Callbacks service docs updated

api/edge/bff/interface/api/sresponse/callback.go

@@ -0,0 +1,33 @@
+package sresponse
+
+import (
+	"net/http"
+
+	"github.com/tech/sendico/pkg/api/http/response"
+	"github.com/tech/sendico/pkg/mlogger"
+	"github.com/tech/sendico/pkg/model"
+)
+
+type callbackWriteResponse struct {
+	AccessToken            TokenData        `json:"accessToken"`
+	Callbacks              []model.Callback `json:"callbacks"`
+	GeneratedSigningSecret string           `json:"generatedSigningSecret,omitempty"`
+}
+
+func Callback(
+	logger mlogger.Logger,
+	callback *model.Callback,
+	accessToken *TokenData,
+	generatedSecret string,
+	created bool,
+) http.HandlerFunc {
+	resp := callbackWriteResponse{
+		AccessToken:            *accessToken,
+		Callbacks:              []model.Callback{*callback},
+		GeneratedSigningSecret: generatedSecret,
+	}
+	if created {
+		return response.Created(logger, resp)
+	}
+	return response.Ok(logger, resp)
+}