diff --git a/packages/relayer/api/api.go b/packages/relayer/api/api.go
index e7b72bd1477..ab7b3c1b0e8 100644
--- a/packages/relayer/api/api.go
+++ b/packages/relayer/api/api.go
@@ -29,7 +29,7 @@ type API struct {
 	srv          *http.Server
 	httpPort     uint64
 	ctx          context.Context
-	wg           *sync.WaitGroup
+	wg           sync.WaitGroup
 	srcEthClient *ethclient.Client
 }
 
@@ -84,7 +84,6 @@ func InitFromConfig(ctx context.Context, api *API, cfg *Config) (err error) {
 	api.srv = srv
 	api.httpPort = cfg.HTTPPort
 	api.ctx = ctx
-	api.wg = &sync.WaitGroup{}
 	api.srcEthClient = srcEthClient
 
 	return nil
@@ -112,7 +111,7 @@ func (api *API) Start() error {
 
 	go func() {
 		if err := backoff.Retry(func() error {
-			return utils.ScanBlocks(api.ctx, api.srcEthClient, api.wg)
+			return utils.ScanBlocks(api.ctx, api.srcEthClient, &api.wg)
 		}, backoff.NewConstantBackOff(5*time.Second)); err != nil {
 			slog.Error("scan blocks backoff retry", "error", err)
 		}
diff --git a/packages/relayer/bridge/bridge.go b/packages/relayer/bridge/bridge.go
index bcfc22e603d..7c60ace3337 100644
--- a/packages/relayer/bridge/bridge.go
+++ b/packages/relayer/bridge/bridge.go
@@ -45,15 +45,13 @@ type Bridge struct {
 	srcBridge  relayer.Bridge
 	destBridge relayer.Bridge
 
-	mu *sync.Mutex
-
 	addr common.Address
 
 	backOffRetryInterval time.Duration
 	backOffMaxRetries    uint64
 	ethClientTimeout     time.Duration
 
-	wg *sync.WaitGroup
+	wg sync.WaitGroup
 
 	srcChainId  *big.Int
 	destChainId *big.Int
@@ -121,9 +119,6 @@ func InitFromConfig(ctx context.Context, b *Bridge, cfg *Config) error {
 	b.srcChainId = srcChainID
 	b.destChainId = destChainID
 
-	b.wg = &sync.WaitGroup{}
-	b.mu = &sync.Mutex{}
-
 	b.backOffRetryInterval = time.Duration(cfg.BackoffRetryInterval) * time.Second
 	b.backOffMaxRetries = cfg.BackOffMaxRetrys
 	b.ethClientTimeout = time.Duration(cfg.ETHClientTimeout) * time.Second
diff --git a/packages/relayer/db.go b/packages/relayer/db.go
deleted file mode 100644
index 02798e0e236..00000000000
--- a/packages/relayer/db.go
+++ /dev/null
@@ -1,28 +0,0 @@
-package relayer
-
-import (
-	"database/sql"
-
-	"github.com/cyberhorsey/errors"
-	"gorm.io/gorm"
-)
-
-var (
-	ErrNoDB = errors.Validation.NewWithKeyAndDetail("ERR_NO_DB", "DB is required")
-)
-
-type DBConnectionOpts struct {
-	Name            string
-	Password        string
-	Host            string
-	Database        string
-	MaxIdleConns    uint64
-	MaxOpenConns    uint64
-	MaxConnLifetime uint64
-	OpenFunc        func(dsn string) (DB, error)
-}
-
-type DB interface {
-	DB() (*sql.DB, error)
-	GormDB() *gorm.DB
-}
diff --git a/packages/relayer/indexer/indexer.go b/packages/relayer/indexer/indexer.go
index dc6683351a2..410fde629ae 100644
--- a/packages/relayer/indexer/indexer.go
+++ b/packages/relayer/indexer/indexer.go
@@ -114,7 +114,7 @@ type Indexer struct {
 
 	ethClientTimeout time.Duration
 
-	wg *sync.WaitGroup
+	wg sync.WaitGroup
 
 	numLatestBlocksEndWhenCrawling   uint64
 	numLatestBlocksStartWhenCrawling uint64
@@ -123,8 +123,6 @@ type Indexer struct {
 
 	ctx context.Context
 
-	mu *sync.Mutex
-
 	eventName string
 
 	cfg *Config
@@ -230,8 +228,6 @@ func InitFromConfig(ctx context.Context, i *Indexer, cfg *Config) (err error) {
 	i.syncMode = cfg.SyncMode
 	i.watchMode = cfg.WatchMode
 
