staticaddr: store historic withdrawal info

Author: hieblmi

staticaddr/withdraw/interface.go

@@ -11,6 +11,18 @@ import (
 	"github.com/lightningnetwork/lnd/lnwallet"
 )
 
+// Store is the database interface that is used to store and retrieve
+// static address withdrawals.
+type Store interface {
+	// CreateWithdrawal inserts a withdrawal into the store.
+	CreateWithdrawal(ctx context.Context, tx *wire.MsgTx,
+		confirmationHeight uint32, deposits []*deposit.Deposit,
+		changePkScript []byte) error
+
+	// GetAllWithdrawals retrieves all withdrawals.
+	GetAllWithdrawals(ctx context.Context) ([]Withdrawal, error)
+}
+
 // AddressManager handles fetching of address parameters.
 type AddressManager interface {
 	// GetStaticAddressParameters returns the static address parameters.

staticaddr/withdraw/manager.go

@@ -82,6 +82,10 @@ type ManagerConfig struct {
 
 	// Signer is the signer client that is used to sign transactions.
 	Signer lndclient.SignerClient
+
+	// Store is the store that is used to persist the finalized withdrawal
+	// transactions.
+	Store *SqlStore
 }
 
 // newWithdrawalRequest is used to send withdrawal request to the manager main
@@ -401,6 +405,13 @@ func (m *Manager) WithdrawDeposits(ctx context.Context,
 	// republished in case of a fee bump, it suffices if only one spent
 	// notifier is run.
 	if allDeposited {
+		// Persist info about the finalized withdrawal.
+		err = m.cfg.Store.CreateWithdrawal(ctx, deposits)
+		if err != nil {
+			log.Errorf("Error persisting "+
+				"withdrawal: %v", err)
+		}
+
 		err = m.handleWithdrawal(
 			ctx, deposits, finalizedTx.TxHash(), withdrawalPkScript,
 		)
@@ -592,9 +603,7 @@ func (m *Manager) handleWithdrawal(ctx context.Context,
 	deposits []*deposit.Deposit, txHash chainhash.Hash,
 	withdrawalPkscript []byte) error {
 
-	addrParams, err := m.cfg.AddressManager.GetStaticAddressParameters(
-		ctx,
-	)
+	addrParams, err := m.cfg.AddressManager.GetStaticAddressParameters(ctx)
 	if err != nil {
 		log.Errorf("error retrieving address params %w", err)
 
@@ -609,19 +618,20 @@ func (m *Manager) handleWithdrawal(ctx context.Context,
 
 	go func() {
 		select {
-		case <-spentChan:
+		case spentTx := <-spentChan:
+			spendingHeight := uint32(spentTx.SpendingHeight)
 			// If the transaction received one confirmation, we
 			// ensure re-org safety by waiting for some more
 			// confirmations.
 			var confChan chan *chainntnfs.TxConfirmation
 			confChan, errChan, err =
 				m.cfg.ChainNotifier.RegisterConfirmationsNtfn(
-					ctx, &txHash, withdrawalPkscript,
-					MinConfs,
+					ctx, spentTx.SpenderTxHash,
+					withdrawalPkscript, MinConfs,
 					int32(m.initiationHeight.Load()),
 				)
 			select {
-			case <-confChan:
+			case tx := <-confChan:
 				err = m.cfg.DepositManager.TransitionDeposits(
 					ctx, deposits, deposit.OnWithdrawn,
 					deposit.Withdrawn,
@@ -631,12 +641,23 @@ func (m *Manager) handleWithdrawal(ctx context.Context,
 						"deposits: %v", err)
 				}
 
-				// Remove the withdrawal tx from the active withdrawals
-				// to stop republishing it on block arrivals.
+				// Remove the withdrawal tx from the active
+				// withdrawals to stop republishing it on block
+				// arrivals.
 				m.mu.Lock()
 				delete(m.finalizedWithdrawalTxns, txHash)
 				m.mu.Unlock()
 
