ba+utxno: final pass for formatting
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Conner Fromknecht
parent
47356493f3
commit
ec288ddf5b
@ -33,47 +33,47 @@ var retributionBucket = []byte("retribution")
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// BreachConfig bundles the required subsystems used by the breach arbiter. An
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// instance of BreachConfig is passed to newBreachArbiter during instantiation.
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type BreachConfig struct {
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// Signer is used by the breach arbiter to generate sweep transactions,
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// which move coins from previously open channels back to the user's
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// wallet.
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Signer lnwallet.Signer
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// DB provides access to the user's channels, allowing the breach
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// arbiter to determine the current state of a user's channels, and how
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// it should respond to channel closure.
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DB *channeldb.DB
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// PublishTransaction facilitates the process of broadcasting a
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// transaction to the network.
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PublishTransaction func(*wire.MsgTx) error
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// Notifier provides a publish/subscribe interface for event driven
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// notifications regarding the confirmation of txids.
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Notifier chainntnfs.ChainNotifier
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// ChainIO is used by the breach arbiter to determine the current height
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// of the blockchain, which is required to subscribe for spend
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// notifications from Notifier.
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ChainIO lnwallet.BlockChainIO
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// Estimator is used by the breach arbiter to determine an appropriate
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// fee level when generating, signing, and broadcasting sweep
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// transactions.
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Estimator lnwallet.FeeEstimator
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// CloseLink allows the breach arbiter to shutdown any channel links for
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// which it detects a breach, ensuring now further activity will
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// continue across the link. The method accepts link's channel point and a
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// close type to be included in the channel close summary.
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CloseLink func(*wire.OutPoint, htlcswitch.ChannelCloseType)
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// DB provides access to the user's channels, allowing the breach
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// arbiter to determine the current state of a user's channels, and how
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// it should respond to channel closure.
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DB *channeldb.DB
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// Estimator is used by the breach arbiter to determine an appropriate
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// fee level when generating, signing, and broadcasting sweep
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// transactions.
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Estimator lnwallet.FeeEstimator
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// GenSweepScript generates the receiving scripts for swept outputs.
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GenSweepScript func() ([]byte, error)
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// Notifier provides a publish/subscribe interface for event driven
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// notifications regarding the confirmation of txids.
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Notifier chainntnfs.ChainNotifier
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// PublishTransaction facilitates the process of broadcasting a
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// transaction to the network.
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PublishTransaction func(*wire.MsgTx) error
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// Signer is used by the breach arbiter to generate sweep transactions,
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// which move coins from previously open channels back to the user's
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// wallet.
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Signer lnwallet.Signer
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// Store is a persistent resource that maintains information regarding
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// breached channels. This is used in conjunction with DB to recover
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// from crashes, restarts, or other failures.
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Store RetributionStore
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// GenSweepScript generates the receiving scripts for swept outputs.
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GenSweepScript func() ([]byte, error)
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}
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// breachArbiter is a special subsystem which is responsible for watching and
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@ -212,9 +212,8 @@ func (b *breachArbiter) Start() error {
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channelsToWatch := make([]*lnwallet.LightningChannel, 0, nActive)
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for _, chanState := range activeChannels {
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// Initialize active channel from persisted channel state.
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channel, err := lnwallet.NewLightningChannel(
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nil, b.cfg.Notifier, b.cfg.Estimator, chanState,
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)
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channel, err := lnwallet.NewLightningChannel(nil,
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b.cfg.Notifier, b.cfg.Estimator, chanState)
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if err != nil {
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brarLog.Errorf("unable to load channel from "+
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"disk: %v", err)
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@ -320,8 +319,7 @@ func (b *breachArbiter) watchForPendingCloseConfs(currentHeight int32) error {
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closeTXID := pendingClose.ClosingTXID
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confNtfn, err := b.cfg.Notifier.RegisterConfirmationsNtfn(
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&closeTXID, 1, uint32(currentHeight),
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)
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&closeTXID, 1, uint32(currentHeight))
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if err != nil {
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return err
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}
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@ -424,8 +422,7 @@ out:
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// ensure we're not dealing with a moving target.
