# Deploying & Writing to a Stellar Smart Contract (Oracle Example)

With K3 Labs, you can deploy a Stellar smart contract from GitHub and create workflows to write data to it, like updating price feeds for oracles. This guide walks you through the entire process.

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#### 1. Deploy a Stellar Smart Contract

**Step 1: Open Deploy Page**

* Go to **Deploy > Deploy Stellar Contract**.

<figure><img src="/files/MQpZTu1MLxLofigJWCuh" alt=""><figcaption></figcaption></figure>

**Step 2: Fill in Deployment Details**

* **GitHub Repository URL**: Paste your smart contract repo. Example:\
  `https://github.com/k3-labs/stellar-data-contract`\
  (This example creates a contract to store and update data like prices.)
* **Wallet**: Select your Stellar wallet to pay for gas.

  > You can create a Stellar wallet using our **Cubist integration** if needed. See [Cubist integration page](/introduction/integrations/cubist-wallet.md) for more details.&#x20;
* **Network**: By defaul **Mainnet** is selected. You can opt-in for **Testnet** using a checkmark below.

<figure><img src="/files/51WBL6q78r9Un6Sq8yab" alt=""><figcaption></figcaption></figure>

**Step 3: Deploy**

* Click **Deploy**.
* After a few seconds, you’ll receive a confirmation message with your **Smart Contract Address**.

<figure><img src="/files/VueElXhhqsgWlO0AFqJK" alt=""><figcaption></figcaption></figure>

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#### 2. Create a Workflow to Update Oracle Data

Now, let’s create an automation to periodically update this contract with BTC prices.

**Example Workflow:**

| Step                           | Function                                                                                                                                                            | Setup                                                        |
| ------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| **1. Trigger**                 | **Schedule**                                                                                                                                                        | Run every **1 Hour**                                         |
| **2. Market Data**             | **Read BTC Price**                                                                                                                                                  | Source: Market Data API or eOracle contract                  |
| **3. Write to Smart Contract** | <p>- Blockchain: Stellar<br>- Contract Address: <em>(Your Deployed Contract Address)</em><br>- Method: <code>Write</code><br>- Value: Use BTC price from Step 2</p> |                                                              |
| **4. Alerts**                  | **Email**                                                                                                                                                           | Send yourself a confirmation with price and transaction hash |

See an example of the Write to Smart Contract set up below.

<figure><img src="/files/4pMJ8pG9Tit4uZAMe3eN" alt="" width="353"><figcaption></figcaption></figure>

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#### 3. Visual Example:

<figure><img src="/files/khIZ8LIkCKXZzPBYRmmU" alt=""><figcaption></figcaption></figure>

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#### 4. Notes:

* Your Stellar wallet must have enough XLM to cover transaction fees.
* This example uses a simple `Write` method. You can adapt it for other data types or use cases.
* Works with **both Mainnet and Testnet**.

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#### Benefits:

✅ Deploy & manage custom Stellar contracts in minutes\
✅ Automate data updates like prices, indexes, and metrics\
✅ Secure wallet integration & gas management via Cubist\
✅ Scalable for DeFi, Oracles, and Data Publishing


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