+				// Persist info about the finalized withdrawal.
+				err = m.cfg.Store.UpdateWithdrawal(
+					ctx, deposits, tx.Tx, spendingHeight,
+					addrParams.PkScript,
+				)
+				if err != nil {
+					log.Errorf("Error persisting "+
+						"withdrawal: %v", err)
+				}
+
 			case err := <-errChan:
 				log.Errorf("Error waiting for confirmation: %v",
 					err)
@@ -1116,3 +1137,8 @@ func (m *Manager) DeliverWithdrawalRequest(ctx context.Context,
 			"for withdrawal response")
 	}
 }
+
+// GetAllWithdrawals returns all finalized withdrawals from the store.
+func (m *Manager) GetAllWithdrawals(ctx context.Context) ([]Withdrawal, error) {
+	return m.cfg.Store.GetAllWithdrawals(ctx)
+}

staticaddr/withdraw/sql_store.go

@@ -0,0 +1,221 @@
+package withdraw
+
+import (
+	"bytes"
+	"context"
+	"database/sql"
+
+	"github.com/btcsuite/btcd/btcutil"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/wire"
+	"github.com/lightninglabs/loop/loopdb"
+	"github.com/lightninglabs/loop/loopdb/sqlc"
+	"github.com/lightninglabs/loop/staticaddr/deposit"
+	"github.com/lightningnetwork/lnd/clock"
+)
+
+type Querier interface {
+	// CreateWithdrawal inserts a new withdrawal.
+	CreateWithdrawal(ctx context.Context,
+		arg sqlc.CreateWithdrawalParams) error
+
+	// UpdateWithdrawal updates a withdrawal with confirmation parameters.
+	UpdateWithdrawal(ctx context.Context,
+		arg sqlc.UpdateWithdrawalParams) error
+
+	// GetWithdrawalIDByDepositID retrieves the withdrawal ID associated
+	// with a given deposit ID.
+	GetWithdrawalIDByDepositID(ctx context.Context, depositID []byte) (
+		[]byte, error)
+
+	// CreateWithdrawalDeposit links withdrawal to deposits.
+	CreateWithdrawalDeposit(ctx context.Context,
+		arg sqlc.CreateWithdrawalDepositParams) error
+
+	// GetWithdrawalDeposits retrieves the deposit IDs associated with a
+	// withdrawal.
+	GetWithdrawalDeposits(ctx context.Context, withdrawalID []byte) (
+		[][]byte, error)
+
+	// GetAllWithdrawals retrieves all withdrawals from the database.
+	GetAllWithdrawals(ctx context.Context) ([]sqlc.Withdrawal, error)
+}
+
+// BaseDB is the interface that contains all the queries generated by sqlc for
+// the static_address_swaps table and transaction functionality.
+type BaseDB interface {
+	Querier
+
+	// ExecTx allows for executing a function in the context of a database
+	// transaction.
+	ExecTx(ctx context.Context, txOptions loopdb.TxOptions,
+		txBody func(Querier) error) error
+}
+
+// SqlStore is the backing store for static address withdrawals.
+type SqlStore struct {
+	baseDB       BaseDB
+	depositStore deposit.Store
+	clock        clock.Clock
+}
+
+// NewSqlStore constructs a new SQLStore from a BaseDB. The BaseDB is agnostic
+// to the underlying driver which can be postgres or sqlite.
+func NewSqlStore(db BaseDB, depositStore deposit.Store) *SqlStore {
+	return &SqlStore{
+		baseDB:       db,
+		depositStore: depositStore,
+		clock:        clock.NewDefaultClock(),
+	}
+}
+
+// CreateWithdrawal creates a static address withdrawal record in the database.
+func (s *SqlStore) CreateWithdrawal(ctx context.Context,
+	deposits []*deposit.Deposit) error {
+
+	id, err := GetRandomWithdrawalID()
+	if err != nil {
+		return err
+	}
+
+	var totalAmount btcutil.Amount
+	for _, deposit := range deposits {
+		totalAmount += deposit.Value
+	}
+
+	createArgs := sqlc.CreateWithdrawalParams{
+		WithdrawalID:       id[:],
+		TotalDepositAmount: int64(totalAmount),
+		InitiationTime:     s.clock.Now().UTC(),
+	}
+	return s.baseDB.ExecTx(ctx, &loopdb.SqliteTxOptions{},
