diff --git a/docs/root/source/conf.py b/docs/root/source/conf.py
index 8dc1e0e..c072717 100644
--- a/docs/root/source/conf.py
+++ b/docs/root/source/conf.py
@@ -54,13 +54,13 @@ import sphinx_rtd_theme
 
 extensions = [
     "myst_parser",
+    "sphinx.ext.napoleon",
     "sphinx.ext.autosectionlabel",
     "sphinx.ext.autodoc",
     "sphinx.ext.intersphinx",
     "sphinx.ext.coverage",
     "sphinx.ext.viewcode",
     "sphinx.ext.todo",
-    "sphinx.ext.napoleon",
     "sphinxcontrib.httpdomain",
     "aafigure.sphinxext",
     #'sphinx_toolbox.collapse',
diff --git a/docs/root/source/connecting/http-samples/api-index-response.http b/docs/root/source/connecting/http-samples/api-index-response.http
index 921c30b..fd32de7 100644
--- a/docs/root/source/connecting/http-samples/api-index-response.http
+++ b/docs/root/source/connecting/http-samples/api-index-response.http
@@ -4,7 +4,7 @@ Content-Type: application/json
 {
   "assets": "/assets/",
   "blocks": "/blocks/",
-  "docs": "https://docs.planetmint.io/projects/server/en/v1.3.1/http-client-server-api.html",
+  "docs": "https://docs.planetmint.io/projects/server/en/v1.4.1/http-client-server-api.html",
   "metadata": "/metadata/",
   "outputs": "/outputs/",
   "streamedblocks": "ws://localhost:9985/api/v1/streams/valid_blocks",
diff --git a/docs/root/source/connecting/http-samples/get-block-response.http b/docs/root/source/connecting/http-samples/get-block-response.http
index 200a822..7fe5e73 100644
--- a/docs/root/source/connecting/http-samples/get-block-response.http
+++ b/docs/root/source/connecting/http-samples/get-block-response.http
@@ -7,15 +7,13 @@ Content-Type: application/json
     {
       "assets": [
         {
-          "data": {
-            "msg": "Hello Planetmint!"
-          }
+          "data": "QmQP5C3PmhH9oB84n7YqSY4WVqmYatdoo1BdwhH4zmcwqM"
         }
       ],
-      "id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac",
+      "id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530",
       "inputs": [
         {
-          "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUCWcUaLa2U-nkmZ6oYj14aeV6B4TJH2NvZ8k2ZTwcGiaiCGXDQT2dEPfMCFwM8lwSousafCu4c7EgVZ1GzUDjsN",
+          "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUDklzRb5aUQz9slbaqSWap1AfC-cacTCN3CGtFy2LPK7JKEqKG2b0KQXnUcFksk_KH_v6ImFXHsclKSp1OJkIEI",
           "fulfills": null,
           "owners_before": [
             "4K9sWUMFwTgaDGPfdynrbxWqWS6sWmKbZoTjxLtVUibD"
@@ -39,7 +37,7 @@ Content-Type: application/json
           ]
         }
       ],
-      "version": "2.0"
+      "version": "3.0"
     }
   ]
 }
diff --git a/docs/root/source/connecting/http-samples/get-block-txid-request.http b/docs/root/source/connecting/http-samples/get-block-txid-request.http
index b3e8bd3..99dba30 100644
--- a/docs/root/source/connecting/http-samples/get-block-txid-request.http
+++ b/docs/root/source/connecting/http-samples/get-block-txid-request.http
@@ -1,3 +1,3 @@
-GET /api/v1/blocks?transaction_id=61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac HTTP/1.1
+GET /api/v1/blocks?transaction_id=0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530 HTTP/1.1
 Host: example.com
 
diff --git a/docs/root/source/connecting/http-samples/get-tx-by-asset-request.http b/docs/root/source/connecting/http-samples/get-tx-by-asset-request.http
index 560bcbc..4fcbd0b 100644
--- a/docs/root/source/connecting/http-samples/get-tx-by-asset-request.http
+++ b/docs/root/source/connecting/http-samples/get-tx-by-asset-request.http
@@ -1,3 +1,3 @@
-GET /api/v1/transactions?operation=TRANSFER&asset_id=61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac HTTP/1.1
+GET /api/v1/transactions?operation=TRANSFER&asset_id=0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530 HTTP/1.1
 Host: example.com
 
