I was poking around some ICRC1 stuff and saw this stuff about a fee_collector(I think @levi was adding a fee_collector as well as a way to update the fee on an SNS). It look like from https://github.com/dfinity/ic/blob/310743758d41e1bead72322c6a5bf8e77c4eac12/rs/rosetta-api/ledger_core/src/block.rs#L43 that these changes may actually be added to the blockchain as blocks…and that transfers with a fee_collector may have an extra fee_collector field in their transaction. We don’t have this defined in ICRC3 as far as I know. Do we need to add these event type blocks? Others might be changes to the minting account, initial balances, maybe some others I’m not thinking of off the top of my head.