dev: fix: errorcheck lint issues

common/lru/basiclru_test.go

@@ -27,7 +27,10 @@ import (
 // Some of these test cases were adapted
 // from https://github.com/hashicorp/golang-lru/blob/master/simplelru/lru_test.go
 
+// nolint:gocognit
 func TestBasicLRU(t *testing.T) {
+	t.Parallel()
+
 	cache := NewBasicLRU[int, int](128)
 
 	for i := 0; i < 256; i++ {
@@ -210,9 +213,9 @@ func BenchmarkLRU(b *testing.B) {
 
 	for i := range keys {
 		b := make([]byte, 32)
-		crand.Read(b)
+		_, _ = crand.Read(b)
 		keys[i] = string(b)
-		crand.Read(b)
+		_, _ = crand.Read(b)
 		values[i] = b
 	}
 

common/types_test.go

@@ -179,7 +179,7 @@ func TestMixedcaseAddressMarshal(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	json.Unmarshal(blob, &output)
+	_ = json.Unmarshal(blob, &output)
 
 	if output != input {
 		t.Fatal("Failed to marshal/unmarshal MixedcaseAddress object")

crypto/signify/signify.go

@@ -96,5 +96,6 @@ func SignFile(input string, output string, key string, untrustedComment string,
 	fmt.Fprintln(out, base64.StdEncoding.EncodeToString(dataSig))
 	fmt.Fprintln(out, "trusted comment:", trustedComment)
 	fmt.Fprintln(out, base64.StdEncoding.EncodeToString(commentSig))
+	// nolint:gosec
 	return os.WriteFile(output, out.Bytes(), 0644)
 }

ethdb/dbtest/testsuite.go

@@ -399,7 +399,7 @@ func BenchDatabaseSuite(b *testing.B, New func() ethdb.KeyValueStore) {
 			defer db.Close()
 
 			for i := 0; i < len(keys); i++ {
-				db.Put(keys[i], vals[i])
+				_ = db.Put(keys[i], vals[i])
 			}
 		}
 		b.Run("WriteSorted", func(b *testing.B) {
@@ -417,13 +417,13 @@ func BenchDatabaseSuite(b *testing.B, New func() ethdb.KeyValueStore) {
 			defer db.Close()
 
 			for i := 0; i < len(keys); i++ {
-				db.Put(keys[i], vals[i])
+				_ = db.Put(keys[i], vals[i])
 			}
 			b.ResetTimer()
 			b.ReportAllocs()
 
 			for i := 0; i < len(keys); i++ {
-				db.Get(keys[i])
+				_, _ = db.Get(keys[i])
 			}
 		}
 		b.Run("ReadSorted", func(b *testing.B) {
@@ -441,7 +441,7 @@ func BenchDatabaseSuite(b *testing.B, New func() ethdb.KeyValueStore) {
 			defer db.Close()
 
 			for i := 0; i < len(keys); i++ {
-				db.Put(keys[i], vals[i])
+				_ = db.Put(keys[i], vals[i])
 			}
 			b.ResetTimer()
 			b.ReportAllocs()
@@ -470,9 +470,9 @@ func BenchDatabaseSuite(b *testing.B, New func() ethdb.KeyValueStore) {
 
 			batch := db.NewBatch()
 			for i := 0; i < len(keys); i++ {
-				batch.Put(keys[i], vals[i])
+				_ = batch.Put(keys[i], vals[i])
 			}
-			batch.Write()
+			_ = batch.Write()
 		}
 		b.Run("BenchWriteSorted", func(b *testing.B) {
 			benchBatchWrite(b, sKeys, sVals)
@@ -504,8 +504,8 @@ func randBytes(length int) []byte {
 }
 
 func makeDataset(size, ksize, vsize int, order bool) ([][]byte, [][]byte) {
-	var keys [][]byte
-	var vals [][]byte
+	keys := make([][]byte, 0, ksize)
+	vals := make([][]byte, 0, vsize)
 
 	for i := 0; i < size; i += 1 {
 		keys = append(keys, randBytes(ksize))

ethdb/pebble/pebble.go

@@ -517,15 +517,15 @@ type batch struct {
 
 // Put inserts the given value into the batch for later committing.
 func (b *batch) Put(key, value []byte) error {
-	b.b.Set(key, value, nil)
+	_ = b.b.Set(key, value, nil)
 	b.size += len(key) + len(value)
 
 	return nil
 }
 
-// Delete inserts the a key removal into the batch for later committing.
+// Delete inserts the key removal into the batch for later committing.
 func (b *batch) Delete(key []byte) error {
-	b.b.Delete(key, nil)
+	_ = b.b.Delete(key, nil)
 	b.size += len(key)
 