diff --git a/docs/root/source/connecting/http-samples/get-tx-by-asset-response.http b/docs/root/source/connecting/http-samples/get-tx-by-asset-response.http
index aac836b..9664858 100644
--- a/docs/root/source/connecting/http-samples/get-tx-by-asset-response.http
+++ b/docs/root/source/connecting/http-samples/get-tx-by-asset-response.http
@@ -4,16 +4,16 @@ Content-Type: application/json
 [{
   "assets": [
     {
-      "id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac"
+      "id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530"
     }
   ],
-  "id": "b6e1ab3d48bbbbb0e40b952e70ec5d439b2745e0ba0c44b4ee877657e9ac33f0",
+  "id": "8d11fe2bd91c4747a41e0c3dbe1400c511175be42f008d6cff92cbfa9e04f799",
   "inputs": [
     {
-      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUA4BB4fxDXK3CQTbKpH5gTAN76NG-iopNuuDEfBbZ1Fl-ipNU46t8VCvK9ghm9Q53aFRW6DDiW5wcWXxY0sS4EJ",
+      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUCh-rpO-xqDm2fngjzxnKc39G16FpFMo0y50sHT7_uo1Itzvh4jsxnSGco2HjG6ZF-lSiGsASZ4uIIHuPM57yUI",
       "fulfills": {
         "output_index": 0,
-        "transaction_id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac"
+        "transaction_id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530"
       },
       "owners_before": [
         "4K9sWUMFwTgaDGPfdynrbxWqWS6sWmKbZoTjxLtVUibD"
@@ -37,21 +37,21 @@ Content-Type: application/json
       ]
     }
   ],
-  "version": "2.0"
+  "version": "3.0"
 },
 {
   "assets": [
     {
-      "id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac"
+      "id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530"
     }
   ],
-  "id": "e43d3f93d90d22ef11c21607e3415bfcda4e0c7dd60412fbb55daf32978a3126",
+  "id": "45c929b66d1b10db6c3c3e6b1adddc0778b473fced4a1f403c2646b25f3fd983",
   "inputs": [
     {
-      "fulfillment": "pGSAICw7Ul-c2lG6NFbHp3FbKRC7fivQcNGO7GS4wV3A-1QggUBjj_XTjB3yJdG8JMNKnkkHvcX_BTOkl-YacRD4yKqxUCeL-VTgbrLgi5a3gGxNJcTkZP1gF0nsby8cgV4xmOcB",
+      "fulfillment": "pGSAICw7Ul-c2lG6NFbHp3FbKRC7fivQcNGO7GS4wV3A-1QggUAc6OAQcXppDxCazw0UK2nwghctKNiZYDDsSOkAn0eQE8QjZ7GLzJpVb92oGXw_4FF7cLE0gg3nNxu7taQ8xakE",
       "fulfills": {
         "output_index": 0,
-        "transaction_id": "b6e1ab3d48bbbbb0e40b952e70ec5d439b2745e0ba0c44b4ee877657e9ac33f0"
+        "transaction_id": "8d11fe2bd91c4747a41e0c3dbe1400c511175be42f008d6cff92cbfa9e04f799"
       },
       "owners_before": [
         "3yfQPHeWAa1MxTX9Zf9176QqcpcnWcanVZZbaHb8B3h9"
@@ -75,5 +75,5 @@ Content-Type: application/json
       ]
     }
   ],
-  "version": "2.0"
+  "version": "3.0"
 }]
diff --git a/docs/root/source/connecting/http-samples/get-tx-id-request.http b/docs/root/source/connecting/http-samples/get-tx-id-request.http
index 1574cdd..1c397c5 100644
--- a/docs/root/source/connecting/http-samples/get-tx-id-request.http
+++ b/docs/root/source/connecting/http-samples/get-tx-id-request.http
@@ -1,3 +1,3 @@
-GET /api/v1/transactions/61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac HTTP/1.1
+GET /api/v1/transactions/0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530 HTTP/1.1
 Host: example.com
 
