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lnwallet: move PaymentDescriptor definition to its own file

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This commit is contained in:
Keagan McClelland 2024-04-30 16:54:27 -07:00
parent b7c59b36a7
commit 39db0221f0
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GPG Key ID: FA7E65C951F12439
2 changed files with 224 additions and 214 deletions
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214
lnwallet/channel.go
View File

@ -167,220 +167,6 @@ func (e *ErrCommitSyncLocalDataLoss) Error() string {
// payments requested by the wallet/daemon. // payments requested by the wallet/daemon.
type PaymentHash [32]byte type PaymentHash [32]byte
// updateType is the exact type of an entry within the shared HTLC log.
type updateType uint8
const (
// Add is an update type that adds a new HTLC entry into the log.
// Either side can add a new pending HTLC by adding a new Add entry
// into their update log.
Add updateType = iota
// Fail is an update type which removes a prior HTLC entry from the
// log. Adding a Fail entry to one's log will modify the _remote_
// party's update log once a new commitment view has been evaluated
// which contains the Fail entry.
Fail
// MalformedFail is an update type which removes a prior HTLC entry
// from the log. Adding a MalformedFail entry to one's log will modify
// the _remote_ party's update log once a new commitment view has been
// evaluated which contains the MalformedFail entry. The difference
// from Fail type lie in the different data we have to store.
MalformedFail
// Settle is an update type which settles a prior HTLC crediting the
// balance of the receiving node. Adding a Settle entry to a log will
// result in the settle entry being removed on the log as well as the
// original add entry from the remote party's log after the next state
// transition.
Settle
// FeeUpdate is an update type sent by the channel initiator that
// updates the fee rate used when signing the commitment transaction.
FeeUpdate
)
// String returns a human readable string that uniquely identifies the target
// update type.
func (u updateType) String() string {
switch u {
case Add:
return "Add"
case Fail:
return "Fail"
case MalformedFail:
return "MalformedFail"
case Settle:
return "Settle"
case FeeUpdate:
return "FeeUpdate"
default:
return "<unknown type>"
}
}
// PaymentDescriptor represents a commitment state update which either adds,
// settles, or removes an HTLC. PaymentDescriptors encapsulate all necessary
// metadata w.r.t to an HTLC, and additional data pairing a settle message to
// the original added HTLC.
//
// TODO(roasbeef): LogEntry interface??
// - need to separate attrs for cancel/add/settle/feeupdate
type PaymentDescriptor struct {
// RHash is the payment hash for this HTLC. The HTLC can be settled iff
// the preimage to this hash is presented.
RHash PaymentHash
// RPreimage is the preimage that settles the HTLC pointed to within the
// log by the ParentIndex.
RPreimage PaymentHash
// Timeout is the absolute timeout in blocks, after which this HTLC
// expires.
Timeout uint32
// Amount is the HTLC amount in milli-satoshis.
Amount lnwire.MilliSatoshi
// LogIndex is the log entry number that his HTLC update has within the
// log. Depending on if IsIncoming is true, this is either an entry the
// remote party added, or one that we added locally.
LogIndex uint64
// HtlcIndex is the index within the main update log for this HTLC.
// Entries within the log of type Add will have this field populated,
// as other entries will point to the entry via this counter.
//
// NOTE: This field will only be populate if EntryType is Add.
HtlcIndex uint64
// ParentIndex is the HTLC index of the entry that this update settles or
// times out.
//
// NOTE: This field will only be populate if EntryType is Fail or
// Settle.
ParentIndex uint64
// SourceRef points to an Add update in a forwarding package owned by
// this channel.
//
// NOTE: This field will only be populated if EntryType is Fail or
// Settle.
SourceRef *channeldb.AddRef
// DestRef points to a Fail/Settle update in another link's forwarding
// package.
//
// NOTE: This field will only be populated if EntryType is Fail or
// Settle, and the forwarded Add successfully included in an outgoing
// link's commitment txn.
DestRef *channeldb.SettleFailRef
// OpenCircuitKey references the incoming Chan/HTLC ID of an Add HTLC
// packet delivered by the switch.
//
// NOTE: This field is only populated for payment descriptors in the
// *local* update log, and if the Add packet was delivered by the
// switch.
OpenCircuitKey *models.CircuitKey
// ClosedCircuitKey references the incoming Chan/HTLC ID of the Add HTLC
// that opened the circuit.
//
// NOTE: This field is only populated for payment descriptors in the
// *local* update log, and if settle/fails have a committed circuit in
// the circuit map.
ClosedCircuitKey *models.CircuitKey
// localOutputIndex is the output index of this HTLc output in the
// commitment transaction of the local node.
//
// NOTE: If the output is dust from the PoV of the local commitment
// chain, then this value will be -1.
localOutputIndex int32
// remoteOutputIndex is the output index of this HTLC output in the
// commitment transaction of the remote node.
