Set builder get payload timeout to 3s (#11413)

api/client/builder/client.go

@@ -10,6 +10,7 @@ import (
 	"net/http"
 	"net/url"
 	"text/template"
+	"time"
 
 	"github.com/pkg/errors"
 	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
@@ -31,6 +32,7 @@ const (
 
 var errMalformedHostname = errors.New("hostname must include port, separated by one colon, like example.com:3500")
 var errMalformedRequest = errors.New("required request data are missing")
+var submitBlindedBlockTimeout = 3 * time.Second
 
 // ClientOpt is a functional option for the Client type (http.Client wrapper)
 type ClientOpt func(*Client)
@@ -252,7 +254,11 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb *ethpb.SignedBlinded
 	if err != nil {
 		return nil, errors.Wrap(err, "error encoding the SignedBlindedBeaconBlockBellatrix value body in SubmitBlindedBlock")
 	}
+
+	ctx, cancel := context.WithTimeout(ctx, submitBlindedBlockTimeout)
+	defer cancel()
 	rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body))
+
 	if err != nil {
 		return nil, errors.Wrap(err, "error posting the SignedBlindedBeaconBlockBellatrix to the builder api")
 	}