diff --git a/apps/block_scout_web/assets/css/theme/_base_variables.scss b/apps/block_scout_web/assets/css/theme/_base_variables.scss
index c24e66b96d..0f1188b319 100644
--- a/apps/block_scout_web/assets/css/theme/_base_variables.scss
+++ b/apps/block_scout_web/assets/css/theme/_base_variables.scss
@@ -215,6 +215,12 @@ $container-max-widths: (
 
 @include _assert-ascending($container-max-widths, "$container-max-widths");
 
+@media (min-width: 1200px) { 
+  .container {
+    max-width: 1180px !important;
+  }
+ }
+
 // Grid columns
 //
 // Set the number of columns and specify the width of the gutters.
diff --git a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
index 5c7b5c9127..77b9399e1f 100644
--- a/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
+++ b/apps/block_scout_web/assets/js/lib/smart_contract/functions.js
@@ -1,4 +1,5 @@
 import $ from 'jquery'
+import ethNetProps from 'eth-net-props'
 import { walletEnabled, getCurrentAccount } from './write.js'
 import { openErrorModal, openWarningModal, openSuccessModal } from '../modals.js'
 
@@ -49,7 +50,8 @@ const readWriteFunction = (element) => {
       }
 
       $.get(url, data, response => $responseContainer.html(response))
-    } else {
+    } else if (action === 'write') {
+      const chainId = $form.data('chainId')
       walletEnabled()
         .then((isWalletEnabled) => {
           if (isWalletEnabled) {
@@ -63,13 +65,22 @@ const readWriteFunction = (element) => {
             const contractAddress = $form.data('contract-address')
             const contractAbi = $form.data('contract-abi')
 
-            getCurrentAccount()
+            window.web3.eth.getChainId()
+              .then(chainIdFromWallet => {
+                if (chainId !== chainIdFromWallet) {
+                  const networkDisplayNameFromWallet = ethNetProps.props.getNetworkDisplayName(chainIdFromWallet)
+                  const networkDisplayName = ethNetProps.props.getNetworkDisplayName(chainId)
+                  return Promise.reject(new Error(`You connected to ${networkDisplayNameFromWallet} chain in the wallet, but the current instance of Blockscout is for ${networkDisplayName} chain`))
+                } else {
+                  return getCurrentAccount()
+                }
+              })
               .then(currentAccount => {
                 const TargetContract = new window.web3.eth.Contract(contractAbi, contractAddress)
 
                 TargetContract.methods[functionName](...args).send({ from: currentAccount })
                   .on('error', function (error) {
-                    openErrorModal(`Error in sending transaction for method "${functionName}"`, error, false)
+                    openErrorModal(`Error in sending transaction for method "${functionName}"`, formatError(error), false)
                   })
                   .on('transactionHash', function (txHash) {
                     const getTxReceipt = (txHash) => {
@@ -84,14 +95,23 @@ const readWriteFunction = (element) => {
                     const txReceiptPollingIntervalId = setInterval(() => { getTxReceipt(txHash) }, 5 * 1000)
                   })
               })
+              .catch(error => {
+                openWarningModal('Unauthorized', formatError(error))
+              })
           } else {
-            openWarningModal('Unauthorized', 'You haven\'t approved the reading of account list from your MetaMask/Nifty wallet or MetaMask/Nifty wallet is not installed.')
+            openWarningModal('Unauthorized', 'You haven\'t approved the reading of account list from your MetaMask or MetaMask/Nifty wallet is locked or is not installed.')
           }
         })
     }
   })
 }
 
+const formatError = (error) => {
+  let { message } = error
+  message = message && message.split('Error: ').length > 1 ? message.split('Error: ')[1] : message
+  return message
+}
+
 const container = $('[data-smart-contract-functions]')
 
