Fix HTLCs rexmit out of order #4124
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cdecker
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Oct 13, 2020
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We didn't care, but other implementations (particularly lnd) do. And it does violate the spec. (We need to use skip not xfail on the test which catches this, since xfail doesn't seem to stop errors reported by cleanup) (Includes Christian's typo fix!) Signed-off-by: Rusty Russell <[email protected]>
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[ Includes tidyups by Christian Decker ] Signed-off-by: Rusty Russell <[email protected]>
We had one report of this, and then Eugene and Roasbeef of Lightning Labs confirmed it; they saw misordered HTLCs on reconnection too. Since we didn't enforce this when we receive HTLCs, we never noticed :( Fixes: ElementsProject#3920 Signed-off-by: Rusty Russell <[email protected]> Changelog-Fixed: Protocol: fixed retransmission order of multiple new HTLCs (causing channel close with LND)
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As noted in this morning's spec call, I tracked it down.