Introduction
This tutorial will walk you through creating a simple smart contract using the Solidity programming language.
Prerequisites
To follow this tutorial, you will need:
- A Solidity development environment, such as Remix, which is an online IDE for developing smart contracts on the Ethereum blockchain.
- A basic understanding of Solidity and object-oriented programming.
Creating a new smart contract
Open the Remix IDE in your browser. We'll start by creating a new Solidity file. Click "+" in the upper left corner to create a new file. Name it SimpleStorage.sol.
Put the following code into SimpleStorage.sol:
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
contract SimpleStorage {
uint256 public data;
function set(uint256 x) public {
data = x;
}
function get() public view returns (uint256) {
return data;
}
}This contract has a single state variable, data, and two functions, set() and get(). set() changes the value of data, while get() returns its current value.
Compiling the smart contract
To compile the contract, switch to the "Solidity Compiler" tab in Remix and click "Compile SimpleStorage.sol".
If there are no errors in the code, the build should succeed without any problems.
Smart contract deployment
To deploy the contract on the blockchain, go to the "Deploy & Run Transactions" tab. Choose "JavaScript VM" as the execution environment, then click "Deploy".
You will now see your contract under "Deployed Contracts". You can interact with the contract using the set() and get() functions. For example, try setting data to a number and then fetching it with get().
Conclusion
Congratulations! You have just created, compiled and implemented your first smart contract using Solidity. From here, you can start further exploring Solidity's capabilities to develop more complex smart contracts.
