Get the last block height of an era

Reporter: community

Currently I am searching "era_end" field from casper-client get-block. But this command has to be issued several times to find the exact block height.

Trying to figure out how to find all last blocks for all eras in one month with the least number of calls to api.
The user also asked if we can get auction(state_get_auction_info) info and era info (chain_get_era_info_by_switch_block)by eraid instead of block heigh/hash