diff --git a/bindings/nodejs/examples/client/04-get-output.ts b/bindings/nodejs/examples/client/04-get-output.ts
index 38e26d6b8c..f2d47434d2 100644
--- a/bindings/nodejs/examples/client/04-get-output.ts
+++ b/bindings/nodejs/examples/client/04-get-output.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will get output from a known outputId.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
     try {
diff --git a/bindings/nodejs/examples/client/05-get-address-balance.ts b/bindings/nodejs/examples/client/05-get-address-balance.ts
index 9f8491b8cb..ebf47bd31d 100644
--- a/bindings/nodejs/examples/client/05-get-address-balance.ts
+++ b/bindings/nodejs/examples/client/05-get-address-balance.ts
@@ -11,21 +11,20 @@ require('dotenv').config({ path: '.env' });
 // conditions and sum the amounts and native tokens.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL', 'MNEMONIC']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
-        }
         const secretManager = new SecretManager({
-            mnemonic: process.env.MNEMONIC,
+            mnemonic: process.env.MNEMONIC as string,
         });
 
         // Generate the first address
diff --git a/bindings/nodejs/examples/client/06-simple-block.ts b/bindings/nodejs/examples/client/06-simple-block.ts
index 423e850a6f..dcd26aca7b 100644
--- a/bindings/nodejs/examples/client/06-simple-block.ts
+++ b/bindings/nodejs/examples/client/06-simple-block.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will send a block without a payload.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL', 'EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
diff --git a/bindings/nodejs/examples/client/07-get-block-data.ts b/bindings/nodejs/examples/client/07-get-block-data.ts
index 7a5750937a..f8a45ec4ec 100644
--- a/bindings/nodejs/examples/client/07-get-block-data.ts
+++ b/bindings/nodejs/examples/client/07-get-block-data.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will send a block and get the data and metadata for it.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
diff --git a/bindings/nodejs/examples/client/08-data-block.ts b/bindings/nodejs/examples/client/08-data-block.ts
index 1d46d0da03..c7a84b46d0 100644
--- a/bindings/nodejs/examples/client/08-data-block.ts
+++ b/bindings/nodejs/examples/client/08-data-block.ts
@@ -17,13 +17,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will send a block with a tagged data payload.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL', 'EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     const options = {
diff --git a/bindings/nodejs/examples/client/09-transaction.ts b/bindings/nodejs/examples/client/09-transaction.ts
index a205341003..636d767a3f 100644
--- a/bindings/nodejs/examples/client/09-transaction.ts
+++ b/bindings/nodejs/examples/client/09-transaction.ts
@@ -10,25 +10,23 @@ require('dotenv').config({ path: '.env' });
 // In this example we will send a transaction.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL', 'MNEMONIC', 'EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
     try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
-        }
-
         // Configure your own mnemonic in ".env". Since the output amount cannot be zero, the mnemonic must contain non-zero
         // balance
         const secretManager = {
-            mnemonic: process.env.MNEMONIC,
+            mnemonic: process.env.MNEMONIC as string,
         };
 
         // We generate an address from our own mnemonic so that we send the funds to ourselves
diff --git a/bindings/nodejs/examples/client/10-mqtt.ts b/bindings/nodejs/examples/client/10-mqtt.ts
index 41c4e5ba55..77b095a02e 100644
--- a/bindings/nodejs/examples/client/10-mqtt.ts
+++ b/bindings/nodejs/examples/client/10-mqtt.ts
@@ -18,14 +18,16 @@ require('dotenv').config({ path: '.env' });
 // In this example we will listen to MQTT topics and print the block and milestone payloads.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     // Connecting to a MQTT broker using raw ip doesn't work with TCP. This is a limitation of rustls.
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     // Array of topics to subscribe to
diff --git a/bindings/nodejs/examples/client/11-build-output.ts b/bindings/nodejs/examples/client/11-build-output.ts
index 882652d55f..8dbdd1f18e 100644
--- a/bindings/nodejs/examples/client/11-build-output.ts
+++ b/bindings/nodejs/examples/client/11-build-output.ts
@@ -24,13 +24,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will build a basic output with various options.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
diff --git a/bindings/nodejs/examples/client/12-get-raw-block.ts b/bindings/nodejs/examples/client/12-get-raw-block.ts
index 4f765a69f3..b461ff1d4c 100644
--- a/bindings/nodejs/examples/client/12-get-raw-block.ts
+++ b/bindings/nodejs/examples/client/12-get-raw-block.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will get the raw bytes of a block.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
diff --git a/bindings/nodejs/examples/client/13-build-alias-output.ts b/bindings/nodejs/examples/client/13-build-alias-output.ts
index b7585044d3..27fb2db0e6 100644
--- a/bindings/nodejs/examples/client/13-build-alias-output.ts
+++ b/bindings/nodejs/examples/client/13-build-alias-output.ts
@@ -21,13 +21,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will build an alias output.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
diff --git a/bindings/nodejs/examples/client/14-build-foundry-output.ts b/bindings/nodejs/examples/client/14-build-foundry-output.ts
index a6e58ac134..0665ee6638 100644
--- a/bindings/nodejs/examples/client/14-build-foundry-output.ts
+++ b/bindings/nodejs/examples/client/14-build-foundry-output.ts
@@ -16,20 +16,18 @@ require('dotenv').config({ path: '.env' });
 // In this example we will build a foundry output.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL', 'MNEMONIC']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
-        }
-
         const aliasId =
             '0xff311f59790ccb85343a36fbac2f06d233734794404142b308c13f2c616935b5';
 