//
// NOTE: If the output is dust from the PoV of the remote commitment
// chain, then this value will be -1.
remoteOutputIndex int32
// sig is the signature for the second-level HTLC transaction that
// spends the version of this HTLC on the commitment transaction of the
// local node. This signature is generated by the remote node and
// stored by the local node in the case that local node needs to
// broadcast their commitment transaction.
sig input.Signature
// addCommitHeight[Remote|Local] encodes the height of the commitment
// which included this HTLC on either the remote or local commitment
// chain. This value is used to determine when an HTLC is fully
// "locked-in".
addCommitHeightRemote uint64
addCommitHeightLocal uint64
// removeCommitHeight[Remote|Local] encodes the height of the
// commitment which removed the parent pointer of this
// PaymentDescriptor either due to a timeout or a settle. Once both
// these heights are below the tail of both chains, the log entries can
// safely be removed.
removeCommitHeightRemote uint64
removeCommitHeightLocal uint64
// OnionBlob is an opaque blob which is used to complete multi-hop
// routing.
//
// NOTE: Populated only on add payment descriptor entry types.
OnionBlob []byte
// ShaOnionBlob is a sha of the onion blob.
//
// NOTE: Populated only in payment descriptor with MalformedFail type.
ShaOnionBlob [sha256.Size]byte
// FailReason stores the reason why a particular payment was canceled.
//
// NOTE: Populate only in fail payment descriptor entry types.
FailReason []byte
// FailCode stores the code why a particular payment was canceled.
//
// NOTE: Populated only in payment descriptor with MalformedFail type.
FailCode lnwire.FailCode
// [our|their|]PkScript are the raw public key scripts that encodes the
// redemption rules for this particular HTLC. These fields will only be
// populated iff the EntryType of this PaymentDescriptor is Add.
// ourPkScript is the ourPkScript from the context of our local
// commitment chain. theirPkScript is the latest pkScript from the
// context of the remote commitment chain.
//
// NOTE: These values may change within the logs themselves, however,
// they'll stay consistent within the commitment chain entries
// themselves.
ourPkScript []byte
ourWitnessScript []byte
theirPkScript []byte
theirWitnessScript []byte
// EntryType denotes the exact type of the PaymentDescriptor. In the
// case of a Timeout, or Settle type, then the Parent field will point
// into the log to the HTLC being modified.
EntryType updateType
// isForwarded denotes if an incoming HTLC has been forwarded to any
// possible upstream peers in the route.
isForwarded bool
// BlindingPoint is an optional ephemeral key used in route blinding.
// This value is set for nodes that are relaying payments inside of a
// blinded route (ie, not the introduction node) from update_add_htlc's
// TLVs.
BlindingPoint lnwire.BlindingPointRecord
}
// PayDescsFromRemoteLogUpdates converts a slice of LogUpdates received from the // PayDescsFromRemoteLogUpdates converts a slice of LogUpdates received from the
// remote peer into PaymentDescriptors to inform a link's forwarding decisions. // remote peer into PaymentDescriptors to inform a link's forwarding decisions.
// //

224
lnwallet/payment_descriptor.go Normal file
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@ -0,0 +1,224 @@
package lnwallet
import (
"crypto/sha256"
"github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/channeldb/models"
"github.com/lightningnetwork/lnd/input"
"github.com/lightningnetwork/lnd/lnwire"
)
// updateType is the exact type of an entry within the shared HTLC log.
type updateType uint8
const (
// Add is an update type that adds a new HTLC entry into the log.
// Either side can add a new pending HTLC by adding a new Add entry
// into their update log.
Add updateType = iota
// Fail is an update type which removes a prior HTLC entry from the
// log. Adding a Fail entry to one's log will modify the _remote_
// party's update log once a new commitment view has been evaluated
// which contains the Fail entry.
Fail
// MalformedFail is an update type which removes a prior HTLC entry
// from the log. Adding a MalformedFail entry to one's log will modify
// the _remote_ party's update log once a new commitment view has been
// evaluated which contains the MalformedFail entry. The difference
// from Fail type lie in the different data we have to store.
MalformedFail
// Settle is an update type which settles a prior HTLC crediting the
// balance of the receiving node. Adding a Settle entry to a log will
// result in the settle entry being removed on the log as well as the
// original add entry from the remote party's log after the next state
// transition.
Settle
// FeeUpdate is an update type sent by the channel initiator that
// updates the fee rate used when signing the commitment transaction.
FeeUpdate
)
// String returns a human readable string that uniquely identifies the target
// update type.
func (u updateType) String() string {
switch u {
case Add:
return "Add"
case Fail:
return "Fail"
case MalformedFail:
return "MalformedFail"
case Settle:
return "Settle"
case FeeUpdate:
return "FeeUpdate"
default:
return "<unknown type>"
}
}
// PaymentDescriptor represents a commitment state update which either adds,
// settles, or removes an HTLC. PaymentDescriptors encapsulate all necessary
// metadata w.r.t to an HTLC, and additional data pairing a settle message to
// the original added HTLC.
//
// TODO(roasbeef): LogEntry interface??
// - need to separate attrs for cancel/add/settle/feeupdate
type PaymentDescriptor struct {
// RHash is the payment hash for this HTLC. The HTLC can be settled iff
// the preimage to this hash is presented.
