truffle-config.js

const PrivateKeyProvider = require('@truffle/hdwallet-provider');

const privateKeys = [
  "c87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3"
]

module.exports = {

  networks: {
    besu: {
      gas: 4700000,
      gasPrice: 0,
      provider: () => new PrivateKeyProvider(privateKeys, 'http://127.0.0.1:8545', 0, 10),
      network_id: '*',

    }
  },
  compilers: {
    solc: {
      version: "0.4.24",
      docker: false,
      settings: {
        optimizer: {
          enabled: true,
        }
      }
    }
  }
}