diff --git a/.gitignore b/.gitignore
index 80d25ea..c64ebad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 /target/
 .envrc
-.DS_Store
\ No newline at end of file
+.DS_Store
+node_modules
+.yarn
diff --git a/src/signers/common.rs b/src/signers/common.rs
index 59431eb..f0b1784 100644
--- a/src/signers/common.rs
+++ b/src/signers/common.rs
@@ -27,14 +27,11 @@ pub async fn handle_eth_sign_transaction(
     let tx_envelope = tx_request.build(&signer).await?;
     println!("tx_envelope: {:?}", tx_envelope.tx_type());
     println!("tx_envelope: {:?}", tx_envelope);
-    tx_envelope.signature_hash();
 
     let mut encoded_tx = vec![];
-    encoded_tx.push(tx_envelope.tx_type() as u8);
     tx_envelope.encode(&mut encoded_tx);
     println!("encoded_tx: {:?}", encoded_tx);
     let rlp_hex = hex::encode_prefixed(encoded_tx);
-
     println!("rlp_hex: {:?}", rlp_hex);
 
     Ok(JsonRpcReply {
diff --git a/test/index.js b/test/index.js
new file mode 100644
index 0000000..2c36097
--- /dev/null
+++ b/test/index.js
@@ -0,0 +1,123 @@
+const axios = require('axios')
+const readlineSync = require('readline-sync');
+const { createPublicClient, http, parseEther, createWalletClient, formatEther } = require('viem');
+const { privateKeyToAccount } = require('viem/accounts');
+const { anvil } = require('viem/chains')
+
+const DEAD_ADDRESS = '0x000000000000000000000000000000000000dEaD'
+
+async function main() {
+  console.log('Welcome to Upnode signer-proxy integration test')
+
+  const publicClient = createPublicClient({
+    chain: anvil,
+    transport: http()
+  })
+
+  const testWalletClient = createWalletClient({
+    chain: anvil,
+    transport: http(),
+  })
+
+  // test dummy account, don't use in the production!!!
+  const testAccount = privateKeyToAccount('0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80')
+
+  let blockNumber, chainId;
+
+  try {
+    blockNumber = await publicClient.getBlockNumber()
+    chainId = await publicClient.chain.id
+  } catch (err) {
+    console.error(err)
+    console.log("Can't connect to the chain, please start anvil")
+  }
+
+  console.log('Chain', chainId, 'connected block number', blockNumber)
+
+  const endpoint = readlineSync.question('Enter signer endpoint: ')
+
+  console.log('Getting wallet address...')
+
+  const addressResponse = await axios.get(`${endpoint}/address`);
+  const address = addressResponse.data.address
+
+  console.log('Wallet Address:', address)
+
+  {
+    // Transfer some fund to the wallet
+    const hash = await testWalletClient.sendTransaction({
+      account: testAccount,
+      to: address,
+      value: parseEther('0.0002'),
+    })
+
+    await publicClient.waitForTransactionReceipt({ hash })
+  }
+
+  // Get target balance before
+  const balanceBefore = await publicClient.getBalance({
+    address: DEAD_ADDRESS,
+  })
+
+  console.log('Balance Before:', formatEther(balanceBefore))
+
+  const nonce = await publicClient.getTransactionCount({ address })
+
+  const transaction = {
+    from: address,
+    to: DEAD_ADDRESS,
+    value: parseEther('0.0001').toString(),
+    gas: 21500,
+    gasPrice: 1000000000,
+    nonce,
+    data: '0x123456',
+    chainId: chainId,
+  };
+
+  const txResponse = await axios.post(endpoint, {
+    jsonrpc: '2.0',
+    method: 'eth_signTransaction',
+    params: [transaction],
+    id: 1,
+  })
+  const rawTx = txResponse.data.result
+  
+  console.log('Signed Tx:', rawTx)
+
+  {
+    // Submit signed transaction
+    const hash = await publicClient.sendRawTransaction({
+      serializedTransaction: rawTx,
+    })
+    
+    console.log('Transaction submitted hash:', hash)
+    setTimeout(() => console.log("If it has been taking long then there's something wrong..."), 5000)
+
+    await publicClient.waitForTransactionReceipt({ hash })
+    const transaction = await publicClient.getTransaction({ hash })
+
+    console.log('Transaction confirmed')
+
+    if (transaction.input != '0x123456') {
+      console.error('!!! Transaction input is not matched !!!')
+    }
+  }
+
+  // Get target balance before
+  const balanceAfter = await publicClient.getBalance({
+    address: DEAD_ADDRESS,
+  })
+
+  console.log('Balance After:', formatEther(balanceAfter))
+
+  if (balanceAfter - balanceBefore === parseEther('0.0001')) {
+    console.log('Test passed')
+  } else {
+    console.log('!!! Incorrect balance diff:', formatEther(balanceAfter - balanceBefore), '!!!')
+  }
+}
+
+main().then(() => process.exit(0)).catch(err => {
+  console.error(err)
+  process.exit(1)
+})
diff --git a/test/package.json b/test/package.json
new file mode 100644
index 0000000..e435234
--- /dev/null
+++ b/test/package.json
@@ -0,0 +1,16 @@
+{
+  "name": "signer-proxy-integration-test",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "node index.js"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "axios": "^1.7.4",
+    "readline-sync": "^1.4.10",
+    "viem": "^2.20.0"
+  }
+}
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new file mode 100644
index 0000000..ebe8803
--- /dev/null
+++ b/test/yarn.lock
@@ -0,0 +1,241 @@
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+
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