Using web.js, I can query the event logs of a contract using the "web3.eth.filter" method. The documentation states that this method accepts an object with a "topics" property, which is says are "An array of values which must each appear in the log entries".
My question, can I match a substring of a topic? For example, say I have an event like this:
event AddedEntity ( string indexed _title string indexed _contents, uint256 indexed _id );
and I fire that event in the smart contract like so:
AddedEntity("Week 34", "Interesting Data", 142);
Can I search the contract's event logs for the keyword "Interesting" and expect a match? Or will I only find a match if I search for "Interesting Data"?