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store.go
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store.go
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package instantout
import (
"bytes"
"context"
"database/sql"
"fmt"
"github.com/btcsuite/btcd/btcec/v2"
"github.com/btcsuite/btcd/btcutil"
"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/wire"
"github.com/lightninglabs/loop/fsm"
"github.com/lightninglabs/loop/instantout/reservation"
"github.com/lightninglabs/loop/loopdb"
"github.com/lightninglabs/loop/loopdb/sqlc"
"github.com/lightningnetwork/lnd/clock"
"github.com/lightningnetwork/lnd/keychain"
"github.com/lightningnetwork/lnd/lntypes"
"github.com/lightningnetwork/lnd/lnwallet/chainfee"
)
// InstantOutBaseDB is the interface that contains all the queries generated
// by sqlc for the instantout table.
type InstantOutBaseDB interface {
// InsertSwap inserts a new base swap.
InsertSwap(ctx context.Context, arg sqlc.InsertSwapParams) error
// InsertHtlcKeys inserts the htlc keys for a swap.
InsertHtlcKeys(ctx context.Context, arg sqlc.InsertHtlcKeysParams) error
// InsertInstantOut inserts a new instant out swap.
InsertInstantOut(ctx context.Context,
arg sqlc.InsertInstantOutParams) error
// InsertInstantOutUpdate inserts a new instant out update.
InsertInstantOutUpdate(ctx context.Context,
arg sqlc.InsertInstantOutUpdateParams) error
// UpdateInstantOut updates an instant out swap.
UpdateInstantOut(ctx context.Context,
arg sqlc.UpdateInstantOutParams) error
// GetInstantOutSwap retrieves an instant out swap.
GetInstantOutSwap(ctx context.Context,
swapHash []byte) (sqlc.GetInstantOutSwapRow, error)
// GetInstantOutSwapUpdates retrieves all instant out swap updates.
GetInstantOutSwapUpdates(ctx context.Context,
swapHash []byte) ([]sqlc.InstantoutUpdate, error)
// GetInstantOutSwaps retrieves all instant out swaps.
GetInstantOutSwaps(ctx context.Context) ([]sqlc.GetInstantOutSwapsRow,
error)
// ExecTx allows for executing a function in the context of a database
// transaction.
ExecTx(ctx context.Context, txOptions loopdb.TxOptions,
txBody func(*sqlc.Queries) error) error
}
// ReservationStore is the interface that is required to load the reservations
// based on the stored reservation ids.
type ReservationStore interface {
// GetReservation returns the reservation for the given id.
GetReservation(ctx context.Context, id reservation.ID) (
*reservation.Reservation, error)
}
type SQLStore struct {
baseDb InstantOutBaseDB
reservationStore ReservationStore
clock clock.Clock
network *chaincfg.Params
}
// NewSQLStore creates a new SQLStore.
func NewSQLStore(db InstantOutBaseDB, clock clock.Clock,
reservationStore ReservationStore, network *chaincfg.Params) *SQLStore {
return &SQLStore{
baseDb: db,
clock: clock,
reservationStore: reservationStore,
}
}
// CreateInstantLoopOut adds a new instant loop out to the store.
func (s *SQLStore) CreateInstantLoopOut(ctx context.Context,
instantOut *InstantOut) error {
swapArgs := sqlc.InsertSwapParams{
SwapHash: instantOut.SwapHash[:],
Preimage: instantOut.swapPreimage[:],
InitiationTime: s.clock.Now(),
AmountRequested: int64(instantOut.Value),
CltvExpiry: instantOut.CltvExpiry,
MaxMinerFee: 0,
MaxSwapFee: 0,
InitiationHeight: instantOut.initiationHeight,
ProtocolVersion: int32(instantOut.protocolVersion),
Label: "",
}
htlcKeyArgs := sqlc.InsertHtlcKeysParams{
SwapHash: instantOut.SwapHash[:],
SenderScriptPubkey: instantOut.serverPubkey.
SerializeCompressed(),
ReceiverScriptPubkey: instantOut.clientPubkey.