diff --git a/bindings/nodejs/examples/client/15-build-nft-output.ts b/bindings/nodejs/examples/client/15-build-nft-output.ts
index 161ce1f9d1..c484c7caed 100644
--- a/bindings/nodejs/examples/client/15-build-nft-output.ts
+++ b/bindings/nodejs/examples/client/15-build-nft-output.ts
@@ -22,13 +22,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will build an NFT output.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
diff --git a/bindings/nodejs/examples/client/16-custom-plugin.ts b/bindings/nodejs/examples/client/16-custom-plugin.ts
index ecf441d9c8..e92ab1b02f 100644
--- a/bindings/nodejs/examples/client/16-custom-plugin.ts
+++ b/bindings/nodejs/examples/client/16-custom-plugin.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will get output from a known nft by calling the node endpoint using a "custom plugin" call.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
diff --git a/bindings/nodejs/examples/client/offline_signing/00-address-generation.ts b/bindings/nodejs/examples/client/offline_signing/00-address-generation.ts
index 0c13301186..275e7efc61 100644
--- a/bindings/nodejs/examples/client/offline_signing/00-address-generation.ts
+++ b/bindings/nodejs/examples/client/offline_signing/00-address-generation.ts
@@ -19,14 +19,15 @@ const ADDRESS_FILE_NAME = 'offline-signing-address.json';
 // In this example we will generate an address offline which will be used later to find inputs.
 async function run() {
     initLogger();
-
-    try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
+    for (const envVar of ['MNEMONIC']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
+    try {
         const secretManager = new SecretManager({
-            mnemonic: process.env.MNEMONIC,
+            mnemonic: process.env.MNEMONIC as string,
         });
 
         // Generates an address offline.
diff --git a/bindings/nodejs/examples/client/offline_signing/01-transaction-preparation.ts b/bindings/nodejs/examples/client/offline_signing/01-transaction-preparation.ts
index fd01cdc3b7..150e00375e 100644
--- a/bindings/nodejs/examples/client/offline_signing/01-transaction-preparation.ts
+++ b/bindings/nodejs/examples/client/offline_signing/01-transaction-preparation.ts
@@ -16,13 +16,15 @@ const PREPARED_TRANSACTION_FILE_NAME =
 // In this example we will get inputs and prepare a transaction
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const onlineClient = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
diff --git a/bindings/nodejs/examples/client/offline_signing/02-transaction-signing.ts b/bindings/nodejs/examples/client/offline_signing/02-transaction-signing.ts
index 66bd8fd172..0c338cbe7d 100644
--- a/bindings/nodejs/examples/client/offline_signing/02-transaction-signing.ts
+++ b/bindings/nodejs/examples/client/offline_signing/02-transaction-signing.ts
@@ -16,16 +16,17 @@ const SIGNED_TRANSACTION_FILE_NAME = 'offline-signing-signed-transaction.json';
 // In this example we will sign the prepared transaction.
 async function run() {
     initLogger();
+    for (const envVar of ['MNEMONIC']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
 
     const offlineClient = new Client({});
 
     try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
-        }
-
         const secretManager = {
-            mnemonic: process.env.MNEMONIC,
+            mnemonic: process.env.MNEMONIC as string,
         };
 
         // Read in prepared transaction from example 2_transaction_preparation
diff --git a/bindings/nodejs/examples/client/offline_signing/03-send-block.ts b/bindings/nodejs/examples/client/offline_signing/03-send-block.ts
index e3410eff63..a6d52660cd 100644
--- a/bindings/nodejs/examples/client/offline_signing/03-send-block.ts
+++ b/bindings/nodejs/examples/client/offline_signing/03-send-block.ts
@@ -14,12 +14,14 @@ const SIGNED_TRANSACTION_FILE_NAME = 'offline-signing-signed-transaction.json';
 // In this example we will send the signed transaction in a block.
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL', 'EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     const onlineClient = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
diff --git a/bindings/nodejs/examples/evm/send-evm-transaction.ts b/bindings/nodejs/examples/evm/send-evm-transaction.ts
index ccc7450819..32e7b011c2 100644
--- a/bindings/nodejs/examples/evm/send-evm-transaction.ts
+++ b/bindings/nodejs/examples/evm/send-evm-transaction.ts
@@ -37,12 +37,14 @@ const TX_OPTIONS = {
 
 async function run(): Promise<void> {
     const provider = new Web3(RPC_ENDPOINT);
-    try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
+    for (const envVar of ['MNEMONIC']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
+    try {
         const mnemonicSecretManager = {
-            mnemonic: process.env.MNEMONIC,
+            mnemonic: process.env.MNEMONIC as string,
         };
 
