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cnct/contract_resolvers: reliably publish commit sweep

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This commit is contained in:
Conner Fromknecht 2018-09-18 00:22:38 -07:00
parent 1b0d8e8f13
commit b7aebd92cf
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GPG Key ID: E7D737B67FA592C7
1 changed files with 22 additions and 7 deletions
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29
contractcourt/contract_resolvers.go
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@ -1258,18 +1258,33 @@ func (c *commitSweepResolver) Resolve() (ContractResolver, error) {
log.Infof("%T(%v): sweeping commit output with tx=%v", c,
c.chanPoint, spew.Sdump(c.sweepTx))
// Finally, we'll broadcast the sweep transaction to the
// network.
if err := c.PublishTx(c.sweepTx); err != nil {
// With the sweep transaction constructed, we'll now Checkpoint
// our state.
if err := c.Checkpoint(c); err != nil {
log.Errorf("unable to Checkpoint: %v", err)
return nil, err
}
// With the sweep transaction checkpointed, we'll now publish
// the transaction. Upon restart, the resolver will immediately
// take the case below since the sweep tx is checkpointed.
err := c.PublishTx(c.sweepTx)
if err != nil && err != lnwallet.ErrDoubleSpend {
log.Errorf("%T(%v): unable to publish sweep tx: %v",
c, c.chanPoint, err)
return nil, err
}
// With the sweep transaction confirmed, we'll now Checkpoint
// our state.
if err := c.Checkpoint(c); err != nil {
log.Errorf("unable to Checkpoint: %v", err)
// If the sweep transaction has been generated, and the remote party
// broadcast the commit transaction, we'll republish it for reliability
// to ensure it confirms. The resolver will enter this case after
// checkpointing in the case above, ensuring we reliably on restarts.
case c.sweepTx != nil && !isLocalCommitTx:
err := c.PublishTx(c.sweepTx)
if err != nil && err != lnwallet.ErrDoubleSpend {
log.Errorf("%T(%v): unable to publish sweep tx: %v",
c, c.chanPoint, err)
return nil, err
}
// Otherwise, this is our commitment transaction, So we'll obtain the