diff --git a/examples/server/run_server/demo_interface.go b/examples/server/run_server/demo_interface.go
index 0cca35b..2575949 100644
--- a/examples/server/run_server/demo_interface.go
+++ b/examples/server/run_server/demo_interface.go
@@ -64,6 +64,6 @@ func (d *demoServiceProvider) CreatePikeDestinationResponse(
 	alias, domain string,
 	satoshis uint64,
 	metaData *server.RequestMetadata,
-) (*paymail.PikePaymentDestinationsResponse, error) {
+) (*paymail.PikePaymentOutputsResponse, error) {
 	return nil, nil
 }
diff --git a/pike.go b/pike.go
index 8fdbcdf..6e8f996 100644
--- a/pike.go
+++ b/pike.go
@@ -9,17 +9,20 @@ import (
 	"time"
 )
 
+// PikeContactRequestResponse is PIKE wrapper for StandardResponse
 type PikeContactRequestResponse struct {
 	StandardResponse
 }
 
+// PikeContactRequestPayload is a payload used to request a contact
 type PikeContactRequestPayload struct {
 	FullName string `json:"fullName"`
 	Paymail  string `json:"paymail"`
 }
 
+// PikePaymentOutputsPayload is a payload needed to get payment outputs
 // TODO: check if everything is needed after whole PIKE implementation
-type PikePaymentDestinationsRequest struct {
+type PikePaymentOutputsPayload struct {
 	SenderName    string    `json:"senderName"`
 	SenderPaymail string    `json:"senderPaymail"`
 	Amount        uint64    `json:"amount"`
@@ -28,12 +31,14 @@ type PikePaymentDestinationsRequest struct {
 	Signature     string    `json:"signature"`
 }
 
-type PikePaymentDestinationsResponse struct {
-	Outputs   []PikePaymentDestination `json:"outputs"`
-	Reference string                   `json:"reference"`
+// PikePaymentOutputsResponse is a response which contain output templates
+type PikePaymentOutputsResponse struct {
+	Outputs   []PikePaymentOutput `json:"outputs"`
+	Reference string              `json:"reference"`
 }
 
-type PikePaymentDestination struct {
+// PikePaymentOutput is a single output template with satoshis
+type PikePaymentOutput struct {
 	Script   string `json:"script"`
 	Satoshis int    `json:"satoshis"`
 }
diff --git a/server/capabilities.go b/server/capabilities.go
index 4e33ed1..4176f59 100644
--- a/server/capabilities.go
+++ b/server/capabilities.go
@@ -179,7 +179,11 @@ func (c *Configuration) EnrichCapabilities(host string) (*paymail.CapabilitiesPa
 	for key, cap := range c.nestedCapabilities {
 		payload.Capabilities[key] = make(map[string]interface{})
 		for nestedKey, nestedCap := range cap {
-			payload.Capabilities[key].(map[string]interface{})[nestedKey] = serviceUrl + nestedCap.Path
+			nestedObj, ok := payload.Capabilities[key].(map[string]interface{})
+			if !ok {
+				return nil, fmt.Errorf("failed to cast nested capabilities")
+			}
+			nestedObj[nestedKey] = serviceUrl + nestedCap.Path
 		}
 	}
 	return payload, nil
diff --git a/server/interface.go b/server/interface.go
index 40d33c0..1ed9dc3 100644
--- a/server/interface.go
+++ b/server/interface.go
@@ -97,5 +97,5 @@ type PikePaymentServiceProvider interface {
 		alias, domain string,
 		satoshis uint64,
 		metaData *RequestMetadata,
-	) (*paymail.PikePaymentDestinationsResponse, error)
+	) (*paymail.PikePaymentOutputsResponse, error)
 }
diff --git a/server/mock_test.go b/server/mock_test.go
index f7fd164..c7a604e 100644
--- a/server/mock_test.go
+++ b/server/mock_test.go
@@ -53,6 +53,6 @@ func (m *mockServiceProvider) AddContact(ctx context.Context, requesterPaymail s
 	return nil
 }
 
-func (m *mockServiceProvider) CreatePikeDestinationResponse(ctx context.Context, alias, domain string, satoshis uint64, metaData *RequestMetadata) (*paymail.PikePaymentDestinationsResponse, error) {
+func (m *mockServiceProvider) CreatePikeDestinationResponse(ctx context.Context, alias, domain string, satoshis uint64, metaData *RequestMetadata) (*paymail.PikePaymentOutputsResponse, error) {
 	return nil, nil
 }
diff --git a/server/payment.go b/server/payment.go
index e4580eb..ea9ac63 100644
--- a/server/payment.go
+++ b/server/payment.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 )
 
+// GetPaymailAndCreateMetadata is a helper function to get the paymail from the request, check it in database and create the metadata based on that.
 func (c *Configuration) GetPaymailAndCreateMetadata(context *gin.Context, satoshis uint64) (alias, domain string, md *RequestMetadata, ok bool) {
 	incomingPaymail := context.Param(PaymailAddressParamName)
 
@@ -14,7 +15,8 @@ func (c *Configuration) GetPaymailAndCreateMetadata(context *gin.Context, satosh
 	if len(paymailAddress) == 0 {
 		ErrorResponse(context, ErrorInvalidParameter, "invalid paymail: "+incomingPaymail, http.StatusBadRequest)
 		return
-	} else if !c.IsAllowedDomain(domain) {
+	}
+	if !c.IsAllowedDomain(domain) {
 		ErrorResponse(context, ErrorUnknownDomain, "domain unknown: "+domain, http.StatusBadRequest)
 		return
 	}
@@ -39,7 +41,8 @@ func (c *Configuration) GetPaymailAndCreateMetadata(context *gin.Context, satosh
 	if err != nil {
 		ErrorResponse(context, ErrorFindingPaymail, err.Error(), http.StatusExpectationFailed)
 		return
-	} else if foundPaymail == nil {
+	}
+	if foundPaymail == nil {
 		ErrorResponse(context, ErrorPaymailNotFound, "paymail not found", http.StatusNotFound)
 		return
 	}
diff --git a/server/pike.go b/server/pike.go
index 54f8795..e7f0cec 100644
--- a/server/pike.go
+++ b/server/pike.go
@@ -27,8 +27,11 @@ func (c *Configuration) pikeNewContact(rc *gin.Context) {
 }
 
 func (c *Configuration) pikeGetPaymentDestinations(rc *gin.Context) {
-	var paymentDestinationRequest paymail.PikePaymentDestinationsRequest
+	var paymentDestinationRequest paymail.PikePaymentOutputsPayload
 	err := json.NewDecoder(rc.Request.Body).Decode(&paymentDestinationRequest)
+	defer func() {
+		_ = rc.Request.Body.Close()
+	}()
 	if err != nil {
 		ErrorResponse(rc, ErrorInvalidParameter, err.Error(), http.StatusBadRequest)
 		return
@@ -39,7 +42,7 @@ func (c *Configuration) pikeGetPaymentDestinations(rc *gin.Context) {
 		return
 	}
 
-	var response *paymail.PikePaymentDestinationsResponse
+	var response *paymail.PikePaymentOutputsResponse
 	if response, err = c.pikePaymentActions.CreatePikeDestinationResponse(
 		rc.Request.Context(), alias, domain, paymentDestinationRequest.Amount, md,
 	); err != nil {