         const secretManager = new SecretManager(mnemonicSecretManager);
diff --git a/bindings/nodejs/examples/exchange/3-check-balance.ts b/bindings/nodejs/examples/exchange/3-check-balance.ts
index ba3deb9ad8..797346b58d 100644
--- a/bindings/nodejs/examples/exchange/3-check-balance.ts
+++ b/bindings/nodejs/examples/exchange/3-check-balance.ts
@@ -12,10 +12,12 @@ require('dotenv').config({ path: '.env' });
 
 async function run() {
     try {
-        if (!process.env.WALLET_DB_PATH) {
-            throw new Error(
-                '.env WALLET_DB_PATH is undefined, see .env.example',
-            );
+        for (const envVar of ['WALLET_DB_PATH']) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/exchange/4-listen-events.ts b/bindings/nodejs/examples/exchange/4-listen-events.ts
index 0ab9604732..d0a0cc600a 100644
--- a/bindings/nodejs/examples/exchange/4-listen-events.ts
+++ b/bindings/nodejs/examples/exchange/4-listen-events.ts
@@ -12,10 +12,12 @@ require('dotenv').config({ path: '.env' });
 
 async function run() {
     try {
-        if (!process.env.WALLET_DB_PATH) {
-            throw new Error(
-                '.env WALLET_DB_PATH is undefined, see .env.example',
-            );
+        for (const envVar of ['WALLET_DB_PATH']) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/accounts_and_addresses/check-balance.ts b/bindings/nodejs/examples/how_tos/accounts_and_addresses/check-balance.ts
index 042db1296a..8f7eec2249 100644
--- a/bindings/nodejs/examples/how_tos/accounts_and_addresses/check-balance.ts
+++ b/bindings/nodejs/examples/how_tos/accounts_and_addresses/check-balance.ts
@@ -12,8 +12,10 @@ require('dotenv').config({ path: '.env' });
 // This example syncs the account and prints the balance.
 async function run() {
     initLogger();
-    if (!process.env.WALLET_DB_PATH) {
-        throw new Error('.env WALLET_DB_PATH is undefined, see .env.example');
+    for (const envVar of ['WALLET_DB_PATH']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     try {
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-accounts.ts b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-accounts.ts
index f3e5662372..e9bf5fa289 100644
--- a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-accounts.ts
+++ b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-accounts.ts
@@ -12,8 +12,10 @@ require('dotenv').config({ path: '.env' });
 // This example lists all accounts in the wallet.
 async function run() {
     initLogger();
-    if (!process.env.WALLET_DB_PATH) {
-        throw new Error('.env WALLET_DB_PATH is undefined, see .env.example');
+    for (const envVar of ['WALLET_DB_PATH']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     try {
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-addresses.ts b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-addresses.ts
index 02e56eb9b5..47f8356e7e 100644
--- a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-addresses.ts
+++ b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-addresses.ts
@@ -12,8 +12,10 @@ require('dotenv').config({ path: '.env' });
 // This example lists all addresses in the account.
 async function run() {
     initLogger();
-    if (!process.env.WALLET_DB_PATH) {
-        throw new Error('.env WALLET_DB_PATH is undefined, see .env.example');
+    for (const envVar of ['WALLET_DB_PATH']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     try {
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-outputs.ts b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-outputs.ts
index a3fe14be53..77a8bf5f51 100644
--- a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-outputs.ts
+++ b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-outputs.ts
@@ -12,8 +12,10 @@ require('dotenv').config({ path: '.env' });
 // This example lists all outputs in the account.
 async function run() {
     initLogger();
-    if (!process.env.WALLET_DB_PATH) {
-        throw new Error('.env WALLET_DB_PATH is undefined, see .env.example');
+    for (const envVar of ['WALLET_DB_PATH']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     try {
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-transactions.ts b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-transactions.ts
index 0cfd55dd81..195d9a059b 100644
--- a/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-transactions.ts
+++ b/bindings/nodejs/examples/how_tos/accounts_and_addresses/list-transactions.ts
@@ -12,8 +12,10 @@ require('dotenv').config({ path: '.env' });
 // This example lists all transactions in the account.
 async function run() {
     initLogger();
-    if (!process.env.WALLET_DB_PATH) {
-        throw new Error('.env WALLET_DB_PATH is undefined, see .env.example');
+    for (const envVar of ['WALLET_DB_PATH']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     try {
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/advanced_transactions/advanced_transaction.ts b/bindings/nodejs/examples/how_tos/advanced_transactions/advanced_transaction.ts
index 94b36a0298..97962a8d65 100644
--- a/bindings/nodejs/examples/how_tos/advanced_transactions/advanced_transaction.ts
+++ b/bindings/nodejs/examples/how_tos/advanced_transactions/advanced_transaction.ts
@@ -19,10 +19,16 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const wallet = new Wallet({
@@ -34,7 +40,9 @@ async function run() {
         await account.sync();
 
