Multiple BN HTTP resolver

validator/accounts/cli_manager.go

@@ -87,7 +87,10 @@ func (acm *CLIManager) prepareBeaconClients(ctx context.Context) (*iface.Validat
 		acm.beaconApiTimeout,
 	)
 
-	restHandler := beaconApi.NewBeaconApiJsonRestHandler(http.Client{Timeout: acm.beaconApiTimeout}, acm.beaconApiEndpoint)
+	restHandler := beaconApi.NewBeaconApiJsonRestHandler(
+		http.Client{Timeout: acm.beaconApiTimeout},
+		acm.beaconApiEndpoint,
+	)
 	validatorClient := validatorClientFactory.NewValidatorClient(conn, restHandler)
 	nodeClient := nodeClientFactory.NewNodeClient(conn, restHandler)
 

validator/accounts/testing/mock.go

@@ -249,3 +249,11 @@ func (*Validator) EventStreamIsRunning() bool {
 func (*Validator) HealthTracker() *beacon.NodeHealthTracker {
 	panic("implement me")
 }
+
+func (*Validator) RetrieveHost() string {
+	panic("implement me")
+}
+
+func (*Validator) UpdateHost(_ string) {
+	panic("implement me")
+}

validator/client/beacon-api/beacon_api_validator_client.go

@@ -230,3 +230,11 @@ func wrapInMetrics[Resp any](action string, f func() (Resp, error)) (Resp, error
 	}
 	return resp, err
 }
+
+func (c *beaconApiValidatorClient) RetrieveHost() string {
+	return c.jsonRestHandler.Host()
+}
+
+func (c *beaconApiValidatorClient) UpdateHost(host string) {
+	c.jsonRestHandler.ChangeHost(host)
+}

validator/client/beacon-api/beacon_api_validator_client_test.go

@@ -202,3 +202,32 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockError(t *testing.T) {
 	assert.ErrorContains(t, expectedErr.Error(), err)
 	assert.DeepEqual(t, expectedResp, resp)
 }
+
+func TestBeaconApiValidatorClient_Host(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	hosts := []string{"http://localhost:8080", "http://localhost:8081"}
+	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	jsonRestHandler.EXPECT().ChangeHost(
+		hosts[0],
+	).Times(1)
+	jsonRestHandler.EXPECT().Host().Return(
+		hosts[0],
+	).Times(1)
+
+	validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient.UpdateHost(hosts[0])
+	host := validatorClient.RetrieveHost()
+	require.Equal(t, hosts[0], host)
+
+	jsonRestHandler.EXPECT().ChangeHost(
+		hosts[1],
+	).Times(1)
+	jsonRestHandler.EXPECT().Host().Return(
+		hosts[1],
+	).Times(1)
+	validatorClient.UpdateHost(hosts[1])
+	host = validatorClient.RetrieveHost()
+	require.Equal(t, hosts[1], host)
+}

validator/client/beacon-api/json_rest_handler.go

@@ -18,6 +18,7 @@ type JsonRestHandler interface {
 	Post(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer, resp interface{}) error
 	HttpClient() *http.Client
 	Host() string
+	ChangeHost(newHost string)
 }
 
 type BeaconApiJsonRestHandler struct {
@@ -33,19 +34,19 @@ func NewBeaconApiJsonRestHandler(client http.Client, host string) JsonRestHandle
 	}
 }
 
-// GetHttpClient returns the underlying HTTP client of the handler
-func (c BeaconApiJsonRestHandler) HttpClient() *http.Client {
+// HttpClient returns the underlying HTTP client of the handler
+func (c *BeaconApiJsonRestHandler) HttpClient() *http.Client {
 	return &c.client
 }
 
-// GetHost returns the underlying HTTP host
-func (c BeaconApiJsonRestHandler) Host() string {
+// Host returns the underlying HTTP host
+func (c *BeaconApiJsonRestHandler) Host() string {
 	return c.host
 }
 
