Zero to Web3: Writing Your First Smart Contract

Deploy Your First Contract in 5 Minutes

The Contract

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract HelloWeb3 {
    string public message;

    constructor(string memory _msg) {
        message = _msg;
    }

    function update(string memory _msg) public {
        message = _msg;
    }
}

Deploy with Remix

1. Open remix.ethereum.org
2. Paste the code
3. Compile (Ctrl+S)
4. Deploy to testnet
5. Call message() to verify

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