I started developing a small dapp and I would like to check if a process is running from the smart contract and if yes, then execute something. I found out that I need oracles in order to fetch some external data to the smart contract.
Although, I have the following questions/concerns: 1) Is there a tutorial on how to develop my custom oracle and how to use it in a smart contract? 2) Is it a good idea to use implement an oracle myself and use it? How oracles build trust to the users?
EDIT I don't want to use Oraclize.it since I want to fetch my own data.