> ## Documentation Index
> Fetch the complete documentation index at: https://whitelabelled-staking-docs.adamik.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Using Adamik API with Ethereum

This guide demonstrates how to create, sign, and broadcast a transaction using the Adamik API along with a common Ethereum library, `ethers.js`. This tutorial is perfect for developers who want to integrate Adamik's features into their Ethereum workflows, ensuring secure and efficient transaction management.

## Prerequisites

* **Node.js** and **npm** installed
* Basic understanding of Ethereum and transaction workflows
* Familiarity with the `ethers.js` library

## Step-by-Step Guide

### 1. Setting Up the Environment

Ensure you have the `ethers` library installed in your project:

```bash theme={null}
npm install ethers
```

### 2. Writing the Script

Below is the script that handles the full transaction flow, from creating a wallet to broadcasting the signed transaction.

```javascript theme={null}
import { Wallet } from "ethers";

// Replace with your wallet's mnemonic phrase
const walletPhrase = "...";
const ADAMIK_API_KEY = "your-adamik-api-key"; // get it from https://dashboard.adamik.io
const recipientAddress = "";

async function main() {
  // Create wallet using mnemonic phrase
  const wallet = Wallet.fromPhrase(walletPhrase);

  // Prepare the transaction request
  const requestBody = {
    transaction: {
      data: {
        chainId: "sepolia", // Target Ethereum testnet chain
        mode: "transfer",
        sender: wallet.address,
        recipient: recipientAddress || wallet.address, // Self-send if no recipient
        amount: "10000", // Transaction amount
        useMaxAmount: false,
        fees: "0",
        gas: "0",
        memo: "",
        format: "hex",
        validatorAddress: "",
        params: {
          pubKey: wallet.publicKey, // Public key of the wallet
        },
      },
    },
  };

  // Encode the transaction with Adamik API
  const responseEncode = await fetch(
    "https://api.adamik.io/api/sepolia/transaction/encode",
    {
      method: "POST",
      headers: {
        Authorization: ADAMIK_API_KEY,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(requestBody),
    }
  );

  const encodedData = await responseEncode.json();
  console.log(encodedData);

  // Sign the encoded transaction
  const tx = encodedData.transaction.encoded;
  const signature = await wallet.signTransaction(tx);

  // Prepare to broadcast the signed transaction
  const sendTransactionBody = {
    transaction: {
      data: encodedData.transaction.data,
      encoded: tx,
      signature: signature,
    },
  };

  // Broadcast the transaction using Adamik API
  const responseBroadcast = await fetch(
    "https://api.adamik.io/api/sepolia/transaction/broadcast",
    {
      method: "POST",
      headers: {
        Authorization: ADAMIK_API_KEY,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(sendTransactionBody),
    }
  );

  const responseData = await responseBroadcast.json();
  console.log("Transaction Result:", JSON.stringify(responseData));
}

main();
```

### 3. Explanation

* **Wallet Creation**: The script begins by creating a wallet using a mnemonic phrase, which is crucial for managing private keys. Please note Adamik API doesn't have the custody of the assets.
* **Transaction Encoding**: The transaction details are passed to the Adamik API, which translates them into a raw transaction to be signed.
* **Signing and Broadcasting**: The transaction is then signed with the wallet's private key and finally broadcast to the Ethereum network using the Adamik API.

### 4. Troubleshooting

* **Invalid API Key**: Ensure your Adamik API key is correct.
* **Network Issues**: Verify network availability and Adamik API status.
* **Security Note**: Never hardcode sensitive information like mnemonic phrases in your production environment.

### 5. Get in Touch

Connect with us through our [Discord Server](https://discord.gg/gsZJR2JfMR) or direclty through [GitHub](https://github.com/AdamikHQ).