feat: ErrorsConfig and LatencyConfig are now pointers

internal/config/config.go

@@ -194,12 +194,12 @@ type LatencyConfig struct {
 }
 
 type RoutingConfig struct {
-	AlwaysRoute     *bool         `yaml:"alwaysRoute"`
-	Errors          ErrorsConfig  `yaml:"errors"`
-	Latency         LatencyConfig `yaml:"latency"`
-	MaxBlocksBehind int           `yaml:"maxBlocksBehind"`
-	DetectionWindow time.Duration `yaml:"detectionWindow"`
-	BanWindow       time.Duration `yaml:"banWindow"`
+	AlwaysRoute     *bool          `yaml:"alwaysRoute"`
+	Errors          *ErrorsConfig  `yaml:"errors"`
+	Latency         *LatencyConfig `yaml:"latency"`
+	MaxBlocksBehind int            `yaml:"maxBlocksBehind"`
+	DetectionWindow time.Duration  `yaml:"detectionWindow"`
+	BanWindow       time.Duration  `yaml:"banWindow"`
 }
 
 type ChainCacheConfig struct {
@@ -245,11 +245,15 @@ func (c *SingleChainConfig) isValid() bool {
 }
 
 func (r *RoutingConfig) isRoutingConfigValid() bool {
-	// TODO(polsar): Validate the HTTP codes.
+	// TODO(polsar): Validate the HTTP and JSON RPC codes, and potentially methods as well.
 	return r.isErrorRateValid()
 }
 
 func (r *RoutingConfig) isErrorRateValid() bool {
+	if r.Errors == nil {
+		return true
+	}
+
 	rate := r.Errors.Rate
 	isValid := 0.0 <= rate && rate <= 1.0
 

internal/config/config_test.go

@@ -4,7 +4,7 @@ import (
 	"testing"
 	"time"
 
-	"github.com/google/go-cmp/cmp"
+	"github.com/google/go-cmp/cmp" //nolint:imports // Legacy
 	"github.com/stretchr/testify/assert"
 )
 
@@ -371,7 +371,7 @@ func TestParseConfig_ValidConfigLatencyRouting_AllFieldsSet(t *testing.T) {
 			Routing: RoutingConfig{
 				DetectionWindow: 10 * time.Minute,
 				BanWindow:       50 * time.Minute,
-				Errors: ErrorsConfig{
+				Errors: &ErrorsConfig{
 					Rate: 0.25,
 					HTTPCodes: []string{
 						"5xx",
@@ -384,7 +384,7 @@ func TestParseConfig_ValidConfigLatencyRouting_AllFieldsSet(t *testing.T) {
 						"internal server error",
 					},
 				},
-				Latency: LatencyConfig{
+				Latency: &LatencyConfig{
 					Threshold: 1000 * time.Millisecond,
 					Methods: []MethodConfig{
 						{