Merge pull request #44 from babylonchain/critical-errors-handling

Handle error of not getting covenant quorum

Author: KonradStaniec

internal/db/dbclient.go

@@ -97,6 +97,10 @@ func (db *Database) FindFailedUnbodningDocuments(ctx context.Context) ([]model.U
 	return db.findUnbondingDocumentsWithState(ctx, model.Failed)
 }
 
+func (db *Database) FindUnbondingDocumentsWithNoCovenantQuorum(ctx context.Context) ([]model.UnbondingDocument, error) {
+	return db.findUnbondingDocumentsWithState(ctx, model.FailedToGetCovenantSignatures)
+}
+
 func (db *Database) FindSendUnbondingDocuments(ctx context.Context) ([]model.UnbondingDocument, error) {
 	return db.findUnbondingDocumentsWithState(ctx, model.Send)
 }
@@ -129,3 +133,9 @@ func (db *Database) SetUnbondingDocumentInputAlreadySpent(
 	unbondingTxHashHex string) error {
 	return db.updateUnbondingDocumentState(ctx, unbondingTxHashHex, model.InputAlreadySpent)
 }
+
+func (db *Database) SetUnbondingDocumentFailedToGetCovenantSignatures(
+	ctx context.Context,
+	unbondingTxHashHex string) error {
+	return db.updateUnbondingDocumentState(ctx, unbondingTxHashHex, model.FailedToGetCovenantSignatures)
+}

internal/db/model/unbonding.go

@@ -9,13 +9,11 @@ const (
 type UnbondingState string
 
 const (
-	Inserted UnbondingState = "INSERTED"
-	Send     UnbondingState = "SEND"
-	// TODO: This is not used now, but it will be necessary to cover the case when
-	// we try to send unbonding transaction but someone already withdrew the staking
-	// output
-	InputAlreadySpent UnbondingState = "INPUT_ALREADY_SPENT"
-	Failed            UnbondingState = "FAILED"
+	Inserted                      UnbondingState = "INSERTED"
+	Send                          UnbondingState = "SEND"
+	InputAlreadySpent             UnbondingState = "INPUT_ALREADY_SPENT"
+	Failed                        UnbondingState = "FAILED"
+	FailedToGetCovenantSignatures UnbondingState = "FAILED_TO_GET_COVENANT_SIGNATURES"
 )
 
 type UnbondingDocument struct {

internal/services/expected_interfaces.go

@@ -125,9 +125,13 @@ type UnbondingStore interface {
 
 	GetFailedUnbondingTransactions(ctx context.Context) ([]*UnbondingTxData, error)
 
+	GetUnbondingTransactionsWithNoQuorum(ctx context.Context) ([]*UnbondingTxData, error)
+
 	SetUnbondingTransactionProcessed(ctx context.Context, utx *UnbondingTxData) error
 
 	SetUnbondingTransactionProcessingFailed(ctx context.Context, utx *UnbondingTxData) error
 
 	SetUnbondingTransactionInputAlreadySpent(ctx context.Context, utx *UnbondingTxData) error
+
+	SetUnbondingTransactionFailedToGetCovenantSignatures(ctx context.Context, utx *UnbondingTxData) error
 }

internal/services/in_mem_store.go

@@ -14,10 +14,11 @@ import (
 type state string
 
 const (
-	inserted          state = "inserted"
-	send              state = "send"
-	inputAlreadySpent state = "input_already_spent"
-	failed            state = "failed"
+	inserted             state = "inserted"
+	send                 state = "send"
+	inputAlreadySpent    state = "input_already_spent"
+	failed               state = "failed"
+	failedToGetSignatues state = "failed_to_get_covenant_signatures"
 )
 
 type unbondingTxDataWithCounter struct {
@@ -136,6 +137,35 @@ func (s *InMemoryUnbondingStore) GetFailedUnbondingTransactions(ctx context.Cont
 	return resUnbondingTxData, nil
 }
 
