[BCI-3573] - Remove dependence on FinalityDepth in EVM TXM code

.changeset/chatty-spiders-double.md

@@ -0,0 +1,5 @@
+---
+"chainlink": minor
+---
+
+remove dependency on FinalityDepth in EVM TXM code. #internal

common/txmgr/confirmer.go

@@ -102,6 +102,10 @@ var (
 	}, []string{"chainID"})
 )
 
+type confirmerHeadTracker[HEAD types.Head[BLOCK_HASH], BLOCK_HASH types.Hashable] interface {
+	LatestAndFinalizedBlock(ctx context.Context) (latest, finalized HEAD, err error)
+}
+
 // Confirmer is a broad service which performs four different tasks in sequence on every new longest chain
 // Step 1: Mark that all currently pending transaction attempts were broadcast before this block
 // Step 2: Check pending transactions for receipts
@@ -133,14 +137,15 @@ type Confirmer[
 	ks               txmgrtypes.KeyStore[ADDR, CHAIN_ID, SEQ]
 	enabledAddresses []ADDR
 
-	mb        *mailbox.Mailbox[HEAD]
-	stopCh    services.StopChan
-	wg        sync.WaitGroup
-	initSync  sync.Mutex
-	isStarted bool
-
+	mb                              *mailbox.Mailbox[HEAD]
+	stopCh                          services.StopChan
+	wg                              sync.WaitGroup
+	initSync                        sync.Mutex
+	isStarted                       bool
 	nConsecutiveBlocksChainTooShort int
 	isReceiptNil                    func(R) bool
+
+	headTracker confirmerHeadTracker[HEAD, BLOCK_HASH]
 }
 
 func NewConfirmer[
@@ -164,6 +169,7 @@ func NewConfirmer[
 	lggr logger.Logger,
 	isReceiptNil func(R) bool,
 	stuckTxDetector txmgrtypes.StuckTxDetector[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE],
+	headTracker confirmerHeadTracker[HEAD, BLOCK_HASH],
 ) *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE] {
 	lggr = logger.Named(lggr, "Confirmer")
 	return &Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]{
@@ -181,6 +187,7 @@ func NewConfirmer[
 		mb:               mailbox.NewSingle[HEAD](),
 		isReceiptNil:     isReceiptNil,
 		stuckTxDetector:  stuckTxDetector,
+		headTracker:      headTracker,
 	}
 }
 
@@ -297,7 +304,20 @@ func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) pro
 		return fmt.Errorf("CheckConfirmedMissingReceipt failed: %w", err)
 	}
 
-	if err := ec.CheckForReceipts(ctx, head.BlockNumber()); err != nil {
+	_, latestFinalizedHead, err := ec.headTracker.LatestAndFinalizedBlock(ctx)
+	if err != nil {
+		return fmt.Errorf("failed to retrieve latest finalized head: %w", err)
+	}
+
+	if !latestFinalizedHead.IsValid() {
+		return fmt.Errorf("latest finalized head is not valid")
+	}
+
+	if latestFinalizedHead.BlockNumber() > head.BlockNumber() {
+		ec.lggr.Debugw("processHead received old block", "latestFinalizedHead", latestFinalizedHead.BlockNumber(), "headNum", head.BlockNumber(), "time", time.Since(mark), "id", "confirmer")
+	}
+
+	if err := ec.CheckForReceipts(ctx, head.BlockNumber(), latestFinalizedHead.BlockNumber()); err != nil {
 		return fmt.Errorf("CheckForReceipts failed: %w", err)
 	}
 
@@ -318,7 +338,7 @@ func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) pro
 	ec.lggr.Debugw("Finished RebroadcastWhereNecessary", "headNum", head.BlockNumber(), "time", time.Since(mark), "id", "confirmer")
 	mark = time.Now()
 
-	if err := ec.EnsureConfirmedTransactionsInLongestChain(ctx, head); err != nil {
+	if err := ec.EnsureConfirmedTransactionsInLongestChain(ctx, head, latestFinalizedHead.BlockNumber()); err != nil {
 		return fmt.Errorf("EnsureConfirmedTransactionsInLongestChain failed: %w", err)
 	}
 
@@ -395,8 +415,8 @@ func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) Che
 	return
 }
 
