fix(blob/service): return error from GetProof if it appears (#3742)

blob/service.go

@@ -235,7 +235,7 @@ func (s *Service) GetProof(
 	}}
 
 	_, proof, err = s.retrieve(ctx, height, namespace, sharesParser)
-	return proof, nil
+	return proof, err
 }
 
 // GetAll returns all blobs under the given namespaces at the given height.

blob/service_test.go

@@ -361,6 +361,19 @@ func TestBlobService_Get(t *testing.T) {
 				assert.NoError(t, err)
 			},
 		},
+		{
+			name: "err during proof request",
+			doFn: func() (interface{}, error) {
+				proof, err := service.GetProof(ctx, 1,
+					blobsWithDiffNamespaces[0].Namespace(),
+					blobsWithDiffNamespaces[1].Commitment,
+				)
+				return proof, err
+			},
+			expectedResult: func(_ interface{}, err error) {
+				require.Error(t, err)
+			},
+		},
 		{
 			name: "marshal proof",
 			doFn: func() (interface{}, error) {