[pallet-revive] implement the block hash API (#6246)
- Bound T::Hash to H256 - Implement the block hash API --------- Signed-off-by: xermicus <[email protected]> Signed-off-by: Cyrill Leutwiler <[email protected]> Co-authored-by: command-bot <> Co-authored-by: GitHub Action <[email protected]>