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Things I found on the way to #4599 completion.

We set amounts to a list, but then don't use the values except
as a boolean.

Make it a boolean, which should also speed the test up!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Show amount they were trying to pay with, not invoice amount.
Also, show min fee in closing, not fee they offered.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Makes for easier postmortem.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We were actually using the last commit tx's size, since we were
setting it in lightningd.  Instead, hand the min and desired feerates
to closingd, and (as it knows the weight of the closing tx), and have
it start negotiation from there.

This can be significantly less when anchor outputs are enabled: for
example in test_closing.py, the commit tx weight is 1124 Sipa, the
close is 672 Sipa!

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Changelog-Changed: Protocol: Use a more accurate fee for mutual close negotiation.
@rustyrussell rustyrussell added this to the v0.10.1 milestone Jun 29, 2021
@rustyrussell rustyrussell requested a review from cdecker as a code owner June 29, 2021 04:35
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ack 88616c7

@rustyrussell rustyrussell merged commit 8f33f46 into ElementsProject:master Jun 30, 2021
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2 participants