RHash PaymentHash
// RPreimage is the preimage that settles the HTLC pointed to within the
// log by the ParentIndex.
RPreimage PaymentHash
// Timeout is the absolute timeout in blocks, after which this HTLC
// expires.
Timeout uint32
// Amount is the HTLC amount in milli-satoshis.
Amount lnwire.MilliSatoshi
// LogIndex is the log entry number that his HTLC update has within the
// log. Depending on if IsIncoming is true, this is either an entry the
// remote party added, or one that we added locally.
LogIndex uint64
// HtlcIndex is the index within the main update log for this HTLC.
// Entries within the log of type Add will have this field populated,
// as other entries will point to the entry via this counter.
//
// NOTE: This field will only be populate if EntryType is Add.
HtlcIndex uint64
// ParentIndex is the HTLC index of the entry that this update settles
// or times out.
//
// NOTE: This field will only be populate if EntryType is Fail or
// Settle.
ParentIndex uint64
// SourceRef points to an Add update in a forwarding package owned by
// this channel.
//
// NOTE: This field will only be populated if EntryType is Fail or
// Settle.
SourceRef *channeldb.AddRef
// DestRef points to a Fail/Settle update in another link's forwarding
// package.
//
// NOTE: This field will only be populated if EntryType is Fail or
// Settle, and the forwarded Add successfully included in an outgoing
// link's commitment txn.
DestRef *channeldb.SettleFailRef
// OpenCircuitKey references the incoming Chan/HTLC ID of an Add HTLC
// packet delivered by the switch.
//
// NOTE: This field is only populated for payment descriptors in the
// *local* update log, and if the Add packet was delivered by the
// switch.
OpenCircuitKey *models.CircuitKey
// ClosedCircuitKey references the incoming Chan/HTLC ID of the Add HTLC
// that opened the circuit.
//
// NOTE: This field is only populated for payment descriptors in the
// *local* update log, and if settle/fails have a committed circuit in
// the circuit map.
ClosedCircuitKey *models.CircuitKey
// localOutputIndex is the output index of this HTLc output in the
// commitment transaction of the local node.
//
// NOTE: If the output is dust from the PoV of the local commitment
// chain, then this value will be -1.
localOutputIndex int32
// remoteOutputIndex is the output index of this HTLC output in the
// commitment transaction of the remote node.
//
// NOTE: If the output is dust from the PoV of the remote commitment
// chain, then this value will be -1.
remoteOutputIndex int32
// sig is the signature for the second-level HTLC transaction that
// spends the version of this HTLC on the commitment transaction of the
// local node. This signature is generated by the remote node and
// stored by the local node in the case that local node needs to
// broadcast their commitment transaction.
sig input.Signature
// addCommitHeight[Remote|Local] encodes the height of the commitment
// which included this HTLC on either the remote or local commitment
// chain. This value is used to determine when an HTLC is fully
// "locked-in".
addCommitHeightRemote uint64
addCommitHeightLocal uint64
// removeCommitHeight[Remote|Local] encodes the height of the
// commitment which removed the parent pointer of this
// PaymentDescriptor either due to a timeout or a settle. Once both
// these heights are below the tail of both chains, the log entries can
// safely be removed.
removeCommitHeightRemote uint64
removeCommitHeightLocal uint64
// OnionBlob is an opaque blob which is used to complete multi-hop
// routing.
//
// NOTE: Populated only on add payment descriptor entry types.
OnionBlob []byte
// ShaOnionBlob is a sha of the onion blob.
//
// NOTE: Populated only in payment descriptor with MalformedFail type.
ShaOnionBlob [sha256.Size]byte
// FailReason stores the reason why a particular payment was canceled.
//
// NOTE: Populate only in fail payment descriptor entry types.
FailReason []byte
// FailCode stores the code why a particular payment was canceled.
//
// NOTE: Populated only in payment descriptor with MalformedFail type.
FailCode lnwire.FailCode
// [our|their|]PkScript are the raw public key scripts that encodes the
// redemption rules for this particular HTLC. These fields will only be
// populated iff the EntryType of this PaymentDescriptor is Add.
// ourPkScript is the ourPkScript from the context of our local
// commitment chain. theirPkScript is the latest pkScript from the
// context of the remote commitment chain.
//
// NOTE: These values may change within the logs themselves, however,
// they'll stay consistent within the commitment chain entries
// themselves.
ourPkScript []byte
ourWitnessScript []byte
theirPkScript []byte
theirWitnessScript []byte
// EntryType denotes the exact type of the PaymentDescriptor. In the
// case of a Timeout, or Settle type, then the Parent field will point
// into the log to the HTLC being modified.
EntryType updateType
// isForwarded denotes if an incoming HTLC has been forwarded to any
// possible upstream peers in the route.
isForwarded bool
// BlindingPoint is an optional ephemeral key used in route blinding.
// This value is set for nodes that are relaying payments inside of a
// blinded route (ie, not the introduction node) from update_add_htlc's
// TLVs.
BlindingPoint lnwire.BlindingPointRecord
}