 	return nil
@@ -559,9 +559,9 @@ func (b *batch) Replay(w ethdb.KeyValueWriter) error {
 		// The (k,v) slices might be overwritten if the batch is reset/reused,
 		// and the receiver should copy them if they are to be retained long-term.
 		if kind == pebble.InternalKeyKindSet {
-			w.Put(k, v)
+			_ = w.Put(k, v)
 		} else if kind == pebble.InternalKeyKindDelete {
-			w.Delete(k)
+			_ = w.Delete(k)
 		} else {
 			return fmt.Errorf("unhandled operation, keytype: %v", kind)
 		}

log/format_test.go

@@ -95,7 +95,7 @@ func TestPrettyUint256(t *testing.T) {
 
 	for _, tt := range tests {
 		v := new(uint256.Int)
-		v.SetFromDecimal(tt.int)
+		_ = v.SetFromDecimal(tt.int)
 
 		if have := formatLogfmtUint256(v); have != tt.s {
 			t.Errorf("invalid output %s, want %s", have, tt.s)

metrics/counter_float64.go

@@ -58,7 +58,7 @@ func NewRegisteredCounterFloat64(name string, r Registry) CounterFloat64 {
 	if nil == r {
 		r = DefaultRegistry
 	}
-	r.Register(name, c)
+	_ = r.Register(name, c)
 
 	return c
 }
@@ -73,7 +73,7 @@ func NewRegisteredCounterFloat64Forced(name string, r Registry) CounterFloat64 {
 	if nil == r {
 		r = DefaultRegistry
 	}
-	r.Register(name, c)
+	_ = r.Register(name, c)
 
 	return c
 }
@@ -109,6 +109,7 @@ type NilCounterFloat64 struct{}
 func (NilCounterFloat64) Clear() {}
 
 // Count is a no-op.
+// nolint:goconst
 func (NilCounterFloat64) Count() float64 { return 0.0 }
 
 // Dec is a no-op.

metrics/counter_float_64_test.go

@@ -73,11 +73,13 @@ func TestCounterFloat64Dec2(t *testing.T) {
 	}
 }
 
+// nolint:goconst
 func TestCounterFloat64Inc1(t *testing.T) {
 	t.Parallel()
 
 	c := NewCounterFloat64()
 	c.Inc(1.0)
+
 	if count := c.Count(); count != 1.0 {
 		t.Errorf("c.Count(): 1.0 != %v\n", count)
 	}
@@ -117,11 +119,13 @@ func TestCounterFloat64Zero(t *testing.T) {
 	}
 }
 
+// nolint:goconst
 func TestGetOrRegisterCounterFloat64(t *testing.T) {
 	t.Parallel()
 
 	r := NewRegistry()
 	NewRegisteredCounterFloat64("foo", r).Inc(47.0)
+
 	if c := GetOrRegisterCounterFloat64("foo", r); c.Count() != 47.0 {
 		t.Fatal(c)
 	}

metrics/syslog.go

@@ -16,20 +16,20 @@ func Syslog(r Registry, d time.Duration, w *syslog.Writer) {
 		r.Each(func(name string, i interface{}) {
 			switch metric := i.(type) {
 			case Counter:
-				w.Info(fmt.Sprintf("counter %s: count: %d", name, metric.Count()))
+				_ = w.Info(fmt.Sprintf("counter %s: count: %d", name, metric.Count()))
 			case CounterFloat64:
-				w.Info(fmt.Sprintf("counter %s: count: %f", name, metric.Count()))
+				_ = w.Info(fmt.Sprintf("counter %s: count: %f", name, metric.Count()))
 			case Gauge:
-				w.Info(fmt.Sprintf("gauge %s: value: %d", name, metric.Value()))
+				_ = w.Info(fmt.Sprintf("gauge %s: value: %d", name, metric.Value()))
 			case GaugeFloat64:
-				w.Info(fmt.Sprintf("gauge %s: value: %f", name, metric.Value()))
+				_ = w.Info(fmt.Sprintf("gauge %s: value: %f", name, metric.Value()))
 			case Healthcheck:
 				metric.Check()
-				w.Info(fmt.Sprintf("healthcheck %s: error: %v", name, metric.Error()))
+				_ = w.Info(fmt.Sprintf("healthcheck %s: error: %v", name, metric.Error()))
 			case Histogram:
 				h := metric.Snapshot()
 				ps := h.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
-				w.Info(fmt.Sprintf(
+				_ = w.Info(fmt.Sprintf(
 					"histogram %s: count: %d min: %d max: %d mean: %.2f stddev: %.2f median: %.2f 75%%: %.2f 95%%: %.2f 99%%: %.2f 99.9%%: %.2f",
 					name,
 					h.Count(),
@@ -45,7 +45,7 @@ func Syslog(r Registry, d time.Duration, w *syslog.Writer) {
 				))
 			case Meter:
 				m := metric.Snapshot()
-				w.Info(fmt.Sprintf(
+				_ = w.Info(fmt.Sprintf(
 					"meter %s: count: %d 1-min: %.2f 5-min: %.2f 15-min: %.2f mean: %.2f",
 					name,
 					m.Count(),
@@ -57,7 +57,7 @@ func Syslog(r Registry, d time.Duration, w *syslog.Writer) {
 			case Timer:
 				t := metric.Snapshot()
 				ps := t.Percentiles([]float64{0.5, 0.75, 0.95, 0.99, 0.999})
-				w.Info(fmt.Sprintf(
+				_ = w.Info(fmt.Sprintf(
 					"timer %s: count: %d min: %d max: %d mean: %.2f stddev: %.2f median: %.2f 75%%: %.2f 95%%: %.2f 99%%: %.2f 99.9%%: %.2f 1-min: %.2f 5-min: %.2f 15-min: %.2f mean-rate: %.2f",
 					name,
 					t.Count(),

