Update Arweave use case

examples/use_case_arweave.ipynb

@@ -73,7 +73,9 @@
    "source": [
     "# check if example_data.csv file exists in the same folder, this demo will start to load this csv file.\n",
     "\n",
-    "# check if arweave_wallet.json file exists in the same folder, this demo needs to use arweave wallet to sign to send tx."
+    "# We use everpay to pay for the transaction fee. You can connect to everpay either by your eth wallet or by arweave wallet.\n",
+    "# If you choose arweave wallet, check if arweave_wallet.json file exists in the same folder.\n",
+    "# Make sure you have some balance in your everpay account."
    ]
   },
   {
@@ -83,7 +85,7 @@
    "source": [
     "## Step 2. Local CSV -> MindLake\n",
     "- Load data from a local CSV file without the metadata file, by defining each column manually.\n",
-    "- You can also load from a local backup into MindLake once you are familar, then no need to define each column. "
+    "- You can also load from a local backup into MindLake without the need to define each column. "
    ]
   },
   {
@@ -289,7 +291,7 @@
    "metadata": {},
    "source": [
     "## Step 3. MindLake -> Arweave\n",
-    "- Load data from a table in MindLake and save to Arweave"
+    "- Load data from a table in MindLake"
    ]
   },
   {
@@ -402,7 +404,6 @@
     }
    ],
    "source": [
-    "# make sure you have arweave_wallet.json \n",
     "result = dataPack2.saveToArweave('test_table_encrypted.csv', 'ACNH')\n",
     "# result = dataPack2.saveToArweave('test_table_encrypted.csv', 'AR', './arweave_wallet.json')\n",
     "assert result, result.message\n",
@@ -425,7 +426,7 @@
    "metadata": {},
    "source": [
     "## Step 4. Arweave -> Local File\n",
-    "- Load data from Arweave and save to local file"
+    "- Load data from Arweave"
    ]
   },
   {