Mastering Blockchain Programming with Solidity

Updating configuration

In the truffle-config.js file, you will find the compilers' settings. You will need to uncomment the required parameters for this setting. As we are going to use Solidity compiler version ^0.5.0, we have updated the configuration accordingly. We also want our deployed contracts to be optimized, hence, we have enabled that flag. The following is the configuration for compilers in the truffle-config.js file:

compilers: {  solc: {     version: "^0.5.0",         docker: false,      settings: {       optimizer: {        enabled: true,        runs: 200      },      evmVersion: "byzantium"     }  }}

Also, uncomment the development network configuration in the truffle-config.js file. After this configuration setup, you are ready to write your contract in the contracts folder ...