multi: implement spec-compliant coop close#6760

Closed

Crypt-iQ wants to merge 14 commits intolightningnetwork:masterfrom Crypt-iQ:coop_close_970

+1,882-680

Commits on Feb 8, 2023

multi: expose ability to persist delivery script
Crypt-iQ
committed
channeldb: persist shutdown info with channel, add helper funcs
Crypt-iQ
committed
chancloser+peer: modify ChanCloser to not enter negotiation until clean
Crypt-iQ
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chancloser+peer: introduce cleanOnRecv to ChanCloser
Crypt-iQ
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peer: introduce HandleCoopReady which allows ChanCloser to advance state
Crypt-iQ
committed
htlcswitch+peer: pass Shutdown messages to the ChannelLink
Crypt-iQ
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multi: replace ShutdownIfChannelClean with NotifyShouldShutdown
Crypt-iQ
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htlcswitch+peer: let channelLink send Shutdown
Crypt-iQ
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htlcswitch+peer: add Shutdown retransmission logic to the link
Crypt-iQ
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htlcswitch: fail back HTLCs from Switch if link is in the Shutdown phase
Crypt-iQ
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htlcswitch: fail the link if peer sends HTLC after sending Shutdown
Crypt-iQ
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htlcswitch+server.go: remove LocalChannelClose, use NotifyShouldShutdown
Crypt-iQ
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rpcserver.go: remove the ActiveHtlcs check when coop closing
Crypt-iQ
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htlcswitch: appease linter regarding unrelated test code
Crypt-iQ
committed