-	i.wg = &sync.WaitGroup{}
-
 	i.ethClientTimeout = time.Duration(cfg.ETHClientTimeout) * time.Second
 
 	i.numLatestBlocksEndWhenCrawling = cfg.NumLatestBlocksEndWhenCrawling
@@ -239,8 +235,6 @@ func InitFromConfig(ctx context.Context, i *Indexer, cfg *Config) (err error) {
 
 	i.targetBlockNumber = cfg.TargetBlockNumber
 
-	i.mu = &sync.Mutex{}
-
 	i.eventName = cfg.EventName
 
 	i.cfg = cfg
@@ -280,13 +274,11 @@ func (i *Indexer) Start() error {
 		return errors.Wrap(err, "i.setInitialIndexingBlockByMode")
 	}
 
-	i.wg.Add(1)
-
 	go i.eventLoop(i.ctx, i.latestIndexedBlockNumber)
 
 	go func() {
 		if err := backoff.Retry(func() error {
-			return utils.ScanBlocks(i.ctx, i.srcEthClient, i.wg)
+			return utils.ScanBlocks(i.ctx, i.srcEthClient, &i.wg)
 		}, backoff.NewConstantBackOff(5*time.Second)); err != nil {
 			slog.Error("scan blocks backoff retry", "error", err)
 		}
@@ -296,12 +288,10 @@ func (i *Indexer) Start() error {
 }
 
 func (i *Indexer) eventLoop(ctx context.Context, startBlockID uint64) {
+	i.wg.Add(1)
 	defer i.wg.Done()
 
-	var d time.Duration = 10 * time.Second
-
-	t := time.NewTicker(d)
-
+	t := time.NewTicker(10 * time.Second)
 	defer t.Stop()
 
 	for {
diff --git a/packages/relayer/indexer/indexer_test.go b/packages/relayer/indexer/indexer_test.go
index ca5a150ab36..8af5555ca1d 100644
--- a/packages/relayer/indexer/indexer_test.go
+++ b/packages/relayer/indexer/indexer_test.go
@@ -2,7 +2,6 @@ package indexer
 
 import (
 	"context"
-	"sync"
 	"time"
 
 	"github.com/taikoxyz/taiko-mono/packages/relayer"
@@ -28,15 +27,12 @@ func newTestService(syncMode SyncMode, watchMode WatchMode) (*Indexer, relayer.B
 		syncMode:  syncMode,
 		watchMode: watchMode,
 
-		wg: &sync.WaitGroup{},
-
 		ctx: context.Background(),
 
 		srcChainId:  mock.MockChainID,
 		destChainId: mock.MockChainID,
 
 		ethClientTimeout: 10 * time.Second,
-		mu:               &sync.Mutex{},
 		eventName:        relayer.EventNameMessageSent,
 	}, b
 }
diff --git a/packages/relayer/pkg/utils/scan_blocks.go b/packages/relayer/pkg/utils/scan_blocks.go
index ec62c24a724..d6da257ebc5 100644
--- a/packages/relayer/pkg/utils/scan_blocks.go
+++ b/packages/relayer/pkg/utils/scan_blocks.go
@@ -15,10 +15,7 @@ type headSubscriber interface {
 
 func ScanBlocks(ctx context.Context, ethClient headSubscriber, wg *sync.WaitGroup) error {
 	wg.Add(1)
-
-	defer func() {
-		wg.Done()
-	}()
+	defer wg.Done()
 
 	headers := make(chan *types.Header)
 
diff --git a/packages/relayer/processor/processor.go b/packages/relayer/processor/processor.go
index 43302583357..64747d32eab 100644
--- a/packages/relayer/processor/processor.go
+++ b/packages/relayer/processor/processor.go
@@ -103,8 +103,6 @@ type Processor struct {
 
 	prover *proof.Prover
 
-	mu *sync.Mutex
-
 	relayerAddr             common.Address
 	srcSignalServiceAddress common.Address
 