         // To sign a transaction we need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // Create an output with amount 1_000_000 and a timelock of 1 hour
         const in_an_hour = Math.floor(Date.now() / 1000) + 3600;
diff --git a/bindings/nodejs/examples/how_tos/advanced_transactions/claim_transaction.ts b/bindings/nodejs/examples/how_tos/advanced_transactions/claim_transaction.ts
index 0a37b082c5..c89d756e69 100644
--- a/bindings/nodejs/examples/how_tos/advanced_transactions/claim_transaction.ts
+++ b/bindings/nodejs/examples/how_tos/advanced_transactions/claim_transaction.ts
@@ -11,10 +11,16 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const wallet = new Wallet({
@@ -26,7 +32,9 @@ async function run() {
         await account.sync();
 
         // To sign a transaction we need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // Get all claimable outputs
         const output_ids = await account.claimableOutputs(OutputsToClaim.All);
diff --git a/bindings/nodejs/examples/how_tos/advanced_transactions/send_micro_transaction.ts b/bindings/nodejs/examples/how_tos/advanced_transactions/send_micro_transaction.ts
index 090ab1a8b4..8fe0853ec0 100644
--- a/bindings/nodejs/examples/how_tos/advanced_transactions/send_micro_transaction.ts
+++ b/bindings/nodejs/examples/how_tos/advanced_transactions/send_micro_transaction.ts
@@ -11,10 +11,16 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const wallet = new Wallet({
@@ -26,7 +32,9 @@ async function run() {
         await account.sync();
 
         // To sign a transaction we need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // Replace with the address of your choice!
         const address =
diff --git a/bindings/nodejs/examples/how_tos/alias/create.ts b/bindings/nodejs/examples/how_tos/alias/create.ts
index 7a69e07591..15c6ff77a0 100644
--- a/bindings/nodejs/examples/how_tos/alias/create.ts
+++ b/bindings/nodejs/examples/how_tos/alias/create.ts
@@ -17,13 +17,14 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     for (const envVar of [
-        'FAUCET_URL',
         'WALLET_DB_PATH',
         'STRONGHOLD_PASSWORD',
-    ])
+        'EXPLORER_URL',
+    ]) {
         if (!(envVar in process.env)) {
             throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
     try {
         // Create the wallet
diff --git a/bindings/nodejs/examples/how_tos/alias/destroy.ts b/bindings/nodejs/examples/how_tos/alias/destroy.ts
index 32d3ec9a7d..8bad0d47f0 100644
--- a/bindings/nodejs/examples/how_tos/alias/destroy.ts
+++ b/bindings/nodejs/examples/how_tos/alias/destroy.ts
@@ -13,13 +13,14 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     for (const envVar of [
-        'FAUCET_URL',
         'WALLET_DB_PATH',
         'STRONGHOLD_PASSWORD',
-    ])
+        'EXPLORER_URL',
+    ]) {
         if (!(envVar in process.env)) {
             throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
     try {
         // Create the wallet
diff --git a/bindings/nodejs/examples/how_tos/alias/governance-transition.ts b/bindings/nodejs/examples/how_tos/alias/governance-transition.ts
index 87a77deb54..636608cb74 100644
--- a/bindings/nodejs/examples/how_tos/alias/governance-transition.ts
+++ b/bindings/nodejs/examples/how_tos/alias/governance-transition.ts
@@ -20,13 +20,14 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     for (const envVar of [
-        'FAUCET_URL',
         'WALLET_DB_PATH',
         'STRONGHOLD_PASSWORD',
-    ])
+        'EXPLORER_URL',
+    ]) {
         if (!(envVar in process.env)) {
             throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
     try {
         // Create the wallet
diff --git a/bindings/nodejs/examples/how_tos/alias/state-transition.ts b/bindings/nodejs/examples/how_tos/alias/state-transition.ts
index d1b230504a..ba2fd75227 100644
--- a/bindings/nodejs/examples/how_tos/alias/state-transition.ts
+++ b/bindings/nodejs/examples/how_tos/alias/state-transition.ts
@@ -15,13 +15,14 @@ const NEW_STATE_METADATA = 'updated state metadata 1';
 async function run() {
     initLogger();
     for (const envVar of [
-        'FAUCET_URL',
         'WALLET_DB_PATH',
         'STRONGHOLD_PASSWORD',
-    ])
+        'EXPLORER_URL',
+    ]) {
         if (!(envVar in process.env)) {
             throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
     try {
         // Create the wallet
diff --git a/bindings/nodejs/examples/how_tos/alias_wallet/request-funds.ts b/bindings/nodejs/examples/how_tos/alias_wallet/request-funds.ts
index 534f723ce8..98cf5d1d2d 100644
--- a/bindings/nodejs/examples/how_tos/alias_wallet/request-funds.ts
+++ b/bindings/nodejs/examples/how_tos/alias_wallet/request-funds.ts
@@ -16,11 +16,13 @@ require('dotenv').config({ path: '.env' });
 // In this example we request funds to an alias wallet.
 async function run() {
     initLogger();
-    if (!process.env.FAUCET_URL) {
-        throw new Error('.env FAUCET_URL is undefined, see .env.example');
+    for (const envVar of ['WALLET_DB_PATH', 'FAUCET_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
     try {
-        const faucetUrl = process.env.FAUCET_URL;
+        const faucetUrl = process.env.FAUCET_URL as string;
 
