channeld: don't ever send back-to-back feerate changes, fix feerate logic. #4480
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Needs a nice changelog message :-) ACK 16ea05f |
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We don't always get two transactions on line 1019; the comment is confused (only one penalty tx successfully comes out of l3). So make sure we get the other transactions when we expect them, and then make this test more specific. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
There are several reports of desynchronization with LND here; a simple approach is to only have one feerate change in flight at any time. Even if this turns out to be our fault, it's been a historic area of confusion, so this restriction seems reasonable. Changelog-Fixed: Protocol: Don't create more than one feerate change at a time, as this seems to desync with LND. Fixes: ElementsProject#4152 Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
By iterating through them forward, we would often increment them more than once! Always print feestate transitions, which is how I worked this out. Changelog-Fixed: Protocol: handle complex feerate transitions correctly. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This may have made our feestates fully resolved, so we can send update_fee again. Without this fix our tests sometimes timeout. Also add debugging so we can see when we suppressed a feechange. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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ACK bf7947b |
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There are several reports of desynchronizaion with LND here; a simple
approach is to only have one feerate change in flight at any time.
But I also found that our fee state machine was a bit screwed (thanks to CI flake!), so that may also have caused this problem.
Fixes: #4152