@@ -121,7 +119,7 @@ type Processor struct {
 
 	msgCh chan queue.Message
 
-	wg *sync.WaitGroup
+	wg sync.WaitGroup
 
 	srcChainId  *big.Int
 	destChainId *big.Int
@@ -137,7 +135,7 @@ type Processor struct {
 	maxMessageRetries uint64
 
 	processingTxHashes map[common.Hash]bool
-	processingTxHashMu *sync.Mutex
+	processingTxHashMu sync.Mutex
 }
 
 // InitFromCli creates a new processor from a cli context
@@ -363,8 +361,6 @@ func InitFromConfig(ctx context.Context, p *Processor, cfg *Config) error {
 	p.srcSignalServiceAddress = cfg.SrcSignalServiceAddress
 
 	p.msgCh = make(chan queue.Message)
-	p.wg = &sync.WaitGroup{}
-	p.mu = &sync.Mutex{}
 	p.srcCaller = srcRpcClient
 
 	p.backOffRetryInterval = time.Duration(cfg.BackoffRetryInterval) * time.Second
@@ -376,7 +372,6 @@ func InitFromConfig(ctx context.Context, p *Processor, cfg *Config) error {
 	p.maxMessageRetries = cfg.MaxMessageRetries
 
 	p.processingTxHashes = make(map[common.Hash]bool, 0)
-	p.processingTxHashMu = &sync.Mutex{}
 
 	return nil
 }
@@ -418,7 +413,7 @@ func (p *Processor) Start() error {
 	go func() {
 		if err := backoff.Retry(func() error {
 			slog.Info("attempting backoff queue subscription")
-			if err := p.queue.Subscribe(ctx, p.msgCh, p.wg); err != nil {
+			if err := p.queue.Subscribe(ctx, p.msgCh, &p.wg); err != nil {
 				slog.Error("processor queue subscription error", "err", err.Error())
 				return err
 			}
@@ -429,13 +424,11 @@ func (p *Processor) Start() error {
 		}
 	}()
 
-	p.wg.Add(1)
-
 	go p.eventLoop(ctx)
 
 	go func() {
 		if err := backoff.Retry(func() error {
-			return utils.ScanBlocks(ctx, p.srcEthClient, p.wg)
+			return utils.ScanBlocks(ctx, p.srcEthClient, &p.wg)
 		}, backoff.NewConstantBackOff(5*time.Second)); err != nil {
 			slog.Error("scan blocks backoff retry", "error", err)
 		}
@@ -451,9 +444,8 @@ func (p *Processor) queueName() string {
 // eventLoop is the main event loop of a Processor which should read
 // messages from a queue and then process them.
 func (p *Processor) eventLoop(ctx context.Context) {
-	defer func() {
-		p.wg.Done()
-	}()
+	p.wg.Add(1)
+	defer p.wg.Done()
 
 	for {
 		select {
diff --git a/packages/relayer/processor/processor_test.go b/packages/relayer/processor/processor_test.go
index 5b4582c1a39..2eb87863ea8 100644
--- a/packages/relayer/processor/processor_test.go
+++ b/packages/relayer/processor/processor_test.go
@@ -1,7 +1,6 @@
 package processor
 
 import (
-	"sync"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
@@ -28,7 +27,6 @@ func newTestProcessor(profitableOnly bool) *Processor {
 		destEthClient:             &mock.EthClient{},
 		destERC20Vault:            &mock.TokenVault{},
 		srcSignalService:          &mock.SignalService{},
-		mu:                        &sync.Mutex{},
 		ecdsaKey:                  privateKey,
 		prover:                    prover,
 		srcCaller:                 &mock.Caller{},
@@ -49,6 +47,5 @@ func newTestProcessor(profitableOnly bool) *Processor {
 		maxMessageRetries:  5,
 		destQuotaManager:   &mock.QuotaManager{},
 		processingTxHashes: make(map[common.Hash]bool, 0),
-		processingTxHashMu: &sync.Mutex{},
 	}
 }
diff --git a/packages/relayer/scripts/abigen.sh b/packages/relayer/scripts/abigen.sh
index 2a25191ffee..d6e14be717f 100755
--- a/packages/relayer/scripts/abigen.sh
+++ b/packages/relayer/scripts/abigen.sh
@@ -1,4 +1,4 @@
-#/bin/sh
+#!/bin/sh
 
 if [ ! -d "../protocol/out" ]; then
     echo "ABI not generated in protocol package yet. Please run npm install && npx hardhat compile in ../protocol"
diff --git a/packages/relayer/scripts/swagger.sh b/packages/relayer/scripts/swagger.sh
index 2ba0cac2c3a..3a45b8beaac 100755
--- a/packages/relayer/scripts/swagger.sh
+++ b/packages/relayer/scripts/swagger.sh
@@ -1,3 +1,3 @@
-#/bin/sh
+#!/bin/sh
 
