# Remix

Remix is a browser-based IDE that allows developers to write, compile, deploy, and interact with smart contracts — no local setup required. This guide walks you through deploying a contract to the Neura Testnet using Remix and MetaMask.

### Prerequisites

Before you begin, make sure to:

1. Install a Web3 wallet (e.g., [MetaMask](https://metamask.io))
2. Add the Neura Testnet to your wallet:

```yaml
Network Name: Neura Testnet
RPC URL: https://testnet.rpc.neuraprotocol.io/
Chain ID: 267
Currency Symbol: ANKR
```

3. Fund your wallet with testnet tokens from the Neura Faucet:
   * [Neura Faucet](https://neuraverse.neuraprotocol.io/?section=faucet)
4. Open [Remix IDE](https://remix.ethereum.org/) in your browser, and start working in a default workspace.

***

### Create and Configure Contract

1. On the **File Explorer** tab, in the `contracts/` folder, click **Create a new file**.

   <figure><img src="https://4197251523-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhvwKrpbXS8o3glsiZCRj%2Fuploads%2FKxJeI9ME3OROqNWs86ao%2Fremix-create-file.png?alt=media&#x26;token=85c88153-5512-42e7-9666-f2a4dc8e5c2c" alt=""><figcaption></figcaption></figure>
2. Name it `Greeter.sol`.
3. Paste the following contract code:

```solidity
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0 <=0.8.24;

contract Greeter {
    string public greeting;

    constructor(string memory _greeting) {
        greeting = _greeting;
    }

    function setGreeting(string calldata _greeting) external {
        greeting = _greeting;
    }
}
```

**Note**: Neura supports Solidity compiler versions from `0.8.0` to `0.8.24`, inclusive. Use this range for compatibility.

***

### Compile Contract

1. On the **Solidity compiler** tab, select the compatible compiler version (`0.8.0` — `0.8.24`), and then click **Compile Greeter.sol**.<br>

   <figure><img src="https://4197251523-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FhvwKrpbXS8o3glsiZCRj%2Fuploads%2F82FcxOBRiBUJf0tD4GW9%2Fremix-compile.png?alt=media&#x26;token=2bfb8128-d35f-4f9c-9cbf-b31ece19f1f5" alt=""><figcaption></figcaption></figure>
2. Successful compilation is shown by the green check mark on the **Compiler** tab in the left sidebar.

***

### Deploy to Neura Testnet

1. On the **Deploy & run transactions** tab, do the following:
   * Set **Environment** to: **Browser extension >** **Injected Provider — MetaMask**.
   * Allow Remix to connect to your wallet (MetaMask popup).
   * Confirm that the connected Chain ID is 267 (Neura Testnet).
2. In the **Contract** field, select `Greeter — contracts/Greeter.sol`.
3. Enter your greeting string in the corresponding field, and then click **Deploy**.

```
"hello, neura"
```

4. Confirm the transaction in your MetaMask wallet.

***

### Deployed Contract Output

Once successful, you'll be able to:

* See a **Deployed Contracts** pane with the following info:

```yaml
Deployed at: 0xABC123...
```

* Interact with the deployed contract interface.

***

### Interact with Contract

Use Remix’s GUI to interact:

* `greeting()` — call the getter to return the current greeting.
* `setGreeting(string)` — update the greeting (triggers a MetaMask transaction confirmation).