op-node: Remove unused field in `ChannelBank` (#12001)

op-node/rollup/derive/channel_bank.go

@@ -37,14 +37,13 @@ type ChannelBank struct {
 	channels     map[ChannelID]*Channel // channels by ID
 	channelQueue []ChannelID            // channels in FIFO order
 
-	prev    NextFrameProvider
-	fetcher L1Fetcher
+	prev NextFrameProvider
 }
 
 var _ ResettableStage = (*ChannelBank)(nil)
 
 // NewChannelBank creates a ChannelBank, which should be Reset(origin) before use.
-func NewChannelBank(log log.Logger, cfg *rollup.Config, prev NextFrameProvider, fetcher L1Fetcher, m Metrics) *ChannelBank {
+func NewChannelBank(log log.Logger, cfg *rollup.Config, prev NextFrameProvider, m Metrics) *ChannelBank {
 	return &ChannelBank{
 		log:          log,
 		spec:         rollup.NewChainSpec(cfg),
@@ -52,7 +51,6 @@ func NewChannelBank(log log.Logger, cfg *rollup.Config, prev NextFrameProvider,
 		channels:     make(map[ChannelID]*Channel),
 		channelQueue: make([]ChannelID, 0, 10),
 		prev:         prev,
-		fetcher:      fetcher,
 	}
 }
 

op-node/rollup/derive/channel_bank_test.go

@@ -102,7 +102,7 @@ func TestChannelBankSimple(t *testing.T) {
 
 	cfg := &rollup.Config{ChannelTimeoutBedrock: 10}
 
-	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, nil, metrics.NoopMetrics)
+	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, metrics.NoopMetrics)
 
 	// Load the first frame
 	out, err := cb.NextData(context.Background())
@@ -146,7 +146,7 @@ func TestChannelBankInterleavedPreCanyon(t *testing.T) {
 
 	cfg := &rollup.Config{ChannelTimeoutBedrock: 10, CanyonTime: nil}
 
-	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, nil, metrics.NoopMetrics)
+	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, metrics.NoopMetrics)
 
 	// Load a:0
 	out, err := cb.NextData(context.Background())
@@ -211,7 +211,7 @@ func TestChannelBankInterleaved(t *testing.T) {
 	ct := uint64(0)
 	cfg := &rollup.Config{ChannelTimeoutBedrock: 10, CanyonTime: &ct}
 
-	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, nil, metrics.NoopMetrics)
+	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, metrics.NoopMetrics)
 
 	// Load a:0
 	out, err := cb.NextData(context.Background())
@@ -271,7 +271,7 @@ func TestChannelBankDuplicates(t *testing.T) {
 
 	cfg := &rollup.Config{ChannelTimeoutBedrock: 10}
 
-	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, nil, metrics.NoopMetrics)
+	cb := NewChannelBank(testlog.Logger(t, log.LevelCrit), cfg, input, metrics.NoopMetrics)
 
 	// Load the first frame
 	out, err := cb.NextData(context.Background())

op-node/rollup/derive/pipeline.go

@@ -84,7 +84,7 @@ func NewDerivationPipeline(log log.Logger, rollupCfg *rollup.Config, l1Fetcher L
 	dataSrc := NewDataSourceFactory(log, rollupCfg, l1Fetcher, l1Blobs, altDA) // auxiliary stage for L1Retrieval
 	l1Src := NewL1Retrieval(log, dataSrc, l1Traversal)
 	frameQueue := NewFrameQueue(log, l1Src)
-	bank := NewChannelBank(log, rollupCfg, frameQueue, l1Fetcher, metrics)
+	bank := NewChannelBank(log, rollupCfg, frameQueue, metrics)
 	chInReader := NewChannelInReader(rollupCfg, log, bank, metrics)
 	batchQueue := NewBatchQueue(log, rollupCfg, chInReader, l2Source)
 	attrBuilder := NewFetchingAttributesBuilder(rollupCfg, l1Fetcher, l2Source)