+func (s *InMemoryUnbondingStore) GetUnbondingTransactionsWithNoQuorum(ctx context.Context) ([]*UnbondingTxData, error) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	var res []*unbondingTxDataWithCounter
+
+	for _, tx := range s.mapping {
+		txCopy := tx
+		// get only failed transactions
+		if tx.state == failedToGetSignatues {
+			res = append(res, txCopy)
+		}
+	}
+
+	// sort by counter
+	sort.SliceStable(res, func(i, j int) bool {
+		return res[i].Counter < res[j].Counter
+	})
+
+	// convert to UnbondingTxData
+	var resUnbondingTxData []*UnbondingTxData
+	for _, tx := range res {
+		txCopy := tx
+		resUnbondingTxData = append(resUnbondingTxData, &txCopy.UnbondingTxData)
+	}
+
+	return resUnbondingTxData, nil
+}
+
 func (s *InMemoryUnbondingStore) SetUnbondingTransactionProcessed(_ context.Context, utx *UnbondingTxData) error {
 	s.mu.Lock()
 	defer s.mu.Unlock()
@@ -180,3 +210,18 @@ func (s *InMemoryUnbondingStore) SetUnbondingTransactionInputAlreadySpent(_ cont
 
 	return nil
 }
+
+func (s *InMemoryUnbondingStore) SetUnbondingTransactionFailedToGetCovenantSignatures(_ context.Context, utx *UnbondingTxData) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	tx, exists := s.mapping[*utx.UnbondingTransactionHash]
+
+	if !exists {
+		return fmt.Errorf("tx with hash %s does not exist", *utx.UnbondingTransactionHash)
+	}
+
+	tx.state = failedToGetSignatues
+
+	return nil
+}

internal/services/persistent_store.go

@@ -226,6 +226,13 @@ func (s *PersistentUnbondingStorage) GetFailedUnbondingTransactions(ctx context.
 	)
 }
 
+func (s *PersistentUnbondingStorage) GetUnbondingTransactionsWithNoQuorum(ctx context.Context) ([]*UnbondingTxData, error) {
+	return transformDocuments(
+		ctx,
+		s.client.FindUnbondingDocumentsWithNoCovenantQuorum,
+	)
+}
+
 func (s *PersistentUnbondingStorage) GetNotProcessedUnbondingTransactions(ctx context.Context) ([]*UnbondingTxData, error) {
 	return transformDocuments(
 		ctx,
@@ -247,3 +254,8 @@ func (s *PersistentUnbondingStorage) SetUnbondingTransactionInputAlreadySpent(ct
 	txHash := utx.UnbondingTransactionHash.String()
 	return s.client.SetUnbondingDocumentFailed(ctx, txHash)
 }
+
+func (s *PersistentUnbondingStorage) SetUnbondingTransactionFailedToGetCovenantSignatures(ctx context.Context, utx *UnbondingTxData) error {
+	txHash := utx.UnbondingTransactionHash.String()
+	return s.client.SetUnbondingDocumentFailedToGetCovenantSignatures(ctx, txHash)
+}

internal/services/unbonding_pipeline.go

@@ -7,12 +7,14 @@ import (
 	"fmt"
 	"log/slog"
 
+	"github.com/babylonchain/babylon/types"
 	"github.com/babylonchain/cli-tools/internal/btcclient"
 	"github.com/babylonchain/cli-tools/internal/config"
 	"github.com/babylonchain/cli-tools/internal/db"
 	"github.com/btcsuite/btcd/btcec/v2"
 	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/chaincfg"
+	"github.com/btcsuite/btcd/chaincfg/chainhash"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/prometheus/client_golang/prometheus/push"
 )
@@ -22,11 +24,26 @@ var (
 	// code, or we allowed some invalid data into database.
 	// When this happend we stop processing pipeline and return immediately, without
 	// changing status of any unbonding transaction.
-	ErrCriticalError = fmt.Errorf("critical error encountered")
+	ErrCriticalError = fmt.Errorf("critical error")
 )
 
