beacon/light/api: fixed blsync update query

beacon/light/api/light_api.go

@@ -23,7 +23,6 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"net/url"
 	"sync"
 	"time"
 
@@ -112,6 +111,9 @@ type BeaconLightApi struct {
 }
 
 func NewBeaconLightApi(url string, customHeaders map[string]string) *BeaconLightApi {
+	if len(url) > 0 && url[len(url)-1] == '/' {
+		url = url[:len(url)-1]
+	}
 	return &BeaconLightApi{
 		url: url,
 		client: &http.Client{
@@ -122,11 +124,7 @@ func NewBeaconLightApi(url string, customHeaders map[string]string) *BeaconLight
 }
 
 func (api *BeaconLightApi) httpGet(path string) ([]byte, error) {
-	uri, err := api.buildURL(path, nil)
-	if err != nil {
-		return nil, err
-	}
-	req, err := http.NewRequest("GET", uri, nil)
+	req, err := http.NewRequest("GET", api.url+path, nil)
 	if err != nil {
 		return nil, err
 	}
@@ -551,12 +549,8 @@ func (api *BeaconLightApi) StartHeadListener(listener HeadEventListener) func()
 func (api *BeaconLightApi) startEventStream(ctx context.Context, listener *HeadEventListener) *eventsource.Stream {
 	for retry := true; retry; retry = ctxSleep(ctx, 5*time.Second) {
 		log.Trace("Sending event subscription request")
-		uri, err := api.buildURL("/eth/v1/events", map[string][]string{"topics": {"head", "light_client_finality_update", "light_client_optimistic_update"}})
-		if err != nil {
-			listener.OnError(fmt.Errorf("error creating event subscription URL: %v", err))
-			continue
-		}
-		req, err := http.NewRequestWithContext(ctx, "GET", uri, nil)
+		path := "/eth/v1/events?topics=head&topics=light_client_finality_update&topics=light_client_optimistic_update"
+		req, err := http.NewRequestWithContext(ctx, "GET", api.url+path, nil)
 		if err != nil {
 			listener.OnError(fmt.Errorf("error creating event subscription request: %v", err))
 			continue
@@ -585,15 +579,3 @@ func ctxSleep(ctx context.Context, timeout time.Duration) (ok bool) {
 		return false
 	}
 }
-
-func (api *BeaconLightApi) buildURL(path string, params url.Values) (string, error) {
-	uri, err := url.Parse(api.url)
-	if err != nil {
-		return "", err
-	}
-	uri = uri.JoinPath(path)
-	if params != nil {
-		uri.RawQuery = params.Encode()
-	}
-	return uri.String(), nil
-}