         // Create the wallet
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/alias_wallet/transaction.ts b/bindings/nodejs/examples/how_tos/alias_wallet/transaction.ts
index 0ffe4ef766..cdf35ec47c 100644
--- a/bindings/nodejs/examples/how_tos/alias_wallet/transaction.ts
+++ b/bindings/nodejs/examples/how_tos/alias_wallet/transaction.ts
@@ -17,10 +17,12 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of ['WALLET_DB_PATH', 'STRONGHOLD_PASSWORD']) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const syncOptions = {
@@ -35,7 +37,9 @@ async function run() {
 
         const account = await wallet.getAccount('Alice');
 
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         const balance = await account.sync(syncOptions);
 
diff --git a/bindings/nodejs/examples/how_tos/client/get-health.ts b/bindings/nodejs/examples/how_tos/client/get-health.ts
index f42d21fd83..f99b3a6fcb 100644
--- a/bindings/nodejs/examples/how_tos/client/get-health.ts
+++ b/bindings/nodejs/examples/how_tos/client/get-health.ts
@@ -10,18 +10,22 @@ require('dotenv').config({ path: '.env' });
 // In this example we will get the node health
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
     try {
-        const isHealthy = await client.getHealth(process.env.NODE_URL);
+        const isHealthy = await client.getHealth(
+            process.env.NODE_URL as string,
+        );
         console.log('Healthy: ', isHealthy);
     } catch (error) {
         console.error('Error: ', error);
diff --git a/bindings/nodejs/examples/how_tos/client/get-info.ts b/bindings/nodejs/examples/how_tos/client/get-info.ts
index 4c6c4188ff..82cd1281bf 100644
--- a/bindings/nodejs/examples/how_tos/client/get-info.ts
+++ b/bindings/nodejs/examples/how_tos/client/get-info.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will get information about the node
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
         localPow: true,
     });
 
diff --git a/bindings/nodejs/examples/how_tos/client/get-outputs.ts b/bindings/nodejs/examples/how_tos/client/get-outputs.ts
index ebbef29b82..945bb167a9 100644
--- a/bindings/nodejs/examples/how_tos/client/get-outputs.ts
+++ b/bindings/nodejs/examples/how_tos/client/get-outputs.ts
@@ -10,13 +10,15 @@ require('dotenv').config({ path: '.env' });
 // In this example we will get the outputs of a known address
 async function run() {
     initLogger();
-    if (!process.env.NODE_URL) {
-        throw new Error('.env NODE_URL is undefined, see .env.example');
+    for (const envVar of ['NODE_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
     }
 
     const client = new Client({
         // Insert your node URL in the .env.
-        nodes: [process.env.NODE_URL],
+        nodes: [process.env.NODE_URL as string],
     });
 
