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)

2. Add the Neura Testnet to your wallet:

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

1. Fund your wallet with testnet tokens from the Neura Faucet:

   • Neura Faucet

2. Open Remix IDE in your browser, and start working in a default workspace.

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Create and Configure Contract

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

   
2. Name it Greeter.sol.

3. Paste the following contract code:

// 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.

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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.

   
2. Successful compilation is shown by the green check mark on the Compiler tab in the left sidebar.

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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"

1. Confirm the transaction in your MetaMask wallet.

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Deployed Contract Output

Once successful, you'll be able to:

• See a Deployed Contracts pane with the following info:

Deployed at: 0xABC123...

• Interact with the deployed contract interface.

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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).