My first blockchain tutorial

Once you have installed truffle and ganache you can write a Solidity smart contract: Create a new file with the .sol extension, e.g., MyContract.sol, in the contracts directory of your Truffle project. Then, write your smart contract using Solidity syntax. Here's a simple example:

pragma solidity ^0.8.0;

contract MyContract {
    uint256 public value;

    function setValue(uint256 newValue) public {
        value = newValue;
    }

    function getValue() public view returns (uint256) {
        return value;
    }
}

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Compile and deploy the smart contract: In your Truffle project, create a new migration file in the migrations directory, e.g., 2_deploy_contracts.js, and write the deployment code:

const MyContract = artifacts.require("MyContract");

module.exports = function (deployer) {
  deployer.deploy(MyContract);
};

Now, start Ganache to have a local blockchain running. In your project directory, run the following command to compile and deploy the smart contract:

truffle migrate --network development
  

Interact with the smart contract: You can use the Truffle console to interact with your deployed smart contract:

truffle console --network development
  

In the console, you can call the smart contract's functions. For example:

const myContract = await MyContract.deployed();
await myContract.setValue(42);
const value = await myContract.getValue();
console.log(value.toNumber());