SerializeCompressed(),
ClientKeyFamily: int32(instantOut.keyLocator.Family),
ClientKeyIndex: int32(instantOut.keyLocator.Index),
}
reservationIdByteSlice := reservationIdsToByteSlice(
instantOut.Reservations,
)
instantOutArgs := sqlc.InsertInstantOutParams{
SwapHash: instantOut.SwapHash[:],
Preimage: instantOut.swapPreimage[:],
SweepAddress: instantOut.sweepAddress.String(),
OutgoingChanSet: instantOut.outgoingChanSet.String(),
HtlcFeeRate: int64(instantOut.htlcFeeRate),
ReservationIds: reservationIdByteSlice,
SwapInvoice: instantOut.swapInvoice,
}
updateArgs := sqlc.InsertInstantOutUpdateParams{
SwapHash: instantOut.SwapHash[:],
UpdateTimestamp: s.clock.Now(),
UpdateState: string(instantOut.State),
}
return s.baseDb.ExecTx(ctx, &loopdb.SqliteTxOptions{},
func(q *sqlc.Queries) error {
err := q.InsertSwap(ctx, swapArgs)
if err != nil {
return err
}
err = q.InsertHtlcKeys(ctx, htlcKeyArgs)
if err != nil {
return err
}
err = q.InsertInstantOut(ctx, instantOutArgs)
if err != nil {
return err
}
return q.InsertInstantOutUpdate(ctx, updateArgs)
})
}
// UpdateInstantLoopOut updates an existing instant loop out in the
// store.
func (s *SQLStore) UpdateInstantLoopOut(ctx context.Context,
instantOut *InstantOut) error {
// Serialize the FinalHtlcTx.
var finalHtlcTx []byte
if instantOut.finalizedHtlcTx != nil {
var buffer bytes.Buffer
err := instantOut.finalizedHtlcTx.Serialize(
&buffer,
)
if err != nil {
return err
}
finalHtlcTx = buffer.Bytes()
}
var finalSweeplessSweepTx []byte
if instantOut.FinalizedSweeplessSweepTx != nil {
var buffer bytes.Buffer
err := instantOut.FinalizedSweeplessSweepTx.Serialize(
&buffer,
)
if err != nil {
return err
}
finalSweeplessSweepTx = buffer.Bytes()
}
var sweepTxHash []byte
if instantOut.SweepTxHash != nil {
sweepTxHash = instantOut.SweepTxHash[:]
}
updateParams := sqlc.UpdateInstantOutParams{
SwapHash: instantOut.SwapHash[:],
FinalizedHtlcTx: finalHtlcTx,
SweepTxHash: sweepTxHash,
FinalizedSweeplessSweepTx: finalSweeplessSweepTx,
SweepConfirmationHeight: serializeNullInt32(
int32(instantOut.sweepConfirmationHeight),
),
}
updateArgs := sqlc.InsertInstantOutUpdateParams{
SwapHash: instantOut.SwapHash[:],
UpdateTimestamp: s.clock.Now(),
UpdateState: string(instantOut.State),
}
return s.baseDb.ExecTx(ctx, &loopdb.SqliteTxOptions{},
func(q *sqlc.Queries) error {
err := q.UpdateInstantOut(ctx, updateParams)
if err != nil {
return err
}
return q.InsertInstantOutUpdate(ctx, updateArgs)
},
)
}
// GetInstantLoopOut returns the instant loop out for the given swap
// hash.
func (s *SQLStore) GetInstantLoopOut(ctx context.Context, swapHash []byte) (
*InstantOut, error) {
row, err := s.baseDb.GetInstantOutSwap(ctx, swapHash)
if err != nil {
return nil, err
}
updates, err := s.baseDb.GetInstantOutSwapUpdates(ctx, swapHash)
if err != nil {
return nil, err
}
return s.sqlInstantOutToInstantOut(ctx, row, updates)
}
// ListInstantLoopOuts returns all instant loop outs that are in the
// store.
func (s *SQLStore) ListInstantLoopOuts(ctx context.Context) ([]*InstantOut,
error) {
rows, err := s.baseDb.GetInstantOutSwaps(ctx)
if err != nil {
return nil, err
}
var instantOuts []*InstantOut
for _, row := range rows {
updates, err := s.baseDb.GetInstantOutSwapUpdates(
ctx, row.SwapHash,
)
if err != nil {
return nil, err
}
instantOut, err := s.sqlInstantOutToInstantOut(
ctx, sqlc.GetInstantOutSwapRow(row), updates,
)
if err != nil {
return nil, err
}
instantOuts = append(instantOuts, instantOut)
}
return instantOuts, nil
}
// sqlInstantOutToInstantOut converts sql rows to an instant out struct.