     try {
diff --git a/bindings/nodejs/examples/how_tos/native_tokens/burn.ts b/bindings/nodejs/examples/how_tos/native_tokens/burn.ts
index 1d4ba6e527..55c0e1c4f6 100644
--- a/bindings/nodejs/examples/how_tos/native_tokens/burn.ts
+++ b/bindings/nodejs/examples/how_tos/native_tokens/burn.ts
@@ -18,6 +18,11 @@ const BURN_AMOUNT = BigInt(1);
 // Rename `.env.example` to `.env` first, then run
 // yarn run-example ./how_tos/native_tokens/burn.ts
 async function run() {
+    for (const envVar of ['EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
     try {
         // Create the wallet
         const wallet = await getUnlockedWallet();
diff --git a/bindings/nodejs/examples/how_tos/native_tokens/create.ts b/bindings/nodejs/examples/how_tos/native_tokens/create.ts
index 677020444e..ed639566eb 100644
--- a/bindings/nodejs/examples/how_tos/native_tokens/create.ts
+++ b/bindings/nodejs/examples/how_tos/native_tokens/create.ts
@@ -18,6 +18,11 @@ const MAXIMUM_SUPPLY = BigInt(100);
 // Rename `.env.example` to `.env` first, then run
 // yarn run-example ./how_tos/native_tokens/create.ts
 async function run() {
+    for (const envVar of ['EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
     try {
         // Create the wallet
         const wallet = await getUnlockedWallet();
diff --git a/bindings/nodejs/examples/how_tos/native_tokens/destroy-foundry.ts b/bindings/nodejs/examples/how_tos/native_tokens/destroy-foundry.ts
index 2e7040cd31..d0dd4aa68a 100644
--- a/bindings/nodejs/examples/how_tos/native_tokens/destroy-foundry.ts
+++ b/bindings/nodejs/examples/how_tos/native_tokens/destroy-foundry.ts
@@ -12,6 +12,11 @@ import { getUnlockedWallet } from '../../wallet/common';
 // Rename `.env.example` to `.env` first, then run
 // yarn run-example ./how_tos/native_tokens/destroy-foundry.ts
 async function run() {
+    for (const envVar of ['EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
     try {
         // Create the wallet
         const wallet = await getUnlockedWallet();
diff --git a/bindings/nodejs/examples/how_tos/native_tokens/melt.ts b/bindings/nodejs/examples/how_tos/native_tokens/melt.ts
index 248aa25c3d..1078ce6ff3 100644
--- a/bindings/nodejs/examples/how_tos/native_tokens/melt.ts
+++ b/bindings/nodejs/examples/how_tos/native_tokens/melt.ts
@@ -14,6 +14,11 @@ const MELT_AMOUNT = BigInt(10);
 // Rename `.env.example` to `.env` first, then run
 // yarn run-example ./how_tos/native_tokens/melt.ts
 async function run() {
+    for (const envVar of ['EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
     try {
         // Create the wallet
         const wallet = await getUnlockedWallet();
diff --git a/bindings/nodejs/examples/how_tos/native_tokens/mint.ts b/bindings/nodejs/examples/how_tos/native_tokens/mint.ts
index 241b5c19c9..7778e7458e 100644
--- a/bindings/nodejs/examples/how_tos/native_tokens/mint.ts
+++ b/bindings/nodejs/examples/how_tos/native_tokens/mint.ts
@@ -14,6 +14,11 @@ const MINT_AMOUNT = BigInt(10);
 // Rename `.env.example` to `.env` first, then run
 // yarn run-example ./how_tos/native_tokens/mint.ts
 async function run() {
+    for (const envVar of ['EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
     try {
         // Create the wallet
         const wallet = await getUnlockedWallet();
diff --git a/bindings/nodejs/examples/how_tos/native_tokens/send.ts b/bindings/nodejs/examples/how_tos/native_tokens/send.ts
index 5dfbe6cb97..fbec4bf831 100644
--- a/bindings/nodejs/examples/how_tos/native_tokens/send.ts
+++ b/bindings/nodejs/examples/how_tos/native_tokens/send.ts
@@ -19,6 +19,11 @@ const RECV_ADDRESS =
 // Rename `.env.example` to `.env` first, then run
 // yarn run-example ./how_tos/native_tokens/send.ts
 async function run() {
+    for (const envVar of ['EXPLORER_URL']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
+        }
+    }
     try {
         // Create the wallet
         const wallet = await getUnlockedWallet();
diff --git a/bindings/nodejs/examples/how_tos/nft_collection/00_mint_issuer_nft.ts b/bindings/nodejs/examples/how_tos/nft_collection/00_mint_issuer_nft.ts
index 7df8cbfb94..2d49b19e49 100644
--- a/bindings/nodejs/examples/how_tos/nft_collection/00_mint_issuer_nft.ts
+++ b/bindings/nodejs/examples/how_tos/nft_collection/00_mint_issuer_nft.ts
@@ -22,10 +22,16 @@ require('dotenv').config({ path: '.env' });
 // yarn run-example ./how_tos/nfts/00_mint_issuer_nft.ts
 async function run() {
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         // Create the wallet
@@ -34,7 +40,9 @@ async function run() {
         });
 
         // To sign a transaction we need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // Get the account we generated with `01-create-wallet`
         const account = await wallet.getAccount('Alice');
diff --git a/bindings/nodejs/examples/how_tos/nft_collection/01_mint_collection_nft.ts b/bindings/nodejs/examples/how_tos/nft_collection/01_mint_collection_nft.ts
index c78aeba3b7..e9e840b82e 100644
--- a/bindings/nodejs/examples/how_tos/nft_collection/01_mint_collection_nft.ts
+++ b/bindings/nodejs/examples/how_tos/nft_collection/01_mint_collection_nft.ts
@@ -18,10 +18,16 @@ const NUM_NFTS_MINTED_PER_TRANSACTION = 50;
 // yarn run-example ./how_tos/nfts/01_mint_collection_nft.ts <issuer_nft_id>
 async function run() {
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         // Create the wallet
@@ -30,7 +36,9 @@ async function run() {
         });
 
         // To sign a transaction we need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // Get the account we generated with `how_tos/accounts_and_addresses/create-account`
         const account = await wallet.getAccount('Alice');
diff --git a/bindings/nodejs/examples/how_tos/nfts/burn_nft.ts b/bindings/nodejs/examples/how_tos/nfts/burn_nft.ts
index 52f0e0eff0..45c5d42560 100644
--- a/bindings/nodejs/examples/how_tos/nfts/burn_nft.ts
+++ b/bindings/nodejs/examples/how_tos/nfts/burn_nft.ts
@@ -13,10 +13,16 @@ require('dotenv').config({ path: '.env' });
 // yarn run-example ./how_tos/nfts/burn_nft.ts
 async function run() {
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         // Create the wallet
@@ -28,7 +34,9 @@ async function run() {
         const account = await wallet.getAccount('Alice');
 
