Integrating blockchain seems to be pretty straightforward for the first run. We can take an exisiting blockchain solution and validate all of the CRUD operations with the help of the blockchain. As in the following example implemented with Solidity, we can be sure that as soon as the blockchain raises our event, the given operation has been already validated by Ehereum.
contract DB {
event CRUDOperationEvent (string operation);
function CRUDOperation (string _operation) {
CRUDOperationEvent(_operation);
}
}
Certainly, it is questionable if such an integration makes sense at all, because the performance of the system will be surely dependent on the consensus algorithm itself, meaning that one has to wait for the operation around 15 second. Another issue might be the fact that the database is actually an external element from blockchain, so it is questionable how a real trusted integration can be realized.
