module.exports = { networks: { development: { host: '127.0.0.1', port: 9545, network_id: '4020', gasPrice: '10000000000', //10 gwei }, }, compilers: { solc: { version: '0.6.12', // Fetch exact version from solc-bin (default: truffle's version) docker: true, settings: { optimizer: { enabled: true, runs: 200, // Optimize for how many times you intend to run the code }, evmVersion: 'istanbul', }, }, }, db: { enabled: true, }, }