eth/filters: return -32602 when exceeding the block range limit (#34647)

Co-authored-by: Felix Lange <fjl@twurst.com>

eth/filters/filter.go

@@ -19,7 +19,6 @@ package filters
 import (
 	"context"
 	"errors"
-	"fmt"
 	"math"
 	"math/big"
 	"slices"
@@ -147,7 +146,7 @@ func (f *Filter) Logs(ctx context.Context) ([]*types.Log, error) {
 		return nil, err
 	}
 	if f.rangeLimit != 0 && (end-begin) > f.rangeLimit {
-		return nil, fmt.Errorf("exceed maximum block range: %d", f.rangeLimit)
+		return nil, invalidParamsErr("exceed maximum block range %d", f.rangeLimit)
 	}
 	return f.rangeLogs(ctx, begin, end)
 }

eth/filters/filter_test.go

@@ -19,6 +19,7 @@ package filters
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"math/big"
 	"strings"
 	"testing"
@@ -634,7 +635,19 @@ func TestRangeLimit(t *testing.T) {
 	// Set rangeLimit to 5, but request a range of 9 (end - begin = 9, from 0 to 9)
 	filter := sys.NewRangeFilter(0, 9, nil, nil, 5)
 	_, err = filter.Logs(context.Background())
-	if err == nil || !strings.Contains(err.Error(), "exceed maximum block range") {
-		t.Fatalf("expected range limit error, got %v", err)
+	if err == nil {
+		t.Fatal("expected range limit error, got nil")
+	}
+
+	var re rpc.Error
+	if errors.As(err, &re) {
+		if re.ErrorCode() != -32602 {
+			t.Fatalf("expected error code -32602, got %d", re.ErrorCode())
+		}
+		if re.Error() != "exceed maximum block range 5" {
+			t.Fatalf("expected error message 'exceed maximum block range 5', got %q", re.Error())
+		}
+	} else {
+		t.Fatalf("expected rpc error, got %v", err)
 	}
 }