// executeForceClose executes a unilateral close of the target channel by
// broadcasting the current commitment state directly on-chain. Once the
// commitment transaction has been broadcast, a struct describing the final
// state of the channel is sent to the utxoNursery in order to ultimatley sweep
// the immature outputs.
func (p *peer) executeForceClose(channel *lnwallet.LightningChannel) (*wire.ShaHash, error) {
// Execute a unilateral close shutting down all further channel
// operation.
closeSummary, err := channel.ForceClose()
if err != nil {
return nil, err
}
closeTx := closeSummary.CloseTx
txid := closeTx.TxSha()
// With the close transaction in hand, broadcast the transaction to the
// network, thereby entering the psot channel resolution state.
peerLog.Infof("Broadcasting force close transaction: %v",
channel.ChannelPoint(), newLogClosure(func() string {
return spew.Sdump(closeTx)
}))
if err := p.server.lnwallet.PublishTransaction(closeTx); err != nil {
return nil, err
}
// Send the closed channel summary over to the utxoNursery in order to
// have its outputs swept back into the wallet once they're mature.
p.server.utxoNursery.incubateOutputs(closeSummary)
return &txid, nil
}