         // We need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // May want to ensure the account is synced before sending a transaction.
         let balance = await account.sync();
diff --git a/bindings/nodejs/examples/how_tos/nfts/mint_nft.ts b/bindings/nodejs/examples/how_tos/nfts/mint_nft.ts
index d8853a5dca..a05c2b6fc5 100644
--- a/bindings/nodejs/examples/how_tos/nfts/mint_nft.ts
+++ b/bindings/nodejs/examples/how_tos/nfts/mint_nft.ts
@@ -33,11 +33,16 @@ const NFT2_AMOUNT = '1000000';
 // yarn run-example ./how_tos/nfts/mint_nft.ts
 async function run() {
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
-        }
+        for (const envVar of [
+            'STRONGHOLD_PASSWORD',
+            'WALLET_DB_PATH',
+            'EXPLORER_URL',
+        ])
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
 
         const wallet = new Wallet({
             storagePath: process.env.WALLET_DB_PATH,
@@ -49,7 +54,9 @@ async function run() {
         const senderAddress = (await account.addresses())[0].address;
 
         // We need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         const metadata = new Irc27Metadata(
             'video/mp4',
diff --git a/bindings/nodejs/examples/how_tos/nfts/send_nft.ts b/bindings/nodejs/examples/how_tos/nfts/send_nft.ts
index e0ad2944b8..03ba0bd048 100644
--- a/bindings/nodejs/examples/how_tos/nfts/send_nft.ts
+++ b/bindings/nodejs/examples/how_tos/nfts/send_nft.ts
@@ -17,10 +17,16 @@ const RECV_ADDRESS =
 // yarn run-example ./how_tos/nfts/send_nft.ts
 async function run() {
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'WALLET_DB_PATH',
+            'STRONGHOLD_PASSWORD',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
         }
 
         const wallet = new Wallet({
@@ -31,7 +37,9 @@ async function run() {
         const account = await wallet.getAccount('Alice');
 
         // We need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // May want to ensure the account is synced before sending a transaction.
         const balance = await account.sync();
diff --git a/bindings/nodejs/examples/how_tos/sign_and_verify_ed25519/sign-ed25519.ts b/bindings/nodejs/examples/how_tos/sign_and_verify_ed25519/sign-ed25519.ts
index 5b1e992e7b..acb827b9ae 100644
--- a/bindings/nodejs/examples/how_tos/sign_and_verify_ed25519/sign-ed25519.ts
+++ b/bindings/nodejs/examples/how_tos/sign_and_verify_ed25519/sign-ed25519.ts
@@ -30,12 +30,13 @@ async function run() {
     initLogger();
 
     try {
-        for (const envVar of ['STRONGHOLD_PASSWORD', 'MNEMONIC'])
+        for (const envVar of ['STRONGHOLD_PASSWORD', 'MNEMONIC']) {
             if (!(envVar in process.env)) {
                 throw new Error(
                     `.env ${envVar} is undefined, see .env.example`,
                 );
             }
+        }
 
         const secretManager = new SecretManager({
             stronghold: {
diff --git a/bindings/nodejs/examples/how_tos/sign_secp256k1_ecdsa/sign-secp256k1_ecdsa.ts b/bindings/nodejs/examples/how_tos/sign_secp256k1_ecdsa/sign-secp256k1_ecdsa.ts
index 333a5bd0ed..aed2553f09 100644
--- a/bindings/nodejs/examples/how_tos/sign_secp256k1_ecdsa/sign-secp256k1_ecdsa.ts
+++ b/bindings/nodejs/examples/how_tos/sign_secp256k1_ecdsa/sign-secp256k1_ecdsa.ts
@@ -24,12 +24,13 @@ async function run() {
     initLogger();
 
     try {
-        for (const envVar of ['STRONGHOLD_PASSWORD', 'MNEMONIC'])
+        for (const envVar of ['STRONGHOLD_PASSWORD', 'MNEMONIC']) {
             if (!(envVar in process.env)) {
                 throw new Error(
                     `.env ${envVar} is undefined, see .env.example`,
                 );
             }
+        }
 
         const secretManager = new SecretManager({
             stronghold: {
diff --git a/bindings/nodejs/examples/how_tos/simple_transaction/request-funds.ts b/bindings/nodejs/examples/how_tos/simple_transaction/request-funds.ts
index 2a86b934ef..ea51802304 100644
--- a/bindings/nodejs/examples/how_tos/simple_transaction/request-funds.ts
+++ b/bindings/nodejs/examples/how_tos/simple_transaction/request-funds.ts
@@ -12,11 +12,13 @@ require('dotenv').config({ path: '.env' });
 // This example requests funds from the faucet
 async function run() {
     initLogger();
-    if (!process.env.FAUCET_URL) {
-        throw new Error('.env FAUCET_URL is undefined, see .env.example');
+    for (const envVar of ['FAUCET_URL', 'WALLET_DB_PATH']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is not defined`);
+        }
     }
     try {
-        const faucetUrl = process.env.FAUCET_URL;
+        const faucetUrl = process.env.FAUCET_URL as string;
 