p2p/nat/natpmp.go

@@ -61,7 +61,7 @@ func (n *pmp) AddMapping(protocol string, extport, intport int, name string, lif
 	// to the caller.
 	if uint16(extport) != res.MappedExternalPort {
 		// Destroy the mapping in NAT device.
-		n.c.AddPortMapping(strings.ToLower(protocol), intport, 0, 0)
+		_, _ = n.c.AddPortMapping(strings.ToLower(protocol), intport, 0, 0)
 		return fmt.Errorf("port %d already mapped to another address (%s)", extport, protocol)
 	}
 

p2p/netutil/iptrack_test.go

@@ -123,8 +123,8 @@ func TestIPTrackerForceGC(t *testing.T) {
 	for i := 0; i < 5*max; i++ {
 		e1 := make([]byte, 4)
 		e2 := make([]byte, 4)
-		crand.Read(e1)
-		crand.Read(e2)
+		_, _ = crand.Read(e1)
+		_, _ = crand.Read(e2)
 		it.AddStatement(string(e1), string(e2))
 		it.AddContact(string(e1))
 		clock.Run(rate)

rpc/client.go

@@ -667,7 +667,7 @@ func (c *Client) read(codec ServerCodec) {
 		msgs, batch, err := codec.readBatch()
 		if _, ok := err.(*json.SyntaxError); ok {
 			msg := errorMessage(&parseError{err.Error()})
-			codec.writeJSON(context.Background(), msg, true)
+			_ = codec.writeJSON(context.Background(), msg, true)
 		}
 		if err != nil {
 			c.readErr <- err

rpc/handler.go

@@ -167,7 +167,7 @@ func (b *batchCallBuffer) doWrite(ctx context.Context, conn jsonWriter, isErrorR
 	b.wrote = true // can only write once
 
 	if len(b.resp) > 0 {
-		conn.writeJSON(ctx, b.resp, isErrorResponse)
+		_ = conn.writeJSON(ctx, b.resp, isErrorResponse)
 	}
 }
 
@@ -177,7 +177,7 @@ func (h *handler) handleBatch(msgs []*jsonrpcMessage) {
 	if len(msgs) == 0 {
 		h.startCallProc(func(cp *callProc) {
 			resp := errorMessage(&invalidRequestError{"empty batch"})
-			h.conn.writeJSON(cp.ctx, resp, true)
+			_ = h.conn.writeJSON(cp.ctx, resp, true)
 		})
 		return
 	}
@@ -258,7 +258,7 @@ func (h *handler) handleMsg(msg *jsonrpcMessage) {
 				cancel()
 				responded.Do(func() {
 					resp := msg.errorResponse(&internalServerError{errcodeTimeout, errMsgTimeout})
-					h.conn.writeJSON(cp.ctx, resp, true)
+					_ = h.conn.writeJSON(cp.ctx, resp, true)
 				})
 			})
 		}
@@ -270,11 +270,11 @@ func (h *handler) handleMsg(msg *jsonrpcMessage) {
 		h.addSubscriptions(cp.notifiers)
 		if answer != nil {
 			responded.Do(func() {
-				h.conn.writeJSON(cp.ctx, answer, false)
+				_ = h.conn.writeJSON(cp.ctx, answer, false)
 			})
 		}
 		for _, n := range cp.notifiers {
-			n.activate()
+			_ = n.activate()
 		}
 	})
 }

rpc/server.go

@@ -156,7 +156,7 @@ func (s *Server) serveSingleRequest(ctx context.Context, codec ServerCodec) {
 	if err != nil {
 		if err != io.EOF {
 			resp := errorMessage(&invalidMessageError{"parse error"})
-			codec.writeJSON(ctx, resp, true)
+			_ = codec.writeJSON(ctx, resp, true)
 		}
 		return
 	}

rpc/types.go

@@ -76,6 +76,7 @@ const (
 // Returned errors:
 // - an invalid block number error when the given argument isn't a known strings
 // - an out of range error when the given block number is either too little or too large
+// nolint:goconst
 func (bn *BlockNumber) UnmarshalJSON(data []byte) error {
 	input := strings.TrimSpace(string(data))
 	if len(input) >= 2 && input[0] == '"' && input[len(input)-1] == '"' {