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breachTXID := &breachInfo.commitHash
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cfChan, err := b.cfg.Notifier.RegisterConfirmationsNtfn(
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breachTXID, 1, uint32(currentHeight),
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)
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breachTXID, 1, uint32(currentHeight))
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if err != nil {
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brarLog.Errorf("unable to register for conf "+
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"updates for txid: %v, err: %v",
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@ -806,8 +803,7 @@ type SpendableOutput interface {
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// BuildWitness returns a valid witness allowing this output to be
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// spent, the witness should be attached to the transaction at the
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// location determined by the given `txinIdx`.
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BuildWitness(signer lnwallet.Signer,
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txn *wire.MsgTx,
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BuildWitness(signer lnwallet.Signer, txn *wire.MsgTx,
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hashCache *txscript.TxSigHashes,
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txinIdx int) ([][]byte, error)
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}
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@ -865,8 +861,7 @@ func (bo *breachedOutput) BuildWitness(signer lnwallet.Signer,
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// been initialized for this breached output.
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if bo.witnessFunc == nil {
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bo.witnessFunc = bo.witnessType.GenWitnessFunc(
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signer, &bo.signDesc,
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)
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signer, &bo.signDesc)
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}
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// Now that we have ensured that the witness generation function has
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@ -921,22 +916,16 @@ func newRetributionInfo(chanPoint *wire.OutPoint,
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// witness in the event of failures, as it will be persisted in the
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// retribution store. Here we use CommitmentNoDelay since this output
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// belongs to us and has no time-based constraints on spending.
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selfOutput := newBreachedOutput(
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&breachInfo.LocalOutpoint,
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lnwallet.CommitmentNoDelay,
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&breachInfo.LocalOutputSignDesc,
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)
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selfOutput := newBreachedOutput(&breachInfo.LocalOutpoint,
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lnwallet.CommitmentNoDelay, &breachInfo.LocalOutputSignDesc)
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// Second, record the same information and witness type regarding the
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// remote outpoint, which belongs to the party who tried to steal our
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// money! Here we set witnessType of the breachedOutput to
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// CommitmentRevoke, since we will be using a revoke key, withdrawing
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// the funds from the commitment transaction immediately.
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revokedOutput := newBreachedOutput(
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&breachInfo.RemoteOutpoint,
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lnwallet.CommitmentRevoke,
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&breachInfo.RemoteOutputSignDesc,
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)
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revokedOutput := newBreachedOutput(&breachInfo.RemoteOutpoint,
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lnwallet.CommitmentRevoke, &breachInfo.RemoteOutputSignDesc)
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// Determine the number of second layer HTLCs we will attempt to sweep.
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nHtlcs := len(breachInfo.HtlcRetributions)
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@ -1115,9 +1104,8 @@ func (b *breachArbiter) sweepSpendableOutputsTxn(txWeight uint64,
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// First, we construct a valid witness for this outpoint and
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// transaction using the SpendableOutput's witness generation
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// function.
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witness, err := so.BuildWitness(
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b.cfg.Signer, txn, hashCache, idx,
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)
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witness, err := so.BuildWitness(b.cfg.Signer, txn, hashCache,
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idx)
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if err != nil {
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return err
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}
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@ -786,8 +786,7 @@ func fetchGraduatingOutputs(db *channeldb.DB, wallet *lnwallet.LightningWallet,
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// output or not.
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for _, kgtnOutput := range kgtnOutputs {
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kgtnOutput.witnessFunc = kgtnOutput.witnessType.GenWitnessFunc(
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wallet.Cfg.Signer, kgtnOutput.signDescriptor,
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)
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wallet.Cfg.Signer, kgtnOutput.signDescriptor)
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}
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utxnLog.Infof("New block: height=%v, sweeping %v mature outputs",
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