diff --git a/.gitignore b/.gitignore
index 1dc3fa32..9befab58 100644
--- a/.gitignore
+++ b/.gitignore
@@ -77,6 +77,7 @@ typings/
 # dotenv environment variables file
 .env
 .env.test
+.env.local
 
 # parcel-bundler cache (https://parceljs.org/)
 .cache
diff --git a/cspell.config.cjs b/cspell.config.cjs
index 38176103..33aecf78 100644
--- a/cspell.config.cjs
+++ b/cspell.config.cjs
@@ -12,6 +12,7 @@ module.exports = {
     '**/*.sol',
     'pnpm-lock.yaml',
     'CHANGELOG.md',
+    '.gitignore',
   ],
   words: vscodeConfig['cSpell.words'],
 };
diff --git a/examples/sdk-simple/.env.example b/examples/sdk-simple/.env.example
new file mode 100644
index 00000000..10c52760
--- /dev/null
+++ b/examples/sdk-simple/.env.example
@@ -0,0 +1,2 @@
+EVM_PRIVATE_KEY=
+POLKADOT_PRIVATE_KEY=
diff --git a/examples/sdk-simple/index.ts b/examples/sdk-simple/index.ts
index 145ac476..0b106fc7 100644
--- a/examples/sdk-simple/index.ts
+++ b/examples/sdk-simple/index.ts
@@ -5,26 +5,33 @@ import { cryptoWaitReady } from '@polkadot/util-crypto';
 import { http, type Address, createWalletClient } from 'viem';
 import { privateKeyToAccount } from 'viem/accounts';
 
+const { EVM_PRIVATE_KEY, POLKADOT_PRIVATE_KEY } = process.env;
+
+if (!EVM_PRIVATE_KEY || !POLKADOT_PRIVATE_KEY) {
+  throw new Error(
+    'Env variables EVM_PRIVATE_KEY and POLKADOT_PRIVATE_KEY must be defined',
+  );
+}
 // Moonbeam Signer ===========================================================
 
-const moonbeamPrivateKey = '';
-const account = privateKeyToAccount(moonbeamPrivateKey as Address);
+const account = privateKeyToAccount(EVM_PRIVATE_KEY as Address);
 const walletClient = createWalletClient({
   account,
   chain: moonbeam.getViemChain(),
   transport: http(),
 });
 
-// Polkadot Signer ===========================================================
+console.log(`\nMoonbeam address: ${account.address}`);
 
-const polkadotPrivateKey = '';
+// Polkadot Signer ===========================================================
 
 await cryptoWaitReady();
 const keyring = new Keyring({
   ss58Format: polkadot.ss58Format,
   type: 'sr25519',
 });
-const pair = keyring.createFromUri(polkadotPrivateKey);
+const pair = keyring.createFromUri(POLKADOT_PRIVATE_KEY);
+console.log(`Substrate address: ${pair.address}`);
 
 // ===========================================================================
 
@@ -64,19 +71,19 @@ export function logTxDetails(data: TransferData): void {
 export async function fromPolkadot() {
   console.log('\nTransfer from Polkadot to Moonbeam\n');
 
-  const data = await Sdk().getTransferData({
-    destinationAddress: account.address,
-    destinationKeyOrChain: moonbeam,
-    keyOrAsset: dot,
-    polkadotSigner: pair,
-    sourceAddress: pair.address,
-    sourceKeyOrChain: polkadot,
-  });
+  const data = await Sdk()
+    .setAsset(dot)
+    .setSource(polkadot)
+    .setDestination(moonbeam)
+    .setAddresses({
+      sourceAddress: pair.address,
+      destinationAddress: account.address,
+    });
 
   logBalances(data);
   logTxDetails(data);
 
-  const amount = +data.min.toDecimal() * 2;
+  const amount = +data.min.toDecimal() * 1.5;
 
   console.log(`Sending from ${data.source.chain.name} amount: ${amount}`);
 
@@ -89,16 +96,18 @@ export async function fromMoonbeam() {
   console.log('\nTransfer from Moonbeam to Polkadot\n');
 
   const data = await Sdk()
-    .assets()
-    .asset(dot)
-    .source(moonbeam)
-    .destination(polkadot)
-    .accounts(account.address, pair.address);
+    .setAsset(dot)
+    .setSource(moonbeam)
+    .setDestination(polkadot)
+    .setAddresses({
+      sourceAddress: account.address,
+      destinationAddress: pair.address,
+    });
 
   logBalances(data);
   logTxDetails(data);
 
-  const amount = +data.min.toDecimal() * 2;
+  const amount = +data.min.toDecimal() * 1.5;
 
   console.log(`Sending from ${data.source.chain.name} amount: ${amount}`);
 
@@ -119,7 +128,7 @@ async function main() {
 
   await fromPolkadot();
   console.log('\nWaiting 30 seconds...');
-  await setTimeout(30000);
+  await new Promise((resolve) => setTimeout(resolve, 30000));
   await fromMoonbeam();
 }