diff --git a/docs/root/source/connecting/http-samples/get-tx-id-response.http b/docs/root/source/connecting/http-samples/get-tx-id-response.http
index e4299ee..0183c41 100644
--- a/docs/root/source/connecting/http-samples/get-tx-id-response.http
+++ b/docs/root/source/connecting/http-samples/get-tx-id-response.http
@@ -4,15 +4,13 @@ Content-Type: application/json
 {
   "assets": [
     {
-      "data": {
-        "msg": "Hello Planetmint!"
-      }
+      "data": "QmQP5C3PmhH9oB84n7YqSY4WVqmYatdoo1BdwhH4zmcwqM"
     }
   ],
-  "id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac",
+  "id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530",
   "inputs": [
     {
-      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUCWcUaLa2U-nkmZ6oYj14aeV6B4TJH2NvZ8k2ZTwcGiaiCGXDQT2dEPfMCFwM8lwSousafCu4c7EgVZ1GzUDjsN",
+      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUDklzRb5aUQz9slbaqSWap1AfC-cacTCN3CGtFy2LPK7JKEqKG2b0KQXnUcFksk_KH_v6ImFXHsclKSp1OJkIEI",
       "fulfills": null,
       "owners_before": [
         "4K9sWUMFwTgaDGPfdynrbxWqWS6sWmKbZoTjxLtVUibD"
@@ -36,5 +34,5 @@ Content-Type: application/json
       ]
     }
   ],
-  "version": "2.0"
+  "version": "3.0"
 }
diff --git a/docs/root/source/connecting/http-samples/index-response.http b/docs/root/source/connecting/http-samples/index-response.http
index 67cf70c..4433e63 100644
--- a/docs/root/source/connecting/http-samples/index-response.http
+++ b/docs/root/source/connecting/http-samples/index-response.http
@@ -6,7 +6,7 @@ Content-Type: application/json
     "v1": {
       "assets": "/api/v1/assets/",
       "blocks": "/api/v1/blocks/",
-      "docs": "https://docs.planetmint.io/projects/server/en/v1.2.2/http-client-server-api.html",
+      "docs": "https://docs.planetmint.io/projects/server/en/v1.4.1/http-client-server-api.html",
       "metadata": "/api/v1/metadata/",
       "outputs": "/api/v1/outputs/",
       "streamedblocks": "ws://localhost:9985/api/v1/streams/valid_blocks",
@@ -15,7 +15,7 @@ Content-Type: application/json
       "validators": "/api/v1/validators"
     }
   },
-  "docs": "https://docs.planetmint.io/projects/server/en/v1.2.2/",
+  "docs": "https://docs.planetmint.io/projects/server/en/v1.4.1/",
   "software": "Planetmint",
-  "version": "1.3.1"
+  "version": "1.4.1"
 }
diff --git a/docs/root/source/connecting/http-samples/post-tx-request.http b/docs/root/source/connecting/http-samples/post-tx-request.http
index 90868ee..7cf9015 100644
--- a/docs/root/source/connecting/http-samples/post-tx-request.http
+++ b/docs/root/source/connecting/http-samples/post-tx-request.http
@@ -5,15 +5,13 @@ Content-Type: application/json
 {
   "assets": [
     {
-      "data": {
-        "msg": "Hello Planetmint!"
-      }
+      "data": "QmQP5C3PmhH9oB84n7YqSY4WVqmYatdoo1BdwhH4zmcwqM"
     }
   ],
-  "id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac",
+  "id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530",
   "inputs": [
     {
-      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUCWcUaLa2U-nkmZ6oYj14aeV6B4TJH2NvZ8k2ZTwcGiaiCGXDQT2dEPfMCFwM8lwSousafCu4c7EgVZ1GzUDjsN",
+      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUDklzRb5aUQz9slbaqSWap1AfC-cacTCN3CGtFy2LPK7JKEqKG2b0KQXnUcFksk_KH_v6ImFXHsclKSp1OJkIEI",
       "fulfills": null,
       "owners_before": [
         "4K9sWUMFwTgaDGPfdynrbxWqWS6sWmKbZoTjxLtVUibD"
@@ -37,5 +35,5 @@ Content-Type: application/json
       ]
     }
   ],
-  "version": "2.0"
+  "version": "3.0"
 }
diff --git a/docs/root/source/connecting/http-samples/post-tx-response.http b/docs/root/source/connecting/http-samples/post-tx-response.http
index 6404a2b..df0857b 100644
--- a/docs/root/source/connecting/http-samples/post-tx-response.http
+++ b/docs/root/source/connecting/http-samples/post-tx-response.http
@@ -4,15 +4,13 @@ Content-Type: application/json
 {
   "assets": [
     {
-      "data": {
-        "msg": "Hello Planetmint!"
-      }
+      "data": "QmQP5C3PmhH9oB84n7YqSY4WVqmYatdoo1BdwhH4zmcwqM"
     }
   ],
-  "id": "61e1312b80705e0dabb948c9d78dae7f62d64832abda822b13d89c4a7305d4ac",
+  "id": "0fdeb547670bbea980389df53cf5a91e60159339084c6b0b5cc0b5494a679530",
   "inputs": [
     {
-      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUCWcUaLa2U-nkmZ6oYj14aeV6B4TJH2NvZ8k2ZTwcGiaiCGXDQT2dEPfMCFwM8lwSousafCu4c7EgVZ1GzUDjsN",
+      "fulfillment": "pGSAIDE5i63cn4X8T8N1sZ2mGkJD5lNRnBM4PZgI_zvzbr-cgUDklzRb5aUQz9slbaqSWap1AfC-cacTCN3CGtFy2LPK7JKEqKG2b0KQXnUcFksk_KH_v6ImFXHsclKSp1OJkIEI",
       "fulfills": null,
       "owners_before": [
         "4K9sWUMFwTgaDGPfdynrbxWqWS6sWmKbZoTjxLtVUibD"
@@ -36,5 +34,5 @@ Content-Type: application/json
       ]
     }
   ],
-  "version": "2.0"
+  "version": "3.0"
 }
diff --git a/planetmint/backend/connection.py b/planetmint/backend/connection.py
index 3080d0b..ba63a8f 100644
--- a/planetmint/backend/connection.py
+++ b/planetmint/backend/connection.py
@@ -3,14 +3,12 @@
 # SPDX-License-Identifier: (Apache-2.0 AND CC-BY-4.0)
 # Code is Apache-2.0 and docs are CC-BY-4.0
 
