ea397c9d6e
Sweeping anchors and being able to bump the fee was already added in a previous commit. This commit extends anchor sweeping with an anchor resolver object that becomes active after the commitment tx confirms. At that point, the anchors do not serve the purpose of getting the commitment tranaction confirmed anymore. It is however still possible to reclaim some of their value if using a low fee rate.
68 lines
2.7 KiB
Go
68 lines
2.7 KiB
Go
package contractcourt
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import (
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"io"
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"github.com/btcsuite/btcd/wire"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/htlcswitch/hop"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/invoices"
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"github.com/lightningnetwork/lnd/lntypes"
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"github.com/lightningnetwork/lnd/lnwallet/chainfee"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/sweep"
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)
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// Registry is an interface which represents the invoice registry.
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type Registry interface {
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// LookupInvoice attempts to look up an invoice according to its 32
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// byte payment hash.
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LookupInvoice(lntypes.Hash) (channeldb.Invoice, error)
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// NotifyExitHopHtlc attempts to mark an invoice as settled. If the
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// invoice is a debug invoice, then this method is a noop as debug
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// invoices are never fully settled. The return value describes how the
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// htlc should be resolved. If the htlc cannot be resolved immediately,
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// the resolution is sent on the passed in hodlChan later.
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NotifyExitHopHtlc(payHash lntypes.Hash, paidAmount lnwire.MilliSatoshi,
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expiry uint32, currentHeight int32,
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circuitKey channeldb.CircuitKey, hodlChan chan<- interface{},
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payload invoices.Payload) (invoices.HtlcResolution, error)
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// HodlUnsubscribeAll unsubscribes from all htlc resolutions.
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HodlUnsubscribeAll(subscriber chan<- interface{})
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}
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// OnionProcessor is an interface used to decode onion blobs.
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type OnionProcessor interface {
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// ReconstructHopIterator attempts to decode a valid sphinx packet from
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// the passed io.Reader instance.
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ReconstructHopIterator(r io.Reader, rHash []byte) (hop.Iterator, error)
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}
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// UtxoSweeper defines the sweep functions that contract court requires.
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type UtxoSweeper interface {
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// SweepInput sweeps inputs back into the wallet.
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SweepInput(input input.Input, params sweep.Params) (chan sweep.Result,
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error)
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// CreateSweepTx accepts a list of inputs and signs and generates a txn
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// that spends from them. This method also makes an accurate fee
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// estimate before generating the required witnesses.
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CreateSweepTx(inputs []input.Input, feePref sweep.FeePreference,
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currentBlockHeight uint32) (*wire.MsgTx, error)
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// RelayFeePerKW returns the minimum fee rate required for transactions
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// to be relayed.
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RelayFeePerKW() chainfee.SatPerKWeight
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// UpdateParams allows updating the sweep parameters of a pending input
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// in the UtxoSweeper. This function can be used to provide an updated
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// fee preference that will be used for a new sweep transaction of the
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// input that will act as a replacement transaction (RBF) of the
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// original sweeping transaction, if any.
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UpdateParams(input wire.OutPoint, params sweep.ParamsUpdate) (
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chan sweep.Result, error)
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}
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