Reportedly proof is considered valid even if the provided height is before transactions, used in proof were created. In this case, it should show proof as invalid at this height, or that height is invalid; maybe it even should suggest the correct height of the last transaction involved in the proof.
Reportedly proof is considered valid even if the provided height is before transactions, used in proof were created. In this case, it should show proof as invalid at this height, or that height is invalid; maybe it even should suggest the correct height of the last transaction involved in the proof.