 // Get sends a GET request and decodes the response body as a JSON object into the passed in object.
 // If an HTTP error is returned, the body is decoded as a DefaultJsonError JSON object and returned as the first return value.
-func (c BeaconApiJsonRestHandler) Get(ctx context.Context, endpoint string, resp interface{}) error {
+func (c *BeaconApiJsonRestHandler) Get(ctx context.Context, endpoint string, resp interface{}) error {
 	url := c.host + endpoint
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
@@ -67,7 +68,7 @@ func (c BeaconApiJsonRestHandler) Get(ctx context.Context, endpoint string, resp
 
 // Post sends a POST request and decodes the response body as a JSON object into the passed in object.
 // If an HTTP error is returned, the body is decoded as a DefaultJsonError JSON object and returned as the first return value.
-func (c BeaconApiJsonRestHandler) Post(
+func (c *BeaconApiJsonRestHandler) Post(
 	ctx context.Context,
 	apiEndpoint string,
 	headers map[string]string,
@@ -134,3 +135,7 @@ func decodeResp(httpResp *http.Response, resp interface{}) error {
 
 	return nil
 }
+
+func (c *BeaconApiJsonRestHandler) ChangeHost(newHost string) {
+	c.host = newHost
+}

validator/client/grpc-api/grpc_validator_client.go

@@ -142,11 +142,11 @@ func (c *grpcValidatorClient) AggregatedSigAndAggregationBits(
 	return c.beaconNodeValidatorClient.AggregatedSigAndAggregationBits(ctx, in)
 }
 
-func (grpcValidatorClient) GetAggregatedSelections(context.Context, []iface.BeaconCommitteeSelection) ([]iface.BeaconCommitteeSelection, error) {
+func (*grpcValidatorClient) GetAggregatedSelections(context.Context, []iface.BeaconCommitteeSelection) ([]iface.BeaconCommitteeSelection, error) {
 	return nil, iface.ErrNotSupported
 }
 
-func (grpcValidatorClient) GetAggregatedSyncSelections(context.Context, []iface.SyncCommitteeSelection) ([]iface.SyncCommitteeSelection, error) {
+func (*grpcValidatorClient) GetAggregatedSyncSelections(context.Context, []iface.SyncCommitteeSelection) ([]iface.SyncCommitteeSelection, error) {
 	return nil, iface.ErrNotSupported
 }
 
@@ -245,3 +245,12 @@ func (c *grpcValidatorClient) StartEventStream(ctx context.Context, topics []str
 func (c *grpcValidatorClient) EventStreamIsRunning() bool {
 	return c.isEventStreamRunning
 }
+
+func (*grpcValidatorClient) RetrieveHost() string {
+	log.Warn(iface.ErrNotSupported)
+	return ""
+}
+
+func (*grpcValidatorClient) UpdateHost(_ string) {
+	log.Warn(iface.ErrNotSupported)
+}

validator/client/iface/validator.go

@@ -68,6 +68,8 @@ type Validator interface {
 	SetGraffiti(ctx context.Context, pubKey [fieldparams.BLSPubkeyLength]byte, graffiti []byte) error
 	DeleteGraffiti(ctx context.Context, pubKey [fieldparams.BLSPubkeyLength]byte) error
 	HealthTracker() *beacon.NodeHealthTracker
+	RetrieveHost() string
+	UpdateHost(host string)
 }
 
 // SigningFunc interface defines a type for the a function that signs a message

validator/client/iface/validator_client.go

@@ -150,4 +150,6 @@ type ValidatorClient interface {
 	EventStreamIsRunning() bool
 	GetAggregatedSelections(ctx context.Context, selections []BeaconCommitteeSelection) ([]BeaconCommitteeSelection, error)
 	GetAggregatedSyncSelections(ctx context.Context, selections []SyncCommitteeSelection) ([]SyncCommitteeSelection, error)
+	RetrieveHost() string
+	UpdateHost(host string)
 }