-func wrapCrititical(err error) error {
-	return fmt.Errorf("%s:%w", err.Error(), ErrCriticalError)
+func mustBtcTxToHex(tx *wire.MsgTx) string {
+	bytes, err := types.SerializeBTCTx(tx)
+	if err != nil {
+		panic(err)
+	}
+	return hex.EncodeToString(bytes)
+}
+
+func wrapCrititical(
+	stakingTx *wire.MsgTx,
+	stakingTxHash *chainhash.Hash,
+	err error,
+) error {
+	stakingTxHex := mustBtcTxToHex(stakingTx)
+	return fmt.Errorf(
+		"err: %s, staking_tx_haxh:%s, staking_tx:%s: %w", err.Error(), stakingTxHash.String(), stakingTxHex, ErrCriticalError,
+	)
 }
 
 func pubKeyToStringSchnorr(pubKey *btcec.PublicKey) string {
@@ -247,6 +264,7 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		utx := tx
 
 		stakingOutputFromDb := utx.StakingOutput()
+
 		stakingTxHash := utx.UnbondingTransaction.TxIn[0].PreviousOutPoint.Hash
 
 		stakingTxInfo, err := up.sender.TxByHash(
@@ -257,14 +275,22 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		// if the staking transaction is not found in btc chain, it means something is wrong
 		// as staking service should not allow to create unbonding transaction without staking transaction
 		if err != nil {
-			return wrapCrititical(err)
+			return wrapCrititical(
+				utx.StakingTransactionData.StakingTransaction,
+				&stakingTxHash,
+				err,
+			)
 		}
 
 		params, err := up.retriever.ParamsByHeight(ctx, uint64(stakingTxInfo.TxInclusionHeight))
 
 		// we should always be able to retrieve params for the height of the staking transaction
 		if err != nil {
-			return wrapCrititical(err)
+			return wrapCrititical(
+				utx.StakingTransactionData.StakingTransaction,
+				&stakingTxHash,
+				err,
+			)
 		}
 
 		stakingOutputRecovered, unbondingPathSpendInfo, err := CreateUnbondingPathSpendInfo(
@@ -274,7 +300,11 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		)
 
 		if err != nil {
-			return wrapCrititical(err)
+			return wrapCrititical(
+				utx.StakingTransactionData.StakingTransaction,
+				&stakingTxHash,
+				err,
+			)
 		}
 
 		// This the last line check before sending unbonding transaction for signing. It checks
@@ -285,7 +315,11 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		// - pipeline is run on bad BTC network
 		// - stakingApi service has a bug
 		if !outputsAreEqual(stakingOutputRecovered, stakingOutputFromDb) {
-			return wrapCrititical(fmt.Errorf("staking output from staking tx and staking output re-build from params are different"))
+			return wrapCrititical(
+				utx.StakingTransactionData.StakingTransaction,
+				&stakingTxHash,
+				fmt.Errorf("staking output from staking tx and staking output re-build from params are different"),
+			)
 		}
 
 		sigs, err := up.signUnbondingTransaction(
@@ -297,7 +331,26 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		)
 
 		if err != nil {
-			return wrapCrititical(err)
+			up.Metrics.RecordFailedCovenantQuorum()
+
+			unbondingTxHex := mustBtcTxToHex(utx.UnbondingTransaction)
+
+			up.logger.Error("Failed to get quorum of covenant signatures to unbond",
+				"staking_tx_hash", tx.StakingTransactionData.StakingTransaction.TxHash().String(),
+				"unbonding_tx_hash", tx.UnbondingTransactionHash.String(),
+				"unbonding_tx", unbondingTxHex,
+			)
+
+			// Note that we failed to get signatures from covenant members
+			if err := up.store.SetUnbondingTransactionFailedToGetCovenantSignatures(ctx, utx); err != nil {
+				return wrapCrititical(
+					utx.StakingTransactionData.StakingTransaction,
+					&stakingTxHash,
+					err,
+				)
+			}
+
+			continue
 		}
 
 		up.logger.Info("Successfully collected quorum of covenant signatures to unbond",
@@ -315,7 +368,11 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		)
 
 		if err != nil {
-			return wrapCrititical(err)
+			return wrapCrititical(
+				utx.StakingTransactionData.StakingTransaction,
+				&stakingTxHash,
+				err,
+			)
 		}
 