func (s *SQLStore) sqlInstantOutToInstantOut(ctx context.Context,
row sqlc.GetInstantOutSwapRow, updates []sqlc.InstantoutUpdate) (
*InstantOut, error) {
swapHash, err := lntypes.MakeHash(row.SwapHash)
if err != nil {
return nil, err
}
swapPreImage, err := lntypes.MakePreimage(row.Preimage)
if err != nil {
return nil, err
}
serverKey, err := btcec.ParsePubKey(row.SenderScriptPubkey)
if err != nil {
return nil, err
}
clientKey, err := btcec.ParsePubKey(row.ReceiverScriptPubkey)
if err != nil {
return nil, err
}
var finalizedHtlcTx *wire.MsgTx
if row.FinalizedHtlcTx != nil {
finalizedHtlcTx = &wire.MsgTx{}
err := finalizedHtlcTx.Deserialize(bytes.NewReader(
row.FinalizedHtlcTx,
))
if err != nil {
return nil, err
}
}
var finalizedSweepLessSweepTx *wire.MsgTx
if row.FinalizedSweeplessSweepTx != nil {
finalizedSweepLessSweepTx = &wire.MsgTx{}
err := finalizedSweepLessSweepTx.Deserialize(bytes.NewReader(
row.FinalizedSweeplessSweepTx,
))
if err != nil {
return nil, err
}
}
var sweepTxHash *chainhash.Hash
if row.SweepTxHash != nil {
sweepTxHash, err = chainhash.NewHash(row.SweepTxHash)
if err != nil {
return nil, err
}
}
var outgoingChanSet loopdb.ChannelSet
if row.OutgoingChanSet != "" {
outgoingChanSet, err = loopdb.ConvertOutgoingChanSet(
row.OutgoingChanSet,
)
if err != nil {
return nil, err
}
}
reservationIds, err := byteSliceToReservationIds(row.ReservationIds)
if err != nil {
return nil, err
}
reservations := make([]*reservation.Reservation, 0, len(reservationIds))
for _, id := range reservationIds {
reservation, err := s.reservationStore.GetReservation(
ctx, id,
)
if err != nil {
return nil, err
}
reservations = append(reservations, reservation)
}
sweepAddress, err := btcutil.DecodeAddress(row.SweepAddress, s.network)
if err != nil {
return nil, err
}
instantOut := &InstantOut{
SwapHash: swapHash,
swapPreimage: swapPreImage,
CltvExpiry: row.CltvExpiry,
outgoingChanSet: outgoingChanSet,
Reservations: reservations,
protocolVersion: ProtocolVersion(row.ProtocolVersion),
initiationHeight: row.InitiationHeight,
Value: btcutil.Amount(row.AmountRequested),
keyLocator: keychain.KeyLocator{
Family: keychain.KeyFamily(row.ClientKeyFamily),
Index: uint32(row.ClientKeyIndex),
},
clientPubkey: clientKey,
serverPubkey: serverKey,
swapInvoice: row.SwapInvoice,
htlcFeeRate: chainfee.SatPerKWeight(row.HtlcFeeRate),
sweepAddress: sweepAddress,
finalizedHtlcTx: finalizedHtlcTx,
SweepTxHash: sweepTxHash,
FinalizedSweeplessSweepTx: finalizedSweepLessSweepTx,
sweepConfirmationHeight: uint32(deserializeNullInt32(
row.SweepConfirmationHeight,
)),
}
if len(updates) > 0 {
lastUpdate := updates[len(updates)-1]
instantOut.State = fsm.StateType(lastUpdate.UpdateState)
}
return instantOut, nil
}
// reservationIdsToByteSlice converts a slice of reservation ids to a byte
// slice.
func reservationIdsToByteSlice(reservations []*reservation.Reservation) []byte {
var reservationIds []byte
for _, reservation := range reservations {
reservationIds = append(reservationIds, reservation.ID[:]...)
}
return reservationIds
}
// byteSliceToReservationIds converts a byte slice to a slice of reservation
// ids.
func byteSliceToReservationIds(byteSlice []byte) ([]reservation.ID, error) {
if len(byteSlice)%32 != 0 {
return nil, fmt.Errorf("invalid byte slice length")
}
var reservationIds []reservation.ID
for i := 0; i < len(byteSlice); i += 32 {
var id reservation.ID
copy(id[:], byteSlice[i:i+32])
reservationIds = append(reservationIds, id)
}
return reservationIds, nil
}
// serializeNullInt32 serializes an int32 to a sql.NullInt32.
func serializeNullInt32(i int32) sql.NullInt32 {
return sql.NullInt32{
Int32: i,
Valid: true,
}
}
// deserializeNullInt32 deserializes an int32 from a sql.NullInt32.
func deserializeNullInt32(i sql.NullInt32) int32 {
if i.Valid {
return i.Int32
}
return 0
}