So I did this simple greeter smart contact (tutorial here: https://www.ziggify.com/blog/blockchain-stack-1-installing-ethereum-geth-smart-contract/)
Very simple. Just a greeter.greet() and it returns hello world.
It works when I first did it. But then I logged in today and it no longer works saying greeter is not defined.
Why would my smart contract disappear? Why cant I use greeter anymore? I know its on the blockchain because it shows up on https://ropsten.etherscan.io