We need to query all the past transfer events of a contract to identify all historic token holder addresses. Am I right that for this we need a full node and can't use fast mode?
I've read that fast mode prunes old blocks and querying past events seems to work like this using fromBlock=0. So I expect transfer events that wouldn't show up in the future using fast mode, right?
I just wanted this confirmed because hosting a full-node is quite a bit more expensive. Any ideas how to solve this without full node are welcome.