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contractcourt/channel_arbitrator: handle onchain close race on restart

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This commit is contained in:
Conner Fromknecht 2018-08-23 03:50:55 -07:00
parent 4f43c1c943
commit d706e40ff7
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GPG Key ID: E7D737B67FA592C7
1 changed files with 32 additions and 2 deletions
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34
contractcourt/channel_arbitrator.go
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@ -509,6 +509,30 @@ func (c *ChannelArbitrator) stateStep(triggerHeight uint32,
// commitment transaction. We enter this state either due to an outside
// sub-system, or because an on-chain action has been triggered.
case StateBroadcastCommit:
// Under normal operation, we can only enter
// StateBroadcastCommit via a user or chain trigger. On restart,
// this state may be reexecuted after closing the channel, but
// failing to commit to StateContractClosed or
// StateFullyResolved. In that case, one of the three close
// triggers will be presented, signifying that we should skip
// rebroadcasting, and go straight to resolving the on-chain
// contract or marking the channel resolved.
switch trigger {
case localCloseTrigger, remoteCloseTrigger:
log.Infof("ChannelArbitrator(%v): detected %s "+
"close after closing channel, fast-forwarding "+
"to %s to resolve contract",
c.cfg.ChanPoint, trigger, StateContractClosed)
return StateContractClosed, closeTx, nil
case coopCloseTrigger:
log.Infof("ChannelArbitrator(%v): detected %s "+
"close after closing channel, fast-forwarding "+
"to %s to resolve contract",
c.cfg.ChanPoint, trigger, StateFullyResolved)
return StateFullyResolved, closeTx, nil
}
log.Infof("ChannelArbitrator(%v): force closing "+
"chan", c.cfg.ChanPoint)
@ -564,7 +588,7 @@ func (c *ChannelArbitrator) stateStep(triggerHeight uint32,
// We are waiting for a commitment to be confirmed, so any
// other trigger will be ignored.
case chainTrigger, userTrigger:
log.Infof("ChannelArbitrator(%v): noop state %v",
log.Infof("ChannelArbitrator(%v): noop trigger %v",
c.cfg.ChanPoint, trigger)
nextState = StateCommitmentBroadcasted
@ -572,10 +596,16 @@ func (c *ChannelArbitrator) stateStep(triggerHeight uint32,
// commitments being confirmed, then we'll jump to the state
// where the contract has been closed.
case localCloseTrigger, remoteCloseTrigger:
log.Infof("ChannelArbitrator(%v): state %v, "+
log.Infof("ChannelArbitrator(%v): trigger %v, "+
" going to StateContractClosed",
c.cfg.ChanPoint, trigger)
nextState = StateContractClosed
case coopCloseTrigger:
log.Infof("ChannelArbitrator(%v): trigger %v, "+
" going to StateFullyResolved",
c.cfg.ChanPoint, trigger)
nextState = StateFullyResolved
}
// If we're in this state, then the contract has been fully closed to