# 🚀 Deploying Smart Contracts Using Truffle with GSMC (Gasless)

### **Prerequisites**

Before deploying the smart contracts, ensure that you have the following set up:

* **Node.js & npm** are installed on your system.
* **Truffle** is installed globally using:

  ```sh
  npm install -g truffle
  ```
* A configured **Truffle project** with the necessary contracts and migration scripts.
* A properly configured **truffle-config.js** file.
* Your private Ethereum network (`myPOSNetwork`) set up and accessible.

> ⚠️ **Developer Note:**\
> You will require a **one-time transfer of 0.01 ETH** to sign the **GSMC approval transaction**. This approval enables the use of **GSMC as gas** for smart contract deployments.\
> Once approved, you can deploy contracts using GSMC according to the approved amount—**no need to use ETH for every deployment**.\
> On the private PoS network, this ETH is **faucet-based** and free. On mainnet, however, the Relayer will handle ETH payments on behalf of users.

### **Deployment Steps**

#### ✅ Step 1: Approve GSMC Usage

Before deploying contracts using GSMC, you must **approve** the relayer to spend GSMC on your behalf. This step uses **ETH** to sign the approval and is required **only once**.

> 💡 **Tip:**\
> The approval amount is set to **1000 GSMC**, allowing you to deploy multiple contracts without needing to re-approve.

#### 🔧 Run the approval script:

```bash
node scripts/approveGSMC.js
```

If successful, your address will be approved to use GSMC for deployment fees.

***

#### ✍️ Step 2: Sign the Deployment Request

After approving GSMC, sign the smart contract deployment request.

* An **example request** is available in the project.
* Ensure the request includes:

  ```js
  const gsmcFee = ethers.utils.parseUnits("10", 18);
  ```

  This sets the deployment cost to **10 GSMC (minimum GSMC Gas Fee)**.
* **Replace** `contractArtifact` with your **compiled contract JSON** (e.g., `SimpleContract.json`).

> 🛠️ You can compile the contract using:
>
> ```bash
> truffle compile
> ```

#### 🔧 Run the signing script:

```bash
node scripts/signDeployRequest.js
```

Upon success, a file named `deployRequest.json` will be generated.

***

#### 📡 Step 3: Deploy the Smart Contract via Relayer

Use the following `curl` command to send the signed deployment request to the network relayer:

```bash
curl -X POST http://34.46.205.31:6060/deploy \
  -H "Content-Type: application/json" \
  --data-binary @deployRequest.json
```

***

#### ✅ Step 4: Confirm Deployment

After a successful deployment, the API response will include a transaction hash (`tx`). You can use this hash to track the contract deployment status on your private network.

***

Happy Building with GSMC! 🛠️✨