-import tarantool
 import logging
 
 from itertools import repeat
 from importlib import import_module
 from transactions.common.exceptions import ConfigurationError
 from planetmint.config import Config
-from planetmint.backend.exceptions import ConnectionError
 
 BACKENDS = {
     "tarantool_db": "planetmint.backend.tarantool.connection.TarantoolDBConnection",
@@ -69,6 +67,7 @@ class DBConnection(metaclass=DBSingleton):
         **kwargs
     ):
         """Create a new :class:`~.Connection` instance.
+
         Args:
             host (str): the host to connect to.
             port (int): the port to connect to.
diff --git a/planetmint/backend/query.py b/planetmint/backend/query.py
index 3ed074f..f2be158 100644
--- a/planetmint/backend/query.py
+++ b/planetmint/backend/query.py
@@ -27,12 +27,12 @@ def store_asset(asset: dict, connection):
 @singledispatch
 def store_assets(assets: list, connection):
     """Write a list of assets to the assets table.
-    backend
-        Args:
-            assets (list): a list of assets to write.
 
-        Returns:
-            The database response.
+    Args:
+        assets (list): a list of assets to write.
+
+    Returns:
+        The database response.
     """
 
     raise NotImplementedError
@@ -193,6 +193,7 @@ def get_metadata(connection, transaction_ids):
 @singledispatch
 def get_assets(connection, asset_ids) -> list:
     """Get a list of assets from the assets table.
+
     Args:
         asset_ids (list): a list of ids for the assets to be retrieved from
         the database.