* Add DefensiveTruncateFrom

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Add tests

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Fix tests

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Map_err in preimage

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Map_err in beefy

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Make test dependant in debug-assertions

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

Signed-off-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: parity-processbot <>