diff --git a/src/vcm.c b/src/vcm.c
index 3af0e47..69537de 100644
--- a/src/vcm.c
+++ b/src/vcm.c
@@ -88,14 +88,14 @@ static void vcm_reject(VCM_t* vcm, mc_neighbour_s* neighbour) {
         vcm_rep->vcm.chain->link.buf = malloc(32);
         vcm_rep->vcm.chain->link.size = 32;
         memcpy(vcm_rep->vcm.chain->link.buf, coordination->chain.links[0], 32);
-        vcm->vcm.chain->area = calloc(1, sizeof(struct area));
-        vcm->vcm.chain->area->list.count = 1;
-        vcm->vcm.chain->area->list.size = 1 * sizeof(OCTET_STRING_t*);
-        vcm->vcm.chain->area->list.array = malloc(1 * sizeof(OCTET_STRING_t*));
+        vcm->vcm.chain->area = calloc(1, sizeof(ChainInformationArea_t));
+        vcm->vcm.chain->area->trees.list.count = 1;
+        vcm->vcm.chain->area->trees.list.size = 1 * sizeof(OCTET_STRING_t*);
+        vcm->vcm.chain->area->trees.list.array = malloc(1 * sizeof(OCTET_STRING_t*));
         for (int q = 0; q < 1; ++q) {
-            vcm->vcm.chain->area->list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
-            vcm->vcm.chain->area->list.array[q]->buf = malloc(4);
-            vcm->vcm.chain->area->list.array[q]->size = 4;
+            vcm->vcm.chain->area->trees.list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
+            vcm->vcm.chain->area->trees.list.array[q]->buf = malloc(4);
+            vcm->vcm.chain->area->trees.list.array[q]->size = 4;
         }
     }
 
@@ -340,14 +340,14 @@ static int vcm_check_handle_request(VCM_t* vcm, mc_neighbour_s* neighbour) {
         }
         memcpy(vcm_rep->vcm.chain->link.buf, coordination->chain.links[to_link], 32);
 
-        vcm->vcm.chain->area = calloc(1, sizeof(struct area));
-        vcm->vcm.chain->area->list.count = 1;
-        vcm->vcm.chain->area->list.size = 1 * sizeof(OCTET_STRING_t*);
-        vcm->vcm.chain->area->list.array = malloc(1 * sizeof(OCTET_STRING_t*));
+        vcm->vcm.chain->area = calloc(1, sizeof(ChainInformationArea_t));
+        vcm->vcm.chain->area->trees.list.count = 1;
+        vcm->vcm.chain->area->trees.list.size = 1 * sizeof(OCTET_STRING_t*);
+        vcm->vcm.chain->area->trees.list.array = malloc(1 * sizeof(OCTET_STRING_t*));
         for (int q = 0; q < 1; ++q) {
-            vcm->vcm.chain->area->list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
-            vcm->vcm.chain->area->list.array[q]->buf = malloc(4);
-            vcm->vcm.chain->area->list.array[q]->size = 4;
+            vcm->vcm.chain->area->trees.list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
+            vcm->vcm.chain->area->trees.list.array[q]->buf = malloc(4);
+            vcm->vcm.chain->area->trees.list.array[q]->size = 4;
         }
     }
 
@@ -612,14 +612,14 @@ static int intersection_detected(VCM_t* vcm, mc_neighbour_s* neighbour) {
         vcm_req->vcm.chain->link.buf = malloc(32);
         vcm_req->vcm.chain->link.size = 32;
         memcpy(vcm_req->vcm.chain->link.buf, coordination->chain.links[0], 32);
-        vcm->vcm.chain->area = calloc(1, sizeof(struct area));
-        vcm->vcm.chain->area->list.count = 1;
-        vcm->vcm.chain->area->list.size = 1 * sizeof(OCTET_STRING_t*);
-        vcm->vcm.chain->area->list.array = malloc(1 * sizeof(OCTET_STRING_t*));
+        vcm->vcm.chain->area = calloc(1, sizeof(ChainInformationArea_t));
+        vcm->vcm.chain->area->trees.list.count = 1;
+        vcm->vcm.chain->area->trees.list.size = 1 * sizeof(OCTET_STRING_t*);
+        vcm->vcm.chain->area->trees.list.array = malloc(1 * sizeof(OCTET_STRING_t*));
         for (int q = 0; q < 1; ++q) {
-            vcm->vcm.chain->area->list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
-            vcm->vcm.chain->area->list.array[q]->buf = malloc(4);
-            vcm->vcm.chain->area->list.array[q]->size = 4;
+            vcm->vcm.chain->area->trees.list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
+            vcm->vcm.chain->area->trees.list.array[q]->buf = malloc(4);
+            vcm->vcm.chain->area->trees.list.array[q]->size = 4;
         }
     }
 
@@ -994,14 +994,14 @@ static int mk_vcm(uint8_t* vcm_uper, uint16_t* vcm_uper_len) {
         vcm->vcm.chain->link.buf = malloc(32);
         vcm->vcm.chain->link.size = 32;
         memcpy(vcm->vcm.chain->link.buf, coordination->chain.links[0], 32);
-        vcm->vcm.chain->area = calloc(1, sizeof(struct area));
-        vcm->vcm.chain->area->list.count = 1;
-        vcm->vcm.chain->area->list.size = 1 * sizeof(OCTET_STRING_t*);
-        vcm->vcm.chain->area->list.array = malloc(1 * sizeof(OCTET_STRING_t*));
+        vcm->vcm.chain->area = calloc(1, sizeof(ChainInformationArea_t));
+        vcm->vcm.chain->area->trees.list.count = 1;
+        vcm->vcm.chain->area->trees.list.size = 1 * sizeof(OCTET_STRING_t*);
+        vcm->vcm.chain->area->trees.list.array = malloc(1 * sizeof(OCTET_STRING_t*));
         for (int q = 0; q < 1; ++q) {
-            vcm->vcm.chain->area->list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
-            vcm->vcm.chain->area->list.array[q]->buf = malloc(4);
-            vcm->vcm.chain->area->list.array[q]->size = 4;
+            vcm->vcm.chain->area->trees.list.array[q] = calloc(1, sizeof(OCTET_STRING_t));
+            vcm->vcm.chain->area->trees.list.array[q]->buf = malloc(4);
+            vcm->vcm.chain->area->trees.list.array[q]->size = 4;
         }
     }