         // Create the wallet
         const wallet = new Wallet({
diff --git a/bindings/nodejs/examples/how_tos/simple_transaction/simple-transaction.ts b/bindings/nodejs/examples/how_tos/simple_transaction/simple-transaction.ts
index 78c4079e5b..c4ea523627 100644
--- a/bindings/nodejs/examples/how_tos/simple_transaction/simple-transaction.ts
+++ b/bindings/nodejs/examples/how_tos/simple_transaction/simple-transaction.ts
@@ -13,10 +13,14 @@ require('dotenv').config({ path: '.env' });
 async function run() {
     initLogger();
     try {
-        if (!process.env.STRONGHOLD_PASSWORD) {
-            throw new Error(
-                '.env STRONGHOLD_PASSWORD is undefined, see .env.example',
-            );
+        for (const envVar of [
+            'STRONGHOLD_PASSWORD',
+            'WALLET_DB_PATH',
+            'EXPLORER_URL',
+        ]) {
+            if (!(envVar in process.env)) {
+                throw new Error(`.env ${envVar} is not defined`);
+            }
         }
 
         const wallet = new Wallet({
@@ -28,7 +32,9 @@ async function run() {
         await account.sync();
 
         // To sign a transaction we need to unlock stronghold.
-        await wallet.setStrongholdPassword(process.env.STRONGHOLD_PASSWORD);
+        await wallet.setStrongholdPassword(
+            process.env.STRONGHOLD_PASSWORD as string,
+        );
 
         // Replace with the address of your choice!
         const address =
diff --git a/bindings/nodejs/examples/secret_manager/generate-addresses.ts b/bindings/nodejs/examples/secret_manager/generate-addresses.ts
index 19ad35482f..ab5ab8c823 100644
--- a/bindings/nodejs/examples/secret_manager/generate-addresses.ts
+++ b/bindings/nodejs/examples/secret_manager/generate-addresses.ts
@@ -10,13 +10,14 @@ require('dotenv').config({ path: '.env' });
 // In this example we will create addresses from a mnemonic defined in .env
 async function run() {
     initLogger();
-
-    try {
-        if (!process.env.MNEMONIC) {
-            throw new Error('.env MNEMONIC is undefined, see .env.example');
+    for (const envVar of ['MNEMONIC']) {
+        if (!(envVar in process.env)) {
+            throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
+    try {
         const mnemonicSecretManager = {
-            mnemonic: process.env.MNEMONIC,
+            mnemonic: process.env.MNEMONIC as string,
         };
 
         const secretManager = new SecretManager(mnemonicSecretManager);
diff --git a/bindings/nodejs/examples/wallet/06-send-micro-transaction.ts b/bindings/nodejs/examples/wallet/06-send-micro-transaction.ts
index 0a69fab288..4ba7541d88 100644
--- a/bindings/nodejs/examples/wallet/06-send-micro-transaction.ts
+++ b/bindings/nodejs/examples/wallet/06-send-micro-transaction.ts
@@ -20,6 +20,13 @@ const RECV_ADDRESS =
 // yarn run-example ./wallet/06-send-micro-transaction.ts
 async function run() {
     try {
+        for (const envVar of ['EXPLORER_URL']) {
+            if (!(envVar in process.env)) {
+                throw new Error(
+                    `.env ${envVar} is undefined, see .env.example`,
+                );
+            }
+        }
         // Create the wallet
         const wallet = await getUnlockedWallet();
 
diff --git a/bindings/nodejs/examples/wallet/migrate-db-chrysalis-to-stardust.ts b/bindings/nodejs/examples/wallet/migrate-db-chrysalis-to-stardust.ts
index 5fa766969c..236c407541 100644
--- a/bindings/nodejs/examples/wallet/migrate-db-chrysalis-to-stardust.ts
+++ b/bindings/nodejs/examples/wallet/migrate-db-chrysalis-to-stardust.ts
@@ -16,10 +16,11 @@ async function run() {
         levelFilter: 'debug',
         targetExclusions: ['h2', 'hyper', 'rustls'],
     });
-    for (const envVar of ['NODE_URL', 'STRONGHOLD_PASSWORD'])
+    for (const envVar of ['NODE_URL', 'STRONGHOLD_PASSWORD']) {
         if (!(envVar in process.env)) {
             throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
     migrateDbChrysalisToStardust(walletDbPath, 'password');
 
diff --git a/bindings/nodejs/examples/wallet/migrate-stronghold-snapshot-v2-to-v3.ts b/bindings/nodejs/examples/wallet/migrate-stronghold-snapshot-v2-to-v3.ts
index 0a3663a269..988d9749f2 100644
--- a/bindings/nodejs/examples/wallet/migrate-stronghold-snapshot-v2-to-v3.ts
+++ b/bindings/nodejs/examples/wallet/migrate-stronghold-snapshot-v2-to-v3.ts
@@ -16,10 +16,11 @@ const v3Path = './v3.stronghold';
 // yarn run-example wallet/migrate-stronghold-snapshot-v2-to-v3.ts
 
 async function run() {
-    for (const envVar of ['NODE_URL', 'STRONGHOLD_PASSWORD'])
+    for (const envVar of ['NODE_URL', 'WALLET_DB_PATH']) {
         if (!(envVar in process.env)) {
             throw new Error(`.env ${envVar} is undefined, see .env.example`);
         }
+    }
 
     let walletOptions: WalletOptions = {
         storagePath: process.env.WALLET_DB_PATH,