 if (container.length) {
diff --git a/apps/block_scout_web/assets/package-lock.json b/apps/block_scout_web/assets/package-lock.json
index c4ebf3ceb8..f7e09418ae 100644
--- a/apps/block_scout_web/assets/package-lock.json
+++ b/apps/block_scout_web/assets/package-lock.json
@@ -2336,6 +2336,11 @@
       "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
       "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU="
     },
+    "assertion-error": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw=="
+    },
     "assign-symbols": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/assign-symbols/-/assign-symbols-1.0.0.tgz",
@@ -3095,6 +3100,19 @@
       "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
       "integrity": "sha1-G2gcIf+EAzyCZUMJBolCDRhxUdw="
     },
+    "chai": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/chai/-/chai-4.2.0.tgz",
+      "integrity": "sha512-XQU3bhBukrOsQCuwZndwGcCVQHyZi53fQ6Ys1Fym7E4olpIqqZZhhoFJoaKVvV17lWQoXYwgWN2nF5crA8J2jw==",
+      "requires": {
+        "assertion-error": "^1.1.0",
+        "check-error": "^1.0.2",
+        "deep-eql": "^3.0.1",
+        "get-func-name": "^2.0.0",
+        "pathval": "^1.1.0",
+        "type-detect": "^4.0.5"
+      }
+    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -3138,6 +3156,11 @@
         "color-name": "^1.0.0"
       }
     },
+    "check-error": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/check-error/-/check-error-1.0.2.tgz",
+      "integrity": "sha1-V00xLt2Iu13YkS6Sht1sCu1KrII="
+    },
     "chokidar": {
       "version": "2.1.8",
       "resolved": "https://registry.npmjs.org/chokidar/-/chokidar-2.1.8.tgz",
@@ -4309,6 +4332,14 @@
         "mimic-response": "^1.0.0"
       }
     },
+    "deep-eql": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/deep-eql/-/deep-eql-3.0.1.tgz",
+      "integrity": "sha512-+QeIQyN5ZuO+3Uk5DYh6/1eKO0m0YmJFGNmFHGACpf1ClL1nmlV/p4gNgbl2pJGxgXb4faqo6UE+M5ACEMyVcw==",
+      "requires": {
+        "type-detect": "^4.0.0"
+      }
+    },
     "deep-is": {
       "version": "0.1.3",
       "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
@@ -5141,6 +5172,14 @@
         }
       }
     },
+    "eth-net-props": {
+      "version": "1.0.33",
+      "resolved": "https://registry.npmjs.org/eth-net-props/-/eth-net-props-1.0.33.tgz",
+      "integrity": "sha512-RoqoXkY3+ztjdD9EfbjnMapWqfRjUscPon4Vjt48RLHDDYyNmz7LiQ4Qgb4E41PNS7xRoGkQCWJvJRAI9vDsFQ==",
+      "requires": {
+        "chai": "^4.2.0"
+      }
+    },
     "ethereum-bloom-filters": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/ethereum-bloom-filters/-/ethereum-bloom-filters-1.0.7.tgz",
@@ -5998,6 +6037,11 @@
       "integrity": "sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==",
       "dev": true
     },
+    "get-func-name": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/get-func-name/-/get-func-name-2.0.0.tgz",
+      "integrity": "sha1-6td0q+5y4gQJQzoGY2YCPdaIekE="
+    },
     "get-stdin": {
       "version": "4.0.1",
       "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-4.0.1.tgz",
@@ -10252,6 +10296,11 @@
         }
       }
     },
+    "pathval": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/pathval/-/pathval-1.1.0.tgz",
+      "integrity": "sha1-uULm1L3mUwBe9rcTYd74cn0GReA="
+    },
     "pbkdf2": {
       "version": "3.0.17",
       "resolved": "https://registry.npmjs.org/pbkdf2/-/pbkdf2-3.0.17.tgz",
@@ -14330,8 +14379,7 @@
     "type-detect": {
       "version": "4.0.8",
       "resolved": "https://registry.npmjs.org/type-detect/-/type-detect-4.0.8.tgz",
-      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g==",
-      "dev": true
+      "integrity": "sha512-0fr/mIH1dlO+x7TlcMy+bIDqKPsw/70tVyeHW787goQjhmqaZe10uwLujubK9q9Lg6Fiho1KUKDYz0Z7k7g5/g=="
     },
     "type-fest": {
       "version": "0.8.1",
diff --git a/apps/block_scout_web/assets/package.json b/apps/block_scout_web/assets/package.json
index b5692f344c..47b990f54b 100644
--- a/apps/block_scout_web/assets/package.json
+++ b/apps/block_scout_web/assets/package.json
@@ -25,6 +25,7 @@
     "bootstrap": "^4.3.1",
     "chart.js": "^2.9.3",
     "clipboard": "^2.0.4",
+    "eth-net-props": "^1.0.33",
     "highlight.js": "^9.16.2",
     "highlightjs-solidity": "^1.0.8",
     "humps": "^2.0.1",
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
index f5232c6e36..907bb57997 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/smart_contract/_functions.html.eex
@@ -15,7 +15,7 @@
             render BlockScoutWeb.CommonComponentsView, "_modal_status.html", status: status
           end
         %>
-        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>">
+        <form class="form-inline" data-function-form data-action="<%= if writeable?(function), do: :write, else: :read %>" data-url="<%= smart_contract_path(@conn, :show, @address.hash) %>" data-contract-address="<%= @address.hash %>" data-contract-abi="<%= Poison.encode!(@address.smart_contract.abi) %>" data-chain-id="<%= Explorer.Chain.Cache.NetVersion.get_version() %>">
           <input type="hidden" name="function_name" value='<%= function["name"] %>' />
 
           <%= if queryable?(function["inputs"]) do %>