An empty history query doesn't always mean nothing happened.
Mina's documentation says its regular node keeps only recent blocks, while historical transactions and zkApp events come from archive data. The archive API also limits the block range searched; without a range, older events can fall outside the results.
For $MINA app users, that's a useful question when an explorer looks incomplete: which data source and period did it check? Missing results alone aren't proof that a transaction never existed.
Mina's documentation says its regular node keeps only recent blocks, while historical transactions and zkApp events come from archive data. The archive API also limits the block range searched; without a range, older events can fall outside the results.
For $MINA app users, that's a useful question when an explorer looks incomplete: which data source and period did it check? Missing results alone aren't proof that a transaction never existed.