Added BlobProof response type (#313)

* Added BlobProof response type

* Linter fix

* Changed BlobProof.Nodes field type to [][]byte

cmd/api/handler/namespace.go

@@ -804,5 +804,5 @@ func (handler *NamespaceHandler) BlobProofs(c echo.Context) error {
 		return handleError(c, err, handler.namespace)
 	}
 
-	return c.JSON(http.StatusOK, proofs.ShareProofs)
+	return c.JSON(http.StatusOK, responses.NewProofs(proofs.ShareProofs))
 }

cmd/api/handler/responses/blobProof.go

@@ -0,0 +1,26 @@
+// SPDX-FileCopyrightText: 2024 PK Lab AG <[email protected]>
+// SPDX-License-Identifier: MIT
+
+package responses
+
+import (
+	"github.com/celestiaorg/celestia-app/v3/pkg/proof"
+)
+
+type BlobProof struct {
+	Start int32    `example:"0"  format:"integer" json:"start" swaggertype:"integer"`
+	End   int32    `example:"16" format:"integer" json:"end"   swaggertype:"integer"`
+	Nodes [][]byte `json:"nodes"`
+}
+
+func NewProofs(proofs []*proof.NMTProof) []BlobProof {
+	result := make([]BlobProof, len(proofs))
+	for i := range proofs {
+		result[i] = BlobProof{
+			Start: proofs[i].Start,
+			End:   proofs[i].End,
+			Nodes: proofs[i].Nodes,
+		}
+	}
+	return result
+}