.

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This was always the case, though it was ignored.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Rusty Russell 2022-08-09 07:49:18 +09:30 • committed by neil saitug
parent 054339e0cb
commit fcba09dc33
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doc/lightning-sendonion.7.md
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@ -42,6 +42,10 @@ to add an HTLC for 1002 millisatoshis and a delay of 21 blocks on top of the cur
}
```
If the first element of *route* does not have "channel" set, a
suitable channel (if any) will be chosen, otherwise that specific
short-channel-id is used.
The *payment_hash* parameter specifies the 32 byte hex-encoded hash to use as
a challenge to the HTLC that we are sending. It is specific to the onion and
has to match the one the onion was created with.