-// CheckForReceipts finds attempts that are still pending and checks to see if a receipt is present for the given block number
-func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) CheckForReceipts(ctx context.Context, blockNum int64) error {
+// CheckForReceipts finds attempts that are still pending and checks to see if a receipt is present for the given block number.
+func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) CheckForReceipts(ctx context.Context, blockNum int64, latestFinalizedBlockNum int64) error {
 	attempts, err := ec.txStore.FindTxAttemptsRequiringReceiptFetch(ctx, ec.chainID)
 	if err != nil {
 		return fmt.Errorf("FindTxAttemptsRequiringReceiptFetch failed: %w", err)
@@ -443,7 +463,7 @@ func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) Che
 		return fmt.Errorf("unable to mark txes as 'confirmed_missing_receipt': %w", err)
 	}
 
-	if err := ec.txStore.MarkOldTxesMissingReceiptAsErrored(ctx, blockNum, ec.chainConfig.FinalityDepth(), ec.chainID); err != nil {
+	if err := ec.txStore.MarkOldTxesMissingReceiptAsErrored(ctx, blockNum, latestFinalizedBlockNum, ec.chainID); err != nil {
 		return fmt.Errorf("unable to confirm buried unconfirmed txes': %w", err)
 	}
 	return nil
@@ -1004,22 +1024,30 @@ func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) han
 	}
 }
 
-// EnsureConfirmedTransactionsInLongestChain finds all confirmed txes up to the depth
+// EnsureConfirmedTransactionsInLongestChain finds all confirmed txes up to the earliest head
 // of the given chain and ensures that every one has a receipt with a block hash that is
 // in the given chain.
 //
 // If any of the confirmed transactions does not have a receipt in the chain, it has been
 // re-org'd out and will be rebroadcast.
-func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) EnsureConfirmedTransactionsInLongestChain(ctx context.Context, head types.Head[BLOCK_HASH]) error {
-	if head.ChainLength() < ec.chainConfig.FinalityDepth() {
-		logArgs := []interface{}{
-			"chainLength", head.ChainLength(), "finalityDepth", ec.chainConfig.FinalityDepth(),
-		}
+func (ec *Confirmer[CHAIN_ID, HEAD, ADDR, TX_HASH, BLOCK_HASH, R, SEQ, FEE]) EnsureConfirmedTransactionsInLongestChain(ctx context.Context, head types.Head[BLOCK_HASH], latestFinalizedHeadNumber int64) error {
+	logArgs := []interface{}{
+		"chainLength", head.ChainLength(), "latestFinalizedHead number", latestFinalizedHeadNumber,
+	}
+
+	if head.BlockNumber() < latestFinalizedHeadNumber {
+		errMsg := "current head is shorter than latest finalized head"
+		ec.lggr.Errorw(errMsg, append(logArgs, "head block number", head.BlockNumber())...)
+		return errors.New(errMsg)
+	}
+
+	calculatedFinalityDepth := uint32(head.BlockNumber() - latestFinalizedHeadNumber)
+	if head.ChainLength() < calculatedFinalityDepth {
 		if ec.nConsecutiveBlocksChainTooShort > logAfterNConsecutiveBlocksChainTooShort {
-			warnMsg := "Chain length supplied for re-org detection was shorter than FinalityDepth. Re-org protection is not working properly. This could indicate a problem with the remote RPC endpoint, a compatibility issue with a particular blockchain, a bug with this particular blockchain, heads table being truncated too early, remote node out of sync, or something else. If this happens a lot please raise a bug with the Chainlink team including a log output sample and details of the chain and RPC endpoint you are using."
+			warnMsg := "Chain length supplied for re-org detection was shorter than the depth from the latest head to the finalized head. Re-org protection is not working properly. This could indicate a problem with the remote RPC endpoint, a compatibility issue with a particular blockchain, a bug with this particular blockchain, heads table being truncated too early, remote node out of sync, or something else. If this happens a lot please raise a bug with the Chainlink team including a log output sample and details of the chain and RPC endpoint you are using."
 			ec.lggr.Warnw(warnMsg, append(logArgs, "nConsecutiveBlocksChainTooShort", ec.nConsecutiveBlocksChainTooShort)...)
 		} else {
-			logMsg := "Chain length supplied for re-org detection was shorter than FinalityDepth"
+			logMsg := "Chain length supplied for re-org detection was shorter than the depth from the latest head to the finalized head"
 			ec.lggr.Debugw(logMsg, append(logArgs, "nConsecutiveBlocksChainTooShort", ec.nConsecutiveBlocksChainTooShort)...)
 		}
 		ec.nConsecutiveBlocksChainTooShort++