 		// We assume that this is valid unbodning transaction, with 1 input
@@ -331,7 +388,11 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 			up.logger.Info("The input of the unbonding transaction has already been spent",
 				slog.String("staking_tx_hash", stakingTxHash.String()))
 			if err := up.store.SetUnbondingTransactionInputAlreadySpent(ctx, utx); err != nil {
-				return wrapCrititical(err)
+				return wrapCrititical(
+					utx.StakingTransactionData.StakingTransaction,
+					&stakingTxHash,
+					err,
+				)
 			}
 			continue
 		}
@@ -341,7 +402,11 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 		if err != nil {
 			up.logger.Error("Failed to send unbonding transaction", "error", err)
 			if err := up.store.SetUnbondingTransactionProcessingFailed(ctx, utx); err != nil {
-				return wrapCrititical(err)
+				return wrapCrititical(
+					utx.StakingTransactionData.StakingTransaction,
+					&stakingTxHash,
+					err,
+				)
 			}
 			up.Metrics.RecordFailedUnbodingTransaction()
 		} else {
@@ -350,7 +415,11 @@ func (up *UnbondingPipeline) processUnbondingTransactions(
 				slog.String("tx_hash", hash.String()),
 			)
 			if err := up.store.SetUnbondingTransactionProcessed(ctx, utx); err != nil {
-				return wrapCrititical(err)
+				return wrapCrititical(
+					utx.StakingTransactionData.StakingTransaction,
+					&stakingTxHash,
+					err,
+				)
 			}
 			up.Metrics.RecordSentUnbondingTransaction()
 		}
@@ -398,12 +467,6 @@ func (up *UnbondingPipeline) ProcessNewTransactions(ctx context.Context) error {
 func (up *UnbondingPipeline) ProcessFailedTransactions(ctx context.Context) error {
 	up.logger.Info("Running unbonding pipeline for failed transactions")
 
-	unbondingTransactions, err := up.store.GetFailedUnbondingTransactions(ctx)
-
-	if err != nil {
-		return err
-	}
-
 	defer func() {
 		if up.Metrics.Config.Enabled {
 			if err := up.pushMetrics(); err != nil {
@@ -412,9 +475,22 @@ func (up *UnbondingPipeline) ProcessFailedTransactions(ctx context.Context) erro
 		}
 	}()
 
-	if len(unbondingTransactions) == 0 {
-		up.logger.Info("No failed unbonding transactions to process")
-		return nil
+	// 1. First process transactions that failed to get quorum of covenant signatures
+	unbondingTxWithNoQuorum, err := up.store.GetUnbondingTransactionsWithNoQuorum(ctx)
+
+	if err != nil {
+		return err
+	}
+
+	if err := up.processUnbondingTransactions(ctx, unbondingTxWithNoQuorum); err != nil {
+		return err
+	}
+
+	// 2. Second process other failed unbonding transactions
+	unbondingTransactions, err := up.store.GetFailedUnbondingTransactions(ctx)
+
+	if err != nil {
+		return err
 	}
 
 	if err := up.processUnbondingTransactions(ctx, unbondingTransactions); err != nil {

internal/services/unbonding_pipeline_metrics.go

@@ -10,6 +10,7 @@ type PipelineMetrics struct {
 	FailedSigningReqs          *prometheus.CounterVec
 	SuccessfulSentTransactions prometheus.Counter
 	FailureSentTransactions    prometheus.Counter
+	FailureToGetCovenantQuorum prometheus.Counter
 	Config                     *config.MetricsConfig
 }
 
@@ -41,6 +42,12 @@ func NewPipelineMetrics(cfg *config.MetricsConfig) *PipelineMetrics {
 				Help: "How many transactions failed to be sent to the network",
 			},
 		),
+		FailureToGetCovenantQuorum: prometheus.NewCounter(
+			prometheus.CounterOpts{
+				Name: "number_of_failed_covenant_quorums",
+				Help: "How many times we failed to get covenant quorum for signing request",
+			},
+		),
 		Config: cfg,
 	}
 }
@@ -60,3 +67,7 @@ func (pm *PipelineMetrics) RecordSentUnbondingTransaction() {
 func (pm *PipelineMetrics) RecordFailedUnbodingTransaction() {
 	pm.FailureSentTransactions.Inc()
 }
+
+func (pm *PipelineMetrics) RecordFailedCovenantQuorum() {
+	pm.FailureToGetCovenantQuorum.Inc()
+}