Add correct BlockHeight
subtraction & remove panics.
#1521
Merged
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In contrast to the implementation of
Sub<BlockHeight> for BlockHeight
that was removed in version0.3.0
, a saturating subtraction for block heights having a return type ofu32
makes sense forBlockHeight
. Subtracting one block height from another yields the delta between them.Other block height addition and subtraction operations have been made saturating, removing panics and the possibility of overflow.