Hi Sandeep, thanks for your great post. I am having problems when I try to test on Ropsten. I successfully passed Truffle test; but on truffle migrate --network ropsten I got this: Running migration: 1_initial_migration.js Deploying Migrations... Error encountered, bailing. Network state unknown. Review successful transactions manually. insufficient funds for gas * price + value I Tried to change gas value many times, but nothing happened. Could you help me? thanks