common/txmgr/types/tx_store.go

@@ -89,7 +89,7 @@ type TransactionStore[
 	HasInProgressTransaction(ctx context.Context, account ADDR, chainID CHAIN_ID) (exists bool, err error)
 	LoadTxAttempts(ctx context.Context, etx *Tx[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE]) error
 	MarkAllConfirmedMissingReceipt(ctx context.Context, chainID CHAIN_ID) (err error)
-	MarkOldTxesMissingReceiptAsErrored(ctx context.Context, blockNum int64, finalityDepth uint32, chainID CHAIN_ID) error
+	MarkOldTxesMissingReceiptAsErrored(ctx context.Context, blockNum int64, latestFinalizedBlockNum int64, chainID CHAIN_ID) error
 	PreloadTxes(ctx context.Context, attempts []TxAttempt[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE]) error
 	SaveConfirmedMissingReceiptAttempt(ctx context.Context, timeout time.Duration, attempt *TxAttempt[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE], broadcastAt time.Time) error
 	SaveInProgressAttempt(ctx context.Context, attempt *TxAttempt[CHAIN_ID, ADDR, TX_HASH, BLOCK_HASH, SEQ, FEE]) error

core/chains/evm/txmgr/builder.go

@@ -1,6 +1,7 @@
 package txmgr
 
 import (
+	"context"
 	"math/big"
 	"time"
 
@@ -13,12 +14,15 @@ import (
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/config/chaintype"
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/forwarders"
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/gas"
-	httypes "github.com/smartcontractkit/chainlink/v2/core/chains/evm/headtracker/types"
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/keystore"
 	"github.com/smartcontractkit/chainlink/v2/core/chains/evm/logpoller"
 	evmtypes "github.com/smartcontractkit/chainlink/v2/core/chains/evm/types"
 )
 
+type latestAndFinalizedBlockHeadTracker interface {
+	LatestAndFinalizedBlock(ctx context.Context) (latest, finalized *evmtypes.Head, err error)
+}
+
 // NewTxm constructs the necessary dependencies for the EvmTxm (broadcaster, confirmer, etc) and returns a new EvmTxManager
 func NewTxm(
 	ds sqlutil.DataSource,
@@ -33,7 +37,7 @@ func NewTxm(
 	logPoller logpoller.LogPoller,
 	keyStore keystore.Eth,
 	estimator gas.EvmFeeEstimator,
-	headTracker httypes.HeadTracker,
+	headTracker latestAndFinalizedBlockHeadTracker,
 ) (txm TxManager,
 	err error,
 ) {
@@ -55,7 +59,7 @@ func NewTxm(
 	evmBroadcaster := NewEvmBroadcaster(txStore, txmClient, txmCfg, feeCfg, txConfig, listenerConfig, keyStore, txAttemptBuilder, lggr, checker, chainConfig.NonceAutoSync(), chainConfig.ChainType())
 	evmTracker := NewEvmTracker(txStore, keyStore, chainID, lggr)
 	stuckTxDetector := NewStuckTxDetector(lggr, client.ConfiguredChainID(), chainConfig.ChainType(), fCfg.PriceMax(), txConfig.AutoPurge(), estimator, txStore, client)
-	evmConfirmer := NewEvmConfirmer(txStore, txmClient, txmCfg, feeCfg, txConfig, dbConfig, keyStore, txAttemptBuilder, lggr, stuckTxDetector)
+	evmConfirmer := NewEvmConfirmer(txStore, txmClient, txmCfg, feeCfg, txConfig, dbConfig, keyStore, txAttemptBuilder, lggr, stuckTxDetector, headTracker)
 	evmFinalizer := NewEvmFinalizer(lggr, client.ConfiguredChainID(), chainConfig.RPCDefaultBatchSize(), txStore, client, headTracker)
 	var evmResender *Resender
 	if txConfig.ResendAfterThreshold() > 0 {
@@ -116,8 +120,9 @@ func NewEvmConfirmer(
 	txAttemptBuilder TxAttemptBuilder,
 	lggr logger.Logger,
 	stuckTxDetector StuckTxDetector,
+	headTracker latestAndFinalizedBlockHeadTracker,
 ) *Confirmer {
-	return txmgr.NewConfirmer(txStore, client, chainConfig, feeConfig, txConfig, dbConfig, keystore, txAttemptBuilder, lggr, func(r *evmtypes.Receipt) bool { return r == nil }, stuckTxDetector)
+	return txmgr.NewConfirmer(txStore, client, chainConfig, feeConfig, txConfig, dbConfig, keystore, txAttemptBuilder, lggr, func(r *evmtypes.Receipt) bool { return r == nil }, stuckTxDetector, headTracker)
 }
 
 // NewEvmTracker instantiates a new EVM tracker for abandoned transactions