-swag init -g server.go -d pkg/http --parseDependency
\ No newline at end of file
+swag init -g server.go -d pkg/http --parseDependency
diff --git a/packages/relayer/types.go b/packages/relayer/types.go
index 6867bb05775..657d22d63d9 100644
--- a/packages/relayer/types.go
+++ b/packages/relayer/types.go
@@ -22,17 +22,6 @@ var (
 	ZeroAddress = common.HexToAddress("0x0000000000000000000000000000000000000000")
 )
 
-// IsInSlice determines whether v is in slice s
-func IsInSlice[T comparable](v T, s []T) bool {
-	for _, e := range s {
-		if v == e {
-			return true
-		}
-	}
-
-	return false
-}
-
 type confirmer interface {
 	TransactionReceipt(ctx context.Context, txHash common.Hash) (*types.Receipt, error)
 	BlockNumber(ctx context.Context) (uint64, error)
diff --git a/packages/relayer/types_test.go b/packages/relayer/types_test.go
index 0444a7d7148..069f1229512 100644
--- a/packages/relayer/types_test.go
+++ b/packages/relayer/types_test.go
@@ -13,16 +13,6 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func Test_IsInSlice(t *testing.T) {
-	if IsInSlice("fake", []string{}) {
-		t.Fatal()
-	}
-
-	if !IsInSlice("real", []string{"real"}) {
-		t.Fatal()
-	}
-}
-
 type mockConfirmer struct {
 }
 
diff --git a/packages/relayer/watchdog/watchdog.go b/packages/relayer/watchdog/watchdog.go
index 8de4f9df6c5..7a8c7826dbb 100644
--- a/packages/relayer/watchdog/watchdog.go
+++ b/packages/relayer/watchdog/watchdog.go
@@ -66,8 +66,6 @@ type Watchdog struct {
 	srcBridge  relayer.Bridge
 	destBridge relayer.Bridge
 
-	mu *sync.Mutex
-
 	watchdogAddr common.Address
 
 	confirmations uint64
@@ -80,7 +78,7 @@ type Watchdog struct {
 
 	msgCh chan queue.Message
 
-	wg *sync.WaitGroup
+	wg sync.WaitGroup
 
 	srcChainId  *big.Int
 	destChainId *big.Int
@@ -194,8 +192,6 @@ func InitFromConfig(ctx context.Context, w *Watchdog, cfg *Config) error {
 	w.confirmations = cfg.Confirmations
 
 	w.msgCh = make(chan queue.Message)
-	w.wg = &sync.WaitGroup{}
-	w.mu = &sync.Mutex{}
 
 	w.backOffRetryInterval = time.Duration(cfg.BackoffRetryInterval) * time.Second
 	w.backOffMaxRetries = cfg.BackOffMaxRetrys
@@ -230,7 +226,7 @@ func (w *Watchdog) Start() error {
 	go func() {
 		if err := backoff.Retry(func() error {
 			slog.Info("attempting backoff queue subscription")
-			if err := w.queue.Subscribe(ctx, w.msgCh, w.wg); err != nil {
+			if err := w.queue.Subscribe(ctx, w.msgCh, &w.wg); err != nil {
 				slog.Error("processor queue subscription error", "err", err.Error())
 				return err
 			}
@@ -247,7 +243,7 @@ func (w *Watchdog) Start() error {
 
 	go func() {
 		if err := backoff.Retry(func() error {
-			return utils.ScanBlocks(ctx, w.srcEthClient, w.wg)
+			return utils.ScanBlocks(ctx, w.srcEthClient, &w.wg)
 		}, backoff.NewConstantBackOff(5*time.Second)); err != nil {
 			slog.Error("scan blocks backoff retry", "error", err)
 		}