1) add max aff fee bp mimir #check-lint-warning PR: https://gitlab.com/thorchain/thornode/-/merge_requests/2745 2) [bugfix] Use correct observed tx for refund PR: https://gitlab.com/thorchain/thornode/-/merge_requests/2744 3) Complete !2744 by fixing the order book change as well: https://gitlab.com/thorchain/thornode/-/merge_requests/2747