# FIREBLOCKS

The Fireblocks Network is a secure transfer network that allows you to instantly find, connect, and move digital assets across exchanges, fiat providers, liquidity partners, and counterparties.

To use FIREBLOCKS with expand.network [<mark style="color:blue;">**SDK**</mark>](https://github.com/expand-network/sdk-nodejs.git), follow these steps:-

### **Step 1:** Installation

&#x20;User needs to install the expand.network SDK using the following command:&#x20;

```git
npm i expand-network
```

### **Step 2: Wallet Initialisation**

```javascript
const {  WalletFireblocks, prepareTransaction } = require('expand-network');
const xApiKey = 'YOUR_API_KEY';                //Replace this with your API key
const dotenv = require('dotenv');
const fs = require('fs');
const path = require('path');
const apiSecret = fs.readFileSync(path.resolve("SECRET_KEY_FILE_PATH"), "utf8");
async function initialiseFireblocksWallet(){
    const options = {
      apiSecret: apiSecret,
      apiKey: "FIREBLOCKS_API_KEY",        //Replace this with your Fieblocks API key
    }
    const wallet  = new WalletFireblocks(options);
    return wallet;
}

const wallet = await initialiseFireblocksWallet();    //Initialise the wallet
```

### **Step 3: Prepare Transaction**

<pre class="language-javascript"><code class="lang-javascript">// Preparing the approve transaction from expand.network
<strong>const preparedTx = await prepareTransaction("https://api.expand.network/fungibletoken/approve", {
</strong>        "from": "FIREBLOCKS_WALLET_ADDRESS",
        "tokenAddress":"0x6B175474E89094C44Da98b954EedeAC495271d0F",
        "amount": "10000",
        "to": "SPENDER_WALLET_ADDRESS",
        "gas": "100000",
        "chainId": "1",                    // Replace with other chainId to toggle between chains
        "xApiKey": "YOUR_API_KEY",        // Replace this with your API Key
    });
</code></pre>

### **Step 4: Sign Transaction**

```javascript
// Sign the transaction locally using sdk client
const signedTx = await wallet.signTransaction(preparedTx);
console.log(signedTx);
```

### **Step 5: Send Transaction**

```javascript
// Send the signed transaction
const tx = await wallet.sendTransaction(signedTx);
console.log(tx);
```

### Sample code to approve a fungible token using Fireblocks Wallet:&#x20;

```javascript
const {  WalletFireblocks, prepareTransaction } = require('expand-network');
const xApiKey = 'YOUR_API_KEY';
const dotenv = require('dotenv');
const fs = require('fs');
const path = require('path');
const apiSecret = fs.readFileSync(path.resolve("SECRET_KEY_FILE_PATH"), "utf8");
async function initialiseFireblocksWallet(){
    const options = {
      apiSecret: apiSecret,
      apiKey: "FIREBLOCKS_API_KEY",        
    }
    const wallet  = new WalletFireblocks(options);
    return wallet;
}
async function main() {
    dotenv.config();
    const wallet = await initialiseFireblocksWallet();
    const preparedTx = await prepareTransaction("https://api.expand.network/fungibletoken/approve", {
        "from": "FIREBLOCKS_WALLET_ADDRESS",
        "tokenAddress":"TOKEN_CONTRACT_ADDRESS",
        "amount": "10000",
        "to": "SPENDER_WALLET_ADDRESS",
        "gas": "100000",
        "chainId": "1",
        "xApiKey": "YOUR_API_KEY",
    });
    const signedTx = await wallet.signTransaction(preparedTx);
    console.log(signedTx);
    const tx = await wallet.sendTransaction(signedTx);
    console.log(tx);
}
main();
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.expand.network/integrations/supported-wallets/mpc-wallets/fireblocks.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.