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listforwards localfail out_channel #5330

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rustyrussell
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There are more cases where we can populate out_channel; we definitely need to fix the case where we failed locally because the outgoing channel didn't have capacity, but we should also try anywhere that they gave us a channel to fwd to, even if it doesn't exist, for example.

@rustyrussell
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Rebase after scid aliases!

…possible.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This (will) happen if they ask is to forward to an unknown scid.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
They're not logically connected: we can know where they wanted to
go, but we didn't send it.

Where possible, it's the scid *they asked for*; otherwise, it's the
scid or fallback to the alias, but do this in the *caller*, not by
overriding inside wallet_forwarded_payment_add.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
There's one case where we can present more infomation, so do that, and
fix documentation.

Changelog-Added: JSON-RPC: `listforwards` now shows `out_channel` in more cases: even if it couldn't actually send to it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Fixes: ElementsProject#5329
@rustyrussell rustyrussell force-pushed the guilt/listforwards-localfail-out_channel branch from d6e3d79 to fdc3305 Compare July 9, 2022 03:23
@rustyrussell
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Fixed final patch: we can't set hout in db if it does not exist, as we get "Foreign constraint failed".

@rustyrussell rustyrussell force-pushed the guilt/listforwards-localfail-out_channel branch from fdc3305 to 090044a Compare July 9, 2022 05:48
@rustyrussell
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Rebased again, removed unrelated fixup which clashed with master rebase.

@niftynei
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ACK 090044a

lgtm, test failure is unrelated.

@rustyrussell rustyrussell merged commit 3127510 into ElementsProject:master Jul 11, 2022
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2 participants