+		func(q Querier) error {
+			err := q.CreateWithdrawal(ctx, createArgs)
+			if err != nil {
+				return err
+			}
+
+			for _, deposit := range deposits {
+				err = q.CreateWithdrawalDeposit(
+					ctx, sqlc.CreateWithdrawalDepositParams{
+						WithdrawalID: id[:],
+						DepositID:    deposit.ID[:],
+					})
+				if err != nil {
+					return err
+				}
+			}
+
+			return nil
+		})
+}
+
+// UpdateWithdrawal updates a withdrawal record with the transaction
+// information, including the withdrawn amount, change amount, and
+// confirmation height. It is expected that the withdrawal has already been
+// created with CreateWithdrawal, and that the deposits slice contains the
+// deposits associated with the withdrawal.
+func (s *SqlStore) UpdateWithdrawal(ctx context.Context,
+	deposits []*deposit.Deposit, tx *wire.MsgTx, confirmationHeight uint32,
+	changePkScript []byte) error {
+
+	// Populate the optional change amount.
+	withdrawnAmount, changeAmount := int64(0), int64(0)
+	if len(tx.TxOut) == 1 {
+		withdrawnAmount = tx.TxOut[0].Value
+	} else if len(tx.TxOut) == 2 {
+		withdrawnAmount, changeAmount = tx.TxOut[0].Value, tx.TxOut[1].Value
+		if bytes.Equal(changePkScript, tx.TxOut[0].PkScript) {
+			changeAmount = tx.TxOut[0].Value
+			withdrawnAmount = tx.TxOut[1].Value
+		}
+	}
+
+	updateArgs := sqlc.UpdateWithdrawalParams{
+		WithdrawalTxID: sql.NullString{
+			String: tx.TxHash().String(),
+			Valid:  true,
+		},
+		WithdrawnAmount: sql.NullInt64{
+			Int64: withdrawnAmount,
+			Valid: withdrawnAmount > 0,
+		},
+		ChangeAmount: sql.NullInt64{
+			Int64: changeAmount,
+			Valid: changeAmount > 0,
+		},
+		ConfirmationHeight: sql.NullInt64{
+			Int64: int64(confirmationHeight),
+			Valid: confirmationHeight > 0,
+		},
+	}
+
+	return s.baseDB.ExecTx(ctx, &loopdb.SqliteTxOptions{},
+		func(q Querier) error {
+			withdrawalID, err := q.GetWithdrawalIDByDepositID(
+				ctx, deposits[0].ID[:],
+			)
+			if err != nil {
+				return err
+			}
+
+			updateArgs.WithdrawalID = withdrawalID
+			err = q.UpdateWithdrawal(ctx, updateArgs)
+			if err != nil {
+				return err
+			}
+
+			return nil
+		})
+}
+
+// GetAllWithdrawals retrieves all static address withdrawals from the
+// database. It returns a slice of Withdrawal structs, each containing a list
+// of associated deposits.
+func (s *SqlStore) GetAllWithdrawals(ctx context.Context) ([]Withdrawal,
+	error) {
+
+	withdrawals, err := s.baseDB.GetAllWithdrawals(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	result := make([]Withdrawal, 0, len(withdrawals))
+	for _, w := range withdrawals {
+		depositIDs, err := s.baseDB.GetWithdrawalDeposits(ctx,
+			w.WithdrawalID)
+
+		if err != nil {
+			return nil, err
+		}
+
+		deposits := make([]*deposit.Deposit, 0, len(depositIDs))
+		for _, dID := range depositIDs {
+			deposit, err := s.depositStore.GetDeposit(
+				ctx, deposit.ID(dID),
+			)
+			if err != nil {
+				return nil, err
+			}
+			deposits = append(deposits, deposit)
+		}
+
+		txID, err := chainhash.NewHashFromStr(w.WithdrawalTxID.String)
+		if err != nil {
+			return nil, err
+		}
+
+		result = append(result, Withdrawal{
+			ID:                 ID(w.WithdrawalID),
+			TxID:               *txID,
+			Deposits:           deposits,
+			TotalDepositAmount: btcutil.Amount(w.TotalDepositAmount),
+			WithdrawnAmount:    btcutil.Amount(w.WithdrawnAmount.Int64),
+			ChangeAmount:       btcutil.Amount(w.ChangeAmount.Int64),
+			InitiationTime:     w.InitiationTime,
+			ConfirmationHeight: w.ConfirmationHeight.Int64,
+		})
+	}
+
+	return result, nil
+}