dev@locazia: some fixes

app/api/routes/_blockchain.py

@@ -102,7 +102,7 @@ async def s_api_v1_blockchain_send_new_content_message(request):
                     'payload': b64encode(
                         begin_cell()
                             .store_uint(0x5491d08c, 32)
-                            .store_uint(int(encrypted_content_cid.content_hash.hex()[2:], 16), 256)
+                            .store_uint(int.from_bytes(encrypted_content_cid.content_hash, "big", signed=False), 256)
                             .store_ref(
                                 begin_cell()
                                     .store_ref(